Paper separating machine

By designing the upper and lower height adjustment mechanism and the left and right position adjustment mechanism in the paper separator, the problem that the existing paper separator cannot adjust the position of the cutter is solved, and adapting to different paper characteristics and improving cutting accuracy is achieved.

CN222593029UActive Publication Date: 2025-03-11CHONGQING YAOXIN PACKAGING PROD CO LTD
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Patent Information

Application Number
CN202421424109.3
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-06-21
Publication Date
2025-03-11
Estimated Expiration
2034-06-21

AI Technical Summary

Technical Problem

Existing paper dividers cannot adjust the position and angle of the cutter and cannot adapt to paper of different sizes, shapes or thicknesses, limiting their application range and resulting in a decrease in cutting accuracy.

Method used

A paper splitter is designed, including an upper and lower height adjustment mechanism and a left and right position adjustment mechanism. Through the control of the drive motor and hydraulic cylinder, the precise vertical and horizontal position adjustment of the electric cutter is realized to adapt to paper of different thicknesses and widths.

Benefits of technology

It realizes accurate adjustment of the position of the electric cutter, adapts to different paper characteristics, improves cutting accuracy and flexibility, and meets diverse production needs.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a paper separating machine which belongs to the technical field of automatic mechanical equipment and comprises a paper separating box, vertical height adjusting mechanisms and a movable door, the vertical height adjusting mechanisms are arranged at the left end and the right end of an inner cavity of the paper separating box, and each vertical height adjusting mechanism comprises a fixing block, a driving motor, a supporting plate, a threaded rod, a guide rail, a sliding block, a round hole and a threaded groove. The fixing blocks are fixedly mounted at the tops and bottoms of the left and right ends of an inner cavity of the paper distribution box, the driving motors are fixedly mounted at the bottoms of the fixing blocks, and the supporting plates are fixedly mounted at the bottoms of the driving motors and fixedly connected with the paper distribution box. The vertical height adjusting mechanism is arranged, the threaded rod can be rotated by controlling the driving motor in the using process of the device, so that the sliding block moves up and down along the guide rail, and the vertical position of the electric cutter can be accurately adjusted according to needs; therefore, paper with different thicknesses can be adapted or cutting with different depths can be realized.
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Description

Technical Field

[0001] The utility model belongs to the technical field of automated mechanical equipment, and in particular relates to a paper separator. Background Art

[0002] The packaging box paper separator is an automated mechanical equipment specially used for processing cardboard materials. It is mainly used in carton manufacturing and packaging industries. The function of this machine is to cut and layer large rolls of cardboard or corrugated cardboard according to predetermined sizes and shapes so that they can be subsequently processed into packaging boxes of various specifications. The application of packaging box paper separators has greatly improved the efficiency and quality of carton production, reduced manual operations, and reduced production costs. It is one of the indispensable equipment in the modern packaging industry.

[0003] The existing paper separators are unable to adjust the position and angle of the cutter and are unable to adapt to papers of different sizes, shapes or thicknesses, which limits the application scope of the paper separators and makes it difficult to meet diverse production needs, resulting in reduced cutting accuracy and affecting cutting quality. For irregularly shaped papers, the fixed-position cutter may not be able to achieve precise cutting. Utility Model Content

[0004] The purpose of the utility model is to provide a paper separator, aiming to solve the problems raised in the above background technology.

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

[0006] A paper sorter comprises a paper sorting box, an up and down height adjustment mechanism and a movable door, wherein the up and down height adjustment mechanism is arranged at the left and right ends of an inner cavity of the paper sorting box, and the up and down height adjustment mechanism comprises a fixed block, a drive motor, a support plate, a threaded rod, a guide rail, a slider, a round hole and a threaded groove, the fixed block is fixedly installed at the top and bottom of the left and right ends of the inner cavity of the paper sorting box, the drive motor is fixedly installed at the bottom of the fixed block, and the support plate is fixedly installed at the bottom of the drive motor and is fixedly connected to the paper sorting box.

[0007] As a preferred solution of the utility model, the threaded rod is rigidly connected to the input end of the driving motor and movably connected at the middle position of the inner side of the fixed block, the guide rail is fixedly installed on the front and back sides of the inner side of the fixed block, the slider is movably connected to the surface of the guide rail, the circular holes are opened at the left and right ends of the inner side of the slider, the circular holes are movably connected to the guide rail, the threaded groove is opened at the middle position of the inner side of the slider, and the threaded groove is threadedly connected to the threaded rod.

[0008] As a preferred solution of the utility model, a left-right position adjustment mechanism is arranged on the inner side of the slider, and the left-right position adjustment mechanism includes a fixed plate, a slide groove, a rectangular groove, a limit plate, a slide plate and a hydraulic cylinder. The fixed plate is fixedly installed on the inner side of the slider, the fixed plate is movably connected to the carton, and the slide groove is opened on the inner side of the fixed plate.

[0009] As a preferred solution of the utility model, the rectangular groove is opened on the front and back sides of the inner side of the slide groove, the limit plate is fixedly installed on the right end of the inner side of the rectangular groove, the slide plate is movably connected to the inner side of the rectangular groove, and the hydraulic cylinder is fixedly installed on the left side of the slide plate and fixedly connected to the slide groove.

[0010] As a preferred solution of the utility model, the top and bottom of the skateboard are provided with an angle adjustment mechanism, and the angle adjustment mechanism includes a servo motor, a connecting shaft, and a drive shaft. The servo motor is fixedly installed on the top of the skateboard, the connecting shaft is fixedly installed on the bottom of the skateboard, and the drive shaft is rigidly connected to the input end of the servo motor and movably connected to the lower end of the connecting shaft.

[0011] As a preferred solution of the utility model, a cutting mechanism is provided at the bottom of the driving shaft, and the cutting mechanism includes a fixed frame, a fixed shaft and an electric cutter. The fixed frame is fixedly installed at the bottom of the driving shaft, the fixed shaft is fixedly installed at the bottom inside the fixed frame, and the electric cutter is movably connected to the outer surface of the fixed shaft and is movably connected to the fixed frame.

[0012] As a preferred solution of the utility model, a placement and fixing mechanism is provided at the bottom of the inner cavity of the paper box, and the placement and fixing mechanism includes a support column, a connecting rod and a clamp. The support column is fixedly installed at the bottom of the inner cavity of the paper box, the connecting rod is fixedly installed on the inner side of the support column, and the clamp is fixedly installed on the inner side of the connecting rod.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. This paper splitter, by setting up an up and down height adjustment mechanism, can effectively realize that the device has the function of rotating the threaded rod by controlling the drive motor during use, so that the slider moves up and down along the guide rail, so that the vertical position of the electric cutter can be accurately adjusted as needed to adapt to different thicknesses of paper or to achieve different depths of cutting, providing more flexible and precise cutting operations.

[0015] 2. This paper separator, by setting up a left and right position adjustment mechanism, can effectively realize that the device has the ability to control the hydraulic cylinder to push the slide plate to move left and right in the slide groove during use, so that the horizontal position of the electric cutter can be accurately adjusted according to needs to adapt to papers of different widths or to achieve cutting at different positions, ensuring the stability and accuracy of the electric cutter during horizontal movement, making the position adjustment more precise. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a partial structural diagram of the left and right position adjustment mechanism in the utility model;

[0019] Figure 3 It is a partial structural diagram of the upper and lower height adjustment mechanism in the utility model;

[0020] Figure 4 It is a schematic diagram of the local structure of the placement and fixing mechanism in the utility model;

[0021] Figure 5 This is a structural schematic diagram of the slider in the utility model.

[0022] In the figure: 1. Carton separation; 2. Up and down height adjustment mechanism; 201. Fixed block; 202. Driving motor; 203. Support plate; 204. Threaded rod; 205. Guide rail; 206. Slider; 207. Round hole; 208. Threaded groove; 3. Left and right position adjustment mechanism; 301. Fixed plate; 302. Slide groove; 303. Rectangular groove; 304. Limiting plate; 305. Slide plate; 306. Hydraulic cylinder; 4. Angle adjustment mechanism; 401. Servo motor; 402. Connecting shaft; 403. Driving shaft; 5. Cutting mechanism; 501. Fixed frame; 502. Fixed shaft; 503. Electric cutter; 6. Placement and fixing mechanism; 601. Support column; 602. Connecting rod; 603. Clamp; 7. Movable door. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0024] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0025] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0026] Example 1

[0027] Please refer to the figure Figure 1-5 , which is the first embodiment of the utility model, and this embodiment provides a paper separator, including a paper separator 1, an upper and lower height adjustment mechanism 2 and a movable door 7. The upper and lower height adjustment mechanism 2 is arranged at the left and right ends of the inner cavity of the paper separator 1. The upper and lower height adjustment mechanism 2 includes a fixed block 201, a drive motor 202, a support plate 203, a threaded rod 204, a guide rail 205, a slider 206, a round hole 207 and a threaded groove 208. The fixed block 201 is fixedly installed at the top and bottom of the left and right ends of the inner cavity of the paper separator 1, the drive motor 202 is fixedly installed at the bottom of the fixed block 201, and the support plate 203 is fixedly installed at the bottom of the drive motor 202 and is fixedly connected to the paper separator 1.

[0028] Specifically, the threaded rod 204 is rigidly connected to the input end of the driving motor 202 and movably connected at the middle position of the inner side of the fixed block 201, the guide rail 205 is fixedly installed on the front and back sides of the inner side of the fixed block 201, the slider 206 is movably connected to the surface of the guide rail 205, the circular holes 207 are opened at the left and right ends of the inner side of the slider 206, the circular holes 207 are movably connected to the guide rail 205, the threaded groove 208 is opened at the middle position of the inner side of the slider 206, and the threaded groove 208 is threadedly connected to the threaded rod 204.

[0029] Further: the threaded rod 204 is used to transmit the power of the driving motor 202 to move the slider 206 up and down. The slider 206 can be flexibly connected on the two guide rails 205 to ensure the stable movement of the slider 206 in the vertical direction. The slider 206 can slide on the guide rails 205 to achieve up and down movement. The open circular hole 207 and the threaded groove 208 inside the slider 206 are connected to the external components to ensure that the movement of the slider 206 is precisely aligned. The circular hole 207 is flexibly connected to the guide rail 205 to help the slider 206 move precisely on the guide rail 205. The threaded groove 208 is threadedly connected to the threaded rod 204. Through this connection method, the slider 206 can move up and down along the threaded rod 204 accurately.

[0030] Specifically, a left-right position adjustment mechanism 3 is provided on the inner side of the slider 206, and the left-right position adjustment mechanism 3 includes a fixed plate 301, a slide groove 302, a rectangular groove 303, a limit plate 304, a slide plate 305 and a hydraulic cylinder 306. The fixed plate 301 is fixedly installed on the inner side of the slider 206, the fixed plate 301 is movably connected to the paper box 1, and the slide groove 302 is opened on the inner side of the fixed plate 301.

[0031] Further: the fixed plate 301 provides a stable installation base for the left and right position adjustment mechanism 3, the fixed plate 301 is movably connected to the paper box 1, which means that it can move relative to the paper box 1, and the slide groove 302 provides a track for the slide plate 305 to slide in it, and the design of the slide groove 302 allows the slide plate 305 to move horizontally on the fixed plate 301.

[0032] Specifically, the rectangular groove 303 is opened on the front and back sides of the inner side of the slide groove 302, the limit plate 304 is fixedly installed on the right end of the inner side of the rectangular groove 303, the slide plate 305 is movably connected to the inner side of the rectangular groove 303, and the hydraulic cylinder 306 is fixedly installed on the left side of the slide plate 305 and fixedly connected to the slide groove 302.

[0033] Furthermore: the rectangular groove 303 provides additional guidance and support for the slide plate 305, ensuring the stability and accuracy of the slide plate 305 during movement; the function of the limit plate 304 is to limit the movement range of the slide plate 305 and prevent the slide plate 305 from escaping from the rectangular groove 303; the hydraulic cylinder 306 provides power to adjust the position of the electric cutter 503 by pushing or pulling the slide plate 305; the telescopic movement of the hydraulic cylinder 306 is transmitted to the paper through the slide plate 305 to achieve precise position adjustment.

[0034] Specifically, an angle adjustment mechanism 4 is provided at the top and bottom of the skateboard 305. The angle adjustment mechanism 4 includes a servo motor 401, a connecting shaft 402, and a driving shaft 403. The servo motor 401 is fixedly installed on the top of the skateboard 305, the connecting shaft 402 is fixedly installed on the bottom of the skateboard 305, and the driving shaft 403 is rigidly connected to the input end of the servo motor 401 and movably connected to the lower end of the connecting shaft 402.

[0035] Furthermore: the servo motor 401 can rotate accurately according to the input command, thereby driving the driving shaft 403 to rotate. The connecting shaft 402 serves as a connecting component between the servo motor 401 and the driving shaft 403. The connecting shaft 402 ensures that the rotational motion of the servo motor 401 can be transmitted to the driving shaft 403. The rotation of the driving shaft 403 is controlled by the servo motor 401, which is responsible for transmitting the rotational motion to the electric cutter 503.

[0036] Specifically, a cutting mechanism 5 is provided at the bottom of the driving shaft 403, and the cutting mechanism 5 includes a fixed frame 501, a fixed shaft 502 and an electric cutter 503. The fixed frame 501 is fixedly installed at the bottom of the driving shaft 403, and the fixed shaft 502 is fixedly installed at the bottom of the inner side of the fixed frame 501. The electric cutter 503 is movably connected to the outer surface of the fixed shaft 502 and is movably connected to the fixed frame 501.

[0037] Further: the fixed frame 501 provides a stable installation platform for the cutting mechanism 5, the fixed frame 501 ensures that the cutting mechanism 5 is firmly connected to the drive shaft 403, so that the cutting operation can be carried out accurately, the fixed shaft 502 serves as a support and guide component for the electric cutter 503, the fixed shaft 502 ensures the stability and accuracy of the electric cutter 503 during the cutting process, the electric cutter 503 is a key component for performing the cutting operation, it usually includes a cutting blade and a drive mechanism, the electric cutter 503 can be rotated on the fixed shaft 502 to achieve the task of cutting paper.

[0038] Specifically, a placement and fixing mechanism 6 is provided at the bottom of the inner cavity of the paper box 1, and the placement and fixing mechanism 6 includes a support column 601, a connecting rod 602 and a clamp 603. The support column 601 is fixedly installed at the bottom of the inner cavity of the paper box 1, the connecting rod 602 is fixedly installed on the inner side of the support column 601, and the clamp 603 is fixedly installed on the inner side of the connecting rod 602.

[0039] Further: the support column 601 provides a vertical support point for the placement and fixing mechanism 6. The support column 601 ensures that the height and position of the placement and fixing mechanism 6 are fixed, so that the clamp 603 can effectively clamp the paper. The connecting rod 602 ensures that the position of the clamp 603 in the horizontal direction is stable, so that the clamp 603 can evenly apply pressure to the paper. The clamp 603 usually has an adjustable design, and the clamping force can be adjusted according to the size and thickness of the paper to ensure that the paper is firmly fixed in the inner cavity of the paper distribution box 1.

[0040] Working principle:

[0041] When in use, first open the paper separation box 1 through the movable door 7, and stack the paper to be separated and cut in the clamp 603 at the bottom of the inner cavity of the paper separation box 1. The support column 601 and the connecting rod 602 ensure the stability of the clamp 603 structure. Close the movable door 7, and according to the thickness of the paper, the upper and lower height adjustment mechanism 2 is used, that is, the threaded rod 204 is driven to rotate by the driving motor 202, so that the slider 206 moves up and down along the guide rail 205 to achieve the upper and lower height adjustment of the electric cutter 503, so as to adapt to the paper of different thicknesses. If the left and right position of the electric cutter 503 needs to be adjusted, the left and right position adjustment mechanism 3 can be opened, and the hydraulic cylinder 306 can be used to adjust the left and right position of the electric cutter 503. The slide plate 305 is driven to move left and right in the rectangular groove 303, and the limit plate 304 limits the moving range of the slide plate 305 to prevent the slide plate 305 from escaping from the rectangular groove 303, thereby realizing the adjustment of the left and right position of the electric cutter 503. If the angle of the electric cutter 503 needs to be adjusted, the angle adjustment mechanism 4 can be used to drive the driving shaft 403 to rotate through the servo motor 401, so as to adjust the angle of the electric cutter 503 to adapt to different cutting requirements. The electric cutter 503 in the cutting mechanism 5 is used to perform the required cutting work on the paper. After the cutting is completed, the user can turn off the machine and take out the cut paper for further operation or processing.

[0042] In summary, the fixing block 201, the driving motor 202, the supporting plate 203, the threaded rod 204, the guide rail 205, the slider 206, the round hole 207 and the threaded groove 208 contained in the vertical height adjustment mechanism 2 can realize that the device has the function of rotating the threaded rod 204 by controlling the driving motor 202 during use, so that the slider 206 moves up and down along the guide rail 205, so that the vertical position of the electric cutter 503 can be accurately adjusted as needed to adapt to different thicknesses of paper or to achieve different depths of cutting, providing more flexible and accurate cutting operation. The fixed plate 301, the slide groove 302, the rectangular groove 303, the limit plate 304, the slide plate 305 and the hydraulic cylinder 306 contained in the left and right position adjustment mechanism 3 can realize that the device has the function of pushing the slide plate 305 to move left and right in the slide groove 302 by controlling the hydraulic cylinder 306 during use, so that the horizontal position of the electric cutter 503 can be accurately adjusted as needed to adapt to papers of different widths or to achieve cutting at different positions, thereby ensuring the stability and accuracy of the electric cutter 503 during horizontal movement and making the position adjustment more accurate.

[0043] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and ratio of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangements, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present utility model. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the present invention is not limited to a specific embodiment, but extends to various modifications that still fall within the scope of the appended claims.

[0044] Additionally, in order to provide a concise description of example embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0045] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0046] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A paper separator, characterized in that: The invention comprises a paper separation box (1), an up-down height adjustment mechanism (2) and a movable door (7); the up-down height adjustment mechanism (2) is arranged at the left and right ends of the inner cavity of the paper separation box (1); the up-down height adjustment mechanism (2) comprises a fixed block (201), a driving motor (202), a support plate (203), a threaded rod (204), a guide rail (205), a slider (206), a round hole (207) and a threaded groove (208); the fixed block (201) is fixedly mounted on the top and bottom of the left and right ends of the inner cavity of the paper separation box (1); the driving motor (202) is fixedly mounted on the bottom of the fixed block (201); and the support plate (203) is fixedly mounted on the bottom of the driving motor (202) and is fixedly connected to the paper separation box (1).

2. A paper separator according to claim 1, characterized in that: The threaded rod (204) is rigidly connected to the input end of the drive motor (202) and movably connected to the middle position of the inner side of the fixed block (201); the guide rail (205) is fixedly installed on the front and back sides of the inner side of the fixed block (201); the slider (206) is movably connected to the surface of the guide rail (205); the circular hole (207) is provided at the left and right ends of the inner side of the slider (206); the circular hole (207) is movably connected to the guide rail (205); the threaded groove (208) is provided at the middle position of the inner side of the slider (206); and the threaded groove (208) is threadedly connected to the threaded rod (204).

3. A paper separator according to claim 1, characterized in that: A left-right position adjustment mechanism (3) is arranged on the inner side of the slider (206), and the left-right position adjustment mechanism (3) comprises a fixed plate (301), a slide groove (302), a rectangular groove (303), a limit plate (304), a slide plate (305) and a hydraulic cylinder (306); the fixed plate (301) is fixedly installed on the inner side of the slider (206); the fixed plate (301) is movably connected to the paper box (1); and the slide groove (302) is arranged on the inner side of the fixed plate (301).

4. A paper separator according to claim 3, characterized in that: The rectangular groove (303) is provided on the front and back sides of the inner side of the slide groove (302); the limit plate (304) is fixedly mounted on the right end of the inner side of the rectangular groove (303); the slide plate (305) is movably connected to the inner side of the rectangular groove (303); and the hydraulic cylinder (306) is fixedly mounted on the left side of the slide plate (305) and is fixedly connected to the slide groove (302).

5. A paper separator according to claim 3, characterized in that: An angle adjustment mechanism (4) is provided at the top and bottom of the slide plate (305), and the angle adjustment mechanism (4) comprises a servo motor (401), a connecting shaft (402), and a drive shaft (403). The servo motor (401) is fixedly mounted on the top of the slide plate (305), the connecting shaft (402) is fixedly mounted on the bottom of the slide plate (305), and the drive shaft (403) is rigidly connected to the input end of the servo motor (401) and movably connected to the lower end of the connecting shaft (402).

6. A paper separator according to claim 5, characterized in that: A cutting mechanism (5) is provided at the bottom of the driving shaft (403), and the cutting mechanism (5) comprises a fixed frame (501), a fixed shaft (502) and an electric cutter (503); the fixed frame (501) is fixedly mounted at the bottom of the driving shaft (403); the fixed shaft (502) is fixedly mounted at the bottom of the inner side of the fixed frame (501); and the electric cutter (503) is movably connected to the outer surface of the fixed shaft (502) and is movably connected to the fixed frame (501).

7. A paper separator according to claim 1, characterized in that: A placement and fixing mechanism (6) is provided at the bottom of the inner cavity of the paper distribution box (1), and the placement and fixing mechanism (6) comprises a support column (601), a connecting rod (602) and a clamp (603), wherein the support column (601) is fixedly installed at the bottom of the inner cavity of the paper distribution box (1), the connecting rod (602) is fixedly installed on the inner side of the support column (601), and the clamp (603) is fixedly installed on the inner side of the connecting rod (602).