Clamping jaw type positioning tool

Abstract

A clamping jaw type positioning tool comprises a base and further comprises a plurality of limiting assemblies, a supporting plate is fixed to the upper portion of the base, the lower side of the base is sleeved with a limiting ring capable of sliding in the vertical direction, the supporting plate is provided with an outer edge area opposite to the limiting ring, the outer edge area is provided with a plurality of vertical through holes distributed circumferentially at intervals, and the limiting assemblies correspond to the vertical through holes one by one. The limiting assembly comprises limiting blocks, limiting rods and springs, the limiting blocks are located above the supporting plate, clamping jaws protruding towards the center of the supporting plate are arranged on the upper portions of the limiting blocks, the limiting rods are slidably inserted into the corresponding vertical through holes, the upper ends of the limiting rods are connected to the corresponding limiting blocks, and the lower ends of the limiting rods are connected to the limiting rings; the spring is arranged between the supporting plate and the limiting ring and used for applying downward thrust to the limiting ring. According to the scheme, effective positioning of the driving shaft and the main shaft nut is achieved through the clamping jaws of the limiting blocks, the driving shaft and the main shaft nut are convenient to operate during storing and taking due to the springs, and the detection precision and the detection efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tooling fixtures, in particular to a claw-type positioning tooling. Background Art

[0002] The driving shaft and similar driving shafts need to be tested for surface runout after processing. The existing positioning fixture for runout detection generally includes a circular base, and the inner hole of the spindle nut at the bottom of the driving shaft is directly put on the circular fixture. When performing runout detection, the bottom surface is used as the reference and the outer peripheral surface of the driving shaft is used for positioning. By driving the driving shaft and the spindle nut to rotate, the runout value of the outer peripheral surface of the driving shaft can be measured. Considering the convenience of taking and placing the driving shaft, there must be a certain gap between the existing positioning fixture and the inner hole of the spindle nut for easy assembly. However, when the driving shaft is undergoing runout detection, since the driving shaft will rotate, this rotation process will cause the bottom surface reference to change. The gap between the positioning fixture and the inner hole of the spindle nut will affect the detection results, resulting in unstable measurement data. Utility Model Content

[0003] The purpose of the utility model is to solve the problem in the prior art that a certain gap must be provided between the positioning tool and the inner hole of the spindle nut for easy assembly. When the active shaft is subjected to runout detection, the gap between the positioning tool and the inner hole of the spindle nut will affect the detection result, resulting in unstable measurement data.

[0004] The top of described sliding panel also is provided with an interlocking structure, and the interlocking structure is hinged on the base, is fixed with a backing pin on the interlocking structure, and an end of sliding panel withstands on the backing pin of interlocking structure.

[0005] The above scheme increases the limit assembly on the basis of the base, and limits the spindle nut of the driving shaft by the claw of the limit block of the limit assembly. Since the spring applies a downward thrust to the limit ring, the limit rod is driven downward in the natural state, ensuring that the spindle nut of the driving shaft is effectively limited between the claw of the limit block and the support plate, thereby ensuring the accuracy of the measurement data during the subsequent runout detection. When the driving shaft and the spindle nut need to be accessed, since the limit plate can be moved up and down, the limit block can be pulled upward, the spring is compressed, and the distance between the claw and the support plate is increased. At this time, the driving shaft and the spindle nut can be conveniently accessed. Compared with the prior art, the above scheme not only realizes the effective positioning of the driving shaft and the spindle nut by the claw of the limit block, but also makes the driving shaft and the spindle nut easy to operate when accessing due to the presence of the spring, that is, it improves the detection accuracy and assembly efficiency at the same time.

[0006] In an improved solution, a cylindrical positioning piece is provided at the center of the support plate for the spindle nut to be sleeved and positioned.

[0007] In an improved solution, a vertical mounting hole is provided at the center of the support plate, the positioning member is a bolt, the screw end of the positioning member is connected to the mounting hole, and the nut end of the positioning member protrudes from the upper side of the support plate.

[0008] In an improved solution, the limit block is provided with a countersunk hole with a larger aperture at the top and a smaller aperture at the bottom. The upper end of the limit rod is provided with a convex cap and the outer diameter of the convex cap is equal to the aperture of the upper part of the countersunk hole. The upper end of the limit rod passes upward through the lower part of the countersunk hole and allows the convex cap to be slidably inserted into the upper part of the countersunk hole, thereby making assembly simple and convenient.

[0009] In an improved solution, the limiting ring is provided with a plurality of vertical screw holes, which correspond to the limiting rods one by one. The lower end of the limiting rod is provided with a thread, and the lower end of the limiting rod is screwed to the corresponding screw hole, so that the limiting rod can be easily disassembled and assembled relative to the limiting ring.

[0010] In an improved solution, the spring is sleeved on the limiting rod of the same limiting assembly, thereby ensuring that the spring can apply downward thrust to the limiting ring more stably.

[0011] In an improved solution, the number of the vertical through holes and the limiting components are both three and are evenly spaced, so that the claws can abut and limit three of the six vertices of the spindle nut of the driving shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a top view schematic diagram of a claw-type positioning tool;

[0013] Figure 2 For the Figure 1 Schematic cross-sectional view of the AA section line;

[0014] Figure 3 for Figure 2 A partial enlarged schematic diagram of area B in the middle;

[0015] Figure 4 Schematic diagram of the driving shaft and spindle nut.

[0016] Description of reference numerals:

[0017] 1. Base; 2. Support plate; 21. Vertical through hole; 22. Mounting hole; 23. Positioning piece; 3. Limiting ring; 31. Screw hole; 4. Limiting block; 41. Claw; 42. Countersunk hole; 5. Limiting rod; 51. Protruding cap; 6. Spring. DETAILED DESCRIPTION

[0018] It should be understood by those skilled in the art that the following embodiments are merely intended to explain the technical principles of the embodiments of the present application and are not intended to limit the scope of protection of the embodiments of the present application. Those skilled in the art may adjust them as needed to suit specific applications.

[0019] In the following descriptions of the embodiments, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of this application based on the specific circumstances.

[0020] In the embodiments of the present application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0021] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] See also Figures 1-4The embodiment of the present invention provides a claw-type positioning tool, including a base 1, and also includes multiple limit components, the upper part of the base 1 is fixed with a support plate 2 and a limit ring 3 is sleeved on the lower side which can slide vertically, the support plate 2 has an outer edge area opposite to the limit ring 3, the outer edge area is provided with a plurality of vertical through holes 21 distributed at intervals in a circumferential shape, the limit components correspond to the vertical through holes 21 one by one, the limit components include a limit block 4, a limit rod 5 and a spring 6, the limit blocks 4 are all located above the support plate 2 and a limit area for the spindle nut is formed between the plurality of limit blocks 4, and the upper part of the limit block 4 is provided with a claw 41 protruding toward the center of the support plate 2 for abutting against the top of the spindle nut, the limit rod 5 is slidably inserted in the corresponding vertical through hole 21, the upper end of the limit rod 5 is connected to the corresponding limit block 4 and the lower end is connected to the limit ring 3, the spring 6 is arranged between the support plate 2 and the limit ring 3 and is used to apply a downward thrust to the limit ring 3.

[0023] It should be noted that the number of the multiple vertical through holes 21 and the multiple stop assemblies described in this embodiment is at least two. Because the spindle nut of the driving shaft described in this embodiment is hexagonal, the number of vertical through holes 21 and the stop assemblies are both three and evenly spaced, allowing the claws 41 to abut and limit three of the six vertices of the spindle nut of the driving shaft. If the spindle nut of the driving shaft is another polygonal shape, the number of vertical through holes 21 and the stop assemblies can be freely increased or decreased, as long as the claws 41 of at least two stop blocks 4 can abut and limit the vertices of the spindle nut.

[0024] The above scheme increases the limit assembly on the basis of the base 1, and limits the spindle nut of the driving shaft by the claw 41 of the limit block 4 of the limit assembly. At the same time, due to the downward thrust applied by the spring 6 to the limit ring 3, the limit rod 5 is driven downward in the natural state, ensuring that the spindle nut of the driving shaft is effectively restricted between the claw 41 of the limit block 4 and the support plate 2, thereby ensuring the accuracy of the measurement data during the subsequent runout detection. When the driving shaft and the spindle nut need to be accessed, since the limit plate can be moved up and down, the limit block 4 can be pulled upward, the spring 6 is compressed, and the distance between the claw 41 and the support plate 2 is increased, at which time the driving shaft and the spindle nut can be conveniently accessed. Compared with the prior art, the above scheme not only realizes the effective positioning of the driving shaft and the spindle nut by the claw 41 of the limit block 4, but also makes the driving shaft and the spindle nut easy to operate when accessing due to the presence of the spring 6, that is, it improves the detection accuracy and assembly efficiency at the same time.

[0025] In addition, the specific steps for assembling the spindle nut of the driving shaft between the claws 41 of the limit block 4 are: since the spacing between the relative side surfaces of the spindle nut is smaller than the spacing between the relative vertices of the spindle nut, the spindle nut can be placed on the support plate 2 with the side facing the limit block 4. At this time, the spindle nut is between multiple limit blocks 4, and then the spindle nut is rotated with the vertical axis so that the vertex of the spindle nut is in contact with the claws 41 of the limit block 4.

[0026] To ensure the spindle nut's positional stability when positioned between the multiple stoppers 4 and rotating about the vertical axis, this embodiment further provides a cylindrical positioning member 23 at the center of the support plate 2, allowing the spindle nut to be positioned and sleeved. More specifically, a vertical mounting hole 22 is provided in the center of the support plate 2. Positioning member 23 is a bolt, with the screw end of positioning member 23 connected to the mounting hole 22 and the nut end of positioning member 23 protruding from the upper side of the support plate 2.

[0027] In this embodiment, the limit block 4 is provided with a countersunk hole 42 with a larger aperture at the top and a smaller aperture at the bottom. The upper end of the limit rod 5 is provided with a convex cap 51 and the outer diameter of the convex cap 51 is equal to the aperture of the upper part of the countersunk hole 42. The upper end of the limit rod 5 passes upward through the lower part of the countersunk hole 42 and allows the convex cap 51 to be slidably inserted into the upper part of the countersunk hole 42, thereby making assembly simple and convenient.

[0028] In this embodiment, the limiting ring 3 is provided with a plurality of vertical screw holes 31, each of which corresponds to the limiting rod 5. The lower end of the limiting rod 5 is provided with a thread, and the lower end of the limiting rod 5 is screwed into the corresponding screw hole 31, thereby allowing the limiting rod 5 to be easily assembled and disassembled relative to the limiting ring 3. Of course, in other embodiments, the lower end of the limiting rod 5 can also be connected to the limiting ring 3 by interference fit or other means, and this design is not limited to this.

[0029] In this embodiment, the spring 6 is sleeved on the limiting rod 5 of the same limiting assembly, thereby ensuring that the spring 6 can apply a downward thrust to the limiting ring 3 more stably.

[0030] It should be noted that, in the description of this application, the terms "inside", "outside" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is merely for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on this application. All directional indications (such as up, down, left, right, front, back, inside and outside) are only used to explain the relative positional relationship, movement, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0031] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "in the present embodiment", "specific example", or "some examples" means that the specific features, mechanisms, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0032] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A claw-type positioning tool, comprising a base (1), characterized in that: The base (1) further comprises a plurality of limiting components, wherein a support plate (2) is fixed on the upper portion of the base (1) and a limiting ring (3) which can slide vertically is sleeved on the lower side, the support plate (2) has an outer edge area opposite to the limiting ring (3), the outer edge area is provided with a plurality of vertical through holes (21) distributed in a circumferential manner, the limiting components correspond to the vertical through holes (21) one by one, the limiting components comprise a limiting block (4), a limiting rod (5) and a spring (6), the limiting blocks (4) are all located above the support plate (2) and A limiting area for the spindle nut is formed between the plurality of limiting blocks (4), the upper portion of the limiting block (4) is provided with a claw (41) protruding toward the center of the support plate (2) and used to abut against the top of the spindle nut, the limiting rod (5) is slidably inserted into the corresponding vertical through hole (21), the upper end of the limiting rod (5) is connected to the corresponding limiting block (4) and the lower end is connected to the limiting ring (3), the spring (6) is arranged between the support plate (2) and the limiting ring (3) and is used to apply a downward thrust to the limiting ring (3).

2. The claw-type positioning tool according to claim 1, characterized in that: A cylindrical positioning piece (23) is provided at the center of the support plate (2).

3. The claw-type positioning tool according to claim 2, characterized in that: A vertical mounting hole (22) is provided at the center of the support plate (2); the positioning member (23) is a bolt; the screw end of the positioning member (23) is connected to the mounting hole (22); and the nut end of the positioning member (23) protrudes from the upper side of the support plate (2).

4. The claw-type positioning tool according to claim 1, characterized in that: The limiting block (4) is provided with a countersunk hole (42) with a larger diameter at the top and smaller diameter at the bottom. The upper end of the limiting rod (5) is provided with a convex cap (51) and the outer diameter of the convex cap (51) is equal to the diameter of the upper portion of the countersunk hole (42). The upper end of the limiting rod (5) passes upward through the lower portion of the countersunk hole (42) and enables the convex cap (51) to be slidably inserted into the upper portion of the countersunk hole (42).

5. The claw-type positioning tool according to claim 1, characterized in that: The limiting ring (3) is provided with a plurality of vertical screw holes (31), the screw holes (31) corresponding to the limiting rods (5) one by one, the lower end of the limiting rod (5) is provided with a thread, and the lower end of the limiting rod (5) is screwed to the corresponding screw holes (31).

6. The claw-type positioning tool according to claim 1, characterized in that: The spring (6) is sleeved on the limiting rod (5) of the same limiting assembly.

7. The claw-type positioning tool according to any one of claims 1 to 6, characterized in that: The number of the vertical through holes (21) and the number of the limiting components are both three and are evenly spaced.

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