Shaft sleeve inner diameter measuring tool
By designing a bushing inner diameter measuring fixture, the outer and inner diameters of the bushing are automatically measured using transmission and lifting components and a distance sensor. This solves the problems of inconvenient operation and large errors in the existing technology, and achieves efficient and accurate inner and outer diameter measurement.
Patent Information
- Application Number
- CN202520481735.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-19
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2035-03-19
AI Technical Summary
In the current production and processing of bushings, when measuring the inner and outer diameters in batches, manual inspection is time-consuming, labor-intensive, and prone to errors, while existing measurement fixtures are inconvenient to operate.
Design a bushing inner diameter measuring fixture, which uses a transmission component and a lifting component in conjunction with a distance measuring sensor to automatically measure the outer and inner diameters of the bushing. The transmission component drives the vertical plate to approach and abut against the outer side of the bushing to measure the outer diameter, and the lifting component drives the clamp to move up and down until the axis is aligned to measure the inner diameter.
It enables efficient and accurate measurement of the inner and outer diameters of the bushing, is easy to operate, reduces manual intervention, and improves measurement efficiency and accuracy.
Smart Images
Figure CN223783609U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bushing machining measurement technology, and in particular to a bushing inner diameter measuring fixture. Background Technology
[0002] A bushing is a cylindrical mechanical part fitted onto a rotating shaft and is a component of a sliding bearing. In existing bushing manufacturing processes, it is unavoidable to measure its inner and outer diameters to ensure workpiece quality. However, especially in batch measurements, relying solely on manual inspection is time-consuming, labor-intensive, and prone to measurement errors. While existing technologies use specific measuring fixtures, the bushing is typically first aligned before being manually rotated to measure its inner and outer diameters. This still presents problems of cumbersome use and inconvenient operation. Utility Model Content
[0003] In view of this, the purpose of this utility model is to provide a bushing inner diameter measuring fixture to solve one or more of the problems mentioned above.
[0004] To achieve the above objectives, this utility model provides a bushing inner diameter measuring fixture, including a base:
[0005] The base has symmetrical upright plates on both sides. The bottom end of the upright plates goes into the base and is connected to a transmission component. The base has a card seat in the middle of the two upright plates. The top of the card seat has a slot. When the bushing is placed horizontally on the slot, the shaft center of the bushing is above the center of the slot. The bottom end of the card seat goes into the base and is connected to a lifting component.
[0006] The first distance sensor is installed on the upright plate. The transmission component drives the upright plates on both sides to slide closer to each other until they abut against the outside of the bushing. The distance between the upright plates on both sides is measured by the first distance sensor.
[0007] A back plate is erected on the rear top of the base. The plane of the back plate is perpendicular to the plane of the upright plate. A rotating shaft is vertically rotatably connected to the back plate. A second distance sensor is connected to the side end of the rotating shaft. The axis of the rotating shaft is located above the center of the slot. The lifting assembly drives the slot to move up and down until the axis of the bushing is located at the axis of the rotating shaft. The inner diameter of the bushing is measured by the second distance sensor.
[0008] Preferably, the transmission assembly includes a bidirectional screw that is laterally rotatably connected to the base, and the bottom end of the upright plate passes through the base and engages with the bidirectional screw for transmission.
[0009] Preferably, one end of the bidirectional screw extends out of the base and is connected to a throttle handle.
[0010] Preferably, the slot is designed in a V-shape.
[0011] Preferably, the lifting assembly includes a lead screw that is vertically rotatably connected to the base, with the top end of the lead screw penetrating into the bottom end of the card holder and engaging with the bottom end of the card holder.
[0012] Preferably, a turntable is fixedly connected to the bottom end of the lead screw, and one side of the turntable extends outward from the base.
[0013] Preferably, a groove is provided on the inner side of the upright plate, and a spring post is slidably connected in the groove. One end of the spring post is elastically connected to the groove, and the other end of the spring post is designed with an arc end face. The spring post is pushed by the outer side of the bushing so that when the spring post is fully retracted into the groove, the axis of the bushing is located at the axis of the rotating shaft.
[0014] The beneficial effects of this utility model are as follows: Symmetrical upright plates are provided on both sides of the base, and a retaining seat is provided in the middle of the upright plates on the base. A retaining slot is opened at the top of the retaining seat. A back plate is erected on the rear side of the top of the base, and a rotating shaft is vertically rotatably connected to the back plate. During measurement, the bushing is simply placed horizontally on the retaining slot. The transmission component drives the upright plates on both sides to slide closer to each other until they abut against the outside of the bushing. The distance between the upright plates on both sides is measured by the first distance sensor, which is the outer diameter of the bushing. If the inner diameter also needs to be measured, the retaining seat is moved up and down by the lifting component until the axis of the bushing is located at the axis of the rotating shaft. At this time, the rotating shaft is rotated so that the second distance sensor faces the inner wall of the bushing for detection. The inner diameter of the bushing can then be measured by the second distance sensor. Thus, efficient and accurate inner and outer diameter measurement is completed, and the operation is simple. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0017] Figure 2 This is a schematic diagram of the structure of the bushing of this utility model when it is placed horizontally on the slot;
[0018] Figure 3 For the present utility model Figure 2 Enlarged view of point A in the middle;
[0019] Figure 4 This is a schematic diagram of the structure of the present invention when the upright plate abuts against the outside of the bushing;
[0020] Figure 5 This is a schematic diagram of the structure of the card holder of this utility model when it moves up and down until the center position of the bushing is located at the center position of the rotating shaft;
[0021] Figure 6 This is a schematic diagram of the structure of the second ranging sensor of this utility model when rotating to measure the inner diameter.
[0022] The diagram is marked as follows:
[0023] 100. Bushing; 1. Base; 2. Vertical plate; 21. Slide groove; 22. Spring pin; 3. Transmission assembly; 31. Double-acting screw; 32. Throttle; 4. Card holder; 41. Card slot; 5. Lifting assembly; 51. Lead screw; 52. Turntable; 6. First distance sensor; 7. Back plate; 8. Rotating shaft; 9. Second distance sensor. Detailed Implementation
[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.
[0025] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0026] A bushing inner diameter measuring fixture includes a base 1, with symmetrical upright plates 2 on both sides of the base 1. The bottom ends of the upright plates 2 penetrate into the base 1 and are connected to a transmission assembly 3. A retaining seat 4 is located in the middle of the upright plates 2 on the base 1. The top of the retaining seat 4 has a retaining groove 41. When the bushing 100 is placed horizontally on the retaining groove 41, the axis of the bushing 100 is located above the center of the retaining groove 41. The bottom end of the retaining seat 4 penetrates into the base 1 and is connected to a lifting assembly 5. A first distance sensor 6 is provided on the upright plates 2. The transmission assembly 3 drives the upright plates 2 on both sides to slide closer to each other. When the bushing 100 comes into contact with the outside of the bushing 100, the distance between the two upright plates 2 is measured by the first distance sensor 6. A back plate 7 is erected on the rear side of the top of the base 1. The plane direction of the back plate 7 is perpendicular to the plane direction of the upright plate 2. A rotating shaft 8 is vertically rotatably connected to the back plate 7. A second distance sensor 9 is connected to the side end of the rotating shaft 8. The axis of the rotating shaft 8 is located above the center of the slot 41. The lifting assembly 5 drives the slot 4 to move up and down until the axis of the bushing 100 is located at the axis of the rotating shaft 8. The inner diameter of the bushing 100 is measured by the second distance sensor 9.
[0027] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, this utility model includes a base 1 with symmetrical upright plates 2 on both sides. The bottom ends of the upright plates 2 penetrate into the base 1 and are connected to a transmission assembly 3. Specifically, the plane of the upright plates 2 is parallel to the width of the base 1. The transmission assembly 3 can drive the upright plates 2 on both sides to slide closer or further apart along the length of the base 1. A retaining seat 4 is located in the middle of the upright plates 2 on the base 1. The top of the retaining seat 4 has a slot 41, and the bottom end of the retaining seat 4 penetrates into the base 1 and is connected to a lifting assembly 5. A first ranging sensor 6 is provided on the upright plates 2. A back plate 7 is erected on the rear side of the top of the base 1. The plane of the back plate 7 is perpendicular to the plane of the upright plates 2. A rotating shaft 8 is vertically rotatably connected to the back plate 7, and a second ranging sensor 9 is connected to the side end of the rotating shaft 8. Figure 1 As shown, the axis of the rotating shaft 8 is located above the center of the slot 41. The slot 41 can be designed in a V-shape, so that during measurement, the bushing 100 is simply placed horizontally on the slot 41, and the rotating shaft 8 is inserted into the bushing 100. Figure 2 , Figure 3 As shown, the shaft center of the bushing 100 is naturally located above the center of the slot 41. The transmission assembly 3 drives the two upright plates 2 to slide closer together until they abut against the outside of the bushing 100. Figure 4As shown, the distance between the two upright plates 2 is measured by the first distance sensor 6, which is the outer diameter of the bushing 100. If it is not necessary to measure the inner diameter, the bushing 100 can be removed to complete the measurement. If it is necessary to measure the inner diameter, as shown... Figure 5 As shown, the lifting assembly 5 drives the card holder 4 to move up and down until the axis of the bushing 100 is located at the axis of the rotating shaft 8. At this time, the rotating shaft 8 is rotated, as shown. Figure 6 As shown, the second ranging sensor 9 is positioned towards the inner wall of the bushing 100 for detection. The inner diameter of the bushing 100 can be measured by the second ranging sensor 9. Considering that some bushings 100 have holes on their side walls or notches on their inner walls, the rotation of the rotating shaft 8 drives the second ranging sensor 9 to measure the inner diameter in multiple directions to obtain an accurate inner diameter value. Optionally, the axial rotation of the rotating shaft 8 can be driven by existing conventional drive components such as the geared motor on the back of the back plate 7. Thus, efficient and accurate inner and outer diameter measurement is completed, and the operation is simple.
[0028] Among them, the first ranging sensor 6 and the second ranging sensor 9 can use existing conventional non-contact distance sensors and other components to complete the ranging.
[0029] In the embodiments of this utility model, optionally, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, the transmission assembly 3 includes a bidirectional screw 31 that is laterally rotatably connected to the base 1. The bottom end of the upright plate 2 passes through the base 1 and engages with the bidirectional screw 31 for transmission. Specifically, the bidirectional screw 31 can directly pass through the bottom end of the upright plate 2 and engage with the bottom end of the upright plate 2, or a nut block can be engaged with the bidirectional screw 31 and fixedly connected to the bottom end of the upright plate 2 through the nut block.
[0030] In the embodiments of this utility model, optionally, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, one end of the bidirectional screw 31 extends out of the base 1 and is connected to a handle 32, which allows the handle 32 to be held and rotated axially, thereby causing the two upright plates 2 on both sides to slide relative to each other along the length of the base 1, moving closer or further apart.
[0031] In the embodiments of this utility model, optionally, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6As shown, the lifting assembly 5 includes a lead screw 51 vertically rotatably connected to the base 1. The top end of the lead screw 51 passes into the bottom end of the card holder 4 and engages with the bottom end of the card holder 4. The position of the lead screw 51 avoids the position of the bidirectional screw 31. More preferably, a turntable 52 is fixedly connected to the bottom end of the lead screw 51. One side of the turntable 52 extends outward from the base 1, so that by manually turning the turntable 52, the lead screw 51 is driven to rotate axially, thereby driving the card holder 4 to move up and down.
[0032] In the embodiments of this utility model, optionally, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, a groove 21 is provided on the inner side of the upright plate 2. A spring post 22 is slidably connected to the groove 21. One end of the spring post 22 that penetrates into the groove 21 is elastically connected to the groove 21. Specifically, the elastic connection can be achieved using conventional elastic components such as springs. The end of the spring post 22 that protrudes from the groove 21 has an arc-shaped end face design. Specifically, conventional components such as distance sensors can be provided on the inner side of the groove 21 for detecting the spring post 22. The outer side of the bushing 100 pushes the spring post 22 so that when the spring post 22 is fully retracted into the groove 21, that is, when the outer end face of the spring post 22 is flush with the inner plane of the upright plate 2, such as... Figure 6 As shown, the center position of the bushing 100 is located at the center position of the rotating shaft 8. At this time, the distance sensor in the slide groove 21 is triggered, which reminds the staff to adjust it into place and start the measurement of the inner diameter.
[0033] The distance sensor in the slide 21 can be electrically connected to equipment such as a flashing light on the tooling. When the distance sensor in the slide 21 senses that the distance between itself and the spring 22 reaches a preset value, that is, when the outer end face of the spring 22 is flush with the inner side plane of the upright plate 2, the flashing light is triggered to light up the equipment, thereby reminding the staff that the inner diameter measurement can begin.
[0034] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.
Claims
1. A bushing inner diameter measuring fixture, comprising a base (1), characterized in that: The base (1) is symmetrically provided with upright plates (2) on both sides. The bottom end of the upright plate (2) is inserted into the base (1) and connected to a transmission component (3). The base (1) is provided with a card seat (4) at the middle position of the upright plates (2) on both sides. The top of the card seat (4) is provided with a card groove (41). When the bushing (100) is placed horizontally on the card groove (41), the axis of the bushing (100) is located above the center position of the card groove (41). The bottom end of the card seat (4) is inserted into the base (1) and connected to a lifting component (5). The vertical plate (2) is provided with a first distance sensor (6). The transmission assembly (3) drives the two vertical plates (2) to slide closer to each other until they come into contact with the outside of the bushing (100). The distance between the two vertical plates (2) is measured by the first distance sensor (6). A back plate (7) is erected on the rear side of the top of the base (1). The plane direction of the back plate (7) is perpendicular to the plane direction of the upright plate (2). A rotating shaft (8) is vertically rotatably connected to the back plate (7). A second distance sensor (9) is connected to the side end of the rotating shaft (8). The axis of the rotating shaft (8) is located above the center of the slot (41). The lifting assembly (5) drives the card seat (4) to move up and down until the axis of the bushing (100) is located at the axis of the rotating shaft (8). The inner diameter of the bushing (100) is measured by the second distance sensor (9).
2. The bushing inner diameter measuring fixture according to claim 1, characterized in that, The transmission assembly (3) includes a bidirectional screw (31) that is laterally rotatably connected to the base (1), and the bottom end of the upright plate (2) is inserted into the base (1) and meshes with the bidirectional screw (31) for transmission connection.
3. The bushing inner diameter measuring fixture according to claim 2, characterized in that, One end of the bidirectional screw (31) extends out of the base (1) and is connected to a throttle (32).
4. The bushing inner diameter measuring fixture according to claim 1, characterized in that, The slot (41) is designed in a V-shape.
5. The bushing inner diameter measuring fixture according to claim 1, characterized in that, The lifting assembly (5) includes a lead screw (51) that is vertically rotatably connected to the base (1). The top end of the lead screw (51) passes into the bottom end of the card holder (4) and engages with the bottom end of the card holder (4).
6. The bushing inner diameter measuring fixture according to claim 5, characterized in that, The bottom end of the lead screw (51) is fixedly connected to a turntable (52), and one side of the turntable (52) extends outward through the base (1).
7. The bushing inner diameter measuring fixture according to claim 1, characterized in that, The inner side of the upright plate (2) is provided with a sliding groove (21). A spring post (22) is slidably connected in the sliding groove (21). One end of the spring post (22) is inserted into the sliding groove (21) and is elastically connected to the sliding groove (21). The end of the spring post (22) that is inserted out of the sliding groove (21) is designed with an arc end face. The spring post (22) is pushed by the outside of the bushing (100) so that when the spring post (22) is completely retracted into the sliding groove (21), the axis of the bushing (100) is located at the axis of the rotating shaft (8).