Self-locking hydraulic jack

Abstract

The utility model discloses a self-locking type hydraulic jack which comprises a hydraulic jack body, a base is arranged at the bottom of the hydraulic jack body, a pair of connecting bases is arranged at the movable end of the hydraulic jack body, racks are fixedly connected to the bottoms of the connecting bases, two pairs of limiting plates are arranged at the top of the base, and assembling grooves are formed in the connecting bases. Through the structural design of the fixing block, the supporting block, the rectangular groove, the supporting plate and the threaded rod, when the hydraulic jack works and ascends, the rack can be limited, then self-locking of the hydraulic jack is achieved, meanwhile, during contact limiting, only the threaded rod needs to be screwed, and the hydraulic jack can be automatically locked. Compared with the prior art, the hydraulic jack unlocking device has the advantages that the unlocking mode of the hydraulic jack unlocking device is simpler, meanwhile, the hydraulic jack unlocking device is not affected by the moving and rising distance of the hydraulic jack, and smooth unlocking operation is always guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic jacks, in particular to a self-locking hydraulic jack. Background Art

[0002] A hydraulic jack, also known as an oil jack, is a jack that uses a plunger or a hydraulic cylinder as a rigid jacking piece. It is a kind of simple lifting equipment, generally only equipped with a lifting mechanism for lifting heavy objects. It has a simple structure, light weight, and is easy to carry and move. China's authorized utility model patent (Announcement No.: CN219409076U) discloses a self-locking hydraulic jack. The locking component is set up, and when the hydraulic jack rises, it will not affect its rise. When the hydraulic jack falls, the locking component will lock the rack, thereby preventing the hydraulic jack from falling back, making the use of the hydraulic jack safer. Compared with traditional hydraulic jacks that cannot be self-locking, it is safer.

[0003] However, the above device still has some shortcomings when in use: the above device describes that when the limit needs to be released, the hydraulic jack is raised again, and the limit plate is moved to disengage from the rack. When the hydraulic jack is in use, after the piston rod moves to the maximum stroke, the piston rod can no longer rise, which interferes with the release of the limit. Therefore, a self-locking hydraulic jack is proposed to address the above situation. Utility Model Content

[0004] The purpose of the utility model is to solve the XXX shortcomings existing in the prior art, and to propose a self-locking hydraulic jack.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A self-locking hydraulic jack comprises a hydraulic jack, wherein a base is arranged at the bottom of the hydraulic jack, a pair of connecting seats are arranged at the movable end of the hydraulic jack, a rack is fixedly connected to the bottom of the pair of connecting seats, and two pairs of limit plates are arranged on the top of the base.

[0007] The connecting seat is provided with an assembly groove, in which a support block is slidably matched, and a bolt is threadedly connected to the surface of the connecting seat, and the bolt passes through the support block and extends to the outside of the connecting seat.

[0008] Each pair of limit plates is provided with a self-locking component for locking the rack.

[0009] The self-locking assembly includes a support block rotatably connected to a pair of limit plates, the support block has a rectangular groove, a support plate is slidably fitted in the rectangular groove, one end of the support block is threadedly connected to a threaded rod, the threaded rod penetrates into the rectangular groove, the inserted end of the threaded rod is connected to the support plate, and the end of the support plate away from the threaded rod is inserted into two adjacent teeth of the rack.

[0010] Preferably, the self-locking assembly includes a fixed block fixedly connected to a pair of limit plates, the bottom of the fixed block has a groove, a spring is fixedly connected in the groove, and the bottom end of the spring is connected to the support block.

[0011] Preferably, the support plate is a rectangular plate structure, and the width of the support plate is half of the distance between two adjacent teeth of the rack.

[0012] Preferably, a pair of limiting plates are each provided with a circular hole, and a pair of short shafts are provided on the surface of the supporting block, and the short shafts are rotatably matched with the circular holes.

[0013] Preferably, a pair of slide grooves are provided on the bottom surface and the top surface of the rectangular groove, and a pair of sliders are provided on the top and the bottom of the support plate, and the sliders are slidably matched with the slide grooves.

[0014] Preferably, a pair of threaded holes communicating with the assembly grooves are provided on the connection seat, a pair of through positioning holes are provided on the support block, and the bolts cooperate with the threaded holes and the positioning holes.

[0015] The utility model has the following beneficial effects:

[0016] 1. The utility model uses the structural design of the fixed block, the support block, the rectangular groove, the support plate and the threaded rod, which can limit the rack when the hydraulic jack is working and rising, thereby realizing the self-locking of the hydraulic jack. At the same time, when the limit is contacted, it is only necessary to twist the threaded rod to make the support plate shrink into the rectangular groove to release the limit on the rack, that is, to complete the unlocking of the hydraulic jack. Compared with the prior art, the unlocking method of the device is simpler and will not be affected by the moving and rising distance of the hydraulic jack, so as to always ensure the smooth progress of the unlocking operation.

[0017] 2. The utility model adopts the structural design of the assembly groove, the support block, the positioning hole and the bolt. When using the device, the support block can be slid out of the assembly groove and positioned according to the need of lifting the object, thereby increasing the supporting surface of the hydraulic jack, thereby ensuring the stability during lifting and meeting the lifting use of objects in more situations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a hydraulic jack;

[0019] Figure 2 It is a structural schematic diagram of a self-locking component;

[0020] Figure 3 Schematic diagram of the installation structure of the support plate;

[0021] Figure 4 for Figure 2 Schematic diagram of the local enlarged structure at point A in the middle.

[0022] In the figure: 1. hydraulic jack; 101. base; 2. connecting seat; 201. assembly groove; 202. support block; 2020. positioning hole; 203. bolt; 3. rack; 4. limit plate; 5. self-locking assembly; 6. fixing block; 601. spring; 7. support block; 701. rectangular groove; 702. slide groove; 8. support plate; 801. slider; 9. threaded rod. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] Reference Figure 1-4 A self-locking hydraulic jack includes a hydraulic jack 1. A base 101 is arranged at the bottom of the hydraulic jack 1. A pair of connecting seats 2 are arranged at the moving end of the hydraulic jack 1. The bottoms of the pair of connecting seats 2 are fixedly connected with racks 3. Two pairs of limit plates 4 are arranged on the top of the base 101.

[0025] The connection seat 2 has an assembly groove 201 in which a support block 202 is slidably fitted. A rubber pad is provided on the top of the support block 202 . A bolt 203 is threadedly connected to the surface of the connection seat 2 . The bolt 203 passes through the support block 202 and extends to the outside of the connection seat 2 .

[0026] like Figure 1 and Figure 4 As shown, a pair of threaded holes communicating with the assembly groove 201 are formed on the connection seat 2 , a pair of through positioning holes 2020 are formed on the support block 202 , and the bolts 203 cooperate with the threaded holes and the positioning holes 2020 .

[0027] When using this device, the support block 202 can be slid out of the assembly groove 201 according to the need of lifting the object, and then the bolt 203 can be inserted into the threaded hole, so that the bolt 203 passes through the corresponding positioning hole 2020 to position the support block 202 extending to the outside of the assembly groove 201, thereby increasing the support surface of the hydraulic jack 1, thereby ensuring stability during lifting and meeting the lifting use of objects in more situations.

[0028] Each pair of limiting plates 4 is provided with a self-locking component 5 for locking the rack 3 .

[0029] The self-locking assembly 5 includes a support block 7 rotatably connected to a pair of limit plates 4, such as Figure 2 and Figure 3 As shown, a pair of limiting plates 4 are each provided with a circular hole, and a pair of short shafts are provided on the surface of the supporting block 7, and the short shafts are rotatably matched with the circular holes.

[0030] The support block 7 has a rectangular groove 701, and the support plate 8 is slidably fitted in the rectangular groove 701. Figure 3 As shown, a pair of slide grooves 702 are provided on the bottom and top surfaces of the rectangular groove 701 , and a pair of sliders 801 are provided on the top and bottom of the support plate 8 , and the sliders 801 are slidably matched with the slide grooves 702 .

[0031] Furthermore, there is a distance between the support block 7 and the end surface of the rack 3 .

[0032] One end of the support block 7 is threadedly connected to a threaded rod 9, the threaded rod 9 penetrates into the rectangular groove 701, the penetrated end of the threaded rod 9 is connected to the support plate 8, and the end of the support plate 8 away from the threaded rod 9 is inserted into two adjacent teeth of the rack 3.

[0033] Furthermore, if Figure 1 , Figure 2 and Figure 3 As shown, the support plate 8 is a rectangular plate structure, and the width of the support plate 8 is half of the distance between two adjacent teeth of the rack 3.

[0034] like Figure 2 and Figure 3 As shown, the self-locking assembly 5 also includes a fixing block 6 fixedly connected to a pair of limiting plates 4. The bottom of the fixing block 6 has a groove, and a spring 601 is fixedly connected in the groove. The bottom end of the spring 601 is connected to the supporting block 7.

[0035] When in use, when the hydraulic jack 1 works and rises, the rack 3 will be driven to rise through the connecting seat 2. When the rack 3 rises, the teeth will move the support plate 8, thereby causing the support block 7 to rotate and stretch the spring 601. When the hydraulic jack 1 falls back, the spring 601 will reset, which will pull the support block 7 to reset, causing the support plate 8 to be stuck between the two sets of teeth.

[0036] When the moving end of the hydraulic jack 1 descends, it is only necessary to twist the threaded rod 9, and then the threaded rod 9 drives the support plate 8 to shrink into the rectangular groove 701, so as to release the limit on the rack 3, and thus complete the unlocking of the hydraulic jack 1. Compared with the prior art, the unlocking method of the device is simpler and will not be affected by the moving and rising distance of the hydraulic jack 1, thus ensuring the smooth progress of the unlocking operation.

[0037] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A self-locking hydraulic jack, comprising a hydraulic jack (1), wherein a base (101) is disposed at the bottom of the hydraulic jack (1), a pair of connecting seats (2) are disposed at the movable end of the hydraulic jack (1), a rack (3) is fixedly connected to the bottom of the pair of connecting seats (2), and two pairs of limit plates (4) are disposed at the top of the base (101), characterized in that: The connection seat (2) has an assembly groove (201), a support block (202) is slidably fitted in the assembly groove (201), a bolt (203) is threadedly connected to the surface of the connection seat (2), and the bolt (203) passes through the support block (202) and extends to the outside of the connection seat (2); Each pair of the limiting plates (4) is provided with a self-locking component (5) for locking the rack (3); The self-locking assembly (5) comprises a support block (7) rotatably connected to a pair of limit plates (4), the support block (7) having a rectangular groove (701), a support plate (8) slidably fitted in the rectangular groove (701), and a threaded rod (9) being threadedly connected to one end of the support block (7); The threaded rod (9) is inserted into the rectangular groove (701), the inserted end of the threaded rod (9) is connected to the support plate (8), and the end of the support plate (8) away from the threaded rod (9) is inserted into two adjacent teeth of the rack (3).

2. A self-locking hydraulic jack according to claim 1, characterized in that: The self-locking assembly (5) comprises a fixed block (6) fixedly connected to a pair of limit plates (4), the bottom of the fixed block (6) having a groove, a spring (601) fixedly connected in the groove, and the bottom end of the spring (601) is connected to the support block (7).

3. A self-locking hydraulic jack according to claim 1, characterized in that: The support plate (8) is a rectangular plate structure, and the width of the support plate (8) is half the distance between two adjacent teeth of the rack (3).

4. A self-locking hydraulic jack according to claim 1, characterized in that: A pair of the limiting plates (4) are each provided with a circular hole, and a pair of short shafts are provided on the surface of the supporting block (7), and the short shafts are rotatably matched with the circular holes.

5. A self-locking hydraulic jack according to claim 1, characterized in that: The bottom and top surfaces of the rectangular groove (701) are each provided with a pair of slide grooves (702), and the top and bottom of the support plate (8) are each provided with a pair of sliders (801), and the sliders (801) are slidably matched with the slide grooves (702).

6. A self-locking hydraulic jack according to claim 1, characterized in that: The connection seat (2) is provided with a pair of threaded holes communicating with the assembly groove (201), the support block (202) is provided with a pair of through support blocks (202), and the bolts (203) cooperate with the threaded holes and the support blocks (202).

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