Shaft concentricity detection jig

Abstract

The utility model discloses a kind of shaft body concentricity detection jigs, including jig base, fixed mounting is installed on the side outer wall of jig base, side machine plate is installed with threaded lead screw in bearing in side machine plate, threaded lead screw is positive and negative type threaded lead screw, the positive and negative thread of threaded lead screw is all screw thread connection with fixture plate, two fixture plates are mirror image and oppositely arranged, the outer wall of the opposite side of two fixture plates is all set with inner groove, two inner grooves are all rotatably installed with two clamping guide wheels, the utility model can detect whether ladder type shaft body is in same concentricity by the mode that two sides guide wheel are relatively clamped, with better shaft body concentricity detection use effect, and the detection jig of the utility model is compared with traditional detection device, its detection structure is more simple, concise as a whole, effectively simplifies, optimizes the structure of existing detection device, greatly reduce the complexity of detection structure, reduce the operation difficulty when detecting.

Description

Technical Field

[0001] This utility model relates to the field of shaft detection technology, specifically a shaft concentricity detection fixture. Background Technology

[0002] Shafts are one of the important parts in machines, used to support rotating parts and transmit motion and power. Shafts generally have some fixed and transmission parts such as gears and bearings, which must be fixed in a certain position. Moreover, interference fit assembly is troublesome. By making it into a stepped shape, the parts can be assembled into the required position one by one. The stepped shaft is also called a tapered shaft. Therefore, stepped shafts are widely used. The diameter of each cross section of the stepped shaft is different to make the strength of each shaft section similar and to facilitate the installation and fixation of the parts on the shaft.

[0003] The prior art CN201721458112.7 discloses a wheel and axle concentricity testing fixture, including a base, and a drive assembly and a testing assembly disposed on the base; the drive assembly includes a bushing for positioning the threaded end of the wheel and a drive motor that drives the bushing via a gearbox; the bushing is positioned on the base by bearings, and the inner sidewall of the bushing is provided with internal threads; the testing assembly includes a longitudinal frame, a longitudinal sliding pair disposed on the longitudinal frame, a transverse sliding pair disposed on the longitudinal sliding pair, and a concentricity testing gauge fixed on the transverse sliding pair; the longitudinal frame is marked with displacement scale along its longitudinal direction, the longitudinal sliding pair moves along the axial direction of the wheel and axle, the transverse sliding pair moves along the radial direction of the wheel and axle, and the probe of the concentricity testing gauge can move along the radial direction of the wheel and axle, and the displacement data of the probe is displayed on the dial;

[0004] Existing technologies can detect the concentricity of wheel and axle step surfaces through structural cooperation, improving detection efficiency and ensuring detection accuracy. Based on the search of existing technologies and the implementation of existing equipment, it was found that the concentricity detection devices of existing technologies are relatively complex in their overall structure, difficult to operate, and have high manufacturing and maintenance costs. The concentricity detection suffers from the technical defect of structural complexity. Therefore, this utility model simplifies and optimizes the design of the concentricity detection structure and proposes a simple shaft concentricity detection fixture. Utility Model Content

[0005] The purpose of this invention is to provide a shaft concentricity testing fixture to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a shaft concentricity testing fixture, comprising a fixture base, a side plate fixedly installed on one outer wall of the fixture base, a threaded screw installed in the side plate via a bearing, the threaded screw being a positive and negative threaded screw, and clamping plates threadedly connected to both the positive and negative threads of the threaded screw, the two clamping plates being arranged mirror images of each other, and inner grooves being formed on the outer walls of the opposite sides of the two clamping plates, with two clamping guide wheels rotatably installed in each of the two inner grooves.

[0007] Preferably, the two clamping guide wheels on the same side are symmetrically distributed vertically.

[0008] Preferably, the clamping guide wheel is an anti-slip silicone wheel.

[0009] Preferably, a linear guide rail is fixedly installed on the upper surface of the fixture base.

[0010] Preferably, a fixing plate is fixedly installed on the lower surface of the clamping plate, and a sliding seat is fixedly installed on the lower surface of the fixing plate.

[0011] Preferably, the sliding seats under both clamping plates are linearly slidably connected to the linear guide rail.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] The inspection fixture of this utility model can detect whether a stepped shaft is concentric by clamping guide wheels on both sides. It has a good effect on shaft concentricity detection. Compared with traditional inspection devices, the inspection fixture of this utility model has a simpler and more concise overall inspection structure. It effectively simplifies and optimizes the structure of existing inspection devices, greatly reduces the complexity of the inspection structure, reduces the difficulty of operation during inspection, and is simple to manufacture and maintain. It improves the effect of simplified structure and has good practical use characteristics, making it suitable for implementation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the testing fixture according to an embodiment of the present utility model;

[0015] Figure 2 This is a bottom view of the detection fixture according to an embodiment of the present invention.

[0016] Figure 3 This is a schematic diagram of the clamp plate assembly structure according to an embodiment of the present utility model;

[0017] Figure 4 This is a schematic diagram of the detection fixture clamping detection state structure according to an embodiment of the present utility model.

[0018] In the diagram: 1. Fixture base; 2. Side plate; 3. Threaded screw; 4. Fixture plate; 5. Inner groove; 6. Clamping guide wheel; 7. Fixing plate; 8. Sliding seat; 9. Linear guide rail. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Please see Figure 1-4 This utility model provides an embodiment of a shaft concentricity testing fixture, comprising a fixture base 1, on one side of the outer wall of the fixture base 1, a side plate 2 fixedly installed, and a threaded screw 3 installed in the side plate 2 via bearings. The threaded screw 3 is a positive and negative threaded screw, and clamping plates 4 are threadedly connected to both the positive and negative threads of the threaded screw 3. The two clamping plates 4 are arranged in mirror image opposite each other. In actual use, the threaded screw 3 can be manually rotated clockwise or counterclockwise. When the threaded screw 3 is rotated clockwise or counterclockwise, the two clamping plates 4 threadedly connected to it will move relative to each other, that is, move away from each other or move closer to each other.

[0023] Furthermore, inner grooves 5 are opened on the outer walls of the two clamping plates 4 on opposite sides, and two clamping guide wheels 6 are rotatably installed in the two inner grooves 5, with the two clamping guide wheels 6 on the same side being symmetrically distributed vertically.

[0024] Based on the above structure, when it is necessary to test the concentricity of the stepped shaft, two testing fixtures of this utility model can be prepared. The smaller diameter end of the shaft is placed between the two clamping plates 4 of one testing fixture, and the larger diameter end of the shaft is placed between the two clamping plates 4 of the other testing fixture. Then, the threaded screw 3 is driven to rotate by manual rotation. Since the threaded screw 3 is a forward and reverse threaded screw, when the threaded screw 3 rotates clockwise or counterclockwise, the two clamping plates 4 connected by its threads will move relative to each other, that is, move away from each other or move closer to each other. When the two clamping plates 4 move closer to each other, the clamping guide wheel 6 between the two clamping plates 4 will clamp the shaft.

[0025] Then, using the above method, the large-diameter shaft at the other end is clamped by the clamping guide wheel 6. After shaking the shaft, if one end of the shaft moves, it indicates that the concentricity of the shaft is poor. If both ends of the shaft are fixed, it indicates that the stepped shaft is in the same concentricity. In this way, the concentricity test of the stepped shaft can be completed.

[0026] In this embodiment, in order to improve the automated rotation effect of the fixture, the threaded screw 3 can also be connected to an external servo motor through a coupling, so that the servo motor can drive the threaded screw 3 to perform automated rotation.

[0027] In this embodiment, in order to improve the anti-slip stability of the clamping guide wheel 6, the clamping guide wheel 6 is an anti-slip silicone wheel, so that the wheel body has a better anti-slip contact effect and improves the contact anti-slip performance.

[0028] In this embodiment, in order to ensure the linear displacement guidance of the fixture plate 4 and maintain its linear displacement effect, a linear guide rail 9 is fixedly installed on the upper surface of the fixture base 1, a fixed plate 7 is fixedly installed on the lower surface of the fixture plate 4, and a sliding seat 8 is fixedly installed on the lower surface of the fixed plate 7. The sliding seats 8 under both fixture plates 4 are linearly slidably connected to the linear guide rail 9. By using the structural cooperation between the sliding seat 8 and the linear guide rail 9, the displacement guidance of the fixture plate 4 when moving left and right can be improved, maintaining its linear displacement effect and improving the detection accuracy.

[0029] Working principle: When it is necessary to test the concentricity of a stepped shaft, two similar testing fixtures of this utility model can be prepared. Then, the smaller diameter end of the shaft is placed between the two clamping plates 4 of one testing fixture, and the larger diameter end of the shaft is placed between the two clamping plates 4 of the other testing fixture, so that the shaft to be tested is mounted on the two testing shafts.

[0030] Then, the threaded screw 3 is driven to rotate manually. Since the threaded screw 3 is a forward and reverse threaded screw, when the threaded screw 3 rotates clockwise or counterclockwise, the two clamping plates 4 connected to it will move relative to each other, that is, move away from each other or move closer to each other. When the two clamping plates 4 move closer to each other, the clamping guide wheel 6 between the two clamping plates 4 will clamp one end of the shaft. The clamping state is shown in the attached instruction manual. Figure 4 As shown, the circular structure between the guide wheels 6 on both sides is the shaft.

[0031] Then, using the above method, the large-diameter shaft at the other end is clamped again by the clamping guide wheel 6. After both testing fixtures clamp the shaft, the shaft is shaken. During this process, if one end of the shaft moves, it indicates that the concentricity of the shaft is poor and there is a concentricity deviation. If both ends of the shaft are fixed, it indicates that the stepped shaft is in the same concentricity. In this way, the concentricity test of the stepped shaft can be completed.

[0032] According to the above description, the testing fixture of this utility model can detect whether the stepped shaft is in the same concentricity by clamping the guide wheels on both sides. It has a good effect on shaft concentricity detection. Compared with traditional testing devices, the testing fixture of this utility model has a simpler and more concise overall testing structure. It effectively simplifies and optimizes the structure of existing testing devices, greatly reduces the complexity of the testing structure, reduces the difficulty of operation during testing, and is simple to manufacture and maintain. It improves the effect of simplified structure and has good practical use characteristics, making it suitable for implementation.

[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A shaft concentricity testing fixture, comprising a fixture base (1), characterized in that, A side plate (2) is fixedly installed on one side of the outer wall of the fixture base (1). A threaded screw (3) is installed in the side plate (2) through a bearing. The threaded screw (3) is a positive and negative threaded screw. A clamping plate (4) is threaded on both the positive and negative threads of the threaded screw (3). The two clamping plates (4) are mirror images of each other. An inner groove (5) is opened on the outer wall of the opposite side of the two clamping plates (4). Two clamping guide wheels (6) are rotatably installed in the two inner grooves (5).

2. The shaft concentricity testing fixture according to claim 1, characterized in that: The two clamping guide wheels (6) on the same side are symmetrically distributed vertically.

3. The shaft concentricity testing fixture according to claim 1, characterized in that: The clamping guide wheel (6) is an anti-slip silicone wheel.

4. The shaft concentricity testing fixture according to claim 1, characterized in that: A linear guide rail (9) is fixedly installed on the upper surface of the fixture base (1).

5. The shaft concentricity testing fixture according to claim 1, characterized in that: A fixing plate (7) is fixedly installed on the lower surface of the clamp plate (4), and a sliding seat (8) is fixedly installed on the lower surface of the fixing plate (7).

6. The shaft concentricity testing fixture according to claim 1, characterized in that: The sliding seats (8) below the two clamping plates (4) are linearly slidably connected to the linear guide rail (9).

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