Clamping and positioning device for turning inner hole and end face of motor steel jacket

Abstract

The utility model discloses a clamping and positioning device for turning an inner hole and an end face of a motor steel jacket, which comprises a base, a multi-jaw chuck is arranged on the base, and a plurality of clamping jaws are arranged on the multi-jaw chuck; when the motor steel sleeve is sleeved on the plurality of clamping jaws, the plurality of clamping jaws can be matched to expand and supported on the inner circumferential surface of the motor steel sleeve; the base is further provided with a plurality of supporting plates which are annularly distributed with the multi-jaw chuck as the center. A telescopic radial auxiliary support and a telescopic axial auxiliary support are arranged at one end, far away from the base, of the supporting plate; when the clamping jaws are sleeved with the motor steel sleeve, the radial auxiliary supports can stretch out in the radial direction to tightly hold the peripheral face of the motor steel sleeve, and the axial auxiliary supports can stretch out in the axial direction to abut against the end face of the motor steel sleeve. The positioning and supporting device can be used for positioning and supporting when an inner hole and an end face of the motor steel sleeve are turned, and the motor steel sleeve is prevented from deforming before machining and rebounding after machining.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor steel cover processing technical field especially relates to a kind of clamping and positioning device of motor steel cover hole and end face in vehicle. BACKGROUND

[0002] In the motor steel cover mechanical processing of new energy automobile, since motor steel cover is integrally formed by steel plate, the thickness of most motor steel cover is about 4mm, which belongs to thin-walled part, the machining of its inner hole and end face of present motor steel cover is mainly by numerical control lathe, and outer circle positioning and clamping are commonly used;But since it is thin-walled part, deformation is easy to occur when clamping, and after machining, deformation springback makes the inner hole machining quality not meet product requirements, at the same time, end face machining has no support, and elasticity is generated during machining, which affects end face runout, so that the product qualification rate of motor steel cover is low. SUMMARY

[0003] The utility model discloses a kind of clamping and positioning device of motor steel cover hole and end face in vehicle, can be positioned and supported when motor steel cover hole and end face, prevent motor steel cover from deforming before machining and springback after machining.

[0004] Technical scheme: to achieve the above object, a kind of clamping and positioning device of motor steel cover hole and end face in vehicle of the utility model, including base, base is provided with multiple jaw chuck, multiple jaw chuck has several clamping claws;When motor steel cover is sleeved on several clamping claws, several clamping claws can cooperate expansion and support on the inner circumferential surface of motor steel cover;Base is also provided with several support plates, and several support plates are distributed in ring around multiple jaw chuck with multiple jaw chuck as center;Support plate is provided with telescopic radial auxiliary support and axial auxiliary support on the end away from base;When motor steel cover is sleeved on several clamping claws, radial auxiliary support can extend to the outer circumferential surface of motor steel cover along radial direction, and axial auxiliary support can extend to the end surface of motor steel cover along axial direction.

[0005] Further, at least one of the clamping claws is provided with a hooking plate, which can be extended and retracted along the axial direction;When the motor steel cover is sleeved on the several clamping claws, the hooking plate can hook the motor steel cover, and after retraction, the motor steel cover can be pressed on the multiple jaw chuck.

[0006] Further, a sliding hole is formed in the clamping claw, a piston rod is installed in the sliding hole, one end of the piston rod extends into the sliding hole and is connected to a spring member, the other end of the piston rod extends out of the sliding hole and is connected to the hooking plate;The clamping claw has a first hydraulic oil passage connected to the sliding hole, and the first hydraulic oil passage pushes the piston rod to extend when oil is supplied;When the first hydraulic oil passage stops supplying oil, the spring member pulls the piston rod to retract.

[0007] Further, an adjusting nut is installed at the aperture of the sliding hole, which can prevent the piston rod from separating from the sliding hole.

[0008] Further, the spring member is a nitrogen spring.

[0009] Further, the support plate has a second hydraulic oil path, which can supply oil to the radial auxiliary support and the axial auxiliary support, and push the radial auxiliary support and the axial auxiliary support to extend when the oil is supplied.

[0010] Further, the inner side of the support plate is provided with a limiting ring, which can limit the outer circumferential surface of the motor steel sleeve.

[0011] Further, the multi-jaw chuck is provided with a limiting pin, and the end of the motor steel sleeve towards the multi-jaw chuck is provided with a limiting hole matched with the limiting pin; when the limiting pin is inserted into the limiting hole, the motor steel sleeve is limited in the circumferential direction.

[0012] Beneficial effects: the motor steel sleeve hole and end face clamping and positioning device can make the piston rod descend and the hooking plate press the motor steel sleeve tightly after the motor steel sleeve is installed on the clamping jaw, and supply oil to the radial auxiliary support and the axial auxiliary support on the support plate to generate radial and axial holding force on the motor steel sleeve, so as to improve the rigidity of the motor steel sleeve and ensure the machining precision of the motor steel sleeve. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 is a schematic structural view of the clamping and positioning device of the utility model; Fig. 1 Fig. 1 is a schematic structural view of the clamping and positioning device of the utility model;

[0014] Fig. 1 is a schematic structural view of the clamping and positioning device of the utility model; Fig. 2 Fig. 1 is a schematic structural view of the clamping and positioning device of the utility model; DETAILED DESCRIPTION

[0015] The utility model will be further described in connection with the drawings.

[0016] Fig. 1 is a schematic structural view of the clamping and positioning device of the utility model; Figs. 1-2The aforementioned clamping and positioning device for the inner hole and end face of a motor steel sleeve includes a base 2. One side of the base 2 is connected to the spindle of a CNC machine tool via a connecting plate 1. A multi-jaw chuck 3 is provided on the other side of the base 2, and the multi-jaw chuck 3 has several jaws 14. In one embodiment, the multi-jaw chuck 3 is a hydraulic three-jaw chuck. When oil is supplied to the multi-jaw chuck 3, the jaws 14 can move radially. It should be noted that the radial, axial, and circumferential directions mentioned in this article are all relative to the multi-jaw chuck 3. When the motor steel sleeve 9 is fitted onto the several jaws 14, the several jaws 14 can cooperate to expand and support the inner circumferential surface of the motor steel sleeve 9, thereby clamping the motor steel sleeve 9 onto the multi-jaw chuck 3.

[0017] If only a multi-jaw chuck 3 is used to fix the motor steel sleeve 9, the motor steel sleeve 9, being a thin-walled part, may deform before machining. After machining, the deformation will spring back, resulting in the inner hole machining quality of the motor steel sleeve 9 failing to meet product requirements. Furthermore, when machining the end face of the motor steel sleeve 9, the lack of support will cause elasticity during machining, affecting end face runout and thus resulting in a low product qualification rate for the motor steel sleeve 9.

[0018] Therefore, in this invention, a plurality of support plates 4 are also provided on the base 2. The support plates 4 and the multi-jaw chuck 3 are on the same side of the base 2, and the plurality of support plates 4 are distributed circumferentially around the multi-jaw chuck 3. The length direction of the support plates 4 is along the axial direction, and a retractable radial auxiliary support 7 and an axial auxiliary support 8 are provided on the end of the support plate 4 away from the base 2. When the motor steel sleeve 9 is fitted onto the plurality of jaws 14, the radial auxiliary support 7 can extend radially to grip the outer circumferential surface of the motor steel sleeve 9, and the axial auxiliary support 8 can extend axially to abut the end face of the motor steel sleeve 9.

[0019] The chuck 14 and radial auxiliary support 7 limit the movement of the motor steel sleeve 9 from its inner and outer circumferences, respectively, which can improve the machining rigidity of the motor steel sleeve 9 and prevent deformation during machining. The axial auxiliary support 8 can provide support to the end face of the motor steel sleeve 9, making it less prone to elastic runout during machining.

[0020] At least one of the jaws 14 is equipped with a hook plate 12, which is axially retractable. When the motor sleeve 9 is fitted onto the jaws 14, the end of the motor sleeve 9 facing the multi-jaw chuck 3 has an annular edge. The hook plate 12 can hook onto the annular edge of the motor sleeve 9, and after retracting, it can press the motor sleeve 9 onto the multi-jaw chuck 3. The hook plate 12 and the axial auxiliary support 8 exert opposite forces on the motor sleeve 9, thereby clamping the motor sleeve 9 axially and making it less prone to deformation during processing.

[0021] Specifically, as shown in the attached document Fig. 2As shown, the chuck 14 has a sliding hole that extends axially. A piston rod 11 is installed inside the sliding hole and can slide within it. An adjusting nut 13 is installed at the opening of the sliding hole to prevent the piston rod 11 from disengaging. One end of the piston rod 11 extends into the sliding hole and is connected to a spring; in one embodiment, the spring is a nitrogen spring 10. The other end of the piston rod 11 extends out of the sliding hole and is connected to a hook plate 12. The chuck 14 has a first hydraulic oil circuit connected to the sliding hole. When the first hydraulic oil circuit supplies oil, it pushes the piston rod 11 outward, thereby causing the hook plate 12 to extend outward. When the first hydraulic oil circuit stops supplying oil, the spring pulls the piston rod 11 back, thereby causing the hook plate 12 to retract.

[0022] The support plate 4 has a second hydraulic oil circuit, which can supply oil to the radial auxiliary support 7 and the axial auxiliary support 8, and push the radial auxiliary support 7 and the axial auxiliary support 8 to extend when oil is supplied.

[0023] Limiting rings 6 are installed on the inner side of several of the support plates 4. The limiting rings 6 are located in the middle of the support plates 4 and can limit the outer peripheral surface of the motor steel sleeve 9.

[0024] The multi-jaw chuck 3 is also provided with a limit pin 5, and the end of the motor steel sleeve 9 facing the multi-jaw chuck 3 has a limit hole that mates with the limit pin 5. When the limit pin 5 is inserted into the limit hole, it limits the circumferential movement of the motor steel sleeve 9.

[0025] The working principle of this utility model is as follows: In the initial state, the multiple jaws 14 of the multi-jaw chuck 3 are at their minimum diameter. Oil is supplied to the base 2 through the centralized oil supply system at the rear end of the CNC machine tool spindle. Through the oil circuit distribution inside the base 2, oil is supplied to the first hydraulic oil circuit inside the jaws 14, causing the piston rod 11 to drive the hook pressure plate 12 to extend outward. Then, the motor steel sleeve 9 is installed, and the limiting ring 6 on the support plate 4 plays a limiting role. Then, oil is supplied to the multi-jaw chuck 3, causing the jaws 14 to move radially. The multiple jaws 14 cooperate to perform an expansion action, and the multiple jaws 14 support the electric motor. On the inner circumferential surface of the motor steel sleeve 9, the motor steel sleeve 9 is positioned, and at the same time, the limiting pin 5 limits the circumferential movement of the motor steel sleeve 9. Then, the oil supply to the piston cylinder is stopped, and the piston rod 11 drives the hook pressure plate 12 to retract under the action of the nitrogen spring 10, thereby pressing the motor steel sleeve 9. Then, the oil is supplied in two directions through the base 2 and the support plate 4, which causes the radial auxiliary support 7 and the axial auxiliary support 8 to extend and contact the outer circumferential surface and end face of the motor steel sleeve 9, generating radial and axial clamping forces, thereby improving the machining rigidity of the motor steel sleeve 9 and ensuring the machining accuracy of the motor steel sleeve 9.

[0026] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A clamping and positioning device for the inner hole and end face of a motor steel sleeve, characterized in that: Includes a base (2), on which a multi-jaw chuck (3) is provided, and on which a number of jaws (14) are provided; when the motor steel sleeve (9) is fitted onto the number of jaws (14), the number of jaws (14) can cooperate to expand and support on the inner circumferential surface of the motor steel sleeve (9); The base (2) is also provided with several support plates (4), which are distributed in a ring around the multi-jaw chuck (3). The support plate (4) is provided with a retractable radial auxiliary support (7) and an axial auxiliary support (8) at one end away from the base (2). When the motor steel sleeve (9) is fitted on several jaws (14), the radial auxiliary support (7) can extend radially to hug the outer circumference of the motor steel sleeve (9), and the axial auxiliary support (8) can extend axially to abut the end face of the motor steel sleeve (9).

2. The clamping and positioning device for the inner hole and end face of a motor steel sleeve according to claim 1, characterized in that: At least one of the jaws (14) is equipped with a hook plate (12), which can extend and retract axially. When the motor steel sleeve (9) is fitted onto several jaws (14), the hook plate (12) can hook the motor steel sleeve (9), and after the hook plate (12) retracts, it can press the motor steel sleeve (9) onto the multi-jaw chuck (3).

3. The clamping and positioning device for the inner hole and end face of a motor steel sleeve according to claim 2, characterized in that: The claw (14) has a sliding hole, and a piston rod (11) is installed in the sliding hole. One end of the piston rod (11) extends into the sliding hole and is connected to a spring, and the other end of the piston rod (11) extends out of the sliding hole and is connected to a hook plate (12). The claw (14) has a first hydraulic oil circuit that is connected to the sliding hole. When the first hydraulic oil circuit supplies oil, it pushes the piston rod (11) to extend outward. When the first hydraulic oil circuit stops supplying oil, the spring pulls the piston rod (11) to retract.

4. The clamping and positioning device for the inner hole and end face of a motor steel sleeve according to claim 3, characterized in that: An adjusting nut (13) is installed at the opening of the sliding hole. The adjusting nut (13) can prevent the piston rod (11) from disengaging from the sliding hole.

5. The clamping and positioning device for the inner hole and end face of a motor steel sleeve according to claim 3, characterized in that: The spring is a nitrogen spring (10).

6. The clamping and positioning device for the inner hole and end face of a motor steel sleeve according to claim 1, characterized in that: The support plate (4) has a second hydraulic oil circuit, which can supply oil to the radial auxiliary support (7) and the axial auxiliary support (8) and push the radial auxiliary support (7) and the axial auxiliary support (8) to extend when oil is supplied.

7. The clamping and positioning device for the inner hole and end face of a motor steel sleeve according to claim 1, characterized in that: Limiting rings (6) are installed on the inner side of several of the support plates (4), and the limiting rings (6) can limit the outer peripheral surface of the motor steel sleeve (9).

8. The clamping and positioning device for the inner hole and end face of a motor steel sleeve according to claim 1, characterized in that: The multi-jaw chuck (3) is provided with a limiting pin (5), and the end of the motor steel sleeve (9) facing the multi-jaw chuck (3) has a limiting hole that matches the limiting pin (5); when the limiting pin (5) is inserted into the limiting hole, it limits the circumferential movement of the motor steel sleeve (9).

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