Clamp for drilling center hole in claw pole of automobile generator

Abstract

The utility model discloses a clamp for drilling center holes of claw poles of an automobile generator, which comprises a seat body and a gland, the gland is rotatably connected with the seat body through a rotating shaft, a spring abutting against the seat body and the gland is sleeved on the rotating shaft, a plurality of claw grooves for placing the claw poles are arranged on the seat body, and a first bolt in threaded connection with the seat body is arranged on the gland. And through holes for the drill bit to pass through are formed in the seat body and the gland. According to the clamp, the claw part of the claw pole can be clamped into the claw groove of the clamp by utilizing the structural characteristics of the claw pole, and the flat part of the claw pole is pressed by virtue of the gland, so that on one hand, the damage to the claw pole is avoided, and on the other hand, the surface-to-surface contact pressing is more stable, and the drilling work can be carried out when the clamp is clamped by a chuck of a machine tool; in addition, the clamp is not only suitable for clamping a chuck of a machine tool, but also can be directly installed on a vertical drilling machine, and is suitable for various existing drilling devices.

Description

Technical Field

[0001] The utility model relates to the technical field of claw pole jigs, in particular to a jig for drilling center holes of claw poles of automotive generators. Background Art

[0002] The claw pole is one of the main components in an automotive generator. Currently, the processing methods of the claw pole are as follows: blanking, heating, upsetting, pre-forging, precision forging, trimming, magnetic annealing, cold sizing, and finish machining. In the finish machining, it is necessary to drill a center hole in the forged claw pole. Usually, the drilling work is to install the claw pole in the chuck of the machine tool and then start drilling with a drill bit.

[0003] In the above drilling operation, the chuck clamps six or eight claw parts of the claw pole for fixation. Since the wall thickness of the claw parts is generally not large, the acting force of the chuck may cause deformation or indentation of the claw parts, resulting in damage to the claw pole, which is not conducive to the finish machining of the claw pole. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a jig for drilling center holes of claw poles of automotive generators, so as to solve the problem that the existing machine tool chuck will cause deformation or indentation of the claw parts during clamping, resulting in damage to the claw pole and being not conducive to the finish machining of the claw pole.

[0005] To solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A jig for drilling center holes of claw poles of automotive generators includes a base body and a pressing cover. The pressing cover is rotatably connected to the base body through a rotating shaft. A spring that abuts against the base body and the pressing cover is sleeved on the rotating shaft. The base body is provided with a plurality of claw grooves for placing claw poles. The pressing cover is provided with a first bolt that is threadedly connected to the base body. Through holes for the drill bit to pass through are provided on both the base body and the pressing cover.

[0007] A further technical solution is: A positioning pin is installed on the base body, and a groove adapted to the positioning pin is provided on the outer edge of the pressing cover.

[0008] A further technical solution is: The through hole on the base body is in an inverted conical shape.

[0009] A further technical solution is: The base body is installed on the drilling equipment through a second bolt.

[0010] A further technical solution is: An anti-disengagement block is provided at the top of the rotating shaft.

[0011] A further technical solution is: The rotating shaft is away from the centers of the base body and the pressing cover.

[0012] Compared with the prior art, the utility model can achieve at least one of the following beneficial effects:

[0013] The utility model provides a fixture for drilling a center hole of an automotive generator claw pole. The fixture can utilize the structural characteristics of the claw pole itself, clamp the claw part of the claw pole into the claw groove of the fixture, and press the flat part of the claw pole with the aid of a gland. Firstly, this fixture can avoid damaging the claw pole. Secondly, the surface-to-surface contact and pressing are more stable. The fixture can be clamped by the chuck of a machine tool to carry out the drilling work. In addition, this fixture is not only suitable for clamping by the chuck of a machine tool, but also can be directly installed on a vertical drilling machine and is applicable to various existing drilling equipment. Brief Description of the Drawings

[0014] Figure 1 It is a schematic structural diagram of a fixture for drilling a center hole of an automotive generator claw pole according to the utility model.

[0015] Figure 2 According to the utility model Figure 1 A schematic structural diagram from the front view perspective.

[0016] Figure 3 According to the utility model Figure 1 A schematic structural diagram of the middle seat body.

[0017] Figure 4 It is a schematic structural diagram of a claw pole in the prior art.

[0018] Reference numerals: 1, seat body; 2, gland; 3, rotating shaft; 4, spring; 5, claw pole; 6, claw groove; 7, first bolt; 8, through hole; 9, positioning pin; 10, groove; 11, second bolt; 12, anti-detachment block. Detailed Embodiments

[0019] To make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all of the embodiments. Usually, the components of the embodiments of the utility model described and shown in the accompanying drawings here can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents the selected embodiments of the utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the utility model without creative efforts fall within the scope of protection of the utility model.

[0021] It should be noted that, without conflict, the embodiments in the utility model and the features in the embodiments can be combined with each other.

[0022] It should be noted that like reference numerals and letters indicate like items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is usually placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0025] Embodiment 1:

[0026] As shown in this embodiment Figure 1 、 Figure 2 、 Figure 3 and Figure 4 A fixture for drilling center holes of claw poles of an automotive generator includes a base body 1 and a gland 2. The gland 2 is rotatably connected to the base body 1 through a rotating shaft 3. A spring 4 that abuts against the base body 1 and the gland 2 is sleeved on the rotating shaft 3. The base body 1 is provided with a plurality of claw grooves 6 for placing claw poles 5. The gland 2 is provided with a first bolt 7 that is threadedly connected to the base body 1. Through holes 8 for the drill bit to pass through are provided on both the base body 1 and the gland 2.

[0027] First, install the seat body 1 on the chuck of a conventional machine tool or the working platform of a vertical machine tool. Then, rotate the gland 2 by a certain angle, generally 180°, to stagger the gland 2 from the seat body 1, which facilitates the insertion of the claw part of the claw pole 5 into the claw groove 6 of the seat body 1. Next, rotate the gland 2 in the reverse direction by the same angle so that the gland 2 faces the seat body 1. Finally, use the first bolt 7 to tighten the gland 2 to the seat body 1, that is, the gland 2 firmly fixes the claw pole 5, which is convenient for subsequent drilling. This fixture can, firstly, avoid damaging the claw pole 5, and secondly, the gland 2 presses on the flat part of the claw pole 5, and the surface-to-surface contact and pressing are more stable. In addition, this fixture is applicable to a variety of existing drilling equipment.

[0028] Embodiment 2:

[0029] Based on the above embodiment, this embodiment shows that a positioning pin 9 is installed on the seat body 1, and a groove 10 adapted to the positioning pin 9 is provided on the outer edge of the gland 2.

[0030] When rotating the gland 2, the positioning pin 9 and the groove 10 cooperate with each other to prevent the gland 2 from over-rotating and causing position deviation, which facilitates the gland 2 to rotate in place and is conducive to the first bolt 7 screwing into the threaded hole on the seat body 1.

[0031] Preferably, the through hole 8 on the seat body 1 is inverted conical.

[0032] It is convenient for the waste chips to be discharged when the claw pole 5 drills the center hole and will not remain in the inverted conical through hole 8 on the seat body 1.

[0033] Preferably, the seat body 1 is installed on the drilling equipment through the second bolt 11.

[0034] When the rest of the drilling equipment at the processing site is idle, such as a vertical drilling machine, the fixture can also be installed on the vertical drilling machine using the second bolt 11 to improve the equipment utilization rate.

[0035] Preferably, an anti-disengagement block 12 is provided at the top of the rotating shaft 3.

[0036] Prevent the gland 2 from detaching from the rotating shaft 3.

[0037] Preferably, the rotating shaft 3 is away from the center of the circle of the seat body 1 and the gland 2.

[0038] When the gland 2 rotates, a larger installation space can be left for the claw pole 5.

[0039] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A clamp for drilling center holes of claw poles of automobile generators, characterized in that: The invention comprises a seat body (1) and a pressure cover (2), wherein the pressure cover (2) is rotatably connected to the seat body (1) via a rotating shaft (3), a spring (4) is mounted on the rotating shaft (3) to resist the seat body (1) and the pressure cover (2), the seat body (1) is provided with a plurality of claw grooves (6) for accommodating claw poles (5), the pressure cover (2) is provided with a first bolt (7) threadedly connected to the seat body (1), and the seat body (1) and the pressure cover (2) are both provided with a through hole (8) for a drill to pass through.

2. The clamp for drilling center holes of claw poles of automobile generators according to claim 1, characterized in that: A positioning pin (9) is mounted on the seat body (1), and a groove (10) matching the positioning pin (9) is arranged on the outer edge of the pressure cover (2).

3. The clamp for drilling center holes of claw poles of automobile generators according to claim 1, characterized in that: The through hole (8) on the seat body (1) is in an inverted cone shape.

4. The clamp for drilling center holes of claw poles of automobile generators according to claim 1, characterized in that: The seat body (1) is mounted on the drilling equipment via a second bolt (11).

5. The clamp for drilling center holes of claw poles of automobile generators according to claim 1, characterized in that: An anti-drop block (12) is provided on the top of the rotating shaft (3).

6. The clamp for drilling center holes of claw poles of automobile generators according to claim 1, characterized in that: The rotating shaft (3) is away from the center of the seat body (1) and the gland (2).

Images