Front damping device of hydraulic oil cylinder

Abstract

The utility model discloses a front-mounted damping device of a hydraulic oil cylinder, which belongs to the technical field of hydraulic oil cylinders, and adopts the technical scheme that the front-mounted damping device comprises a cylinder body, a telescopic rod is arranged in the cylinder body, a mounting block is fixedly sleeved on the surface of the telescopic rod, and two groups of damping components are arranged at the bottom of the mounting block. When the telescopic rods fall back, the telescopic rods can drive mounting blocks and first connecting blocks to move downwards, the first connecting blocks can drive connecting rods to rotate when moving, and the connecting rods can drive corresponding second connecting blocks to move when rotating, so that the two second connecting blocks can move relatively, and the two sides of damping springs can be extruded when the two second connecting blocks move; and the extrusion force generated when the second connecting block moves and the elastic force of the damping spring can be counteracted, so that the impact force generated when the telescopic rod falls back can be buffered, and damage to parts in the cylinder body is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic oil cylinders, in particular to a front-mounted shock absorbing device for a hydraulic oil cylinder. Background Art

[0002] The hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion). It has a simple structure and reliable operation. When it is used to achieve reciprocating motion, the deceleration device can be eliminated, and there is no transmission gap and the motion is smooth. Therefore, it is widely used in the hydraulic systems of various machines. The output force of the hydraulic cylinder is proportional to the effective area of ​​the piston and the pressure difference on both sides.

[0003] After long-term use, dust and dirt are easily accumulated on the surface of the piston rod. If the dust and dirt are not cleaned in time, they will enter the cylinder with the piston rod, causing pollution to the inside of the cylinder. Long-term use will affect the normal use of the hydraulic cylinder and reduce the service life of the hydraulic cylinder.

[0004] The existing patent (publication number: CN218093711U) discloses a hydraulic cylinder assembly, which is provided with a cleaning assembly at one end of the cylinder. The cleaning assembly includes a box body, and screws are respectively inserted into the top and bottom shells of the box body. The screws are locked on the box body by nuts, and an arc-shaped scraper is fixedly connected to the bottom end of the screw. The arc-shaped scraper is sleeved on the surface of the piston rod. When the piston rod moves back and forth, the dirt on the surface of the piston rod can be scraped off by the arc-shaped scraper. At the same time, a liquid inlet and a liquid outlet are provided on the box body, and the dirt can be cleaned by injecting cleaning liquid into the inside of the box body, thereby achieving a self-cleaning effect on the piston rod, improving the surface finish of the piston rod, and preventing dirt from entering the inside of the cylinder to pollute the cylinder and affect the normal use of the hydraulic cylinder.

[0005] In view of the above problems, the existing patent provides a solution. However, when the hydraulic cylinder is in use, due to the lack of a shock absorbing device, the piston will hit the cylinder head when it falls back, which may cause strong impact and vibration, causing deformation or even rupture of the internal parts of the cylinder. At the same time, other components connected to the cylinder, such as pipes, connectors, seals, etc., are also easily damaged, thereby reducing the overall service life of the hydraulic cylinder equipment.

[0006] Therefore, a front-mounted shock absorbing device of a hydraulic cylinder is proposed. Utility Model Content

[0007] The purpose of the utility model is to provide a front-mounted shock-absorbing device for a hydraulic oil cylinder, which can solve the problem that due to the lack of a shock-absorbing device, the piston hits the cylinder cover when falling back, which may produce strong impact and vibration, causing the internal parts of the oil cylinder to deform or even break. At the same time, other components connected to the oil cylinder, such as pipes, connectors, seals, etc. are also easily damaged, thereby reducing the overall service life of the hydraulic oil cylinder equipment.

[0008] To achieve the above object, the utility model provides the following technical solution: a front-mounted shock absorbing device of a hydraulic oil cylinder, comprising a cylinder body, a telescopic rod is arranged inside the cylinder body, a mounting block is fixedly sleeved on the surface of the telescopic rod, two groups of shock absorbing components are arranged at the bottom of the mounting block, a supporting component is arranged at the bottom of the shock absorbing component, and the supporting component includes a supporting plate;

[0009] The shock absorbing assembly includes a first connecting block, a second connecting block, a connecting hole, a connecting rod and a shock absorbing spring. The number of the first connecting block and the second connecting block is set to two. The connecting holes are opened inside the first connecting block and the second connecting block. The first connecting block is fixedly connected to the bottom of the mounting block, and the second connecting block is fixedly connected to the top of the support plate. The connecting rod is rotatably connected to the first connecting block and the second connecting block on one side respectively, and the shock absorbing spring is fixedly connected between the opposite sides of the two second connecting blocks.

[0010] Preferably, the support plate is fixedly connected to the top of the cylinder body and the telescopic rod passes through the support plate, the left side of the top of the support plate is fixedly connected to a fixed plate, the right side of the top of the support plate is movably connected to a movable plate and a placement groove is provided on one side of the movable plate close to the fixed plate.

[0011] Preferably, a limiting rod is fixedly connected to the right side of the fixing plate and the limiting rod passes through the connecting hole and is slidably connected to the connecting hole, the right end of the limiting rod is movably connected to the inside of the placement slot, and the shock-absorbing spring is movably sleeved on the surface of the limiting rod.

[0012] Preferably, a slide groove is provided on the right side of the top of the support plate, and the movable plate is slidably connected inside the slide groove.

[0013] Preferably, the first connecting block and the second connecting block are both penetrated by connecting pieces, and the front and rear sides of the surfaces of the connecting pieces are provided with external threads, and the surfaces of the external threads are threadedly connected with nuts.

[0014] Preferably, the connecting rod is fixedly connected with a collar on one side close to the first connecting block and the second connecting block. The collar is sleeved on the surface of the connecting piece and the collar is movably connected with the thread on one side close to the nut.

[0015] Preferably, the right side of the support plate is threadedly connected to a limit screw, and the end of the limit screw extends to the inside of the slide groove, and the side of the limit screw close to the movable plate is tightly fitted with the movable plate.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The present application sets a shock-absorbing assembly. When the telescopic rod falls back, the telescopic rod drives the mounting block and the first connecting block to move downward. When the first connecting block moves, it drives the connecting rod to rotate. When the connecting rod rotates, it drives the corresponding second connecting block to move, so that the two second connecting blocks can move relative to each other. When the two second connecting blocks move, they squeeze the two sides of the shock-absorbing spring, so that the squeezing force of the second connecting block when it moves and the elastic force of the shock-absorbing spring itself offset each other, thereby buffering the impact force when the telescopic rod falls back and avoiding damage to the internal parts of the cylinder body;

[0018] 2. The present application sets up a support assembly, and the support plate can support the fixed plate, the movable plate and the limit rod. The limit rod can limit the moving route of the second connecting block and the telescopic route of the shock-absorbing spring, so that the shock-absorbing assembly can be used stably, and the movable plate can be moved flexibly, so that the second connecting block and the shock-absorbing spring can be flexibly replaced, thereby improving flexibility during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is the overall structural diagram of the front-mounted shock absorbing device of the hydraulic cylinder of the utility model;

[0020] Figure 2 It is a structural schematic diagram of the shock absorbing assembly of the utility model;

[0021] Figure 3 This is a schematic diagram of the connection of the connector, external thread and nut of the utility model;

[0022] Figure 4 This is a schematic diagram of the connection between the first connecting block and the sleeve ring of the utility model;

[0023] Figure 5 It is a structural schematic diagram of the support assembly of the utility model.

[0024] In the figure, 1, cylinder body; 2, telescopic rod; 3, mounting block; 4, shock absorbing assembly; 401, first connecting block; 402, second connecting block; 403, connecting hole; 404, connecting rod; 405, shock absorbing spring; 5, supporting assembly; 501, supporting plate; 502, fixing plate; 503, moving plate; 504, placement groove; 505, limiting rod; 6, sliding groove; 7, connecting piece; 8, external thread; 9, nut; 10, collar; 11, limiting screw. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-5 , the utility model provides a technical solution:

[0027] A front-mounted shock absorbing device of a hydraulic oil cylinder comprises a cylinder body 1, a telescopic rod 2 is arranged inside the cylinder body 1, a mounting block 3 is fixedly sleeved on the surface of the telescopic rod 2, two groups of shock absorbing components 4 are arranged at the bottom of the mounting block 3, a supporting component 5 is arranged at the bottom of the shock absorbing component 4, and the supporting component 5 comprises a supporting plate 501;

[0028] The shock absorbing assembly 4 includes a first connecting block 401, a second connecting block 402, a connecting hole 403, a connecting rod 404 and a shock absorbing spring 405. The number of the first connecting block 401 and the second connecting block 402 is set to two. The connecting hole 403 is opened inside the first connecting block 401 and the second connecting block 402. The first connecting block 401 is fixedly connected to the bottom of the mounting block 3, the second connecting block 402 is fixedly connected to the top of the support plate 501, and the connecting rod 404 is rotatably connected to the first connecting block 401 and the second connecting block 402 on one side respectively, and the shock absorbing spring 405 is fixedly connected between the opposite sides of the two second connecting blocks 402.

[0029] In this embodiment: by setting the shock absorbing assembly 4, when the telescopic rod 2 falls back, the telescopic rod 2 will drive the mounting block 3 and the first connecting block 401 to move downward, and the first connecting block 401 will drive the connecting rod 404 to rotate when moving, and the connecting rod 404 will drive the corresponding second connecting block 402 to move when rotating, so that the two second connecting blocks 402 can move relative to each other, and the two second connecting blocks 402 will squeeze the two sides of the shock absorbing spring 405 when moving, so that the squeezing force of the second connecting block 402 when moving will offset the elastic force of the shock absorbing spring 405 itself, thereby buffering the impact force when the telescopic rod 2 falls back, avoiding damage to the internal parts of the cylinder body 1.

[0030] Specifically, Figure 1 , Figure 5 As shown, the support plate 501 is fixedly connected to the top of the cylinder body 1 and the telescopic rod 2 passes through the support plate 501, the left side of the top of the support plate 501 is fixedly connected to the fixed plate 502, the right side of the top of the support plate 501 is movably connected to the movable plate 503 and a placement groove 504 is provided on the side of the movable plate 503 close to the fixed plate 502.

[0031] Specifically, Figure 1 , Figure 5 As shown, the right side of the fixed plate 502 is fixedly connected to a limiting rod 505, and the limiting rod 505 passes through the connecting hole 403 and is slidably connected to the connecting hole 403; the right end of the limiting rod 505 is movably connected to the inside of the placement groove 504, and the shock-absorbing spring 405 is movably sleeved on the surface of the limiting rod 505.

[0032] Specifically, Figure 5 As shown, a slide groove 6 is provided on the right side of the top of the support plate 501 , and the movable plate 503 is slidably connected inside the slide groove 6 .

[0033] In this embodiment: by setting up the support assembly 5, the support plate 501 can support the fixed plate 502, the movable plate 503 and the limiting rod 505, and the limiting rod 505 can limit the moving route of the second connecting block 402 and the telescopic route of the shock-absorbing spring 405, so that the shock-absorbing assembly 4 can be used stably, and the movable plate 503 can be moved flexibly, so that the second connecting block 402 and the shock-absorbing spring 405 can be easily and flexibly replaced, thereby improving the flexibility during use.

[0034] Specifically, Figure 2 , Figure 3 As shown, the first connection block 401 and the second connection block 402 are both penetrated by a connection piece 7 , and the front and rear sides of the surface of the connection piece 7 are provided with external threads 8 , and the surface of the external threads 8 is threadedly connected with a nut 9 .

[0035] Specifically, Figure 2 , Figure 4 As shown, the connecting rod 404 is fixedly connected to one side close to the first connecting block 401 and the second connecting block 402 with a collar 10, the collar 10 is sleeved on the surface of the connecting member 7 and the side close to the nut 9 is movably connected to the thread.

[0036] In this embodiment: through the above settings, the connecting rod 404 is rotatably connected to the first connecting block 401 and the second connecting block 402, and by setting the connecting piece 7, the collar 10 and the connecting rod 404 are easy to disassemble and assemble, and the nut 9 can limit the position of the collar 10 and the connecting rod 404 to prevent the connecting rod 404 from being offset or falling when in use.

[0037] Specifically, Figure 1 As shown, the right side of the support plate 501 is threadedly connected with a limit screw 11, and the end of the limit screw 11 extends to the inside of the slide groove 6, and the side of the limit screw 11 close to the movable plate 503 is tightly fitted with the movable plate 503.

[0038] In this embodiment: through the above arrangement, the limit screw 11 can limit and fix the position of the movable plate 503, thereby improving the stability of the movable plate 503 when in use.

[0039] Working principle: when the telescopic rod 2 falls back, the telescopic rod 2 will drive the mounting block 3 and the first connecting block 401 to move downward, and the first connecting block 401 will drive the connecting rod 404 to rotate when it moves, and the connecting rod 404 will drive the corresponding second connecting block 402 to move when it rotates, so that the two second connecting blocks 402 will move relative to each other, and the two second connecting blocks 402 will squeeze the two sides of the shock absorbing spring 405 when they move, so that the squeezing force of the second connecting block 402 when it moves will offset the elastic force of the shock absorbing spring 405 itself, thereby preventing the telescopic rod 2 from falling back. The impact force has the effect of buffering and shock absorbing. When the shock absorbing spring 405 needs to be replaced after long-term use, loosen each nut 9, remove the nut 9, and then take out the connecting piece 7 from the inside of the second connecting block 402. Then the connecting rod 404 will be separated from the second connecting block 402, and then loosen the limiting screw 11, so that the movable plate 503 can be moved out from the inside of the slide groove 6. After that, the second connecting block 402 and the shock absorbing spring 405 can be moved out of the surface of the limiting rod 505, and finally replace the new second connecting block 402 and the shock absorbing spring 405.

[0040] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A front-mounted shock absorbing device for a hydraulic cylinder, comprising a cylinder body (1), characterized in that: A telescopic rod (2) is arranged inside the cylinder body (1); a mounting block (3) is fixedly sleeved on the surface of the telescopic rod (2); two groups of shock absorbing components (4) are arranged at the bottom of the mounting block (3); a supporting component (5) is arranged at the bottom of the shock absorbing component (4); and the supporting component (5) comprises a supporting plate (501); The shock absorbing assembly (4) comprises a first connecting block (401), a second connecting block (402), a connecting hole (403), a connecting rod (404) and a shock absorbing spring (405); the number of the first connecting block (401) and the number of the second connecting block (402) are both set to two; the connecting hole (403) is opened inside the first connecting block (401) and the second connecting block (402); the first connecting block (401) is fixedly connected to the bottom of the mounting block (3); the second connecting block (402) is fixedly connected to the top of the supporting plate (501); the connecting rod (404) is rotatably connected to the first connecting block (401) and the second connecting block (402) at one side thereof; and the shock absorbing spring (405) is fixedly connected between opposite sides of the two second connecting blocks (402).

2. A front-mounted shock absorbing device for a hydraulic cylinder according to claim 1, characterized in that: The support plate (501) is fixedly connected to the top of the cylinder body (1) and the telescopic rod (2) passes through the support plate (501); the left side of the top of the support plate (501) is fixedly connected to a fixed plate (502); the right side of the top of the support plate (501) is movably connected to a movable plate (503); and a placement groove (504) is provided on one side of the movable plate (503) close to the fixed plate (502).

3. A front-mounted shock absorbing device for a hydraulic cylinder according to claim 2, characterized in that: The right side of the fixed plate (502) is fixedly connected to a limiting rod (505), and the limiting rod (505) passes through the connecting hole (403) and is slidably connected to the connecting hole (403). The right end of the limiting rod (505) is movably connected to the inside of the placement groove (504), and the shock absorbing spring (405) is movably sleeved on the surface of the limiting rod (505).

4. A front-mounted shock absorbing device for a hydraulic cylinder according to claim 2, characterized in that: A slide groove (6) is provided on the right side of the top of the support plate (501), and the movable plate (503) is slidably connected inside the slide groove (6).

5. The front-mounted shock absorbing device of a hydraulic cylinder according to claim 1, characterized in that: The first connecting block (401) and the second connecting block (402) are both penetrated by connecting pieces (7), and the front and rear sides of the surfaces of the connecting pieces (7) are provided with external threads (8), and the surfaces of the external threads (8) are threadedly connected with nuts (9).

6. The front-mounted shock absorbing device of a hydraulic cylinder according to claim 1, characterized in that: The connecting rod (404) is fixedly connected to a collar (10) on one side close to the first connecting block (401) and the second connecting block (402); the collar (10) is sleeved on the surface of the connecting member (7) and the collar (10) is movably connected to the thread on one side close to the nut (9).

7. The front-mounted shock absorbing device of a hydraulic cylinder according to claim 2, characterized in that: The right side of the support plate (501) is threadedly connected to a limit screw (11), and the end of the limit screw (11) extends to the inside of the slide groove (6), and the side of the limit screw (11) close to the movable plate (503) is tightly fitted with the movable plate (503).

Images