Positioning clamp for valve rod machining

Abstract

The utility model discloses a locating clamp for valve rod machining, and relates to the technical field of valve rod machining, the locating clamp comprises a locating clamp body which is suitable for being used for valve rod machining and locating, the locating clamp body comprises a machining table, supporting legs are fixedly installed on the two sides of the bottom end of the machining table, an adjusting unit is arranged on the top of the machining table, and the adjusting unit is connected with the locating clamp body. The adjusting unit comprises a limiting groove formed in the top of the machining table, a fixed clamping assembly is fixedly installed at the end, located on the left side of the limiting groove, of the top of the machining table, and a movable clamping assembly is slidably installed at the position, located in the limiting groove, of the top of the machining table. The rotating rod is arranged to drive the rotating disc to promote the threaded rod to rotate at a constant speed, so that the movable block on the outer surface of the threaded rod moves in the limiting groove, the movable clamping assembly is driven to gradually get close to the fixed clamping assembly, and the clamping distance between the fixed clamping assembly and the movable clamping assembly can be changed according to the length of the valve rod; and the use convenience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of valve stem processing, in particular to a positioning fixture for valve stem processing. Background Art

[0002] The valve stem is an important part of the valve, used for transmission, connected to the actuator or handle on the top, and directly drives the valve core to move or rotate below to achieve the valve opening or closing or regulation. The valve stem needs to be positioned and clamped during the processing to improve the processing accuracy and reduce the defective rate. For this reason, we provide a positioning fixture for valve stem processing.

[0003] During the processing of the existing valve stem, a clamp is used to clamp and position it to ensure stable processing and improve accuracy. However, the current clamp is inconvenient to adjust according to the length of the valve stem, which makes it inconvenient to use and reduces work efficiency. Utility Model Content

[0004] The utility model aims to provide a positioning fixture for valve stem processing to solve the problems raised in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A positioning fixture for valve stem processing comprises a positioning fixture body, which is suitable for valve stem processing and positioning. The positioning fixture body comprises a processing table, and support legs are fixedly installed on both sides of the bottom end of the processing table.

[0007] An adjusting unit is arranged on the top of the processing table.

[0008] A further improvement of the technical solution of the utility model is that: the adjustment unit includes a limiting groove opened on the top of the processing table, a fixed clamping component is fixedly installed on the left end of the limiting groove on the top of the processing table, a movable clamping component is slidably installed inside the limiting groove on the top of the processing table, and a rotating rod is provided on the right outer surface of the processing table, which can drive the threaded rod to rotate.

[0009] A further improvement of the technical solution of the utility model is that: a turntable is fixedly mounted on the other end of the rotating rod, a threaded rod is fixedly mounted on the other end of the rotating disk, the other end of the threaded rod is rotatably mounted on the left inner wall of the limiting groove, a moving block is movably sleeved on the outer surface of the threaded rod, the moving block is slidably mounted inside the limiting groove, the top of the moving block is fixedly mounted on the bottom end of the moving clamping assembly, and the rotation of the threaded rod enables the moving clamping assembly to move left and right.

[0010] A further improvement of the technical solution of the utility model is that the fixed clamping assembly and the movable clamping assembly both include a lower clamping block, fixed vertical rods are fixedly installed on both sides of the top of the lower clamping block, an upper clamping block is slidably sleeved on the outer surface of the fixed vertical rod, and the fixed vertical rod can limit the movement of the upper clamping block.

[0011] A further improvement of the technical solution of the utility model is that a top plate is fixedly installed on the top of the fixed vertical rod, the outer surface of the fixed vertical rod is located above the upper clamping block and is movably sleeved with a return spring, and a pulling rod is movably inserted into the middle position of the top plate, and the pulling rod can move the clamping block upward.

[0012] A further improvement of the technical solution of the utility model is that the bottom end of the pull rod is fixedly mounted on the top outer surface of the upper clamping block, and rubber protrusions are fixedly mounted on the inner surfaces of the upper clamping block and the lower clamping block, and the rubber protrusions can enhance the friction between the clamping block and the valve stem.

[0013] A further improvement of the technical solution of the utility model is that a semicircular fixing block is fixedly installed on the bottom end of the right outer surface of the upper clamping block, a connecting ring is fixedly installed on the top end of the right outer surface of the lower clamping block, a fixing ring is rotatably connected to the outer surface of the connecting ring, and the fixing ring is sleeved on the outer surface of the semicircular fixing block, which can make the upper clamping block and the lower clamping block fit tightly and promote stable clamping.

[0014] Due to the adoption of the above technical solution, the utility model has achieved the following technical progress compared with the prior art:

[0015] 1. The utility model provides a positioning fixture for valve stem processing. A rotating rod is arranged to drive a rotating disk to cause a threaded rod to rotate at a uniform speed, so that a moving block on its outer surface moves inside a limiting groove, driving a moving clamping assembly to gradually approach a fixed clamping assembly. The clamping distance between the fixed clamping assembly and the moving clamping assembly can be changed according to the length of the valve stem, thereby improving the effect of convenience in use.

[0016] 2. The utility model provides a positioning fixture for valve stem processing. By setting an upper clamping block and a lower clamping block, a reset spring is set to cause the upper clamping block to rebound and reset under its counter-thrust force, tightly fitting on the top of the lower clamping block to clamp and position the valve stem. The rubber protrusion can enhance the clamping friction and thus promote the clamping stability effect.

[0017] 3. The utility model provides a positioning fixture for valve stem processing, which is sleeved on the outer surface of the semicircular fixing block by rotating the fixing ring, so that the upper clamping block and the lower clamping block are closely fitted. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the processing table structure of the utility model;

[0020] Figure 3 It is a schematic diagram of the structure of the fixed clamping assembly and the movable clamping assembly of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the mobile clamping assembly of the utility model;

[0022] Figure 5 For the utility model Figure 4 A is an enlarged schematic diagram of the structure.

[0023] In the figure: 1. Positioning fixture body; 2. Processing table; 21. Limiting groove; 22. Fixed clamping assembly; 23. Mobile clamping assembly; 231. Lower clamping block; 232. Fixed vertical rod; 233. Upper clamping block; 234. Top plate; 235. Return spring; 236. Pull rod; 237. Rubber bump; 238. Semicircular fixed block; 239. Connecting ring; 2310. Fixed ring; 24. Rotating rod; 25. Turntable; 26. Threaded rod; 27. Moving block; 3. Support leg. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Example 1

[0026] like Figure 1-5As shown, the utility model provides a positioning fixture for valve stem processing, including a positioning fixture body 1, which is suitable for valve stem processing and positioning. The positioning fixture body 1 includes a processing table 2, and support legs 3 are fixedly installed on both sides of the bottom end of the processing table 2. An adjusting unit is arranged on the top of the processing table 2, and the adjusting unit includes a limiting groove 21 opened on the top of the processing table 2, and a fixed clamping assembly 22 is fixedly installed on the left end of the limiting groove 21 at the top of the processing table 2, and a movable clamping assembly 23 is slidably installed inside the limiting groove 21 at the top of the processing table 2. A rotating rod 24 is arranged on the right outer surface of the processing table 2, and a rotating disk 25 is fixedly installed on the other end of the rotating rod 24, and a threaded rod 26 is fixedly installed on the other end of the rotating disk 25, and the other end of the threaded rod 26 is rotatably installed on the left inner wall of the limiting groove 21, and a moving block 27 is movably sleeved on the outer surface of the threaded rod 26, and the moving block 27 is slidably installed inside the limiting groove 21, and the top of the moving block 27 is fixedly installed on the bottom end of the moving clamping assembly 23.

[0027] Furthermore, by rotating the rotating rod 24, the rotating rod 24 drives the rotating disk 25 to cause the threaded rod 26 to rotate at a uniform speed, thereby causing the moving block 27 on its outer surface to move inside the limiting groove 21, driving the mobile clamping assembly 23 to gradually approach the fixed clamping assembly 22, and the clamping distance between the fixed clamping assembly 22 and the mobile clamping assembly 23 can be changed according to the length of the valve stem.

[0028] Example 2

[0029] like Figure 1-5 As shown, on the basis of Example 1, the utility model provides a technical solution: preferably, the fixed clamping assembly 22 and the movable clamping assembly 23 both include a lower clamping block 231, fixed vertical rods 232 are fixedly installed on both sides of the top of the lower clamping block 231, an upper clamping block 233 is slidably sleeved on the outer surface of the fixed vertical rod 232, a top plate 234 is fixedly installed on the top of the fixed vertical rod 232, the outer surface of the fixed vertical rod 232 is located above the upper clamping block 233 and is movably sleeved with a return spring 235, a pull rod 236 is movably inserted in the inner middle position of the top plate 234, the bottom end of the pull rod 236 is fixedly installed on the top outer surface of the upper clamping block 233, and rubber protrusions 237 are fixedly installed on the inner surfaces of the upper clamping block 233 and the lower clamping block 231.

[0030] Furthermore, the pulling rod 236 is pulled upward to cause the upper clamping block 233 to slide on the outer surface of the fixed vertical rod 232, thereby squeezing the reset spring 235. At this time, one end of the valve stem is placed inside the upper clamping block 233 and the lower clamping block 231, and then the pulling rod 236 is released. The upper clamping block 233 rebounds and resets under the counter-thrust force of the reset spring 235, and fits tightly on the top of the lower clamping block 231, clamping and positioning the valve stem. The rubber protrusion 237 can enhance the clamping friction and promote clamping stability.

[0031] Example 3

[0032] like Figure 1-5 As shown, based on Examples 1-2, the utility model provides a technical solution: preferably, a semicircular fixing block 238 is fixedly installed on the bottom end of the right outer surface of the upper clamping block 233, a connecting ring 239 is fixedly installed on the top end of the right outer surface of the lower clamping block 231, and a fixing ring 2310 is rotatably connected to the outer surface of the connecting ring 239.

[0033] Furthermore, the rotating fixing ring 2310 is sleeved on the outer surface of the semicircular fixing block 238 so that the upper clamping block 233 and the lower clamping block 231 are tightly fitted.

[0034] The following is a detailed description of the working principle of the positioning fixture for valve stem processing.

[0035] like Figure 1-5 As shown, when in use, the valve stem to be processed is placed above the processing table 2, and the pulling rod 236 is pulled upward to cause the upper clamping block 233 to slide on the outer surface of the fixed vertical rod 232, thereby squeezing the reset spring 235. At this time, one end of the valve stem is placed inside the upper clamping block 233 and the lower clamping block 231, and then the pulling rod 236 is released. The upper clamping block 233 rebounds and resets under the counter-thrusting force of the reset spring 235, and fits tightly on the top of the lower clamping block 231 to clamp and position the valve stem. The rubber protrusion 237 can enhance the clamping friction. The force is increased to promote the clamping stability. At the same time, the rotating fixed ring 2310 is sleeved on the outer surface of the semicircular fixed block 238, so that the upper clamping block 233 and the lower clamping block 231 are tightly fitted. Then, by rotating the rotating rod 24, the rotating rod 24 drives the rotating disk 25 to cause the threaded rod 26 to rotate at a uniform speed, thereby causing the moving block 27 on its outer surface to move inside the limiting groove 21, driving the mobile clamping assembly 23 to gradually approach the fixed clamping assembly 22, and the clamping distance between the fixed clamping assembly 22 and the mobile clamping assembly 23 can be changed according to the length of the valve stem.

[0036] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not deviate from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A positioning fixture for valve stem processing, comprising a positioning fixture body (1), suitable for use in valve stem processing and positioning, characterized in that: The positioning fixture body (1) comprises a processing table (2), and support legs (3) are fixedly mounted on both sides of the bottom end of the processing table (2); An adjustment unit is provided on the top of the processing table (2); The adjustment unit comprises a limiting groove (21) formed on the top of the processing table (2); a fixed clamping assembly (22) is fixedly installed on the left end of the limiting groove (21) at the top of the processing table (2); and a movable clamping assembly (23) is slidably installed inside the limiting groove (21) at the top of the processing table (2); The fixed clamping assembly (22) and the movable clamping assembly (23) both comprise a lower clamping block (231), fixed vertical rods (232) are fixedly mounted on both sides of the top of the lower clamping block (231), and an upper clamping block (233) is slidably sleeved on the outer surface of the fixed vertical rod (232); A top plate (234) is fixedly mounted on the top of the fixed vertical rod (232); a return spring (235) is movably sleeved on the outer surface of the fixed vertical rod (232) above the upper clamping block (233); and a pulling rod (236) is movably inserted in the middle position of the top plate (234); The bottom end of the pulling rod (236) is fixedly mounted on the top outer surface of the upper clamping block (233), and rubber protrusions (237) are fixedly mounted on the inner surfaces of the upper clamping block (233) and the lower clamping block (231); A semicircular fixing block (238) is fixedly mounted on the bottom end of the right outer surface of the upper clamping block (233), a connecting ring (239) is fixedly mounted on the top end of the right outer surface of the lower clamping block (231), and a fixing ring (2310) is rotatably connected to the outer surface of the connecting ring (239).

2. A positioning fixture for valve stem processing according to claim 1, characterized in that: A rotating rod (24) is provided on the right outer surface of the processing table (2), a rotating disk (25) is fixedly mounted on the other end of the rotating rod (24), a threaded rod (26) is fixedly mounted on the other end of the rotating disk (25), the other end of the threaded rod (26) is rotatably mounted on the left inner wall of the limiting groove (21), a moving block (27) is movably sleeved on the outer surface of the threaded rod (26), the moving block (27) is slidably mounted inside the limiting groove (21), and the top of the moving block (27) is fixedly mounted on the bottom end of the moving clamping assembly (23).

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