Jack with safety function

Abstract

A jack with safety belongs to the technical field of jacks. Which comprises a cargo boom component used for jacking a heavy object and a pair of wallboard components arranged on the two sides of the cargo boom component, and is characterized in that rack holes are formed in the corresponding positions of the pair of wallboard components, the jack further comprises a safety component, the safety component comprises a pair of supporting rods and a safety shaft, and the two ends of the safety shaft are fixed to the pair of supporting rods respectively; the pair of supporting rods are rotationally installed on the cargo boom component, the safety shaft is matched with a rack hole of the wallboard component, when the cargo boom component is lifted, the safety shaft moves along teeth on the rack hole, and the teeth on the rack hole do not stop the safety shaft; after the lifting of the cargo boom component is finished, in the load bearing process, the safety shaft is meshed with the teeth in the rack hole, and the teeth on the rack hole stop the safety shaft, so that the safety shaft cannot move. The safety device has the advantages that the safety shaft of the safety component is meshed with the teeth in the rack hole of the wallboard component, so that the cargo boom component is prevented from falling, and the cargo boom component is safely fixed at a required position.

Description

Technical Field

[0001] The utility model belongs to the technical field of jacks, and in particular relates to a jack with a safety. Background Art

[0002] With the popularity of vehicles in life, people often encounter a series of problems when using cars, such as tire blowouts, chassis failures, etc. At this time, the car needs to be lifted to a certain height. A jack is a structure specially used to lift heavy objects. Due to its convenient movement and simple operation, it is widely used in various industries, especially for vehicle maintenance. It is an essential tool. However, there are still some shortcomings when using existing jacks: the lifting arm components of the jack will bear a large load during use, and sometimes the lifting arm components will fall instantly due to failure or damage of certain components of the jack, causing safety accidents.

[0003] In view of the above-mentioned prior art, it is necessary to reasonably improve the existing jack structure so that the lifted heavy object is safely fixed in the required position. For this reason, the applicant has made a useful design, and the technical solution to be introduced below is produced under this background. Utility Model Content

[0004] The task of the utility model is to provide a jack with insurance, which blocks the falling of the boom component through the engagement of the safety shaft of the insurance component with the rack hole of the wall panel component, so as to ensure that the boom component is safely fixed in the required position.

[0005] The task of the utility model is accomplished in this way. A jack with insurance includes a boom component for lifting heavy objects and a pair of wall panel components arranged on both sides of the boom component. The characteristics are: rack holes are opened at corresponding positions of the pair of wall panel components, and the jack also includes an insurance component, which includes a pair of struts and a safety shaft with two ends respectively fixed on the pair of struts, the pair of struts are rotatably installed on the boom component, the safety shaft cooperates with the rack hole of the wall panel component, when the boom component is lifted, the safety shaft moves along the teeth on the rack hole, and the teeth on the rack hole do not stop the safety shaft; when the boom component is lifted, in the process of supporting the load, the safety shaft meshes with the teeth in the rack hole, and the teeth on the rack hole stop the safety shaft, so that the safety shaft cannot move.

[0006] In a specific embodiment of the present invention, the safety component further includes a support shaft with both ends fixed to a pair of struts, a support hole is provided on the boom component, and the support shaft is inserted into the support hole of the boom component.

[0007] In another specific embodiment of the utility model, a support sleeve is provided in the support hole of the boom component, the support shaft is passed through the support sleeve and is loosely matched with the support sleeve, and after passing through the support sleeve, both ends of the support shaft pass through the support rod respectively and are stopped and fixed by stoppers.

[0008] In another specific embodiment of the present invention, the stopper is a retaining ring, a torsion spring latch or an O-shaped latch.

[0009] In another specific embodiment of the utility model, the teeth in the rack hole are evenly distributed or unevenly distributed, and the structure of each tooth includes a tooth top surface, a tooth bottom, a first tooth-shaped surface extending from both sides of the tooth top surface to the tooth bottom, and a second tooth-shaped surface, wherein the second tooth-shaped surface is located on the side close to the supporting shaft, and the second tooth-shaped surface effectively blocks the safety shaft, and the tooth-shaped angle α of the first tooth-shaped surface is conducive to the smooth sliding of the safety shaft and takes into account the strength of the tooth.

[0010] In another specific embodiment of the present invention, the pair of struts are arranged on the two outer sides of the boom component and on the inner side of a pair of wall panel components, and the two ends of the safety axis pass through the holes on the pair of struts and are placed in the rack holes of a pair of wall panel components.

[0011] In a further specific embodiment of the present invention, the safety component further comprises a handle and a lever, wherein the lever has a pair and is symmetrically arranged at both ends of the handle, one end of each lever is inserted into the end of the handle, and the other end is fixedly connected to the support rod.

[0012] In a more specific embodiment of the present invention, the other end of the shifting rod is inserted into the groove at the end of the support rod and is fixed to the support rod by welding.

[0013] In yet another specific embodiment of the present invention, the pair of wall panel components include a left wall panel component and a right wall panel component symmetrically arranged on both sides of the boom component, the left wall panel component includes a left wall panel and a left wheel frame, the left wheel frame is welded to the outer side surface of the left wall panel, and a rack hole is provided on the left wall panel; the right wall panel component includes a right wall panel and a right wheel frame, the right wheel frame is welded to the outer side surface of the right wall panel, and a rack hole is provided on the right wall panel.

[0014] In yet another specific embodiment of the present invention, the left wall panel component also includes a left reinforcing plate, the upper and lower sides of the left reinforcing plate are processed into left flanges, and a left middle groove plate is formed in the middle, a rack hole is opened on the left middle groove plate, the left wall panel is inserted between the two left flanges of the left reinforcing plate and fits with the surface of the left middle groove plate, and the rack hole on the left reinforcing plate is aligned with the rack hole opened on the left wall panel; the right wall panel component also includes a right reinforcing plate, the upper and lower sides of the right reinforcing plate are processed into right flanges, and a right middle groove plate is formed in the middle, a rack hole is opened on the right middle groove plate, the right wall panel is inserted between the two right flanges of the right reinforcing plate and fits with the surface of the right middle groove plate, and the rack hole on the right reinforcing plate is aligned with the rack hole opened on the right wall panel.

[0015] The utility model has the following beneficial effects due to the adoption of the above structure: first, the safety component is arranged between the wall panel component and the boom component. If an important component of the jack fails, the safety shaft of the safety component is engaged with the rack hole of the wall panel component, so that the safety component can effectively support the boom component and prevent the boom component from falling, thereby achieving the purpose of ensuring that the boom component is safely fixed in a required position. The structural design is ingenious, which does not affect the rise of the boom component and adds a strong guarantee for the boom component to bear heavy objects; second, when bearing heavy objects, the safety shaft in the safety component abuts against the rack hole of the wall panel component composed of two plates, and is supported by a pair of struts, so the force is balanced, the stability is high, and the safety is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a top view of the jack of the utility model in the lifting state;

[0017] Figure 2 for Figure 1 AA section view in;

[0018] Figure 3 for Figure 2 A magnified schematic diagram of part B;

[0019] Figure 4 It is a structural schematic diagram of the lifting arm components of the utility model;

[0020] Figure 5 for Figure 4 CC section view in;

[0021] Figure 6 It is an exploded schematic diagram of the safety component of the utility model;

[0022] Figure 7 A three-dimensional diagram of a pair of wall panel components according to the utility model;

[0023] Figure 8It is an exploded schematic diagram of a pair of wall panel components described in the present invention.

[0024] In the figure: 1. boom component, 11. support hole, 111. support sleeve, 12. bracket component; 2. insurance component, 21. support rod, 211. groove, 22. support shaft, 23. safety shaft, 24. handle, 25. lever, 26. retaining ring; 3. left wall panel component, 31. left reinforcing plate, 311. left flange, 312. left middle groove plate, 32. left wall panel, 33. left wheel frame; 4. right wall panel component, 41. right reinforcing plate, 42. right wall panel, 43. right wheel frame; 5. rack hole, 51. tooth top surface, 52. tooth bottom, 53. first tooth profile surface, 54. second tooth profile surface; 6. hydraulic component; 7. press handle; 8. front wheel; 9. rear wheel; 10. positioning block. DETAILED DESCRIPTION

[0025] The specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings, but the description of the embodiments is not a limitation of the technical solution. Any changes in form rather than substance based on the concept of the present invention should be regarded as the protection scope of the present invention.

[0026] In the following description, all concepts related to directionality or orientation such as up, down, left, right, front and back are based on the positions shown in the corresponding drawings. They are only used to facilitate the description of the technical solution provided by the utility model and simplify the description in conjunction with the drawings, and therefore cannot be understood as a special limitation on the technical solution provided by the utility model.

[0027] See also Figures 1 to 4 The utility model relates to a jack with insurance, comprising a boom component 1 for lifting heavy objects, an insurance component 2 and a pair of wall panel components arranged on both sides of the boom component 1, rack holes 5 are opened at corresponding positions of the pair of wall panel components, the boom component 1 is provided with a supporting hole 11, the insurance component 2 comprises a pair of struts 21, a supporting shaft 22 and a safety shaft 23, both ends of which are respectively fixed on the pair of struts 21, the supporting shaft 22 is inserted into the supporting hole 11 of the boom component 1, and the safety shaft 23 is matched with the rack hole 5 in the wall panel component. When the boom component 1 is lifted, the safety shaft 23 moves along the teeth on the rack hole 5, and the teeth on the rack hole 5 do not stop the safety shaft 23; when the boom component 1 is lifted, in the process of supporting the load, the safety shaft 23 meshes with the rack hole 5, and the teeth on the rack hole 5 stop the safety shaft 23, and the safety shaft 23 cannot move.

[0028] like Figure 2As shown, a bracket component 12 is provided at the front end of the length direction of the boom component 1, and the boom component 1 performs a lifting action under the action of the hydraulic component 6 and the lever 7. The structures of the hydraulic component 6 and the lever 7 belong to the prior art, and their installation positions and specific structural features are not described in detail in this application.

[0029] like Figure 2 , Figure 3 As shown, the teeth in the rack hole 5 are evenly distributed or unevenly distributed, and the structure of each tooth includes a tooth top surface 51, a tooth bottom 52, a first tooth-shaped surface 53 and a second tooth-shaped surface 54 extending from both sides of the tooth top surface 51 to the tooth bottom 52. The second tooth-shaped surface 54 is located on the side close to the supporting shaft 22, and the second tooth-shaped surface 54 effectively blocks the safety shaft 23. The tooth angle α of the first tooth-shaped surface 53 is conducive to the smooth sliding of the safety shaft 23 and takes into account the strength of the tooth.

[0030] like Figure 4 , Figure 5 , Figure 6 As shown, a support sleeve 111 is provided in the support hole 11 of the boom component 1, and the support shaft 22 is inserted into the support sleeve 111 and is loosely matched with the support sleeve 111. After passing through the support sleeve 111, the two ends of the support shaft 22 pass through the support rod 21 respectively and are stopped and fixed by a retaining ring 26. The retaining ring 26 can be replaced with a stopper such as a torsion spring latch or an O-shaped latch. The support shaft 22 and the support sleeve 111 in the boom component 1 can be combined into one, that is, the pair of support rods 21 are directly rotatably arranged with the boom component 1, and the rise and fall of the boom component 1 drive the pair of support rods 21 to move.

[0031] like Figure 1 As shown, the pair of support rods 21 are arranged on the two outer sides of the boom component 1 and on the inner sides of the pair of wall panel components. The two ends of the safety shaft 23 pass through the holes on the pair of support rods 21 and then rest in the rack holes 5 of the pair of wall panel components.

[0032] like Figure 2 , Figure 6 As shown, the safety component 2 also includes a handle 24 and a lever 25. The lever 25 has a pair of levers 25 and is symmetrically arranged at both ends of the handle 24. One end of each lever 25 is inserted into the end of the handle 24, and the other end is fixedly connected to the support rod 21. The connection method can be electric welding, threaded connection, and fastening with fasteners. In this embodiment, the other end of the lever 25 is inserted into the groove 211 at the end of the support rod 21, and is fixed to the support rod 21 by welding.

[0033] like Figure 1 , Figure 7 , Figure 8As shown, the pair of wall panel components include a left wall panel component 3 and a right wall panel component 4 symmetrically arranged on both sides of the boom component 1, and the rack holes 5 on the left wall panel component 3 and the rack holes 5 on the right wall panel component 4 are symmetrically arranged, respectively for the two ends of the safety shaft 23 to rest. Specifically, the left wall panel component 3 includes a left reinforcing plate 31, a left wall panel 32 and a left wheel frame 33, and the left wheel frame 33 is welded to the outer side of the left wall panel 32, and the upper and lower sides of the left reinforcing plate 31 are processed into a left flange 311, and the middle part forms a left middle groove plate 312, and the left middle groove plate 312 is provided with a rack hole 5, and the left wall panel 32 is inserted between the two left flanges 311 of the left reinforcing plate 31 and fits the surface of the left middle groove plate 312, and the rack hole 5 on the left reinforcing plate 31 is aligned with the rack hole 5 opened on the left wall panel 32, and the left wall panel 32 and the left reinforcing plate 31 can be fixedly connected by electric welding or fasteners.

[0034] The right wall panel component 4 includes a right reinforcing plate 41, a right wall panel 42 and a right wheel frame 43, and the right reinforcing plate 41, the right wall panel 42 and the right wheel frame 43 are symmetrically arranged with the left reinforcing plate 31, the left wall panel 32 and the left wheel frame 33, respectively. Therefore, the right wheel frame 43 is welded to the outer side of the right wall panel 42, the upper and lower sides of the right reinforcing plate 41 are processed into right flanges 411, and the middle part forms a right middle groove plate 412, and the right middle groove plate 412 is provided with a rack hole 5, the right wall panel 42 is inserted between the two right flanges 411 of the right reinforcing plate 41 and fits with the surface of the right middle groove plate 412, the rack hole 5 on the right reinforcing plate 41 is aligned with the rack hole 5 opened on the right wall panel 42, and the right wall panel 42 and the right reinforcing plate 41 can be fixedly connected by electric welding or fasteners.

[0035] The left wall panel component 3 and the right wall panel component 4 are symmetrically provided with positioning blocks 10, and the positioning blocks 10 are used to block the hydraulic component 6. The positioning blocks 10 on the left wall panel component 3 are welded to the left wall panel 32, and the positioning blocks 10 on the right wall panel component 4 are welded to the right wall panel 42.

[0036] The end of the left wall panel 32 extending out of the left reinforcing plate 31 and the end of the right wall panel 42 extending out of the right reinforcing plate 41 are used to install the front wheel 8 of the jack. The left wheel frame 33 and the right wheel frame 43 are used to install the rear wheel 9 of the jack. In this technical solution, the left reinforcing plate 31 and the right reinforcing plate 41 with the rack hole 5 can also be omitted. The left reinforcing plate 31 and the right reinforcing plate 41 make the wall panel component have a better load-bearing capacity.

[0037] Please continue reading Figure 1 , Figure 2 , Figure 3 The working principle of the jack with insurance described in the utility model is:

[0038] During the lifting process of the jack, the handle (not shown in the figure) inserted into the pressing handle 7 is repeatedly pressed down to control the hydraulic component 6, thereby driving the lifting arm component 1 to rotate and lift, and at the same time driving the supporting shaft 22 to lift, and the supporting shaft 22 performs a rotary motion in the supporting hole 11. The lifting of the supporting shaft 22 drives the support rod 21, and the support rod 21 drags the safety shaft 23 to perform a wave motion along the tooth shape in the rack hole 5 in the wall panel component 1. Since the tooth top surface 51 of the rack hole 5 is an inclined surface with a large tooth shape angle α, the safety shaft 23 can smoothly pass over each tooth in the rack hole 5, so that the smoothness of the jack during the lifting process can be ensured;

[0039] In the process of bearing the load, the safety shaft 23 abuts against the second tooth-shaped surface 54 of the rack hole 5, preventing the safety shaft 23 from passing over the teeth of the rack hole 5. The blocking of the second tooth-shaped surface 54 reacts on the safety component 2, so that the safety component 2 effectively supports the boom component 1, ensuring that the boom component 1 is safely fixed in a suitable position, that is, the load such as the car is safely supported in the required position;

[0040] When lowering the boom component 1, first press the handle 24 at one end of the safety component 2 to drive the support rod 21 to rotate, so that the safety shaft 23 is tilted and leaves the teeth in the rack hole 5, and then the boom component 1 is lowered. Without the stop of the teeth in the rack hole 5, the boom component 1 can be lowered smoothly.

Claims

1. A jack with a safety device, comprising a lifting arm component (1) for lifting a heavy object, and a pair of wall panel components arranged on both sides of the lifting arm component (1), characterized in that: The pair of wall panel components are provided with rack holes (5) at corresponding positions. The jack also includes a safety component (2). The safety component (2) includes a pair of support rods (21) and a safety shaft (23) with two ends respectively fixed to the pair of support rods (21). The pair of support rods (21) are rotatably mounted on the boom component (1). The safety shaft (23) cooperates with the rack hole (5) of the wall panel component. When the boom component (1) is lifted, the safety shaft (23) moves along the teeth on the rack hole (5), and the teeth on the rack hole (5) do not stop the safety shaft (23). When the boom component (1) is lifted, in the process of supporting the load, the safety shaft (23) meshes with the teeth in the rack hole (5), and the teeth on the rack hole (5) stop the safety shaft (23), so that the safety shaft (23) cannot move.

2. A jack with insurance according to claim 1, characterized in that: The safety component (2) further comprises a support shaft (22) with both ends fixed to a pair of support rods (21); a support hole (11) is provided on the boom component (1), and the support shaft (22) is inserted into the support hole (11) of the boom component.

3. A jack with insurance according to claim 2, characterized in that: A support sleeve (111) is provided in the support hole (11) of the boom component (1), the support shaft (22) is inserted into the support sleeve (111) and is clearance-matched with the support sleeve (111), and both ends of the support shaft (22) respectively pass through the support rod (21) after passing through the support sleeve (111) and are then stopped and fixed by a stopper.

4. A jack with insurance according to claim 3, characterized in that: The stopper is a retaining ring (26), a torsion spring latch or an O-shaped latch.

5. A jack with insurance according to claim 1, characterized in that: The teeth in the rack hole (5) are evenly distributed or unevenly distributed, and the structure of each tooth includes a tooth top surface (51), a tooth bottom (52), a first tooth profile surface (53) extending from both sides of the tooth top surface (51) to the tooth bottom, and a second tooth profile surface (54), wherein the second tooth profile surface (54) is located on a side close to the support shaft (22), and the second tooth profile surface (54) effectively blocks the safety shaft (23), and the tooth profile angle α of the first tooth profile surface (53) is conducive to the smooth sliding of the safety shaft (23) and takes into account the strength of the tooth.

6. A jack with insurance according to claim 1, characterized in that: The pair of support rods (21) are arranged on the two outer sides of the boom component (1) and on the inner sides of the pair of wall panel components. The two ends of the safety shaft (23) pass through the holes on the pair of support rods (21) and are then placed in the rack holes (5) of the pair of wall panel components.

7. A jack with a safety device according to claim 1, characterized in that: The safety component (2) further comprises a handle (24) and a lever (25). The lever (25) comprises a pair of levers symmetrically arranged at the two ends of the handle (24). One end of each lever (25) is inserted into the end of the handle (24), and the other end is fixedly connected to the support rod (21).

8. A jack with a safety device according to claim 7, characterized in that: The other end of the shifting rod (25) is inserted into the groove (211) at the end of the support rod (21) and is fixed to the support rod (21) by welding.

9. A jack with insurance according to claim 1, characterized in that: The pair of wall panel components comprises a left wall panel component (3) and a right wall panel component (4) symmetrically arranged on both sides of the boom component (1); the left wall panel component (3) comprises a left wall panel (32) and a left wheel frame (33); the left wheel frame (33) is welded to the outer side surface of the left wall panel (32); and a rack hole (5) is provided on the left wall panel (32); the right wall panel component (4) comprises a right wall panel (42) and a right wheel frame (43); the right wheel frame (43) is welded to the outer side surface of the right wall panel (42); and a rack hole (5) is provided on the right wall panel (42).

10. A jack with insurance according to claim 9, characterized in that: The left wall panel component (3) also includes a left reinforcing plate (31), the upper and lower sides of the left reinforcing plate (31) are processed into left flanges (311), and a left middle groove plate (312) is formed in the middle, a rack hole (5) is provided on the left middle groove plate (312), the left wall panel (32) is inserted between the two left flanges (311) of the left reinforcing plate (31) and is in contact with the surface of the left middle groove plate (312), and the rack hole (5) on the left reinforcing plate (31) is aligned with the rack hole (5) provided on the left wall panel (32); The right wall panel component (4) also includes a right reinforcing plate (41), the upper and lower sides of the right reinforcing plate (41) are processed into right flanges (411), and a right middle groove plate (412) is formed in the middle, and a rack hole (5) is provided on the right middle groove plate (412). The right wall panel (42) is inserted between the two right flanges (411) of the right reinforcing plate (41) and is in contact with the surface of the right middle groove plate (412), and the rack hole (5) on the right reinforcing plate (41) is aligned with the rack hole (5) provided on the right wall panel (42).

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