A bearing height measuring device

Abstract

A bearing height measuring device, comprising a base, a dial indicator, a lifting unit, a lifting seat, a movable frame; the bottom of the base is provided with a bottom plate, the upper surface of the bottom plate forms a support surface, and a pressing plate covers the top surface of the bearing outer ring; the lifting seat is located above the pressing plate, is installed on the base and can move along the height direction of the base between a first position where the pressing plate is pressed and a second position away from the pressing plate, the lifting unit is used for pulling the lifting seat upward from the first position to the second position; a counterweight is detachably fixed on the lifting seat; the movable frame can move along the height direction of the base, a cantilever and a support rod are arranged on the movable frame, when the lifting seat is in the first position, the cantilever is separated from the lifting seat, and the bottom end of the support rod is supported on the support surface; the dial indicator is fixed on the movable frame and the measuring head thereon extends downward. The present application improves the precision of bearing height measurement.

Description

Technical Field

[0001] This invention relates to the field of bearing measurement technology, and in particular to a bearing height measuring device. Background Technology

[0002] Bearings are core components of rotating structures and are widely used in vehicles, especially in axle assemblies. Their precision is a crucial factor determining vehicle performance. Therefore, before assembling bearings into the axle assembly, they need to be measured to ensure performance. For example, bearing height is typically measured to improve assembly accuracy between various components in the axle assembly. Current measurement methods involve supporting the bearing inner ring on a support platform, applying a specific force to the outer ring, and then measuring the bearing height using measuring tools. However, because the magnitude of the force applied to the outer ring is difficult to maintain consistently, the measurement process is challenging and results in low accuracy. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the purpose of this invention is to provide a bearing height measuring device to improve the accuracy of bearing height measurement.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A bearing height measuring device includes a base, a dial indicator, a lifting unit, a lifting seat, and a movable frame;

[0006] A base plate is provided at the bottom of the base, and the upper surface of the base plate forms a support surface for supporting the bottom surface of the inner ring of the bearing. A pressure plate is covered on the top surface of the outer ring of the bearing.

[0007] The lifting seat is located above the pressure plate. The lifting seat is mounted on the base and can move between a first position pressed on the pressure plate and a second position away from the pressure plate along the height direction of the base. The lifting unit is used to pull the lifting seat upward from the first position to the second position. A counterweight is detachably fixed on the lifting seat.

[0008] The movable frame can move along the height direction of the base. The movable frame is equipped with a cantilever and a downwardly extending support rod. The cantilever cooperates with the lifting seat to push the cantilever upward when the lifting seat moves to the second position. When the lifting seat is in the first position, the cantilever separates from the lifting seat, and the bottom end of the support rod is supported on the support surface.

[0009] The dial indicator is fixed on the movable frame with its measuring head extending downwards. When the lifting seat is in the first position, the measuring head presses against the upper surface of the pressure plate.

[0010] The lifting unit is a cylinder. The cylinder body is fixed to the top of the base. The cylinder's telescopic rod extends downward. The lifting seat is provided with a shaft hole extending downward from its top surface. The cylinder's telescopic rod passes through the shaft hole from top to bottom. A limiting surface is provided on the inner wall of the shaft hole. A flange protrudes radially outward from the cylinder's telescopic rod and is located below the limiting surface.

[0011] The counterweight is set on the top of the lifting base and is fixedly connected to the lifting base by fastening bolts. The counterweight is provided with a through groove to avoid the telescopic rod of the extension cylinder.

[0012] The bottom of the lifting platform is equipped with a support plate, and the cantilever is placed above the support plate.

[0013] The portion of the lifting seat located above the support plate forms a receiving cavity. The dial indicator is fixed on the cantilever and located inside the receiving cavity. The support plate is provided with a through hole for the measuring head of the dial indicator to pass through.

[0014] The central axis of the through hole coincides with the central axis of the bearing.

[0015] A column fixed to the base plate is provided on the base. A first guide rail extending along the height direction of the base is installed on the column. A first slide is fixedly connected to the lifting seat and is slidably installed on the first guide rail. A second guide rail extending along the height direction of the base is provided on the first slide and a second slide is slidably installed on the second guide rail. A movable frame is fixedly connected to the second slide.

[0016] The movable frame is provided with mounting holes extending upward from its lower end, and the support rod passes upward through the mounting holes and is threaded into the mounting holes.

[0017] A clamping block is fixed to the cantilever by locking bolts, and the dial indicator is clamped between the clamping block and the cantilever.

[0018] A positioning block protruding from the support surface is fixed on the base plate. This positioning block is used to insert into the inner ring of the bearing to position the bearing.

[0019] The beneficial effects of this invention are as follows:

[0020] When measuring bearing height, this invention uses a lifting seat and a counterweight on the lifting seat to press the bearing outer ring downwards. The force on the bearing outer ring during measurement is the weight of the lifting seat and the counterweight, thus allowing for accurate calculation of the pressure value on the bearing outer ring. Furthermore, if the force on the bearing outer ring is unreasonable, the pressure on the bearing outer ring can be adjusted by removing or replacing the counterweight, thereby improving the accuracy of bearing height measurement. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention;

[0022] Figure 2 This is a schematic diagram of one working state of the present invention;

[0023] Figure 3 This is a schematic diagram of another working state of the present invention. Detailed Implementation

[0024] The present invention will now be further described with reference to the accompanying drawings and specific embodiments:

[0025] like Figure 1 , 2 As shown in Figure 3, a bearing height measuring device of the present invention includes a base, a dial indicator 30, a cylinder 60, a lifting seat 40, and a movable frame 20. A horizontally placed base plate 10 is provided at the bottom of the base, and a support surface 101 is formed on the upper surface of the base plate 10. During measurement, the bearing 90 is placed on the support surface 101, so that the support surface 101 supports the lower end of the bearing inner ring 91. The support surface 101 supports the bearing inner ring 91, so that the bearing 90 is kept horizontal. At the same time, a pressure plate 70 is covered on the top surface of the bearing outer ring 92, and the edge of the pressure plate 70 is pressed on the bearing outer ring 92. The lifting seat 40 is located above the pressure plate 70. It is mounted on a base and can move along the height direction of the base between a first position pressing against the pressure plate 70 and a second position away from the pressure plate 70. The cylinder 60 is used to pull the lifting seat 40 upward. Specifically, when the lifting seat 40 is in the first position, the cylinder 60 can pull the lifting seat 40 upward to the second position, separating the lifting seat 40 from the pressure plate 70. When the extension rod 61 of the cylinder 60 moves downward, the lifting seat 40 moves downward according to its own weight. When the extension rod 61 of the cylinder 60 moves downward to its maximum displacement, the entire weight of the lifting seat 40 will be applied to the pressure plate 70. A counterweight 50 is detachably fixed on the lifting seat 40. The movable frame 20 has a degree of freedom to move along the height direction of the base. A cantilever 22 extending laterally and a support rod 21 extending vertically downward are provided on the movable frame 20. The dial indicator 30 is fixedly installed on the movable frame 20. The cantilever 22 cooperates with the lifting seat 40. When the lifting seat 40 moves upward toward the second position, the lifting seat 40 can pull the cantilever 22 to move the movable frame 20 upward. When the lifting seat 40 is in the first position, the cantilever 22 descends by its own weight and separates from the lifting seat 40. At the same time, the bottom end of the support rod 21 is supported by the support surface 101, so that the movable frame 20 is at the corresponding height, and then the dial indicator 30 is at the corresponding height. The measuring head of the dial indicator 30 is pressed against the upper surface of the pressure plate 70. At this time, the dial indicator 30 is in a state where it can measure the height of the bearing 90.

[0026] See Figure 2 The lifting seat 40 is in the first position, and in this state, the measuring device is in the state of performing measurement; Figure 3 In the shown state, the lifting seat 40 is in the second position. In this state, the lifting seat 40 is separated from the pressure plate 70. Simultaneously, due to the cooperation between the lifting seat 40 and the cantilever 22, when the lifting seat 40 moves upward from the first position to the second position, the movable frame 20 drives the dial indicator 30 to move upward by a certain displacement. The measuring head of the dial indicator 30 separates from the pressure plate 70, and the support rod 21 separates from the support surface 101. When measuring the height of the bearing 90, the measuring device is in the following position: Figure 3 As shown, a support block is placed at the position where the bearing 90 is placed on the support surface 101. The height of the support block is a known standard height. The pressure plate 70 is placed on the support block, and the cylinder 60 is activated to move the lifting seat 40 and the movable frame 20 downwards. Figure 2 In the indicated state, the measuring head of dial indicator 30 is pressed against the upper surface of pressure plate 70, and the reading of dial indicator 30 is adjusted to zero. Start cylinder 60 to pull lifting seat 40 back to the second position, then place bearing 90 on support surface 101 for measurement. Place pressure plate 70 on bearing 90, so that the edge of pressure plate 70 presses against the outer ring 92 of bearing. Start cylinder 60 again, and the telescopic rod 61 of cylinder 60 moves down. Lifting seat 40 descends under its own weight and presses against pressure plate 70. At the same time, the bottom end of support rod 21 supports support surface 101, and the measuring head of dial indicator 30 presses against the upper surface of pressure plate 70. Read the reading of dial indicator 30. Thus, the actual height of bearing 90 is the sum of the height of the support block marked with the height and the dial indicator reading.

[0027] When measuring bearing height, this invention uses a lifting seat 40 and a counterweight 50 located on the lifting seat 40 to press the outer ring of the bearing downwards. The force borne by the outer ring of the bearing during measurement is the weight of the lifting seat 40 and the counterweight 50, thus allowing the pressure value on the outer ring of the bearing to be accurately calculated. Furthermore, if the force on the outer ring of the bearing is unreasonable, the pressure on the outer ring of the bearing can be adjusted by removing the counterweight 50 or replacing it with a different counterweight 50, thereby improving the accuracy of bearing height measurement.

[0028] In a preferred embodiment, the present invention mounts the cylinder 60 on the top of the base, wherein a column 11 extending along the height direction is fixed on the base plate 10, a horizontal mounting plate 14 is fixed on the top of the column 11, the cylinder body of the cylinder 60 is fixed on the mounting plate 14, and its telescopic rod 61 extends downward; the lifting seat 40 is provided with a shaft hole 42 extending downward from its top surface, the telescopic rod 61 of the cylinder 60 passes through the shaft hole 42 from top to bottom, a limiting surface 421 is provided on the inner wall of the shaft hole 42, and a radially outwardly protruding flange 611 is provided on the telescopic rod 61, the flange 611 being located below the limiting surface 421. Figure 2In the indicated state, the flange 611 is separated from the limiting surface 421 by a certain distance, so that the lifting seat 40 is completely separated from the telescopic rod 61. The telescopic rod 61 does not exert an upward pulling force on the lifting seat 40, thereby ensuring that the weight of the lifting seat 40 can be fully pressed onto the pressure plate 70. After the telescopic rod 61 moves upward a certain distance, the flange 611 abuts against the bottom of the limiting surface 421, so that when the telescopic rod 61 continues to move upward, it can pull the lifting seat 40 upward. Furthermore, to facilitate the installation of the counterweight 50, the present invention places the counterweight 50 on the top of the lifting seat 30, and the counterweight 50 is fixedly connected to the lifting seat 40 by fastening bolts 51. In addition, a through groove 52 is provided on the counterweight 50, which extends from one side of the counterweight 50 to the other side, so that the counterweight 50 forms a roughly U-shaped structure. When installing or removing the counterweight 50, the telescopic rod 61 of the cylinder 60 can pass through the through groove 52, thereby avoiding interference.

[0029] It should be noted that in the above embodiments of the present invention, a cylinder 60 is used as a lifting unit to drive the lifting seat 40 to move upward. In fact, in order to enable the lifting seat 40 to move from the first position to the second position, the lifting unit can also be a linear motor, a manual push rod or other mechanism.

[0030] In another preferred embodiment, a support plate 41 is provided at the bottom of the lifting seat 40, and the cantilever 22 is placed below the support plate 41. When the lifting seat 40 moves upward, the support plate 41 can push the cantilever 22 to move upward. The part of the lifting seat 40 above the support plate 41 forms a hollow receiving cavity. The dial indicator 30 is placed inside the receiving cavity after being installed on the movable frame 20. At the same time, a through hole 411 is provided on the support plate 41. The measuring head of the dial indicator 30 passes through the through hole 411 from top to bottom and can be pressed against the middle part of the upper surface of the pressure plate 70. In this way, the lifting seat 40 can protect the dial indicator 30. At the same time, the measuring head of the dial indicator 30 can press against the middle part of the pressure plate 70, that is, measure at the center position, thereby further improving the measurement accuracy. Furthermore, the central axis of the through hole 411 can be made to coincide with the central axis of the bearing 90, so that the measuring head of the dial indicator 30 can be on the central axis of the bearing 90.

[0031] To enable the lifting seat 40 and the movable frame 20 to move flexibly up and down while avoiding friction affecting measurement accuracy, the present invention installs a first guide rail 111 extending along the height direction of the base on the column 11. A first slide 12 is fixedly connected to the lifting seat 40, and a first slider 112 is fixedly installed on the first slide 12. The first slider 112 cooperates with the first guide rail 111 to slide the first slide 12 onto the column 11. At the same time, a second guide rail 121 is provided on the first slide 12, and a second slide 13 is slidably installed on the second guide rail 121 via a second slider 122. The movable frame 20 is fixedly connected to the second slide 13.

[0032] The movable frame 20 is also provided with a mounting hole extending upward from its lower end. The support rod 21 passes through the mounting hole and is threaded into it. In this way, the height of the support rod 21 can be adaptively adjusted according to the installation height of the dial indicator 30, so that the measuring head on the dial indicator 30 can be properly pressed onto the pressure plate 70. A clamping block 23 is provided at the end of the cantilever 22. The clamping block 23 is fixed to the cantilever 22 by a locking bolt 24. The dial indicator 30 is clamped between the clamping block 23 and the cantilever 22. Specifically, the bushing of the dial indicator 30 is clamped by the clamping block 23 and the cantilever 22 to fix the dial indicator 30 to the cantilever 22.

[0033] To facilitate measurement, the present invention also fixes a positioning block 102 on the base plate 10. The positioning block 102 is circular and protrudes from the support surface 101. When measuring the bearing 90, the bearing 90 is placed on the support surface 101 and the positioning block 102 is inserted into the inner ring 102 of the bearing 90, thereby positioning the bearing 90 by means of the positioning block 102 to prevent the bearing 90 from shifting.

[0034] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A bearing height measuring device, characterized in that, Includes base, dial indicator, lifting unit, lifting seat, and movable frame; A base plate is provided at the bottom of the base, and the upper surface of the base plate forms a support surface for supporting the bottom surface of the inner ring of the bearing. A pressure plate is covered on the top surface of the outer ring of the bearing. The lifting seat is located above the pressure plate. The lifting seat is mounted on the base and can move between a first position pressed on the pressure plate and a second position away from the pressure plate along the height direction of the base. The lifting unit is used to pull the lifting seat upward from the first position to the second position. A counterweight is detachably fixed on the lifting seat. The movable frame can move along the height direction of the base. The movable frame is equipped with a cantilever and a downwardly extending support rod. The cantilever cooperates with the lifting seat to push the cantilever upward when the lifting seat moves to the second position. When the lifting seat is in the first position, the cantilever separates from the lifting seat, and the bottom end of the support rod is supported on the support surface. The dial indicator is fixed on the movable frame with its measuring head extending downwards. When the lifting seat is in the first position, the measuring head presses against the upper surface of the pressure plate.

2. The bearing height measuring device as described in claim 1, characterized in that, The lifting unit is a cylinder. The cylinder body is fixed to the top of the base. The cylinder's telescopic rod extends downward. The lifting seat is provided with a shaft hole extending downward from its top surface. The cylinder's telescopic rod passes through the shaft hole from top to bottom. A limiting surface is provided on the inner wall of the shaft hole. A flange protrudes radially outward from the cylinder's telescopic rod and is located below the limiting surface.

3. The bearing height measuring device as described in claim 2, characterized in that, The counterweight is set on the top of the lifting base and is fixedly connected to the lifting base by fastening bolts. The counterweight is provided with a through groove for the telescopic rod of the avoidance cylinder.

4. The bearing height measuring device as described in claim 1, characterized in that, The bottom of the lifting platform is equipped with a support plate, and the cantilever is placed above the support plate.

5. The bearing height measuring device as described in claim 4, characterized in that, The portion of the lifting seat located above the support plate forms a receiving cavity. The dial indicator is fixed on the cantilever and located inside the receiving cavity. The support plate is provided with a through hole for the measuring head of the dial indicator to pass through.

6. The bearing height measuring device as described in claim 5, characterized in that, The central axis of the through hole coincides with the central axis of the bearing.

7. The bearing height measuring device as described in claim 1, characterized in that, A column fixed to the base plate is provided on the base. A first guide rail extending along the height direction of the base is installed on the column. A first slide is fixedly connected to the lifting seat and is slidably installed on the first guide rail. A second guide rail extending along the height direction of the base is provided on the first slide and a second slide is slidably installed on the second guide rail. A movable frame is fixedly connected to the second slide.

8. The bearing height measuring device as described in claim 1, characterized in that, The movable frame is provided with mounting holes extending upward from its lower end, and the support rod passes upward through the mounting holes and is threaded into the mounting holes.

9. The bearing height measuring device as described in claim 1, characterized in that, A clamping block is fixed to the cantilever by locking bolts, and the dial indicator is clamped between the clamping block and the cantilever.

10. The bearing height measuring device as described in claim 1, characterized in that, A positioning block protruding from the support surface is fixed on the base plate. This positioning block is used to insert into the inner ring of the bearing to position the bearing.

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