Reference seat plate for measuring press-fitting angle of spherical hinge in rotating arm by using bevel protractor

Abstract

The utility model discloses a reference seat plate for measuring a press-fitting angle of a spherical hinge in a rotating arm by using a bevel protractor, which is a P-shaped plate formed by a rectangular reference attaching and pressing area and a strip-shaped bevel protractor sliding area, and the reference attaching and pressing area can be attached and pressed on a mounting surface of a mounting end of the rotating arm. The end, close to the mandrel, of the bevel protractor sliding area is a measuring end during measurement, a sliding groove extending to the measuring end is formed in the length direction of the bevel protractor sliding area, and a bottom edge block of a right-angle bevel protractor in the bevel protractor is located in the sliding groove and can slide in the sliding groove. The method has the advantages that a special detection platform is not needed, so that the acquisition cost is saved; the rotating arm does not need to be leveled during testing, operation is simplified, and detection efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a reference seat plate for measuring the pressing angle of a ball joint in a rotating arm by using an angle ruler, and belongs to the technical field of ball joint pressing detection. Background Art

[0002] A torsion arm used in rail transit, with a ball joint at one end and a mounting surface at the other end, the core shaft in the ball joint is generally a D-shaped shaft. The torsion arm has strict requirements on the installation angle of the ball joint, requiring the limit surface of the D-shaped shaft to be nearly parallel to the mounting surface, and the deflection error between the two shall not exceed ± (0.1-1°).

[0003] After the ball joint is press-fitted on the swing arm, the assembly angle of the ball joint must be tested. The test is based on the installation surface of the swing arm as the reference surface, and the D-shaped core shaft limit surface (plane) as the test surface. The deflection angle of the core shaft limit surface relative to the installation surface is required to be within the preset range. The traditional testing method is to use a dedicated testing platform, place the press-fitted swing arm on the testing platform, use support blocks to level the swing arm, and then use a dedicated inspection fixture to pad the angle ruler to a suitable height for testing.

[0004] From the above, it can be seen that the traditional detection method requires the use of a dedicated detection platform and requires a raised operation, which not only increases the purchase cost but is also more complicated to operate. Utility Model Content

[0005] The technical problem to be solved by the utility model is: how to implement angle detection on the ball joint in the rotating arm after press-fitting at low cost and high efficiency.

[0006] In view of the above problems, the technical solution proposed by the utility model is:

[0007] A reference base plate for measuring the press-fit angle of a ball joint in a rotating arm using an angle ruler is a P-shaped plate composed of a rectangular reference pressing area and a long strip of an angle ruler sliding area. The reference pressing area can be pressed against the mounting surface of the mounting end of the rotating arm. The end of the angle ruler sliding area close to the core shaft during measurement is the measuring end. A sliding groove extending to the measuring end is provided along the length direction of the angle ruler sliding area. The bottom edge block of the right-angle square in the angle ruler is located in the sliding groove and can slide in the sliding groove.

[0008] The bottom surface of the sliding groove is parallel to the bottom surface of the reference seat plate of the reference pressing area, and the bottom surface of the bottom edge block of the right angle square is in contact with the bottom surface of the sliding groove.

[0009] Limiting grooves are arranged on the side walls on both sides of the sliding groove, which are used to limit the limiting pins horizontally arranged on both sides of the bottom edge block of the right angle square.

[0010] Permanent magnetic blocks for firmly sucking the reference seat plate onto the mounting surface of the rotating arm mounting end are respectively arranged at both ends of the lower bottom surface of the reference pressing area. Beneficial Effects

[0011] 1. No need to use a dedicated testing platform, saving purchase costs;

[0012] 2. There is no need to level the rotating arm during testing, which simplifies the operation and improves the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A three-dimensional schematic diagram of the reference seat plate when performing detection;

[0014] Figure 2 is a three-dimensional schematic diagram of the angle ruler;

[0015] Figure 3 for Figure 1 A partial enlarged view of

[0016] Figure 4 It is a schematic diagram of the bottom surface of the reference seat plate.

[0017] In the figure: 1. reference seat plate; 101. reference pressing area; 102. angle ruler sliding area; 1021. sliding groove; 10211. groove bottom surface; 1022. limit groove; 2. permanent magnet block; 3. rotating arm; 301. mounting surface; 4. ball joint; 401. core shaft; 4011. limit surface; 5. angle ruler; 501. right-angle square; 5011. bottom edge block; 5012. limit pin; 502. base ruler. DETAILED DESCRIPTION

[0018] The utility model is further described below in conjunction with the accompanying drawings:

[0019] like Figure 1As shown in FIG. 3 , a reference base plate 1 for measuring the press-fit angle of the ball joint 4 in the rotating arm 3 by using an angle ruler is a P-shaped plate composed of a rectangular reference pressing area 101 and a long strip of angle ruler sliding area 102. The reference pressing area 101 can be pressed on the mounting surface of the mounting end of the rotating arm 3. The end of the angle ruler sliding area 102 close to the core shaft 401 during measurement is the measuring end. A sliding groove 1021 extending to the measuring end is provided along the length direction of the angle ruler sliding area 102. The bottom edge block 5011 of the right-angled square 501 in the angle ruler 5 is located in the sliding groove 1021 and can slide in the sliding groove 1021. When in use, the reference pressing area 101 of the reference seat plate 1 is pressed against the mounting surface of the mounting end of the rotating arm 3, and the angle ruler 5 is slid along the sliding groove 1021 to the measuring end near the core shaft 401, so that the bottom surface of the bottom edge block 5011 of the right angle ruler 501 is parallel to the surface of the reference seat plate 1, and then the bottom surface of the base ruler 502 of the angle ruler 5 is pressed against the limit surface 4011 of the core shaft 401, and then the reading on the angle ruler is read to obtain the size of the angle formed by the limit surface 4011 of the core shaft 401 and the mounting surface of the rotating arm 3. In this way, by setting a reference seat plate 1, the detection platform dedicated to the traditional method is replaced, which greatly reduces the purchase cost of the equipment. At the same time, by using the quasi-seat plate provided by the present application, the measurement can be carried out without leveling the rotating arm 3 during operation, making the detection operation very simple and efficient.

[0020] Furthermore, the bottom surface of the sliding groove 1021 is parallel to the bottom surface of the reference seat plate 1 of the reference pressing area 101, and the bottom surface of the bottom edge block 5011 of the right angle square 501 is in contact with the bottom surface 10211 of the sliding groove 1021. In this way, during the inspection, as long as the bottom surface of the bottom edge block 5011 of the right angle square 501 is in contact with the bottom surface 10211 of the sliding groove 1021, it can be ensured that the bottom surface of the bottom edge block 5011 of the right angle square 501 is parallel to the installation surface of the rotating arm.

[0021] Furthermore, limiting grooves 1022 are provided on the side walls on both sides of the sliding groove 1021, which are used to limit the limiting pins 5012 horizontally provided on both sides of the bottom edge block 5011 of the right angle ruler 501. In this way, the angle ruler can be installed in the sliding groove 1021, and further the bottom surface of the bottom edge block 5011 of the right angle ruler 501 is kept in contact with the bottom surface 10211 of the sliding groove 1021.

[0022] like Figure 4 As shown, permanent magnets 2 are provided at both ends of the bottom surface of the reference pressing area 101 for firmly attaching the reference base plate 1 to the mounting surface 301 of the mounting end of the rotating arm 3. In this way, when measuring, there is no need to press the reference pressing area 101 of the reference base plate 1 to the mounting surface 301 of the mounting end of the rotating arm 3 by hand.

[0023] The above embodiments are only used to more clearly describe the present invention and cannot be regarded as limiting the protection scope of the present invention. Any modifications in equivalent forms should be regarded as falling within the protection scope of the present invention.

Claims

1. A reference base plate for measuring the press-fit angle of a ball joint in a swing arm using an angle ruler, characterized in that: The P-shaped plate is composed of a rectangular reference pressing area (101) and a long strip angle ruler sliding area (102); the reference pressing area (101) can be pressed against the mounting surface of the mounting end of a rotating arm (3); the end of the angle ruler sliding area (102) close to the core shaft (401) during measurement is the measuring end; a sliding groove (1021) extending to the measuring end is provided along the length direction of the angle ruler sliding area (102); the bottom edge block (5011) of the right angle ruler (501) in the angle ruler (5) is located in the sliding groove (1021) and can slide in the sliding groove (1021).

2. The reference base plate for measuring the press-fit angle of the ball joint in the swing arm by using an angle ruler according to claim 1, characterized in that: The bottom surface of the sliding groove (1021) is parallel to the bottom surface of the reference seat plate of the reference pressing area (101), and the bottom surface of the bottom edge block (5011) of the right-angled square (501) is in contact with the bottom surface (10211) of the sliding groove (1021).

3. The reference base plate for measuring the press-fit angle of the ball joint in the swing arm by using an angle ruler according to claim 1 or 2, characterized in that: Limiting grooves (1022) are provided on the side walls on both sides of the sliding groove (1021) for limiting the limiting pins (5012) horizontally arranged on both sides of the bottom edge block (5011) of the right-angled ruler (501).

4. The reference base plate for measuring the press-fit angle of the ball joint in the swing arm by using an angle ruler according to claim 1 or 2, characterized in that: Permanent magnetic blocks (2) for firmly sucking the reference seat plate onto the mounting surface (301) of the mounting end of the rotating arm (3) are respectively provided at both ends of the lower bottom surface of the reference pressing area (101).

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