Positioning jig, connecting rod eccentric assembly and compressor or pump

Abstract

The utility model relates to a positioning jig, a connecting rod eccentric assembly and a compressor or a pump, and the connecting rod eccentric assembly and the compressor or the pump are adjusted through the positioning jig. The first jig is connected with a first connecting rod eccentric assembly on the compressor or the pump in a matched mode, and the second jig is connected with a second connecting rod eccentric assembly on the compressor or the pump in a matched mode. Each of the first connecting rod eccentric assembly and the second connecting rod eccentric assembly comprises an eccentric wheel and a connecting rod; an eccentric column on the eccentric wheel is rotationally connected with the driving end of the connecting rod through a bearing; the first jig is matched with the first connecting rod eccentric assembly, and an eccentric column of the eccentric wheel is locked to be located at the descending limit position. The second jig is matched with the second connecting rod eccentric assembly, and an eccentric column of the eccentric wheel is locked to be located at the ascending limit position. The eccentric wheels on the first connecting rod eccentric assembly and the second connecting rod eccentric assembly can be adjusted to be 180 degrees in advance and can be directly fixed and assembled.

Description

Technical Field

[0001] The utility model relates to the field of compressors or pumps, in particular to a positioning fixture, a connecting rod eccentric component and a compressor or pump. Background Art

[0002] In the technical fields of oil-free air compressors, oil-free vacuum pumps, oil-free air pumps, and micro compressors, both ends of the motor shaft of such products will have shaft extensions, which are connected to a pair of connecting rod eccentric assemblies respectively. The two connecting rod eccentrics move up and down respectively, that is, when the connecting rod eccentric assembly on one side moves upward, the connecting rod eccentric assembly on the other side moves downward. This movement is mainly used for dynamic balancing to reduce product vibration. In order to achieve this movement, when the connecting rod eccentric assembly is connected to the motor shaft, the positions of the two eccentrics differ by 180 degrees along the rotation direction of the motor shaft. The connecting rod eccentric assembly and the motor shaft are generally connected by set screws.

[0003] Conventional motor shafts have a flat surface machined at each end (see Fig.10 , a in the figure is the processed plane), which are set at positions 180 degrees apart in the rotation direction of the motor shaft. The set screws used to connect the connecting rod eccentric wheel assembly and the motor shaft need to be aligned with the plane and locked. There are two common ways to align the plane:

[0004] Method 1: Visual inspection, by visual inspection, to see whether the set screw is perpendicular to the plane of the shaft head when it is tightened;

[0005] Method 2: Use a fixture (see Fig.11 In the figure, b is the profiling fixture of the eccentric wheel, and a is the plane milled out of the motor shaft). Align the shaft head plane with the locking screws of the connecting rod eccentric wheel assembly, and then lock the locking screws.

[0006] For the design of conventional motor shafts, visual inspection without a jig will cause great installation inconsistencies. After installation, the positions of the two eccentric wheels will differ by 180 degrees along the rotation direction of the motor shaft, resulting in a large deviation from the target position, which will ultimately cause large vibrations in the finished product.

[0007] For the design of conventional motor shafts, when using a jig for installation, since it is necessary to align the plane position of the motor shaft during installation, in the actual installation process, it is often necessary to rotate the shaft, which slows down the installation speed and affects the efficiency of product assembly.

[0008] In addition, the conventional motor shaft has a flat surface on each side, so the center of gravity of the rotation is not at the center of the shaft. When running at high speed, the dynamic balance performance is relatively poor. Machining the flat surface requires additional processing costs, which is relatively expensive. Utility Model Content

[0009] The first purpose of the utility model is to provide a positioning fixture, which can pre-adjust the eccentric wheels on the first connecting rod eccentric assembly and the second connecting rod eccentric assembly to a difference of 180° from each other, while improving the assembly angle accuracy, it also eliminates the milling process of the motor output shaft, effectively shortens the processing cycle, and simplifies the assembly and debugging process.

[0010] The technical solution for achieving the first object of the utility model is as follows: the positioning fixture in the utility model comprises a first fixture connected with a first connecting rod eccentric assembly on a compressor or a pump, and a second fixture connected with a second connecting rod eccentric assembly on the compressor or the pump; the first connecting rod eccentric assembly and the second connecting rod eccentric assembly both comprise an eccentric wheel and a connecting rod; the eccentric column on the eccentric wheel is rotatably connected with the driving end of the connecting rod through a bearing;

[0011] The first fixture comprises a first body, and at least one first positioning column and a first fool-proofing portion are provided on the end surface of the first body against which the driving end of the connecting rod is pressed; the first positioning column is used to cooperate with the positioning hole of the driving end of the corresponding connecting rod for positioning; the first fool-proofing portion is used to cooperate with the driving end of the corresponding connecting rod for positioning; the first body and the end surface against which the driving end of the corresponding connecting rod is pressed are also provided with a first positioning portion that crosses the connecting rod and cooperates with the eccentric wheel for positioning to ensure that the eccentric column is at the downward limit position;

[0012] The second fixture includes a second body, and at least one second positioning column and a second anti-foolproofing portion are provided on the end surface of the second body against which the driving end of the connecting rod is pressed; the second positioning column is used to cooperate with the positioning hole of the driving end of the corresponding connecting rod for positioning; the second anti-foolproofing portion is used to cooperate with the driving end of the corresponding connecting rod for positioning; the second body and the end surface against which the driving end of the corresponding connecting rod is pressed are also provided with a second positioning portion that passes over the connecting rod and cooperates with the eccentric wheel for positioning to ensure that the eccentric column is in the upward limit position.

[0013] Furthermore, the first positioning portion includes two first extension portions which are symmetrically arranged and pass over the two sides of the corresponding connecting rod, and a first locking space is formed between the two first extension portions, which can only position and lock the eccentric wheel when the eccentric column is in the downward limit position;

[0014] The second positioning portion includes two second extension portions which are symmetrically arranged and extend over the two sides of the corresponding connecting rods, and a second locking space which can only be used to position and lock the eccentric wheel when the eccentric column is in the upward limit position is formed between the two second extension portions.

[0015] Further, the end surfaces opposite to the two first extensions are first positioning surfaces; the end of the first positioning surface away from the first body is a first free end; the first free end is provided with a first guide surface; the first guide surface includes a first arc surface naturally connected with the first positioning surface, and a first inclined surface naturally connected with the first arc surface; the two first guide surfaces form a flared opening of the first locking space;

[0016] The end surfaces opposite to the two second extension parts are second positioning surfaces; the end of the second positioning surface away from the second body is a second free end; the second free end is provided with a second guide surface; the second guide surface includes a second arc surface naturally connected to the second positioning surface, and a second inclined surface naturally connected to the second arc surface; the two second guide surfaces form a flared opening of the second locking space.

[0017] Furthermore, a magnetic sheet for magnetically adsorbing to the bearing is fixedly provided on the first body and the second body; and an avoidance hole for avoiding the eccentric column is provided on the magnetic sheet.

[0018] Furthermore, the first positioning column and the second positioning column are both flat cylinders; and the positioning hole at the driving end of the connecting rod is a round hole.

[0019] Furthermore, the first fool-proofing portion and the second fool-proofing portion both extend toward the corresponding connecting rod and are used to pass through from below the corresponding connecting rod.

[0020] The second object of the utility model is to provide a connecting rod eccentric assembly, which pre-adjusts the position of the eccentric wheel through a first fixture and a second fixture, can be directly fixedly connected to the output shaft of a dual-output motor without rotating the shaft, has a fast installation speed and good effect.

[0021] The technical solution for achieving the second purpose of the utility model is: the connecting rod eccentric assembly in the utility model includes the above-mentioned positioning fixture, the first connecting rod eccentric assembly and the second connecting rod eccentric assembly; the eccentric wheels of the first connecting rod eccentric assembly and the second connecting rod eccentric assembly both include a connecting hole that is transmission-connected to the output shaft of the dual-output motor, and the eccentric column is located on the end face of the eccentric wheel facing the connecting rod; the eccentric wheel is provided with a fan-shaped portion; the fan-shaped portion and the eccentric column are respectively located on both sides of the connecting hole; the first positioning portion is positioned and matched with the fan-shaped portion of the first connecting rod eccentric assembly to ensure that the eccentric column is in the downward limit position; the second positioning portion is positioned and matched with the fan-shaped portion of the second connecting rod eccentric assembly to ensure that the eccentric column is in the upward limit position; the eccentric wheel on the first connecting rod eccentric assembly installed with the first fixture and the eccentric wheel on the second connecting rod eccentric assembly installed with the second fixture, when the connecting holes of the two are on the same axis, differ by 180° in the rotation direction along the same axis.

[0022] The third object of the utility model is to provide a compressor or a pump.

[0023] The technical solution for achieving the third object of the utility model is: the compressor or pump in the utility model comprises a dual-output shaft motor; the output shafts at both ends of the dual-output shaft motor are respectively installed with the above-mentioned first connecting rod eccentric assembly and the second connecting rod eccentric assembly; it is characterized in that: the first connecting rod eccentric assembly and the second connecting rod eccentric assembly are respectively equipped with the above-mentioned first fixture and second fixture for removing the first connecting rod eccentric assembly and the second connecting rod eccentric assembly after being fixed to the corresponding output shaft;

[0024] The eccentric wheel is provided with a fixed threaded through hole connected to its connecting hole; the output shaft of the dual output shaft motor passes through the connecting hole of the eccentric wheel on the corresponding side; the eccentric wheel is fixedly connected to the output shaft after being tightened against the corresponding output shaft by a set screw matched with the fixed threaded through hole; the output shaft is a cylinder.

[0025] The utility model has positive effects: (1) The utility model can position and fix the first connecting rod eccentric assembly and the second connecting rod eccentric assembly at positions 180 degrees apart in the rotation direction of the output shaft by using a positioning fixture without setting a plane on the output shaft, thereby eliminating the process of milling the output shaft plane, effectively shortening the processing cycle, and simplifying the assembly and debugging process.

[0026] (2) Since the output shaft of the present invention does not require a flat surface to be machined, the machining cost of the output shaft is reduced; at the same time, at high speeds, the rotational center of gravity of the output shaft and the center of the output shaft completely coincide with each other, resulting in a good dynamic balancing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to make the content of the utility model easier to understand, the utility model is further described in detail according to specific embodiments and in conjunction with the accompanying drawings.

[0028] Figure 1 It is a structural schematic diagram of the first fixture in the utility model;

[0029] Figure 2 It is a structural schematic diagram of the second fixture in the utility model;

[0030] Figure 3 It is an enlarged schematic diagram of the first guide surface in the utility model;

[0031] Figure 4 It is a structural schematic diagram of the upper eccentric column of the first connecting rod eccentric assembly in the utility model being located at the downward limit position;

[0032] Figure 5 It is a structural schematic diagram of the upper eccentric column of the second connecting rod eccentric assembly in the utility model being located at the upper limit position;

[0033] Figure 6 It is a schematic diagram of assembling the first fixture and the first connecting rod eccentric assembly in the utility model;

[0034] Figure 7 It is a schematic diagram of assembling the second fixture and the second connecting rod eccentric assembly in the utility model;

[0035] Figure 8 It is a schematic diagram of the assembly of the compressor or pump in the utility model;

[0036] Fig. 9 This is a schematic diagram of the connection between the eccentric wheel and the output shaft in the utility model;

[0037] Fig.10 It is a schematic diagram of the positioning of the connecting rod eccentric wheel assembly on the conventional motor shaft;

[0038] Fig.11 The utility model is a positioning tool for a connecting rod eccentric wheel assembly on a conventional motor shaft. DETAILED DESCRIPTION

[0039] See Figures 1 to 5 The positioning fixture of the utility model comprises a first fixture 1 which is connected with a first connecting rod eccentric assembly 3 on a compressor or a pump, and a second fixture 2 which is connected with a second connecting rod eccentric assembly on a compressor or a pump; the first connecting rod eccentric assembly and the second connecting rod eccentric assembly both comprise an eccentric wheel 3 and a connecting rod 4; an eccentric column 31 on the eccentric wheel 3 is rotatably connected with a driving end 41 of the connecting rod 4 through a bearing 5;

[0040] The first fixture 1 comprises a first body, and two first positioning columns 11 and a first fool-proof portion 12 are provided on the end surface of the first body against which the driving end 41 of the connecting rod 4 is pressed; the first positioning column 11 is used to cooperate with the positioning hole 42 of the corresponding driving end 41 of the connecting rod 4 for positioning; the first fool-proof portion 12 is used to cooperate with the corresponding driving end 41 of the connecting rod 4 for positioning; the first body and the end surface against which the driving end 41 of the corresponding connecting rod 4 is pressed are also provided with a first positioning portion 13 that passes over the connecting rod 4 and cooperates with the eccentric wheel 3 for positioning to ensure that the eccentric column 31 is in the downward limit position;

[0041] The second fixture 2 includes a second body, and two second positioning columns 21 and a second anti-foolproofing portion 22 are provided on the end surface of the second body against which the driving end 41 of the connecting rod 4 is pressed; the second positioning column 21 is used to cooperate with the positioning hole 42 of the corresponding driving end 41 of the connecting rod 4 for positioning; the second anti-foolproofing portion 22 is used to cooperate with the corresponding driving end 41 of the connecting rod 4 for positioning; the second body and the corresponding driving end 41 of the connecting rod 4 are also provided with a second positioning portion 23 that passes over the connecting rod 41 and cooperates with the eccentric wheel 3 for positioning to ensure that the eccentric column 31 is in the upward limit position.

[0042] The first positioning portion 13 includes two first extension portions which are symmetrically arranged and pass over the two sides of the corresponding connecting rod 4, and a first locking space is formed between the two first extension portions, which can only position and lock the eccentric wheel 3 when the eccentric column 31 is in the downward limit position;

[0043] The second positioning portion 23 includes two second extension portions which are symmetrically arranged and extend from both sides of the corresponding connecting rod, and a second locking space is formed between the two second extension portions, which can only position and lock the eccentric wheel 3 when the eccentric column 31 is in the upward limit position.

[0044] The end surfaces opposite to the two first extensions are first positioning surfaces 131; the end of the first positioning surface 131 away from the first body is a first free end; the first free end is provided with a first guide surface 132; the first guide surface 132 includes a first arc surface 132-1 naturally connected with the first positioning surface 131, and a first inclined surface 132-2 naturally connected with the first arc surface 132-1; the two first guide surfaces 132 form a flared opening of the first locking space;

[0045] The end surfaces opposite to the two second extensions are the second positioning surfaces; the end of the second positioning surface away from the second body is the second free end; the second free end is provided with a second guide surface; the second guide surface includes a second arc surface naturally connected with the second positioning surface, and a second inclined surface naturally connected with the second arc surface; the two second guide surfaces form a flared opening of the second locking space. Its structural features can be referred to Figure 3 The composition of the first guide surface presented.

[0046] The first positioning portion 13 and the second positioning portion 23 are located at different positions on the first body or the second body only because of the position of the eccentric wheel 3 to be positioned. The positions of the first positioning column 11 and the first foolproof portion 12 on the first body are consistent with the positions of the second positioning column 21 and the second foolproof portion 22 on the second body.

[0047] A magnetic sheet 6 for magnetically adsorbing to the bearing 5 is fixedly disposed on the first body and the second body; an avoidance hole 61 for avoiding the eccentric column 31 is disposed on the magnetic sheet 6 .

[0048] The first positioning column 11 and the second positioning column 21 are both flat cylinders; the positioning hole 42 of the driving end 41 of the connecting rod 4 is a round hole.

[0049] The first anti-foolproofing portion 12 and the second anti-foolproofing portion 22 both extend toward the corresponding connecting rod 4 and are used to pass through the bottom of the corresponding connecting rod 4. This design allows the first fixture and the second fixture to be placed in reverse, i.e., the first anti-foolproofing portion 12 and the second anti-foolproofing portion 22 are always located at the bottom.

[0050] See Figure 6 and Figure 7The connecting rod eccentric assembly of the utility model comprises the above-mentioned positioning fixture, the first connecting rod eccentric assembly and the second connecting rod eccentric assembly; the eccentric wheel 3 of the first connecting rod eccentric assembly and the second connecting rod eccentric assembly both comprise a connecting hole 32 which is transmission-connected to the output shaft 8 of the dual-output motor 7, and the eccentric column 31 is located on the end face of the eccentric wheel 3 facing the connecting rod 4; the eccentric wheel 3 is provided with a fan-shaped portion 33; the fan-shaped portion 33 and the eccentric column 31 are respectively located on both sides of the connecting hole 32; the first positioning portion 13 is positioned and matched with the fan-shaped portion 33 of the first connecting rod eccentric assembly to ensure that the eccentric column 31 is in the downward limit position; the second positioning portion 23 is positioned and matched with the fan-shaped portion 33 of the second connecting rod eccentric assembly to ensure that the eccentric column 31 is in the upward limit position; the eccentric wheel 3 on the first connecting rod eccentric assembly installed with the first fixture 1 and the eccentric wheel 3 on the second connecting rod eccentric assembly installed with the second fixture 2, when the connecting holes 32 of the two are on the same axis, the rotation direction along the same axis differs by 180°.

[0051] See Figure 8 and Fig. 9 The compressor or pump in the utility model comprises a dual output shaft motor 7; the output shafts 8 at both ends of the dual output shaft motor 7 are respectively installed with the above-mentioned first connecting rod eccentric assembly and the second connecting rod eccentric assembly; the first connecting rod eccentric assembly and the second connecting rod eccentric assembly are respectively equipped with the above-mentioned first fixture 1 and second fixture 2 for removing the first connecting rod eccentric assembly and the second connecting rod eccentric assembly after being fixed to the corresponding output shaft 8;

[0052] The eccentric wheel 3 is provided with a fixed threaded through hole communicated with its connecting hole 32; the output shaft 8 of the dual output shaft motor 7 passes through the connecting hole 32 of the eccentric wheel 3 on the corresponding side; the eccentric wheel 3 is fixedly connected to the output shaft 8 after being tightened against the corresponding output shaft 8 by a set screw 9 matched with the fixed threaded through hole; the output shaft 8 is a cylinder.

[0053] The instructions for use of this utility model are as follows:

[0054] After the first positioning column 11 of the first fixture 1 is aligned with the positioning hole 42 of the connecting rod 4 in the first connecting rod eccentric wheel assembly, it is fitted face to face with the connecting rod 4. During the fitting process, the first positioning portion 13 is close to the fan-shaped portion 33 of the eccentric wheel 3, and the eccentric wheel 3 is positioned by using the first positioning surface 131 with the first guide slope 132. Finally, the first fixture 1 and the bearing 5 are sucked by the magnetic sheet 6 and installed into a whole, that is, the first connecting rod eccentric wheel assembly with the first fixture 1 is installed.

[0055] After the first positioning column 21 of the second fixture 2 is aligned with the positioning hole 42 of the connecting rod 4 in the second connecting rod eccentric wheel assembly, it is fitted face to face with the connecting rod 4. During the fitting process, the second positioning portion 23 is close to the fan-shaped portion 33 of the eccentric wheel 3, and the eccentric wheel 3 is positioned using the second positioning surface with the second guide slope. Finally, the second fixture 1 and the bearing 5 are sucked by the magnetic sheet 6 and installed into a whole, that is, the second connecting rod eccentric wheel assembly with the second fixture 2 is installed.

[0056] Connect the first connecting rod eccentric wheel assembly with the first fixture 1 to the output shaft 8 on one side of the dual output motor 7, and directly tighten the set screws.

[0057] Connect the second connecting rod eccentric wheel assembly equipped with the second fixture 2 to the output shaft 8 on the other side of the dual output motor 7, and directly tighten the set screws.

[0058] Finally, the first fixture 1 and the second fixture 2 are removed, and the positions of the two eccentric wheels 3 are adjusted and installed 180 degrees apart along the rotation direction of the output shaft 8 when the connecting rod eccentric wheel assembly and the output shaft 8 are connected.

[0059] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A positioning fixture; characterized in that: The invention comprises a first fixture which is connected with a first connecting rod eccentric assembly on a compressor or a pump, and a second fixture which is connected with a second connecting rod eccentric assembly on the compressor or the pump; the first connecting rod eccentric assembly and the second connecting rod eccentric assembly both comprise an eccentric wheel and a connecting rod; the eccentric column on the eccentric wheel is rotatably connected with the driving end of the connecting rod through a bearing; The first fixture comprises a first body, and at least one first positioning column and a first fool-proofing portion are provided on the end surface of the first body against which the driving end of the connecting rod is pressed; the first positioning column is used to cooperate with the positioning hole of the driving end of the corresponding connecting rod for positioning; the first fool-proofing portion is used to cooperate with the driving end of the corresponding connecting rod for positioning; the first body and the end surface against which the driving end of the corresponding connecting rod is pressed are also provided with a first positioning portion that crosses the connecting rod and cooperates with the eccentric wheel for positioning to ensure that the eccentric column is at the downward limit position; The second fixture includes a second body, and at least one second positioning column and a second anti-foolproofing portion are provided on the end surface of the second body against which the driving end of the connecting rod is pressed; the second positioning column is used to cooperate with the positioning hole of the driving end of the corresponding connecting rod for positioning; the second anti-foolproofing portion is used to cooperate with the driving end of the corresponding connecting rod for positioning; the second body and the end surface against which the driving end of the corresponding connecting rod is pressed are also provided with a second positioning portion that passes over the connecting rod and cooperates with the eccentric wheel for positioning to ensure that the eccentric column is in the upward limit position.

2. A positioning fixture according to claim 1, characterized in that: The first positioning portion includes two first extension portions which are symmetrically arranged and pass over the two sides of the corresponding connecting rod, and a first locking space which can only be used to position and lock the eccentric wheel when the eccentric column is in the downward limit position is formed between the two first extension portions; The second positioning portion includes two second extension portions which are symmetrically arranged and extend over the two sides of the corresponding connecting rods, and a second locking space which can only be used to position and lock the eccentric wheel when the eccentric column is in the upward limit position is formed between the two second extension portions.

3. A positioning fixture according to claim 2, characterized in that: The end surfaces opposite to the two first extensions are first positioning surfaces; the end of the first positioning surface away from the first body is a first free end; the first free end is provided with a first guide surface; the first guide surface includes a first arc surface naturally connected with the first positioning surface, and a first inclined surface naturally connected with the first arc surface; the two first guide surfaces form a flared opening of the first locking space; The end surfaces opposite to the two second extension parts are second positioning surfaces; the end of the second positioning surface away from the second body is a second free end; the second free end is provided with a second guide surface; the second guide surface includes a second arc surface naturally connected to the second positioning surface, and a second inclined surface naturally connected to the second arc surface; the two second guide surfaces form a flared opening of the second locking space.

4. A positioning fixture according to claim 1, characterized in that: The first body and the second body are both fixedly provided with magnetic sheets for magnetic adsorption with the bearing; the magnetic sheets are provided with avoidance holes for avoiding the eccentric column.

5. A positioning fixture according to claim 1, characterized in that: The first positioning column and the second positioning column are both flat cylinders; the positioning hole at the driving end of the connecting rod is a round hole.

6. A positioning fixture according to claim 1, characterized in that: The first fool-proofing portion and the second fool-proofing portion both extend toward the corresponding connecting rod and are used to pass through the bottom of the corresponding connecting rod.

7. A connecting rod eccentric assembly, characterized in that: It includes the positioning fixture, the first connecting rod eccentric assembly and the second connecting rod eccentric assembly as described in claim 1 or 2 or 3 or 4 or 5 or 6; the eccentric wheels of the first connecting rod eccentric assembly and the second connecting rod eccentric assembly both include a connecting hole that is transmission-connected to the output shaft of the dual-output motor, and the eccentric column is located on the end face of the eccentric wheel facing the connecting rod; the eccentric wheel is provided with a fan-shaped portion; the fan-shaped portion and the eccentric column are respectively located on both sides of the connecting hole; the first positioning portion is positioned and matched with the fan-shaped portion of the first connecting rod eccentric assembly to ensure that the eccentric column is in the downward limit position; the second positioning portion is positioned and matched with the fan-shaped portion of the second connecting rod eccentric assembly to ensure that the eccentric column is in the upward limit position; the eccentric wheel on the first connecting rod eccentric assembly installed with the first fixture and the eccentric wheel on the second connecting rod eccentric assembly installed with the second fixture, when the connecting holes of the two are on the same axis, differ by 180° in the rotation direction along the same axis.

8. A compressor or pump, comprising a dual-output shaft motor; the output shafts at both ends of the dual-output shaft motor are respectively mounted with the first connecting rod eccentric assembly and the second connecting rod eccentric assembly as claimed in claim 7; characterized in that: The first connecting rod eccentric assembly and the second connecting rod eccentric assembly are respectively equipped with the first jig and the second jig as claimed in claim 1 or 2 or 3 or 3 or 5 or 6 for removal after the first connecting rod eccentric assembly and the second connecting rod eccentric assembly are fixed to the corresponding output shaft; The eccentric wheel is provided with a fixed threaded through hole connected to its connecting hole; the output shaft of the dual output shaft motor passes through the connecting hole of the eccentric wheel on the corresponding side; the eccentric wheel is fixedly connected to the output shaft after being tightened against the corresponding output shaft by a set screw matched with the fixed threaded through hole; the output shaft is a cylinder.

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