CN215146516U - Assembling equipment - Google Patents

Abstract

An assembly apparatus is adapted to assemble a gear to a shaft of a motor. The assembling equipment comprises a positioning frame, a pressing device and a driving device, wherein the pressing device is positioned above the positioning frame along the vertical direction, the driving device is connected with the pressing device, the pressing device comprises a pressing head, a positioning rod and a fixing group, the positioning rod can penetrate through the pressing head in a telescopic and movable mode along the vertical direction, the fixing group can fix the gear in a fixing mode, the pressing head is provided with a pressing bottom surface, the positioning rod extends along the vertical direction and protrudes out of the pressing bottom surface in a protruding mode to be sleeved with the gear, the fixing group fixes the gear to be abutted against the pressing bottom surface, and the driving device is used for driving the pressing device to move downwards along the vertical direction so that the pressing bottom surface presses the gear to be sleeved and fixed on the shaft rod. Therefore, the gear teeth of the gear can be prevented from being damaged due to pressure injury, and the shaft rod can be prevented from being damaged or even bent due to the fact that the gear is sleeved on the shaft rod.

Description

Assembling equipment

Technical Field

The present invention relates to an assembly apparatus, and more particularly to an assembly apparatus for assembling a gear to a shaft of a motor.

Background

In the process of assembling the gear on the shaft rod of the motor by the existing assembling equipment, the motor is firstly fixed by a clamping cylinder of a motor fixing mechanism. And then, sleeving the gear positioning block on the shaft lever of the motor, so that the shaft lever penetrates through the positioning hole of the gear positioning block. And then, placing the gear into the positioning hole of the gear positioning block. And then, the cylinder driving pressure head penetrates into the positioning hole and extrudes the gear, so that the shaft lever penetrates into the shaft hole of the gear. However, the aforementioned assembly method has the following drawbacks:

1. because the motor has tolerance in its external dimensions and the motor fixed by the clamping cylinder cannot move in the direction perpendicular to the axial direction of the shaft, the motor is prone to cause the position of the shaft to shift due to the tolerance, and the gear positioning block assembled on the motor and the gear assembled in the gear positioning block also shift.

2. Because a gap is formed between the inner circumferential surface of the positioning hole defined by the gear positioning block and the gear, and the two factors of the position deviation of the gear and the shaft lever cause that the center of the pressure head, the axis of the gear and the axis of the shaft lever cannot be positioned on the same axis, when the pressure head extrudes the gear to enable the gear to move in the positioning hole, the gear is easy to incline and rub against the inner circumferential surface, and the gear teeth of the gear are damaged by pressure. In addition, the gear tilt movement can easily cause the shaft to bend, resulting in motor failure or reduced output. Furthermore, damage to the teeth of the gears and bending of the shaft can cause the meshing points of the gears to shift, resulting in noise during operation of the motor.

3. The assembly equipment has many components and assembly steps, resulting in long assembly time and low assembly efficiency.

Disclosure of Invention

An object of the present invention is to provide an assembling apparatus capable of overcoming at least one of the drawbacks of the background art.

The utility model discloses an aim at and solve the background technical problem and adopt following technical scheme to realize, the foundation the utility model provides an equipment is suitable for and assembles the axostylus axostyle in the motor with the gear.

The assembling equipment comprises a positioning frame, a pressing device and a driving device, wherein the pressing device is positioned above the positioning frame along the vertical direction, the driving device is connected with the pressing device, the pressing device comprises a pressing head, a positioning rod and a fixing group, the positioning rod can penetrate through the pressing head in a telescopic and movable mode along the vertical direction, the fixing group can fix the gear in a fixing mode, the pressing head is provided with a pressing bottom surface, the positioning rod extends along the vertical direction and protrudes out of the pressing bottom surface in a protruding mode to be sleeved with the gear, the fixing group fixes the gear to be abutted against the pressing bottom surface, and the driving device is used for driving the pressing device to move downwards along the vertical direction so that the pressing bottom surface presses the gear to be sleeved and fixed on the shaft rod.

The utility model discloses an equipment, the fixing group adsorbs through the non-contact force the gear.

The utility model discloses an equipment, fixing group including set up in the magnet of pressure head, magnet passes through magnetic force and adsorbs the gear.

The utility model discloses an equipment, fixing group including set up in push down the absorption hole of bottom surface, the absorption hole passes through vacuum suction and adsorbs the gear.

The utility model discloses an equipment, the gear is formed with and is used for supplying the axostylus axostyle with the shaft hole that the locating lever was worn to establish, the locating lever is worn to stretch to length in the shaft hole is less than the length in shaft hole.

The utility model discloses an assembly equipment, the motor is formed with the perforation, the locating rack includes the edge the upper and lower direction is extended and is used for wearing to locate fenestrate locating pin, fenestrate aperture is greater than the external diameter of locating pin, the gear has and is located the chamfer face of shaft hole bottom, the chamfer face can supply the axostylus axostyle contact.

The utility model discloses an equipment, the fixing group including a plurality of set up in the pressure head just is located the elastic component in the locating lever outside, the elastic component is used for the centre gripping the gear.

The utility model discloses an equipment, the perpendicular to is followed to the elastic component minimum interval that the transverse direction of upper and lower direction was got is less than the external diameter of gear.

The utility model discloses an equipment, each the elastic component contains soft elastic sheath, the elastic component passes through respectively the elastic sheath centre gripping the gear.

The utility model discloses an equipment, each the elastic component contain connect in the bullet arm of pressure head, and the cover is located the elastic sheath of bullet arm, play the arm have connect in the connecting arm section of pressure head, by the connecting arm section inboard is close to down and court the last sloping arm section that locating lever direction slope extends, and by last sloping arm section bottom down and keeping away from down the sloping arm section that locating lever direction slope extends, the elastic sheath cover is located down the sloping arm section with go up the partly of sloping arm section, the elastic sheath is along the perpendicular to minimum interval that the horizontal direction of up-down direction was got is less than the external diameter of gear.

The utility model discloses an equipment, compression fittings still including set up in be used for right in the pressure head the spring of elasticity is applyed downwards to the locating lever.

The beneficial effects of the utility model reside in that: by means of the mode that the motor and the gear are respectively positioned by the positioning frame and the pressing device, the gear teeth of the gear can be prevented from being damaged by pressure injury, and the shaft rod can be prevented from being damaged or even bent in the process that the shaft rod is sleeved by the gear. Therefore, the motor can be ensured to normally operate under the condition of maintaining stable output power, and the noise generated in the operation process of the motor can be prevented. In addition, the number of components of the assembling equipment is small, the assembling steps are simple, the assembling working hours can be greatly reduced, and the assembling efficiency can be effectively improved.

Drawings

Fig. 1 is a front view of a first embodiment of the assembly apparatus of the present invention and a motor and a gear, illustrating the connection relationship between the motor, the gear, a frame, a positioning frame, a pressing device and a driving device;

FIG. 2 is a fragmentary exploded perspective view of the first embodiment with the motor;

FIG. 3 is a fragmentary top view of the first embodiment and the motor, illustrating a locating pin of the locating bracket passing through a through hole of the motor;

FIG. 4 is an exploded perspective view of the pressing device and the gear according to the first embodiment;

FIG. 5 is a fragmentary cross-sectional view of the first embodiment and the motor and gear illustrating the motor and gear positioned on the positioning frame and the pressing device, respectively;

FIG. 6 is a fragmentary cross-sectional view of the first embodiment and the motor and gear illustrating the pressing device pressing the gear onto a shaft of the motor;

fig. 7 is a cross-sectional view of the pressing device of the second embodiment of the assembling apparatus of the present invention;

FIG. 8 is a cross-sectional view taken along line VIII-VIII of FIG. 7;

fig. 9 is a cross-sectional exploded view of the pressing device and the gear of the third embodiment of the assembling apparatus of the present invention; and

fig. 10 is a cross-sectional view of the laminating device and the gear according to the third embodiment.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples.

Referring to fig. 1, a first embodiment of the assembling apparatus 300 of the present invention is adapted to assemble a gear 1 to a motor 2. The assembling apparatus 300 includes a frame 3, a positioning frame 4, a pressing device 5, and a driving device 6. For convenience of description, a first transverse direction X, a second transverse direction Y perpendicular to the first transverse direction X, and an up-down direction Z perpendicular to the first transverse direction X and the second transverse direction Y of the assembling apparatus 300 are defined. The first lateral direction X is exemplified by the front-rear direction, and the second lateral direction Y is exemplified by the left-right direction.

Referring to fig. 1, 2 and 3, the motor 2 includes a main body 21, a shaft 22 protruding from the top of the main body 21 and extending in the vertical direction Z, and a connecting plate 23 fixedly disposed on the top of the main body 21. The connecting plate 23 has two protrusions 231 protruding out of the left and right sides of the body 21, respectively, and each protrusion 231 is formed with a through hole 232. The frame 3 includes a base 31 and a supporting frame 32 disposed on the top surface of the base 31. The positioning frame 4 is fixedly disposed on the top surface of the base 31 and includes a lower bearing surface 41, an upper bearing surface 42, and a positioning pin 43. The lower supporting surface 41 is used for supporting the body 21. The upper supporting surface 42 is located at the right side of the lower supporting surface 41 and has a height in the vertical direction Z higher than that of the lower supporting surface 41, and the upper supporting surface 42 is used for supporting the corresponding protrusion 231. The positioning pin 43 is disposed on the upper carrying surface 42 and extends along the vertical direction Z to pass through the corresponding through hole 232. In the first embodiment, the through hole 232 is circular, and the positioning pin 43 is cylindrical, and the diameter of the through hole 232 is slightly larger than the outer diameter of the positioning pin 43. Thereby, the motor 2 can be translated within a certain range with respect to the positioning pin 43 on a two-dimensional plane space formed by the first and second lateral directions X and Y.

Referring to fig. 1, 4 and 5, the gear 1 is formed with a shaft hole 11 extending along the vertical direction Z for the shaft 22 of the motor 2 to pass through. The gear 1 has a chamfered surface 12 at the bottom end of the shaft hole 11. The gear 1 of the first embodiment is made of a magnetic conductive material that can be magnetically attracted by a magnet.

The pressing device 5 is disposed in the carrying frame 32 and located above the positioning frame 4 along the vertical direction Z, and the pressing device 5 includes a pressing head 51, a positioning rod 53, a spring 54, and a holding assembly 50. The pressing head 51 includes an upper housing 511, a lower housing 512, and two screws 513. The upper case 511 is formed with an upper receiving hole 514, and four screw holes 515 around the outer circumference of the upper receiving hole 514. The lower shell 512 has a connecting plate 516 and a compression leg 517. The connection plate 516 is formed with a lower receiving hole 518 communicating with the upper receiving hole 514, two first through holes 519 respectively located at the front and rear sides of the lower receiving hole 518, and two second through holes 520 respectively located at the left and right sides of the lower receiving hole 518. The pressing pillar 517 is protruded from the bottom surface of the connecting plate 516 and has a pressing bottom surface 521. The compression leg 517 and the connection plate 516 define an opening 522 extending upward from the bottom pressing surface 521 and communicating with the lower accommodating hole 518, and the diameter of the opening 522 is smaller than that of the lower accommodating hole 518. Each screw 513 is inserted through a corresponding first through hole 519 and screwed into a corresponding screw hole 515 to lock the connection plate 516 of the lower shell 512 to the bottom end of the upper shell 511.

The positioning rod 53 includes a piston 531 and a rod 532. The piston 531 is inserted into the upper accommodation hole 514 and the lower accommodation hole 518 of the ram 51 so as to be capable of extending and contracting in the vertical direction Z. The rod 532 is connected to the piston 531 and protrudes out of the bottom end of the piston 531, and the rod 532 extends along the vertical direction Z and is inserted through the opening 522 in a manner of being capable of moving telescopically along the vertical direction Z. A portion of the rod 532 protrudes out of the pressing bottom surface 521 to be inserted into the shaft hole 11 for the gear 1 to be sleeved.

The spring 54 is a compression spring disposed in the upper accommodating hole 514, and the upper and lower ends thereof respectively abut against the upper shell 511 and the piston 531 to apply downward elastic force to the positioning rod 53, so that the positioning rod 53 can be maintained at an initial position as shown in fig. 5. At this time, the piston 531 abuts against the connecting plate 516 and the rod 532 partially protrudes out of the pressing bottom surface 521.

The holding assembly 50 includes two magnets 55, each magnet 55 is disposed in a corresponding second through hole 520 and can be adhered to the connecting pad 516 by adhesive, and each magnet 55 is a strong magnet for example. The magnet 55 is configured to attract the gear 1 by a non-contact force such as a magnetic force to position the gear 1 against the depressed bottom surface 521.

Referring to fig. 1 and 5, the driving device 6 includes a cylinder 61 and a connecting frame 62. The cylinder 61 is provided on the carriage frame 32. The connecting frame 62 is disposed at the bottom end of the cylinder 61 and is fastened to the upper shell 511 of the ram 51 by, for example, a screw fastening method. The air cylinder 61 of the driving device 6 is used to drive the pressing device 5 to move downward along the up-down direction Z, so that the pressing head 51 presses the gear 1 to be fixed on the shaft 22. The air cylinder 61 is further configured to drive the pressing device 5 to move upward along the up-down direction Z, so as to reset the pressing device 5.

The following describes in detail how the assembly apparatus 300 assembles the gear 1 to the shaft 22 of the motor 2:

referring to fig. 2, 3 and 5, first, one of the protrusions 231 of the motor 2 is sleeved on the positioning pin 43 of the positioning frame 4, so that the positioning pin 43 is inserted into the through hole 232 of the protrusion 231. When the body 21 of the motor 2 and the corresponding protrusion 231 abut against the lower supporting surface 41 and the upper supporting surface 42, respectively, the assembly of the motor 2 is completed.

Referring to fig. 4 and 5, next, the gear 1 is sleeved on the rod 532 of the positioning rod 53 at a position protruding out of the bottom pressing surface 521, so that the rod 532 is inserted into the shaft hole 11 and the top end of the gear 1 abuts against the bottom pressing surface 521. The magnetic force generated by the magnet 55 attracts the gear 1, so that the top end of the gear 1 can tightly abut against the bottom pressing surface 521 and is positioned on the bottom pressing surface 521. Thereby, the gear 1 can be prevented from sliding downward due to its own weight and slipping out of the lever 532. The length L1 of the rod 532 of the positioning rod 53 extending into the axial hole 11 of the gear 1 is smaller than the length L2 of the axial hole 11, so as to ensure that the lower half portion of the axial hole 11 of the gear 1 positioned on the bottom pressing surface 521 can be first abutted with the shaft 22 during the process that the subsequent driving device 6 (shown in fig. 1) drives the pressing device 5 to move downwards along the up-down direction Z.

Referring to fig. 1, 5 and 6, the cylinder 61 is driven to operate, so that the cylinder 61 drives the pressing device 5 and the gear 1 to move downward through the connecting frame 62. Because the lower half part of the shaft hole 11 can be butted with the shaft rod 22 firstly in the downward moving process of the gear 1, when the shaft rod 22 of the motor 2 and the shaft hole 11 are positioned on the same axis and are accurately butted, the shaft rod 22 can directly extend into the shaft hole 11. By applying a downward pressure to the gear 1 through the pressing bottom surface 521 during the downward movement of the pressing head 51, the gear 1 can be moved downward along the shaft 22 against the friction force with the shaft 22.

When the bottom end of the rod 532 of the positioning rod 53 contacts and is stopped by the top end of the shaft 22, the positioning rod 53 moves upward relative to the ram 51 and compresses the spring 54 to deform it and accumulate a return spring force. That is, when the lever 532 contacts the shaft 22 and the pressing bottom surface 521 of the pressing head 51 gradually presses the gear 1, the lever 532 is pushed by the shaft 22 and gradually moves away from the shaft hole 11. Therefore, the rod 532 can be prevented from directly transmitting the downward pressure of the ram 51 to the shaft 22, so that the shaft 22 is prevented from being damaged or even bent.

When the pressing device 5 moves down to a pressing position shown in fig. 6, the cylinder 61 stops. At this time, the shaft 22 is inserted into the shaft hole 11 and the two are coupled together by interference fit, so that the gear 1 is fixedly sleeved on the shaft 22. At the same time, the rod 532 of the positioning rod 53 is completely removed from the shaft hole 11.

Finally, the air cylinder 61 drives the pressing device 5 to move upward through the connecting frame 62 and return to the position shown in fig. 1. Since the friction between the shaft 22 and the gear 1 is greater than the magnetic force of the magnet 55, when the cylinder 61 drives the pressing device 5 to move upward and return through the connecting frame 62, the pressing bottom surface 521 of the pressing column 517 can smoothly move away from the gear 1 fixed on the shaft 22. When the rod 532 moves away from the shaft 22 during the upward movement, the restoring elastic force accumulated by the spring 54 will spring the positioning rod 53 downward to restore it to the initial position, so as to provide the next gear 1 to be sleeved. At this time, the assembly of the gear 1 to the shaft 22 of the motor 1 is completed.

It should be noted that, when the motor 1 cannot be aligned with the axis of the shaft hole 11 of the gear 1 due to the deviation of the axis of the shaft 22 caused by the tolerance of the external dimensions, the chamfered surface 12 of the gear 1 contacts with the top edge of the shaft 22. Because the positioning pin 43 and the corresponding through hole 232 are connected in a manner that the motor 2 can translate in a certain range relative to the positioning pin 43 in a two-dimensional plane space formed by the first transverse direction X and the second transverse direction Y, a component force applied to the top edge of the shaft rod 22 when the chamfered surface 12 of the gear 1 contacts the top edge of the shaft rod 22 pushes the shaft rod 22 to promote the motor 2 to translate in the two-dimensional plane space, so that the gear 1 can simultaneously play a role in guiding the shaft rod 22 to enable the axis of the shaft rod 22 and the axis of the shaft hole 11 to be located on the same axis in the downward movement process. Therefore, the position deviation of the shaft 22 of the motor 1 can be absorbed, so as to ensure that the gear 1 can be sleeved on the shaft 22 in a collimation manner and prevent the shaft 22 from being bent in the process of sleeving the gear 1 on the shaft 22.

Since the gear 1 is sleeved on the rod 532 and is attracted by the magnetic force of the magnet 55 to be positioned on the bottom pressing surface 521, the outer peripheral surface of the gear 1 does not contact and rub against other components in the process of assembling the gear 1 on the shaft 22. Therefore, the gear teeth of the gear 1 can be prevented from being damaged due to pressure injury. In addition, by the connection between the positioning pin 43 and the corresponding through hole 232, the position deviation of the shaft 22 of the motor 1 can be absorbed to ensure that the gear 1 can be sleeved on the shaft 22 in a collimating manner, and the shaft 22 can be prevented from being damaged or even bent in the process of sleeving the gear 1 on the shaft 22 by matching with the manner that the positioning rod 53 can move in an up-and-down telescopic manner. Therefore, the motor 1 can be ensured to normally operate under the condition of maintaining stable output power, and the noise generated in the operation process of the motor 1 can be prevented.

On the other hand, compared with the assembling apparatus of the background art, the assembling apparatus 300 can omit the components such as the clamping cylinder and the gear positioning block, so that the assembling process can be simplified. Therefore, the assembling working hours can be greatly reduced, and the assembling efficiency can be effectively improved.

The number of magnets 55 in the first embodiment may be one or two or more, and is not limited to two.

Referring to fig. 7 and 8, a second embodiment of the assembling apparatus 300 of the present invention has a structure substantially the same as that of the first embodiment, except that the holding assembly 50 holds the gear 1.

In the second embodiment, the holding assembly 50 includes an absorption hole 523 recessed upward from the bottom pressing surface 521 and annularly surrounding the outer periphery of the opening 522, an air suction hole 524 communicating with the absorption hole 523, a communication pipe 525 communicating with the air suction hole 524, and an air suction pump 526 communicating with the communication pipe 525. When the suction pump 526 is operated to perform suction, the suction hole 523 generates a non-contact force such as a vacuum suction force to suck the gear 1, so as to position the gear 1 against the depressed bottom surface 521.

In addition, since the friction force between the shaft 22 (as shown in fig. 6) and the gear 1 is greater than the vacuum suction force of the suction hole 523, when the air cylinder 61 drives the pressing device 5 to move upward and return through the connecting frame 62 (as shown in fig. 1), the pressing bottom surface 521 of the pressing column 517 can smoothly move away from the gear 1 sleeved on the shaft 22.

Referring to fig. 9, a third embodiment of the assembling apparatus 300 of the present invention has an overall structure substantially the same as that of the first embodiment, except for the way of holding the gear 1 by the holding set 50.

In the third embodiment, the holding assembly 50 includes a plurality of elastic members 56 disposed on the pressing head 51 and outside the positioning rods 53. The number of the elastic pieces 56 is two, for example, and the elastic pieces are located on the left and right sides of the positioning rod 53 in the second lateral direction Y. Each of the elastic members 56 includes an elastic arm 561 and an elastic sheath 562. The spring arm 561 is made of metal and has a connecting arm section 563 abutting on the bottom surface of the connecting plate 516 of the lower case 512, an upper inclined arm section 564 extending obliquely downward from the inner side of the connecting arm section 563 toward the positioning rod 53, and a lower inclined arm section 565 extending obliquely downward from the bottom end of the upper inclined arm section 564 toward the positioning rod 53. The connecting arm section 563 is formed with a through hole 566 communicating with the corresponding second through hole 520. The ram 51 further comprises two screws 513 ', each screw 513' passing through the corresponding through hole 566 and the corresponding second through hole 520 and being screwed into the corresponding screw hole 515 to lock the corresponding connecting arm segment 563 to the bottom surface of the connecting plate 516. The elastic sheath 562 is made of a soft material with elasticity, such as silicon rubber or rubber, and is disposed on the lower inclined arm section 565 and a portion of the upper inclined arm section 564. A minimum spacing S of the elastic sheaths 562 of the elastic elements 56 taken along the second transverse direction Y is smaller than an outer diameter D of the gear wheel 1.

Referring to fig. 9 and 10, in the process of sleeving the gear 1 on the portion of the rod 532 protruding out of the lower pressing bottom surface 521, since the outer diameter D is greater than the minimum distance S, the top edge of the gear 1 contacts the portion of the elastic sheath 562 corresponding to the lower inclined arm section 565 first. The force component applied by the top edge of the gear 1 to the portion of the elastic sheath 562 corresponding to the lower inclined arm segment 565 will cause the upper inclined arm segment 564 to bend and deform outwards relative to the connecting arm segment 563 and accumulate elastic force, so that the gear 1 can stretch the elastic sheath 562 outwards. When the top end of the gear 1 abuts against the bottom pressing surface 521, the elastic sheath 562 can be clamped on the outer peripheral surface of the gear 1 by the elastic force accumulated by the upper inclined arm segment 564, so as to position the gear 1 against the bottom pressing surface 521. The elastic piece 56 can avoid clamping the outer peripheral surface of the gear 1 by clamping the outer peripheral surface of the gear 1 through the elastic sheath 562.

In addition, since the friction force between the shaft 22 (as shown in fig. 6) and the gear 1 is greater than the clamping force of the elastic element 56, when the air cylinder 61 drives the pressing device 5 to move upward and return through the connecting frame 62 (as shown in fig. 1), the pressing bottom surface 521 of the pressing column 517 can smoothly move away from the gear 1 sleeved on the shaft 22.

In summary, the assembling apparatus 300 according to the embodiments can prevent the gear teeth of the gear 1 from being damaged due to pressure injury by the way of positioning the motor 2 and the gear 1 respectively by the positioning frame 4 and the pressing device 5, and can prevent the shaft 22 from being damaged or even bent during the process of sleeving the shaft 22 with the gear 1. Therefore, the motor 1 can be ensured to normally operate under the condition of maintaining stable output power, and the noise generated in the operation process of the motor 1 can be prevented. In addition, the number of components of the assembly device 300 is small, the assembly steps are simple, the assembly time can be greatly reduced, the assembly efficiency can be effectively improved, and the purpose of the utility model can be really achieved.

Claims (11)

1. An assembly apparatus (300) adapted to assemble a gear (1) to a shaft (22) of a motor (2); the method is characterized in that:

the assembling equipment (300) comprises a positioning frame (4), a pressing device (5) located above the positioning frame (4) along the vertical direction (Z), and a driving device (6) connected with the pressing device (5), wherein the pressing device (5) comprises a pressing head (51), a positioning rod (53) capable of passing through the pressing head (51) in a telescopic and movable manner along the vertical direction (Z), and a fixing and holding group (50) capable of fixing the gear (1), the pressing head (51) is provided with a pressing bottom surface (521), the positioning rod (53) extends along the vertical direction (Z) and protrudes out of the pressing bottom surface (521) for the gear (1) to be sleeved, the fixing and holding group (50) fixes the gear (1) to be abutted against the pressing bottom surface (521), the driving device (6) is used for driving the pressing device (5) to move downwards along the vertical direction (Z), so that the pressing bottom surface (521) presses the gear (1) downwards to be fixedly sleeved on the shaft rod (22).

2. The assembly apparatus of claim 1, wherein: the holding group adsorbs the gear through a non-contact force.

3. The assembly apparatus of claim 2, wherein: the holding group comprises a magnet arranged on the pressure head, and the magnet adsorbs the gear through magnetic force.

4. The assembly apparatus of claim 2, wherein: the fixing and holding assembly comprises an adsorption hole arranged on the bottom surface of the pressing device, and the adsorption hole adsorbs the gear through vacuum suction.

5. The assembly apparatus of claim 1, wherein: the gear is provided with a shaft hole for the shaft lever and the positioning lever to penetrate through, and the length of the positioning lever penetrating into the shaft hole is smaller than that of the shaft hole.

6. The assembly apparatus of claim 5, wherein: the motor is formed with the perforation, the locating rack includes along the upper and lower direction extends and is used for wearing to locate the fenestrate locating pin, fenestrate aperture is greater than the external diameter of locating pin, the gear has the chamfer face that is located the shaft hole bottom, the chamfer face can supply the axostylus axostyle contact.

7. The assembly apparatus of claim 1, wherein: the fixing and holding assembly comprises a plurality of elastic pieces which are arranged on the pressure head and positioned on the outer side of the positioning rod, and the elastic pieces are used for clamping the gear.

8. The assembly apparatus of claim 7, wherein: the minimum distance of the elastic member taken along a transverse direction perpendicular to the up-down direction is smaller than the outer diameter of the gear.

9. The assembly apparatus of claim 7, wherein: each elastic piece comprises a soft elastic sheath, and the elastic pieces clamp the gear through the elastic sheaths respectively.

10. The assembly apparatus of claim 7, wherein: each elastic component contain connect in the bullet arm of pressure head, and the cover is located the elastic sheath of bullet arm, play the arm have connect in the connecting arm section of pressure head, by the connecting arm section inboard is down and towards being close to the last sloping arm section that the locating lever direction slope extends, and by last sloping arm section bottom down and towards keeping away from the lower sloping arm section that the locating lever direction slope extends, the elastic sheath cover is located down sloping arm section with go up a part of sloping arm section, the elastic sheath is along the perpendicular to minimum interval that the horizontal direction of up-down direction was got is less than the external diameter of gear.

11. The assembly apparatus according to any one of claims 1 to 10, characterized in that: the pressing device further comprises a spring which is arranged in the pressure head and used for applying elastic force to the positioning rod downwards.

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