A device for measuring the inner diameter of a bearing wheel axle hole

Abstract

The utility model provides a device for axle hole inner diameter measurement of supporting wheel, relates to supporting wheel processing technical field, a device for axle hole inner diameter measurement of supporting wheel, including connecting rod, the connecting rod top fixedly connected with a dial indicator, the connecting rod bottom is fixedly provided with a measuring rod, still include crossbeam, the crossbeam top rod setting one up and down through guiding hole, the connecting rod passes through guiding hole and is slidably connected with crossbeam, the crossbeam is perpendicular with the connecting rod, and the lateral wall of guiding hole is provided with mounting hole, and sets up fastening device in mounting hole, the utility model has no matter under whatever state measurement, the measuring rod always keeps perpendicular with the hole axis of measurement, avoids the error of measurement data because of the inclination and so on advantages.

Description

Technical Field

[0001] This utility model relates to the field of support roller processing technology, and in particular to a device for measuring the inner diameter of the support roller shaft hole. Background Technology

[0002] The track roller is a core component of the excavator chassis's "four wheels and one track" system. It mainly bears the weight of the entire machine and guides the movement of the tracks. During the manufacturing process of the track roller, a shaft hole needs to be drilled in the track roller body. During the drilling process, the error inside the shaft hole needs to be measured. The usual method is for technicians to hold a dial indicator and insert it into the shaft hole to make the measurement. However, according to the instruction manual of the inside dial indicator, the measuring rod must be perpendicular to the axis of the hole. If the technician holds the dial indicator by hand, it is difficult to ensure this requirement, which will produce a large error and affect the technician's judgment. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention proposes a device for measuring the inner diameter of a support wheel axle hole, which solves the problem of how to keep the measuring rod perpendicular to the axis of the hole to be measured during measurement.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a device for measuring the inner diameter of a support roller axle hole, comprising a connecting rod, a dial indicator fixedly connected to the top of the connecting rod, and a measuring rod fixedly installed at the bottom of the connecting rod, the measuring rod being perpendicular to the connecting rod. The device is characterized by including a crossbeam, with a through guide hole at the top center of the crossbeam, the connecting rod slidingly connected to the crossbeam through the guide hole, the crossbeam being perpendicular to the connecting rod, and mounting holes respectively provided at the upper and lower ends of the vertical sidewall of the guide hole, with fewer than three mounting holes at each end, and fastening devices installed inside the mounting holes.

[0005] Furthermore, the fastening device includes a spring, a ball support, and a ball bearing. One end of the spring abuts against the innermost side of the mounting hole, and the other end is fixedly connected to the bottom of the ball support. The bottom of the ball support is cylindrical, and the top is a spherical groove. One side of the ball bearing abuts against the spherical groove on the top of the ball support, and the other side abuts against the connecting rod.

[0006] Compared with the prior art, this utility model has the following advantages:

[0007] 1. During measurement, it can ensure that the measuring rod is perpendicular to the hole axis, avoiding errors in measurement data caused by the tilt of the measuring rod.

[0008] 2. It is applicable to the measurement of the inner diameter of holes with different tilt angles, thus broadening the application range of this measuring device. Attached Figure Description

[0009] Figure 1 Here is a structural diagram of the measuring device;

[0010] Figure 2 This is a plan view of the internal structure of area A;

[0011] Figure 3 This is a measurement diagram of the measuring device.

[0012] Legend: 1. Dial indicator; 2. Crossbeam; 3. Connecting rod; 4. Measuring rod; 5. Mounting hole; 6. Fastening device; 61. Spring; 62. Ball holder; 63. Ball bearing; 7. Guide hole; 8. Support roller. Detailed Implementation

[0013] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0014] Reference Figure 1-3 As shown, a device for measuring the inner diameter of a support roller axle hole includes a connecting rod 3. A dial indicator 1 and a measuring rod 4 are fixedly connected to the top and bottom of the connecting rod 3, respectively. The measuring rod 4 is perpendicular to the connecting rod 3. The device also includes a crossbeam 2. A guide hole 7 is provided at the middle of the top of the crossbeam 2. The crossbeam 2 is slidably sleeved on the connecting rod 3. The crossbeam 2 is perpendicular to the connecting rod 3. Mounting holes 5 are provided at the upper and lower ends of the vertical direction of the side wall of the guide hole 7, with fewer than three mounting holes 5 at each end. A fastening device 6 is provided in each mounting hole 5. The fastening device 6 includes a spring 61, a ball support 62, and a ball 63. One end of the spring 61 abuts against the innermost side of the mounting hole 5, and the other end is fixedly connected to the ball support 62. The bottom of the ball support 62 is cylindrical, and the top is a spherical groove. One side of the ball 63 abuts against the spherical groove at the top of the ball support 62, and the other side abuts against the outer surface of the connecting rod 3.

[0015] During measurement, technicians adjust the position of the crossbeam 2 on the connecting rod 3 according to the depth of the shaft hole of the support roller 8. Then, the measuring rod 4 is inserted into the shaft hole of the support roller 8 to be measured, and the crossbeam 2 is placed on the top surface of the support roller 8. The data can be read when the pointer stops swinging. If data from multiple parts needs to be measured, only the height of the connecting rod 3 needs to be adjusted. When measuring the inner diameter of holes with different inclination angles, it is also only necessary to hold the crossbeam 2 tightly against the top surface of the support roller 8 by hand. The ingenious design of this measuring device is that during measurement, the measuring rod 4 needs to be placed into the shaft hole, and the bottom surface of the crossbeam 2 needs to be tightly against the top surface of the support roller 8. At this time, the connecting rod 3 is perpendicular to the axis of the hole. It is known that the connecting rod 3 and the measuring rod 4 are perpendicular to each other. It can be seen that the measuring rod 4 is also perpendicular to the hole axis, which meets the measurement requirements. At the same time, the fastening device 6 ensures the stability of the crossbeam 2 on the connecting rod 3. Even if it is affected by external force during the measurement process, it can maintain the accuracy of the measurement position. The tight contact between the ball 63 and the outer surface of the connecting rod 3, as well as the characteristic of being able to rotate between the ball support 62 and the connecting rod 3, greatly reduces the frictional resistance when the crossbeam 2 slides, making the adjustment of the connecting rod 3 smoother. In addition, this design also makes the inner diameter measuring device widely applicable. It can easily handle shaft holes of different depths or holes with different inclination angles without the need to change other measuring tools, which greatly improves the measurement efficiency.

[0016] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A device for measuring the inner diameter of a support roller axle hole, comprising a connecting rod (3), wherein a dial indicator (1) is fixedly connected to the top end of the connecting rod (3), and a measuring rod (4) is fixedly disposed at the bottom end of the connecting rod (3), wherein the measuring rod (4) is perpendicular to the connecting rod (3), characterized in that, The crossbeam (2) is provided with a guide hole (7) that runs vertically through the middle of the top of the crossbeam (2). The connecting rod (3) passes through the guide hole (7) and is slidably connected to the crossbeam (2). The crossbeam (2) and the connecting rod (3) are perpendicular to each other. The upper and lower ends of the vertical sidewall of the guide hole (7) are respectively provided with mounting holes (5), and the number of mounting holes (5) at each end is less than three. A fastening device (6) is provided in the mounting hole (5).

2. The device for measuring the inner diameter of a support roller axle hole according to claim 1, characterized in that, The fastening device (6) includes a spring (61), a ball support (62), and a ball (63). One end of the spring (61) abuts against the innermost side of the mounting hole (5), and the other end is fixedly connected to the bottom of the ball support (62). The bottom of the ball support (62) is cylindrical, and the top is a spherical groove. One side of the ball (63) abuts against the spherical groove on the top of the ball support (62), and the other side abuts against the connecting rod (3).

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