Turning clamp for motor base

Abstract

The turning clamp for the motor base comprises a clamp base and a self-centering chuck, and the self-centering chuck comprises an annular boss, an annular installation disc and a plurality of centering claws. The centering claws are fixed to the top face of the annular boss and horizontally extend to the position above the annular installation disc in a radial mode around the vertical center line of the annular boss, and each centering claw comprises a base receiving part. The base receiving part comprises a first arc-shaped receiving groove and a second arc-shaped receiving groove which are spaced from each other in the horizontal extension direction of the centering claws, and an annular flange at the first end of the motor base with the first diameter can be received in the first arc-shaped receiving groove of the centering claws. And an annular flange at the first end of the motor base with a second diameter can be received in the second arc-shaped receiving grooves of the plurality of centering claws, and the first diameter is smaller than the second diameter. The turning clamp can be used for machining motor bases with different diameters on the same automatic production line, and the motor bases do not need to be remodeled.

Description

Technical Field

[0001] The utility model relates to a turning fixture, in particular to a turning fixture used for a motor base. Background Art

[0002] The existing turning fixtures are usually only suitable for a specific motor base and are manual type fixtures. In addition, the clamping point of the turning fixture is only located at the lower end of the motor base, while the upper end is suspended, which will cause vibration during high-speed turning and cause turning chatter marks, thus affecting product quality and turning efficiency.

[0003] Existing turning fixtures usually reduce the rotation speed to avoid the generation of turning chatter marks, which results in low efficiency and manual fixtures cannot be applied to automated production lines. Utility Model Content

[0004] In order to overcome the above-mentioned defects existing in the prior art, the utility model provides a turning fixture for a motor base, wherein the motor base has a cylindrical shape and includes an annular body and two annular flanges respectively connected to the first end and the second end of the annular body opposite to each other in the axial direction, wherein the turning fixture includes: a fixture base; and a self-centering chuck, wherein the self-centering chuck is arranged on the fixture base for receiving the motor base, and the self-centering chuck includes: an annular boss, wherein the annular boss has a central through hole and is fixed to the fixture base; an annular mounting disk, wherein the annular mounting disk surrounds the outer side of the annular boss and is fixed to the fixture base concentrically with the annular boss; and a plurality of centering claws, A plurality of centering claws are fixed on the top surface of the annular boss and extend horizontally radially around the vertical center line of the annular boss to the top of the annular mounting plate, each centering claw includes a base receiving portion for receiving the motor base, the base receiving portion includes a first arc receiving groove and a second arc receiving groove spaced apart from each other in the horizontal extension direction of the centering claw, the annular flange at the first end of the motor base having a first diameter can be received in the first arc receiving groove of the plurality of centering claws, and the annular flange at the first end of the motor base having a second diameter can be received in the second arc receiving groove of the plurality of centering claws, wherein the first diameter is smaller than the second diameter. Accordingly, motor bases with different diameters can be processed on the same automatic production line, and the changeover time is extremely short.

[0005] Furthermore, the self-centering chuck further comprises a circular cover plate for covering the central through hole of the annular boss, thereby preventing iron filings generated during the turning process from entering the self-centering chuck.

[0006] Further, the turning fixture also includes a base positioning device for determining whether the motor base is correctly installed on the base receiving portion, and the base positioning device includes: two groups of pneumatic detection pins, each group of pneumatic detection pins includes at least one pneumatic detection pin, the two groups of pneumatic detection pins are arranged on the annular mounting plate, and when the motor base is correctly installed on the base receiving portion, the corresponding pneumatic detection pin is pressed down a specific distance by the annular flange at the first end of the motor base; and an airtightness detector, the airtightness detector communicates with the two groups of pneumatic detection pins and is configured to determine that the motor base is correctly installed on the base receiving portion by detecting that the corresponding pneumatic detection pin is pressed down the specific distance. Accordingly, the correct installation of the motor base can be conveniently determined.

[0007] Further, the two groups of pneumatic detection pins include: a first group of pneumatic detection pins, the first group of pneumatic detection pins are positioned on the circumference of a first virtual circle formed by the first arc-shaped receiving grooves of the plurality of centering claws, so as to detect whether the motor base with a first diameter is correctly installed on the base receiving portion; and a second group of pneumatic detection pins, the second group of pneumatic detection pins are positioned on the circumference of a second virtual circle formed by the second arc-shaped receiving grooves of the plurality of centering claws, so as to detect whether the motor base with a second diameter is correctly installed on the base receiving portion. Accordingly, the correct installation of motor bases of different diameters can be conveniently determined.

[0008] Furthermore, the turning fixture further comprises a holding mechanism for holding the motor base on the base receiving portion, thereby being able to firmly hold the motor base to avoid the generation of turning chatter marks.

[0009] Further, the holding mechanism includes two groups of clamping devices arranged on the clamp base, each group of clamping devices includes a plurality of clamping devices and is circumferentially arranged around the self-centering chuck on the outside of the self-centering chuck, the first group of clamping devices in the two groups of clamping devices is used to hold the motor base having a first diameter, and the second group of clamping devices in the two groups of clamping devices is used to hold the motor base having a second diameter, wherein each clamping device includes a claw portion and a cylinder portion associated with each other, and the claw portion is configured to be driven by the cylinder portion to engage with or disengage from a process clasp arranged on the annular body of the motor base. Accordingly, the complexity of the clamping device sharing can be reduced, and the operating rate of the automatic production line can be improved.

[0010] Furthermore, the clamping devices in the first group of clamping devices and the clamping devices in the second group of clamping devices are alternately arranged around the self-centering chuck. Accordingly, the space utilization rate can be improved under the premise of ensuring firm holding.

[0011] Further, the clamping device in the first group of clamping devices is positioned closer to the vertical center line of the annular boss of the self-centering chuck than the clamping device in the second group of clamping devices, or the clamping claw portion of the clamping device in the first group of clamping devices is longer than the clamping claw portion of the clamping device in the second group of clamping devices. Accordingly, the arrangement of multiple groups of clamping devices can be realized conveniently and space-efficiently.

[0012] Furthermore, the claw portion includes a tip portion for engaging the process tab on the annular body, and anti-slip teeth are formed on the tip portion, thereby being able to adapt to smaller process tabs and improving reliability.

[0013] Further, the holding mechanism further includes a plurality of telescopic cylinders, which are fixed on a bracket extending vertically from the fixture base and are circumferentially arranged on the outside of the motor base around the motor base mounted on the base receiving portion, each telescopic cylinder includes a cylinder body and a telescopic rod connected to each other, and the telescopic rod is configured to be able to extend and retract in a direction perpendicular to the vertical center line of the annular boss of the self-centering chuck so as to abut against the second end of the annular body of the motor base or detach from the second end of the annular body. Accordingly, it is possible to further provide retention at the upper end of the motor base to eliminate the generation of turning vibration marks, and at the same time, such a telescopic cylinder can also be conveniently adapted to motor bases of different diameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0015] Figure 1 is a schematic stereoscopic diagram showing a turning fixture of the present invention, wherein a motor base is installed in the turning fixture; and

[0016] Figure 2 It shows Figure 1 A schematic perspective view of a turning fixture is shown, wherein the motor base and the annular connecting plate are removed in order to more clearly illustrate the internal structure of the turning fixture.

[0017] Reference numerals list

[0018] 100 Turning fixture

[0019] 200 Motor base

[0020] 201 Ring body

[0021] 201a Crafts

[0022] 202 Annular flange

[0023] 1 Clamp base

[0024] 2 Self-centering chuck

[0025] 21 Annular boss

[0026] 22 Ring-shaped mounting plate

[0027] 23 Centering claw

[0028] 231 base receiving part

[0029] 231a First arc receiving groove

[0030] 231b Second arc receiving slot

[0031] 24 Round cover

[0032] 3 Base positioning device

[0033] 31 Pneumatic test pin

[0034] 4. Holding mechanism

[0035] 41 Clamping device

[0036] 411 claw part

[0037] 411a Tip

[0038] 412 Cylinder

[0039] 42 Telescopic Cylinder

[0040] 421 Cylinder

[0041] 422 Telescopic rod

[0042] 5 Bracket

[0043] 6 Ring connecting plate

[0044] L Vertical center line DETAILED DESCRIPTION

[0045] The following will be combined with the accompanying drawings in the embodiments of the utility model to describe the technical solutions in the embodiments of the utility model in detail. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict. The nouns and pronouns about people in the utility model are not limited to specific genders.

[0046] In the following detailed description, reference is made to the accompanying drawings that form a part of this specification, in which specific embodiments in which the utility model can be implemented are shown by way of example. With respect to the accompanying drawings, directional terms such as "top", "bottom", "inside", "outside", "up", "down", "front", "back" and the like are used with reference to the directions of the accompanying drawings described. Since the components of the embodiments of the utility model can be placed in many different directions, the directional terms are only used for illustration and are not intended to be limiting. It should be understood that other embodiments may be used and that structural or logical changes may be made without departing from the scope of the utility model. Therefore, the following detailed description should not be understood as limiting, and the utility model is defined by the appended claims.

[0047] Combined with reference Figure 1 and Figure 2 As shown, the utility model proposes a turning fixture 100 for a motor base 200. The motor base 200 has a substantially cylindrical shape and includes an annular body 201 and two annular flanges 202 respectively connected at a first end and a second end of the annular body 201 opposite to each other in the axial direction. During the turning operation, the motor base 200 is firmly held by the turning fixture 100.

[0048] The turning fixture 100 may generally include a fixture base 1 and a self-centering chuck 2 , which is disposed on the fixture base 1 for receiving a motor base 200 .

[0049] The self-centering chuck 2 may include an annular boss 21, an annular mounting plate 22, and a plurality of centering claws 23. The annular boss 21 may have a central through hole and be fixed on the fixture base 1. The annular mounting plate 22 may surround the outer side of the annular boss 21 and be fixed on the fixture base 1 concentrically with the annular boss 21. A plurality of centering claws 23 may be fixed on the top surface of the annular boss 21 and extend horizontally radially around the vertical center line L of the annular boss 21 to the top of the annular mounting plate 22. Each centering claw 23 may include a base receiving portion 231 for receiving the motor base 200. The base receiving portion 231 may include a first arc receiving groove 231a and a second arc receiving groove 231b spaced apart from each other in the horizontal extension direction of the centering claw 23, that is, the plurality of centering claws 23 radially extending horizontally around the vertical center line L of the annular boss 21 make the first arc receiving groove 231a of these centering claws 23 arranged as a part of a virtual circular receiving groove, and make the second arc receiving groove 231b of these centering claws 23 arranged as a part of another virtual circular receiving groove. The annular flange 202 at the first end of the motor base 200 having a first diameter can be received in the first arc receiving groove 231a of the plurality of centering claws 23, and the annular flange 202 at the first end of the motor base 200 having a second diameter can be received in the second arc receiving groove 231b of the plurality of centering claws 23, wherein the first diameter is smaller than the second diameter.

[0050] In particular, the plurality of centering claws 23 may be arranged at equal angular intervals from each other, thereby being able to support the motor base 200 more balanced and stably. Figure 1 Schematically shown are four centering claws 23, which are arranged at 90 degree intervals. Of course, the number of centering claws is not specifically limited and can be selected according to actual needs.

[0051] In one embodiment, the self-centering chuck 2 may further include a circular cover plate 24 for covering the central through hole of the annular boss 21 .

[0052] In addition, the turning fixture 100 may further include a base positioning device 3 for determining whether the motor base 200 is correctly mounted on the base receiving portion 231. The base positioning device 3 may include two groups of pneumatic detection pins, each group of pneumatic detection pins including at least one pneumatic detection pin 31. The two groups of pneumatic detection pins may be arranged on the annular mounting plate 22, and when the motor base 200 is correctly mounted on the base receiving portion 231, the corresponding pneumatic detection pin 31 is pressed down a specific distance by the annular flange 202 at the first end of the motor base 200, thereby causing a specific change in the amount of air leakage. The base positioning device 3 may further include an airtight detector (not shown), which communicates with the two groups of pneumatic detection pins and is configured to determine that the motor base 200 is correctly mounted on the base receiving portion 231 by detecting that the corresponding pneumatic detection pin is pressed down a specific distance (in particular, by detecting a specific change in the amount of air leakage).

[0053] In particular, the two groups of pneumatic detection pins may include a first group of pneumatic detection pins and a second group of pneumatic detection pins. The first group of pneumatic detection pins are positioned on the circumference of a first virtual circle formed by the first arc-shaped receiving grooves 231a of the plurality of centering claws 23, so as to detect whether the motor base 200 having a first diameter is correctly installed on the base receiving portion 231. The second group of pneumatic detection pins are positioned on the circumference of a second virtual circle formed by the second arc-shaped receiving grooves 231b of the plurality of centering claws 23, so as to detect whether the motor base 200 having a second diameter is correctly installed on the base receiving portion 231. For example, in Figure 1 It is schematically shown that each group of pneumatic detection pins has four pneumatic detection pins, the four pneumatic detection pins in each group of pneumatic detection pins are arranged equally spaced from each other in the circumferential direction, and each pneumatic detection pin in the first group of pneumatic detection pins is closer to the vertical center line L than each pneumatic detection pin in the second group of pneumatic detection pins. Of course, the number of pneumatic detection pins in each group of pneumatic detection pins is not specifically limited and can be selected according to actual needs.

[0054] In addition, the turning jig 100 may further include a holding mechanism 4 for holding the motor base 200 on the base receiving portion 231 .

[0055] The holding mechanism 4 may include two groups of clamping devices disposed on the clamp base 1. Each group of clamping devices includes a plurality of clamping devices 41 and is circumferentially arranged around the self-centering chuck 2 on the outside of the self-centering chuck 2. The first group of clamping devices in the two groups of clamping devices is used to hold a motor base 200 having a first diameter, and the second group of clamping devices in the two groups of clamping devices is used to hold a motor base 200 having a second diameter. Each clamping device 41 may include a claw portion 411 and a cylinder portion 412 associated with each other, and the claw portion 411 is configured to be driven by the cylinder portion 412 to engage with or disengage from a process latch 201a disposed on the annular body 201 of the motor base 200. In particular, the claw portion 411 may be connected to the cylinder portion 412 via a connecting rod mechanism to facilitate the opening and retraction of the claw portion 411. For example, in Figure 1 It is schematically shown that each group of clamping devices has four clamping devices. Of course, the number of clamping devices in each group of clamping devices is not specifically limited and can be selected according to actual needs.

[0056] In particular, the clamping devices of the first group of clamping devices and the clamping devices of the second group of clamping devices may be arranged alternately around the self-centering chuck 2 .

[0057] In particular, the clamping devices in the first set of clamping devices may be positioned closer to the vertical centerline L of the annular boss 21 of the self-centering chuck 2 than the clamping devices in the second set of clamping devices, whereby similar clamping devices may be used for the first set of clamping devices and the second set of clamping devices. Alternatively, the jaws of the clamping devices in the first set of clamping devices may be longer than the jaws of the clamping devices in the second set of clamping devices, whereby the clamping devices in the first set of clamping devices and the second set of clamping devices may be positioned at approximately the same distance from the vertical centerline L.

[0058] In particular, the claw portion 411 may include a tip portion 411 a for engaging with the process tab 201 a on the annular body 201 , and further, anti-slip teeth may be formed on the tip portion 411 a .

[0059] The holding mechanism 4 may further include a plurality of telescopic cylinders 42. The plurality of telescopic cylinders 42 are fixed to a bracket 5 vertically extending from the fixture base 1 and are circumferentially arranged on the outside of the motor base 200 around the motor base 200 mounted on the base receiving portion 231. Each telescopic cylinder 42 may include a cylinder body 421 and a telescopic rod 422 connected to each other, and the telescopic rod 422 is configured to be telescopic in a direction perpendicular to the vertical center line L of the annular boss 21 of the self-centering chuck 2 so as to abut against or be detached from the second end of the annular body 201 of the motor base 200.

[0060] In particular, the bracket 5 may be a single complete circumferential bracket, on which all the telescopic cylinders 42 are mounted. Alternatively, the bracket 5 may be a plurality of circumferential bracket segments separated from each other, each of which is mounted with a telescopic cylinder 42. In addition, the turning fixture 100 may further include an annular connecting plate 6 connected to the bracket 5 at the top, so as to connect the plurality of circumferential bracket segments together to improve the structural stability.

[0061] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A turning fixture for a motor base, the motor base (200) having a cylindrical shape and comprising an annular body (201) and two annular flanges (202) respectively connected to a first end and a second end of the annular body (201) opposite to each other in an axial direction, characterized in that: The turning fixture (100) comprises: A fixture base (1); and A self-centering chuck (2), the self-centering chuck (2) being arranged on the fixture base (1) for receiving the motor base (200), the self-centering chuck (2) comprising: An annular boss (21), the annular boss (21) having a central through hole and fixed on the clamp base (1); an annular mounting plate (22), the annular mounting plate (22) surrounding the outer side of the annular boss (21) and being fixed on the fixture base (1) concentrically with the annular boss (21); and A plurality of centering claws (23), wherein the plurality of centering claws (23) are fixed on the top surface of the annular boss (21) and extend horizontally and radially around the vertical center line (L) of the annular boss (21) to the top of the annular mounting plate (22), Each of the centering claws (23) includes a base receiving portion (231) for receiving the motor base (200), and the base receiving portion (231) includes a first arc-shaped receiving groove (231a) and a second arc-shaped receiving groove (231b) spaced apart from each other in the horizontal extension direction of the centering claw (23), and the annular flange (202) at the first end of the motor base (200) having a first diameter can be received in the first arc-shaped receiving groove (231a) of a plurality of the centering claws (23), and the annular flange (202) at the first end of the motor base (200) having a second diameter can be received in the second arc-shaped receiving groove (231b) of a plurality of the centering claws (23), wherein the first diameter is smaller than the second diameter.

2. The turning fixture for the motor base according to claim 1, characterized in that: The self-centering chuck (2) further comprises a circular cover plate (24) for covering the central through hole of the annular boss (21).

3. The turning fixture for a motor base according to claim 1, characterized in that: The turning fixture (100) further comprises a base positioning device (3) for determining whether the motor base (200) is correctly installed on the base receiving portion (231), and the base positioning device (3) comprises: two groups of pneumatic detection pins, each group of pneumatic detection pins comprising at least one pneumatic detection pin (31), the two groups of pneumatic detection pins being arranged on the annular mounting plate (22), and when the motor base (200) is correctly mounted on the base receiving portion (231), the corresponding pneumatic detection pin (31) is pressed down a specific distance by the annular flange (202) at the first end of the motor base (200); and An airtight detector communicates with the two groups of pneumatic detection pins and is configured to determine that the motor base (200) is correctly installed on the base receiving portion (231) by detecting that the corresponding pneumatic detection pins are pressed down by the specific distance.

4. The turning fixture for the motor base according to claim 3, characterized in that: The two sets of pneumatic detection pins include: A first group of pneumatic detection pins, the first group of pneumatic detection pins being positioned on the circumference of a first virtual circle formed by the first arc-shaped receiving grooves (231a) of a plurality of the centering claws (23), so as to detect whether the motor base (200) having a first diameter is correctly installed on the base receiving portion (231); and A second group of pneumatic detection pins, the second group of pneumatic detection pins are positioned on the circumference of a second virtual circle formed by the second arc-shaped receiving grooves (231b) of the plurality of centering claws (23), so as to detect whether the motor base (200) having a second diameter is correctly installed on the base receiving portion (231).

5. The turning fixture for a motor base according to claim 1, characterized in that: The turning fixture (100) further comprises a retaining mechanism (4) for retaining the motor base (200) on the base receiving portion (231).

6. The turning fixture for the motor base according to claim 5, characterized in that: The holding mechanism (4) includes two groups of clamping devices arranged on the clamp base (1), each group of clamping devices includes a plurality of clamping devices (41) and is circumferentially arranged around the self-centering chuck (2) on the outside of the self-centering chuck (2), the first group of clamping devices in the two groups of clamping devices being used to hold the motor base (200) having a first diameter, and the second group of clamping devices in the two groups of clamping devices being used to hold the motor base (200) having a second diameter, wherein each clamping device (41) includes a claw portion (411) and a cylinder portion (412) associated with each other, the claw portion (411) being configured to be driven by the cylinder portion (412) to engage with or disengage from a process latch (201a) arranged on the annular body (201) of the motor base (200).

7. The turning fixture for the motor base according to claim 6, characterized in that: The clamping devices in the first group of clamping devices and the clamping devices in the second group of clamping devices are arranged alternately around the self-centering chuck (2).

8. The turning fixture for a motor base according to claim 7, characterized in that: The clamping devices in the first group of clamping devices are positioned closer to the vertical center line (L) of the annular boss (21) of the self-centering chuck (2) than the clamping devices in the second group of clamping devices, or the claw portions of the clamping devices in the first group of clamping devices are longer than the claw portions of the clamping devices in the second group of clamping devices.

9. The turning fixture for a motor base according to claim 6, characterized in that: The claw portion (411) includes a tip portion (411a) for engaging the process tab (201a) on the annular body (201), and anti-slip teeth are formed on the tip portion (411a).

10. The turning fixture for a motor base according to claim 5, characterized in that: The holding mechanism (4) also includes a plurality of telescopic cylinders (42), which are fixed on a bracket (5) extending vertically from the clamp base (1) and are circumferentially arranged on the outer side of the motor base (200) around the motor base (200) mounted on the base receiving portion (231), each telescopic cylinder (42) including a cylinder body (421) and a telescopic rod (422) connected to each other, the telescopic rod (422) being configured to be able to extend and retract in a direction perpendicular to the vertical center line (L) of the annular boss (21) of the self-centering chuck (2) so as to abut against the second end of the annular body (201) of the motor base (200) or to detach from the second end of the annular body (201).

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