Hydraulic oil cylinder with double buffering

Abstract

The utility model relates to the technical field of hydraulic oil cylinders, in particular to a hydraulic oil cylinder with double buffering, which is provided with an oil cylinder body and a piston rod. A first buffering assembly and a second buffering assembly are arranged on the outer wall of the oil cylinder body, the first buffering assembly comprises a first fixing sleeve, a first sliding rod and a first buffering part, and the second buffering assembly comprises a second fixing sleeve, a second sliding rod and a second buffering part; a first pressed plate and a second pressed plate are further arranged, the first pressed plate and the second pressed plate are arranged on the piston rod in a sliding mode, the first sliding rod and the second sliding rod are fixedly connected with the first pressed plate and the second pressed plate respectively, and a first pressing block and a second pressing block are fixedly arranged on the piston rod; the first pressed plate is far away from the oil cylinder body, and the second pressed plate is close to the oil cylinder body; according to the utility model, double buffering can be carried out, and strong impact and vibration can be reduced to a greater extent.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic cylinders, and particularly relates to a hydraulic cylinder with double buffering. Background Art

[0002] A hydraulic cylinder is a device that converts hydraulic energy into mechanical energy and is mainly used to drive linear motion. It has a wide range of applications in the fields of industry, construction, agricultural machinery, etc. The basic working principle of a hydraulic cylinder is to utilize the incompressible property of the liquid. Through the reciprocating motion of the piston in the sealed cylinder body, the function of pushing and pulling heavy objects is realized; the cylinder drives the piston to reciprocate through the pressure of the internal liquid (usually hydraulic oil), thereby realizing the actions of various mechanical equipment.

[0003] At present, in the actual application process of most hydraulic cylinders, they can convert hydraulic energy into mechanical energy well, which is convenient for workers to use them well. However, during the use process, since the hydraulic cylinder bears a large pressure during operation, strong impacts and vibrations may damage the internal components of the hydraulic cylinder, such as pistons, piston rods, seals, etc., and may also damage the mechanical equipment connected to it; at the same time, strong impacts and vibrations may also cause the hydraulic oil to splash out from places with poor sealing. Summary of the Invention

[0004] The purpose of the utility model is to provide a hydraulic cylinder with double buffering, which can perform double buffering and reduce strong impacts and vibrations to a greater extent.

[0005] The technical solution for achieving the object of the present utility model is as follows: The present utility model has an oil cylinder body and a piston rod. The piston rod has a sliding end slidably disposed inside the oil cylinder body at one end and an extending end located outside the oil cylinder body. It is characterized in that: A first buffer assembly and a second buffer assembly are provided on the outer wall of the oil cylinder body. The first buffer assembly includes a first fixed sleeve fixedly provided on the outer wall of the oil cylinder body, a first sliding rod with its bottom end slidably disposed inside the first fixed sleeve, and a first buffer portion provided inside the first fixed sleeve and used for sliding buffering of the first sliding rod. The second buffer assembly includes a second fixed sleeve fixedly provided on the outer wall of the oil cylinder body, a second sliding rod with its bottom end slidably disposed inside the second fixed sleeve, and a second buffer portion provided inside the second fixed sleeve and used for sliding buffering of the first sliding rod. A first pressure-receiving plate and a second pressure-receiving plate are also provided. Both the first pressure-receiving plate and the second pressure-receiving plate are slidably disposed on the extending end of the piston rod. The top ends of the first sliding rod and the second sliding rod are respectively fixedly connected to the first pressure-receiving plate and the second pressure-receiving plate. A first pressing block that can cooperate with the first pressure-receiving plate and a second pressing block that can cooperate with the second pressure-receiving plate are fixedly provided on the extending end of the piston rod. The first pressure-receiving plate is disposed away from the oil cylinder body, and the second pressure-receiving plate is disposed close to the oil cylinder body. The first pressure-receiving plate and the second pressure-receiving plate can respectively move towards the oil cylinder body in sequence through the cooperation with the first pressing block and the second pressing block.

[0006] Further, sliding grooves with their tops communicating with the outside are provided inside both the first fixed sleeve and the second fixed sleeve. A sliding groove with both ends not communicating with the outside is provided on the side wall of the sliding groove. The bottom ends of the first sliding rod and the second sliding rod are respectively slidably disposed inside the sliding grooves of the first fixed sleeve and the second fixed sleeve. Sliding blocks that can form a sliding fit with the sliding groove are fixedly provided on both the first sliding rod and the second sliding rod. Both the first buffer portion and the second buffer portion include buffer springs, a first magnetic block, and a second magnetic block. Two sets of buffer springs are provided and are respectively fixedly provided at both ends of the sliding groove. The first magnetic block is fixedly provided at the bottom of the sliding groove. The second magnetic block is fixedly provided at the bottom ends of both the first sliding rod and the second sliding rod. The magnetic properties of the opposite sides of the first magnetic block and the second magnetic block are opposite. The first sliding rod and the second sliding rod are respectively buffered inside the first fixed sleeve and the second fixed sleeve by the elastic force of the buffer spring and the opposite magnetic properties of the first magnetic block and the second magnetic block.

[0007] Further, two sets of both the first buffer assembly and the second buffer assembly are provided. The two sets of first buffer assemblies are symmetrically and fixedly provided on the outer wall of the hydraulic oil cylinder, and the two sets of second buffer assemblies are symmetrically and fixedly provided on the outer wall of the hydraulic oil cylinder. The first pressure-receiving plate and the second pressure-receiving plate are slidably sleeved on the piston rod. The two sides of the first pressure-receiving plate are respectively fixedly connected to the first sliding rods in the two sets of first buffer assemblies, and the two sides of the second pressure-receiving plate are respectively fixedly connected to the second sliding rods in the two sets of second buffer assemblies.

[0008] Further, holes through which the piston rod can pass are provided on both the first pressure receiving plate and the second pressure receiving plate, and the first pressure receiving plate and the second pressure receiving plate are slidably sleeved on the telescopic end of the piston rod through the holes.

[0009] Further, through grooves corresponding to the second pressing blocks one by one and through which the second pressing blocks can pass are provided on the first pressure receiving plate.

[0010] Further, first sliding support seats corresponding to the first sliding rods one by one and second sliding support seats corresponding to the second sliding rods one by one are fixedly provided on the outer wall of the oil cylinder body. A first sliding hole through which the first sliding rod can pass and which forms a sliding fit is provided on the first support seat, and a second sliding hole through which the second sliding rod can pass and which forms a sliding fit is provided on the second support seat; the first sliding support seat forms a sliding fit with the first sliding rod through the first sliding hole, and the second sliding support seat forms a sliding fit with the second sliding rod through the second sliding hole.

[0011] The utility model has positive effects: (1) A first buffer assembly and a second buffer assembly are provided on the outer wall of the oil cylinder body of the utility model; through the cooperation formed by the first pressing block and the second pressing block with the first pressure receiving plate and the second pressure receiving plate in sequence, and the sequential buffering of the first sliding rod and the second sliding rod by the first buffer portion and the second buffer portion respectively, two - stage buffering is formed, which can buffer the retraction of the piston rod to a greater extent after being strongly impacted and vibrated, and avoid damage to the internal components of the hydraulic cylinder and leakage of hydraulic oil.

[0012] (2) Both the first buffer portion and the second buffer portion of the utility model include buffer springs, first magnetic blocks and second magnetic blocks. There are two groups of buffer springs which are respectively fixedly arranged at both ends of the sliding groove. The first magnetic block is fixedly arranged at the bottom of the sliding groove. The second magnetic blocks are fixedly arranged at the bottom ends of the first sliding rod and the second sliding rod. The magnetic properties of the opposite surfaces of the first magnetic block and the second magnetic block are opposite; buffering is carried out through the elastic force of the buffer spring to weaken strong impacts and vibrations, and the buffer effect is strengthened by the opposite magnetic properties between the first magnetic block and the second magnetic block, further ensuring the buffer effect.

[0013] (3) There are two groups of both the first buffer assembly and the second buffer assembly of the utility model. The two groups of first buffer assemblies are symmetrically and fixedly arranged on the outer wall of the hydraulic cylinder, and the two groups of second buffer assemblies are symmetrically and fixedly arranged on the outer wall of the hydraulic cylinder; it can strengthen the stability of the first buffer assembly and the second buffer assembly during the buffering process, and avoid the situation of disengagement of the cooperation formed by the first pressing block and the second pressing block with the first pressure receiving plate and the second pressure receiving plate respectively.

[0014] (4) The first pressure-receiving plate of the present utility model is provided with through grooves corresponding to the second pressing blocks one by one and allowing the second pressing blocks to pass through. When the piston rod is not subjected to strong impacts and vibrations, the second pressing blocks can be as far away from the second pressure-receiving plate as possible, ensuring the telescopic length of the piston rod and avoiding the limitation of the telescopic length of the piston rod due to the presence of the second pressing blocks.

[0015] (5) On the outer wall of the oil cylinder body of the present utility model, first sliding support seats corresponding to the first sliding rods one by one and second sliding support seats corresponding to the second sliding rods one by one are fixedly provided; the first sliding support seats and the second sliding support seats can respectively perform sliding guidance on the first sliding rods and the second sliding rods, and at the same time support the first sliding rods and the second sliding rods, avoiding the middle bending of the first sliding rods and the second sliding rods due to excessive impacts and vibrations. Description of the Drawings

[0016] In order to make the content of the present utility model easier to be clearly understood, the following further details the present utility model according to specific embodiments in combination with the drawings, where

[0017] Figure 1 is the overall structural schematic diagram of the present utility model;

[0018] Figure 2 is the top view of the present utility model;

[0019] Figure 3 is the cross-sectional view of the first buffer assembly of the present utility model;

[0020] Figure 4 is the cross-sectional view of the second buffer assembly of the present utility model. Detailed Embodiments

[0021] See Figures 1 to 4, the utility model has an oil cylinder body 1 and a piston rod 2. The piston rod 2 has a sliding end with one end slidably disposed inside the oil cylinder body 1 and an extending end 21 located outside the oil cylinder body 1. It is characterized in that: a first buffer assembly and a second buffer assembly are provided on the outer wall of the oil cylinder body 1. The first buffer assembly includes a first fixed sleeve 31 fixedly provided on the outer wall of the oil cylinder body 1, a first sliding rod 32 with its bottom end slidably disposed inside the first fixed sleeve 31, and a first buffer portion 33 provided inside the first fixed sleeve 31 and used for sliding buffering of the first sliding rod 32. The second buffer assembly includes a second fixed sleeve 41 fixedly provided on the outer wall of the oil cylinder body 1, a second sliding rod 42 with its bottom end slidably disposed inside the second fixed sleeve 41, and a second buffer portion 43 provided inside the second fixed sleeve 41 and used for sliding buffering of the first sliding rod 32. A first pressure-receiving plate 5 and a second pressure-receiving plate 6 are also provided. Both the first pressure-receiving plate 5 and the second pressure-receiving plate 6 are slidably disposed on the extending end 21 of the piston rod 2. The top portions of the first sliding rod 32 and the second sliding rod 42 are respectively fixedly connected to the first pressure-receiving plate 5 and the second pressure-receiving plate 6. A first pressing block 22 that can cooperate with the first pressure-receiving plate 5 and a second pressing block 23 that can cooperate with the second pressure-receiving plate 6 are fixedly provided on the extending end 21 of the piston rod 2. The first pressure-receiving plate 5 is disposed away from the oil cylinder body 1, and the second pressure-receiving plate 6 is disposed close to the oil cylinder body 1. The first pressure-receiving plate 5 and the second pressure-receiving plate 6 can respectively move towards the oil cylinder body 1 in sequence through their cooperation with the first pressing block 22 and the second pressing block 23.

[0022] Through the cooperation formed by the first pressing block 22 and the second pressing block 23 with the first pressure-receiving plate 5 and the second pressure-receiving plate 6 in sequence, and the sequential buffering of the first sliding rod 32 and the second sliding rod 42 by the first buffer portion 33 and the second buffer portion 43 respectively, thus forming two-stage buffering, it can buffer the retraction of the piston rod 2 to a greater extent after being strongly impacted and vibrated, and avoid damage to the internal components of the hydraulic cylinder and leakage of hydraulic oil.

[0023] The interiors of the first fixed sleeve 31 and the second fixed sleeve 41 are both provided with sliding grooves 7 with the tops communicating with the outside. On the side walls of the sliding grooves 7, there are sliding grooves 71 that are not connected to the outside at both ends. The bottoms of the first sliding rod 32 and the second sliding rod 42 are respectively slidably arranged inside the sliding grooves 7 of the first fixed sleeve 31 and the second fixed sleeve 41. On the first sliding rod 32 and the second sliding rod 42, there are both fixedly provided sliders 72 that can form a sliding fit with the sliding grooves 71; both the first buffer portion 33 and the second buffer portion 43 include a buffer spring a, a first magnet b, and a second magnet c. There are two groups of buffer springs a, which are respectively fixedly arranged at both ends of the sliding groove 71. The first magnet b is fixedly arranged on the bottom of the sliding groove 7. On the bottom ends of the first sliding rod 32 and the second sliding rod 42, there are both fixedly provided the second magnets c mentioned above. The magnetic properties of the opposite sides of the first magnet b and the second magnet c are opposite. The first sliding rod 32 and the second sliding rod 42 are buffered inside the first fixed sleeve 31 and the second fixed sleeve 41 respectively by the elastic force of the buffer spring a and the opposite magnetic properties of the first magnet b and the second magnet c.

[0024] Buffer through the elastic force of the buffer spring a to weaken strong impacts and vibrations, and strengthen the buffer effect through the opposite magnetic properties between the first magnet b and the second magnet c, further ensuring the buffer effect.

[0025] There are two groups of the first buffer assemblies and the second buffer assemblies. The two groups of first buffer assemblies are symmetrically and fixedly arranged on the outer wall of the hydraulic cylinder. The two groups of second buffer assemblies are symmetrically and fixedly arranged on the outer wall of the hydraulic cylinder; the first pressure receiving plate 5 and the second pressure receiving plate 6 are slidably sleeved on the piston rod 2. The two sides of the first pressure receiving plate 5 are respectively fixedly connected to the first sliding rods 32 in the two groups of first buffer assemblies. The two sides of the second pressure receiving plate 6 are respectively fixedly connected to the second sliding rods 42 in the two groups of second buffer assemblies.

[0026] It can strengthen the stability of the first buffer assembly and the second buffer assembly during the buffering process, and avoid the situation of disengagement when the first pressing block 22 and the second pressing block 23 respectively form a fit with the first pressure receiving plate 5 and the second pressure receiving plate 6.

[0027] Both the first pressure receiving plate 5 and the second pressure receiving plate 6 are provided with holes through which the piston rod 2 can pass. The first pressure receiving plate 5 and the second pressure receiving plate 6 are slidably sleeved on the telescopic end of the piston rod 2 through the holes.

[0028] The first pressure receiving plate 5 is provided with through grooves 51 that correspond one-to-one with the second pressing block 23 and through which the second pressing block 23 can pass. The second pressing block 23 can be as far away from the second pressure receiving plate 6 as possible when the piston rod 2 is not subjected to strong impacts and vibrations, ensuring the telescopic length of the piston rod 2 and avoiding restricting the telescopic length of the piston rod 2 due to the presence of the second pressing block 23.

[0029] The above-mentioned first pressing block 22 is arranged on the top side of the second pressure receiving plate 6 facing the telescopic end of the piston rod 2, and the second pressing block 23 can be arranged between the first pressure receiving plate 5 and the second pressure receiving plate 6; the first pressing block 22 and the second pressing block 23 can also be arranged on the top side of the first pressure receiving plate 5 facing the telescopic end of the piston rod 2 at the same time.

[0030] The distance between the first pressing block 22 and the second pressing block 23 and the distance between the first pressure receiving plate 5 and the second pressure receiving plate 6 both satisfy that after the first pressing block 22 and the first pressure receiving plate 5 are matched, within the sliding range of the first pressure receiving plate 5, the second pressing block 23 can be matched with the second pressure receiving plate 6.

[0031] At the same time, in order to ensure that after the first pressure receiving plate 5 slides, the first sliding rod 32 has enough sliding space to ensure that the first pressure receiving plate 5 and the second pressure receiving plate 6 can slide simultaneously, the length of the sliding groove 7 in the first fixed sleeve 31 is greater than the length of the sliding groove 7 in the second fixed sleeve 41.

[0032] A plurality of the first pressing blocks 22 and the second pressing blocks 23 are provided, and they are all circumferentially distributed on the piston rod 2 with the axis of the piston rod 2 as the center.

[0033] On the outer wall of the oil cylinder body 1, a first sliding support seat 8 corresponding to the first sliding rod 32 one by one and a second sliding support seat 9 corresponding to the second sliding rod 42 one by one are fixedly provided. The first support seat is provided with a first sliding hole through which the first sliding rod 32 can pass and form a sliding fit, and the second support seat is provided with a second sliding hole through which the second sliding rod 42 can pass and form a sliding fit; the first sliding support seat 8 forms a sliding fit with the first sliding rod 32 through the first sliding hole, and the second sliding support seat 9 forms a sliding fit with the second sliding rod 42 through the second sliding hole; the first sliding support seat 8 and the second sliding support seat 9 can respectively guide the sliding of the first sliding rod 32 and the second sliding rod 42, and at the same time support the first sliding rod 32 and the second sliding rod 42 to prevent the middle parts of the first sliding rod 32 and the second sliding rod 42 from bending due to excessive impact and vibration.

[0034] Working principle of the utility model: The piston rod 2 retracts, and the second pressing block 23 on the piston rod 2 enters the space between the first pressure receiving plate 5 and the second pressure receiving plate 6 through the through groove 51 on the first pressure receiving plate 5; The first pressing block 22 forms a fit with the first pressure receiving plate 5, driving the first pressure receiving plate 5 to slide towards the cylinder body 1. During the sliding process of the first pressure receiving plate 5, the first sliding rod 32 forms a fit with the buffer spring a in the sliding groove 71 of the first fixed sleeve 31, and the first buffer part 33 forms the first buffer; During the first buffering process, the second pressing block 23 forms a fit with the second pressure receiving plate 6, driving the second pressure receiving plate 6 to slide towards the cylinder body 1. During the sliding process of the second pressure receiving plate 6, the second sliding rod 42 forms a fit with the buffer spring a in the sliding groove 71 of the second fixed sleeve 41, and the second buffer part 43 forms the second buffer;

[0035] After the first pressing block 22 and the second pressing block 23 are respectively in cooperation with the first pressure receiving plate 5 and the second pressure receiving plate 6, the first sliding rod 32 and the second sliding rod 42 can continue to slide. At this time, the first magnetic block b and the second magnetic block c in the first buffer part 33 and the second buffer part 43 approach each other simultaneously, and the buffer effect is enhanced by the opposite magnetism between the first magnetic block b and the second magnetic block c.

[0036] In the above specific embodiments, the purpose, technical solution and beneficial effects of the utility model are further described in detail. It should be understood that the above are only specific embodiments of the utility model and are not used to limit the utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A hydraulic cylinder with double buffering, comprising a cylinder body (1) and a piston rod (2). The piston rod (2) has a sliding end with one end slidably disposed inside the cylinder body (1) and an extending end (21) located outside the cylinder body (1); characterized in that: A first buffer assembly and a second buffer assembly are provided on the outer wall of the cylinder body (1). The first buffer assembly includes a first fixing sleeve (31) fixedly provided on the outer wall of the cylinder body (1), a first sliding rod (32) with its bottom end slidably arranged inside the first fixing sleeve (31), and a first buffer portion (33) arranged inside the first fixing sleeve (31) and used for sliding buffering of the first sliding rod (32). The second buffer assembly includes a second fixing sleeve (41) fixedly provided on the outer wall of the cylinder body (1), a second sliding rod (42) with its bottom end slidably arranged inside the second fixing sleeve (41), and a second buffer portion (43) arranged inside the second fixing sleeve (41) and used for sliding buffering of the first sliding rod (32). A first pressure receiving plate (5) and a second pressure receiving plate (6) are also provided. Both the first pressure receiving plate (5) and the second pressure receiving plate (6) are slidably arranged on the extended end (21) of the piston rod (2). The top parts of the first sliding rod (32) and the second sliding rod (42) are respectively fixedly connected to the first pressure receiving plate (5) and the second pressure receiving plate (6). A first pressing block (22) capable of cooperating with the first pressure receiving plate (5) and a second pressing block (23) capable of cooperating with the second pressure receiving plate (6) are fixedly provided on the extended end (21) of the piston rod (2). The first pressure receiving plate (5) is arranged away from the cylinder body (1), and the second pressure receiving plate (6) is arranged close to the cylinder body (1). The first pressure receiving plate (5) and the second pressure receiving plate (6) can respectively move towards the cylinder body (1) in sequence through cooperation with the first pressing block (22) and the second pressing block (23).

2. A hydraulic cylinder with double buffering according to claim 1, characterized in that: Sliding grooves (7) with their tops communicating with the outside are provided inside both the first fixing sleeve (31) and the second fixing sleeve (41). A sliding groove (71) whose both ends do not communicate with the outside is provided on the side wall of the sliding groove (7). The bottom parts of the first sliding rod (32) and the second sliding rod (42) are respectively slidably arranged inside the sliding grooves (7) of the first fixing sleeve (31) and the second fixing sleeve (41). Sliding blocks (72) capable of forming a sliding fit with the sliding groove (71) are fixedly provided on both the first sliding rod (32) and the second sliding rod (42). Both the first buffer portion (33) and the second buffer portion (43) include a buffer spring (a), a first magnet (b), and a second magnet (c). Two groups of buffer springs (a) are provided and are respectively fixedly arranged at both ends of the sliding groove (71). The first magnet (b) is fixedly provided on the bottom of the sliding groove (7). The second magnet (c) is fixedly provided on the bottom ends of both the first sliding rod (32) and the second sliding rod (42). The opposite sides of the first magnet (b) and the second magnet (c) have opposite magnetic polarities. The first sliding rod (32) and the second sliding rod (42) are buffered inside the first fixing sleeve (31) and the second fixing sleeve (41) respectively by the elastic force of the buffer spring (a) and the opposite magnetic polarities of the first magnet (b) and the second magnet (c).

3. A hydraulic cylinder with double buffering according to claim 1, characterized in that: Both the first buffer assembly and the second buffer assembly are provided with two groups. The two groups of first buffer assemblies are symmetrically and fixedly arranged on the outer wall of the hydraulic cylinder, and the two groups of second buffer assemblies are symmetrically and fixedly arranged on the outer wall of the hydraulic cylinder. The first pressure receiving plate (5) and the second pressure receiving plate (6) are slidably sleeved on the piston rod (2). The two sides of the first pressure receiving plate (5) are respectively fixedly connected to the first sliding rods (32) in the two groups of first buffer assemblies, and the two sides of the second pressure receiving plate (6) are respectively fixedly connected to the second sliding rods (42) in the two groups of second buffer assemblies.

4. A hydraulic cylinder with double buffering according to claim 3, characterized in that: Both the first pressure receiving plate (5) and the second pressure receiving plate (6) are provided with holes through which the piston rod (2) can pass. The first pressure receiving plate (5) and the second pressure receiving plate (6) are slidably sleeved on the telescopic end of the piston rod (2) through the holes.

5. A hydraulic cylinder with double buffering according to claim 1, characterized in that: The first pressure receiving plate (5) is provided with through grooves (51) corresponding one-to-one to the second pressure blocks (23) and through which the second pressure blocks (23) can pass.

6. A hydraulic cylinder with double buffering according to claim 1, characterized in that: On the outer wall of the cylinder body (1), a first sliding support seat (8) corresponding one-to-one to the first sliding rod (32) and a second sliding support seat (9) corresponding one-to-one to the second sliding rod (42) are fixedly provided. The first support seat is provided with a first sliding hole through which the first sliding rod (32) can pass and forms a sliding fit, and the second support seat is provided with a second sliding hole through which the second sliding rod (42) can pass and forms a sliding fit. The first sliding support seat (8) forms a sliding fit with the first sliding rod (32) through the first sliding hole, and the second sliding support seat (9) forms a sliding fit with the second sliding rod (42) through the second sliding hole.

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