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Hangzhou Hengkang Special Vehicle CO.,LTD
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what is trailer jacks (6)
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Hangzhou Hengkang Special Vehicle CO.,LTD [China (Mainland)]
Business Type:Manufacturer
City: Hangzhou
Province/State: Zhejiang
Country/Region: China (Mainland)
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what is trailer jacks
what is trailer jacks?
Most of the trailer jacks are used to support the trailer when the trailer and the tractor are disengaged. The existing trailer jack structure includes an outer cylinder mounted on the trailer with an inner cylinder below the top of the outer cylinder, And the screw is rotatably moved into the upper and lower linear motion of the inner cylinder, the screw tip is fixed with a handle, and the upper part of the outer cylinder and the screw are connected with the screw, and the screw is connected with the screw in the inner cylinder With the support of the bearing, the lower part of the inner tube out of the outer tube and welded with a tripod, foot mounted on the caster, the lower part of the inner tube and the tripod is welded and fixed, and the inner cylinder relative to the outer tube and only up and down linear motion, In the actual use of the structure of the trailer jack is only suitable for trailer out of the tractor when the temporary parking, and once the trailer connected to the tractor, in order not to trailer jack hit the ground, only the entire trailer jack , So that when the traction unloading, disengage when installed, the use of trouble, time-consuming and laborious; at the same time some occasions the trailer need to lift a higher height, so that the trailer truck tilted, so that the goods can be used to self- And the existing trailer jack only rely on the screw to drive the upper and lower movement of the cylinder to achieve the purpose of lifting height, the lifting height is still a slight shortage, for example, will be loaded on the trailer yacht in the water, the lifting height Often not reach a certain tilt angle, so by virtue of the yacht's own weight is difficult to automatically slide out of the car, the other need to carry out the manual, very inconvenient. SUMMARY OF THE INVENTION The technical problem to be solved by the utility model is to overcome the drawbacks of the prior art and to provide a trailer jack which is flexible and convenient to be used when the trailer is disengaged or connected to the tractor and has a higher lift height The The technical problem of the utility model achieves a trailer jack by the following technical scheme, which comprises an outer cylinder mounted on the trailer and an inner cylinder which is arranged in the outer cylinder and lower than the top of the outer cylinder, and the screw connected to the top of the outer cylinder And is connected with the nut fixed in the inner cylinder. The screw tip is fixed with a handle and is transformed into a vertical and horizontal movement of the inner cylinder by the rotational movement of the screw, and a bearing bearing is arranged between the upper part of the outer cylinder and the screw, And a cradle is mounted on the tripod, characterized in that the tripod is hinged to the lower end of the inner cylinder, and the lower end of the inner cylinder is provided with a locking stand to lift and release two state positions And a mechanism for adjusting the opening and closing shaft of the opening and closing shaft through the inner cylinder opening and closing hole and the tripod lining plate, And a switch ring is provided in the lower part of the outer cylinder, and the switch ring and the switch piece constitute the opening and closing of the locking mechanism. The outer wall of the outer part of the outer cylinder is provided with a fuel filler, and the outer wall of the lower part of the outer cylinder is welded with a bracket connected with the trailer installation. The opening and closing shaft is a polygonal shaft, and the opening and closing hole is fitted with a polygonal hole. And the contact surface of the switch piece and the outer cylinder switch ring is curved. Compared with the prior art, the utility model is designed so as to be fixed to the lower part of the inner cylinder and is hinged with the inner cylinder, and is arranged on the inner cylinder for lifting and lowering the two state positions after the hinge. Lock the body, the improved structure to use more flexible and convenient, when the tripod will lift the tripod, when the tripod down support, so whether the tractor and trailer are not in the connection state are not required to remove the trailer jack, Saving more time, to overcome the trailer jack trouble and time-consuming and laborious defects, and has a higher lifting height, can reach a more inclined angle, to meet the functional needs.
Most of the trailer jacks are used to support the trailer when the trailer and the tractor are disengaged. The existing trailer jack structure includes an outer cylinder mounted on the trailer with an inner cylinder below the top of the outer cylinder, And the screw is rotatably moved into the upper and lower linear motion of the inner cylinder, the screw tip is fixed with a handle, and the upper part of the outer cylinder and the screw are connected with the screw, and the screw is connected with the screw in the inner cylinder With the support of the bearing, the lower part of the inner tube out of the outer tube and welded with a tripod, foot mounted on the caster, the lower part of the inner tube and the tripod is welded and fixed, and the inner cylinder relative to the outer tube and only up and down linear motion, In the actual use of the structure of the trailer jack is only suitable for trailer out of the tractor when the temporary parking, and once the trailer connected to the tractor, in order not to trailer jack hit the ground, only the entire trailer jack , So that when the traction unloading, disengage when installed, the use of trouble, time-consuming and laborious; at the same time some occasions the trailer need to lift a higher height, so that the trailer truck tilted, so that the goods can be used to self- And the existing trailer jack only rely on the screw to drive the upper and lower movement of the cylinder to achieve the purpose of lifting height, the lifting height is still a slight shortage, for example, will be loaded on the trailer yacht in the water, the lifting height Often not reach a certain tilt angle, so by virtue of the yacht's own weight is difficult to automatically slide out of the car, the other need to carry out the manual, very inconvenient. SUMMARY OF THE INVENTION The technical problem to be solved by the utility model is to overcome the drawbacks of the prior art and to provide a trailer jack which is flexible and convenient to be used when the trailer is disengaged or connected to the tractor and has a higher lift height The The technical problem of the utility model achieves a trailer jack by the following technical scheme, which comprises an outer cylinder mounted on the trailer and an inner cylinder which is arranged in the outer cylinder and lower than the top of the outer cylinder, and the screw connected to the top of the outer cylinder And is connected with the nut fixed in the inner cylinder. The screw tip is fixed with a handle and is transformed into a vertical and horizontal movement of the inner cylinder by the rotational movement of the screw, and a bearing bearing is arranged between the upper part of the outer cylinder and the screw, And a cradle is mounted on the tripod, characterized in that the tripod is hinged to the lower end of the inner cylinder, and the lower end of the inner cylinder is provided with a locking stand to lift and release two state positions And a mechanism for adjusting the opening and closing shaft of the opening and closing shaft through the inner cylinder opening and closing hole and the tripod lining plate, And a switch ring is provided in the lower part of the outer cylinder, and the switch ring and the switch piece constitute the opening and closing of the locking mechanism. The outer wall of the outer part of the outer cylinder is provided with a fuel filler, and the outer wall of the lower part of the outer cylinder is welded with a bracket connected with the trailer installation. The opening and closing shaft is a polygonal shaft, and the opening and closing hole is fitted with a polygonal hole. And the contact surface of the switch piece and the outer cylinder switch ring is curved. Compared with the prior art, the utility model is designed so as to be fixed to the lower part of the inner cylinder and is hinged with the inner cylinder, and is arranged on the inner cylinder for lifting and lowering the two state positions after the hinge. Lock the body, the improved structure to use more flexible and convenient, when the tripod will lift the tripod, when the tripod down support, so whether the tractor and trailer are not in the connection state are not required to remove the trailer jack, Saving more time, to overcome the trailer jack trouble and time-consuming and laborious defects, and has a higher lifting height, can reach a more inclined angle, to meet the functional needs.
