Improved folding horizontal jack

Abstract

An improved folding horizontal jack comprises a rack module, a front wheel frame, a rear wheel frame and a pair of supporting shafts. The rack module is provided with two wallboards, and the front wheel frame and the rear wheel frame are hinged to the two wallboards and form a rotation center; the two supporting shafts detachably penetrate through the front wheel frame and the two wallboards and the rear wheel frame and the two wallboards respectively. A front wheel frame adjusting limiting hole group and a rear wheel frame adjusting limiting hole group are further formed in the two wallboards, each of the front wheel frame adjusting limiting hole group and the rear wheel frame adjusting limiting hole group comprises at least two limiting holes, limiting pieces are arranged in the multiple limiting holes, and the limiting pieces are used for limiting the adjusting positions of the front wheel frame and the rear wheel frame; the horizontal jack has the advantages that the adjusting height can be efficiently and conveniently determined by additionally arranging the limiting piece, the adjusting time is greatly shortened, the operation intensity is reduced, precision, high efficiency and safety of height adjustment of the horizontal jack are achieved, use safety is guaranteed, and the horizontal jack has remarkable popularization significance.

Description

Technical Field

[0001] This utility model belongs to the technical field of jack equipment, specifically relating to an improved folding horizontal jack. Background Technology

[0002] A horizontal jack is a lightweight lifting device based on hydraulic principles, mainly used in automotive repair, industrial equipment installation, and other fields. A horizontal jack primarily consists of a handle, wall panel assembly, a pair of front wheels, a pair of rear wheels, a hydraulic pump, a cover plate, a lifting arm, and a pallet. Utilizing Pascal's principle, the handle converts manual or mechanical power into hydraulic energy via the hydraulic pump, driving the piston, lifting arm, and pallet to lift heavy objects. The maximum lifting capacity can reach 20 tons. Compared to traditional jacks, the horizontal design allows for operation without bending over, enabling lifting while standing, combining the advantages of labor-saving and safety. However, existing horizontal jacks have their front wheels mounted on the wall panel via a front wheel axle, and the rear wheels mounted on the wall panel via a wheel bracket. When adjusting the height of the front and rear wheels, it is necessary to manually align the wall panel with the limiting holes of the front wheel axle and wheel bracket, and then insert a pin to fix it. In other words, its height adjustment method mainly relies on manual mechanical hole alignment. Such a structure is time-consuming and labor-intensive to adjust, and there is no reference alignment position. It requires repeated trial and error to locate, which is time-consuming, labor-intensive, and inefficient. At the same time, it relies on a single pin for fixing and lacks multiple combined locking mechanisms, resulting in poor safety. In the prior art, the safety support structure of the horizontal jack with patent publication number CN222099437U proposes a split support frame and a gear-type connection structure. Although the support length can be adjusted, the lever unlocking component needs to be manually operated, and the adjustment process is still complicated and relies on the coordination of multiple parts, which poses a risk of loosening. For example, the horizontal hydraulic jack with patent publication number CN221894612U locks the moving wheel with a screw and locking pin, which improves the stability of the overall structure, but the handwheel needs to be rotated and the limit hole precisely aligned during adjustment, making the operation steps cumbersome.

[0003] In view of the above, it is necessary to reasonably modify the existing front and rear wheel connection and fixing structure of the horizontal jack. By creatively adding a limiting component structure, the convenience of height adjustment is improved while the fixing safety is greatly guaranteed. To this end, the applicant has made a beneficial design, and the technical solution described below is the result of this design. Utility Model Content

[0004] The objective of this invention is to provide an improved folding horizontal jack that is easy to assemble, safe and quick to use, and reliable and durable. By adding a limiting component as an adjustment reference, it achieves efficient and quick alignment and positioning, ensures accurate and reliable adjustment of the wheel frame height, and significantly improves safety in use.

[0005] The present invention achieves its objective as follows: an improved folding horizontal jack includes a frame module, a front wheel frame, a rear wheel frame, a pair of support shafts, and multiple limiting components. The frame module has two parallel, spaced-apart wall panels fixedly connected together. The front wheel frame and the rear wheel frame are respectively hinged to the two wall panels of the frame module via a front hinge shaft and a rear hinge shaft, forming a rotation center. The two support shafts detachably pass through the front wheel frame and the two wall panels, and the rear wheel frame and the two wall panels, respectively. Furthermore, the two support shafts can respectively fix the front wheel frame and the rear wheel frame on the frame module; the feature is that: the two wall plates of the frame module are provided with a front wheel frame adjustment limiting hole group and a rear wheel frame adjustment limiting hole group, each of the front wheel frame adjustment limiting hole group and the rear wheel frame adjustment limiting hole group includes at least two limiting holes, and limiting members are provided in the multiple limiting holes of the front wheel frame adjustment limiting hole group and the rear wheel frame adjustment limiting hole group, the limiting members are used to limit the adjustment position of the front wheel frame and the rear wheel frame.

[0006] In a specific embodiment of this utility model, the front wheel frame adjustment limiting hole group includes a front wheel frame low-position limiting hole and a front wheel frame high-position limiting hole disposed on the side of the front wheel frame opposite to the rear wheel frame. The front wheel frame low-position limiting hole is disposed near the top of the front part of the wall panel and penetrates the thickness direction of the wall panel, while the front wheel frame high-position limiting hole is disposed near the bottom of the front part of the wall panel and also penetrates the thickness direction of the wall panel. The high-position limiting holes of the front wheel frame are arranged at an angle, which is equal to the central angle of the line connecting the low-position limiting holes and the high-position limiting holes of the front wheel frame with the rotation center of the front wheel frame; the limiting member passes through the low-position limiting holes and the high-position limiting holes of the front wheel frame; when the frame module is in the low position, its rear end abuts against the limiting member in the low-position limiting hole of the front wheel frame, and when the frame module is in the high position, its rear end abuts against the limiting member in the high-position limiting hole of the front wheel frame.

[0007] In another specific embodiment of this utility model, the rear wheel frame adjustment limiting hole group includes a low-position limiting hole and a high-position limiting hole on the rear wheel frame opposite to the front wheel frame. The low-position limiting hole is located near the top of the wall panel and penetrates the thickness direction of the wall panel, while the high-position limiting hole is located near the bottom of the rear of the wall panel and also penetrates the thickness direction of the wall panel. The limiting hole and the high limiting hole of the rear wheel frame are arranged at an angle, which is equal to the central angle of the line connecting the low limiting hole and the high limiting hole of the rear wheel frame with the rotation center of the rear wheel frame; the limiting member passes through the low limiting hole and the high limiting hole of the rear wheel frame; when the frame module is in the low position, it abuts against the limiting member in the low limiting hole of the rear wheel frame, and when the frame module is in the high position, it abuts against the limiting member in the high limiting hole of the rear wheel frame.

[0008] In another specific embodiment of this utility model, the front wheel frame is an integrated frame structure with a "П"-shaped structure, and the front wheel frame has a front wheel frame connecting plate and two front wheel frame mounting plates respectively formed at both ends of the front wheel frame connecting plate in the length direction; wherein, the two front wheel frame mounting plates are respectively attached to the outer surface of their respective corresponding wall panels, and the two ends of the front hinge axis of the wall panel extend outward from the two side wall panels and pass through their respective corresponding front wheel frame mounting plates, and each of the two front wheel frame mounting plates is also provided with a front wheel frame mounting plate hinge bolt, and the two front wheel frame mounting plate hinge bolts are respectively fitted to the two ends of the wall panel extending out of the wall panel in the length direction of the front hinge axis, thereby realizing the rotational connection between the two front wheel frame mounting plates and their respective corresponding wall panels, so that the front wheel frame is rotatably connected to the frame module.

[0009] In another specific embodiment of this utility model, a front wheel frame mounting plate fixing hole is provided on each of the two front wheel frame mounting plates of the front wheel frame at the upper position corresponding to the middle of the length direction of the front wheel frame mounting plate. The front wheel frame mounting plate fixing hole penetrates the thickness direction of the front wheel frame mounting plate. A front wheel frame upper fixing hole is also provided at the upper position of the front end of the wall panel near the front end of the front wheel frame in the length direction. A front wheel frame lower fixing hole is also provided at the front end of each of the two wall panels in the length direction, below the front wheel frame upper fixing hole. A front wheel frame upper fixing hole bushing is provided between the two front wheel frame upper fixing holes, and a front wheel frame lower fixing hole bushing is provided between the two front wheel frame lower fixing holes. The support shaft can pass through the front wheel frame mounting plate fixing holes on the two opposing front wheel frame mounting plates, and a support shaft is also provided on the support shaft. Fixed pins; When the frame module is in the low position, the length direction of the front wheel frame mounting plate is parallel to the length direction of the wall panel. The support shaft can pass through the two front wheel frame mounting plate fixing holes and the two front wheel frame upper fixing holes and enter the bushing of the front wheel frame upper fixing hole. The support shaft can be fixed to the front wheel frame and the wall panel by the support shaft fixing pin, thereby achieving a fixed connection between the front wheel frame and the wall panel. When the frame module is in the high position, the front wheel frame can be flipped downward and the front wheel frame mounting plate fixing holes can be moved to the position corresponding to the front wheel frame lower fixing holes. The support shaft can pass through the two front wheel frame mounting plate fixing holes and the two front wheel frame lower fixing holes and enter the bushing of the front wheel frame lower fixing hole. The support shaft can be fixed to the front wheel frame and the wall panel by the support shaft fixing pin, thereby again achieving a fixed connection between the front wheel frame and the wall panel.

[0010] In another specific embodiment of this utility model, the rear wheel frame is also an integrated frame structure with a "П"-shaped structure, and the rear wheel frame has a rear wheel frame connecting plate and two rear wheel frame mounting plates respectively formed at both ends of the rear wheel frame connecting plate in the length direction; wherein, the two rear wheel frame mounting plates are respectively attached to the outer surface of their respective corresponding wall panels, and the two ends of the rear hinge axis of the wall panel extend outward from the wall panels on both sides and pass through their respective corresponding rear wheel frame mounting plates, and each of the two rear wheel frame mounting plates is also provided with a rear wheel frame mounting plate hinge bolt, and the two rear wheel frame mounting plate hinge bolts are respectively fitted to the two ends of the wall panel extending in the length direction of the rear hinge axis, thereby realizing the rotational connection between the two rear wheel frame mounting plates and their respective corresponding wall panels, so that the rear wheel frame is rotatably connected to the frame module.

[0011] In a further specific embodiment of this utility model, a rear wheel frame mounting plate fixing hole is also provided on both rear wheel frame mounting plates of the rear wheel frame at the upper position corresponding to the middle of the length direction of the rear wheel frame mounting plate. The rear wheel frame mounting plate fixing hole penetrates the thickness direction of the rear wheel frame mounting plate. A rear wheel frame upper fixing hole is also provided at the upper position of the rear end of the wall panel near the rear wheel frame in the length direction, and a rear wheel frame lower fixing hole is also provided at the rear end of both wall panels in the length direction and below the position corresponding to the rear wheel frame upper fixing hole. The support shaft can pass through the rear wheel frame mounting plate fixing holes on the two opposing rear wheel frame mounting plates, and a support shaft fixing pin is also provided on the support shaft. When the frame module When in the low position, the length direction of the rear wheel frame mounting plate is parallel to the length direction of the wall panel. The support shaft can pass through the fixing holes of the two rear wheel frame mounting plates and the two upper fixing holes of the rear wheel frame. The support shaft can be fixed to the rear wheel frame and the wall panel by the support shaft fixing pin, thereby achieving a fixed connection between the rear wheel frame and the wall panel. When the frame module is in the high position, the rear wheel frame can be flipped downward and the fixing holes of the rear wheel frame mounting plates can be moved to the position corresponding to the lower fixing holes of the rear wheel frame. The support shaft can pass through the fixing holes of the two rear wheel frame mounting plates and the two lower fixing holes of the rear wheel frame. The support shaft can be fixed to the rear wheel frame and the wall panel by the support shaft fixing pin, thereby again achieving a fixed connection between the rear wheel frame and the wall panel.

[0012] In a further specific embodiment of this utility model, the length of the limiting member extending out of the wall plate matches the thickness of the front wheel frame and the rear wheel frame to achieve position limiting of the front wheel frame and the rear wheel frame.

[0013] In another specific embodiment of this utility model, a lifting arm is provided between the two wall panels. The lifting arm is hinged to the two wall panels. A lifting bracket is provided at one end of the lifting arm along its length. A handle is connected to the other end of the lifting arm along its length. The handle can drive the lifting arm to move through a hydraulic assembly.

[0014] In another specific embodiment of this utility model, a pair of front wheels are provided on both sides of the front wheel frame. The two front wheels are connected to the front wheel frame in a symmetrical manner and can be supported on a horizontal surface, and the bottom of the front wheels is lower than the bottom of the front wheel frame. A pair of rear wheels are provided on both sides of the rear wheel frame. The two rear wheels are connected to the rear wheel frame in a symmetrical manner and can be supported on a horizontal surface, and the bottom of the rear wheels is lower than the bottom of the rear wheel frame.

[0015] The beneficial effects of this utility model are as follows: First, by using the added limiting component as an adjustment benchmark, it directly acts on the target positions of different height gears of the front and rear wheel frames. Compared with the traditional solution that relies on manual visual alignment of holes, which is inefficient and prone to errors, during operation, only the angle of the front and rear wheel frames needs to be adjusted according to the positioning indication of the limiting component to quickly complete the alignment of the support shaft and the fixing hole, completely eliminating the trouble of blindly searching for the hole position, greatly shortening the adjustment time and reducing the operational intensity, and significantly improving the ease of operation; Second, the hidden dangers of support shaft misalignment and other problems caused by hole position deviation during the traditional adjustment process are effectively eliminated, as the limiting component is based on the rotation center. The geometric relationship between the front and rear wheel frames and the different limit holes ensures that the front and rear wheel frames can only be locked within a preset safe angle range, avoiding structural instability caused by angle deviation. At the same time, the locking and fixing mechanism of the support shaft and the support shaft fixing pin further strengthens the connection rigidity, ensures the stability of use and operation, and effectively optimizes the safety of structural operation. Furthermore, the integrated front and rear wheel frames are linked with a rotation center, so that the height adjustment action and the wheel frame flipping trajectory are highly matched, ensuring that the center of gravity of the equipment is always within a controllable range when switching between different gears. It is suitable for conventional lifting scenarios and can also flexibly cope with complex working conditions in narrow spaces or on inclined ground, which has significant promotional value. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention in a low-position state;

[0017] Figure 2 An exploded three-dimensional structural diagram of this utility model in a low-position state;

[0018] Figure 3 This is a three-dimensional structural diagram of the present invention in a high-position state;

[0019] In the diagram: 1. Frame module; 11. Wall panel; 111. Front wheel frame upper fixing hole; 1111. Front wheel frame upper fixing hole bushing; 112. Front wheel frame lower fixing hole; 1121. Front wheel frame lower fixing hole bushing; 113. Rear wheel frame upper fixing hole; 114. Rear wheel frame lower fixing hole; 12. Front wheel frame adjustment limit hole group; 121. Front wheel frame low position limit hole; 122. Front wheel frame high position limit hole; 13. Rear wheel frame adjustment limit hole group; 131. Rear wheel frame low position limit hole; 132. Rear wheel frame high position limit hole; 14. Starting... 1. Heavy boom, 15 lifting bracket; 2. Front wheel frame, 21 front wheel frame connecting plate, 22 front wheel frame mounting plate, 221 front wheel frame mounting plate hinge bolt, 222 front wheel frame mounting plate fixing hole, 23 front wheel; 3. Rear wheel frame, 31 rear wheel frame connecting plate, 32 rear wheel frame mounting plate, 321 rear wheel frame mounting plate hinge bolt, 322 rear wheel frame mounting plate fixing hole, 33 rear wheel; 4. Support shaft, 41 support shaft fixing pin; 5. Limiting component; 6. Front hinge shaft of wall panel; 7. Rear hinge shaft of wall panel; 8. Handle. Detailed Implementation

[0020] The following will provide a detailed description by way of embodiments. However, the description of the embodiments is not intended to limit the present utility model. Any formal but not substantive equivalent transformations made based on the present utility model concept should be considered within the scope of the present utility model's technical solution.

[0021] In the following description, all directional or orientational concepts involving up, down, left, right, front, and back refer to the current situation. Figure 1 The description pertains to the location and state of the object, and therefore should not be construed as a specific limitation on the technical solution provided by this utility model.

[0022] Please see Figures 1 to 3This paper illustrates an improved folding horizontal jack, comprising: a frame module 1, a front wheel frame 2, a rear wheel frame 3, and a pair of support shafts 4. The frame module 1 has two parallel, spaced-apart wall panels 11 fixedly connected together. The front wheel frame 2 and the rear wheel frame 3 are respectively hinged to the two wall panels 11 of the frame module 1 via a front hinge shaft 6 and a rear hinge shaft 7, forming a rotation center. The hinge shaft structure design allows the front wheel frame 2 and the rear wheel frame 3 to rotate freely around the axis, realizing the folding function. The two support shafts 4 are detachably inserted through the front wheel frame 2 and the two wall panels 11, and the rear wheel frame 3 and the two wall panels 11, respectively. The two support shafts 4 can respectively enable the front wheel frame 2 and the rear wheel frame 3 to be mounted on the frame. The fixed position on module 1 allows for quick switching between the low and high positions of the horizontal jack via the plug-in support shaft 4. The two wall panels 11 of the aforementioned frame module 1 are equipped with a front wheel frame adjustment limit hole group 12 and a rear wheel frame adjustment limit hole group 13. Both the front wheel frame adjustment limit hole group 12 and the rear wheel frame adjustment limit hole group 13 contain at least two limit holes. Limiting elements 5 are provided in each of the multiple limit holes in the front wheel frame adjustment limit hole group 12 and the rear wheel frame adjustment limit hole group 13. These limiting elements 5 are used to limit the adjustment positions of the front wheel frame 2 and the rear wheel frame 3. The limiting elements 5 are preferably screws. The quick and accurate height adjustment of the horizontal jack is achieved through the combination of the limiting holes and the screws.

[0023] In this embodiment, the aforementioned front wheel frame adjustment limiting hole group 12 includes a front wheel frame low-position limiting hole 121 and a front wheel frame high-position limiting hole 122 disposed on the side of the front wheel frame 2 opposite to the rear wheel frame 3. The aforementioned front wheel frame low-position limiting hole 121 is disposed near the top of the front part of the aforementioned wall panel 11 and penetrates the thickness direction of the wall panel 11, while the aforementioned front wheel frame high-position limiting hole 122 is disposed near the bottom of the front part of the aforementioned wall panel 11 and also penetrates the thickness direction of the wall panel 11. The aforementioned front wheel frame low-position limiting hole 121 and front wheel frame high-position limiting hole 122 are disposed near the bottom of the front part of the aforementioned wall panel 11 and also penetrate the thickness direction of the wall panel 11. The limiting holes 122 are arranged at an included angle, which is equal to the central angle of the line connecting the low limiting hole 121 and the high limiting hole 122 of the front wheel frame with the rotation center of the front wheel frame 2; the aforementioned limiting member 5 passes through the aforementioned low limiting hole 121 and the high limiting hole 122 of the front wheel frame; when the aforementioned frame module 1 is in the low position, its rear end abuts against the limiting member 5 in the low limiting hole 121 of the front wheel frame, and when the aforementioned frame module 1 is in the high position, its rear end abuts against the limiting member 5 in the high limiting hole 122 of the front wheel frame.

[0024] Furthermore, the aforementioned rear wheel frame adjustment limiting hole group 13 includes a rear wheel frame low limiting hole 131 and a rear wheel frame high limiting hole 132 disposed on the side of the aforementioned rear wheel frame 3 opposite to the aforementioned front wheel frame 2. The aforementioned rear wheel frame low limiting hole 131 is disposed near the top of the aforementioned wall panel 11 and penetrates the thickness direction of the wall panel 11, while the aforementioned rear wheel frame high limiting hole 132 is disposed near the bottom of the rear of the aforementioned wall panel 11 and also penetrates the thickness direction of the wall panel 11. The aforementioned rear wheel frame low limiting hole 131 and rear wheel frame high limiting hole 132 are arranged at an angle, and the angle is equal to the angle between the rear wheel frame low limiting hole 131 and the rear wheel frame. The central angle between the high-position limiting hole 132 and the rotation center of the rear wheel frame 3 is designed to ensure that the limiting hole of the front wheel frame at different heights maintains geometric linkage with the rotation center, avoiding structural interference. The aforementioned limiting member 5 passes through the aforementioned low-position limiting hole 131 and high-position limiting hole 132 of the rear wheel frame. When the aforementioned frame module 1 is in the low position, it abuts against the limiting member 5 in the low-position limiting hole 131 of the rear wheel frame, and when the aforementioned frame module 1 is in the high position, it abuts against the limiting member 5 in the high-position limiting hole 132 of the rear wheel frame. The mechanical limiting is achieved through the physical abutment between the limiting member 5 and the rear wheel frame 3, preventing accidental displacement.

[0025] It should be noted that: In this technical solution, the front wheel frame adjustment limiting hole group 12 of the wall panel 11 only includes two limiting holes, namely the front wheel frame low limiting hole 121 and the front wheel frame high limiting hole 122. When the front wheel frame 2 is flipped downward, its front wheel frame 3 can only be aligned with the front wheel frame high limiting hole 122 and fixed by the support shaft 4, so that the front wheel frame 2 can only be fixed at one preset position after being flipped downward. The two-hole design simplifies the operation steps and is suitable for basic lifting requirements. Of course, the number of limiting holes included in the aforementioned front wheel frame adjustment limiting hole group 12 is not limited to this. During production, the number of limiting holes can be increased according to actual needs, so that the front wheel frame 2 can be fixed at multiple preset positions below the wall panel 11. The extended multi-hole design can adapt to multi-level height adjustment under complex working conditions. The same applies to the number of limiting holes included in the rear wheel frame adjustment limiting hole group 13, all of which are within the protection scope of this utility model.

[0026] Furthermore, the aforementioned front wheel frame 2 is an integrated frame structure with a "П"-shaped structure. The "П"-shaped structure provides double-sided support surfaces, enhancing torsional resistance. The front wheel frame 2 includes a front wheel frame connecting plate 21 and two front wheel frame mounting plates 22 respectively formed at both ends of the front wheel frame connecting plate 21 along its length. The two aforementioned front wheel frame mounting plates 22 are respectively attached to the outer surface of their respective corresponding wall panels 11, and the two ends of the aforementioned wall panel front hinge shaft 6 extend outwards along its length. The wall panels 11 on both sides pass through their respective front wheel frame mounting plates 22. Each of the two aforementioned front wheel frame mounting plates 22 is also equipped with a front wheel frame mounting plate hinge bolt 221. The two aforementioned front wheel frame mounting plate hinge bolts 221 are respectively installed on the two ends of the aforementioned wall panel front hinge shaft 6 protruding from the aforementioned wall panel 11 in the length direction, thereby realizing the rotational connection between the two aforementioned front wheel frame mounting plates 22 and their respective corresponding wall panels 11, so that the aforementioned front wheel frame 2 is rotatably connected to the frame module 1.

[0027] In this embodiment, a front wheel frame mounting plate fixing hole 222 is provided on both front wheel frame mounting plates 22 of the aforementioned front wheel frame 2 at the upper position corresponding to the middle of the length direction of the front wheel frame mounting plate 22. The aforementioned front wheel frame mounting plate fixing hole 222 penetrates the thickness direction of the aforementioned front wheel frame mounting plate 22. A front wheel frame mounting hole 111 is also provided at the upper position of the front end of the aforementioned wall panel 11 near the front end of the front wheel frame 2 in the length direction. Below each of the fixed holes 111, there is a lower front wheel frame fixing hole 112. A front wheel frame upper fixing hole bushing 1111 is provided between the two aforementioned upper front wheel frame fixing holes 111, and a front wheel frame lower fixing hole bushing 1121 is provided between the two aforementioned lower front wheel frame fixing holes 112. The aforementioned support shaft 4 can pass through the front wheel frame mounting plate fixing holes 222 on the two opposite front wheel frame mounting plates 22, and a support shaft fixing pin 41 is also provided on the aforementioned support shaft 4. When the aforementioned frame module 1 is in a low position, the aforementioned front wheel frame The length of the mounting plate 22 is parallel to the length of the wall panel 11. The support shaft 4 can pass through the fixing holes 222 of the two front wheel frame mounting plates and the fixing holes 111 on the two front wheel frames and enter the bushing 1111 of the fixing holes on the front wheel frames. The support shaft 4 can be fixed to the front wheel frame 2 and the wall panel 11 by the support shaft fixing pin 41, thereby realizing the fixed connection between the front wheel frame 2 and the wall panel 11. When the frame module 1 is in the high position, the front wheel frame 2 can be flipped downward and the front wheel frame mounting plate is fixed. Hole 222 can be moved to a position corresponding to the aforementioned front wheel frame lower fixing hole 112. The aforementioned support shaft 4 can pass through the two front wheel frame mounting plate fixing holes 222 and the two front wheel frame lower fixing holes 112 and enter the aforementioned front wheel frame lower fixing hole bushing 1121. The support shaft 4 can be fixed to the front wheel frame 2 and the wall panel 11 by the support shaft fixing pin 41, thereby achieving a fixed connection between the front wheel frame 2 and the wall panel 11 again. In addition, the support shaft fixing pin 41 adopts a pin-type locking to ensure that the support shaft 4 will not accidentally come out when subjected to force.

[0028] Please continue reading Figures 1 to 3The aforementioned rear wheel frame 3 is also an integrated frame structure with a "П"-shaped structure. The rear wheel frame 3 has a rear wheel frame connecting plate 31 and two rear wheel frame mounting plates 32 respectively formed at both ends of the rear wheel frame connecting plate 31 in the length direction. The two rear wheel frame mounting plates 32 are respectively attached to the outer surface of their respective wall panels 11. The two ends of the rear hinge shaft 7 of the wall panel extend outward from the two wall panels 11 and pass through their respective rear wheel frame mounting plates 32. Each of the two rear wheel frame mounting plates 32 is also equipped with a rear wheel frame mounting plate hinge bolt 321. The two rear wheel frame mounting plate hinge bolts 321 are respectively fitted to the two ends of the rear hinge shaft 7 of the wall panel protruding from the wall panel 11 in the length direction, thereby realizing the rotational connection between the two rear wheel frame mounting plates 32 and their respective wall panels 11, so that the rear wheel frame 3 is rotatably connected to the frame module 1.

[0029] In this embodiment, the aforementioned front wheel frame 2 and rear wheel frame 3 are both integrally formed structures. Integral forming improves the bending stiffness of the structure and ensures that the front wheel frame 2 and rear wheel frame 3 are free from deformation.

[0030] Furthermore, a rear wheel frame mounting plate fixing hole 322 is also provided on both rear wheel frame mounting plates 32 of the aforementioned rear wheel frame 3, at the upper position corresponding to the middle of the length direction of the rear wheel frame mounting plate 32. The aforementioned rear wheel frame mounting plate fixing hole 322 penetrates the thickness direction of the aforementioned rear wheel frame mounting plate 32. A rear wheel frame upper fixing hole 113 is also provided at the upper position of the rear end of the aforementioned wall plate 11 near the rear end of the rear wheel frame 3 in the length direction, and a rear wheel frame lower fixing hole 114 is also provided at the rear end of the two aforementioned wall plates 11 in the length direction and below the position corresponding to the rear wheel frame upper fixing hole 113. The aforementioned support shaft 4 can pass through the rear wheel frame mounting plate fixing holes 322 on the two opposing rear wheel frame mounting plates 32, and a support shaft fixing pin 41 is also provided on the aforementioned support shaft 4. When the aforementioned frame module 1 is in a low position, the aforementioned rear wheel frame mounting plate fixing hole 322 is also provided on the aforementioned support shaft 3. The length direction of the wheel frame mounting plate 32 is parallel to the length direction of the wall panel 11. The support shaft 4 can pass through the two rear wheel frame mounting plate fixing holes 322 and the two rear wheel frame upper fixing holes 113. The support shaft 4 can be fixed to the rear wheel frame 3 and the wall panel 11 by the support shaft fixing pin 41, thereby realizing the fixed connection between the rear wheel frame 3 and the wall panel 11. When the aforementioned frame module 1 is in a high position, the aforementioned rear wheel frame 3 can be flipped downward and the aforementioned rear wheel frame mounting plate fixing holes 322 can be moved to the position corresponding to the aforementioned rear wheel frame lower fixing hole 114. The aforementioned support shaft 4 can pass through the two rear wheel frame mounting plate fixing holes 322 and the two rear wheel frame lower fixing holes 114. The support shaft 4 can be fixed to the rear wheel frame 3 and the wall panel 11 by the support shaft fixing pin 41, thereby again realizing the fixed connection between the rear wheel frame 3 and the wall panel 11.

[0031] In this embodiment, the length of the aforementioned limiting member 5 extending out of the aforementioned wall panel 11 matches the thickness of the front wheel frame 2 and the rear wheel frame 3 to achieve position limiting of the front wheel frame 2 and the rear wheel frame 3; precise control of the extension amount of the limiting member 5 can avoid space occupation or interference caused by excessive protrusion.

[0032] Furthermore, a lifting arm 14 is provided between the two aforementioned wall panels 11. The lifting arm 14 is hinged to the two wall panels 11. A lifting bracket 15 is provided at one end of the lifting arm 14 along its length. A handle 8 is connected to the other end of the lifting arm 14 along its length. The handle 8 can drive the lifting arm 14 to move through a hydraulic assembly.

[0033] Preferably, a pair of front wheels 23 are provided on both sides of the aforementioned front wheel frame 2. The two aforementioned front wheels 23 are connected to the aforementioned front wheel frame 2 in a symmetrical state and can be supported on a horizontal surface, and the bottom of the aforementioned front wheels 23 is lower than the bottom of the aforementioned front wheel frame 2; a pair of rear wheels 33 are provided on both sides of the aforementioned rear wheel frame 3. The two aforementioned rear wheels 33 are connected to the aforementioned rear wheel frame 3 in a symmetrical state and can be supported on a horizontal surface, and the bottom of the aforementioned rear wheels 33 is lower than the bottom of the aforementioned rear wheel frame 3.

[0034] Please see Figures 1 to 3To briefly describe the working principle of this embodiment: When the lifting action of the aforementioned horizontal hydraulic jack needs to be achieved, the user repeatedly presses down the handle 8, thereby driving the hydraulic cylinder component to push the lifting arm 14 upward, and finally the lifting bracket 15 on the lifting arm 14 lifts the heavy object, i.e., the related facilities and equipment, upward; when it is necessary to adjust the height of the frame module 1 off the ground, if the aforementioned frame module 1 is in a low position, since the length direction of the front wheel frame mounting plate 22 and the rear wheel frame mounting plate 32 is parallel to the length direction of the aforementioned wall panel 11, the rear part of the front wheel frame mounting plate 22 abuts against the limiting member 5 that passes through the low position limiting hole 121 of the front wheel frame, and the rear wheel frame mounting plate 32 abuts against... The limiting member 5 is inserted into the low limiting hole 131 of the rear wheel frame. The support shaft 4 passes through the fixing holes 222 of the two front wheel frame mounting plates and the fixing holes 111 on the front wheel frame of the two wall plates 11 to fix the front wheel frame 2. The other support shaft 4 passes through the fixing holes 322 of the two rear wheel frame mounting plates and the fixing holes 113 on the rear wheel frame of the two wall plates 11 to fix the rear wheel frame 3. The user can then remove the support shaft fixing pin 41 and pull the support shaft 4 out from the front wheel frame 2 and the wall plate 11, and lift the frame module 1 of the aforementioned horizontal jack and the front half of the lifting arm 14, so that the front wheel frame 2 falls naturally around the front hinge shaft 6 of the wall plate, and further adjust the position of the front wheel frame 2 so that the front wheel frame 2... The front wheel frame mounting plate 22 abuts against the limiting member 5 that passes through the high limiting hole 122 of the front wheel frame, while the fixing hole 222 of the front wheel frame mounting plate is aligned with the lower fixing hole 112 of the front wheel frame. At this time, the two front wheels 23 move downward relative to the frame module 1 and can be supported on the ground, thereby causing the front part of the frame module 1 to be lifted upward. Similarly, the user removes the support shaft fixing pin 41 in the other support shaft 4, causing the rear wheel frame 2 to fall naturally around the rear hinge shaft 7 of the wall panel, and further adjusts the position of the rear wheel frame 3 so that the rear wheel frame mounting plate 32 of the rear wheel frame 3 abuts against the limiting member 5 that passes through the high limiting hole 132 of the rear wheel frame, while the fixing hole 322 of the rear wheel frame mounting plate is aligned with the lower fixing hole 112 of the rear wheel frame. When the 14 are aligned and overlapped, the two rear wheels 33 also move downward relative to the frame module 1 and can be supported on the ground. Finally, the two support shafts 4 are inserted again to fix the front wheel frame 2, the rear wheel frame 3 and the frame module 1. This allows the frame module 1 and the lifting arm 14, lifting bracket 15 and handle 8 connected to the frame module 1 to rise together. The limiting part 5 is used to achieve convenient and reliable adjustment of the height of the frame module 1 off the ground, so that the aforementioned horizontal jack can be used for lifting vehicles and mechanical equipment at different heights off the ground. When it is necessary to adjust the aforementioned horizontal hydraulic jack from the high position to the low position, simply reverse the above operation. The adjustment is simple, convenient and reliable.

[0035] It should be noted that the above embodiments can be freely combined as needed. The above are merely preferred embodiments of this utility model. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

[0036] In summary, the technical solution provided by this utility model overcomes the shortcomings of existing technologies, successfully fulfills the utility model's objectives, and faithfully delivers the technical effects described by the applicant in the above-mentioned technical effects section.

Claims

1. An improved folding scissor jack comprising: The rack module (1), the front wheel frame (2), the rear wheel frame (3), a pair of support shafts (4); the rack module (1) has two parallel and spaced wallboards (11) fixedly connected together, the front wheel frame (2) and the rear wheel frame (3) are hinged to the two wallboards (11) of the rack module (1) through the wallboard front hinge shaft (6) and the wallboard rear hinge shaft (7) respectively and form the rotation center; the two support shafts (4) are respectively detachably penetrated through the front wheel frame (2) and the two wallboards (11) and the rear wheel frame (3) and the two wallboards (11), and the two support shafts (4) can respectively realize the fixation of the front wheel frame (2) and the rear wheel frame (3) on the rack module (1); characterized in that the two wallboards (11) of the rack module (1) are provided with a front wheel frame adjusting limiting hole group (12) and a rear wheel frame adjusting limiting hole group (13), the front wheel frame adjusting limiting hole group (12) and the rear wheel frame adjusting limiting hole group (13) each contain at least two limiting holes, limiting pieces (5) are arranged in the multiple limiting holes of the front wheel frame adjusting limiting hole group (12) and the rear wheel frame adjusting limiting hole group (13), and the limiting pieces (5) are used for limiting the adjusting position of the front wheel frame (2) and the rear wheel frame (3).

2. The improved folding horizontal jack as claimed in claim 1, wherein: The front wheel frame adjusting limiting hole group (12) includes a front wheel frame low position limiting hole (121) and a front wheel frame high position limiting hole (122) arranged at the position opposite to the rear wheel frame (3) of the front wheel frame (2), the front wheel frame low position limiting hole (121) is arranged at the top end position of the front part of the wallboard (11) and penetrates the thickness direction of the wallboard (11), the front wheel frame high position limiting hole (122) is arranged at the bottom end position of the front part of the wallboard (11) and also penetrates the thickness direction of the wallboard (11), and the front wheel frame low position limiting hole (121) and the front wheel frame high position limiting hole (122) are arranged at an included angle, which is equal to the central angle of the line connecting the front wheel frame low position limiting hole (121) and the front wheel frame high position limiting hole (122) with the rotation center of the front wheel frame (2); the limiting pieces (5) are arranged in the front wheel frame low position limiting hole (121) and the front wheel frame high position limiting hole (122); when the rack module (1) is in a low position state, the rear end portion thereof abuts against the limiting piece (5) in the front wheel frame low position limiting hole (121), and when the rack module (1) is in a high position state, the rear end portion thereof abuts against the limiting piece (5) in the front wheel frame high position limiting hole (122).

3. The improved folding horizontal jack as claimed in claim 2, wherein: The rear wheel frame adjusting limiting hole group (13) comprises a rear wheel frame low position limiting hole (131) and a rear wheel frame high position limiting hole (132) arranged on the side of the rear wheel frame (3) opposite to the front wheel frame (2), the rear wheel frame low position limiting hole (131) is arranged at the top end position behind the wall plate (11) and penetrates the thickness direction of the wall plate (11), the rear wheel frame high position limiting hole (132) is arranged at the bottom end position behind the wall plate (11) and also penetrates the thickness direction of the wall plate (11), and the rear wheel frame low position limiting hole (131) and the rear wheel frame high position limiting hole (132) are arranged at an included angle, which is equal to the central angle of the line connecting the rear wheel frame low position limiting hole (131) and the rear wheel frame high position limiting hole (132) with the center of rotation of the rear wheel frame (3); the limiting piece (5) is arranged in the rear wheel frame low position limiting hole (131) and the rear wheel frame high position limiting hole (132); when the rack module (1) is in a low position, it abuts against the limiting piece (5) in the rear wheel frame low position limiting hole (131), and when the rack module (1) is in a high position, it abuts against the limiting piece (5) in the rear wheel frame high position limiting hole (132).

4. The improved folding horizontal jack as claimed in claim 1, wherein: The front wheel frame (2) is an integral frame structure in a "П" shape structure, and has a front wheel frame connecting plate (21) and two front wheel frame mounting plates (22) respectively arranged at the lengthwise two ends of the front wheel frame connecting plate (21); the two front wheel frame mounting plates (22) are respectively arranged on the outer side surfaces of the corresponding wall plates (11), the lengthwise two ends of the wall plate front hinge shaft (6) are respectively outwardly arranged through the two wall plates (11) and the corresponding front wheel frame mounting plates (22), and a front wheel frame mounting plate hinge bolt (221) is arranged on each of the front wheel frame mounting plates (22), and the two front wheel frame mounting plate hinge bolts (221) are respectively arranged on the lengthwise two ends of the wall plate front hinge shaft (6) outwardly arranged through the wall plates (11), so as to realize the rotational connection between the two front wheel frame mounting plates (22) and the corresponding wall plates (11), and realize the rotational connection between the front wheel frame (2) and the rack module (1).

5. The improved folding horizontal jack as claimed in claim 4 wherein: The front wheel frame (2) is provided with two front wheel frame mounting plates (22), and a front wheel frame mounting plate fixing hole (222) is formed in each of the front wheel frame mounting plates (22) and at an upper position corresponding to the middle of the length direction of the plate body of the front wheel frame mounting plate (22), and the front wheel frame mounting plate fixing hole (222) penetrates the thickness direction of the front wheel frame mounting plate (22); a front wheel frame upper fixing hole (111) is formed at an upper position of the front end of the wall plate (11) in the length direction of the wall plate (11), and a front wheel frame lower fixing hole (112) is formed at a lower position corresponding to the front wheel frame upper fixing hole (111) at the front end of the length direction of each of the wall plates (11); a front wheel frame upper fixing hole shaft sleeve (1111) is arranged between the front wheel frame upper fixing holes (111), and a front wheel frame lower fixing hole shaft sleeve (1121) is arranged between the front wheel frame lower fixing holes (112); the support shaft (4) can penetrate the front wheel frame mounting plate fixing holes (222) of the two front wheel frame mounting plates (22), and a support shaft fixing pin (41) is arranged on the support shaft (4); when the rack module (1) is in a low position, the length direction of the front wheel frame mounting plate (22) is parallel to the length direction of the wall plate (11), the support shaft (4) can penetrate the two front wheel frame mounting plate fixing holes (222) and the two front wheel frame upper fixing holes (111) and enter the front wheel frame upper fixing hole shaft sleeve (1111), the support shaft (4) can be fixed to the front wheel frame (2) and the wall plate (11) through the support shaft fixing pin (41), and the front wheel frame (2) and the wall plate (11) are fixedly connected; when the rack module (1) is in a high position, the front wheel frame (2) can be flipped downward, the front wheel frame mounting plate fixing holes (222) can be moved to positions corresponding to the front wheel frame lower fixing holes (112), the support shaft (4) can penetrate the two front wheel frame mounting plate fixing holes (222) and the two front wheel frame lower fixing holes (112) and enter the front wheel frame lower fixing hole shaft sleeve (1121), and the support shaft (4) can be fixed to the front wheel frame (2) and the wall plate (11) through the support shaft fixing pin (41), and the front wheel frame (2) and the wall plate (11) are fixedly connected again.

6. The improved folding horizontal jack as claimed in claim 1 wherein: The rear wheel frame (3) is also an integral frame structure with a "П" shape structure, and the rear wheel frame (3) has a rear wheel frame connecting plate (31) and two rear wheel frame mounting plates (32) respectively formed at the length direction ends of the rear wheel frame connecting plate (31); wherein the two rear wheel frame mounting plates (32) are respectively arranged on the outer side surfaces of the corresponding wall plates (11), the length direction ends of the wall plate rear hinging shafts (7) respectively pass through the two side wall plates (11) and the corresponding rear wheel frame mounting plates (32), and a rear wheel frame mounting plate hinging bolt (321) is arranged on each of the two rear wheel frame mounting plates (32), and the two rear wheel frame mounting plate hinging bolts (321) are respectively arranged on the length direction ends of the wall plate rear hinging shafts (7) which pass through the wall plates (11), so as to realize the rotary connection between the two rear wheel frame mounting plates (32) and the corresponding wall plates (11), and the rotary connection between the rear wheel frame (3) and the rack module (1).

7. An improved folding horizontal jack as claimed in claim 6 wherein: The rear wheel frame (3) is provided with two rear wheel frame mounting plates (32), and a rear wheel frame mounting plate fixing hole (322) is formed in each of the two rear wheel frame mounting plates (32) and corresponds to the upper position of the length direction of the rear wheel frame mounting plate (32). The rear wheel frame mounting plate fixing hole (322) penetrates the thickness direction of the rear wheel frame mounting plate (32). A rear wheel frame upper fixing hole (113) is formed in the upper position of the length direction of the wall plate (11) near the rear end of the rear wheel frame (3), and a rear wheel frame lower fixing hole (114) is formed in the lower position of the length direction of the wall plate (11) near the rear end of the rear wheel frame (3). The support shaft (4) can penetrate the rear wheel frame mounting plate fixing holes (322) of the two rear wheel frame mounting plates (32), and a support shaft fixing pin (41) is arranged on the support shaft (4). When the rack module (1) is in a low position, the length direction of the rear wheel frame mounting plate (32) is parallel to the length direction of the wall plate (11), the support shaft (4) can penetrate the two rear wheel frame mounting plate fixing holes (322) and the two rear wheel frame upper fixing holes (113), and the support shaft (4) can be fixed to the rear wheel frame (3) and the wall plate (11) through the support shaft fixing pin (41), so as to realize the fixed connection between the rear wheel frame (3) and the wall plate (11). When the rack module (1) is in a high position, the rear wheel frame (3) can be flipped downward, the rear wheel frame mounting plate fixing holes (322) can be moved to the positions corresponding to the rear wheel frame lower fixing holes (114), the support shaft (4) can penetrate the two rear wheel frame mounting plate fixing holes (322) and the two rear wheel frame lower fixing holes (114), and the support shaft (4) can be fixed to the rear wheel frame (3) and the wall plate (11) through the support shaft fixing pin (41), so as to realize the fixed connection between the rear wheel frame (3) and the wall plate (11) again.

8. The improved folding horizontal jack as claimed in claim 1 wherein: The limiting member (5) extends out of the wall plate (11), and the length of the limiting member (5) extending out of the wall plate (11) matches the thickness of the front wheel frame (2) and the rear wheel frame (3) to limit the position of the front wheel frame (2) and the rear wheel frame (3).

9. The improved folding horizontal jack as claimed in claim 1 wherein: A lifting arm (14) is arranged between the two wall plates (11), and the lifting arm (14) is hinged to the two wall plates (11). An lifting bracket (15) is arranged at one end of the length direction of the lifting arm (14), and a knob (8) is connected to the other end of the length direction of the lifting arm (14). The knob (8) can drive the lifting arm (14) to move through a hydraulic assembly.

10. The improved folding horizontal jack as claimed in claim 1, wherein: A pair of front wheels (23) are arranged on both sides of the front wheel frame (2), and the two front wheels (23) are symmetrically connected to the front wheel frame (2) and can be supported on a horizontal plane, and the bottom end of the front wheel (23) is lower than the bottom of the front wheel frame (2); a pair of rear wheels (33) are arranged on both sides of the rear wheel frame (3), and the two rear wheels (33) are symmetrically connected to the rear wheel frame (3) and can be supported on a horizontal plane, and the bottom end of the rear wheel (33) is lower than the bottom of the rear wheel frame (3).

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