Scissor jack

Abstract

The utility model discloses a scissor jack and belongs to the technical field of jacking devices. Comprising a base, a jack body and an ejector head, the jack body comprises a pair of lower supporting arms and a pair of upper supporting arms, the lower ends of the pair of lower supporting arms are hinged to the base, the upper ends of the pair of upper supporting arms are hinged to the ejector head, the lower supporting arms are provided with a pair of lower supporting arm side edges which are parallel to each other, and the lower supporting arms are connected with the ejector head. The upper supporting arm is provided with a pair of lower supporting arm side edges, the upper ends of the pair of lower supporting arm side edges are folded face to face and extend to form a pair of lower supporting arm folded edges, and the lower ends of the pair of lower supporting arm folded edges are connected in a meshed mode through a lower supporting arm left tooth part and a lower supporting arm right tooth part. The lower end faces of the pair of upper supporting arm side edges are folded and extend oppositely to form a pair of upper supporting arm folded edges. The lifting jack has the advantages that the loading capacity is improved, the safety performance is further optimized, the use of a vehicle with a higher chassis is met, the cost is reduced, and the cost performance of the lifting jack is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the top lifting device technical field, specifically relates to a scissor jack. BACKGROUND

[0002] Scissor jack, because the appearance is like scissors and gets the name, various series of small and medium-sized cars often have scissor jack for vehicle maintenance and tire replacement in emergency conditions. Scissor jack mainly includes base, top head and jack body hinged between base and top head, by top head and vehicle lifting point cooperation, through manual operation of rocker within the stroke to lift or support the vehicle.

[0003] However, scissor jack has the characteristics of single structure and strong single matching for certain vehicle type, that is, the vehicle-mounted scissor jack is only applicable to the vehicle type, and the application parameters cannot meet the use conditions of other vehicles.

[0004] In recent years, electric vehicles have gradually become the preferred means of transportation for people because of their environmental protection, simple driving and other advantages. Due to the core battery components, electric vehicles are usually heavier than equivalent fuel vehicles, especially the increasing popularity of large electric SUVs, the overall weight of many electric vehicles on the market has broken through 2T (tons). The load requirement of traditional fuel vehicle scissor jack is generally 1.2T, and the maximum height is 400mm. Obviously, the scissor jack for electric vehicles needs to have heavier load requirements.

[0005] In addition, the height range of the traditional scissor jack is fixed, and the maximum height often cannot meet the lifting requirements of vehicles with different chassis heights and electric vehicles with further lifting height requirements. The lifting height of the traditional high scissor jack is often increased by increasing the related geometric dimensions of each part of the jack body including the support arm length, but this method undoubtedly increases the cost.

[0006] In view of the above prior art, it is urgent to improve the structure of the existing scissor jack to have heavier load capacity and higher stroke height to meet the application of electric vehicles. For this purpose, the applicant has made a beneficial design, and the technical scheme to be introduced below is generated in this background. CONTENT OF THE UTILITY MODEL

[0007] The utility model aims at providing a scissor jack with improved load capacity, stable and safe lifting process, and increased maximum height to expand the application range.

[0008] The utility model discloses a shearing jack which comprises a base, a jack body and a top head.

[0009] In one embodiment of the utility model, the top head comprises a pair of support plates and a pair of fixed plates. The support plates are located above the fixed plates and extend towards the front and back of the fixed plates.

[0010] In another embodiment of the utility model, the top head is connected to the top of the pair of fixed plates by a support plate.

[0011] In yet another embodiment of the utility model, the shearing jack further comprises a pair of lower support arm pins and a pair of upper support arm pins. The lower support arm pins are respectively arranged at the lower ends of the pair of lower support arms. The front and back ends of the pair of lower support arm pins pass through the pair of lower support arm sides and are respectively connected to the front and back sides of the base. The upper support arm pins are respectively arranged at the upper ends of the pair of upper support arms. The front and back ends of the pair of upper support arm pins pass through the pair of upper support arm folds and are respectively connected to the pair of fixed plates.

[0012] In still another specific embodiment of the utility model, the lower support arm left tooth part of the pair of lower support arms is distributed around one of the pair of lower support arm pins, and a lower support arm left tooth groove is formed between the adjacent two lower support arm left tooth parts, the lower support arm right tooth part of the pair of lower support arms is distributed around the other lower support arm pin and is meshed with the lower support arm left tooth groove, and a lower support arm right tooth groove which is meshed with the lower support arm left tooth part is formed between the adjacent two lower support arm right tooth parts; the upper support arm left tooth part of the pair of upper support arms is distributed around one of the pair of upper support arm pins, and an upper support arm left tooth groove is formed between the adjacent two upper support arm left tooth parts, the upper support arm right tooth part of the pair of upper support arms is distributed around the other upper support arm pin and is meshed with the upper support arm left tooth groove, and an upper support arm right tooth groove which is meshed with the upper support arm left tooth part is formed between the adjacent two upper support arm right tooth parts.

[0013] In still another specific embodiment of the utility model, the pair of lower support arms is formed by folding the front and rear side edges of the pair of lower support arms upwards, and the pair of upper support arms is formed by folding the front and rear side edges of the pair of upper support arms downwards.

[0014] In still another specific embodiment of the utility model, the pair of lower support arms and the pair of upper support arms are formed by folding the front and rear side edges of the pair of lower support arms upwards and the front and rear side edges of the pair of upper support arms downwards.

[0015] In still another specific embodiment of the utility model, the pair of lower support arms and the pair of upper support arms are formed by folding the front and rear side edges of the pair of lower support arms upwards and the front and rear side edges of the pair of upper support arms downwards.

[0016] In the utility model, the upper ends of the pair of upper support arms and the lower ends of the pair of lower support arms are connected by the meshing structure, and the meshed tooth parts have a certain width, so that the support strength of the support arm is increased, the meshing structure is not prone to dislocation and tilting during the jacking process, the jacking of the jack is stable, and deformation and damage caused by the action of the eccentric load are avoided; meanwhile, the support surface of the top head is increased, the load capacity of the scissors jack is improved, and the safety performance is further optimized; the jacking height of the served vehicle is improved, the use of the higher chassis vehicle is met, the application range is expanded on the basis of the basic scissors jack, the cost is reduced, and the performance-price ratio of the jack is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1The overall structure schematic view of the utility model;

[0018] Figure 2 The structure schematic view of the jack body of the utility model;

[0019] Figure 3 The structure schematic view of the rocker of the utility model;

[0020] Figure 4 The application example schematic view of the utility model.

[0021] In the figure: 1. base, 2. jack body, 21. lower support arm, 211. lower support arm side edge, 212. lower support arm folded edge, 2121. lower support arm left tooth part, 2122. lower support arm right tooth part, 2123. lower support arm left tooth groove, 2124. lower support arm right tooth groove, 22. upper support arm, 221. upper support arm side edge, 222. upper support arm folded edge, 2221. upper support arm left tooth part, 2222. upper support arm right tooth part, 2223. upper support arm left tooth groove, 2224. upper support arm right tooth groove, 23. right end hinged shaft, 24. screw rod, 241. connecting hole, 25. left end hinged shaft; 3. top head, 31. fixed plate, 32. support plate; 4. lower support arm pin shaft; 5. upper support arm pin shaft; 6. rocker, 61. hook part. DETAILED DESCRIPTION

[0022] The specific embodiments of the utility model are described in detail below in combination with the drawings, but the description of the embodiments is not the limitation of the technical scheme, and any form but not substantial change according to the utility model concept should be regarded as the protection scope of the utility model.

[0023] In the following description, the concepts of directionality (or directionality) of up, down, left, right, front and back are for the position state of the figure being described, and the purpose is to facilitate the public to understand, so it cannot be understood as the special limitation of the technical scheme provided by the utility model.

[0024] Please refer to Figures 1 to 4This utility model relates to a scissor jack, comprising a base 1, a jack body 2, and a jack head 3. The jack body 2 includes a pair of lower support arms 21 and a pair of upper support arms 22. The lower ends of the lower support arms 21 are hinged to the base 1 via a pair of lower support arm pins 4, and the upper ends of the upper support arms 22 are hinged to the jack head 3 via a pair of upper support arm pins 5. The jack body 2 also includes a left-end hinge shaft 25, a right-end hinge shaft 23, and a lead screw 24. The upper ends of the lower support arms 21 and the lower ends of the upper support arms 22 are respectively hinged via the left-end hinge shaft 25 and the right-end hinge shaft 23. The lead screw 24 passes through the right-end hinge shaft 23 and the left-end hinge shaft 25 from right to left and is threadedly connected to the left-end hinge shaft 25. The lead screw 24's connecting hole 241 is connected to the hook 61 of the rocker arm 6, and rotates with the rotation of the rocker arm 6, thereby adjusting the height position of the top head 3 relative to the base 1, and realizing the lifting or lowering of the service vehicle.

[0025] The jack 3 includes a fixed plate 31 and a support plate 32. The fixed plates 31 are a pair, located on the front and rear sides of a pair of upper support arms 22. The support plate 32 is located above the pair of fixed plates 31 and extends in the front-rear direction towards them. This structure of the jack 3 increases the load-bearing capacity of the scissor jack by enlarging the support surface, further optimizing its safety performance.

[0026] Specifically, such as Figure 2 As shown, there is a pair of top heads 3, which are formed by a fixed plate 31 and a support plate 32 connected to the top of the fixed plate 31 in an inverted L-shape. In this embodiment, the pair of support plates 32 are formed by bending and extending the upper ends of the pair of fixed plates 31 backwards and forwards respectively. In addition, the top head 3 also adopts an integral structure (not shown), which is formed by a support plate 22 connected to the top of the pair of fixed plates 31.

[0027] See you later Figure 1 and Figure 2 The front and rear sides of the pair of lower support arms 21 are folded upwards parallel to each other to form a pair of lower support arm sides 211. The upper ends of the pair of lower support arm sides 211 are folded and extended face-to-face to form a pair of lower support arm flanges 212. The lower ends of the pair of lower support arm flanges 212 are engaged and connected by the left tooth portion 2121 and the right tooth portion 2122 of the lower support arm. The front and rear sides of the pair of upper support arms 22 are folded downwards parallel to each other to form a pair of upper support arm sides 221. The lower ends of the pair of upper support arm sides 221 are folded and extended face-to-face to form a pair of upper support arm flanges 222. The upper ends of the pair of upper support arm flanges 222 are engaged and connected by the left tooth portion 2221 and the right tooth portion 2222 of the upper support arm.

[0028] Further, continue to see Figure 2 The pair of lower support arm pin shafts 4 are respectively arranged at the lower ends of the pair of lower support arms 21, and the front and rear ends of the pair of lower support arm pin shafts 4 are respectively connected to the front and rear sides of the base 1 after passing through the pair of lower support arm side edges 211. The pair of upper support arm pin shafts 5 are respectively arranged at the upper ends of the pair of upper support arms 22, and the front and rear ends of the pair of upper support arm pin shafts 5 are respectively connected to the pair of fixed plates 31 after passing through the pair of upper support arm folded edges 222.

[0029] Specifically, the lower support arm left tooth portions 2121 are spaced around one of the pair of lower support arm pin shafts 4, and a lower support arm left tooth groove 2123 is formed between adjacent two lower support arm left tooth portions 2121. The lower support arm right tooth portions 2122 are spaced around the other lower support arm pin shaft 4 and are engaged with the lower support arm left tooth grooves 2123, and a lower support arm right tooth groove 2124 engaged with the lower support arm left tooth portions 2121 is formed between adjacent two lower support arm right tooth portions 2122. The upper support arm left tooth portions 2221 are spaced around one of the pair of upper support arm pin shafts 5, and an upper support arm left tooth groove 2223 is formed between adjacent two upper support arm left tooth portions 2221. The upper support arm right tooth portions 2222 are spaced around the other upper support arm pin shaft 5 and are engaged with the upper support arm left tooth grooves 2223, and an upper support arm right tooth groove 2224 engaged with the upper support arm left tooth portions 2221 is formed between adjacent two upper support arm right tooth portions 2222. In application, a proper number of lower support arm tooth portions and upper support arm tooth portions are selected according to actual conditions.

[0030] Further, the thickness of the pair of lower support arms 21 and the pair of upper support arms 22 is preferably 2.8-3.2 mm, and is preferably 3 mm in the embodiment, further ensuring the supporting capacity of the support arms.

[0031] In the above structure, the meshing structure is formed on the pair of lower support arm folded edges 212 and the pair of upper support arm folded edges 222, so that the meshing tooth portions have a certain width, thereby not only increasing the supporting strength of the support arms but also ensuring that the meshing structure is not prone to dislocation, tilting and the like during the jacking process, ensuring the stable jacking of the jack and preventing deformation and damage due to the action of the eccentric load. It has been verified that the structure of the embodiment can be suitable for the configuration of a shear type jack with a load requirement of 2.5T, and the maximum jacking height can reach 610 mm, so that the improved shear type jack can not only serve large space fuel vehicles but also serve electric SUVs and the like, greatly expanding the application range and achieving the purpose of invention.

Claims

1. A scissors jack comprising a base (1), a jack body (2) and a ram (3), said jack body (2) comprising a pair of lower support arms (21) and a pair of upper support arms (22), the lower ends of said pair of lower support arms (21) being hingedly connected to the base (1), the upper ends of said pair of upper support arms (22) being hingedly connected to the ram (3), characterised in that: The lower support arm (21) has a pair of parallel lower support arm side edges (211), the upper ends of the pair of lower support arm side edges (211) are folded to form a pair of lower support arm folded edges (212), the lower ends of the pair of lower support arm folded edges (212) are connected by a lower support arm left tooth portion (2121) and a lower support arm right tooth portion (2122), the upper support arm (22) has a pair of parallel upper support arm side edges (221), the lower ends of the pair of upper support arm side edges (221) are folded to form a pair of upper support arm folded edges (222), the upper ends of the pair of upper support arm folded edges (222) are connected by an upper support arm left tooth portion (2221) and an upper support arm right tooth portion (2222), the top head (3) includes a fixed plate (31) and a support plate (32), the fixed plate (31) has a pair of and is arranged on the front and rear sides of the pair of upper support arms (22), the support plate (32) is above the pair of fixed plates (31) and extends towards the front and rear of the pair of fixed plates (31).

2. A scissors jack according to claim 1, wherein: The top head (3) has a pair, the support plate (32) of the pair of top heads (3) is respectively folded and extended from the upper ends of the pair of fixed plates (31) towards the front and rear.

3. A scissors jack according to claim 1, wherein: The top head (3) is connected by a support plate (32) and the top of the pair of fixed plates (31).

4. The scissors jack of claim 1 wherein: It also includes a pair of lower support arm pins (4) and a pair of upper support arm pins (5), the pair of lower support arm pins (4) are respectively arranged at the lower ends of the pair of lower support arms (21), the front and rear ends of the pair of lower support arm pins (4) are connected to the front and rear sides of the base (1) after passing through the pair of lower support arm side edges (211), the pair of upper support arm pins (5) are respectively arranged at the upper ends of the pair of upper support arms (22), the front and rear ends of the pair of upper support arm pins (5) are connected to the pair of fixed plates (31) after passing through the pair of upper support arm folded edges (222).

5. A scissors jack according to claim 4, wherein: The lower support arm left tooth part (2121) is spaced around one of the pair of lower support arm pins (4), and a lower support arm left tooth groove (2123) is formed between two adjacent lower support arm left tooth parts (2121), the lower support arm right tooth part (2122) is spaced around the other lower support arm pin (4) and meshes with the lower support arm left tooth groove (2123), and a lower support arm right tooth groove (2124) which meshes with the lower support arm left tooth part (2121) is formed between two adjacent lower support arm right tooth parts (2122); the upper support arm left tooth part (2221) is spaced around one of the pair of upper support arm pins (5), and an upper support arm left tooth groove (2223) is formed between two adjacent upper support arm left tooth parts (2221), the upper support arm right tooth part (2222) is spaced around the other upper support arm pin (5) and meshes with the upper support arm left tooth groove (2223), and an upper support arm right tooth groove (2224) which meshes with the upper support arm left tooth part (2221) is formed between two adjacent upper support arm right tooth parts (2222).

6. The scissors jack of claim 1 wherein: The front and rear side edges of the pair of lower support arms (21) are folded upward to form the pair of lower support arm side edges (211), and the front and rear side edges of the pair of upper support arms (22) are folded downward to form the pair of upper support arm side edges (221).

7. The scissors jack of claim 1 wherein: The plate thickness of the pair of lower support arms (21) and the pair of upper support arms (22) is 2.8-3.2 mm.

8. The scissors jack of claim 1 wherein: The jack body (2) further comprises a left end hinged shaft (25), a right end hinged shaft (23) and a screw rod (24), the upper end of the pair of lower support arms (21) and the lower end of the pair of upper support arms (22) are respectively hinged through the left end hinged shaft (25) and the right end hinged shaft (23), the screw rod (24) passes through the right end hinged shaft (23) and the left end hinged shaft (25) from right to left and is threadedly connected with the left end hinged shaft (25), the connecting hole (241) of the screw rod (24) is connected with the rocker (6) and rotates with the rotation of the rocker (6), so as to adjust the height position of the top head (3) relative to the base (1).

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