Turning clamp

Abstract

The turning clamp is suitable for a three-lug type motor base and a four-lug type motor base, the turning clamp comprises a clamp base and a plurality of hydraulic cylinders, the three-lug type motor base or the four-lug type motor base is vertically placed on the clamp base, and the first end of an annular body of the three-lug type motor base or the four-lug type motor base is located above the second end of the annular body of the three-lug type motor base or the four-lug type motor base; the multiple hydraulic cylinders are arranged on the clamp base, three hydraulic cylinders in the multiple hydraulic cylinders are configured to be a first set of hydraulic cylinders, and the first set of hydraulic cylinders can be matched with three lugs of the three-lug type motor base so as to clamp the three-lug type motor base at the first end of an annular body of the three-lug type motor base. Four hydraulic cylinders in the plurality of hydraulic cylinders are configured as a second group of hydraulic cylinders, and the second group of hydraulic cylinders can be matched with the four lugs of the four-lug type motor base so as to clamp the four-lug type motor base at the first end of the annular main body of the four-lug type motor base. Through the arrangement mode, the product quality and the production line efficiency can be improved.

Description

Technical Field

[0001] The present application relates to a turning fixture, in particular to a vertical turning fixture, which is suitable for a three-piece motor base and a four-piece motor base. Background Art

[0002] In this field, automated production lines need to accommodate two types of motor bases: three-piece and four-piece. To ensure product quality and production line efficiency, motor base deformation and changeover time must be minimized. However, existing turning fixtures suffer from lengthy changeover times, significant product deformation, and the need to replace and adjust numerous components. Utility Model Content

[0003] In order to overcome the above-mentioned defects in the prior art, the present application provides a turning fixture, which is suitable for a three-lever motor base and a four-lever motor base, each of the three-lever motor base and the four-lever 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, the three-lever motor base is provided with three latches at the first end of its annular body, and the three latches are evenly distributed on the outer surface of the annular body along the circumferential direction of the annular body of the three-lever motor base, and the four-lever motor base is provided with four latches at the first end of its annular body, and the four latches are evenly distributed on the outer surface of the annular body along the circumferential direction of the annular body of the four-lever motor base, The clamp includes: a clamp base, the three-branch motor base or the four-branch motor base is upright placed on the clamp base and the first end of the annular body of the three-branch motor base or the four-branch motor base is located above the second end; and a plurality of hydraulic cylinders, the plurality of hydraulic cylinders are arranged on the clamp base, three hydraulic cylinders of the plurality of hydraulic cylinders are configured as a first group of hydraulic cylinders, the first group of hydraulic cylinders can cooperate with the three braces of the three-branch motor base to clamp the three-branch motor base at the first end of the annular body of the three-branch motor base, and four hydraulic cylinders of the plurality of hydraulic cylinders are configured as a second group of hydraulic cylinders, the second group of hydraulic cylinders can cooperate with the four braces of the four-branch motor base to clamp the four-branch motor base at the first end of the annular body of the four-branch motor base. Based on this, the turning fixture is compatible with two different types of motor bases. By selectively activating the first set of hydraulic cylinders or the second set of hydraulic cylinders, the installed motor base can be clamped, thereby significantly shortening the changeover time while improving product quality and production line efficiency.

[0004] Furthermore, the plurality of hydraulic cylinders includes six hydraulic cylinders, three of which are configured as the first group of hydraulic cylinders, and four of which are configured as the second group of hydraulic cylinders. The first and second groups of hydraulic cylinders share one hydraulic cylinder. This reduces the number of hydraulic cylinders and thus reduces costs.

[0005] Furthermore, each of the multiple hydraulic cylinders includes a cylinder body fixed to the clamp base; a telescopic rod connected to the cylinder body and configured to extend and retract vertically; and a pressure plate comprising a connecting section and a pressing section connected to each other, the connecting section being connected to the free end of the telescopic rod, and the pressing section being configured to press the corresponding tab from above. This allows for convenient and secure clamping, while also providing a large lowering stroke for compatibility with motor mounts of varying lengths.

[0006] Furthermore, the hydraulic cylinder is configured to drive the pressing plate to rotate around the extension axis of the telescopic rod. Accordingly, the motor base can be conveniently installed and removed.

[0007] Furthermore, the pressing section is radially inward of the connecting section and vertically above the connecting section of the three-piece or four-piece motor base. This arrangement of the pressing plate effectively avoids the machine tool's interference zone, increasing the machine tool's effective travel range and reducing costs. Furthermore, the pressing plate can be made thicker to increase the contact area and friction between the pressing plate and the telescopic rod.

[0008] Furthermore, the turning fixture further includes: a bracket connected to the fixture base and extending vertically upward from the fixture base; and an annular connecting plate connected to the top of the bracket, the plurality of hydraulic cylinders being disposed on the annular connecting plate. This can reduce the size of the hydraulic cylinders, thereby reducing costs.

[0009] Furthermore, the turning fixture further includes a plurality of positioning blocks fixed to the fixture base and circumferentially arranged around the central axis of the annular body of the three-piece motor base or the four-piece motor base to support the annular flange at the second end of the annular body of the three-piece motor base or the four-piece motor base. This allows the motor base to be stably placed on the fixture base and to be stably clamped.

[0010] Furthermore, the plurality of positioning blocks includes three positioning blocks, which are circumferentially and evenly spaced around the central axis of the annular body of the three-piece motor base or the four-piece motor base. The pressing sections of the pressure plates of the first group of hydraulic cylinders are projected onto the fixture base adjacent to the three positioning blocks, and the pressing sections of the pressure plates of the three hydraulic cylinders in the second group of hydraulic cylinders are projected onto the fixture base adjacent to the three positioning blocks. The three hydraulic cylinders in the second group of hydraulic cylinders include the shared one hydraulic cylinder. Thus, the motor base can be stably positioned, and costs can be reduced by reducing the number of positioning blocks.

[0011] Furthermore, the turning fixture further includes a plurality of groups of support cylinders, each group of support cylinders including at least one support cylinder, the plurality of support cylinders being fixed on the fixture base and being arranged alternately with the plurality of positioning blocks on the circumference of the virtual circle where the plurality of positioning blocks are located so as to selectively support the annular flange at the second end of the annular body of the three-piece motor base or the four-piece motor base. Accordingly, the motor base can be auxiliary supported by the support cylinders, and chip removal can be achieved while increasing support points below the motor base. In particular, for the four-piece motor base, when the four pieces are clamped downward from the top, the bottom of the motor base can be stably supported by the support cylinders, thereby reducing the deformation of the motor base.

[0012] Furthermore, the turning fixture further includes a centering device disposed on the fixture base for holding the three-piece motor base or the four-piece motor base at the second end of the annular body of the three-piece motor base or the four-piece motor base, thereby ensuring the positioning accuracy of the motor base.

[0013] Furthermore, the centering device includes: an annular boss, which has a circular central through hole and is fixed to the clamp base; an annular mounting plate, which surrounds the outer side of the annular boss and is fixed to the clamp base concentrically with the annular boss; and a plurality of centering claws, the plurality of centering claws are arranged above 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, the vertical center line of the annular boss coincides with the central axis of the annular body of the three-prong motor base or the four-prong motor base, and the centering claws are configured to be able to radially retract to abut against the inner surface of the annular body of the three-prong motor base or the four-prong motor base or to detach from the inner surface of the annular body of the three-prong motor base or the four-prong motor base. Based on this, the centering claws are easy to replace and compatible with motor bases of different diameters. It also makes the repeat positioning accuracy high and the change of model convenient after the model change.

[0014] Furthermore, the centering device further comprises a circular cover plate for covering the circular central through hole of the annular boss, thereby preventing debris from entering the circular central through hole.

[0015] Furthermore, the circular cover plate includes multiple inclined portions on its periphery, sloping downward from the radially inner side to the radially outer side. Each inclined portion is aligned with a corresponding centering claw, and the lowest point of each inclined portion is no higher than the bottom surface of the centering claw in the vertical direction. Accordingly, the circular cover plate's sloped design allows debris to be discharged through the inclined portions when the centering claws are retracted after being opened. This prevents debris from blocking the retraction of the centering claws, thereby ensuring centering accuracy.

[0016] Furthermore, the inner diameter of the annular body of the three-piece motor base is different from the inner diameter of the annular body of the four-piece motor base. Accordingly, the turning fixture can be adapted to motor bases of different diameters.

[0017] Furthermore, the centering claw includes a first positioning member, which includes a fixed portion and a connecting portion connected to each other. The first positioning member is connected to the movable cylinder located in the annular boss via the fixed portion, and the connecting portion is located above the annular mounting plate. Thus, the centering claw can be easily installed.

[0018] Furthermore, the centering claw further includes a second positioning member removably connected to the connecting portion of the first positioning member, wherein a radial distal end of the second positioning member is further away from the central axis of the annular body of the three-piece motor base or the four-piece motor base than the radial distal end of the first positioning member. Accordingly, the centering claw can be conveniently adapted to motor bases of different diameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the accompanying drawings:

[0020] Figure 1 1 is a schematic top view of a three-piece motor base of the present application;

[0021] Figure 2 1 is a schematic top view of a four-piece motor base of the present application;

[0022] Figure 3 is a perspective view schematically showing a turning fixture of the present application;

[0023] Figure 4 It shows Figure 3 a top perspective view of the turning fixture shown;

[0024] Figure 5 It shows Figure 3 A perspective view of the hydraulic cylinder of the turning fixture shown;

[0025] Figure 6 It shows Figure 3 A perspective view of the centering device of the turning fixture shown;

[0026] Figure 7 It shows Figure 6 Detail of the centering device shown;

[0027] Figure 8 It shows Figure 6 A perspective view of the first positioning member of the centering claw of the centering device shown; and

[0028] Figure 9 It shows Figure 6 A three-dimensional view of the second positioning piece of the centering claw of the centering device is shown.

[0029] Reference Signs List

[0030] 100 Turning fixture

[0031] 101 Ring body

[0032] 102 annular flange

[0033] 10 Three-piece motor base

[0034] 10' four-piece motor base

[0035] A partner

[0036] 1 Clamp base

[0037] 2 hydraulic cylinders

[0038] 21 cylinder block

[0039] 22 telescopic rod

[0040] 23 pressure plate

[0041] 231 connecting segment

[0042] 232 Pressing section

[0043] 3 brackets

[0044] 4 Ring connecting plate

[0045] 5 Positioning block

[0046] 6 Support Cylinders

[0047] 7 Centering device

[0048] 71 annular boss

[0049] 72 Ring-shaped mounting plate

[0050] 73 Centering claw

[0051] 731 First positioning piece

[0052] 731A Fixed part

[0053] 731B connection

[0054] 732 Second positioning piece

[0055] 74 round cover

[0056] 741 inclined portion

[0057] L1 extension axis

[0058] L2 center axis

[0059] L3 vertical centerline

[0060] H round center hole

[0061] M Moving Cylinder DETAILED DESCRIPTION

[0062] The following will be combined with the accompanying drawings in the embodiments of the present application to describe the technical solutions in the embodiments of the present application in detail. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other if there is no conflict.

[0063] 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 application may be implemented are shown by way of illustration. With respect to the drawings, directional terms such as "top," "bottom," "inside," "outside," "up," "down," "front," "back," and the like are used with reference to the orientation of the drawings being described. Because the components of the embodiments of the present application can be placed in many different orientations, the directional terms are used for illustration only 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 present application. Therefore, the following detailed description should not be construed in a limiting sense, and the application is defined by the appended claims.

[0064] refer to Figure 3 and Figure 4 The present application proposes a turning fixture 100, which is suitable for a three-piece motor base 10 (such as Figure 1 As shown) and four-piece motor base 10 '(as shown Figure 2 shown), i.e., compatible with both types of motor bases.

[0065] like Figure 1 and Figure 2 As shown, each of the three-bracket motor base 10 and the four-bracket motor base 10' has a cylindrical shape and includes an annular body 101 and two annular flanges 102 respectively connected to the first end and the second end of the annular body 101 opposite to each other in the axial direction. The three-bracket motor base 10 is provided with three brackets A at the first end of its annular body 101, and these three brackets A are evenly (especially, evenly spaced) distributed on the outer surface of the annular body 101 along the circumferential direction of the annular body 101 of the three-bracket motor base 10. The four-bracket motor base 10' is provided with four brackets A at the first end of its annular body 101, and these four brackets A are evenly (especially, evenly spaced) distributed on the outer surface of the annular body 101 along the circumferential direction of the annular body 101 of the four-bracket motor base 10'. It should be pointed out here that when the three-bracket motor base 10 and the four-bracket motor base 10' are as shown Figure 3 When the annular body is erected on the turning fixture 100 in the manner shown in FIG, the first end of the annular body is its upper end and the second end is its lower end.

[0066] like Figure 3 As shown, the turning fixture 100 generally includes a fixture base 1 and a plurality of hydraulic cylinders 2 .

[0067] The three-piece motor base 10 or the four-piece motor base 10 ′ is placed upright on the fixture base 1 and the first end of the annular body 101 of the three-piece motor base 10 or the four-piece motor base 10 ′ is located above the second end.

[0068] The plurality of hydraulic cylinders 2 can be disposed on the fixture base 1, i.e., directly or indirectly on the fixture base 1. For example, the cylinder bodies 21 of the plurality of hydraulic cylinders 2 can be directly disposed on the fixture base 1, or can be indirectly disposed on the fixture base 1 by means of the bracket 3 and / or the annular connecting plate 4.

[0069] Three of the plurality of hydraulic cylinders 2 are configured as a first group of hydraulic cylinders that can cooperate with the three straps A of the three-stack motor base 10 to clamp the three-stack motor base 10 at the first end of the annular body 101 of the three-stack motor base 10. Four of the plurality of hydraulic cylinders 2 are configured as a second group of hydraulic cylinders that can cooperate with the four straps A of the four-stack motor base 10' to clamp the four-stack motor base 10' at the first end of the annular body 101 of the four-stack motor base 10'.

[0070] In the present application, since the motor base is upright on the clamp base 1, the hydraulic cylinders can abut against the corresponding brackets A from above to achieve clamping of the motor base. Of course, the present application is not limited to this. For example, the hydraulic cylinders can also abut against the corresponding brackets A from the side, such as in the radial direction, to achieve clamping of the motor base.

[0071] like Figure 3 and Figure 4 As shown, the plurality of hydraulic cylinders 2 may include six hydraulic cylinders, three of the six hydraulic cylinders are configured as a first group of hydraulic cylinders, and four of the six hydraulic cylinders are configured as a second group of hydraulic cylinders, wherein the first group of hydraulic cylinders and the second group of hydraulic cylinders share one hydraulic cylinder, i.e., Figure 3 The hydraulic cylinder is shown on the lower left side.

[0072] Of course, the present application is not limited to this. For example, the multiple hydraulic cylinders 2 can also include seven hydraulic cylinders, and these seven hydraulic cylinders are divided into two groups, namely, a first group of hydraulic cylinders with three hydraulic cylinders and a second group of hydraulic cylinders with four hydraulic cylinders. These two groups of hydraulic cylinders do not share hydraulic cylinders.

[0073] like Figure 5As shown, each of the multiple hydraulic cylinders 2 may include a cylinder body 21, a telescopic rod 22, and a pressure plate 23. The cylinder body 21 may be fixed to the clamp base 1, that is, directly or indirectly fixed to the clamp base 1. The telescopic rod 22 may be connected to the cylinder body 21 and configured to be telescopic in the vertical direction. Of course, as mentioned above, for the case where the hydraulic cylinder rests on the corresponding tab A from the side, the telescopic rod 22 may be configured to be telescopic in the horizontal direction. The pressure plate 23 may include a connecting section 231 and a pressing section 232 connected to each other, the connecting section 231 being connected to the free end of the telescopic rod 22, and the pressing section 232 being configured to press the corresponding tab from above.

[0074] In addition, the hydraulic cylinder 2 can be configured to drive the pressing plate 23 to rotate around the extension axis L1 of the telescopic rod 22, for example, to rotate 90 degrees so as to be away from the motor base, thereby facilitating the installation and removal of the motor base.

[0075] In particular, the pressing section 232 may be located inside the connecting section 231 in the radial direction of the three-piece motor base 10 or the four-piece motor base 10' and above the connecting section 231 in the vertical direction, for example, Figure 5 As shown in FIG, the pressing plate 23 has a generally S-shape.

[0076] like Figure 3 As shown, the turning fixture 100 may further include a bracket 3 and an annular connecting plate 4. The bracket 3 may be connected to the fixture base 1 and extend vertically upward from the fixture base 1. The annular connecting plate 4 is connected to the top of the bracket 3, and a plurality of hydraulic cylinders 2 may be provided on the annular connecting plate 4. Of course, the present application is not limited thereto, for example, the annular connecting plate 4 may not be included, and a plurality of hydraulic cylinders 2 may be provided on the bracket 3. In addition, the bracket 3 may include one or more brackets, for example, all the hydraulic cylinders may be provided on a single annular bracket, or may be provided on a plurality of separate brackets, for example, one hydraulic cylinder is provided on each bracket.

[0077] Combine Figure 3 、 Figure 4 and Figure 6 As shown, the turning fixture 100 may also include a plurality of positioning blocks 5, which are fixed on the fixture base 1 and are circumferentially arranged around the central axis L2 of the annular body 101 of the three-piece motor base 10 or the four-piece motor base 10' for supporting the annular flange 102 of the three-piece motor base 10 or the four-piece motor base 10' at the second end of its annular body 101.

[0078] In particular, the plurality of positioning blocks 5 may include three positioning blocks, which are circumferentially and equally spaced around the central axis L2 of the annular body 101 of the three-piece motor base 10 or the four-piece motor base 10 ′.

[0079] In particular, the projection position of the pressing section 232 of the pressing plate 23 of the first group of hydraulic cylinders on the clamp base 1 is adjacent to the three positioning blocks, and the projection position of the pressing section 232 of the pressing plate 23 of the three hydraulic cylinders in the second group of hydraulic cylinders on the clamp base 1 is adjacent to the three positioning blocks, wherein the three hydraulic cylinders in the second group of hydraulic cylinders include a common hydraulic cylinder. Figure 4 It can be seen that the two hydraulic cylinders other than the common hydraulic cylinder in the aforementioned three hydraulic cylinders in the second group of hydraulic cylinders are paired and arranged adjacent to the two hydraulic cylinders other than the common hydraulic cylinder in the first group of hydraulic cylinders, and their projected positions on the clamp base 1 are adjacent to the corresponding positioning blocks, while the projected position of the other hydraulic cylinder other than the aforementioned three hydraulic cylinders in the second group of hydraulic cylinders on the clamp base 1 is far away from the positioning block.

[0080] In addition, the turning fixture 100 may also include multiple groups of support cylinders 6, each group of support cylinders 6 including at least one support cylinder. The multiple groups of support cylinders 6 are fixed to the fixture base 1 and are arranged alternately with the multiple positioning blocks 5 on the circumference of the virtual circle where the multiple positioning blocks 5 are located, so as to selectively support the annular flange 102 located at the second end of the annular body 101 of the three-piece motor base 10 or the four-piece motor base 10'. Accordingly, for the hydraulic cylinders in the second group of hydraulic cylinders mentioned above whose projected position is far from the positioning blocks, support cylinders can be arranged near their projected positions to stably support the motor base from below.

[0081] In addition, the turning fixture 100 may further include a centering device 7, such as Figure 6 and Figure 7 As shown, a centering device 7 may be provided on the fixture base 1 for holding the three-piece motor base or the four-piece motor base at the second end of the annular body of the three-piece motor base or the four-piece motor base.

[0082] In particular, the centering device 7 may include an annular boss 71, an annular mounting plate 72 and a plurality of centering claws 73. The annular boss 71 may have a circular central through hole H and be fixed on the fixture base 1. The annular mounting plate 72 may surround the outer side of the annular boss 71 and be fixed on the fixture base 1 concentrically with the annular boss 71. In particular, the positioning block 5 and the support cylinder 6 may also be arranged on the annular mounting plate 72. A plurality of centering claws 73, such as three centering claws as shown in the figure, may be arranged above the top surface of the annular boss 71 and extend horizontally radially around the vertical center line L3 of the annular boss 71 to above the annular mounting plate 72. The vertical center line L3 of the annular boss 71 may coincide with the central axis L2 of the annular body 101 of the three-piece motor base 10 or the four-piece motor base 10'. The centering claws 73 are configured to be radially retractable to abut against or disengage from the inner surface of the annular body 101 of the three-piece motor base 10 or four-piece motor base 10 ′.

[0083] In addition, the centering device 7 may further include a circular cover plate 74 for covering the circular central through hole H of the annular boss 71 .

[0084] In particular, the circular cover plate 74 may include a plurality of inclined portions 741 at its peripheral portion, which are inclined downward from the radial inside to the radial outside, each inclined portion 741 is arranged to be aligned with the corresponding centering claw 73, and the lowest point of the inclined portion 741 is not higher than the bottom surface of the centering claw 73 in the vertical direction.

[0085] Furthermore, the inner diameter of the annular body 101 of the three-piece motor base 10 may be different from the inner diameter of the annular body 101 of the four-piece motor base 10'. Specifically, the inner diameter of the annular body 101 of the three-piece motor base 10 is smaller than the inner diameter of the annular body 101 of the four-piece motor base 10'.

[0086] refer to Figure 6 、 Figure 8 and Figure 9 The centering claw 73 may include a first positioning member 731, which includes a fixing portion 731A and a connecting portion 731B connected to each other. The first positioning member 731 is connected to the moving cylinder located in the annular boss 71 through the fixing portion 731A, and the connecting portion 731B is located above the annular mounting plate 72.

[0087] The centering claw 73 may further include a second positioning member 732 that is removably connected to the connecting portion 731B of the first positioning member 731. The radial distal end of the second positioning member 732 is further away from the central axis L2 of the annular body 101 of the three-piece motor base 10 or the four-piece motor base 10' than the radial distal end of the first positioning member 731. For example, Figure 9 As shown, three holes can be provided on the second positioning member 732, the two through holes on both sides are screw holes for receiving screws, and the non-through hole in the middle is a pin hole. Correspondingly, three similar holes are provided on the first positioning member 731. During installation, the first positioning member 731 and the second positioning member 732 can first be positioned using pins inserted into the two pin holes, and then the corresponding screw holes can be aligned and the screws can be screwed in to achieve a fixed connection between the first positioning member 731 and the second positioning member 732.

[0088] The foregoing description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are readily apparent to those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A turning fixture, wherein the turning fixture (100) is suitable for a three-piece motor base (10) and a four-piece motor base (10'), each of the three-piece motor base (10) and the four-piece motor base (10') having a cylindrical shape and comprising an annular body (101) and two annular flanges (102) respectively connected to a first end and a second end of the annular body (101) opposite to each other in an axial direction, wherein the three-piece motor base (10) is provided at the first end of the annular body (101) thereof There are three latches (A), and the three latches (A) are evenly distributed on the outer surface of the annular body (101) along the circumferential direction of the annular body (101) of the three-lever type motor base (10), and the four-lever type motor base (10') is provided with four latches (A) at the first end of its annular body (101), and the four latches (A) are evenly distributed on the outer surface of the annular body (101) along the circumferential direction of the annular body (101) of the four-lever type motor base (10'), characterized in that: The turning fixture (100) comprises: A fixture base (1), wherein the three-piece motor base (10) or the four-piece motor base (10') is uprightly placed on the fixture base (1) and the first end of the annular body (101) of the three-piece motor base (10) or the four-piece motor base (10') is located above the second end; and A plurality of hydraulic cylinders (2), wherein the plurality of hydraulic cylinders (2) are arranged on the clamp base (1), three hydraulic cylinders among the plurality of hydraulic cylinders (2) are configured as a first group of hydraulic cylinders, the first group of hydraulic cylinders can cooperate with the three levers (A) of the three-lever type motor base (10) to clamp the three-lever type motor base (10) at the first end of the annular body (101) of the three-lever type motor base (10), and four hydraulic cylinders among the plurality of hydraulic cylinders (2) are configured as a second group of hydraulic cylinders, the second group of hydraulic cylinders can cooperate with the four levers (A) of the four-lever type motor base (10') to clamp the four-lever type motor base (10') at the first end of the annular body (101) of the four-lever type motor base (10').

2. The turning fixture according to claim 1, characterized in that: The plurality of hydraulic cylinders (2) include six hydraulic cylinders, three of the six hydraulic cylinders are configured as the first group of hydraulic cylinders, four of the six hydraulic cylinders are configured as the second group of hydraulic cylinders, and the first group of hydraulic cylinders and the second group of hydraulic cylinders share one hydraulic cylinder.

3. The turning fixture according to claim 2, characterized in that: Each of the plurality of hydraulic cylinders (2) comprises: a cylinder body (21), the cylinder body (21) being fixed to the fixture base (1); a telescopic rod (22) connected to the cylinder (21) and configured to be telescopic in a vertical direction; and A pressing plate (23) includes a connecting section (231) and a pressing section (232) connected to each other, wherein the connecting section (231) is connected to the free end of the telescopic rod (22), and the pressing section (232) is configured to press the corresponding lever from above.

4. The turning fixture according to claim 3, characterized in that: The hydraulic cylinder (2) is configured to drive the pressing plate (23) to rotate around the extension axis (L1) of the telescopic rod (22).

5. The turning fixture according to claim 3 or 4, characterized in that: The pressing section (232) is located inside the connecting section (231) in the radial direction of the three-piece motor base (10) or the four-piece motor base (10') and above the connecting section (231) in the vertical direction.

6. The turning fixture according to claim 1, wherein: The turning fixture (100) further comprises: a bracket (3) connected to the clamp base (1) and extending vertically upward from the clamp base (1); and An annular connecting plate (4) is connected to the top of the bracket (3), and the plurality of hydraulic cylinders (2) are arranged on the annular connecting plate (4).

7. The turning fixture according to claim 3, characterized in that: The turning fixture (100) further comprises a plurality of positioning blocks (5), which are fixed on the fixture base (1) and are circumferentially arranged around the central axis (L2) of the annular body (101) of the three-piece motor base (10) or the four-piece motor base (10') for supporting an annular flange (102) at the second end of the annular body (101) of the three-piece motor base (10) or the four-piece motor base (10').

8. The turning fixture according to claim 7, characterized in that: The plurality of positioning blocks (5) include three positioning blocks, and the three positioning blocks are circumferentially arranged at equal intervals around the central axis (L2) of the annular main body (101) of the three-piece motor base (10) or the four-piece motor base (10'). The projection position of the pressing section (232) of the pressing plate (23) of the first group of hydraulic cylinders on the clamp base (1) is adjacent to the three positioning blocks, and The projection positions of the pressing sections (232) of the pressing plates (23) of the three hydraulic cylinders in the second group of hydraulic cylinders on the clamp base (1) are adjacent to the three positioning blocks, wherein the three hydraulic cylinders in the second group of hydraulic cylinders include the one shared hydraulic cylinder.

9. The turning fixture according to claim 7 or 8, characterized in that: The turning fixture (100) further comprises a plurality of groups of supporting cylinders (6), each group of supporting cylinders (6) comprising at least one supporting cylinder, the plurality of groups of supporting cylinders (6) being fixed on the fixture base (1) and being arranged alternately with the plurality of positioning blocks (5) on the circumference of a virtual circle where the plurality of positioning blocks (5) are located, so as to selectively support the annular flange (102) of the three-piece motor base (10) or the four-piece motor base (10') at the second end of its annular body (101).

10. The turning fixture according to claim 1, wherein: The turning fixture (100) further comprises a centering device (7), which is arranged on the fixture base (1) for holding the three-piece motor base (10) or the four-piece motor base (10') at the second end of the annular body (101) of the three-piece motor base (10) or the four-piece motor base (10').

11. The turning fixture according to claim 10, wherein: The centering device (7) comprises: an annular boss (71), the annular boss (71) having a circular central through hole (H) and being fixed on the clamp base (1); an annular mounting plate (72), the annular mounting plate (72) surrounding the outer side of the annular boss (71) and being fixed on the clamp base (1) concentrically with the annular boss (71); and A plurality of centering claws (73) are provided above the top surface of the annular boss (71) and extend radially horizontally around the vertical center line (L3) of the annular boss (71) to the top of the annular mounting plate (72), the vertical center line (L3) of the annular boss (71) coincides with the central axis (L2) of the annular body (101) of the three-piece motor base (10) or the four-piece motor base (10'), and the centering claws (73) are configured to be able to radially extend and retract to abut against the inner surface of the annular body (101) of the three-piece motor base (10) or the four-piece motor base (10') or to detach from the inner surface of the annular body (101) of the three-piece motor base (10) or the four-piece motor base (10').

12. The turning fixture according to claim 11, wherein: The centering device (7) further comprises a circular cover plate (74) for covering the circular central through hole (H) of the annular boss (71).

13. The turning fixture according to claim 12, wherein: The circular cover plate (74) includes a plurality of inclined portions (741) at its peripheral portion, which are inclined downward from the radial inner side to the radial outer side. Each of the inclined portions (741) is arranged to be aligned with the corresponding centering claw (73), and the lowest point of the inclined portion (741) is not higher than the bottom surface of the centering claw (73) in the vertical direction.

14. The turning fixture according to claim 11, wherein: The inner diameter of the annular main body (101) of the three-piece motor base (10) is different from the inner diameter of the annular main body (101) of the four-piece motor base (10').

15. The turning fixture according to claim 14, wherein: The centering claw (73) includes a first positioning member (731), the first positioning member (731) includes a fixing portion (731A) and a connecting portion (731B) connected to each other, the first positioning member (731) is connected to a moving cylinder located in the annular boss (71) through the fixing portion (731A), and the connecting portion (731B) is located above the annular mounting plate (72).

16. The turning fixture according to claim 15, wherein: The centering claw (73) also includes a second positioning member (732) removably connected to the connecting portion (731B) of the first positioning member (731), and the radial distal end of the second positioning member (732) is farther away from the central axis (L2) of the annular body (101) of the three-piece motor base (10) or the four-piece motor base (10') than the radial distal end of the first positioning member (731).

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