Driving type hydraulic oil cylinder

Abstract

The utility model discloses a driving type hydraulic oil cylinder, which relates to the technical field of hydraulic oil cylinders and comprises a hydraulic oil cylinder main body, a filtering component and a buffering component, the filtering assembly comprises a mounting seat, an oil pump main body, an oil outlet pipe, a filtering seat, a mounting block, a first threaded bolt, a filtering cavity, a limiting plate, a first filtering net, a second threaded bolt and a second filtering net, the mounting seat is mounted at the right end of the hydraulic oil cylinder main body, the oil pump main body is mounted at the upper end of the inner wall of the mounting seat, and the oil outlet pipe is mounted at the left end of the oil pump main body. When hydraulic oil returns to the oil pump body through the oil outlet pipe, the hydraulic oil is filtered through the second filter screen and the first filter screen in the filter cavity and then injected into the oil pump body again, impurities, particles and pollutants in the hydraulic oil can be effectively intercepted and removed, and stable operation of a system is ensured; and faults or abnormities caused by pollution are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic cylinders, in particular to a driving hydraulic 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 using it to achieve reciprocating motion, the deceleration device can be eliminated, and there is no transmission gap and the movement 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] However, when the existing driven hydraulic cylinder circulates the hydraulic oil, a small amount of impurities will appear, and the impurities may be introduced due to wear, corrosion or external pollution in the hydraulic cylinder or system. If they are directly returned to the oil pump body without filtering, these impurities may cause further damage to the internal components of the oil pump.

[0004] Therefore, in view of this, the existing structural deficiencies are studied and improved, and a drive type hydraulic cylinder is proposed. Utility Model Content

[0005] The utility model aims to provide a driving hydraulic cylinder to solve the problem in the background art that impurities inside the hydraulic cylinder are likely to cause damage to the equipment during reciprocating operation.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a driven hydraulic cylinder, comprising a hydraulic cylinder body and a filter assembly and a buffer assembly arranged at the upper end of the hydraulic cylinder body, the filter assembly comprising a mounting seat, an oil pump body, an oil outlet pipe, a filter seat, a mounting block, a first threaded bolt, a filter cavity, a limit plate, a first filter screen, a second threaded bolt and a second filter screen, the right end of the hydraulic cylinder body is mounted with a mounting seat, the upper end of the inner wall of the mounting seat is mounted with the oil pump body, the left end of the oil pump body is mounted with the oil outlet pipe, the filter seat is mounted at the center of the oil outlet pipe, the inside of the filter seat is mounted with a mounting block, the left inside of the mounting block is mounted with a first threaded bolt, the inside of the mounting block is provided with a filter cavity, the inner wall of the filter cavity is mounted with a limit plate, the upper end surface of the limit plate is mounted with a first filter screen, the inner edge of the first filter screen is mounted with a second threaded bolt, and the lower part of the first filter screen is mounted with a second filter screen;

[0007] The buffer assembly includes an oil inlet pipe, an installation cavity, a positioning groove, a positioning bolt, a piston block, a first shock-absorbing spring, a first damping support rod, a first buffer plate, a second shock-absorbing spring, a second damping support rod and a second buffer plate. The lower end of the oil pump body is equipped with an oil inlet pipe, and the interior of the hydraulic cylinder body is provided with an installation cavity. The inner wall of the installation cavity is provided with a positioning groove, and a positioning bolt is installed in the interior of the positioning groove. The piston block is installed on the inner side of the positioning bolt. The first shock-absorbing spring is installed on the left side wall of the piston block, the first damping support rod is installed on the inner ring of the first shock-absorbing spring, and the first buffer plate is installed on the end of the first shock-absorbing spring. The second shock-absorbing spring is installed on the left inner wall of the installation cavity, the second damping support rod is installed on the inner ring of the second shock-absorbing spring, and the second buffer plate is installed on the end of the second shock-absorbing spring.

[0008] Furthermore, rubber rings are installed on both sides of the piston block.

[0009] Furthermore, a reflux cavity is arranged above the installation cavity.

[0010] Furthermore, a piston rod is installed inside the piston block.

[0011] Furthermore, a positioning rod is installed on the inner wall of the mounting block, and a positioning hole is opened on the left side wall of the filter seat.

[0012] Furthermore, reinforcing rods are installed at the four ends of the inner wall of the mounting seat.

[0013] Furthermore, an oil inlet is provided at the upper end of the oil pump body, and an oil outlet is provided at the front end surface of the oil pump body.

[0014] Furthermore, a mounting cover is installed on the right side wall of the mounting seat, and a third threaded bolt is installed inside the mounting cover.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. When the oil returns to the inside of the oil pump body through the oil outlet pipe, it is filtered by the second filter screen and the first filter screen inside the filter cavity and then injected into the oil pump body again, which can effectively intercept and remove impurities, particulate matter and pollutants in the hydraulic oil, ensure the stable operation of the system, and reduce failures or abnormalities caused by pollution.

[0017] 2. In the present invention, the piston block is driven to slide inside the positioning groove through the positioning bolt, which effectively prevents the piston block from producing excessive displacement or rotation under the push of high-pressure liquid, thereby ensuring that the piston block and the piston rod can move along a predetermined trajectory, avoiding the possible shaking or distortion of the piston block during the sliding process, and further improving the accuracy of the piston movement. Then the piston block drives the first buffer plate to move to the left, and then the first buffer plate and the piston block have a certain shock-absorbing and buffering effect through the first shock-absorbing spring and the first damping support rod, and the second buffer plate performs shock-absorbing and buffering inside the installation cavity through the second shock-absorbing spring and the second damping support rod. When the first buffer plate contacts the second buffer plate, simultaneous shock-absorbing and buffering on both sides are realized, ensuring that the piston block can be fully protected during collision, and further improving the durability and stability of the hydraulic cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the device body;

[0019] Figure 2 It is a schematic diagram of the three-dimensional structure inside the filter seat;

[0020] Figure 3 It is a schematic diagram of the internal three-dimensional structure of the installation cavity;

[0021] Figure 4 It is a schematic diagram of the three-dimensional structure of the piston block connection.

[0022] In the figure: 1. hydraulic cylinder body; 2. mounting seat; 201. oil pump body; 202. oil outlet pipe; 203. filter seat; 204. mounting block; 205. first threaded bolt; 206. filter cavity; 207. limit plate; 208. first filter screen; 209. second threaded bolt; 2010. second filter screen; 3. oil inlet pipe; 4. mounting cavity; 401. positioning groove; 402. positioning bolt; 403. piston block; 404. first shock-absorbing spring; 405. first damping support rod; 406. first buffer plate; 407. second shock-absorbing spring; 408. second damping support rod; 409. second buffer plate; 5. rubber ring; 6. reflux cavity; 7. piston rod; 8. mounting cover; 801. third threaded bolt; 9. reinforcing rod; 10. oil inlet; 11. oil outlet; 12. positioning rod; 13. positioning hole. DETAILED DESCRIPTION

[0023] 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.

[0024] Embodiment 1

[0025] like Figure 1 - Figure 4As shown, a driven hydraulic cylinder comprises a hydraulic cylinder body 1 and a filter assembly and a buffer assembly arranged at the upper end of the hydraulic cylinder body 1, the filter assembly comprises a mounting seat 2, an oil pump body 201, an oil outlet pipe 202, a filter seat 203, a mounting block 204, a first threaded bolt 205, a filter cavity 206, a limit plate 207, a first filter screen 208, a second threaded bolt 209 and a second filter screen 2010, the mounting seat 2 is mounted on the right end of the hydraulic cylinder body 1, the oil pump body 201 is mounted on the upper end of the inner wall of the mounting seat 2, the oil outlet pipe 202 is mounted on the left end of the oil pump body 201, the filter seat 203 is mounted at the center of the oil outlet pipe 202, the filter seat 203 is mounted inside the filter seat 203, and the left side of the mounting block 204 is mounted inside A first threaded bolt 205 is provided, a filter cavity 206 is provided inside the mounting block 204, a limit plate 207 is installed on the inner wall of the filter cavity 206, a first filter screen 208 is installed on the upper end surface of the limit plate 207, a second threaded bolt 209 is installed at the inner edge of the first filter screen 208, and a second filter screen 2010 is installed below the first filter screen 208; the buffer assembly includes an oil inlet pipe 3, a mounting cavity 4, a positioning groove 401, a positioning bolt 402, a piston block 403, a first shock-absorbing spring 404, a first damping support rod 405, a first buffer plate 406, a second shock-absorbing spring 407, a second damping support rod 408 and a second buffer plate 409, an oil inlet pipe 3 is installed at the lower end of the oil pump body 201, and a mounting is provided inside the hydraulic cylinder body 1. The mounting cavity 4 has a positioning groove 401 formed on its inner wall, a positioning bolt 402 is installed inside the positioning groove 401, a piston block 403 is installed inside the positioning bolt 402, a first damping spring 404 is installed on the left side wall of the piston block 403, a first damping support rod 405 is installed on the inner ring of the first damping spring 404, a first buffer plate 406 is installed on the end of the first damping spring 404, a second damping spring 407 is installed on the left side inner wall of the mounting cavity 4, a second damping support rod 408 is installed on the inner ring of the second damping spring 407, a second buffer plate 409 is installed on the end of the second damping spring 407, a reflux chamber 6 is arranged above the mounting cavity 4, a piston rod 7 is installed inside the piston block 403, and an oil pump body 2 is arranged 01Inject hydraulic oil into the installation cavity 4 through the oil inlet pipe 3, and then return to the inside of the oil pump body 201 through the reflux cavity 6 and the oil outlet pipe 202, thereby driving the piston to move to the left, completing a working cycle, ensuring that the hydraulic oil circulates between the hydraulic cylinder and the oil pump, and realizing the reciprocating motion of the hydraulic cylinder. This is a relatively mature technology and will not be elaborated on. Then, when it returns to the inside of the oil pump body 201 through the oil outlet pipe 202, it is filtered through the second filter 2010 and the first filter 208 in the filter cavity 206 and then injected into the oil pump body 201 again, which can effectively intercept and remove impurities, particulate matter and pollutants in the hydraulic oil, ensure the stable operation of the system, and reduce failures or abnormalities caused by pollution.Then, the first filter screen 208 is disassembled on the limiting plate 207 through the second threaded bolt 209, so as to facilitate the replacement or cleaning of the first filter screen 208 and the second filter screen 2010. The mounting block 204 is disassembled through the first threaded bolt 205 to clean the filtered impurities. Then, the piston block 403 is driven to slide inside the positioning groove 401 through the positioning bolt 402, so as to effectively prevent the piston block 403 from excessively deflecting or rotating under the push of the high-pressure liquid, thereby ensuring that the piston block 403 and the piston rod 7 can move according to the predetermined trajectory, avoiding the possible shaking or rotation of the piston block 403 during the sliding process. The twisting further improves the accuracy of the piston movement, and then the piston block 403 drives the first buffer plate 406 to move to the left, and then the first buffer plate 406 and the piston block 403 perform a certain shock absorption and buffering effect through the first shock absorbing spring 404 and the first damping strut 405, and the second buffer plate 409 performs shock absorption and buffering inside the installation cavity 4 through the second shock absorbing spring 407 and the second damping strut 408. When the first buffer plate 406 and the second buffer plate 409 are in contact, the shock absorption and buffering on both sides are realized at the same time, ensuring that the piston block 403 can be fully protected when impacting, and further improving the durability and stability of the hydraulic cylinder.

[0026] Furthermore, rubber rings 5 ​​are installed on both sides of the piston block 403. The piston block 403 slides along the inner wall of the installation cavity 4 through the rubber rings 5, which can reduce the friction between the piston block 403 and the inner wall of the installation cavity 4 and help reduce wear.

[0027] Furthermore, a positioning rod 12 is installed on the inner wall of the mounting block 204, a positioning hole 13 is opened on the left side wall of the filter seat 203, and the mounting block 204 is connected to the positioning hole 13 by the positioning rod 12 to ensure the stability of the mounting block 204 when connected.

[0028] Embodiment 2

[0029] like Figure 1 and Figure 4 As shown, a driving hydraulic cylinder proposed by the utility model, compared with the first embodiment, as another implementation mode of the utility model, the four ends of the inner wall of the mounting seat 2 are installed with reinforcing rods 9 for improving the structural strength of the hydraulic cylinder body 1, and the upper end of the oil pump body 201 is provided with an oil inlet 10, and the front end surface of the oil pump body 201 is provided with an oil outlet 11. The oil inlet 10 and the oil outlet 11 are used to replace the hydraulic oil inside the oil pump body 201, which belongs to the prior art and will not be elaborated in detail.

[0030] Furthermore, a mounting cover 8 is installed on the right side wall of the mounting seat 2, and a third threaded bolt 801 is installed inside the mounting cover 8. When the hydraulic cylinder fails or needs regular inspection, the mounting cover 8 can be easily removed to inspect or replace the internal parts.

[0031] Working principle: First, the oil pump body 201 is set to inject hydraulic oil into the installation cavity 4 through the oil inlet pipe 3, and then return to the interior of the oil pump body 201 again through the reflux chamber 6 and the oil outlet pipe 202, thereby driving the piston to move to the left, completing a working cycle, ensuring that the hydraulic oil circulates between the hydraulic cylinder and the oil pump, and realizing the reciprocating motion of the hydraulic cylinder. This is a relatively mature technology at present and will not be elaborated in detail. Then, when returning to the interior of the oil pump body 201 through the oil outlet pipe 202, it is filtered by the second filter screen 2010 and the first filter screen 208 in the filter cavity 206 and then injected into the oil pump body 201 again, which can effectively intercept and remove impurities, particulate matter and pollutants in the hydraulic oil, ensure the stable operation of the system, and reduce faults or abnormalities caused by pollution. Then, the first filter screen 208 is disassembled on the limit plate 207 through the second threaded bolt 209, which is convenient for replacing or cleaning the first filter screen 208 and the second filter screen 2010. The mounting block 204 is disassembled through the first threaded bolt 205 to realize The filtered impurities are cleaned, and then the piston block 403 is driven to slide inside the positioning groove 401 through the positioning bolt 402, effectively preventing the piston block 403 from being excessively offset or rotated under the push of the high-pressure liquid, thereby ensuring that the piston block 403 and the piston rod 7 can move according to the predetermined trajectory, avoiding the possible shaking or distortion of the piston block 403 during the sliding process, and further improving the accuracy of the piston movement. Then the piston block 403 drives the first buffer plate 406 to move to the left, and then the first buffer plate 406 and the piston block 403 have a certain shock-absorbing and buffering effect through the first shock-absorbing spring 404 and the first damping support rod 405, and the second buffer plate 409 performs shock-absorbing and buffering in the installation cavity 4 through the second shock-absorbing spring 407 and the second damping support rod 408. When the first buffer plate 406 contacts the second buffer plate 409, simultaneous shock-absorbing and buffering on both sides are achieved, ensuring that the piston block 403 can be fully protected during collision, further improving the durability and stability of the hydraulic cylinder.

[0032] This is how this type of drive hydraulic cylinder works.

[0033] The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A driven hydraulic cylinder, comprising a hydraulic cylinder body (1) and a filter assembly and a buffer assembly arranged at the upper end of the hydraulic cylinder body (1), characterized in that: The filter assembly comprises a mounting seat (2), an oil pump body (201), an oil outlet pipe (202), a filter seat (203), a mounting block (204), a first threaded bolt (205), a filter cavity (206), a stop plate (207), a first filter screen (208), a second threaded bolt (209) and a second filter screen (2010); the mounting seat (2) is mounted on the right end of the hydraulic cylinder body (1); the oil pump body (201) is mounted on the upper end of the inner wall of the mounting seat (2); the oil outlet pipe (202) is mounted on the left end of the oil pump body (201); the center of the oil outlet pipe (202) is A filter seat (203) is installed, a mounting block (204) is installed inside the filter seat (203), a first threaded bolt (205) is installed inside the left side of the mounting block (204), a filter cavity (206) is opened inside the mounting block (204), a limit plate (207) is installed on the inner wall of the filter cavity (206), a first filter screen (208) is installed on the upper end surface of the limit plate (207), a second threaded bolt (209) is installed at the inner edge of the first filter screen (208), and a second filter screen (2010) is installed below the first filter screen (208); The buffer assembly comprises an oil inlet pipe (3), a mounting cavity (4), a positioning groove (401), a positioning bolt (402), a piston block (403), a first damping spring (404), a first damping support rod (405), a first buffer plate (406), a second damping spring (407), a second damping support rod (408) and a second buffer plate (409); an oil inlet pipe (3) is mounted at the lower end of the oil pump body (201); a mounting cavity (4) is arranged inside the hydraulic cylinder body (1); a positioning groove (401) is arranged on the inner wall of the mounting cavity (4); a positioning bolt (402) is mounted inside the positioning groove (401); A bolt (402) is provided, a piston block (403) is installed on the inner side of the positioning bolt (402), a first shock absorbing spring (404) is installed on the left side wall of the piston block (403), a first damping support rod (405) is installed on the inner ring of the first shock absorbing spring (404), a first buffer plate (406) is installed on the end of the first shock absorbing spring (404), a second shock absorbing spring (407) is installed on the left side inner wall of the installation cavity (4), a second damping support rod (408) is installed on the inner ring of the second shock absorbing spring (407), and a second buffer plate (409) is installed on the end of the second shock absorbing spring (407).

2. A driving hydraulic cylinder according to claim 1, characterized in that: Rubber rings (5) are installed on both sides of the piston block (403).

3. A driving hydraulic cylinder according to claim 1, characterized in that: A reflux cavity (6) is provided above the installation cavity (4).

4. A driving hydraulic cylinder according to claim 1, characterized in that: A piston rod (7) is installed inside the piston block (403).

5. The driving hydraulic cylinder according to claim 1, characterized in that: A positioning rod (12) is installed on the inner wall of the mounting block (204), and a positioning hole (13) is opened on the left side wall of the filter seat (203).

6. A driving hydraulic cylinder according to claim 1, characterized in that: Reinforcement rods (9) are installed at the four ends of the inner wall of the mounting seat (2).

7. The driving hydraulic cylinder according to claim 1, characterized in that: An oil inlet (10) is provided at the upper end of the oil pump body (201), and an oil outlet (11) is provided at the front end surface of the oil pump body (201).

8. The driving hydraulic cylinder according to claim 1, characterized in that: A mounting cover (8) is installed on the right side wall of the mounting seat (2), and a third threaded bolt (801) is installed inside the mounting cover (8).

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