A cam detection fixture

Abstract

This utility model discloses a cam detection fixture, including a base, a base plate fixedly connected to one end of the base, a cam positioning mechanism mounted on the base plate, two guide rails at the other end of the base, a slide plate slidably connected to the two guide rails, a swing arm positioning mechanism mounted on the slide plate, and a drive mechanism on the base to drive the slide plate to slide on the guide rails. A mounting plate is connected to one side of the base plate, and a positioning plate opposite the mounting plate is connected to one side of the slide plate. A dial indicator is mounted on the mounting plate, with the measuring rod of the dial indicator facing the positioning plate. The cam is fixed by the cam positioning mechanism, and the swing arm is fixed by the swing arm positioning mechanism. By controlling the movement of the slide plate, the swing arm is brought closer to the cam. During this process, the distance between the slide plate and the base plate is measured by the interaction of the dial indicator and the positioning plate to find the optimal installation distance between the cam and the swing arm.

Description

Technical Field

[0001] This utility model relates to the field of testing tooling technology, specifically a cam testing tooling. Background Technology

[0002] The loom has a beat-up cam, such as Figure 2 As shown, it includes a cam 12 and a rocker arm 13. The cam 12 consists of a camshaft 121 and a conjugate cam 122. The rocker arm 13 includes a rocker arm shaft 131, a spur block 132 connected to the rocker arm shaft, and two rocker arm wheels 133 connected to the spur block. The conjugate cam 122 and the rocker arm wheels 133 cooperate with each other. The rotation of the camshaft 121 drives the conjugate cam 122 to rotate, and the cooperation between the conjugate cam 122 and the rocker arm wheels 133 drives the rocker arm shaft 131 to rotate. When installing the cam and rocker arm, the cam and rocker arm need to be kept stable before rotatably installing the camshaft 121 and the rocker arm shaft 131 onto the same side plate 14. Special attention should be paid to the distance between the camshaft and the rocker arm shaft during installation so that when the camshaft rotates, it can drive the rocker arm shaft to rotate through the cooperation between the conjugate cam and the rocker arm wheels. However, currently, it is difficult to accurately measure the distance between the cam and the rocker arm during installation, resulting in inconvenience in installation. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a cam detection fixture to solve the problem of difficulty in measuring the optimal distance between the cam and the rocker arm during installation.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0005] A cam inspection fixture includes a base, one end of which is fixedly connected to a base plate, on which a cam positioning mechanism is mounted. The other end of the base has two guide rails, on which a slide plate is slidably connected. Specifically, sliders are fixedly connected to both sides of the bottom surface of the slide plate, and the bottom surface of the sliders has grooves through which they are slidably connected to the guide rails. A swing arm positioning mechanism is mounted on the slide plate, and the base has a drive mechanism for driving the slide plate to slide on the guide rails. A mounting plate is connected to one side of the base plate, and a positioning plate opposite the mounting plate is connected to one side of the slide plate. A dial indicator is mounted on the mounting plate, with the measuring rod of the dial indicator facing the positioning plate.

[0006] Preferably, the cam positioning mechanism includes two first support plates fixedly connected to the base plate and a first pressure plate connected to the upper end of the first support plates by bolts. The two first support plates are arranged opposite to each other, and the opposite surfaces of the first support plates and the first pressure plate are provided with a semi-circular first clamping groove.

[0007] The above technical solution places the camshaft of the cam in the first clamping groove of the two first support plates, and then fixes the first pressure plate on the first support plate with bolts. The first pressure plate presses the camshaft tightly against the first support plate, thereby keeping the cam stable.

[0008] Preferably, the swing arm positioning mechanism includes two second support plates fixedly connected to the slide plate and a second pressure plate connected to the second support plates by bolts. The two second support plates are arranged opposite to each other. The opposite surfaces of the second support plates and the second pressure plate are provided with semi-circular second clamping grooves. The second support plates and the corresponding first support plates are on the same vertical plane, and the centers of the first clamping groove and the second clamping groove are on the same horizontal line.

[0009] The above technical solution places the swing arm shaft in the second clamping groove of the two second support plates, and then fixes the second pressure plate on the second support plate with bolts. The second pressure plate presses the swing arm shaft tightly onto the second support plate, thereby keeping the swing arm stable.

[0010] Preferably, the drive mechanism includes an electric telescopic rod mounted on the base and a transmission block fixedly connected to the bottom surface of the slide plate, with the telescopic end of the electric telescopic rod connected to the transmission block.

[0011] The above technical solution, by controlling the operation of the electric telescopic rod, can drive the slide plate to slide along the guide rail, thereby adjusting the distance between the slide plate and the base plate.

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

[0013] The cam is fixed by a cam positioning mechanism, and the swing arm is fixed by a swing arm positioning mechanism, so that the conjugate cam is aligned with the swing arm wheel. Then, the sliding plate is controlled by a drive mechanism to move the swing arm closer to the cam. During this process, the distance between the sliding plate and the base plate is measured by a dial indicator in conjunction with the positioning plate. By finding the optimal installation distance between the cam and the swing arm, side plates are then installed on the cam and the swing arm so that when the cam rotates, it can drive the swing arm to rotate. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the cam and the rocker arm after assembly;

[0016] In the diagram: 1-base, 2-base plate, 3-cam positioning mechanism, 301-first support plate, 302-first pressure plate, 4-guide rail, 5-slide plate, 6-swing arm positioning mechanism, 601-second support plate, 602-second pressure plate, 7-mounting plate, 8-positioning plate, 9-dial indicator, 10-electric telescopic rod, 11-slider, 12-cam, 121-camshaft, 122-conjugate cam, 13-swing arm, 131-swing arm shaft, 132-swing arm block, 133-swing arm wheel, 14-side plate. Detailed Implementation

[0017] 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.

[0018] Please see Figure 1-2 A cam detection fixture includes a base 1, a base plate 2 fixedly connected to one end of the base 1, a cam positioning mechanism 3 installed on the base plate 2, a guide rail 4 provided at the other end of the base 1, a slide plate 5 slidably connected to the guide rail 4, the guide rail 4 consists of two rails, and sliders 11 are fixedly connected to both sides of the bottom surface of the slide plate 5. The bottom surface of the slider 11 is provided with a sliding groove and is slidably connected to the guide rail 4 through the sliding groove.

[0019] The slide plate 5 is equipped with a swing arm positioning mechanism 6, and the base 1 is provided with a drive mechanism for driving the slide plate 5 to slide on the guide rail 4. The drive mechanism includes an electric telescopic rod 10 mounted on the base 1 and a transmission block fixedly connected to the bottom surface of the slide plate. The telescopic end of the electric telescopic rod 10 is connected to the transmission block. By controlling the operation of the electric telescopic rod 10, the slide plate 5 can be driven to slide along the guide rail 4, thereby adjusting the distance between the slide plate 5 and the base plate 2.

[0020] A mounting plate 7 is connected to one side of the base plate 2 on the base 1, and a positioning plate 8 opposite to the mounting plate is connected to one side of the sliding plate 5. A dial indicator 9 is mounted on the mounting plate 7, with the measuring rod of the dial indicator 9 facing the positioning plate 8. A dial indicator is a comparative measuring instrument consisting of a measuring head, measuring rod, clamping sleeve, body, dial, and brake. The working principle of the dial indicator is to convert the linear displacement of the measuring rod into an angular change of the pointer on the dial through a mechanical transmission system. Specifically, when the measuring rod moves 1 mm, this movement is amplified by a rack, pinion, or other gear and transmitted to the pointer, causing the pointer to rotate. The linear displacement is then converted into the rotational motion of the pointer through gears or levers, and the reading is displayed on the dial. It is mainly used to measure the shape and positional errors of workpieces, such as roundness, flatness, and perpendicularity, and is also used for precision alignment. The dial indicator is existing technology, and its specific structure and principle will not be described in detail in this invention.

[0021] The cam positioning mechanism 3 includes two first support plates 301 fixedly connected to the base plate 2, and a first pressure plate 302 bolted to the first support plates. The two first support plates 301 are arranged opposite to each other, and the opposite surfaces of the first support plates 301 and the first pressure plate 302 are provided with semi-circular first clamping grooves. The camshaft of the cam is placed in the first clamping grooves of the two first support plates, and then the first pressure plate is fixed to the first support plate with bolts. The first pressure plate presses the camshaft tightly against the first support plate, thereby keeping the cam stable.

[0022] The swing arm positioning mechanism 6 includes two second support plates 601 fixedly connected to the slide plate 5, and a second pressure plate 602 bolted to the second support plates. The two second support plates 601 are arranged opposite to each other, and each of the opposite surfaces of the second support plates 601 and the second pressure plate 602 is provided with a semi-circular second clamping groove. The second support plates 601 and the corresponding first support plates 301 are on the same vertical plane, and the centers of the first and second clamping grooves are on the same horizontal line. The diameter of the first clamping groove is larger than the diameter of the second clamping groove. The swing arm shaft is placed in the second clamping groove of the two second support plates, and then the second pressure plate is fixed to the second support plate with bolts. The second pressure plate presses the swing arm shaft tightly against the second support plate, thereby keeping the swing arm stable.

[0023] The working principle of this utility model is as follows:

[0024] First, the camshaft 121 of the cam 12 is placed in the first groove of the two first support plates 301. Then, the first pressure plate 302 is fixed to the first support plate 301 with bolts, pressing the camshaft 121 tightly against the first support plate 301, thereby stabilizing the cam 12. Next, the rocker arm shaft 131 of the rocker arm 13 is placed in the second groove of the two second support plates 601. Then, the second pressure plate 602 is fixed to the second support plate 601 with bolts, pressing the rocker arm shaft 131 tightly against the second support plate 301, thereby stabilizing the rocker arm 13.

[0025] Next, side plate 14 is prepared, with a rotary bearing pre-installed on it. Then, the electric telescopic rod 10 is extended, pushing the slide plate 5 along the guide rail 4 towards the base plate 2. As the slide plate 5 moves, the measuring rod of the dial indicator 9 contacts the positioning plate 7. Based on the movement distance of the positioning plate 7, the distance between the slide plate 5 and the base plate 2 is measured. Through repeated testing, the optimal distance between the cam 12 and the swing arm 13 is found and recorded. Then, side plate 14 is mounted on the camshaft 121 and the swing arm shaft 131 via the rotary bearing, so that when the camshaft 12 rotates, the conjugate cam 122 can engage with the swing arm wheel, thereby driving the swing arm to rotate. Subsequent assembly of the cam 12 and the swing arm 13 only requires reading the dial indicator value and ensuring it matches the recorded value, thus improving the installation efficiency of the cam and swing arm.

[0026] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cam detection fixture, characterized in that: The base (1) is fixedly connected to a base plate (2) at one end. A cam positioning mechanism (3) is installed on the base plate (2). A guide rail (4) is provided at the other end of the base (1). A slide plate (5) is slidably connected on the guide rail (4). A swing arm positioning mechanism (6) is installed on the slide plate (5). A driving mechanism for driving the slide plate (5) to slide on the guide rail (4) is provided on the base (1). A mounting plate (7) is connected to one side of the base plate (2) on the base (1). A positioning plate (8) opposite to the mounting plate is connected to one side of the slide plate (5). A dial indicator (9) is installed on the mounting plate (7). The measuring rod of the dial indicator (9) faces the positioning plate (8).

2. The cam detection fixture according to claim 1, characterized in that: The cam positioning mechanism (3) includes two first support plates (301) fixedly connected to the base plate (2) and a first pressure plate (302) connected to the first support plates by bolts. The two first support plates (301) are arranged opposite to each other, and the opposite surfaces of the first support plates (301) and the first pressure plate (302) are provided with a semi-circular first clamping groove.

3. The cam detection fixture according to claim 2, characterized in that: The swing arm positioning mechanism (6) includes two second support plates (601) fixedly connected to the slide plate (5) and a second pressure plate (602) connected to the second support plates by bolts. The two second support plates (601) are arranged opposite to each other. The opposite surfaces of the second support plates (601) and the second pressure plate (602) are provided with a semi-circular second clamping groove. The second support plate (601) and the corresponding first support plate (301) are on the same vertical plane, and the centers of the first clamping groove and the second clamping groove are on the same horizontal line.

4. The cam detection fixture according to claim 3, characterized in that: The drive mechanism includes an electric telescopic rod (10) mounted on the base (1) and a transmission block fixedly connected to the bottom surface of the slide plate. The telescopic end of the electric telescopic rod (10) is connected to the transmission block.

5. A cam detection fixture according to claim 4, characterized in that: The guide rail (4) consists of two rails. Slider (11) is fixedly connected to both sides of the bottom surface of the slide plate (5). The bottom surface of the slider (11) is provided with a sliding groove, and it is slidably connected to the guide rail (4) through the sliding groove.

Images