Automatic lubrication of a mixer gear box

By introducing guiding and restricting mechanisms into the gearbox of the rubber mixing mill, and utilizing structures such as V-shaped plates and liquid outlet pipes, the problem of uneven lubricant distribution was solved, achieving stable flow and uniform distribution of lubricant, thereby improving lubrication efficiency and gearbox operational stability.

CN121139671BActive Publication Date: 2026-02-10NANJING CHUANSHI HEAVY IND TECH CO LTD
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Patent Information

Application Number
CN202511686935.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-11-18
Publication Date
2026-02-10
Estimated Expiration
2045-11-18

AI Technical Summary

Technical Problem

In existing rubber mixing mill gearboxes, lubricating oil is easily blocked by the inner wall of the gearbox during agitation, resulting in insufficient oil supply to the distal gear area, affecting the uniformity and accuracy of lubrication, and reducing lubrication efficiency.

Method used

Design an automatic lubrication gearbox for a rubber mixing machine, comprising a guiding mechanism and a limiting mechanism. By guiding the lubricating oil to distribute evenly, and by setting a V-shaped plate and a liquid outlet pipe in the meshing assembly, the lubricating oil is ensured to flow stably and distribute evenly. The piston frame and tapered hole are used to stabilize the position of the piston plate and reduce shaking.

Benefits of technology

It improves the uniformity of lubricating oil in the gearbox and the accuracy of lubrication position, enhances lubrication efficiency and stability, and ensures stable operation and efficient lubrication of the gearbox.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present application relates to the technical field of gear box, and discloses a rubber mixing machine automatic lubricating gear box, which comprises a main body, and two limiting frames are fixedly connected to the top inner wall of the main body. When the V-shaped plate rotates downward, the lubricating oil will flow downward along the strip-shaped groove in a waterfall manner. At this time, the lubricating oil flowing downward will flow downward on the top of the output shaft, the primary gear shaft, the secondary gear shaft and the output shaft and be evenly distributed on the surface thereof, thereby reducing the situation that the gear area on the distal end of the primary gear shaft, the secondary gear shaft and the output shaft is short of oil supply and lubrication when the output shaft drives the lubricating oil to splash lubrication due to the blockage of the lubricating oil by the inner wall of the main body, improving the uniformity of lubrication and the accuracy of lubrication position of the lubricating oil in the gear box and improving the lubrication efficiency.
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Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gearboxes, in particular to an automatic lubrication gearbox for a rubber mixing machine. BACKGROUND

[0002] A rubber mixing machine is a core device for plasticizing and mixing rubber and is widely used in the production of rubber products such as tires, rubber hoses, and sealing elements. Its gearbox is responsible for the key functions of "speed reduction and torque increase" and "power transmission", directly determining the operation efficiency of the rubber mixing machine and the quality of the products.

[0003] The gearbox of a rubber mixing machine needs to be lubricated when in use. Generally, the lubrication of the gearbox is achieved by injecting lubricating oil into the gearbox, which is stirred by the rotation of the large gear inside the gearbox to splash and lubricate the gears. However, since there are multiple smaller gears in the gearbox in addition to the large gear, the splashing of the lubricating oil is easily blocked and bounced off the inner wall of the gearbox, making it difficult to fall into the far distance. This results in insufficient oil supply in the area of the gears far from the large gear, affecting the uniformity of lubrication and the accuracy of the lubrication position, and reducing the lubrication efficiency. SUMMARY

[0004] The present application aims to provide an automatic lubrication gearbox for a rubber mixing machine to solve the problems mentioned in the background.

[0005] To solve the above technical problems, the present application is achieved by the following technical solutions:

[0006] The present application is an automatic lubrication gearbox for a rubber mixing machine, which includes a main body, two limiting frames fixedly connected to the top inner wall of the main body, and the following components:

[0007] A guide mechanism installed inside the main body for uniformly lubricating the internal structure of the main body during lubrication.

[0008] A limiting mechanism installed on the side wall of the guide mechanism to prevent the guide mechanism from shaking during operation.

[0009] Further, the main body includes:

[0010] A meshing assembly installed inside the main body.

[0011] Further, the guide mechanism includes two fixed rods fixedly connected to the top inner wall of the main body, and the following components:

[0012] A movable assembly installed at the bottom of the two fixed rods.

[0013] The auxiliary assembly is arranged on the side wall of the movable assembly.

[0014] Further, the limiting mechanism comprises two fixed columns fixedly connected to the inner wall of the top of the main body, and further comprises:

[0015] The fixed assembly is arranged on the side wall of the fixed column.

[0016] Further, the engaging assembly comprises an output shaft rotatably connected to the inside of the main body, and the front surface of the output shaft is rotatably penetrated to the outer wall of the main body.

[0017] The outer surface of the output shaft is engagedly connected to a first gear shaft, the outer surface of the first gear shaft is engagedly connected to a second gear shaft, and the outer surface of the second gear shaft is engagedly connected to an output shaft.

[0018] The back surface of the output shaft is rotatably penetrated to the back surface of the main body.

[0019] Further, the movable assembly comprises a V-shaped plate one fixedly connected to the bottom of the two fixed rods, the V-shaped plate one is arranged in an inclined manner, and the side wall of the V-shaped plate one is rotatably connected to a V-shaped plate two.

[0020] Further, the bottom of the V-shaped plate two is provided with a strip-shaped groove, the side of the V-shaped plate two away from the V-shaped plate one is fixedly connected to a spring plate, and the elastic section of the spring plate is fixedly connected to the inner wall of the main body.

[0021] Further, the auxiliary assembly comprises three inclined plates fixedly connected to the side wall of the V-shaped plate two, the side wall of the inclined plate is fixedly connected to three liquid outlet pipes, and the three liquid outlet pipes are arranged at equal distances.

[0022] The liquid outlet pipe is in communication with the side wall of the V-shaped plate two.

[0023] The inner part of the V-shaped plate two is fixedly connected to two cylinders.

[0024] Further, the two fixed columns are symmetrically distributed with one of the cylinders as the center.

[0025] The fixed assembly comprises an inclined frame fixedly connected to the bottom of the fixed column.

[0026] Further, the side wall of the V-shaped plate two is fixedly connected to a piston frame, the side wall of the piston frame is provided with a plurality of conical holes, and the inner part of the piston frame is slidably connected to a piston rod.

[0027] The top of the piston rod is slidably connected between the two limiting frames.

[0028] The present application has the following beneficial effects:

[0029] 1. The application, when the V-shaped plate is rotated downward, the lubricating oil will flow down along the strip-shaped groove in a waterfall manner, at this time the downward flowing lubricating oil will flow down on the top of the output shaft, the primary gear shaft, the secondary gear shaft and the output shaft and can be evenly distributed on the surface, thereby reducing the splashing lubrication of the lubricating oil driven by the output shaft, causing the gear area on the distal end of the primary gear shaft, the secondary gear shaft and the output shaft to be insufficiently supplied and lubricated due to the obstruction of the inner wall of the main body, improving the uniformity of lubrication and the accuracy of the lubrication position of the lubricating oil in the gear box, and improving the lubrication efficiency.

[0030] 2. The application, when the lubricating oil flows slowly after being blocked, the lubricating oil can slowly accumulate on the top of the V-shaped plate and flow down through the strip-shaped groove, by slowing down the flow speed of the oil, the lubricating oil can be prevented from flowing rapidly on the top of the V-shaped plate due to the excessive speed of the output shaft, thereby improving the lubrication stability and continuity of the lubricating oil flowing down, and improving the lubrication efficiency.

[0031] 3. The application, since the outlet of the liquid outlet pipe faces the outlet direction of the strip-shaped groove, when part of the lubricating oil flows down through the strip-shaped groove in a waterfall manner, the flowing lubricating oil through the liquid outlet pipe will collide with the lubricating oil flowing down through the strip-shaped groove, when the two streams of lubricating oil interact and collide on the top of the meshing assembly, the interacting lubricating oil will disperse on the top and diffuse the flow area of the lubricating oil flowing down, by diffusing the lubricating oil on the top of the meshing assembly, the distribution area and uniformity of the lubricating oil on the surface of the meshing assembly structure can be further enhanced, and the lubrication efficiency of the meshing assembly during operation can be further enhanced.

[0032] 4. The application, when the V-shaped plate II appears instantaneous shaking, the shaking of the V-shaped plate II will cause the piston rod to generate a transient pressure on the lubricating oil inside the piston frame, according to the incompressible characteristics of the liquid, when the lubricating oil is extruded instantaneously, the lubricating oil will generate a transient resistance to the shaking of the V-shaped plate II under the resistance of the small hole diameter of the piston frame outer surface taper hole, so that the V-shaped plate II ensures the stability of the position of the V-shaped plate II during operation of the meshing assembly, reduces the shaking of the V-shaped plate II, and ensures the stable falling of the lubricating oil while improving the stability of the main body and the meshing assembly during operation.

[0033] Of course, implementing any product of the application does not necessarily require achieving all the advantages described above at the same time. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the following embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0035] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0036] Figure 2 It is a schematic diagram of the overall partial cross-sectional structure of the present application.

[0037] Figure 3 It is a schematic diagram of the main body half cross-sectional structure of the present application.

[0038] Figure 4 It is a schematic diagram of the movable assembly of the present application.

[0039] Figure 5 It is a schematic diagram of the movable assembly of the present application.

[0040] Figure 6 It is a schematic diagram of the movable assembly of the present application.

[0041] Figure 7 It is a schematic diagram of the movable assembly of the present application. Figure 6 It is an enlarged schematic diagram of A in the present application.

[0042] Figure 8 It is a schematic diagram of the movable assembly of the present application.

[0043] Figure 9 It is a schematic diagram of the fixed column structure of the present application.

[0044] In the drawings, the components represented by each reference numeral are listed as follows:

[0045] In the drawings, the components represented by each reference numeral are listed as follows: 1, main body; 101, limiting frame; 11, engagement assembly; 111, output shaft; 112, first-stage gear shaft; 113, second-stage gear shaft; 114, output shaft; 2, guide mechanism; 201, fixed rod; 21, movable assembly; 211, V-shaped plate one; 212, V-shaped plate two; 213, strip-shaped groove; 214, spring plate; 22, auxiliary assembly; 221, inclined plate; 222, liquid outlet pipe; 223, cylinder; 3, limiting mechanism; 301, fixed column; 31, fixed assembly; 311, inclined frame; 312, piston frame; 313, piston rod. DETAILED DESCRIPTION

[0046] Clearly, the embodiments described are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0047] Please refer to Figure 1 Figure 9 As shown in the figure, the present application is a kind of rubber mixing machine automatic lubrication gearbox, including main body 1, the top inner wall of main body 1 is fixedly connected with two limit frame 101, still including:

[0048] Guide mechanism 2, guide mechanism 2 is installed and arranged in the inside of main body 1, for guiding lubricating oil to carry out uniform lubrication when lubricating the internal structure of main body 1;

[0049] Limiting mechanism 3, limiting mechanism 3 is installed and arranged in the side wall of guide mechanism 2, for preventing guide mechanism 2 from appearing when working.

[0050] Main body 1 includes:

[0051] Engaging assembly 11, engaging assembly 11 is installed and arranged in the inside of main body 1.

[0052] Guide mechanism 2 includes two fixed rods 201 fixedly connected in the top inner wall of main body 1, guide mechanism 2 further includes:

[0053] Movable assembly 21, movable assembly 21 is installed and arranged in the bottom of two fixed rods 201;

[0054] Auxiliary assembly 22, auxiliary assembly 22 is installed and arranged in the side wall of movable assembly 21.

[0055] Limiting mechanism 3 includes two fixed columns 301 fixedly connected in the top inner wall of main body 1, limiting mechanism 3 further includes:

[0056] Fixed assembly 31, fixed assembly 31 is installed and arranged in the side wall of fixed column 301.

[0057] Engaging assembly 11 includes output shaft 111 rotationally connected in the inside of main body 1, the front surface of output shaft 111 rotationally penetrates to the outer wall of main body 1;

[0058] The outer surface of output shaft 111 in the inside of main body 1 is engagedly connected with primary gear shaft 112, the outer surface of primary gear shaft 112 is engagedly connected with secondary gear shaft 113, and the outer surface of secondary gear shaft 113 is engagedly connected with output shaft 114;

[0059] ​The back of the output shaft 114 is rotatable through the back of the main body 1, and the lubricating oil is first delivered into the main body 1 by the staff, then the output shaft 111 is connected with the external driving device, and the output shaft 114 is connected with the external required device, and then the driving device is started to drive the output shaft 111 to rotate.

[0060] The movable assembly 21 comprises a V-shaped plate one 211 fixedly connected at the bottom of the two fixed rods 201, the V-shaped plate one 211 is arranged in an inclined manner, and the side wall of the V-shaped plate one 211 is rotatably connected with a V-shaped plate two 212, when more lubricating oil falls on the surface of the V-shaped plate two 212 under the rotation of the output shaft 111, the V-shaped plate two 212 will rotate downward on the side wall of the V-shaped plate one 211 under the weight of the more lubricating oil and stretch the springs on the spring plate 214.

[0061] The bottom of the V-shaped plate two 212 is provided with a strip-shaped groove 213, the side of the V-shaped plate two 212 away from the V-shaped plate one 211 is fixedly connected with a spring plate 214, and the elastic section of the spring plate 214 is fixedly connected with the inner wall of the main body 1, when part of the lubricating oil flows downward in a waterfall manner through the strip-shaped groove 213, the flowing lubricating oil through the liquid outlet pipe 222 will collide with the lubricating oil flowing downward through the strip-shaped groove 213.

[0062] The auxiliary assembly 22 comprises three inclined plates 221 fixedly connected with the side wall of the V-shaped plate two 212, the side wall of the inclined plate 221 is fixedly connected with three liquid outlet pipes 222, and the three liquid outlet pipes 222 are arranged at equal distances;

[0063] The liquid outlet pipe 222 is in communication with the side wall of the V-shaped plate two 212;

[0064] The inside of the V-shaped plate two 212 is fixedly connected with two cylinders 223, when the lubricating oil flows slowly on the side wall of the V-shaped plate two 212 under the blockage of the cylinders 223 and accumulates, part of the lubricating oil flows downward through the strip-shaped groove 213, and part of the lubricating oil also flows downward through the liquid outlet pipe 222.

[0065] The two fixed columns 301 are symmetrically distributed with the one of the cylinders 223 as the center;

[0066] The fixed assembly 31 comprises an inclined frame 311 fixedly connected at the bottom of the fixed column 301.

[0067] The side wall of the V-shaped plate two 212 is fixedly connected with a piston frame 312, the side wall of the piston frame 312 is provided with a plurality of tapered holes, and the inside of the piston frame 312 is slidably connected with a piston rod 313;

[0068] The top of the piston rod 313 is slidingly connected between the two limiting frames 101, so that the piston rod 313 slides in the piston frame 312, and then, when the lubricating oil flows and accumulates on the surface of the V-shaped plate 212, part of the lubricating oil passes through the tapered hole on the piston frame 312 and enters the piston frame 312.

[0069] In use, first, the staff delivers the lubricating oil into the main body 1, then connects the output shaft 111 with the external driving device and connects the output shaft 114 with the external required device, then starts the driving device to drive the output shaft 111 to rotate, and when the output shaft 111 rotates, it drives the output shaft 114 to rotate through the primary gear shaft 112 and the secondary gear shaft 113, and at the same time, when the output shaft 111 rotates, it stirs the lubricating oil in the main body 1, so that the lubricating oil flows under the driving of the output shaft 111, thereby achieving the purpose of automatic lubrication of the structure in the main body 1.

[0070] When the lubricating oil in the main body 1 is stirred by the output shaft 111, the rapid rotation of the output shaft 111 will roll up the lubricating oil and make it splash upwards, and when the lubricating oil splashes, it will be guided by the V-shaped plate 211 and fall onto the surface of the V-shaped plate 212, and because the flow speed of the lubricating oil is slow, when more lubricating oil falls onto the surface of the V-shaped plate 212 under the rotation of the output shaft 111, the V-shaped plate 212 will be turned downward under the weight of more lubricating oil on the side wall of the V-shaped plate 211 and stretch the springs on the spring plate 214, showing the state in Figure 8 When the V-shaped plate 212 is turned downward, the lubricating oil will flow downward along the strip-shaped groove 213 in a waterfall manner, and at this time, the lubricating oil flowing downward will flow downward on the top of the output shaft 111, the primary gear shaft 112, the secondary gear shaft 113 and the output shaft 114 and can be evenly distributed on the surface thereof, thereby reducing the situation that the gear area of the primary gear shaft 112, the secondary gear shaft 113 and the output shaft 114 at the far end is insufficiently supplied with oil and lubricated due to the blocking of the lubricating oil by the inner wall of the main body 1 when the lubricating oil is splashed and lubricated by the output shaft 111, improving the uniformity of lubrication and the accuracy of lubrication position of the lubricating oil in the gear box, and improving the lubrication efficiency.

[0071] When the lubricating oil splashes on the V-shaped plate two 212 under the rotation of the output shaft 111, the lubricating oil will first contact the inclined frame 311. Since the cylinder 223 is arranged between the two inclined frames 311 and the bottom is provided with the inclined plate 221, when the lubricating oil splashes and flows on the V-shaped plate two 212, the splashing lubricating oil will first contact the inclined frame 311. At the same time, in the subsequent splashing and flowing of the lubricating oil, the lubricating oil will flow in the direction of the cylinder 223 under the blocking of the inclined frame 311 and the guidance of the inclined plate 221. At this time, the lubricating oil will be blocked by the cylinder 223 and flow slowly. When the lubricating oil flows slowly after being blocked, the lubricating oil can slowly accumulate on the top of the V-shaped plate two 212 and flow downward through the strip-shaped groove 213. By slowing down the flow speed of the oil, the situation that the lubricating oil is difficult to flow stably downward through the strip-shaped groove 213 and over the strip-shaped groove 213 due to the too fast flow speed of the lubricating oil on the top of the V-shaped plate two 212 under the rotation of the output shaft 111 can be reduced, the lubricating stability and continuity of the downward flow of the lubricating oil are improved, and the lubricating efficiency is improved.

[0072] When the lubricating oil slowly flows and accumulates on the side wall of the V-shaped plate two 212 under the blocking of the cylinder 223, part of the lubricating oil flows downward through the strip-shaped groove 213, and part of the lubricating oil also flows downward through the liquid outlet pipe 222. Since the outlet of the liquid outlet pipe 222 faces the outlet direction of the strip-shaped groove 213, when part of the lubricating oil flows downward through the strip-shaped groove 213 in a waterfall manner, the lubricating oil flowing through the liquid outlet pipe 222 collides with the lubricating oil flowing downward through the strip-shaped groove 213. When the two streams of lubricating oil interact and collide on the top of the meshing assembly 11, the interacting lubricating oil is dispersed and diffused on the top of the meshing assembly 11 to increase the flow area of the downward flowing lubricating oil. By diffusing the lubricating oil on the top of the meshing assembly 11, the distribution area and uniformity of the lubricating oil on the structure surface in the meshing assembly 11 can be further enhanced, and the lubricating efficiency of the meshing assembly 11 during operation can be further enhanced.

[0073] When the V-shaped plate two 212 rotates downward, the V-shaped plate two 212 will drive the piston frame 312 to rotate, at this time the piston rod 313 will slide in the piston frame 312, and then when the lubricating oil flows and accumulates on the surface of the V-shaped plate two 212, part of the lubricating oil will pass through the tapered hole on the piston frame 312 and enter the piston frame 312, because the meshing assembly 11 inside the main body 1 will vibrate when running and the vibration is easy to cause the V-shaped plate two 212 to appear instantaneous shaking, when the V-shaped plate two 212 appears instantaneous shaking, the shaking of the V-shaped plate two 212 will make the piston rod 313 generate a instantaneous pressure on the lubricating oil inside the piston frame 312, according to the incompressible characteristics of the liquid, when the lubricating oil is extruded, the lubricating oil will generate a instantaneous resistance to the shaking of the V-shaped plate two 212 under the resistance of the small hole diameter of the tapered hole on the outer surface of the piston frame 312, so that the V-shaped plate two 212 ensures the stability of the position of the V-shaped plate two 212 when the meshing assembly 11 runs, reduces the situation that the V-shaped plate two 212 shakes, and through limiting the shaking of the V-shaped plate two 212, the stability of the lubricating oil falling can be ensured, and the stability of the main body 1 and the meshing assembly 11 running is improved.

[0074] The preferred embodiments of the application disclosed above are only used to help explain the application. The preferred embodiments do not describe all the details, nor limit the application to the specific embodiments described. Obviously, according to the content of the specification, many modifications and changes can be made. The specification selects and describes these embodiments in order to better explain the principles and practical applications of the application, so that those skilled in the art can well understand and utilize the application. The application is limited only by the claims and their full scope and equivalents.

Claims

1. An automatic lubrication gearbox for a rubber mixing machine, comprising a main body (1), wherein two limiting frames (101) are fixedly connected to the inner top wall of the main body (1), characterized in that, Also includes: The guide mechanism (2) is installed inside the main body (1) and is used to guide the lubricating oil to lubricate the internal structure of the main body (1) evenly. A limiting mechanism (3) is installed on the side wall of the guiding mechanism (2) to prevent the guiding mechanism (2) from shaking during operation; The main body (1) includes: Engaging assembly (11), which is installed inside the main body (1); The guiding mechanism (2) includes two fixed rods (201) fixedly connected to the inner wall of the top of the main body (1), and the guiding mechanism (2) also includes: The movable component (21) is mounted on the bottom of the two fixed rods (201); An auxiliary component (22) is mounted on the side wall of the active component (21); The limiting mechanism (3) includes two fixed posts (301) fixedly connected to the inner wall of the top of the main body (1), and the limiting mechanism (3) also includes: A fixing component (31) is installed on the side wall of the fixing column (301); The engagement assembly (11) includes an output shaft (111) rotatably connected inside the body (1), the front of the output shaft (111) rotatably extending through to the outer wall of the body (1); The outer surface of the output shaft (111) located inside the main body (1) is meshed with a first-stage gear shaft (112), the outer surface of the first-stage gear shaft (112) is meshed with a second-stage gear shaft (113), and the outer surface of the second-stage gear shaft (113) is meshed with an output shaft (114). The back of the output shaft (114) rotates through to the back of the main body (1); The active component (21) includes a V-shaped plate (211) fixedly connected to the bottom of the two fixed rods (201), the V-shaped plate (211) being inclined, and a V-shaped plate (212) being rotatably connected to the side wall of the V-shaped plate (211).

2. The automatic lubrication gearbox for a rubber mixing mill according to claim 1, characterized in that: The bottom of the second V-shaped plate (212) is provided with a strip groove (213). A spring plate (214) is fixedly connected to the side of the second V-shaped plate (212) away from the first V-shaped plate (211). The elastic section of the spring plate (214) is fixedly connected to the inner wall of the main body (1).

3. The automatic lubrication gearbox for a rubber mixing mill according to claim 2, characterized in that: The auxiliary component (22) includes three inclined plates (221) fixedly connected to the side wall of the V-shaped plate (212), and three liquid outlet pipes (222) are fixedly connected to the side wall of the inclined plate (221), and the three liquid outlet pipes (222) are arranged at equal distances. The liquid outlet pipe (222) is connected to the side wall of the V-shaped plate (212); Among them, the V-shaped plate 2 (212) has two cylinders (223) fixedly connected inside.

4. The automatic lubrication gearbox for a rubber mixing mill according to claim 3, characterized in that: The two fixed columns (301) are symmetrically distributed with one of the cylinders (223) as the center; The fixing component (31) includes an inclined frame (311) fixedly connected to the bottom of the fixing column (301).

5. The automatic lubrication gearbox for a rubber mixing mill according to claim 4, characterized in that: The side wall of the V-shaped plate (212) is fixedly connected to a piston frame (312), and the side wall of the piston frame (312) is provided with several tapered holes. The piston rod (313) is slidably connected inside the piston frame (312). The top of the piston rod (313) is slidably connected between the two limiting frames (101).

Citation Information

Patent Citations

  • Gearbox, automobile power assembly and automobile

    CN114829805A

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