CN115446747A

CN115446747A - Clamp apparatus

Info

Publication number: CN115446747A
Application number: CN202211123784.8A
Authority: CN
Inventors: 陈晓奇; 何诚
Original assignee: Zhuhai Sanrui Precision Technology Co ltd
Current assignee: Zhuhai Sanrui Precision Technology Co ltd
Priority date: 2022-09-15
Filing date: 2022-09-15
Publication date: 2022-12-09
Anticipated expiration: 2042-09-15
Also published as: CN115446747B

Abstract

The invention provides a clamp, which is provided with a placing space and comprises a first clamping piece and a second clamping piece; the first clamping piece comprises a first clamping part, the first clamping part comprises a first groove, and the first groove faces the placing space; the second clamping piece comprises a second clamping part, the second clamping part comprises a second groove, and the second groove faces the placing space; the first groove and the second groove are communicated to form a fin clamping position; the first clamping piece can rotate around the rotation axis relative to the second clamping piece. When the clamp provided by the invention clamps the motor shell, the first clamping piece and the second clamping piece which rotate relatively clamp the heat dissipation fins of the motor shell placed in the fin clamping positions. In the radial direction of the motor shell, the clamp can not apply acting force to the motor shell, so that the deformation of the motor shell can not be caused.

Description

Clamp apparatus

Technical Field

The invention relates to the technical field of machining, in particular to a clamp.

Background

When the axial end face of the motor housing is subjected to surface processing, a clamp is required to clamp the motor housing, and specifically, some motor housings include a plurality of heat dissipation fins which are protruded from the outer peripheral surface of a main body and are arranged along the circumferential direction of the motor housing, in addition to the cylindrical main body. When the clamp is used, a motor is placed in the clamping space, after the clamping pieces move along the radial direction and approach the clamping space, heat dissipation fins on the motor are gradually inserted into the grooves until the abutting surface abuts against the outer peripheral surface of the main body, and the clamping pieces apply clamping force to the main body of the motor shell along the radial direction.

The direction of the force that this kind of anchor clamps of current applied motor housing is motor housing's radial, and the clamp force that anchor clamps were applied can lead to motor housing's main part to produce deformation, simultaneously because the shell of motor is provided with heat radiation fins, the cooperation area between motor housing and the anchor clamps is less, and clamping stability is low, the location accuracy is low.

Disclosure of Invention

The invention aims to provide a clamp which can avoid deformation of a motor shell, improve the clamping fit area, and improve the clamping stability and positioning accuracy.

In order to achieve the above object, the present invention provides a clamp having a placing space, the clamp including a first clamping member and a second clamping member; the first clamping piece comprises a first clamping part, the first clamping part comprises a first groove, and the first groove faces the placing space; the second clamping piece comprises a second clamping part, the second clamping part comprises a second groove, and the second groove faces the placing space; the first groove and the second groove are communicated to form a fin clamping position; the first clamping piece can rotate around the rotation axis relative to the second clamping piece.

According to the scheme, the radiating fins of the motor can be inserted into the fin clamping positions, when the first groove rotates relative to the second groove, the radiating fins of the motor shell are clamped tightly by the inner wall surface of the first groove and the inner wall surface of the second groove, radial acting force cannot be generated on the motor shell when the radiating fins of the motor shell are clamped tightly, meanwhile, the contact area between the two surfaces of the first groove, the second groove and the radiating fins is larger, and the clamping is more stable and reliable.

According to the scheme, the number of the first clamping pieces is one, the number of the second clamping pieces is multiple, and the first grooves and the second grooves are arranged at intervals; or the number of the second clamping pieces is one, the number of the first clamping pieces is multiple, and the first grooves and the second grooves are arranged at intervals; or the first clamping pieces are multiple, the second clamping pieces are multiple, and the first grooves and the second grooves are arranged alternately.

Therefore, the first clamping pieces and the second clamping pieces which are arranged at intervals can provide larger clamping area when the heat dissipation fins are clamped tightly, the clamping stability of the clamp is improved, meanwhile, the stress of the heat dissipation fins is more uniform when the clamping area is increased, and the heat dissipation fins are not easy to damage.

According to the scheme, the clamp further comprises a positioning block; the distance between the positioning block and the rotating shaft center is adjustable.

Therefore, the motor shell placed in the placing space can be concentric with the axis of the first clamping piece by adjusting the distance between the positioning block and the rotating axis.

According to a further aspect of the above disclosure, each of the first clamping members includes a plurality of first grooves, and the plurality of first grooves are arranged along a circumferential direction of the rotation axis; and/or each second clamping piece comprises a plurality of second grooves which are arranged along the circumferential direction of the rotating shaft center.

Therefore, the first grooves and/or the second grooves can clamp the radiating fins, a larger clamping area is provided, meanwhile, the radiating fins are clamped simultaneously, so that the stress of the motor shell is more uniform, and the damage to the motor shell is minimum while the clamping stability is improved.

According to the scheme, the inner circumferential surface of the first clamping part is an arc surface, the inner circumferential surface of the second clamping part is an arc surface, and the inner circumferential surface of the first clamping part and the inner circumferential surface of the second clamping part are positioned on the same arc surface; the first groove is sunken in the inner circumferential surface of the first clamping part; the second groove is recessed in the inner peripheral surface of the second clamping portion.

Therefore, the inner circumferential surfaces of the first clamping part and the second clamping part are cambered surfaces, so that the first clamping part and the second clamping part are more adaptive to the shape of the motor shell, the first groove and the second groove which are as many as possible are clamped and matched with the plurality of radiating fins, the inner circumferential surface of the first clamping part and the inner circumferential surface of the second clamping part are positioned on the same cambered surface, and after the radiating fins are inserted into the first groove and the second groove, the matching areas among the first groove, the second groove and the radiating fins are maximized.

According to a further aspect of the above solution, the first clamping member includes a first sliding fit portion, the second clamping member includes a second sliding fit portion, and the first sliding fit portion is in sliding fit with the second sliding fit portion; the first sliding fit part is an arc-shaped groove, and the second sliding fit part is an arc-shaped bulge; or the second sliding fit part is an arc-shaped groove, and the first sliding fit part is an arc-shaped bulge.

Therefore, the first sliding fit part is in sliding fit with the second sliding fit part, so that the rotating precision of the first clamping piece is higher, and the rotating axis position of the first clamping piece is fixed.

According to the scheme, the first clamping piece further comprises a limiting groove; the fixture further comprises a limiting piece, the limiting piece is fixedly connected with the second clamping piece, and the limiting piece is in limiting fit with the limiting groove in the rotating direction of the first clamping piece.

Therefore, the limiting part is in limiting fit with the limiting groove, so that the first clamping part can be prevented from rotating excessively to damage the motor shell.

According to a further aspect of the above solution, the first clamping member further comprises a reset groove; the clamp further comprises a reset rod and an elastic piece, the reset rod is fixedly connected with the second clamping piece, and two ends of the elastic piece are respectively abutted against the inner wall surface of the reset groove and the outer peripheral surface of the reset rod; when the first clamping piece rotates along the first rotating direction, the elastic piece stores energy.

Therefore, the reset mechanism can enable the first clamping piece to automatically return to the initial position, the elastic piece is arranged in the reset groove and does not occupy the external space of the first clamping piece, the first clamping piece and the second clamping piece can be attached to each other, and the fit clearance between the first groove and the second groove which are communicated with each other is smaller.

According to the scheme, the clamp further comprises a first positioning piece; and/or the clamp further comprises a second positioning element; the placing space and the first positioning piece are sequentially arranged along the extending direction of the rotating shaft center, the first positioning piece can move to a first position, and when the first positioning piece is located at the first position, the distance between the first positioning piece and the placing space is a first preset distance; the placing space and the second positioning piece are sequentially arranged along the extending direction of the rotating shaft center; the second positioning piece can move to a second position, and when the second positioning piece is located at the second position, the distance between the second positioning piece and the placing space is a second preset distance.

Therefore, the arrangement of the first positioning piece and the second positioning piece can position the installation position of the motor shell in the clamp, and the motor shell is ensured to be accurately placed at a specified position; and when anchor clamps drive motor housing together upset, first telescopic link and second telescopic link can play certain bearing effect to motor housing.

Drawings

Fig. 1 is a structural diagram of a first view of a first embodiment of a fixture according to the present invention.

Fig. 2 is a structural diagram of the first clamping apparatus of the present invention from a first view after the second clamping member is removed.

Fig. 3 is an exploded view of a first embodiment of the clamp of the present invention.

Fig. 4 is a first perspective view of the first embodiment of the clamp of the present invention without the side clamping members.

FIG. 5 is a second perspective view of the first embodiment of the clamping apparatus of the present invention.

Fig. 6 is a partial cross-sectional view of a first embodiment of a clamp of the present invention.

FIG. 7 is a block diagram of a rotating clamp according to a first embodiment of the clamp of the present invention.

Fig. 8 is a structural view of an intermediate clamp member according to a first embodiment of the clamp of the present invention.

Fig. 9 is a structural view of a second holding member of the first embodiment of the jig of the invention.

Fig. 10 is a partially enlarged view of a point a in fig. 4.

Fig. 11 is a partial enlarged view at B in fig. 1.

Fig. 12 is a partial enlarged view at C in fig. 5.

Fig. 13 is a partial enlarged view at D in fig. 5.

Fig. 14 is a partial enlarged view at E in fig. 1.

Fig. 15 is a schematic view showing a change in the operating state of the first groove and the second groove in the first embodiment of the jig of the present invention.

Fig. 16 is a schematic view showing a change in the operating state of the first groove and the second groove in the second embodiment of the jig of the present invention.

Fig. 17 is a schematic view showing a change in the operating state of the first groove and the second groove in the third embodiment of the jig of the present invention.

The invention is further described with reference to the following figures and examples.

Detailed Description

The first embodiment is as follows:

referring to fig. 1, a first perspective view of an embodiment of the present invention is shown. With reference to fig. 1 to 3, the clamp includes a rotating clamping member 1, a lateral clamping member 2, a middle clamping member 3, a base 4, a first cylinder 5, a second cylinder 6, a first telescopic rod 7, a second telescopic rod 8, a first supporting rod 501, a second supporting rod 502, a first connecting rod 901, a second connecting rod 902, a limiting member 903, a positioning block 907, and a spring 904. The first telescopic rod 7 is a first positioning member of this embodiment, and the second telescopic rod 8 is a second positioning member of this embodiment. The rotating clamping member 1 is a first clamping member of this embodiment, and the side clamping members 2 and the middle clamping member 3 are second clamping members of this embodiment. A unified three-dimensional coordinate system is established on each drawing, wherein the upper part is in the positive direction of the Z axis, and the lower part is in the negative direction of the Z axis.

Referring to fig. 1 and 2, along the negative direction of the Y axis, the side clamping member 2, the rotating clamping member 1, the middle clamping member 3, the rotating clamping member 1, the side clamping member 2, the first telescopic rod 7 and the second telescopic rod 8 are sequentially arranged. The side holder 2 that sets gradually, rotate holder 1, middle holder 3, rotate the interior week of holder 1 and side holder 2 and form placing space 905 jointly, and placing space 905 is used for placing motor housing 906. Two second cylinders 6 are located the ascending relative both sides of X axle side of base 4 respectively, and two second cylinders 6 can drive first telescopic link 7 and second telescopic link 8 respectively and be close to or keep away from and place space 905 direction and be concertina movement, and first telescopic link 7 can move to the primary importance, and second telescopic link 8 can move to the secondary importance. In the Y-axis direction, the projection of the first position coincides with the projection of the placement space 905, the projection of the second position coincides with the projection of the placement space 905, and the placement space 905, the first position, and the second position are sequentially arranged along the Y-axis negative direction.

Referring to fig. 1 and 2, the middle clamping member 3 is fixedly connected to the base 4, the two side clamping members 2 are respectively fixedly connected to the middle clamping member 3, the rotating clamping member 1 located between the side clamping member 2 and the middle clamping member 3 can rotate around its rotation axis relative to the side clamping member 2 and the middle clamping member 3, and the extension direction of the rotation axis is the Y-axis direction. The two first cylinders 5 are respectively positioned on two opposite sides of the base 4 in the X-axis direction; the first 501 and second 502 struts are both T-shaped struts. The two first cylinders 5 can drive the first and

second struts

501 and 502 to move along the Z-axis direction, respectively.

Referring to fig. 7, the rotating clamp 1 includes a first clamping portion 101 and a driven portion 102. The first clamping portion 101 is an arc-shaped structure, and along the X-axis direction, the extending two ends of the first clamping portion 101 are respectively provided with a driven portion 102, and the first clamping portion 101 is used for clamping the motor housing 906 to be processed. The driven part 102 includes a connecting groove 1021 and connecting protrusions 1022, two connecting protrusions 1022 are oppositely disposed in each connecting groove 1021, the connecting protrusions 1022 are arc-shaped protrusions, an extending direction of a connecting line of the two connecting protrusions 1022 is a Z-axis direction, and an extending direction of an axis of the arc-shaped surface of the arc-shaped protrusion is a Y-axis direction.

Referring to fig. 1, 5 and 7, the extending end of the t-shaped strut includes a cross member in a rectangular parallelepiped shape, the extending direction of the cross member is the Y-axis direction, the cross member is located in the connecting recess 1021, and the upper and lower surfaces of the cross member are respectively in contact with a corresponding connecting protrusion 1022. When the first supporting rod 501 moves along the Z-axis direction, the beam of the first supporting rod 501 can drive the corresponding driven portion 102 to move along the Z-axis direction, so as to drive the rotating clamping member 1 to rotate around the rotating axis. When the first supporting rod 501 moves upwards, the corresponding second supporting rod 502 moves downwards, and then the rotating clamping piece 1 is driven to rotate along the second rotating direction; when the first strut 501 moves downwards, the corresponding second strut 502 moves upwards, which in turn drives the rotating gripper 1 to rotate in the first direction of rotation. Because the moving direction of the first supporting rod 501 and the second supporting rod 502 is the Z-axis direction, when the first supporting rod 501 and the second supporting rod 502 drive the rotating clamping piece 1 to rotate around the rotating axis, the surfaces of the cross beams of the first supporting rod 501 and the second supporting rod 502 are in rolling fit with the cambered surface of the connecting protrusion 1022, so that the phenomenon that the first supporting rod 501 and the second supporting rod 502 are interfered with each other and cannot act with the rotating clamping piece 1 can be avoided, meanwhile, the linear acting force applied to the rotating clamping piece 1 by the first supporting rod 501 and the second supporting rod 502 can be easily converted into the rotating acting force, and the rotating clamping piece 1 can rotate more smoothly.

In this embodiment, select for use the cylinder as power supply simple structure, the safety and stability of anchor clamps, only need external air supply on the cylinder can drive actuating cylinder, make this anchor clamps need not to use live equipment, and cutting fluid sputters and triggers electrical fault on the anchor clamps when effectively preventing to process motor housing. Meanwhile, on the premise that the rotating movement angle and the movement distance of the rotating clamping piece 1 of the clamp are small, the position in contact with the first supporting rod 501 or the second supporting rod 502 is set to be an arc surface bulge with a roughly semicircular section, and the effect of smoothly converting linear driving force into rotating force is ingeniously achieved.

Referring to fig. 7, the first clamping portion 101 includes a first recess 1011, a first slip fit portion 1012, a first bypass groove 1013, a first arcuate channel 1014, a second arcuate channel 1015, and a stop groove 1016. The first arcuate channel 1014 is the first channel of the present embodiment. The second arc-shaped through groove 1015 is a reset groove of the embodiment. A plurality of first recesses 1011 set gradually along the circumference of first clamping part 101 to a plurality of first recesses 1011 are located the inner periphery of first clamping part 101, and a plurality of first recesses 1011 are on same arc, the centre of a circle of this arc is located the central line of placing space 905, the extending direction of first recess 1011 is the Y axle direction, the arc line part that a plurality of first recesses 1011 were located is the first arc line section of this embodiment, the first groove 1013 evenly distributed of dodging of five U-shapes is on first arc line section, include a plurality of first recesses 1011 that set gradually between two adjacent first dodging grooves 1013. Along the Y-axis direction, two surfaces of the first clamping portion 101 are provided with first sliding fit portions 1012 in a mirror image manner, the first sliding fit portions 1012 are arc-shaped grooves recessed in the Y-axis direction of the first clamping portion 101, and the arc-shaped grooves are located on the periphery of the first arc line segment. Three first arc-shaped through grooves 1014, two second arc-shaped through grooves 1015 and one limiting groove 1016 are arranged on the first sliding fit portion 1012, the three first arc-shaped through grooves 1014 are uniformly distributed on the first sliding fit portion 1012, and the communication directions of the first arc-shaped through grooves 1014, the second arc-shaped through grooves 1015 and the limiting groove 1016 are Y-axis directions.

Referring to fig. 9, the side clamp 2 includes a second clamping portion 201. The second clamping portion includes a second groove 2011, a second sliding fit portion 2012, a second avoiding groove 2013, a first mounting hole 2014, a limiting member mounting hole 2015 and a second mounting hole 2016. A plurality of second recesses 2011 are arranged in sequence along the inner periphery of the second clamping portion 201, a plurality of second recesses 2011 are located on the same arc line, the extending direction of the second recesses 2011 is the Y-axis direction, the arc line portion where the plurality of second recesses 2011 are located is the second arc line segment of the embodiment, the five U-shaped second avoidance grooves 2013 are evenly distributed on the second arc line segment, and a plurality of second recesses 2011 arranged in sequence are included between two adjacent second avoidance grooves 2013. Along the Y-axis direction, a second sliding fit portion 2012 is disposed on the surface of the second clamping portion 201, and the second sliding fit portion 2012 is an arc-shaped protrusion protruding from the surface of the second clamping portion 201 along the Y-axis direction, and the arc-shaped protrusion is located at the outer periphery of the second arc segment. Three second mounting holes 2016, two first mounting holes 2014 and a locating part mounting hole 2015 are arranged on the second sliding fit portion 2012, the three second mounting holes 2016 are uniformly distributed on the second sliding fit portion 2012, and the extending directions of the second mounting holes 2016, the first mounting holes 2014 and the locating part mounting holes 2015 are Y-axis directions.

Referring to fig. 8, the intermediate clamp 3 includes a third clamp portion 301. The third clamping portion 301 includes a third groove 3011, a third slide-fit portion 3012, a third avoiding groove 3013, a mounting through hole 3014, a third mounting hole 3015, and a fourth mounting hole 3016. A plurality of third recess 3011 set gradually and a plurality of third recess 3011 are located same arc along the circumference of third clamping part 301, and the extending direction of third recess 3011 is the Y axle direction, and the arc part that a plurality of third recess 3011 are located is the third arc line section of this embodiment, and five U-shaped third dodge groove 3013 evenly distributed is on the second arc line section, includes a plurality of third recesses 3011 that set gradually between two adjacent third dodge grooves 3013. Along the Y-axis direction, the surface of the third clamping portion 301 is provided with a third sliding fit portion 3012, the third sliding fit portion 3012 is an arc protrusion protruding from two surfaces of the third clamping portion 301 along the Y-axis direction, the arc protrusion is located on the periphery of the third arc segment, and the two arc protrusions are arranged in a mirror image manner. The third sliding fit portion 3012 is provided with three mounting through holes 3014, two third mounting holes 3015 and a fourth mounting hole 3016, the three mounting through holes 3014 are uniformly distributed on the third sliding fit portion 3012, and the extending directions of the mounting through holes 3014, the third mounting holes 3015 and the fourth mounting holes 3016 are Y-axis directions.

Referring to fig. 6 and 11, the side clamping member 2, the rotating clamping member 1, the middle clamping member 3, the rotating clamping member 1, and the side clamping member 2 are sequentially arranged along the Y-axis forward direction. The first groove 1011, the second groove 2011, and the third groove 3011 have the same shape and size in cross section in the Y-axis direction. The first avoidance groove 1013, the second avoidance groove 2013, and the third avoidance groove 3013 have the same shape and size in cross section in the Y-axis direction. Along the Y-axis forward direction, the second groove 2011, the first groove 1011, the third groove 3011, the first groove 1011 and the second groove 2011 which are arranged in sequence are opposite in position and are communicated with each other to form the fin clamping position of the embodiment. The second avoidance groove 2013, the first avoidance groove 1013, the third avoidance groove 3013, the first avoidance groove 1013, and the second avoidance groove 2013, which are arranged in sequence along the Y-axis direction, are opposite in position and are communicated with each other.

Referring to fig. 2 and 3, two extending ends of the first connecting rod 901 are respectively located in two second mounting holes 2016 opposite to each other in the Y-axis direction, and the first connecting rod 901 sequentially passes through the first arc-shaped through groove 1014, the mounting through hole 3014 and the first arc-shaped through groove 1014, and when the rotating clamping member 1 rotates around the rotation axis thereof, the first connecting rod 901 can slide in the first arc-shaped through groove 1014 along the arc line where the first arc-shaped through groove 1014 is located.

Referring to fig. 2 and fig. 3, two extending ends of the second connecting rod 902 are respectively located in the first mounting hole 2014 and the third mounting hole 3015 which are opposite to each other in the Y-axis direction, and the second connecting rod 902 passes through the second arc through groove 1015 of the rotating clamping member 1, two extending ends of the spring 904 respectively abut against the inner wall surface of the second arc through groove 1015 and the outer peripheral surface of the second connecting rod 902, when the rotating clamping member 1 rotates around the rotating axis, the second connecting rod 902 can slide along the arc line where the second arc through groove 1015 is located in the second arc through groove 1015, when the rotating clamping member 1 rotates along the first rotating direction, the spring 904 compresses stored energy, and when the spring 904 releases the stored energy, the rotating clamping member 1 can be driven to rotate along the second rotating direction. The second connecting rod 902 is a reset rod of the present embodiment.

Referring to fig. 2 and 3, two extending ends of the limiting element 903 are respectively located in the limiting element mounting hole 2015 and the fourth mounting hole 3016 which are opposite to each other in the Y-axis direction, and the limiting element 903 passes through the limiting groove 1016 of the rotating clamping element 1, so that when the rotating clamping element 1 rotates around the rotation axis thereof, the limiting element 903 and the limiting groove 1016 are in limiting fit in the rotation direction of the rotating clamping element 1.

Referring to fig. 2 and 6, the side holder 2, the rotating holder 1, the middle holder 3, the rotating holder 1, and the side holder 2 are sequentially arranged in the Y-axis forward direction. The second sliding fit portion 2012 is in sliding fit with the first sliding fit portion 1012, the first sliding fit portion 1012 is in sliding fit with the third sliding fit portion 3012, the third sliding fit portion 3012 is in sliding fit with the first sliding fit portion 1012, and the first sliding fit portion 1012 is in sliding fit with the second sliding fit portion 2012. The axes of the arcs where the first sliding fit portion 1012, the second sliding fit portion 2012 and the third sliding fit portion 3012 are located are the same, and the axes are the rotation axes of the rotating clamping piece 1, and the extending direction of the rotation axes is the Y-axis direction.

Referring to fig. 1, 4 and 14, a positioning block mounting position 908 is disposed at a position of the side clamping member 2 corresponding to each of the second avoiding grooves 2013, the positioning block mounting position 908 is disposed at an outer periphery of the second avoiding groove 2013, a positioning block 907 made of rubber or other soft materials is disposed in each of the positioning block mounting positions 908, the positioning block 907 includes an adjusting through groove 9071 and an adjusting through hole (not shown) which penetrate through the positioning block 907, and inner contours of the adjusting through groove 9071 and the adjusting through hole are long. The positioning block 907 is placed in the positioning block mounting position 908, and the fixing bolt passes through the adjusting through hole and then is matched with the screw hole of the side clamping piece 2, so that the positioning block 907 is mounted on the side clamping piece 2, and at the moment, the head of the fixing bolt is located in the adjusting through groove 9071. Because the thread section of the fixing bolt is located in a long adjusting through hole and the head of the fixing bolt is located in a long adjusting through groove 9071, the positioning block 907 can move in the positioning block mounting position 908 under the condition that the fixing bolt does not press the positioning block 907.

When the clamp of the embodiment is used for clamping the motor shell 906, the position of the positioning block 907 is adjusted firstly, so that the axis of the motor shell 906 is concentric with the rotating axis of the rotating clamping piece 1 when the motor shell 906 is placed in the placing space 905; then, the motor housing 906 is inserted into the placement space 905 along the negative Y-axis direction, wherein each heat dissipation fin 9061 of the motor housing 906 is inserted into the corresponding second groove 2011, first groove 1011, third groove 3011, first groove 1011, and second groove 2011 in sequence. Each bolt connecting seat 9062 of the motor housing 906 is sequentially inserted into the corresponding second avoidance groove 2013, the first avoidance groove 1013, the third avoidance groove 3013, the first avoidance groove 1013, and the second avoidance groove 2013, the outer peripheral surface of the bolt connecting seat 9062 abuts against the surface of the positioning block 906 in the insertion process, and the positioning block supports the motor housing 906, so that the heat dissipation fins 9061 of the motor housing 906 do not touch the inner wall surfaces of the first groove 1011, the second groove 2011, and the third groove 3011. In addition, before the motor housing 906 is inserted into the placing space 905, the second telescopic rod 8 is moved to the second position, and then the motor housing 906 is inserted into the placing space 905 so that the extending end of the motor housing 906 abuts against the second telescopic rod 8; referring to fig. 5 and 13, the distance between the second telescopic rod 8 and the side clamping member 2 is a second preset distance. At this time, the first cylinder 5 located on the negative direction of the X axis drives the first strut 501 to move towards the negative direction of the Z axis, the first cylinder 5 located on the positive direction of the X axis drives the second strut 502 to move towards the positive direction of the Z axis, the first strut 501 applies a driving force towards the negative direction of the Z axis to the corresponding connecting protrusion 1022, and the second strut 502 applies a driving force towards the positive direction of the Z axis to the corresponding connecting protrusion 1022; with reference to fig. 10 and fig. 15, under the driving of the two first cylinders 5, the rotating holder 1 rotates along the first rotation direction, the rotating holder 1 and the side holder 2 that rotate relatively and the rotating holder 1 and the middle holder 3 that rotate relatively clamp the motor housing 906, the inner wall of the first recess 1011 faces the heat sink fins 9061 and applies a clamping force in the first rotation direction, and the second recess 2011 and the third recess 3011 apply a clamping force in the second rotation direction to the heat sink fins 9061 and clamp the heat sink fins 9062. With reference to fig. 5 and 12, after the end surface of one end of the motor housing 906 abutting against the second telescopic rod 8 is cut by a lathe, the first telescopic rod 7 is moved to the first position, at this time, the outer peripheral surface of the first telescopic rod 7 just contacts the extending end of the motor housing, the distance between the first telescopic rod 7 and the side edge clamping member 2 is a first preset distance, and the second preset distance is greater than the first preset distance. When a force is applied to the other extending end of the motor housing 906 in the negative Y-axis direction for processing, the first telescopic rod 7 can ensure that the position of the motor housing 906 in the Y-axis direction is unchanged.

The clamp provided by the embodiment can provide a larger clamping area when clamping a columnar object with fins, such as the motor shell 906, and the like, and improves the clamping stability. While the clamping force is applied in the rotational direction without causing deformation of the motor housing 906. By adjusting the position of the positioning block 907, the position of the object to be processed in the placing space 905 can be accurately adjusted, the motor shell is concentric with the axis of the clamp when the clamp clamps the motor shell, and the processing precision is improved. First telescopic link 7 and second telescopic link 8 can be fixed a position motor housing 906 in the circumference of anchor clamps, and when anchor clamps drive motor housing 906 together upset, first telescopic link 7 and second telescopic link 8 can play certain supporting effect to motor housing 906.

Example two:

referring to fig. 16, in the present embodiment, the first grooves 13 and the second grooves 14 are sequentially and alternately arranged, and the fin clamping position formed by communicating the first grooves 13 and the second grooves 14 is arranged at an inclination angle with the axis of the clamp, so that a larger clamping area and a better clamping effect can be obtained when clamping the motor housing having the heat dissipation fins 22 arranged in an inclined manner.

Example three:

referring to fig. 17, in the present embodiment, the plurality of first grooves 15 and the plurality of second grooves 16 are alternately arranged in sequence, and the fin clamping positions formed by communicating the first grooves 15 and the second grooves 16 are V-shaped, so that a larger clamping area and a better clamping effect can be obtained when clamping the motor housing having the V-shaped heat dissipation fins 23. Of course the fin clamp may also include a plurality of continuous V-shaped structures.

Finally, it should be emphasized that the above-described preferred embodiments of the present invention are merely examples of implementations, rather than limitations, and that many variations and modifications of the invention are possible to those skilled in the art, without departing from the spirit and scope of the invention.

Claims

1. A clamp is provided with a placing space and comprises a first clamping piece and a second clamping piece;

the first clamping piece comprises a first clamping part, the first clamping part comprises a first groove, and the first groove faces the placing space;

the second clamping piece comprises a second clamping part, the second clamping part comprises a second groove, and the second groove faces the placing space;

the method is characterized in that:

the first groove and the second groove are communicated to form a fin clamping position;

the first clamping piece can rotate around the rotating axis of the first clamping piece relative to the second clamping piece.

2. The clamp of claim 1, wherein:

the number of the first clamping pieces is one, the number of the second clamping pieces is multiple, and the first grooves and the second grooves are arranged at intervals;

or the number of the second clamping pieces is one, the number of the first clamping pieces is multiple, and the first grooves and the second grooves are arranged at intervals;

or the first clamping pieces are multiple, the second clamping pieces are multiple, and the first grooves and the second grooves are arranged at intervals.

3. The clamp of claim 2, wherein:

the clamp comprises a first connecting rod;

the second clamping pieces are relatively fixed through first connecting rods, each first clamping piece comprises a first through groove, each first connecting rod is located in the corresponding first through groove, and the first connecting rods can slide in the corresponding first through grooves.

4. A clamp as claimed in any one of claims 1 to 3, wherein:

the clamp further comprises a positioning block, and the positioning block is arranged towards the placing space;

the distance between the positioning block and the rotating shaft center is adjustable.

5. A clamp as claimed in any one of claims 1 to 3, wherein:

each first clamping piece comprises a plurality of first grooves which are arranged along the circumferential direction of the rotating shaft center;

and/or each second clamping piece comprises a plurality of second grooves which are arranged along the circumferential direction of the rotating shaft center.

6. A clamp as claimed in any one of claims 1 to 3, wherein:

the inner peripheral surface of the first clamping part is an arc surface, the inner peripheral surface of the second clamping part is an arc surface, and the inner peripheral surface of the first clamping part and the inner peripheral surface of the second clamping part are positioned on the same arc surface;

the first groove is sunken in the inner circumferential surface of the first clamping part;

the second groove is recessed in the inner circumferential surface of the second clamping portion.

7. A clamp as claimed in any one of claims 1 to 3, wherein:

the first clamping piece comprises a first sliding fit part, the second clamping piece comprises a second sliding fit part, and the first sliding fit part is in sliding fit with the second sliding fit part;

the first sliding fit part is an arc-shaped groove, and the second sliding fit part is an arc-shaped bulge; or the second sliding fit part is an arc-shaped groove, and the first sliding fit part is an arc-shaped bulge.

8. A clamp as claimed in any one of claims 1 to 3, wherein:

the first clamping piece further comprises a limiting groove;

the fixture further comprises a limiting piece, the limiting piece is fixedly connected with the second clamping piece, and the limiting piece is in limiting fit with the limiting groove in the rotating direction of the first clamping piece.

9. A clamp as claimed in any one of claims 1 to 3, wherein:

the first clamping piece further comprises a reset groove;

the clamp further comprises a reset rod and an elastic piece, the reset rod is fixedly connected with the second clamping piece, and two ends of the elastic piece are respectively abutted against the inner wall surface of the reset groove and the outer peripheral surface of the reset rod;

when the first clamping piece rotates along a first rotating direction, the elastic piece stores energy.

10. A clamp as claimed in any one of claims 1 to 3, wherein:

the clamp further comprises a first positioning piece; the placing space and the first positioning piece are sequentially arranged along the extending direction of the rotating shaft center, the first positioning piece can move to a first position, and when the first positioning piece is located at the first position, the distance between the first positioning piece and the placing space is a first preset distance;

and/or the clamp further comprises a second positioning element; the placing space and the second positioning piece are sequentially arranged along the extending direction of the rotating shaft center; the second positioning part can move to a second position, and when the second positioning part is located at the second position, the distance between the second positioning part and the placing space is a second preset distance.