Assembly tool for press machine and press fitting equipment

Abstract

The utility model discloses an assembling tool for a press machine and press fitting equipment, the assembling tool is used for positioning a gear and a valve rod which are connected in a sleeving mode so that the press machine can conveniently install a pin into the gear and the valve rod, the assembling tool comprises a frame body, a first anti-rotation assembly and a second anti-rotation assembly, and the frame body is used for bearing the valve rod and the gear arranged on the valve rod in a sleeving mode; the first anti-rotation assembly is arranged on the frame body; the first anti-rotation assembly is arranged on the frame body; wherein the first anti-rotation assembly and the second anti-rotation assembly are configured to be capable of sequentially limiting the valve rod and the gear and preventing the valve rod and the gear from rotating around respective axes relative to the frame body, so that the first pin hole of the gear and the second pin hole of the valve rod are kept in an aligned state. According to the assembling tool, the problem that the alignment state of the valve rod and the gear is difficult to keep in the long-term repeated operation process in a manual installation mode can be solved, and therefore the assembling efficiency of the valve rod and the gear is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pin installation tooling, and more specifically, to an assembly tool and press-fitting equipment for a press machine. Background Art

[0002] Intelligent pressure regulating butterfly valves are widely used in the semiconductor industry. They can be used in the preparation of semiconductor materials, wafer processing, photolithography, thin film deposition and other links. Intelligent pressure regulating butterfly valves for semiconductor equipment can achieve precise control of gases and liquids to ensure the stability and precision requirements of semiconductor products. The intelligent pressure regulating butterfly valve includes a controller, a drive mechanism, a valve body, a valve stem passing through the valve body, a gear connected to one end of the valve stem, and a valve plate arranged in the valve body and connected to the other end of the valve stem. The controller controls the rack movement of the drive mechanism to drive the gear to rotate, and drives the valve stem connected to the gear to rotate accordingly, so that the valve plate connected to the valve stem rotates accordingly, so as to achieve precise control of the flow rate and on-off of the gas and liquid passing through the valve body. In order to achieve the precise and reliable connection between the valve stem and the gear, pins are widely used as connectors. A pin is a part that serves as a connection and positioning function. Its diameter is slightly larger than the pin hole it is to match. After assembly, the corresponding pin hole is an interference fit. Therefore, when assembling and disassembling the pin, the verticality of the pin and the pin hole must be ensured, and a certain amount of force is required to complete it.

[0003] When assembling the valve stem and the gear, since their circumferential rotational freedom cannot be restricted, two people are required to cooperate in the installation of the pin. The installation method is usually that one person restricts the valve stem and the gear, and the other uses a press to install the pin into the valve stem and the gear. The manual installation method requires the operator to always maintain a fixed posture to keep the first pin hole on the valve stem and the second pin hole on the gear aligned before the press is pressed. However, the manual installation method is difficult to maintain the alignment of the valve stem and the gear during long-term repetitive operations. Whenever the alignment cannot be maintained, the operator is required to readjust the position of the valve stem and the gear, which seriously affects the assembly efficiency of the valve stem and the gear. Utility Model Content

[0004] In order to solve one or more of the technical problems mentioned above, the utility model provides an assembly tool and a pressing device for a press, which can avoid the problem of difficulty in maintaining the alignment of the valve stem and the gear during long-term repetitive operations during manual installation, thereby improving the assembly efficiency of the valve stem and the gear.

[0005] According to a first aspect of the utility model, there is provided an assembly tool for a press machine, which is used to position a gear and a valve stem that are sleeved together so that the press machine can install a pin into the two. The assembly tool comprises:

[0006] A frame body, which is used to carry the valve stem and the gear sleeved on the valve stem;

[0007] A first anti-rotation component, which is disposed on the frame;

[0008] A second anti-rotation component is disposed on the frame; and

[0009] Wherein, the first anti-rotation assembly and the second anti-rotation assembly are configured to restrict the valve stem and the gear in turn, and prevent the valve stem and the gear from rotating around their respective axes relative to the frame, thereby causing the first pin hole of the gear to remain aligned with the second pin hole of the valve stem.

[0010] Through the assembly tool provided as above, a frame is provided to carry the valve stem and the gear mounted on the valve stem, a first anti-rotation component is provided to prevent the valve stem from rotating around its axis relative to the frame, thereby limiting the first pin hole on the valve stem, and a second anti-rotation component is provided to prevent the gear from rotating around its axis relative to the frame, thereby limiting the second pin hole on the gear, thereby keeping the first pin hole of the gear aligned with the second pin hole of the valve stem, so as to avoid the problem of difficulty in maintaining the alignment of the valve stem and the gear during long-term repeated operations in manual installation, thereby improving the assembly efficiency of the valve stem and the gear.

[0011] Furthermore, the second anti-rotation component includes an accommodating groove fixed relative to the frame and capable of accommodating the gear body of the gear, and a tooth group provided on the groove wall of the accommodating groove and arranged circumferentially, wherein the tooth group is meshed with the gear body of the gear.

[0012] Further, the tooth group includes a first sub-tooth group and a second sub-tooth group arranged at intervals in the accommodating groove, and the first sub-tooth group and the second sub-tooth group can simultaneously engage with the gear body of the gear, and prevent the gear from generating circumferential rotation while preventing the gear from generating radial movement and disengaging from the accommodating groove.

[0013] Furthermore, the assembly tool also includes an axial limiting component, which is arranged on the frame, and the axial limiting component can limit the gear to restrict the gear from moving along its own axial direction.

[0014] Furthermore, the axial limit assembly includes an axial limit member arranged on the side of the gear away from the valve stem, one end of the axial limit member is hinged to the frame body, and the other end thereof is locked with the frame body. In the locked state, the axial limit member prevents the gear from moving in a direction away from the valve stem.

[0015] Furthermore, the frame body includes a supporting portion for supporting the shaft sleeve portion of the gear, and the axial limiting assembly also includes a clamping member arranged on the side of the gear close to the valve stem, the clamping member passes through the supporting portion of the frame body and is connected thereto by a threaded structure, and the clamping member is used to abut against the gear body of the gear to limit the gear from moving in a direction close to the valve stem.

[0016] Furthermore, the first anti-rotation assembly includes an anti-rotation member having one end hinged to the frame body and the other end locked to the frame body, and the anti-rotation member can position the valve stem in a locked state.

[0017] Furthermore, a first plane portion is provided on the anti-rotation member, and the first plane portion can make surface contact with a second plane portion provided on the valve stem, so as to prevent the valve stem from moving along its own axial direction while positioning the valve stem.

[0018] Furthermore, the frame body includes a supporting portion, on which is provided a positioning groove for supporting the shaft sleeve portion of the gear, and on which is also provided a disassembly hole connected to the bottom of the positioning groove, and the disassembly hole is used to fully receive the pin withdrawn from the gear and the valve stem.

[0019] According to the second aspect of the utility model, a press-fitting device is provided, which includes a press and the assembly tool, wherein the assembly tool is arranged in the press-fitting area of ​​the press and is used to position the gear and the valve stem which are socketed with each other, and the press installs the pin into the two.

[0020] By means of the pressing equipment provided as above, the valve stem and the gear are positioned through an assembly tool to align the first pin hole on the valve stem with the second pin hole on the gear, and the pin is installed into the aligned first pin hole and the second pin hole through a press, so as to avoid the problem of difficulty in maintaining the alignment state of the valve stem and the gear during long-term repeated operations in the manual installation method, thereby improving the assembly efficiency of the valve stem and the gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] By reading the detailed description below with reference to the accompanying drawings, the above and other purposes, features and advantages of the exemplary embodiments of the present invention will become easy to understand. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0022] Figure 1 A schematic diagram showing the structure of a gear involved in an embodiment of the utility model is shown;

[0023] Figure 2A schematic structural diagram of a valve stem according to an embodiment of the utility model is shown;

[0024] Figure 3 A schematic diagram showing the structure of an assembly tool provided by an embodiment of the utility model is shown;

[0025] Figure 4 A side view of an assembly tool provided by an embodiment of the utility model is shown;

[0026] Figure 5 A structural schematic diagram of the assembly tool provided by an embodiment of the utility model from another viewing angle is shown.

[0027] 1. frame; 11. supporting portion; 111. positioning groove; 112. disassembly hole; 12. first through hole;

[0028] 2. First anti-rotation component; 21. Anti-rotation member;

[0029] 3. Second anti-rotation assembly; 31. Accommodating groove; 32. Tooth group; 321. First sub-tooth group; 322. Second sub-tooth group;

[0030] 4. Axial limiting assembly; 41. Axial limiting member; 42. Clamping member;

[0031] 100, gear; 101, gear body; 102, shaft sleeve portion; 103, first pin hole; 200, valve stem; 201, second pin hole; 202, second plane portion; 300, pin. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present disclosure.

[0033] Figure 1 1 shows a schematic structural diagram of a gear 100 involved in this embodiment, Figure 2 FIG. 2 shows a schematic diagram of the structure of the valve stem 200 involved in this embodiment. Figure 1 and Figure 2As shown, the gear 100 includes a gear body 101, a shaft sleeve portion 102 and a first pin hole 103 provided on the shaft sleeve portion 102, and a second pin hole 201 is provided on the valve stem 200. When the gear 100 and the valve stem 200 need to be assembled, they need to be installed through two cooperations. The installation method is usually that one person restricts the valve stem 200 and the gear 100, and the other person uses a press to install the pin 300 into the valve stem 200 and the gear 100. The manual installation method requires the operator to always maintain a fixed posture to keep the first pin hole 103 on the valve stem 200 and the second pin hole 201 on the gear 100 aligned before the press is pressed. However, the manual installation method is difficult to maintain the alignment of the valve stem 200 and the gear 100 during long-term repeated operations. Whenever the alignment cannot be maintained, the operator needs to readjust the position of the valve stem 200 and the gear 100, which seriously affects the assembly efficiency of the valve stem 200 and the gear 100.

[0034] In order to solve the above problems, this embodiment provides an assembly tool for a press machine. Figure 3 FIG. 2 shows a schematic diagram of the structure of the assembly tool provided in this embodiment. Figure 3 Combined with Figure 1 and Figure 2 As shown, the assembly tool is used to position the gear 100 and the valve stem 200 that are sleeved with each other so that the press can install the pin 300 into the two. The assembly tool includes a frame 1, a first anti-rotation component 2 and a second anti-rotation component 3. The frame 1 is used to carry the valve stem 200 and the gear 100 sleeved on the valve stem 200. The first anti-rotation component 2 is arranged on the frame 1, and the second anti-rotation component 3 is arranged on the frame 1. Among them, the first anti-rotation component 2 and the second anti-rotation component 3 are configured to restrict the valve stem 200 and the gear 100 in turn, and prevent the valve stem 200 and the gear 100 from rotating around their respective axes relative to the frame 1, thereby prompting the first pin hole 103 of the gear 100 to maintain an alignment with the second pin hole 201 of the valve stem 200.

[0035] By means of the assembly tool provided as above, the frame 1 is provided to carry the valve stem 200 and the gear 100 mounted on the valve stem 200, the first anti-rotation component 2 is provided to prevent the valve stem 200 from rotating around its axis relative to the frame 1, thereby limiting the first pin hole 103 on the valve stem 200, and the second anti-rotation component 3 is provided to prevent the gear 100 from rotating around its axis relative to the frame 1, thereby limiting the second pin hole 201 on the gear 100, thereby keeping the first pin hole 103 of the gear 100 aligned with the second pin hole 201 of the valve stem 200, so as to avoid the problem of difficulty in maintaining the alignment of the valve stem 200 and the gear 100 during long-term repeated operations in a manual installation method, thereby improving the assembly efficiency of the valve stem 200 and the gear 100.

[0036] Figure 4 FIG. 2 shows a side view of the assembly tool provided in this embodiment. Figures 1 to 4 The second anti-rotation component 3 is described as an example. Figures 1 to 3 As shown, the second anti-rotation component 3 may include a receiving groove 31 fixed relative to the frame body 1 and capable of receiving the gear body 101 of the gear 100, and a tooth set 32 ​​provided on the groove wall of the receiving groove 31 and arranged circumferentially. The tooth set 32 ​​is engaged with the gear body 101 of the gear 100, and can prevent the gear 100 from rotating around its axis relative to the frame body 1.

[0037] As a preferred example, Figure 4 Combined with Figure 1-Figure 3 As shown, the tooth set 32 ​​includes a first sub-tooth set 321 and a second sub-tooth set 322 which are arranged in an interval in the receiving groove 31. The first sub-tooth set 321 and the second sub-tooth set 322 can mesh with the gear body 101 of the gear 100 at the same time, and prevent the gear 100 from rotating in the circumferential direction and prevent the gear 100 from moving radially and leaving the receiving groove 31. By setting the first sub-tooth set 321 and the second sub-tooth set 322 at an interval, it is ensured that the first sub-tooth set 321 and the second sub-tooth set 322 can not only prevent the gear 100 from rotating in the circumferential direction, but also prevent the gear 100 from moving radially and leaving the receiving groove 31, and at the same time, the number of teeth on the receiving groove 31 can be reduced, thereby reducing the material for making the tooth set 32.

[0038] Preferably, the accommodating groove 31 is set as a semicircular groove, and the first sub-tooth group 321 and the second sub-tooth group 322 are symmetrically arranged at the selected position of the semicircular groove, and the selected position refers to the position where the straight-line distance between the first sub-tooth group 321 and the second sub-tooth group 322 is the largest. For example, when the circumferential angle corresponding to the groove surface of the semicircular groove is 180°, the first sub-tooth group 321 and the second sub-tooth group 322 are arranged at the two sides of the groove surface of the semicircular groove and the circumferential angles corresponding to the two are approximately 180°. Thus, the gear 100 is prevented from rotating circumferentially while preventing the gear 100 from moving radially and escaping from the accommodating groove 31. In other embodiments, the accommodating groove 31 can also be set as a major arc circular groove or a minor arc circular groove, and the first sub-tooth group 321 and the second sub-tooth group 322 can also be arranged at other positions. This embodiment does not specifically limit this. Any structure that can prevent the gear 100 from rotating circumferentially while preventing the gear 100 from moving radially and escaping from the accommodating groove 31 should be within the protection scope of the disclosed embodiment.

[0039] Furthermore, if Figure 3As shown, the assembly tool further includes an axial limiting assembly 4, which is disposed on the frame 1. The axial limiting assembly 4 can limit the gear 100 to limit the movement of the gear 100 along its own axial direction, thereby cooperating with the first anti-rotation assembly 2 to limit various degrees of freedom of the gear 100, thereby achieving complete positioning of the gear 100.

[0040] As an example, the axial limiter assembly 4 includes an axial limiter 41 arranged on the side of the gear 100 away from the valve stem 200, one end of the axial limiter 41 is hinged to the frame 1, and the other end thereof is locked to the frame 1. When in use, the axial limiter 41 is rotated to make its end away from the hinge enter the first locking area (i.e., horizontal direction) of the frame 1, so that the axial limiter assembly 4 is in a locked state, and the axial limiter 41 can prevent the gear 100 from moving in the direction away from the valve stem 200; the axial limiter 41 can be rotated to make its end away from the hinge disengage from the first locking area and no longer prevent the gear 100 from moving in the direction away from the valve stem 200 (i.e., vertical direction), so that the axial limiter assembly 4 is in an unlocked state, and the gear 100 is removed from the frame 1 in the direction away from the valve stem 200. This is so that the operator can remove the valve stem 200 and the gear 100 after installing the pin 300.

[0041] Preferably, the frame body 1 includes a supporting portion 11 for supporting the sleeve portion 102 of the gear 100, and the axial limiting assembly 4 also includes a clamping member 42 arranged on the side of the gear 100 close to the valve stem 200. The clamping member 42 passes through the supporting portion 11 of the frame body 1 and is connected thereto through a threaded structure. The clamping member 42 is used to abut against the gear body 101 of the gear 100 to limit the gear 100 from moving in a direction close to the valve stem 200.

[0042] By setting the abutment 42 to limit the gear 100 from moving in the direction close to the valve stem 200, and by setting the axial limiter 41 to limit the gear 100 from moving in the direction away from the valve stem 200, the axial limiter assembly 4 limits the gear 100 from moving in its own axial direction. The abutment 42 is connected to the supporting portion 11 by threads, so that the assembly tool can be adapted to the gear 100 with different thickness of the gear body 101 by screwing the abutment 42, thereby improving the applicability of the assembly tool.

[0043] In this embodiment, the gear body 101 is limited to rotate around the axis by providing the tooth set 32 ​​on the accommodating groove 31, and its axial movement is limited by the above-mentioned abutment 42 and axial limiter 41. In other embodiments, the gear 100 can be limited to rotate around the axis by providing a baffle inserted between two adjacent teeth of the gear body 101, and its axial movement can be limited by providing the inner wall of the accommodating groove 31 as a semicircular groove that matches the outer shape of the gear body 101. This embodiment does not impose specific restrictions on the specific structure of the second anti-rotation component 3 and the axial limiter 4. Any structure that can limit the gear 100 should be within the protection scope of the disclosed embodiment.

[0044] Furthermore, the first anti-rotation component 2 includes an anti-rotation member 21 having one end hinged to the frame body 1 and the other end locked to the frame body 1. When in use, when the anti-rotation member 21 rotates to the point where its end away from the hinge enters into a second locking area (i.e., in the horizontal direction) on the frame body 1, the anti-rotation member 21 is in a locked state, and the anti-rotation member 21 can prevent the valve stem 200 from rotating along its axis; when the anti-rotation member 21 rotates to the point where its end away from the hinge leaves the second locking area on the frame body 1, the anti-rotation member 21 is in an unlocked state, and the valve stem 200 can rotate along its axis.

[0045] Preferably, the anti-rotation member 21 is provided with a first plane portion, which can make surface contact with a second plane portion 202 provided on the valve stem 200 to prevent the valve stem 200 from moving along its own axial direction while positioning the valve stem 200 .

[0046] In this embodiment, the anti-rotation member 21 and the valve stem 200 prevent the valve stem 200 from rotating by contacting the first plane portion and the second plane portion 202. In other embodiments, the anti-rotation member 21 may also be a fixed rod, which passes through the second through hole preset on the valve stem 200, and the two ends of the fixed rod are fixed to the frame 1, which can also prevent the valve stem 200 from rotating around its own axis. This embodiment does not specifically limit the specific setting of the anti-rotation member 21, and any structure that can prevent the valve stem 200 from rotating around its own axis is within the protection scope of the disclosed embodiment.

[0047] Specifically, in this embodiment, the anti-rotation member 21 can be made of rubber material, and the friction force when the first plane portion and the second plane portion 202 are in surface contact prevents the valve stem 200 from moving along its own axial direction. In other embodiments, the length of the first plane portion along the axial direction of the valve stem 200 and the length of the second plane portion 202 along the axial direction of the valve stem 200 can be set to the same length so that the two are connected, which can also prevent the valve stem 200 from moving along its own axial direction. This embodiment does not make specific restrictions on this, and any structure that can prevent the valve stem 200 from moving along its own axial direction is within the protection scope of the disclosed embodiment.

[0048] Preferably, the frame body 1 is also provided with a first through hole 12 for the end of the valve stem 200 not provided with the second pin hole 201 to pass through, so as to provide support for the valve stem 200 and maintain the horizontal height of the valve stem 200 so that it can be aligned with the sleeve portion 102 of the gear 100.

[0049] Figure 5 FIG. 4 shows a schematic diagram of the structure of the assembly tool provided in this embodiment from another perspective. Figure 5 Combined with Figure 1-Figure 4 As shown, the frame 1 includes a supporting portion 11, on which is provided a positioning groove 111 for supporting the shaft sleeve portion 102 of the gear 100, and on which is further provided a disassembly hole 112 connected to the bottom of the positioning groove 111, and the disassembly hole 112 is used to completely receive the pin 300 withdrawn from the gear 100 and the valve stem 200, and the positioning groove 111 is provided to support the shaft sleeve portion 102 of the gear 100 so that the gear 100 and the valve stem 200 can be aligned at a horizontal height, and the disassembly hole 112 is provided so that the disassembled pin 300 can completely enter the disassembly hole 112, and there is no need to consider the problem of interference of the disassembled pin 300 with the valve stem 200 or the gear 100, thereby facilitating the operator to disassemble the pin 300 installed on the valve stem 200 and the gear 100.

[0050] Preferably, a receiving cavity for placing the pin 300 is provided in the frame 1, and an opening is provided on the side of the disassembly hole 112 close to the receiving cavity. The receiving cavity is connected to the disassembly hole 112 through the opening, so that the withdrawn pin 300 can enter the receiving cavity through the opening, thereby facilitating the operator to perform the operation of continuously removing the pin 300.

[0051] It should be noted that in this embodiment, the shaft sleeve portion 102 and the gear body 101 can be optionally integrally formed, so there is no need to add other structures to limit the shaft sleeve portion 102. The requirement of limiting the rotation of the gear 100 can be met by only positioning the gear body 101 through the tooth group 32 that accommodates the groove 31.

[0052] It should be noted that, in this embodiment, the supporting portion 11 and the accommodating groove 31 may be provided in an integrated manner. In other embodiments, the supporting portion 11 and the accommodating groove 31 may also be provided in a separate manner, which is not specifically limited in this embodiment.

[0053] This embodiment also provides a press-fitting device, which includes a press and an assembly tool. The assembly tool is arranged in the press-fitting area of ​​the press and is used to position the gear 100 and the valve stem 200 that are sleeved with each other. The press installs the pin 300 into the two.

[0054] By means of the pressing equipment provided as above, the valve stem 200 and the gear 100 are positioned by means of an assembly tool to align the first pin hole 103 on the valve stem 200 with the second pin hole 201 on the gear 100, and the pin 300 is installed into the aligned first pin hole 103 and the second pin hole 201 by means of a press machine, so as to avoid the problem of difficulty in maintaining the alignment state of the valve stem 200 and the gear 100 during long-term repeated operations in a manual installation method, thereby improving the assembly efficiency of the valve stem 200 and the gear 100.

[0055] In the above description of the present application, unless otherwise clearly specified and limited, the terms "fixed", "installed", "connected" or "connected" and the like should be understood in a broad sense. For example, with regard to the term "connection", it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. Therefore, unless otherwise clearly defined in the present application, those skilled in the art can understand the specific meanings of the above terms in the present utility model according to the specific circumstances.

[0056] According to the above description of the present application, those skilled in the art may also understand that the terms used below, such as "up", "down", "front", "back", "left", "right", "length", "width", "thickness", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", "center", "longitudinal", "lateral", "clockwise" or "counterclockwise", etc., which indicate orientation or positional relationships, are based on the orientation or positional relationships shown in the drawings of the present application, and are only for the purpose of facilitating the explanation of the scheme of the present utility model and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have the specific orientation, be constructed and operate in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms cannot be understood or interpreted as limitations on the scheme of the present utility model.

[0057] In addition, the terms "first" or "second" used in this application to refer to numbers or ordinals are only used for descriptive purposes and cannot be understood as explicitly or implicitly indicating relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this application, the meaning of "plurality" is at least two, such as two, three or more, etc., unless otherwise clearly and specifically defined.

[0058] Although multiple embodiments of the utility model have been shown and described herein, it is obvious to those skilled in the art that such embodiments are provided by way of example only. Those skilled in the art may think of many changes, modifications and alternatives without departing from the idea and spirit of the utility model. It should be understood that in the process of practicing the utility model, various alternatives to the embodiments of the utility model described herein may be adopted. The attached claims are intended to define the scope of protection of the utility model, and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. An assembly tool for a press, used for positioning a gear (100) and a valve stem (200) which are sleeved together so that the press can install a pin (300) into the two, characterized in that: The assembly tool comprises: A frame (1) used for carrying the valve stem (200) and the gear (100) sleeved on the valve stem (200); A first anti-rotation component (2) disposed on the frame (1); A second anti-rotation component (3) disposed on the frame (1); The first anti-rotation assembly (2) and the second anti-rotation assembly (3) are configured to restrict the valve stem (200) and the gear (100) in turn, and prevent the valve stem (200) and the gear (100) from rotating around their respective axes relative to the frame (1), thereby causing the first pin hole of the gear (100) to remain aligned with the second pin hole of the valve stem (200).

2. The assembly tool according to claim 1, characterized in that: The second anti-rotation component (3) comprises a receiving groove (31) fixed relative to the frame (1) and capable of receiving the gear body (101) of the gear (100), and a tooth group (32) provided on the groove wall of the receiving groove (31) and arranged circumferentially, wherein the tooth group (32) meshes with the gear body (101) of the gear (100).

3. The assembly tool according to claim 2, characterized in that: The tooth group (32) comprises a first sub-tooth group (321) and a second sub-tooth group (322) which are arranged in the accommodating groove (31) at intervals, and the first sub-tooth group (321) and the second sub-tooth group (322) can simultaneously mesh with the gear body (101) of the gear (100), and prevent the gear (100) from generating circumferential rotation while preventing the gear (100) from generating radial movement and disengaging from the accommodating groove (31).

4. The assembly tool according to claim 2, characterized in that: The assembly tool further comprises an axial limiting component (4), which is arranged on the frame (1); the axial limiting component (4) is capable of limiting the position of the gear (100) so as to restrict the gear (100) from moving along its own axial direction.

5. The assembly tool according to claim 4, characterized in that: The axial limit assembly (4) comprises an axial limit member (41) arranged on a side of the gear (100) away from the valve stem (200); one end of the axial limit member (41) is hinged to the frame body (1), and the other end is locked to the frame body (1); in the locked state, the axial limit member (41) prevents the gear (100) from moving in a direction away from the valve stem (200).

6. The assembly tool according to claim 4, characterized in that: The frame body (1) includes a supporting portion (11) for supporting the shaft sleeve portion (102) of the gear (100), and the axial limiting assembly (4) also includes a clamping member (42) arranged on the side of the gear (100) close to the valve stem (200), and the clamping member (42) passes through the supporting portion (11) of the frame body (1) and is connected thereto via a threaded structure, and the clamping member (42) is used to abut against the gear body (101) of the gear (100) to limit the gear (100) from moving in a direction close to the valve stem (200).

7. The assembly tool according to claim 1, characterized in that: The first anti-rotation component (2) comprises an anti-rotation member (21) having one end hinged to the frame (1) and the other end locked to the frame (1); the anti-rotation member (21) can position the valve stem (200) in a locked state.

8. The assembly tool according to claim 7, characterized in that: The anti-rotation member (21) is provided with a first plane portion, which can make surface contact with a second plane portion provided on the valve stem (200) so as to prevent the valve stem (200) from moving along its own axial direction while positioning the valve stem (200).

9. The assembly tool according to claim 1, characterized in that: The frame (1) includes a supporting portion (11), the supporting portion (11) being provided with a positioning groove (111) for supporting the shaft sleeve portion (102) of the gear (100), and the supporting portion (11) being further provided with a disassembly hole (112) connected to the bottom of the positioning groove (111), the disassembly hole (112) being used to completely receive the pin (300) withdrawn from the gear (100) and the valve stem (200).

10. A press-fitting device, characterized in that: It comprises a press and an assembly tool as described in any one of claims 1 to 9, wherein the assembly tool is arranged in the press-fitting area of ​​the press and is used to position the gear (100) and the valve stem (200) which are sleeved with each other, and the press installs the pin (300) into the two.

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