Clamp matched with numerical control rotary table and used for drilling cambered surface hole in brake shoe

Abstract

The utility model relates to the field of brake shoe cambered surface hole drilling clamps, in particular to a brake shoe cambered surface hole drilling clamp matched with a numerical control rotary table, which comprises a numerical control rotary table, a double-end bolt and a clamp body, the outer surface of the numerical control rotary table is fixedly connected with positioning keys II arranged at equal intervals, and the outer surface of the double-end bolt is sleeved with a movable straight pressing plate; an opening spherical gasket is installed on the outer surface of the double-end bolt, the outer surface of the double-end bolt is in threaded connection with a spherical shoulder hexagon nut, positioning is facilitated by arranging a rhombic positioning pin and a circular positioning pin, a locking structure is arranged, it can be guaranteed that on a machining center, high-precision indexing and precise positioning and locking are achieved through a numerical control rotary table, and the machining precision is improved. The multi-hole-site and multi-specification hole in the cambered surface of the brake shoe is subjected to indexing and numerical control machining, the machining size and position precision of the brake shoe hole can be greatly improved, two brake shoes can be clamped at a time, and the process machining capacity is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of brake shoe arc-hole drilling fixtures, and particularly relates to a brake shoe arc-hole drilling fixture which is matched with a numerical control turntable. Background Technique

[0002] The drum brake is a commonly used automotive braking component. Especially in commercial vehicles, it is an actuator for decelerating or stopping the whole vehicle. The brake shoe is a main part of the drum brake. It is riveted to the friction plate to provide support for the friction plate. When the brake works, the friction plate clings to the brake drum to generate frictional force, so as to achieve the purpose of decelerating or stopping the whole vehicle. The brake shoe is required to have good strength and rigidity.

[0003] During the processing of the brake shoe, operations such as turning the end face, boring large and small holes, and drilling arc-shaped multi-holes need to be carried out in sequence. Among them, in the process of drilling arc-shaped multi-holes, holes at multiple different positions and of different sizes on the arc surface of the brake shoe need to be processed to the designed accuracy requirements.

[0004] However, the existing processing method for arc-shaped multi-holes is that the operator uses a manual turntable fixture on a radial drill press for indexing drilling. Each time, only one part is clamped, and the fixture needs to be rotated by one indexing for drilling a hole at one position. The operation is cumbersome, the work efficiency is low, the labor intensity of the staff is large, and the machining accuracy of the parts is low.

[0005] Therefore, a new solution needs to be proposed to solve this problem. Content of the Utility Model

[0006] Aiming at the deficiencies and defects in the prior art in the above background technology, that is, it is difficult to ensure high-precision consistency in the processing of arc-shaped multi-holes of brake shoes, the production efficiency is low, and the labor intensity is large.

[0007] A brake shoe arc-hole drilling fixture which is matched with a numerical control turntable disclosed by the utility model comprises a numerical control turntable, a double-headed bolt and a fixture body. The outer surface of the numerical control turntable is fixedly connected with positioning keys II arranged at equal distances. A moving straight pressing plate is sleeved on the outer surface of the double-headed bolt. An opening spherical gasket is installed on the outer surface of the double-headed bolt. A spherical shoulder hexagon nut is threadedly connected to the outer surface of the double-headed bolt. Two circular positioning pins and two diamond-shaped positioning pins are fixedly installed on the front surface of the fixture body. Equal-distance arranged connecting screws are fixedly connected to the inner walls of each circular positioning pin and diamond-shaped positioning pin. The inner walls of each connecting screw are fixedly connected to the inner wall of the fixture body.

[0008] Further, a hexagonal flat nut is threadedly connected to the outer surface of the double-headed bolt, and a positioning shaft is fixedly installed on the outer surface of the double-headed bolt.

[0009] Further, the inner wall of the positioning shaft is fixedly connected with hexagon socket head cap screws I arranged at equal distances, and the outer surface of each hexagon socket head cap screw I is fixedly connected with the inner wall of the fixture body.

[0010] Further, the front surface of the fixture body is provided with arc-shaped supporting plates arranged at equal distances, and the outer surface of the fixture body is provided with tool setting holes arranged at equal distances.

[0011] Further, the inner wall of each arc-shaped supporting plate is fixedly connected with two hexagon socket head cap screws II, and the outer surface of each hexagon socket head cap screw II is fixedly connected with the inner wall of the fixture body.

[0012] Further, two positioning keys I are installed on the front surface of the fixture body, and an opening screw is fixedly connected to the inner wall of each positioning key I.

[0013] Further, T-shaped bolts arranged at equal distances are provided on the inner wall of the CNC rotary table, the outer surface of each T-shaped bolt is in sliding contact with the inner wall of the fixture body, and a pre-tightening hexagon nut is threadedly connected to the outer surface of each T-shaped bolt.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] 1. By providing components such as a diamond locating pin, a round locating pin, a movable straight pressing plate, an opening spherical gasket, and a ball shoulder hexagon nut, the present utility model is convenient for positioning by setting the diamond locating pin and the round locating pin, and a locking structure is provided, which can ensure that the device is highly accurately indexed and precisely positioned and locked on the machining center, and the arc surface of the brake shoe with multiple holes and multiple specifications is indexed and numerically controlled, which can greatly improve the dimensional and positional accuracy of the brake shoe hole machining, and two brake shoe pieces can be clamped at one time, greatly improving the process machining ability.

[0016] 2. The present utility model adopts numerical control for multiple actions such as indexing, positioning, and displacement, which not only improves the machining accuracy, but also greatly improves the machining efficiency, and at the same time greatly reduces the labor intensity of the staff. The fixture for machining the arc holes of the brake shoe by using the present utility model has the advantages of quick and convenient clamping, high and stable machining accuracy, and high production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present application, and constitute a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings:

[0018] Figure 1 is a schematic three-dimensional structure diagram of the whole of the present utility model;

[0019] Figure 2 For the present utility model Figure 1 Schematic diagram of the A-A structure in it;

[0020] Figure 3 For the present utility model Figure 1 Schematic diagram of the B-B structure in it;

[0021] Figure 4 Schematic diagram of the circular locating pin structure of the present utility model;

[0022] Figure 5 For the present utility model Figure 1 Schematic diagram of the C-C structure in it;

[0023] Figure 6 For the present utility model Figure 1 Schematic diagram of the D-D structure in it;

[0024] Figure 7 Schematic diagram of the tool setting hole structure of the present utility model.

[0025] In the figure: 1. CNC turntable; 2. Diamond locating pin; 3. Connecting screw; 4. Circular locating pin; 5. Locating shaft; 6. Hexagon socket head cap screw one; 7. Jig body; 8. Arc-shaped support plate; 9. Hexagon socket head cap screw two; 10. Double-end bolt; 11. Hexagon flat nut; 12. Moving straight pressure plate; 13. Open spherical gasket; 14. Ball shoulder hexagon nut; 15. Locating key one; 16. Open screw; 17. T-bolt; 18. Pre-tightening hexagon nut; 19. Tool setting hole; 20. Locating key two. Specific embodiments

[0026] The following will disclose multiple embodiments of the present utility model in the form of drawings. For the sake of clarity, many physical details will be described together in the following narrative. However, it should be understood that these physical details are not used to limit the present utility model. That is to say, in some embodiments of the present utility model, these physical details are not necessary. In addition, for the sake of simplifying the drawings, some conventional structures and components will be shown in a simple schematic manner in the drawings.

[0027] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , a fixture for drilling arc-shaped holes on brake shoes, which is used in conjunction with a CNC turntable of the present utility model, includes a CNC turntable 1, a double-end bolt 10 and a jig body 7. The outer surface of the CNC turntable 1 is fixedly connected with equally spaced locating keys two 20. Setting two locating keys two 20 facilitates the connection between the CNC turntable 1 and the machining center, and realizes the real-time and precise indexing of parts during the machining process through the CNC system.

[0028] In this embodiment, a movable straight pressing plate 12 is sleeved on the outer surface of the stud bolt 10. The movable straight pressing plate 12 is installed on the surface of the stud bolt 10 and can be moved away when loading and unloading parts. The clamping part can be clamped through the movable straight pressing plate 12. An opening spherical gasket 13 is installed on the outer surface of the stud bolt 10. After the part is loaded into the fixture, the movable straight pressing plate 12 is then installed, and then it is pressed through the opening spherical gasket 13 and the spherical shoulder hexagon nut 14. The mating part of the opening washer and the shoulder nut adopts a spherical structure, and its main function is to adapt to the dimensional variation of the blanks at the pressing parts of the two parts, so as to better meet the processing requirements of the fixture.

[0029] Combined with Figure 1 and Figure 3 , Figure 4 On the front surface of the fixture body 7, two circular locating pins 4 and two diamond locating pins 2 are fixedly installed. The two circular locating pins 4 and the two diamond locating pins 2 are respectively installed on the front surface of the fixture body 7 and are positioned on the fixture body 7 by an interference fit method. The inner walls of each circular locating pin 4 and diamond locating pin 2 are fixedly connected with equally spaced connecting screws 3, and the inner walls of each connecting screw 3 are fixedly connected with the inner wall of the fixture body 7, and are fastened with the connecting screws 3 to ensure reliable installation.

[0030] In this embodiment, a hexagon flat nut 11 is threadedly connected to the outer surface of the stud bolt 10. It is convenient to install the stud bolt 10 through the hexagon flat nut 11. A positioning shaft 5 is fixedly installed on the outer surface of the stud bolt 10, and the positioning shaft 5 is connected to the stud bolt 10.

[0031] Combined with Figure 1 and Figure 2 , equally spaced socket head cap screws one 6 are fixedly connected to the inner wall of the positioning shaft 5. The socket head cap screws one 6 are installed on the inner wall of the positioning shaft 5 to realize the positioning installation of the socket head cap screws one 6. The outer surface of each socket head cap screw one 6 is fixedly connected with the inner wall of the fixture body 7, and the fixture body 7 is connected to the socket head cap screws one 6 to realize the installation effect of the positioning shaft 5.

[0032] In a preferred embodiment, equally spaced arc-shaped support plates 8 are provided on the front surface of the fixture body 7. The arc-shaped support plates 8 are provided on the front surface of the fixture body 7. Equally spaced tool setting holes 19 are opened on the outer surface of the fixture body 7. The tool setting holes 19 are opened on the surface of the fixture body 7, so that the fixture and the tool can quickly establish a connection, reducing the number and time of tool setting pre-processing and greatly improving the production efficiency.

[0033] In this embodiment, two hexagon socket head cap screws II 9 are fixedly connected to the inner wall of each arc-shaped support plate 8. The hexagon socket head cap screws II 9 are installed on the inner wall of the corresponding arc-shaped support plate 8 to achieve the positioning of the hexagon socket head cap screws II 9. The outer surface of each hexagon socket head cap screw II 9 is fixedly connected to the inner wall of the fixture body 7. The hexagon socket head cap screws II 9 are connected to the fixture body 7 to achieve the installation of the arc-shaped support plate 8.

[0034] In a preferred embodiment, two positioning keys I 15 are installed on the front surface of the fixture body 7. The positioning keys I 15 are installed on the front surface of the fixture body 7. An opening screw 16 is fixedly connected to the inner wall of each positioning key I 15. By connecting through the opening screw 16, the rotational freedom of the fixture on the CNC rotary table 1 can be limited through the cooperation between the positioning key I 15 and the T-slot on the CNC rotary table 1.

[0035] In this embodiment, T-bolts 17 are arranged at equal distances on the inner wall of the CNC rotary table 1. The T-bolts 17 are installed on the inner wall of the CNC rotary table 1. The outer surface of each T-bolt 17 is in sliding contact with the inner wall of the fixture body 7. A pre-tightening hexagon nut 18 is threadedly connected to the outer surface of each T-bolt 17. The fixture and the CNC rotary table 1 are connected through the T-bolts 17 and the pre-tightening hexagon nuts 18 to fasten the fixture on the CNC rotary table 1.

[0036] The above are only the embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the scope of the claims of the present invention.

Claims

1. A fixture used for drilling a curved hole on a brake shoe in conjunction with a CNC turntable, comprising a CNC turntable (1), a stud bolt (10) and a fixture body (7), characterized in that: The outer surface of the CNC turntable (1) is fixedly connected with two equidistantly arranged positioning keys (20), the outer surface of the stud bolt (10) is sleeved with a movable straight pressure plate (12), the outer surface of the stud bolt (10) is installed with an open spherical gasket (13), the outer surface of the stud bolt (10) is threadedly connected with a spherical shouldered hexagonal nut (14), the front of the clamp body (7) is fixedly installed with two circular positioning pins (4) and two diamond positioning pins (2), the inner wall of each of the circular positioning pins (4) and the diamond positioning pin (2) is fixedly connected with an equidistantly arranged connecting screw (3), and the inner wall of each of the connecting screws (3) is fixedly connected to the inner wall of the clamp body (7).

2. The fixture for drilling arc holes of brake shoes in combination with a CNC turntable according to claim 1, characterized in that: The outer surface of the stud bolt (10) is threadedly connected with a hexagonal flat nut (11), and the outer surface of the stud bolt (10) is fixedly mounted with a positioning shaft (5).

3. The fixture for drilling a curved hole of a brake shoe in conjunction with a CNC turntable according to claim 2, characterized in that: The inner wall of the positioning shaft (5) is fixedly connected with cylindrical head hexagon socket screws (6) arranged at equal distances, and the outer surface of each cylindrical head hexagon socket screw (6) is fixedly connected to the inner wall of the clamp body (7).

4. The fixture for drilling a curved hole of a brake shoe in conjunction with a CNC rotary table according to claim 1, characterized in that: The front side of the clamp body (7) is provided with arc-shaped support plates (8) arranged at equal distances, and the outer surface of the clamp body (7) is provided with tool holes (19) arranged at equal distances.

5. The fixture for drilling a curved hole of a brake shoe in conjunction with a CNC rotary table according to claim 4, characterized in that: The inner wall of each arc-shaped support plate (8) is fixedly connected to two cylindrical head hexagon socket screws (9), and the outer surface of each cylindrical head hexagon socket screw (9) is fixedly connected to the inner wall of the clamp body (7).

6. The fixture for drilling a curved hole of a brake shoe in conjunction with a CNC rotary table according to claim 1, characterized in that: Two positioning keys (15) are installed on the front of the clamp body (7), and the inner wall of each positioning key (15) is fixedly connected with an open screw (16).

7. The fixture for drilling a curved hole of a brake shoe in conjunction with a CNC rotary table according to claim 1, characterized in that: The inner wall of the numerically controlled turntable (1) is provided with T-bolts (17) arranged at equal distances, the outer surface of each T-bolt (17) is in sliding contact with the inner wall of the clamp body (7), and the outer surface of each T-bolt (17) is threadedly connected with a pre-tightened hexagonal nut (18).

Images