Handle nut automatic screwing mechanism

Abstract

The utility model discloses an automatic screwing mechanism for a handle nut, which relates to an assembling mechanism capable of automatically screwing the handle nut, and structurally comprises a workbench, a plurality of positioning clamps arranged on the workbench, and a nut track connected with a vibration disc and used for sequentially inputting the handle nut, a plurality of groups of valve bodies and handles which are positioned and clamped are arranged in each positioning clamp, and each group of handles is assembled at the top of the valve body; meanwhile, an automatic screwdriver capable of moving in multiple directions is further arranged above the multiple positioning clamps; in this way, the automatic screwdriver moves in multiple directions to clamp the handle nuts on the nut track and is aligned with the assembling positions of all sets of handles, and then automatic screwing can be conducted; obviously, the trouble of manually screwing the handle nut is omitted through the automatic screwing mechanism, and compared with a manual assembling mode, the automatic screwing mechanism has the advantages of being high in assembling efficiency, reliable in assembling quality and the like.

Description

Technical Field

[0001] The utility model relates to an automatic tightening mechanism, in particular to an automatic tightening mechanism for a handle nut. Background Art

[0002] At present, many valves need to be opened and closed by handles. For example, the handles in the ball valve structure are assembled on the valve stem at the top of the valve body through the front end of the handle, and then tightened and fixed by the valve stem nut. The ball valve can be opened and closed by operating the rear end of the suspended handle to drive the valve stem to rotate forward and backward. Among them, the handle nut is mostly assembled and tightened manually, that is, the handle of the ball valve is installed after the pressure test, and the worker needs to hold a pneumatic screwdriver to manually tighten the handle nut to the assembly position of the handle. This assembly method often has defects such as low assembly efficiency and difficulty in ensuring assembly quality when facing mass production, so it is difficult to meet the current automated production model of products. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a handle nut automatic tightening mechanism which can improve assembly efficiency and ensure assembly quality reliability.

[0004] The technical problem of the utility model is achieved through the following technical solutions:

[0005] A handle nut automatic tightening mechanism includes a workbench, on which are provided a plurality of positioning fixtures and nut tracks that connect to a vibration plate and sequentially input the handle nuts. Each positioning fixture is provided with a plurality of groups of valve bodies and handles for positioning and clamping, and each group of handles is assembled on the top of the valve body. A multi-directionally movable automatic screwdriver is provided above the plurality of positioning fixtures. The automatic screwdriver clamps the handle nuts on the nut tracks through multi-directional movement and automatically tightens them in accordance with the assembly position of each group of handles.

[0006] The positioning fixture includes a base plate and a valve body positioning seat arranged on the base plate, a movable clamping plate is provided on the front side of the valve body positioning seat, and a handle positioning plate is provided on the rear side of the valve body positioning seat; the valve body is positioned and placed in the valve body positioning seat, and cooperates with the movable clamping plate to form clamping or loosening; the front end of the handle is assembled on the top of the valve body, and the rear end of the handle is positioned and assembled on the handle positioning plate.

[0007] The valve body positioning seat is provided with a plurality of positioning stations, each positioning station is provided with a valve body for positioning, and correspondingly, a plurality of positioning grooves are provided on the top of the handle positioning plate, and the plurality of positioning grooves correspond one to one with the plurality of positioning stations.

[0008] The valve bodies are positioned and placed in the plurality of positioning stations, and cooperate with the movable clamping plates to form synchronous clamping or synchronous release.

[0009] The bottom plate is provided with a driving cylinder, and the movable clamping plate is driven by the driving cylinder to approach the clamping valve body or to separate from and release the valve body.

[0010] The front side of the movable clamping plate is provided with a clamping groove for clamping the valve body.

[0011] The valve body positioning seat is provided with guide grooves which are respectively matched with two sides of the movable clamping plate and form guide grooves for the movable clamping plate to move.

[0012] The workbench is provided with a plurality of Y-direction tracks, each of which is provided with a positioning fixture, and the positioning fixture moves back and forth along the Y direction.

[0013] The workbench is provided with a track frame, the top of the track frame is provided with an X-axis motor that moves horizontally back and forth along the X direction, the X-axis motor is provided with a Z-axis motor that moves up and down and back and forth along the Z direction, and the bottom of the Z-axis motor is provided with an automatic screwdriver, and the automatic screwdriver is driven by the combination of the X-axis motor and the Z-axis motor to form multi-directional movement.

[0014] The plurality of positioning fixtures are installed on the workbench at intervals in sequence along the X direction, and the plurality of groups of positioning and clamping valve bodies and handles are arranged in each positioning fixture at intervals in sequence along the X direction.

[0015] Compared with the prior art, the utility model provides an assembly mechanism that can automatically tighten the handle nut. It mainly comprises a plurality of positioning fixtures and a nut track that connects the vibration plate and sequentially inputs the handle nut on the workbench. Each positioning fixture is provided with a plurality of groups of valve bodies and handles for positioning and clamping, and the handles of each group are assembled on the top of the valve body. At the same time, a multi-directionally movable automatic screwdriver is also provided above the plurality of positioning fixtures. In this way, the automatic screwdriver clamps the handle nut on the nut track through multi-directional movement, and automatically tightens it by aligning it with the assembly position of each group of handles. Obviously, this automatic tightening mechanism eliminates the trouble of manually tightening the handle nut, and has the advantages of high assembly efficiency and reliable assembly quality compared with the manual assembly method. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the present utility model.

[0017] Figure 2 Schematic diagram of the positioning fixture (clamping state).

[0018] Figure 3 This is a structural diagram of the positioning fixture (released state). DETAILED DESCRIPTION

[0019] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0020] like Figures 1 to 3 As shown, 1. workbench, 2. positioning fixture, 21. base plate, 22. valve body positioning seat, 221. positioning station, 222. guide groove, 23. handle positioning plate, 231. positioning groove, 24. movable splint, 241. clamping groove, 25. driving cylinder, 251. cylinder seat, 3. nut track, 4. automatic screwdriver, 5. track frame, 6. X-axis motor, 7. Z-axis motor, 8. Y-axis track, 91. valve body, 92. handle, 93. handle nut.

[0021] A handle nut automatic tightening mechanism is mainly used for automatically tightening the handle nut 93. In this embodiment, a ball valve is selected as a reference valve, but the automatic tightening mechanism can also be applied to automatically tighten the handle nuts of other valves.

[0022] The handle nut automatic tightening mechanism includes a workbench 1, and a plurality of positioning fixtures 2 arranged on the workbench and a nut track 3 that connects the vibration plate and sequentially inputs the handle nut 93. Figure 1 As shown, two positioning fixtures 2 are arranged on the workbench 1, and the two positioning fixtures are arranged at a distance along the X direction.

[0023] At the same time, a plurality of Y-direction rails 8 are provided on the workbench 1, and specifically, a positioning fixture 2 is provided on each Y-direction rail. Figure 1 As shown, two Y-direction rails 8 need to be provided, and the positioning fixture 2 can move back and forth along the Y-direction rails 8.

[0024] The structures of the two positioning fixtures 2 are exactly the same. Each positioning fixture includes a square base plate 21 and a valve body positioning seat 22 arranged on the base plate. The front side of the valve body positioning seat is provided with a movable clamping plate 24, and the rear side of the valve body positioning seat 22 is provided with a handle positioning plate 23.

[0025] Among them, the valve body positioning seat 22 is provided with a plurality of positioning stations 221, each positioning station is provided with a valve body 91 for positioning and placement, and a plurality of positioning grooves 231 are provided on the top of the handle positioning plate 23. The plurality of positioning grooves correspond to the plurality of positioning stations 221 one by one. Figure 2 、 Figure 3 As shown, three one-to-one corresponding positioning positions 221 and positioning grooves 231 are provided, and the front end of the handle 92 is assembled on the top of the valve body 91 , and the rear end of the handle is positioned and fitted in the positioning groove 231 of the handle positioning plate 23 .

[0026] The movable splint 24 is driven by the driving cylinder 25 to move back and forth. The driving cylinder 25 is fixed to the base plate 21 through the cylinder seat 251. The movable splint 24 is driven by the driving cylinder 25 to approach the clamping valve body 91 or detach from the valve body 91 to release it. In this embodiment, three valve bodies 91 are positioned and placed in the three positioning stations 221 of each positioning fixture 2, so the three valve bodies 91 will be clamped or released synchronously by cooperating with the movable splint 24.

[0027] That is to say, each positioning fixture 2 is provided with three sets of positioning and clamping valve bodies 91 and handles 92, and each set of handles 92 is just assembled on the top of the valve body 91, and the three sets of positioning and clamping valve bodies 91 and handles 92 are also just arranged in each positioning fixture 2 at intervals along the X direction.

[0028] Moreover, the valve body positioning seat 22 is provided with guide grooves 222 respectively matched with the two sides of the movable clamping plate 2. Figure 2 、 Figure 3 As shown, the guide grooves 222 are designed on the inner side surfaces of the top of the side plates on both sides of the valve body positioning seat 22, and the front end of the guide groove 222 passes through the front part of the side plate for the movable splint 2 to be installed, and the rear end of the guide groove 222 extends backward to the rear part of the side plate and is closed to serve as a stroke limit. Therefore, the movable splint 2 driven by the driving cylinder 25 can form a moving guide through the guide grooves 222 on both sides, thereby ensuring the accuracy of the clamping position of the movable splint 2.

[0029] In addition, the workbench 1 is provided with a "door"-shaped track frame 5, the top of the track frame is provided with an X-axis motor 6 that moves horizontally back and forth along the X direction, and the X-axis motor is provided with a Z-axis motor 7 that moves up and down and back and forth along the Z direction. The bottom of the Z-axis motor is provided with an automatic screwdriver 4, so the automatic screwdriver can form multi-directional movement by being driven by the combination of the X-axis motor 6 and the Z-axis motor 7; the X-axis motor 6 and the Z-axis motor 7 are both servo motors to improve the movement accuracy.

[0030] In this way, the automatic screwdriver 4 clamps the handle nut 93 on the nut track 3 through multi-directional movement, and aligns it with the assembly position of each set of handles 92 to automatically tighten it; of course, the valve body 91 after pressure testing and the handle 92 to be installed still need to be placed in the positioning fixture 2 with the manual assistance of workers before the handle nut 93 can be automatically tightened later.

[0031] Obviously, the trouble of manually tightening the handle nut is omitted by this automatic tightening mechanism, and compared with the manual assembly method, it also has the advantages of high assembly efficiency and reliable assembly quality.

[0032] The above describes the basic principles and main features of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the claimed invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A handle nut automatic tightening mechanism, comprising a workbench (1), characterized in that The workbench (1) is provided with a plurality of positioning fixtures (2) and nut tracks (3) that connect to the vibration plate and sequentially input the handle nuts (93). Each positioning fixture (2) is provided with a plurality of groups of positioning and clamping valve bodies (91) and handles (92), and each group of handles is assembled on the top of the valve body (91); a multi-directionally movable automatic screwdriver (4) is provided above the plurality of positioning fixtures (2). The automatic screwdriver clamps the handle nuts (93) on the nut tracks (3) through multi-directional movement and automatically tightens them in alignment with the assembly position of each group of handles (92).

2. The automatic tightening mechanism for a handle nut according to claim 1, characterized in that The positioning fixture (2) includes a base plate (21) and a valve body positioning seat (22) arranged on the base plate, a movable clamping plate (24) is provided on the front side of the valve body positioning seat, and a handle positioning plate (23) is provided on the rear side of the valve body positioning seat; the valve body (91) is positioned and placed in the valve body positioning seat (22) and cooperates with the movable clamping plate (24) to form a clamping or loosening; the front end of the handle is assembled on the top of the valve body (91), and the rear end of the handle is positioned and assembled on the handle positioning plate (23).

3. The automatic tightening mechanism for a handle nut according to claim 2, characterized in that The valve body positioning seat (22) is provided with a plurality of positioning stations (221), each positioning station is provided with a valve body (91) for positioning and placement, and a plurality of positioning grooves (231) are correspondingly provided on the top of the handle positioning plate (23), and the plurality of positioning grooves correspond one-to-one to the plurality of positioning stations (221).

4. The automatic tightening mechanism for a handle nut according to claim 3, characterized in that The valve bodies (91) are positioned and placed in the plurality of positioning stations (221) and cooperate with the movable clamping plates (24) to form synchronous clamping or synchronous loosening.

5. The handle nut automatic tightening mechanism according to claim 2, characterized in that A driving cylinder (25) is provided on the bottom plate (21), and the movable clamping plate (24) is driven by the driving cylinder (25) to approach the clamping valve body (91) or to separate from and release the valve body (91).

6. The handle nut automatic tightening mechanism according to claim 2, characterized in that The front side of the movable clamping plate (24) is provided with a clamping groove (241) that matches the clamping valve body (91).

7. The handle nut automatic tightening mechanism according to claim 5, characterized in that The valve body positioning seat (22) is provided with guide grooves (222) respectively fitted with two sides of the movable clamping plate (24) and forming guide grooves for the movable clamping plate (24) to move.

8. The handle nut automatic tightening mechanism according to claim 1, characterized in that The workbench (1) is provided with a plurality of Y-direction rails (8), each of which is provided with a positioning fixture (2), and the positioning fixture moves back and forth along the Y direction.

9. The automatic tightening mechanism for a handle nut according to claim 1, characterized in that The workbench (1) is provided with a track frame (5), the top of the track frame is provided with an X-axis motor (6) that moves horizontally and reciprocatingly in the X direction, the X-axis motor is provided with a Z-axis motor (7) that moves up and down and reciprocatingly in the Z direction, and the bottom of the Z-axis motor is provided with an automatic screwdriver (4), and the automatic screwdriver is driven by the combination of the X-axis motor (6) and the Z-axis motor (7) to form multi-directional movement.

10. The handle nut automatic tightening mechanism according to claim 1, characterized in that The plurality of positioning fixtures (2) are installed on the workbench (1) at intervals in the X direction, and the plurality of groups of positioning and clamping valve bodies (91) and handles (92) are arranged in each positioning fixture (2) at intervals in the X direction.

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