A valve cover and stem assembly aid

Abstract

This application relates to the field of valve technology, and in particular to an auxiliary device for assembling a valve cover and valve stem. The device includes a worktable, a motor body mounted on the worktable, and a screwing shaft coaxially connected to the output shaft of the motor body. The screwing shaft and the output shaft of the motor body are circumferentially linked. A screwing groove is coaxially formed on the end face of the screwing shaft away from the output shaft of the motor body. A screwing protrusion at one end of the valve stem is inserted into the screwing groove. The worker manually inserts the valve stem into the assembly hole of the valve cover, and then, holding the valve cover, inserts the screwing protrusion of the valve stem into the screwing groove. The output shaft of the motor body rotates, causing the screwing shaft to rotate coaxially, thereby achieving screwing that rotates the valve stem around its own axis. During screwing, the worker holds the valve cover and pushes it forward. After the valve stem is screwed, the valve cover is pulled back as a whole, allowing the screwing protrusion of the valve stem to disengage from the screwing groove. The assembly process is simple and convenient, improving the assembly efficiency of the valve stem.

Description

Technical Field

[0001] This application relates to the field of valve technology, and in particular to an auxiliary device for assembling a valve cover and valve stem. Background Technology

[0002] In the valve manufacturing process, the valve cover, valve stem, and valve seat are usually processed and formed independently, and then assembled to form a complete valve structure. For some small valves, the valve cover and valve stem are mainly connected by threads.

[0003] In the current processing, since valve stems and valve covers are mass-produced, subsequent assembly mainly relies on manual screwing to attach the valve stem to the valve cover, resulting in low overall assembly efficiency. Therefore, further improvements are needed. Utility Model Content

[0004] To improve the assembly efficiency of valve stems, this application provides an auxiliary device for assembling valve covers and valve stems.

[0005] The auxiliary device for assembling a valve cover and valve stem provided in this application adopts the following technical solution: An auxiliary device for assembling a valve cover and a valve stem includes a worktable, a motor body disposed on the worktable, and a screwing shaft coaxially connected to the output shaft of the motor body. The screwing shaft and the output shaft of the motor body are circumferentially linked. A screwing groove is coaxially formed on the end face of the screwing shaft away from the output shaft of the motor body, and a screwing protrusion at one end of the valve stem is inserted into the screwing groove.

[0006] By adopting the above technical solution, the worker manually inserts the valve stem into the assembly hole of the valve cover. The worker holds the valve cover and inserts the screwing protrusion of the valve stem into the screwing groove. The output shaft of the motor body rotates, driving the screwing shaft to rotate coaxially, thereby realizing the screwing of the valve stem around its own axis. During the screwing process, the worker holds the valve cover and pushes it forward. After the valve stem is screwed, the valve cover is pulled back as a whole, so that the screwing protrusion of the valve stem is disengaged from the screwing groove. The assembly process is simple and convenient, improving the assembly efficiency of the valve stem.

[0007] Preferably, the screwing shaft and the motor body output shaft are fixedly connected by a coupling.

[0008] By adopting the above technical solution, the circumferential linkage between the screwing shaft and the output shaft of the motor body is achieved through a coupling.

[0009] Preferably, a first flange is coaxially fixedly connected to the end face of the output shaft of the motor body, and a second flange is coaxially fixedly connected to the end face of the screwing shaft, with the first flange and the second flange connected by bolts.

[0010] By adopting the above technical solution, the first flange and the second flange are connected by bolts, which enables reliable circumferential linkage between the screwing shaft and the output shaft of the motor body.

[0011] Preferably, a protective sleeve is installed on the output end face of the motor body, and the protective sleeve and the output shaft of the motor body are coaxially arranged. The protective sleeve is sleeved on the output shaft and the screwing shaft of the motor body.

[0012] By adopting the above technical solution, the protective sleeve is fitted onto the output shaft and the turning shaft of the motor body, reducing the exposure of the output shaft and the turning shaft, thereby reducing the possibility of workers accidentally touching the output shaft and the turning shaft and improving operational safety.

[0013] Preferably, the outer end face of the protective sleeve is flush with the outer end face of the screwing shaft.

[0014] By adopting the above technical solution, it is convenient for workers to insert the screwing protrusion of the valve stem into the screwing groove.

[0015] Preferably, the housing of the motor body is fixedly connected to a mounting block, and multiple mounting blocks are provided and distributed around the axis of the output shaft of the motor body. One end of the protective sleeve has a protruding ear plate fixedly attached to it, and the ear plate and the mounting block are connected by bolts.

[0016] By adopting the above technical solution, using mounting blocks, ear plates and bolts, the protective sleeve can be securely installed on the motor body, thereby protecting the output shaft and the turning shaft of the motor body.

[0017] Preferably, the protective sleeve includes a fixed sleeve and a movable sleeve. The fixed sleeve is fixedly connected to the housing of the motor body, and the movable sleeve is coaxially slidably inserted into the fixed sleeve. The fixed sleeve is provided with a limiting member to restrict the sliding of the movable sleeve.

[0018] By adopting the above technical solution, the protective sleeve includes a fixed sleeve and a movable sleeve that can slide relative to each other, and a limiting component is set to restrict the sliding of the movable sleeve. The length of the protective sleeve can be adjusted according to actual needs, thereby improving the flexibility and applicability of protection.

[0019] Preferably, the limiting component is a limiting screw, which is threaded through the fixed cylinder, and one end of the limiting screw is pressed against the outer wall of the movable cylinder.

[0020] By adopting the above technical solution, the limiting screw thread passes through the fixed cylinder and one end abuts against the outer wall of the movable cylinder, which can limit the sliding of the movable cylinder and facilitate the adjustment of the length of the protective sleeve according to actual needs.

[0021] In summary, this utility model has the following beneficial effects: 1. The worker manually inserts the valve stem into the assembly hole of the valve cover. The worker holds the valve cover and inserts the screwing protrusion of the valve stem into the screwing groove. The output shaft of the motor body rotates, driving the screwing shaft to rotate coaxially, thereby realizing the screwing of the valve stem around its own axis. During the screwing process, the worker holds the valve cover and pushes it forward. After the valve stem is screwed, the valve cover is pulled back as a whole, so that the screwing protrusion of the valve stem is disengaged from the screwing groove. The assembly process is simple and convenient, improving the assembly efficiency of the valve stem. 2. Protective sleeves are fitted onto the motor body output shaft and the screw shaft to reduce the exposure of the motor body output shaft and the screw shaft, thereby reducing the possibility of workers accidentally touching the motor body output shaft and the screw shaft and improving operational safety. 3. The protective sleeve includes a fixed sleeve and a movable sleeve that can slide relative to each other, and is equipped with a limiting component to restrict the sliding of the movable sleeve. The length of the protective sleeve can be adjusted according to actual needs to improve the flexibility and applicability of protection. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of an auxiliary device for assembling a valve cover and valve stem in Embodiment 1; Figure 2 This is a schematic diagram of the connection structure between the screw shaft and the output shaft in Embodiment 1; Figure 3 This is a schematic diagram of the limiting set screw in Example 1; Figure 4 This is a schematic diagram of the connection structure between the screwing shaft and the output shaft in Embodiment 2; Figure 5 This is a schematic diagram of the connection structure between the screwing shaft and the output shaft in Embodiment 3; Figure 6 This is a schematic diagram of the base structure in Example 4.

[0023] In the diagram, 1. Workbench; 2. Base; 3. Motor body; 31. Output shaft; 32. Coupling; 33. Mounting block; 34. First flange; 35. Stop groove; 4. Tightening shaft; 41. Main shaft; 42. Connecting shaft; 43. Tightening groove; 44. Second flange; 45. Second limit ring; 46. Bearing; 5. Protective sleeve; 51. Fixed cylinder; 52. Movable cylinder; 53. Ear plate; 54. Limiting screw; 55. Knob; 56. First limit ring; 57. Positioning ring groove. Detailed Implementation

[0024] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0025] Example 1: This application discloses an auxiliary device for assembling a valve cover and valve stem, referring to... Figure 1It includes a workbench 1, a base 2 fixedly connected to the workbench 1, a motor body 3 fixedly connected to the upper end face of the base 2, and a screwing shaft 4 coaxially connected to the output shaft 31 of the motor body 3. The base plate of the motor body 3 is fixed to the upper end face of the base 2 by bolts.

[0026] Reference Figure 2 The screwing shaft 4 includes a main shaft 41 and a connecting shaft 42 coaxially fixedly connected to one end of the main shaft 41. The connecting shaft 42 and the output shaft 31 of the motor body 3 are circumferentially linked. In this embodiment, the connecting shaft 42 and the output shaft 31 of the motor body 3 are fixedly connected by a coupling 32, which is existing technology and will not be described in detail. A screwing groove 43 is coaxially formed on the end face of the main shaft 41 away from the connecting shaft 42. A screwing protrusion at one end of the valve stem is inserted into the screwing groove 43. The cross-section of the screwing groove 43 is polygonal, and the opening of the screwing groove 43 is flared to facilitate the insertion of the screwing protrusion.

[0027] Reference Figure 2 , Figure 3 A protective sleeve 5 is installed on the output end face of the motor body 3. The protective sleeve 5 and the output shaft 31 of the motor body 3 are coaxially arranged. The protective sleeve 5 is sleeved on the output shaft 31 and the screwing shaft 4 of the motor body 3. Specifically, the protective sleeve 5 includes a fixed sleeve 51 and a movable sleeve 52. The housing of the motor body 3 is fixedly connected to a mounting block 33 by welding. Multiple mounting blocks 33 are provided and distributed around the axis of the output shaft 31 of the motor body 3. An ear plate 53 is fixedly protruding from the outer wall of one end of the fixed sleeve 51. The ear plate 53 and the mounting block 33 are connected by bolts.

[0028] The movable cylinder 52 is coaxially slidably inserted into the fixed cylinder 51, and the outer end face of the movable cylinder 52 is flush with the outer end face of the main shaft 41. The fixed cylinder 51 is provided with a limiting member to restrict the sliding of the movable cylinder 52. In this embodiment, the limiting member is a limiting screw 54, which is threaded through the fixed cylinder 51. One end of the limiting screw 54 is pressed against the outer wall of the movable cylinder 52, and the other end of the limiting screw 54 is coaxially fixedly connected to a knob 55 placed outside the fixed cylinder 51. The position of the movable cylinder 52 can be adjusted by loosening the limiting screw 54.

[0029] The implementation principle of the auxiliary device for assembling a valve cover and valve stem according to an embodiment of this application is as follows: The worker manually inserts the valve stem into the assembly hole of the valve cover, so that the threaded section of the valve stem is aligned with the threaded hole on the valve cover. The worker holds the valve cover and inserts the screwing protrusion of the valve stem into the screwing groove 43. The output shaft 31 of the motor body 3 rotates, driving the screwing shaft 4 to rotate coaxially, thereby realizing the screwing of the valve stem around its own axis. During the screwing process, the worker holds the valve cover and pushes it forward. After the valve stem is screwed, the valve cover is pulled back as a whole, so that the screwing protrusion of the valve stem is disengaged from the screwing groove 43. The assembly process is simple and convenient, improving the assembly efficiency of the valve stem.

[0030] Example 2: The difference from Example 1 is that, referring to Figure 4 The end face of the output shaft 31 of the motor body 3 is coaxially fixedly connected to a first flange 34, and the end face of the connecting shaft 42 is coaxially fixedly connected to a second flange 44. The first flange 34 and the second flange 44 are connected by bolts.

[0031] Example 3: The difference from Example 1 is that, referring to Figure 5 A stop groove 35 is coaxially formed on the end face of the output shaft 31 of the motor body 3. The cross-section of the stop groove 35 is polygonal, and the connecting shaft 42 is fitted into the stop groove 35. A first limiting ring 56 is fixedly connected to the inner wall of the movable cylinder 52. A bearing 46 passes through the main shaft 41, and a second limiting ring 45 is coaxially fixedly connected to the main shaft 41. The end face of the second limiting ring 45 away from the output shaft 31 of the motor body 3 abuts against one end face of the bearing 46, and the first limiting ring 56 abuts against the other end face of the bearing 46. A positioning ring groove 57 is formed around the outer peripheral wall of the movable cylinder 52, and the threaded end of the limiting set screw 54 abuts against the inner wall of the positioning ring groove 57.

[0032] After inserting the connecting shaft 42 into the stop groove 35, the bearing 46 is fitted onto it. The bearing 46 abuts against the end face of the second limiting ring 45. Then, the movable cylinder 52 is inserted into the fixed cylinder 51, so that the first limiting ring 56 abuts against the other end face of the bearing 46. Finally, the limiting screw 54 is locked, so that the threaded end of the limiting screw 54 abuts against the inner wall of the positioning ring groove 57.

[0033] Example 4: The difference from Example 1 is that, referring to Figure 6 The base 2 is a scissor lift platform, and the motor body 3 is fixedly connected to the upper end of the scissor lift platform. The height of the motor body 3 can be adjusted by adjusting the height of the rotating shaft 4 through the scissor lift platform to meet the operating needs of workers of different heights.

[0034] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An auxiliary device for assembling a valve cover and a valve stem, characterized in that: It includes a workbench (1), a motor body (3) set on the workbench (1) and a screwing shaft (4) coaxially connected to the output shaft (31) of the motor body (3). The screwing shaft (4) and the output shaft (31) of the motor body (3) are circumferentially linked. The end face of the screwing shaft (4) away from the output shaft (31) of the motor body (3) is coaxially provided with a screwing groove (43). The screwing protrusion at one end of the valve stem is inserted into the screwing groove (43).

2. The auxiliary device for assembling a valve cover and valve stem according to claim 1, characterized in that: The screwing shaft (4) and the output shaft (31) of the motor body (3) are fixedly connected by a coupling (32).

3. The auxiliary device for assembling a valve cover and valve stem according to claim 1, characterized in that: The end face of the output shaft (31) of the motor body (3) is coaxially fixedly connected to a first flange (34), and the end face of the screwing shaft (4) is coaxially fixedly connected to a second flange (44). The first flange (34) and the second flange (44) are connected by bolts.

4. The auxiliary device for assembling a valve cover and valve stem according to claim 1, characterized in that: A protective sleeve (5) is installed on the output end face of the motor body (3). The protective sleeve (5) and the output shaft (31) of the motor body (3) are coaxially arranged. The protective sleeve (5) is sleeved on the output shaft (31) and the screwing shaft (4) of the motor body (3).

5. The auxiliary device for assembling a valve cover and valve stem according to claim 4, characterized in that: The outer end face of the protective sleeve (5) is flush with the outer end face of the screwing shaft (4).

6. The auxiliary device for assembling a valve cover and valve stem according to claim 4, characterized in that: The motor body (3) has a mounting block (33) fixedly connected to its housing. Multiple mounting blocks (33) are provided and distributed around the axis of the output shaft (31) of the motor body (3). One end of the protective sleeve (5) has a protruding ear plate (53) fixedly attached to its outer wall. The ear plate (53) and the mounting block (33) are connected by bolts.

7. The auxiliary device for assembling a valve cover and valve stem according to claim 4, characterized in that: The protective sleeve (5) includes a fixed sleeve (51) and a movable sleeve (52). The fixed sleeve (51) is fixedly connected to the housing of the motor body (3). The movable sleeve (52) is coaxially slidably inserted into the fixed sleeve (51). The fixed sleeve (51) is provided with a limiting component to restrict the sliding of the movable sleeve (52).

8. The auxiliary device for assembling a valve cover and valve stem according to claim 7, characterized in that: The limiting component is a limiting screw (54), which is threaded through the fixed cylinder (51) and one end of the limiting screw (54) is pressed against the outer wall of the movable cylinder (52).

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