CN116214114A - Gear bushing press-fitting machine - Google Patents

Abstract

The invention provides a gear bushing press-fitting machine, and belongs to the technical field of press-fitting equipment. The problem of low gear and bushing press-fitting precision in the prior art is solved. The gear bushing press-fitting machine comprises a frame and a first power source arranged on the frame, wherein a pressing rod is arranged on an output shaft of the first power source, a radially raised step part is arranged on the outer wall of the pressing rod, a guide sleeve and an elastic limiting part are respectively sleeved on the pressing rod, the guide sleeve is pressed on the step part downwards by the elastic limiting part, an annular guide part is downwards extended from the bottom of the guide sleeve, a containing groove for accommodating a bushing is formed between the inner peripheral surface of the annular guide part, the outer peripheral surface of the pressing rod and the lower end surface of the step part in a surrounding manner, and a plurality of elastic telescopic parts which can radially stretch and press the bushing on the annular guide part are arranged on the pressing rod along the circumferential direction. The invention has the advantage of ensuring the press-fitting precision of the gear bushing.

Description

Gear bushing press-fitting machine

Technical Field

The invention belongs to the technical field of press mounting equipment, and relates to a gear bushing press-mounting machine.

Background

At present, the press mounting of gears and bushings usually adopts a manual press mounting machine to carry out auxiliary operation, and as disclosed in China patent literature, the manual press mounting machine comprises a base, an upright post and a press mounting device, wherein the upright post is vertically arranged on the base, the middle part of the upright post is provided with the press mounting device, the base is provided with a plurality of limit rings, the press mounting device comprises a fixing plate, an upper mold core and a rocker, one end of the fixing plate is fixed on the upright post, the other end of the fixing plate downwards extends to form an upper mold core through hole, the other end of the fixing plate backwards extends to form a hollow cylindrical upper mold core fixing post, a spring is arranged in the upper mold core fixing post, one end of the upper mold core is fixed in the upper mold core fixing post after penetrating through the spring, one end of the upper mold core is connected with the upper mold core through hole, the middle part of the upper end of the fixing plate is movably connected with the rocker through a screw, and one side of the screw is provided with a limit spring. When the manual press-fitting machine is used, the bushing cannot be directly sleeved on the upper mold core for press-fitting, but the end part of the bushing is required to be pre-fitted in the inner hole of the gear, then the gear pre-fitted with the bushing is placed in the limit ring of the base of the manual press-fitting machine, so that the bushing is opposite to the upper mold core, and then the upper mold core moves downwards to continuously extrude the bushing to push the bushing to continuously move downwards until the bushing is completely pressed into the mounting position of the inner hole of the gear, and the conventional press-fitting mode of the gear and the bushing can finish press-fitting of the gear and the bushing, but has the following defects: the manual press-fitting machine needs to pre-install the end part of the bushing in the inner hole of the gear when in use, concentricity of the bushing and the gear pre-installed in the inner hole of the gear after loosening hands cannot be guaranteed, press-fitting precision is low, furthermore, referring to fig. 11, the inner hole of the gear to be press-fitted comprises a big hole and a small hole which are communicated up and down, and the installation position of the bushing is positioned on the small hole, namely the bushing needs to be press-fitted on the inner side wall of the small hole, so that the difficulty of press-fitting of the bushing is further increased, and the press-fitting precision cannot be guaranteed.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides a gear bushing press-fitting machine. The technical problem solved by the invention is how to ensure the press-fitting precision of the gear bushing.

The aim of the invention can be achieved by the following technical scheme:

the gear bushing press-fitting machine comprises a frame and a first power source arranged on the frame, and is characterized in that a pressing rod is arranged on an output shaft of the first power source, a radially raised step part is arranged on the outer wall of the pressing rod, a guide sleeve and an elastic limiting piece are respectively sleeved on the pressing rod, the guide sleeve is pressed on the step part in a downward pushing mode by the elastic limiting piece, an annular guide part is arranged at the bottom of the guide sleeve in a downward extending mode, a containing groove for accommodating a bushing is formed in a surrounding mode between the inner peripheral surface of the annular guide part, the outer peripheral surface of the pressing rod and the lower end face of the step part, and a plurality of elastic telescopic pieces which can stretch in the radial direction and press the bushing on the annular guide part are arranged on the pressing rod in the circumferential direction.

During press fitting, the bushing is sleeved on the pressure rod and is positioned in the accommodating groove, after the hand is loosened, the elastic telescopic piece on the pressure rod can press the bushing against the annular guide part to prevent the bushing from falling, the annular guide part can play a role of external support, the elastic telescopic piece can play a role of internal support, thereby positioning the bushing in the accommodating groove, then the gear to be processed is placed under the pressure rod, concentricity of the pressure rod, the guide sleeve, the annular guide part and the inner hole of the gear is ensured, during press fitting, after the guide sleeve is abutted against the top of the gear, the guide sleeve cannot continuously move downwards along with the pressure rod, after the pressure rod is driven by the first power source, the elastic limiting piece is continuously moved downwards, meanwhile, the step part of the pressure rod pushes the bushing to synchronously move downwards, and the radial pushing force of the elastic telescopic piece is always received in the process of downward movement of the bushing, so that position deviation and inclination cannot occur in the process of downward movement of the bushing, after the bushing is pressed in place, the gear can not be separated from the gear in the process of the pressing and the positioning of the bushing, and the press fitting precision of the bushing can be ensured.

In the gear bushing press machine, the side wall of the pressing rod is provided with the telescopic cavity along the radial direction, the elastic telescopic piece comprises a spring arranged along the length direction of the telescopic cavity, one end of the spring is fixedly connected with the bottom wall of the telescopic cavity, the other end of the spring is fixedly provided with a steel ball, and the spring presses the steel ball against the edge of the cavity opening of the telescopic cavity to enable the steel ball to be partially exposed out of the telescopic cavity. When the bushing is sleeved into the compression bar from bottom to top, under the action of external force, the bushing can squeeze the steel balls and compress the spring to enable the bushing to smoothly enter the accommodating groove, after the external force is removed, the steel balls press the bushing against the annular guide part under the action of the restoring force of the spring, so that the bushing does not fall off, and the bushing cannot be taken away from the gear inner hole in the process of returning of the compression bar after the bushing is pressed in place.

In the gear bushing press-fitting machine, a positioning seat for positioning the gear is further arranged on the frame, a guide block capable of extending into an inner hole of the gear is penetrated and arranged in the positioning seat, a second power source is further arranged on the frame, an output shaft of the second power source is connected with the guide block and can drive the guide block to move up and down along the inner hole of the positioning seat, and the guide block, the positioning seat and the compression bar are concentrically arranged in the vertical direction. When the downward movement of the compression bar is changed into slow downward movement (i.e. working state), the guide block is always in butt joint with the compression bar and guides the downward movement of the compression bar, so that the position deviation of the compression bar in the downward movement process can be avoided, the press mounting precision of the gear bushing is further ensured, and further, the guide block, the positioning seat and the compression bar are concentrically arranged in the vertical direction, and the press mounting precision of the gear bushing can be further ensured.

In the gear bushing press-fitting machine, the annular positioning part used for radial limiting of the gear is arranged at the top of the positioning seat, the limiting ring part capable of forming axial limiting with the positioning seat is arranged at the bottom of the guide block, and the chamfer I is arranged at the top of the guide block. The annular positioning part can better position the gear, avoids gear to take place the position offset at the pressure equipment in-process, and spacing ring part can restrict the upward movement height of guide block for the hole of locating seat can just be exposed to the chamfer at guide block top, and the top of guide block sets up the chamfer and can avoid playing the interference to the pushing down of bush, also can guide the bottom of bush better to get into the space between chamfer and the gear hole, thereby further guarantee the pressure equipment precision of gear bush.

In the gear bushing press-fitting machine, the inner wall of the guide sleeve is provided with the convex ring part which can form limit fit with the step part, the compression bar is provided with the annular groove at the position opposite to the convex ring part, one end of the elastic limiting part is fixedly connected with the convex ring part, the other end of the elastic limiting part is fixedly connected with the groove bottom of the annular groove, and when the compression bar is pressed in place, the edge of the notch of the annular groove is abutted against the top of the guide sleeve. When the edge of the notch of the annular groove is abutted against the top of the guide sleeve, the compression bar cannot move downwards again, the bushing is also just pressed on the inner hole of the gear, the space between the annular groove and the convex ring part can be used for accommodating the compressed elastic limiting part, and the elastic limiting part is prevented from being crushed and cannot reset.

In the gear bushing press machine, the step portion is an annular protrusion extending along the radial direction, a chamfer II is arranged at the bottom of the pressing rod, the edge of the notch of the annular groove is a plane, and the top surface of the guide sleeve is a plane. The bottom of depression bar is provided with chamfer two, and the bush breaks away from the depression bar when being convenient for press mounting, also can play the effect of guide, and the pressure equipment power that step portion provided is more even to can be better with the bush indentation gear hole, the border of ring channel notch is the plane, the top surface of uide bushing is the plane, the depression bar of being convenient for leans on with the guide bushing, and when the border of ring channel notch and the top surface looks butt of uide bushing, the depression bar can't continue the downwardly moving again, and the bush is also just pressed the dress on the hole of gear, thereby further guarantees the pressure equipment precision of gear bush.

In the above-mentioned gear bushing pressure equipment machine, still be provided with in the frame and be used for placing the rotatory feed bin device of waiting to press the dress bush and be used for gear bushing assembly unloading and bush material loading's second manipulator, rotatory feed bin device includes carousel and drive carousel pivoted cam divider, the carousel has a plurality of storage stations that are used for placing waiting to press the dress bush along circumference equipartition, the second manipulator includes a pair of arm that can open and shut, and the inboard of two arms is provided with the grip block that has the step face respectively, and the opposite face of two grip blocks is arc form, and the diameter that lies in step face top part formation is greater than its diameter that lies in step face below part formation after two grip blocks fold. Above-mentioned structure can realize the automatic feeding of bush, and two arms are behind the centre gripping bush, and the grip block makes there is the clearance between bush and the arm to in the arm centre gripping bush of being convenient for from bottom to top ground card goes into the storage tank, simultaneously, the upper portion and the bush phase-match of grip block, the lower part and the gear phase-match of grip block make the centre gripping that the second manipulator can be used for gear and bush simultaneously, thereby make the automatic feeding of second manipulator can realize the bush and the automatic unloading of gear bush assembly.

In the gear bushing press-fitting machine, the rack is further provided with the controller and a third power source electrically connected with the controller, the storage station is columnar and sleeved with the pushing block, the rack is further provided with a plurality of first displacement sensors, the first displacement sensors are distributed on two sides of the storage station and are arranged along the length direction of the storage station, the plurality of first displacement sensors are used for generating displacement signals of the bushings on the storage station, the controller can control the third power source to drive the pushing block to lift along the storage station according to the displacement signals of the bushings, and the controller can also control the opening and closing of the cam divider according to the displacement signals of the bushings. After the lining on the storage station of the material taking position is taken out, the cam divider controls the rotary table to rotate so that the next storage station enters the material taking position, and each time the lining on the storage station of the material taking position is taken away, the third power source can drive the pushing block to rise, the rising distance is the thickness of one lining, the height position of the uppermost lining of the storage station is ensured to be unchanged all the time, so that the second manipulator clamps the lining, when the number of the lining in the storage bin is lower than 20, the equipment prompts feeding, but the equipment still continues to work until the lining is used up to stop working.

In the gear bushing press-fitting machine, the three-color lamp electrically connected with the controller is further arranged on the rack, the pressure sensor for generating a pressure lever pressure signal in the press-fitting process and the displacement sensor II for generating a pressure lever displacement signal in the press-fitting process are arranged on the first power source, and the controller can control the first power source to drive the pressure lever to reset or control the three-color lamp to alarm according to the pressure lever pressure signal and the pressure lever displacement signal. The structure can prompt the operation personnel to perform manual intervention in time when the bushing is not pressed in place, thereby ensuring the pressing precision of the gear bushing.

In the gear bushing press machine, a pair of second slide rails are arranged on the frame along the up-down direction, the compression bar comprises a connecting portion connected with the output shaft of the first power source and a pressure head portion detachably connected with the connecting portion, the step portion and the elastic telescopic piece are both located on the pressure head portion, and two sides of the compression bar connecting portion are respectively arranged on the two second slide rails in a sliding mode. The structure enables the compression bar to ascend and descend along the second sliding rail, so that the compression of the compression head part to the elastic limiting part is guaranteed to be uniformly downward, the compression bar can be further prevented from being displaced in the moving process, the press mounting precision of the gear bushing is further guaranteed, and in addition, the compression bar comprises a connecting part and the compression head part, and the compression bar is convenient to disassemble and assemble.

Compared with the prior art, the gear bushing press-fitting machine has the advantages that: this positioning seat, the depression bar, the uide bushing, annular guide part and guide block are the concentric setting in vertical orientation, during the pressure equipment, first with the bush suit on the depression bar and make the bush be located the storage tank, annular guide part can play the effect of outer support, the elastic expansion piece can play the effect of inner support, thereby fix a position the bush in the storage tank, at the pressure equipment in-process, after the top looks butt of uide bushing and gear, the uide bushing can't follow the depression bar and continue to move downwards, at the same time, the step portion of depression bar promotes the bush and moves downwards simultaneously after the compression elastic limiting piece of the drive of first power supply, still receive the radial thrust of elastic expansion piece all the time at the in-process that the bush moved downwards, so the bush can not take place position offset and slope at the in-process that moves downwards, after the bush pressure equipment is put in place, because the elastic expansion piece can radially flexible, so the in-process of return can not take the bush from the pressure equipment position of gear hole, thereby make this gear bush pressure equipment ability guarantee the pressure equipment precision of gear bush.

Drawings

Fig. 1 is a schematic perspective view of the present gear bushing press.

Fig. 2 is a schematic perspective view of a part of a frame removed by the present gear bushing press.

Fig. 3 is a schematic perspective view of a positioning seat, a pressing rod, a guide block and a second power source of the gear bushing press.

Fig. 4 is a cross-sectional view of the positioning block, the pressing rod, the guide block and the second power source of the present gear bushing press.

Fig. 5 is a partial enlarged view at a in fig. 4.

FIG. 6 is a cross-sectional view of a positioning seat, a compression bar, a guide block and a second power source when the gear bushing press is press-fitted.

Fig. 7 is a partial enlarged view at B in fig. 6.

Fig. 8 is a schematic perspective view of a rotary magazine device and a second manipulator of the present gear bushing press.

Fig. 9 is a schematic perspective view of a first conveyor chain assembly of the present gear bushing press.

Fig. 10 is a schematic perspective view of a laser marking machine, a first manipulator and a second manipulator of the gear bushing press.

Fig. 11 is a sectional view of a gear in the background art.

In the figure, 1, a rack; 2. a first power source; 3. a positioning seat; 31. an annular positioning part; 4. a compression bar; 41. a connection part; 42. a press head part; 43. an annular groove; 44. a step portion; 45. chamfering II; 5. a guide sleeve; 51. a convex ring portion; 6. an elastic limiting piece; 7. an annular guide part; 8. a receiving groove; 9. an elastic expansion piece; 91. a telescopic chamber; 92. a spring; 93. steel balls; 10. a guide block; 101. a limit ring part; 102. chamfering I; 11. a second power source; 12. a rotating bin device; 121. a turntable; 122. a cam divider; 123. a storage station; 13. a second manipulator; 131. a mechanical arm; 132. a clamping block; 14. a third power source; 15. a pushing block; 16. a displacement sensor I; 17. a tri-color lamp; 18. a second slide rail; 19. a gear; 20. a bushing; 21. a laser marking machine; 22. a first conveyor chain assembly; 23. a second conveyor chain assembly; 24. a first manipulator; 25. a guide rod; 26. a positioning plate; 27. a third cylinder; 28. a first guide rail; 29. a first sliding plate; 30. a rotating frame; 32. a rotary cylinder II; 33. grabbing a first manipulator; 34. a carriage; 35. a fixing frame; 36. a rotary cylinder III; 37. grabbing a second manipulator; 38. a track member; 39. and rotating the first cylinder.

Detailed Description

The following are specific embodiments of the present invention and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.

1-10, including frame 1 and the first power supply 2 of setting on frame 1, be provided with depression bar 4 on the output shaft of first power supply 2, have radial bellied step portion 44 on the outer wall of depression bar 4, be equipped with uide bushing 5 and elastic limiting part 6 on the depression bar 4 respectively, and elastic limiting part 6 pushes down uide bushing 5 on step portion 44, the bottom downwardly extending of uide bushing 5 has annular guide part 7, encloses between the inner peripheral surface of annular guide part 7, the outer peripheral surface of depression bar 4 and the lower terminal surface of step portion 44 and is formed with the holding groove 8 that is used for supplying bush 20 to hold, just depression bar 4 is provided with a plurality of elastic telescoping pieces 9 that can radially stretch out and draw back and can press bush 20 on annular guide part 7 along circumference. Specifically, the side wall of the compression bar 4 is provided with a telescopic cavity 91 along the radial direction, the elastic telescopic member 9 includes a spring 92 disposed along the length direction of the telescopic cavity 91, one end of the spring 92 is fixedly connected with the bottom wall of the telescopic cavity 91, the other end of the spring 92 is fixedly provided with a steel ball 93, and the spring 92 presses the steel ball 93 against the edge of the cavity opening of the telescopic cavity 91 so that the steel ball 93 is partially exposed out of the telescopic cavity 91. Further, a convex ring portion 51 capable of forming limit fit with the step portion 44 is disposed on the inner wall of the guide sleeve 5, the press rod 4 is provided with an annular groove 43 at a position opposite to the convex ring portion 51, one end of the elastic limiting piece 6 is fixedly connected with the convex ring portion 51, the other end of the elastic limiting piece is fixedly connected with the groove bottom of the annular groove 43, and when the press rod 4 is pressed in place, the edge of the notch of the annular groove 43 is abutted against the top of the guide sleeve 5. The step part 44 is an annular bulge extending along the radial direction, a chamfer angle II 45 is arranged at the bottom of the compression bar 4, the edge of the notch of the annular groove 43 is a plane, and the top surface of the guide sleeve 5 is a plane.

During press fitting, the bushing 20 is sleeved on the pressure rod 4 and is positioned in the accommodating groove 8, after the hand is loosened, the elastic telescopic piece 9 on the pressure rod 4 can press the bushing 20 against the annular guide part 7, so that the bushing 20 does not fall off, the annular guide part 7 can play the role of external support, the elastic telescopic piece 9 can play the role of internal support, thereby positioning the bushing 20 in the accommodating groove 8, then the gear 19 to be processed is placed under the pressure rod 4, concentricity of the inner holes of the pressure rod 4, the guide sleeve 5, the annular guide part 7 and the gear 19 is ensured, during press fitting, after the guide sleeve 5 abuts against the top of the gear 19, the guide sleeve 5 cannot continuously move downwards along with the pressure rod 4, the pressure rod 4 continuously moves downwards after the elastic limiting piece 6 is compressed under the drive of the first power source 2, meanwhile, the step part 44 of the pressure rod 4 pushes the bushing 20 to synchronously move downwards, during the downward movement of the bushing 20, the radial thrust of the elastic telescopic piece 9 is still always received, and the position of the bushing 20 cannot deviate in the process of moving downwards, the gear 19 is not pressed along the radial direction, and the precision of the gear 19 can not be ensured during press fitting the gear 19.

Referring to fig. 3, 4, 5, 6 and 7, further, a positioning seat 3 for positioning the gear 19 is further provided on the frame 1, a guide block 10 capable of extending into an inner hole of the gear 19 is penetrated and provided in the positioning seat 3, a second power source 11 is further provided on the frame 1, an output shaft of the second power source 11 is connected with the guide block 10 and can drive the guide block 10 to move up and down along the inner hole of the positioning seat 3, and the guide block 10, the positioning seat 3 and the compression bar 4 are concentrically arranged in the vertical direction. Still further, an annular positioning portion 31 for radially limiting the gear 19 is disposed at the top of the positioning seat 3, a limiting ring portion 101 capable of forming an axial limit with the positioning seat 3 is disposed at the bottom of the guiding block 10, and a chamfer 102 is disposed at the top of the guiding block 10.

Referring to fig. 1, 2, 8 and 10, further, a rotating bin device 12 for placing the bushing 20 to be pressed and a second manipulator 13 for discharging the gear bushing assembly and feeding the bushing 20 are further disposed on the rack 1, the rotating bin device 12 includes a turntable 121 and a cam divider 122 for driving the turntable 121 to rotate, the turntable 121 is uniformly distributed with a plurality of storage stations 123 for placing the bushing 20 to be pressed along the circumferential direction, the second manipulator 13 includes a pair of openable and closable mechanical arms 131, clamping blocks 132 with step surfaces are respectively disposed on the inner sides of the two mechanical arms 131, the surfaces of the two clamping blocks 132 opposite to each other are arc-shaped, and the diameter formed by the parts above the step surfaces after the two clamping blocks 132 are folded is larger than the diameter formed by the parts below the step surfaces. Still further, the frame 1 is further provided with a controller and a third power source 14 electrically connected to the controller, the storage station 123 is columnar and sleeved with a pushing block 15, the frame 1 is further provided with a plurality of first displacement sensors 16, the first displacement sensors 16 are distributed on two sides of the storage station 123 and are arranged along a length direction of the storage station 123, the first displacement sensors 16 are used for generating displacement signals of the bushings 20 on the storage station 123, the controller can control the third power source 14 to drive the pushing block 15 to lift along the storage station 123 according to the displacement signals of the bushings 20, and the controller can also control the opening and closing of the cam divider 122 according to the displacement signals of the bushings 20. In this embodiment, the storage stations 123 are preferably uniformly distributed on the turntable 121, after the bushings 20 on the storage stations 123 located on the storage level are taken out, the cam divider 122 controls the turntable 121 to rotate so that the next storage station 123 enters the storage level, and each time the bushings 20 on the storage stations 123 located on the storage level are taken out, the third power source 14 can drive the pushing block 15 to rise, the rising distance is equal to the thickness of one bushing 20, the height position of the uppermost bushing 20 of the storage station 123 is ensured to be unchanged all the time, so that the second manipulator 13 is convenient to clamp the bushings 20, when the number of bushings in the storage bin is lower than 20, the equipment prompts feeding, but the equipment still continues to work until the bushings are out of use.

Referring to fig. 1 and 2, further, the frame 1 is further provided with a tri-color lamp 17 electrically connected with a controller, the first power source 2 is provided with a pressure sensor for generating a pressure signal of the pressure lever 4 in the press mounting process and a displacement sensor II for generating a displacement signal of the pressure lever 4 in the press mounting process, and the controller can control the first power source 2 to drive the pressure lever 4 to reset or control the tri-color lamp 17 to alarm according to the pressure signal of the pressure lever 4 and the displacement signal of the pressure lever 4.

Referring to fig. 1 and 2, further, a pair of sliding rails two 18 are disposed on the frame 1 along the up-down direction, the compression bar 4 includes a connection portion 41 for connecting with the output shaft of the first power source 2 and a pressing head portion 42 detachably connected with the connection portion 41, the step portion 44 and the elastic telescopic member 9 are both located on the pressing head portion 42, and two sides of the connection portion 41 of the compression bar 4 are respectively slidably disposed on the two sliding rails two 18.

Referring to fig. 1, 2, 8, 9 and 10, further, the frame 1 is further provided with a laser marking machine 21 for marking the gear 19, a first manipulator 24 for positioning during marking the gear 19 and feeding the gear 19, a first conveying chain assembly 22 for conveying the gear 19 to be pressed and a second conveying chain assembly 23 for conveying the gear bushing assembly, the first manipulator 24 is located between the laser marking machine 21 and the positioning seat 3, the first conveying chain assembly 22 is located beside the first manipulator 24 and in front of the laser marking machine 21, the second conveying chain assembly 23 is located in front of the second manipulator 13, and the second conveying chain assembly 23 is located between the positioning seat 3 and the rotary bin device 12. The first conveying chain assembly 22 is provided with a sequencing guide assembly, the tail end of the sequencing guide assembly is provided with a locating plate 26 with a notch, the locating plate 26 is located beside the first manipulator 24, the frame 1 is provided with a cylinder III 27 capable of pushing the gear 19 into the notch of the locating plate 26, the sequencing guide assembly comprises two guide rods 25 which are oppositely arranged and can be respectively close to or far away from each other, and a guide channel capable of being used for a single gear 19 to pass through is formed between the two guide rods 25. The laser marking machine 21 is arranged on the first guide rail 28 in a sliding mode, a plurality of sensors used for detecting the positions and states of the first manipulator 24 and the second manipulator 13 are arranged on the machine frame 1, the first manipulator 24, the second manipulator 13 and the sensors are electrically connected with a controller respectively, and a safety grating used for preventing an operator from being injured by clamping is further arranged on the machine frame 1. Specifically, the first manipulator 24 includes a first slide plate 29 slidably disposed on the frame 1, a rotatable rotating frame 30 is disposed on the first slide plate 29, a first rotating cylinder 39 capable of driving the rotating frame 30 to rotate is disposed at the bottom of the first slide plate 29, a second rotating cylinder 32 capable of moving up and down is disposed on the rotating frame 30, and a first grabbing manipulator 33 for grabbing the gear 19 is disposed on an output shaft of the second rotating cylinder 32. The second manipulator 13 comprises a sliding frame 34 arranged on the frame 1 in a sliding manner, a fixing frame 35 capable of moving up and down is arranged on the sliding frame 34, a rotary air cylinder III 36 is arranged on the fixing frame 35, a grabbing manipulator II 37 for clamping the bushing 20 is arranged on an output shaft of the rotary air cylinder III 36, the grabbing manipulator II 37 is provided with a pair of mechanical arms 131 capable of opening and closing, and a track piece 38 for limiting the movement of the sliding frame 34 is arranged between the sliding frame 34 and the frame 1.

Working principle: the rack 1 of the gear bushing press-fitting machine is divided into an upper part and a lower part, the lower rack is formed by welding profile steel and plates, an adjustable footing is arranged at the bottom of the lower rack, a movable door is arranged at the front side of the lower rack, doors are fixed at two sides, and an electric box is arranged at the rear side of the lower rack; the upper frame part is formed by splicing aluminum profiles; the front side is an operation surface, a two-hand starting switch is arranged, and a curve control screen, a touch screen and a manual debugging button are arranged on the upper part of the operation surface; the two sides are provided with movable doors, and the rear side is provided with a maintenance door. During operation, an operator firstly places the gear 19 to be processed on the conveying chain of the first conveying chain assembly 22, then places the bushings 20 on the storage station 123 of the rotary bin device 12 in sequence, then presses the two-hand start switch, the second manipulator 13 moves to the rotary bin device 12 and clamps the bushings 20 on the storage station 123, then the second manipulator 13 moves to the lower part of the compression bar 4 with the bushings 20, and moves from bottom to top until the bushings 20 are clamped into the accommodating grooves 8 (the bushings 20 are pressed against the annular guide part 7 of the compression bar 4 by the elastic telescopic parts 9), then the second manipulator 13 moves down to the positioning seat 3 to clamp away the gear bushing assembly which is pressed and placed on the second conveying chain assembly 23 (during the first clamping, no gear bushing assembly is pressed on the positioning seat 3, at this time, the second manipulator 13 performs an empty clamping operation), and finally the operator takes away the gear bushing assembly, and then resets the second manipulator 13; while the second manipulator 13 works, the gears 19 are sequentially conveyed to the side of the third air cylinder 27 through the guide channel, then the third air cylinder 27 drives the gears 19 to enter the notch of the positioning plate 26, then the first manipulator 24 moves to the position of the positioning plate 26, the gears 19 in the notch of the positioning plate 26 are clamped to the laser marking machine 21 for marking (the first manipulator 24 can drive the gears 19 to move up and down and left and right and turn over 180 degrees and reset, and rotate horizontally 180 degrees and reset), then the first manipulator 24 horizontally rotates 180 degrees to clamp the marked gears 19 to the positioning seat 3, and then the first manipulator 24 resets; then the first power source 2 drives the compression bar 4 to move downwards rapidly until the guide sleeve 5 on the compression bar 4 is abutted against the top of the gear 19, at this time, the guide sleeve 5 cannot move downwards any more, the pressure head 42 and the bush 20 extend into the inner hole of the gear 19, then the first power source 2 adjusts the downward moving speed of the compression bar 4 to slowly descend, under the action of the first power source 2, the connection part 41 of the compression bar 4 compresses the elastic limiting piece 6 to enable the pressure head 42 to move downwards continuously until the connection part 41 is abutted against the guide sleeve 5 (i.e. the edge of the notch of the annular groove 43 on the connection part 41 is abutted against the top surface of the guide sleeve 5), at this time, the pressure head 42 cannot move downwards any more, the bush 20 is also pressed onto the inner hole of the gear 19 (during the downward moving of the pressure head 42, the step part 44 on the compression bar 4 is pressed against the top of the bush 20, pushing the bushing 20 to synchronously move downwards), then the first power source 2 drives the pressing rod 4 to move upwards and reset, because of the action of the elastic telescopic piece 9, the bushing 20 cannot be taken away from the inner hole of the gear 19 in the upward moving process of the pressing rod 4, in addition, in the downward moving process of the pressing rod 4, the second power source 11 drives the guide block 10 in the positioning seat 3 to synchronously move downwards with the pressing head 42, so that the position deviation of the pressing head 42 in the pressing process is avoided, meanwhile, the controller can control the first power source 2 to drive the pressing rod 4 to reset or control the tri-color lamp 17 to alarm according to the pressure signal of the pressing rod 4 and the displacement signal of the pressing rod 4, when the pressing is not in place, the controller controls the tri-color lamp 17 to alarm and stop, at the moment, the controller needs to manually operate the reset, the press-fitting precision is ensured, and the automation of the gear bushing press-fitting is realized continuously and circularly.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (10)

1. The gear bushing press-fitting machine comprises a frame (1) and a first power source (2) arranged on the frame (1), and is characterized in that a pressing rod (4) is arranged on an output shaft of the first power source (2), a radially-raised step portion (44) is arranged on the outer wall of the pressing rod (4), a guide sleeve (5) and an elastic limiting piece (6) are respectively sleeved on the pressing rod (4), the guide sleeve (5) is pressed on the step portion (44) downwards by the elastic limiting piece (6), an annular guide portion (7) is downwards extended at the bottom of the guide sleeve (5), a containing groove (8) for containing a bushing (20) is formed between the inner peripheral surface of the annular guide portion (7), the outer peripheral surface of the pressing rod (4) and the lower end surface of the step portion (44), and a plurality of elastic telescopic pieces (9) which can be radially telescopic and can press the bushing (20) against the annular guide portion (7) are circumferentially arranged.

2. The gear bushing press-fitting machine according to claim 1, wherein the side wall of the pressing rod (4) is provided with a telescopic cavity (91) along the radial direction, the elastic telescopic piece (9) comprises a spring (92) arranged along the length direction of the telescopic cavity (91), one end of the spring (92) is fixedly connected with the bottom wall of the telescopic cavity (91), the other end of the spring (92) is fixedly provided with a steel ball (93), and the spring (92) presses the steel ball (93) against the edge of the cavity opening of the telescopic cavity (91) so that the steel ball (93) is partially exposed out of the telescopic cavity (91).

3. The gear bushing press-fitting machine according to claim 1, wherein a positioning seat (3) for positioning the gear (19) is further arranged on the frame (1), a guide block (10) capable of extending into an inner hole of the gear (19) is penetrated and arranged in the positioning seat (3), a second power source (11) is further arranged on the frame (1), an output shaft of the second power source (11) is connected with the guide block (10) and can drive the guide block (10) to move up and down along the inner hole of the positioning seat (3), and the guide block (10), the positioning seat (3) and the compression bar (4) are concentrically arranged in the vertical direction.

4. A gear bushing press-fitting machine according to claim 3, characterized in that the top of the positioning seat (3) is provided with an annular positioning portion (31) for radial limiting of the gear (19), the bottom of the guide block (10) is provided with a limiting ring portion (101) capable of forming an axial limit with the positioning seat (3), and the top of the guide block (10) is provided with a chamfer (102).

5. The gear bushing press-fitting machine according to any one of claims 1 to 4, wherein a convex ring portion (51) capable of forming limit fit with the step portion (44) is arranged on the inner wall of the guide sleeve (5), an annular groove (43) is formed in a position, opposite to the convex ring portion (51), of the press rod (4), one end of the elastic limiting piece (6) is fixedly connected with the convex ring portion (51), the other end of the elastic limiting piece is fixedly connected with the bottom of the annular groove (43), and when the press rod (4) is pressed into place, the edge of a notch of the annular groove (43) abuts against the top of the guide sleeve (5).

6. The gear bushing press-fitting machine according to claim 5, wherein the stepped portion (44) is an annular protrusion extending in a radial direction, a chamfer second (45) is provided at a bottom of the pressing rod (4), an edge of a notch of the annular groove (43) is a plane, and a top surface of the guide sleeve (5) is a plane.

7. The gear bushing press-fitting machine according to any one of claims 1-4, wherein a rotary bin device (12) for placing a bushing (20) to be press-fitted and a second manipulator (13) for discharging the gear bushing assembly and feeding the bushing (20) are further arranged on the frame (1), the rotary bin device (12) comprises a turntable (121) and a cam divider (122) for driving the turntable (121) to rotate, a plurality of storage stations (123) for placing the bushing (20) to be press-fitted are uniformly distributed on the turntable (121) along the circumferential direction, the second manipulator (13) comprises a pair of openable mechanical arms (131), clamping blocks (132) with step surfaces are respectively arranged on the inner sides of the two mechanical arms (131), the opposite surfaces of the two clamping blocks (132) are arc-shaped, and the diameter formed by the parts above the step surfaces after the two clamping blocks (132) are folded is larger than the diameter formed by the parts below the step surfaces.

8. The gear bushing press-fitting machine according to claim 7, wherein the frame (1) is further provided with a controller and a third power source (14) electrically connected with the controller, the storage station (123) is columnar and sleeved with a pushing block (15), the frame (1) is further provided with a plurality of first displacement sensors (16), the first displacement sensors (16) are distributed on two sides of the storage station (123) and are arranged along the length direction of the storage station, the first displacement sensors (16) are used for generating displacement signals of the bushing (20) on the storage station (123), the controller can control the third power source (14) to drive the pushing block (15) to lift along the storage station (123) according to the displacement signals of the bushing (20), and the controller can also control the cam divider (122) to be opened and closed according to the displacement signals of the bushing (20).

9. The gear bushing press-fitting machine according to claim 8, wherein the frame (1) is further provided with a tri-color lamp (17) electrically connected with a controller, the first power source (2) is provided with a pressure sensor for generating a pressure signal of the pressure lever (4) in the press-fitting process and a displacement sensor for generating a displacement signal of the pressure lever (4) in the press-fitting process, and the controller can control the first power source (2) to drive the pressure lever (4) to reset or control the tri-color lamp (17) to alarm according to the pressure signal of the pressure lever (4) and the displacement signal of the pressure lever (4).

10. Gear bushing press-fitting machine according to claim 9, characterized in that a pair of slide rails two (18) are arranged on the frame (1) along the up-down direction, the press rod (4) comprises a connecting portion (41) for being connected with the output shaft of the first power source (2) and a pressing head portion (42) detachably connected with the connecting portion (41), the step portion (44) and the elastic telescopic piece (9) are both located on the pressing head portion (42), and two sides of the connecting portion (41) of the press rod (4) are respectively arranged on the two slide rails two (18) in a sliding mode.

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