Rotary arm spherical hinge press-fitting device

Abstract

The utility model discloses a rotating arm spherical hinge press-fitting device which comprises a press-fitting base and a pressing cylinder and further comprises a seat plate, a front guide column, a rear guide column and a positioning pressing plate. The front guide column and the rear guide column are installed at the left end of the seat plate, and the two guide columns are sleeved with the positioning pressing plate through guide holes. The press-fitting base is placed on the seat plate on the right sides of the front and rear guide columns, and a mandrel hole for accommodating a mandrel at the lower end of the spherical hinge is formed in the middle; the positioning pressing plate is located above the press-fitting base and can slide up and down along the guide columns, and a positioning mandrel hole with the inner shape face matched with the outer shape face of a mandrel at the upper end of the spherical hinge is formed in the middle of the positioning pressing plate. During application, the periphery of the lower end of the arm sleeve of the rotating arm is pressed on the periphery of the press-fitting base, the lower end of the outer sleeve of the spherical hinge is arranged in an orifice of the arm sleeve of the rotating arm, the mandrel at the upper end of the spherical hinge is inserted into the positioning mandrel hole, the lower bottom face of the positioning pressing plate is pressed on the upper end face of the outer sleeve of the spherical hinge, and the pressing cylinder presses the positioning pressing plate downwards. The fixture has the advantages that accurate clamping can be realized; the rate of graded products can be improved; and smooth press fitting can be realized.

Description

Technical Field

[0001] The utility model relates to a rotating arm ball joint press-fitting device, belonging to the technical field of ball joint press-fitting. 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] At present, with the rapid development of rail transit, the demand for the above-mentioned torsion arm is gradually increasing. The press-fitting of traditional ball joints generally adopts a base positioning device for press-fitting, that is, a vertical positioning mandrel hole is provided on the base, and the shape of the mandrel hole is consistent with the cross-section of the mandrel. During clamping, the positioning mandrel hole on the base is blocked by the ball joint, and the gap between the mandrel and the inner wall of the positioning mandrel hole is extremely small, which makes it difficult for the mandrel at the lower end of the ball joint to be accurately inserted into the positioning mandrel hole. If the aperture of the positioning mandrel hole is enlarged, the mandrel will rotate to a large extent, resulting in an increase in the press-fitting deflection error, resulting in unqualified products.

[0004] Traditionally, the pressing of ball joints is mostly done by using a press head to apply downward pressure to the upper edge of the ball joint sleeve through a press cylinder. Since a certain degree of deflection is inevitable when the lower end of the ball joint is manually placed into the torsion arm sleeve, it is easy to cause the pressing to be not smooth. Utility Model Content

[0005] The technical problem to be solved by the utility model is: how to achieve fast clamping while ensuring accurate clamping.

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

[0007] A swivel arm ball joint press-fitting device comprises a press-fitting base and a press cylinder, and also comprises a base plate, two front and rear guide columns installed at the left end of the base plate, and a positioning press plate sleeved on the two guide columns through guide holes; the press-fitting base is placed on the base plate on the right side of the two front and rear guide columns, and has a core shaft hole in the middle for accommodating the core shaft of the lower end of the ball joint; the positioning press plate is located above the press-fitting base and can slide up and down along the guide columns, and has a positioning core shaft hole in the middle whose inner surface matches the outer surface of the core shaft of the upper end of the ball joint; when in use, the outer periphery of the lower end of the arm sleeve of the swivel arm is pressed against the periphery of the press-fitting base, the lower end of the outer sleeve of the ball joint is placed in the orifice of the arm sleeve of the swivel arm, the core shaft of the upper end of the ball joint is inserted into the positioning core shaft hole, the lower bottom surface of the positioning press plate is pressed against the upper end surface of the outer sleeve of the ball joint, and the positioning press plate is pressed downward by the press cylinder.

[0008] The swing arm ball joint press-fit device also includes a cushion seat placed at the right end of the seat plate for supporting the installation end of the swing arm.

[0009] The lower bottom surface of the positioning pressure plate is provided with a pressure ring corresponding to the outer sleeve of the ball joint. When in use, the pressure ring is pressed on the upper end surface of the outer sleeve of the ball joint.

[0010] A positioning disk is arranged inside the pressure ring, and the positioning mandrel hole is located at the center of the positioning disk.

[0011] The positioning pressure plate is square, and each of its four corners has a guide hole. The distance between two adjacent guide holes is equal to the distance between two guide columns. When the direction of the positioning core shaft hole needs to be rotated, it can be achieved by switching the two adjacent guide holes inserted by the two guide columns.

[0012] The press-fit base includes an outer sleeve support body, an inner sleeve positioning body and a spring. The upper part of the inner wall of the inner sleeve positioning body has an annular top wall, and the center of the annular top wall is a core shaft hole. The inner sleeve positioning body is sleeved in the outer sleeve support body, and the spring is placed in the inner sleeve positioning body, with the upper end against the annular top wall and the lower end pressed on the seat plate, so as to push the upper section of the inner sleeve positioning body upward out of the upper end part of the outer sleeve support body. When used, the annular upper end surface of the outer sleeve support body is used to support the outer peripheral end surface of the lower end of the arm sleeve of the rotating arm, and the upper section of the inner sleeve positioning body is used to be sleeved in the sleeve hole of the arm sleeve to position the arm sleeve. When the ball joint is pressed into the sleeve hole of the arm sleeve, the inner sleeve positioning body can be compressed downward into the outer sleeve support body. Beneficial Effects

[0013] 1. Capable of precise clamping;

[0014] 2. Can improve the authenticity rate;

[0015] 3. Can be pressed smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional schematic diagram of the swing arm ball joint press-fitting device;

[0017] Figure 2 is a three-dimensional schematic diagram of the positioning pressure plate, mainly showing the pressure ring at the bottom;

[0018] Figure 3 It is a three-dimensional schematic diagram of some components of the swing arm ball joint press-fit device;

[0019] Figure 4 It is a three-dimensional schematic diagram of the rotating arm being placed on the press-fitting device, and the figure mainly shows the rotating arm;

[0020] Figure 5 It is a three-dimensional schematic diagram of the rotating arm being placed on the press-fitting device to complete the upper clamping.

[0021] In the figure: 1. seat plate; 2. press-fit base; 201. outer sleeve support body; 202. inner sleeve positioning body; 203. annular top wall; 2031. core shaft hole; 204. spring; 3. cushion seat; 4. pressure cylinder; 5. positioning pressure plate; 501. guide hole; 502. pressure ring; 503. positioning disk; 5031. positioning core shaft hole; 6. guide column; 7. ball joint; 701. outer sleeve; 702. core shaft; 8. swivel arm; 801. arm sleeve; 802. mounting end. DETAILED DESCRIPTION

[0022] The utility model is further described below in conjunction with the accompanying drawings:

[0023] like Figure 1 , 5 As shown, a swivel arm ball joint press-fitting device comprises a press-fitting base 2, a press cylinder 4, a base plate 1, two front and rear guide columns 6 installed at the left end of the base plate 1, and a positioning press plate 5 sleeved on the two guide columns 6 through guide holes 501; the press-fitting base 2 is placed on the base plate 1 on the right side of the two front and rear guide columns 6, and has a core shaft hole 2031 in the middle for accommodating the core shaft 702 at the lower end of the ball joint; the positioning press plate 5 is located above the press-fitting base 2 and can slide up and down along the guide column, and has a The inner surface of the positioning core shaft hole 5031 matches the outer surface of the core shaft 702 at the upper end of the ball joint; when in use, the outer periphery of the lower end of the arm sleeve 801 of the rotating arm is pressed against the periphery of the press-fit base 2, the lower end of the outer sleeve 701 of the ball joint 7 is placed in the hole of the arm sleeve 801 of the rotating arm, the core shaft 702 at the upper end of the ball joint 7 is inserted into the positioning core shaft hole 5031, the lower bottom surface of the positioning pressure plate 5 is pressed against the upper end surface of the outer sleeve 701 of the ball joint, and the positioning pressure plate 5 is pressed downward by the pressing cylinder 4. In this way, since the positioning mandrel hole 5031 for positioning the mandrel 702 is arranged at the top, when clamping, it is possible to clearly see whether the mandrel 702 at the upper end of the ball joint 7 is aligned with the positioning mandrel hole 5031 of the positioning pressure plate 5. By rotating the placement angle of the ball joint 7, the mandrel 702 can be easily inserted into the positioning mandrel hole 5031. When the mandrel 702 is inserted into the positioning mandrel hole 5031, it indicates that the angle at which the ball joint 7 is pressed into the sleeve hole of the rotating arm 8 is closest to the standard value, and it can be confirmed by testing after the press-fitting is completed. Since it is possible to clearly observe whether the mandrel 702 is aligned with the positioning mandrel hole 5031 of the positioning pressure plate 5, there is no need to expand the matching clearance between the positioning mandrel hole 5031 and the mandrel 702, so the press-fitting progress can be guaranteed and the authenticity rate can be improved. Since when the pressure cylinder 4 presses down the positioning pressure plate 5, the positioning pressure plate slides downward and is constrained by the guide column, the ball joint 7 can always remain stable during the pressing process, making the press-fitting process smooth.

[0024] It should be noted here that the “right side” mentioned in this article is limited to the viewing orientation of this application.

[0025] The cross-sections of the two ends of the mandrel described in the present application are D-shaped, and the corresponding positioning mandrel hole 5031 is also a D-shaped hole. In actual applications, the cross-sections of the two ends of the mandrel can also be rectangular, and the corresponding positioning mandrel hole 5031 is also a rectangular hole.

[0026] It also includes a cushion seat 3 placed at the right end of the seat plate 1 for supporting the mounting end 802 of the rotating arm 8.

[0027] like Figure 2 As shown, the bottom surface of the positioning plate 5 is provided with a pressing ring 502 corresponding to the outer sleeve 701 of the ball joint 7. When in use, the pressing ring 502 is pressed on the upper end surface of the outer sleeve 701 of the ball joint. In this way, it can be more suitable for whether the two end surfaces of the outer sleeve 701 of the ball joint have a certain amount of convexity or indentation.

[0028] A positioning disk 503 is disposed inside the pressure ring 502 , and the positioning spindle hole 5031 is located at the center of the positioning disk 503 .

[0029] The positioning plate 5 is square, and each of its four corners has a guide hole 501. The distance between two adjacent guide holes 501 is equal to the distance between two guide columns 6. When the direction of the positioning mandrel hole 5031 needs to be rotated, it can be achieved by switching the two adjacent guide holes 501 inserted by the two guide columns 6.

[0030] like Figure 3 , 4 As shown, the press-fit base 2 includes an outer sleeve support body 201, an inner sleeve positioning body 202 and a spring 204. The inner sleeve positioning body 202 has an annular top wall 203 on the upper inner wall, and the center of the annular top wall 203 is a core shaft hole 2031. The inner sleeve positioning body 202 is sleeved in the outer sleeve support body 201. The spring 204 is placed in the inner sleeve positioning body 202, with the upper end against the annular top wall 203 and the lower end pressed on the seat plate 1, so that the upper section of the inner sleeve positioning body 202 can be The upper end of the outer sleeve support body 201 is pushed upward. When in use, the annular upper end surface of the outer sleeve support body 201 is used to support the outer peripheral end surface of the lower end of the arm sleeve 801 of the rotating arm. The upper section of the inner sleeve positioning body 202 is used to be sleeved in the sleeve hole of the arm sleeve 801 to position the arm sleeve 801. When the ball joint 7 is pressed into the sleeve hole of the arm sleeve 801, the inner sleeve positioning body 202 can be compressed downward into the outer sleeve support body 201 to ensure the smooth completion of the press-fitting.

[0031] 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 swivel arm ball joint press-fitting device, comprising a press-fitting base (2) and a press cylinder (4), characterized in that: The press-fit base (2) is placed on the right side of the two front and rear guide columns (6), and has a core shaft hole (2031) in the middle for accommodating the core shaft (702) at the lower end of the ball joint; the press-fit base (2) is located above the press-fit base (2) and can slide up and down along the guide columns, and has an inner surface in the middle for contacting with the core shaft (702) at the upper end of the ball joint. The outer surface of the shaft (702) matches the positioning core shaft hole (5031); when in use, the outer periphery of the lower end of the arm sleeve (801) of the rotating arm is pressed against the periphery of the press-fit base (2), the lower end of the outer sleeve (701) of the ball joint (7) is placed in the hole of the arm sleeve (801) of the rotating arm, the core shaft (702) at the upper end of the ball joint (7) is inserted into the positioning core shaft hole (5031), the lower bottom surface of the positioning pressure plate (5) is pressed against the upper end surface of the outer sleeve (701) of the ball joint, and the positioning pressure plate (5) is pressed downward by the pressing cylinder (4).

2. The swivel arm ball hinge press-fit device according to claim 1, characterized in that: It also includes a cushion seat (3) placed at the right end of the seat plate (1) for supporting the mounting end (802) of the rotating arm (8).

3. The swivel arm ball hinge press-fit device according to claim 1, characterized in that: The bottom surface of the positioning pressure plate (5) is provided with a pressure ring (502) corresponding to the outer sleeve (701) of the ball joint (7). When in use, the pressure ring (502) is pressed on the upper end surface of the outer sleeve (701) of the ball joint.

4. The swivel arm ball hinge press-fit device according to claim 3, characterized in that: A positioning disk (503) is provided inside the pressure ring (502), and the positioning spindle hole (5031) is located at the center of the positioning disk (503).

5. The swivel arm ball hinge press-fit device according to any one of claims 1 to 4, characterized in that: The positioning pressure plate (5) is square, and each of the four corners thereof has a guide hole (501). The distance between two adjacent guide holes (501) is equal to the distance between two guide pillars (6). When the direction of the positioning mandrel hole (5031) needs to be rotated, this can be achieved by switching between two adjacent guide holes (501) to be inserted by the two guide pillars (6).

6. The swivel arm ball hinge press-fit device according to any one of claims 1 to 4, characterized in that: The press-fit base (2) comprises an outer sleeve support body (201), an inner sleeve positioning body (202) and a spring (204); the inner sleeve positioning body (202) has an annular top wall (203) on its inner wall upper portion, the annular top wall (203) having a core shaft hole (2031) at its center; the inner sleeve positioning body (202) is sleeved in the outer sleeve support body (201); the spring (204) is placed in the inner sleeve positioning body (202), with its upper end supporting the annular top wall (203) and its lower end pressing on the seat plate (1), so as to be able to press The upper section of the inner sleeve positioning body (202) pushes upwards out of the upper end of the outer sleeve support body (201); when in use, the annular upper end surface of the outer sleeve support body (201) is used to support the outer peripheral end surface of the lower end of the arm sleeve (801) of the rotating arm; the upper section of the inner sleeve positioning body (202) is used to be sleeved in the sleeve hole of the arm sleeve (801) to position the arm sleeve (801); when the ball joint (7) is pressed into the sleeve hole of the arm sleeve (801), the inner sleeve positioning body (202) can be compressed downwards into the outer sleeve support body (201).

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