CN115383160A

CN115383160A - Bipyramid internal expanding clamp of automobile motor shell

Info

Publication number: CN115383160A
Application number: CN202211323481.0A
Authority: CN
Inventors: 陆盈盈; 廖大华
Original assignee: Ningbo Zhongxin Casting Mould Co ltd
Current assignee: Ningbo Zhongxin Casting Mould Co ltd
Priority date: 2022-10-27
Filing date: 2022-10-27
Publication date: 2022-11-25
Anticipated expiration: 2042-10-27
Also published as: CN115383160B

Abstract

The invention relates to the field of automobile part processing, in particular to a double-cone internal expansion clamp of an automobile motor shell, which comprises a rack and a fixing device, wherein the rack is provided with a clamping groove; the fixing device comprises a rotary driver, a clamping assembly, a first linear driver and a push rod; the clamping assembly comprises a main shaft, a first mounting seat, a conical sliding block and an expansion sleeve; the main shaft is rotatably arranged on the frame, and the driving end of the rotary driver is coaxially and fixedly connected with the main shaft; the first mounting seat is fixedly sleeved on the main shaft; the conical sliding block can be sleeved on the main shaft in a sliding manner; the expansion sleeve is slidably mounted on the first mounting seat, two conical surfaces which are symmetrical to each other are formed in the expansion sleeve, and the conical surfaces are in sliding fit with the conical sliding blocks; the first linear driver and the push rod are two, and the first linear driver is fixedly installed on the first installation seat. The invention realizes the function of simultaneously extruding the two conical surfaces of the expansion sleeve in the clamping process and solves the problem that the expansion sleeve of the traditional double-cone internal expansion clamp moves axially in the clamping process.

Description

Bipyramid internal expanding clamp of automobile motor shell

Technical Field

The invention relates to the field of automobile part machining, in particular to a double-cone internal expansion clamp of an automobile motor shell.

Background

The automobile motor is an important component in an automobile, and when the outer circumference of the automobile motor shell is machined, if a common three-jaw chuck is used for clamping, once the clamping force is too small, a workpiece can shake in the machining process to influence the machining precision, and once the clamping force is too large, the workpiece can be damaged.

Therefore, the chinese patent CN213104552U discloses an internal expansion clamp for flange parts of an automobile, which is convenient for the flange parts to be sleeved on a clamping body and then internally expand and tighten the spring expansion sleeve, so as to clamp the flange parts, prevent the flange parts from jumping during the processing process and improve the clamping stability of the flange parts.

However, the effective clamping length of the internal expanding clamp is limited, and a workpiece with a long length cannot be stably clamped, but the principle of the existing internal expanding clamp is to convert the axial backward pulling force into a radial expanding force, the workpiece is clamped and loosened by utilizing the backward pulling of a taper surface and depending on the deformation of an expanding sleeve, the common taper is unilateral 10 degrees and unilateral 15 degrees, the smaller the taper, the larger the clamping force is, when the workpiece with the long length is clamped, a double-cone internal expanding clamp needs to be used, the clamping length is ensured by the parallel expansion of two ends simultaneously, but in the clamping process of the existing double-cone internal expanding clamp, the expanding sleeve can simultaneously move in the radial direction and the axial direction, so that the position of the workpiece is deviated, and the machining precision is influenced.

Disclosure of Invention

Aiming at the problems, the double-cone internal expanding clamp of the automobile motor shell is provided, and the problem of axial movement occurs in the clamping process through the expanding sleeve of the rotary driver, the clamping assembly, the first linear driver and the push rod of the traditional double-cone internal expanding clamp.

In order to solve the problems of the prior art, the invention adopts the technical scheme that:

a double-cone internal expanding clamp of an automobile motor shell comprises a rack and a fixing device; the fixing device comprises a rotary driver, a clamping component, a first linear driver and a push rod; the rotary driver is fixedly arranged on the frame; the clamping assembly comprises a main shaft, a first mounting seat, a conical sliding block and an expansion sleeve; the main shaft is rotatably arranged on the frame, and the driving end of the rotary driver is coaxially and fixedly connected with the main shaft; the first mounting seat is fixedly sleeved on the main shaft; the two conical sliding blocks are arranged, the conical sliding blocks can be sleeved on the main shaft in a sliding mode, and the conical sliding blocks can rotate synchronously with the main shaft; the expansion sleeve is slidably mounted on the first mounting seat, two conical surfaces which are symmetrical to each other are formed in the expansion sleeve, and the two conical surfaces are respectively in sliding fit with the two conical sliding blocks; the first linear driver and the push rod are arranged in two numbers, and the first linear driver is fixedly arranged on the first mounting seat; one end of the push rod is fixedly connected with the driving end of the first linear driver, and the other end of the push rod is fixedly connected with the conical sliding block.

Preferably, the double-cone internal expanding clamp further comprises a positioning device, the positioning device comprises a detection assembly, and the detection assembly comprises a pressure sensor and a first elastic piece; the pressure sensor is fixedly arranged on the conical sliding block; two ends of the first elastic piece are respectively fixedly connected with the pressure sensor and the first mounting seat.

Preferably, the double-cone internal expanding clamp further comprises a self-locking device, and the self-locking device comprises a second mounting seat and a second elastic piece; the conical sliding block is provided with at least one mounting groove; the second mounting seats are arranged in a plurality and correspond to the mounting grooves one by one, and the second mounting seats are slidably mounted in the mounting grooves; the second elastic pieces are provided with a plurality of second mounting seats which correspond to the second mounting seats one by one, and two ends of each second elastic piece are fixedly connected with the conical sliding block and the second mounting seat respectively; two clamping grooves are formed in the inner ring of the expansion sleeve.

Preferably, the positioning device further comprises a limiting assembly, and the limiting assembly comprises a limiting ring and a shifting rod; the limiting ring is fixedly arranged on the first mounting seat; the inner ring of the expansion sleeve is provided with a limiting groove and a sliding groove, and the limiting ring is in sliding fit with the limiting groove; at least one deflector rod is arranged and fixedly arranged on the first mounting seat; the sliding grooves are provided with a plurality of shifting rods which correspond to the shifting rods one by one, and the shifting rods are in sliding fit with the sliding grooves.

Preferably, the positioning device further comprises two limiting plates and two induction assemblies; the limiting plate is fixedly sleeved on the main shaft, and the conical sliding block is positioned between the first mounting seat and the limiting plate; the sensing assembly comprises a contact sensor, a third elastic piece and a top block; the contact sensor is fixedly arranged on the limiting plate; two ends of the third elastic piece are respectively fixedly connected with the contact sensor and the top block; the ejector block is slidably mounted on the limiting plate.

Preferably, the double-cone internal expanding clamp further comprises an adjusting device, and the adjusting device comprises a guide rod, a screw rod and a second rotary driving assembly; the limiting plate can be sleeved on the main shaft in a sliding manner; the guide rod is fixedly arranged on the first mounting seat and is in sliding fit with the limiting plate; the screw is rotatably arranged on the first mounting seat, two thread sections with opposite spiral directions are arranged on the screw, and the two thread sections are respectively in threaded connection with the two limiting plates; the second rotary driving component is fixedly arranged on the rack, and the driving end of the second rotary driving component is in transmission connection with the screw rod.

Preferably, the second rotary drive assembly comprises a roller and an annular slide rail; the roller is fixedly sleeved on the screw; the annular slide rail is slidably arranged on the rack; and a control assembly for driving the annular slide rail to slide is fixedly mounted on the rack.

Preferably, the adjusting device further comprises a speed reduction transmission assembly, and the speed reduction transmission assembly comprises an installation circular truncated cone, a worm wheel and a worm; the mounting round platform is rotatably mounted on the frame and fixedly sleeved on the main shaft; the worm wheel is fixedly sleeved on the screw rod; the worm is rotatably arranged on the mounting round platform, the worm is in transmission connection with the worm wheel, and the idler wheel is fixedly sleeved on the worm.

Preferably, the control assembly comprises a limiting slide rail, a second linear driver and a connecting block; the limiting slide rail is fixedly arranged on the rack, and the annular slide rail is slidably arranged on the limiting slide rail; the second linear driver is fixedly arranged on the rack; the connecting block is fixedly arranged on the limiting slide rail and is fixedly connected with the driving end of the second linear driver.

Preferably, the speed reduction transmission assembly further comprises a gasket, the gasket is fixedly mounted on the mounting circular truncated cone, and the gasket is located between the mounting circular truncated cone and the rack.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, the function of simultaneously extruding two conical surfaces of the expansion sleeve in the clamping process is realized through the rotary driver, the clamping assembly, the first linear driver and the push rod, the effect of stabilizing the position of the expansion sleeve is achieved, the axial movement of the expansion sleeve in the clamping process is avoided, and the problem of the axial movement of the expansion sleeve of the traditional double-cone internal expansion clamp in the clamping process is solved.

2. According to the invention, the function of accurately judging the distance between the first mounting seat and the conical sliding block is realized through the pressure sensor and the first elastic piece, and the effect of conveniently judging the state of the double-cone internal expanding clamp is achieved.

3. According to the invention, the function of automatically locking the position of the conical sliding block during high-speed rotation is realized through the mounting groove, the second mounting seat, the second elastic piece and the clamping groove, and the effect of preventing the double-cone internal expansion clamp from loosening in the machining process is achieved.

Drawings

FIG. 1 is a perspective view of a double-cone internal expanding clamp for an automotive motor casing;

FIG. 2 is a front view of a double-cone internal expanding clamp of an automotive motor casing in an expanded state;

FIG. 3 is a side view of a fixing device, a positioning device and a self-locking device in a double-cone internal expanding clamp of an automobile motor casing;

FIG. 4 isbase:Sub>A cross-sectional schematic view A-A of FIG. 3;

FIG. 5 is an enlarged partial schematic view at B in FIG. 4;

FIG. 6 is a schematic perspective view of a fixing device, a positioning device and a self-locking device in a double-cone internal expanding clamp of an automobile motor casing;

FIG. 7 is a schematic exploded perspective view of a fixing device, a positioning device and a self-locking device in a double-cone internal expanding clamp of an automobile motor casing;

FIG. 8 is an exploded perspective view of the sensing assembly of the dual cone internal expansion clamp of an automotive motor casing;

FIG. 9 is a front view of a bi-conical internal expansion clamp of an automotive motor casing in an unexpanded condition;

FIG. 10 is a cross-sectional schematic cross-sectional view of C-C of FIG. 9;

FIG. 11 is an enlarged partial schematic view at D of FIG. 10;

FIG. 12 is a perspective view of an adjustment mechanism in a bi-conical internal expanding clamp of an automotive motor casing;

FIG. 13 is a schematic perspective view of the control assembly and the reduction drive assembly of the double-cone internal expanding clamp of the motor casing of an automobile in cooperation with the mounting boss;

FIG. 14 is a perspective view of the control assembly and the reduction drive assembly in a double-cone internal expanding clamp for an automotive motor casing.

The reference numbers in the figures are:

1-a frame;

2-a fixing device;

21-a rotary drive;

22-a clamping assembly; 221-a main shaft; 222-a first mount; 223-tapered slider; 224-an expansion sleeve;

23-a first linear driver;

24-a push rod;

3-a positioning device;

31-a detection component; 311-a pressure sensor; 312-a first resilient member;

32-a stop assembly; 321-a limit ring; 322-a limiting groove; 323-driving lever; 324-a chute;

33-a limiting plate;

34-a sensing assembly; 341-contact sensor; 342-a third resilient member; 343-top block;

4-self-locking device;

41-mounting groove;

42-a second mount;

43-a second elastic member;

44-a card slot;

5-a regulating device;

51-a guide bar;

52-a screw;

53-a second rotary drive assembly; 531-roller; 532-annular slide rail;

54-a control assembly; 541-a limit slide rail; 542-a second linear drive; 543-connecting block;

55-a reduction drive assembly; 551-mounting the circular truncated cone; 552-worm gear; 553-a worm; 554-a gasket;

6-motor shell.

Detailed Description

For further understanding of the features and technical means of the present invention, as well as the specific objects and functions attained by the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.

Referring to fig. 1-14: a double-cone internal expanding clamp of an automobile motor shell comprises a frame 1 and a fixing device 2; the fixture 2 comprises a rotary actuator 21, a clamping assembly 22, a first linear actuator 23 and a push rod 24; the rotary driver 21 is fixedly arranged on the frame 1; the clamping assembly 22 comprises a main shaft 221, a first mounting seat 222, a conical sliding block 223 and an expansion sleeve 224; the main shaft 221 is rotatably installed on the frame 1, and the driving end of the rotary driver 21 is coaxially and fixedly connected with the main shaft 221; the first mounting base 222 is fixedly sleeved on the main shaft 221; the two conical sliding blocks 223 are arranged, the conical sliding blocks 223 can be sleeved on the main shaft 221 in a sliding mode, and the conical sliding blocks 223 can rotate synchronously with the main shaft 221; the expansion sleeve 224 is slidably mounted on the first mounting seat 222, two symmetrical conical surfaces are formed inside the expansion sleeve 224, and the two conical surfaces are respectively in sliding fit with the two conical sliding blocks 223; two first linear drivers 23 and two push rods 24 are arranged, and the first linear drivers 23 are fixedly arranged on the first mounting seats 222; one end of the push rod 24 is fixedly connected with the driving end of the first linear driver 23, and the other end of the push rod 24 is fixedly connected with the conical sliding block 223.

According to the invention, the rotary driver 21, the clamping assembly 22, the first linear driver 23 and the push rod 24 are used for realizing the function of simultaneously extruding two conical surfaces of the expansion sleeve 224 in the clamping process, so that the effect of stabilizing the position of the expansion sleeve 224 is achieved, the expansion sleeve 224 is prevented from moving axially in the clamping process, and the problem that the expansion sleeve 224 of the traditional double-cone internal expansion clamp moves axially in the clamping process is solved; the expansion sleeve 224 is preferably made of spring steel; the rotary driver 21 is preferably a servo motor, the first linear driver 23 is preferably a linear air cylinder, and the rotary driver 21 and the first linear driver 23 are electrically connected with the controller; an operator firstly sleeves the motor shell 6 on the expansion sleeve 224, then sends a signal to the first linear driver 23 through the controller, the two first linear drivers 23 respectively drive the two push rods 24 to extend after receiving the signal, the two push rods 24 respectively drive the two conical sliding blocks 223 to move towards the first mounting seat 222, the conical surface of the inner ring of the expansion sleeve 224 is extruded through the conical surface of the conical sliding blocks 223, the two ends of the expansion sleeve 224 are simultaneously extruded, the expansion sleeve 224 is matched with the inner ring of the motor shell 6 to clamp the motor shell 6, then the controller sends a signal to the rotary driver 21, the rotary driver 21 drives the main shaft 221 to rotate after receiving the signal, and the main shaft 221 drives the first mounting seat 222, the conical sliding blocks 223 and the expansion sleeve 224 to synchronously rotate so as to conveniently process the periphery of the motor shell 6.

The double-cone internal expanding clamp further comprises a positioning device 3, the positioning device 3 comprises a detection assembly 31, and the detection assembly 31 comprises a pressure sensor 311 and a first elastic part 312; the pressure sensor 311 is fixedly arranged on the conical sliding block 223; both ends of the first elastic member 312 are fixedly connected to the pressure sensor 311 and the first mounting seat 222, respectively.

According to the invention, the function of accurately judging the distance between the first mounting seat 222 and the conical sliding block 223 is realized through the pressure sensor 311 and the first elastic piece 312, so that the effect of conveniently judging the state of the double-cone internal expansion clamp is achieved; the first elastic member 312 is preferably a nitrogen spring, and the pressure sensor 311 is electrically connected with the controller; an operator firstly sleeves the motor shell 6 on the expansion sleeve 224, then sends a signal to the first linear driver 23 through the controller, and the expansion sleeve 224 expands under the driving of the first linear driver 23, so that the motor shell 6 is stably clamped; in the process, as the first linear actuator 23 drives the tapered slider 223 to slide, the tapered slider 223 compresses the first elastic member 312, the elastic force generated after the first elastic member 312 contracts is applied to the pressure sensor 311, the pressure sensor 311 feeds back a signal to the controller after sensing the pressure change, the controller can determine the state of the expansion sleeve 224 after receiving the signal, once an abnormal state occurs during the clamping process, and when the first linear actuator 23 stops driving, the expansion sleeve 224 contracts to recover to the initial state, meanwhile, the tapered slider 223 returns to the original position under the elastic force of the expansion sleeve 224 and the first elastic member 312, the pressure sensor 311 feeds back a signal to the controller when sensing the pressure change, the controller sends a signal to the rotary actuator 21 after receiving the signal, and the rotary actuator 21 stops driving, stops processing, and avoids safety accidents and larger cost loss.

The double-cone internal expanding clamp further comprises a self-locking device 4, wherein the self-locking device 4 comprises a second mounting seat 42 and a second elastic piece 43; the conical sliding block 223 is provided with at least one mounting groove 41; the second installation seats 42 are provided with a plurality of installation seats, the second installation seats are in one-to-one correspondence with the installation grooves 41, and the second installation seats 42 are installed in the installation grooves 41 in a sliding mode; the second elastic pieces 43 are provided with a plurality of second elastic pieces which correspond to the second mounting seats 42 one by one, and two ends of each second elastic piece 43 are fixedly connected with the conical sliding block 223 and the second mounting seat 42 respectively; the inner ring of the expansion sleeve 224 is provided with two clamping grooves 44.

According to the invention, the function of automatically locking the position of the conical sliding block 223 during high-speed rotation is realized through the mounting groove 41, the second mounting seat 42, the second elastic piece 43 and the clamping groove 44, so that the effect of preventing the double-cone internal expansion clamp from loosening in the machining process is achieved; an operator firstly sleeves the motor shell 6 on the expansion sleeve 224, then sends a signal to the first linear driver 23 through the controller, and the expansion sleeve 224 expands under the driving of the first linear driver 23, so that the motor shell 6 is stably clamped; the controller sends a signal to the rotary driver 21, the rotary driver 21 receives the signal and then drives the main shaft 221 to rotate, the main shaft 221 drives the first mounting seat 222, the conical sliding block 223 and the expansion sleeve 224 to rotate, the second mounting seat 42 overcomes the elastic force of the second elastic piece 43 to slide out of the mounting groove 41 under the action of centrifugal force along with the increase of the rotating speed, at the moment, the second mounting seat 42 is clamped into the clamping groove 44 of the expansion sleeve 224, even if the first linear driver 23 stops driving under the abnormal condition, the movement of the conical sliding block 223 can be limited through the limitation of the clamping groove 44 on the second mounting seat 42, and therefore the situation that the double-cone internal expansion clamp loosens the clamping of the motor shell 6 is avoided.

The positioning device 3 further comprises a limiting assembly 32, wherein the limiting assembly 32 comprises a limiting ring 321 and a shifting rod 323; the limiting ring 321 is fixedly mounted on the first mounting seat 222; the inner ring of the expansion sleeve 224 is provided with a limit groove 322 and a sliding groove 324, and the limit ring 321 is in sliding fit with the limit groove 322; at least one shifting rod 323 is arranged, and the shifting rod 323 is fixedly arranged on the first mounting seat 222; the sliding grooves 324 are provided in a plurality and correspond to the shift levers 323 one by one, and the shift levers 323 are in sliding fit with the sliding grooves 324.

The invention realizes the function of stably supporting the expansion sleeve 224 through the limiting ring 321, the limiting groove 322, the shifting lever 323 and the sliding groove 324, and achieves the effect of avoiding the dislocation of the expansion sleeve 224; through the matching of the limiting ring 321 and the limiting groove 322, the expansion sleeve 224 can be prevented from moving axially along the first mounting seat 222; meanwhile, the plurality of shift levers 323 arranged on the first mounting base 222 can stably transmit the rotation of the first mounting base 222 to the expansion sleeve 224, so that the expansion sleeve 224 can still stably rotate synchronously with the first mounting base 222 after deformation, the clamping stability of the motor shell 6 is improved, and the machining precision of the motor shell 6 is guaranteed.

The positioning device 3 further comprises two limiting plates 33 and two induction assemblies 34, wherein the two limiting plates 33 and the two induction assemblies 34 are arranged; the limiting plate 33 is fixedly sleeved on the main shaft 221, and the conical sliding block 223 is positioned between the first mounting seat 222 and the limiting plate 33; the sensing assembly 34 includes a contact sensor 341, a third elastic member 342, and a top block 343; the contact sensor 341 is fixedly mounted on the limit plate 33; both ends of the third elastic member 342 are fixedly connected with the contact sensor 341 and the top block 343, respectively; the top block 343 is slidably mounted on the stopper plate 33.

According to the invention, the function of limiting the movement range of the conical sliding block 223 and avoiding severe impact between the conical sliding block 223 and the limiting plate 33 is realized through the limiting plate 33, the contact sensor 341, the third elastic piece 342 and the top block 343; the contact sensor 341 is electrically connected with the controller; after the motor shell 6 is machined, the controller sends a signal to the first linear driver 23, the first linear driver 23 drives the push rod 24 to extend out, the push rod 24 drives the conical sliding block 223 to move, after the conical sliding block 223 is contacted with the top block 343, along with the movement of the conical sliding block 223, the conical sliding block 223 overcomes the elastic force of the third elastic piece 342 to drive the top block 343 to synchronously slide, after the top block 343 is contacted with the contact sensor 341, the contact sensor 341 feeds back a signal to the controller, the controller sends a signal to the first linear driver 23, and the first linear driver 23 stops driving, so that accurate control is achieved, and severe impact between the conical sliding block 223 and a limiting block is avoided.

The double-cone internal expanding clamp further comprises an adjusting device 5, wherein the adjusting device 5 comprises a guide rod 51, a screw 52 and a second rotary driving assembly 53; the limit plate 33 is slidably sleeved on the main shaft 221; the guide rod 51 is fixedly arranged on the first mounting seat 222, and the guide rod 51 is in sliding fit with the limit plate 33; the screw 52 is rotatably mounted on the first mounting seat 222, two thread sections with opposite spiral directions are formed on the screw 52, and the two thread sections are respectively in threaded connection with the two limit plates 33; the second rotary driving assembly 53 is fixedly installed on the frame 1, and a driving end of the second rotary driving assembly 53 is in transmission connection with the screw 52.

According to the invention, the function of adjusting the position of the limiting plate 33 is realized through the guide rod 51, the screw 52 and the second rotary driving component 53, so that the effect of accurately controlling the initial size of the expansion sleeve 224 is achieved; when an operator needs to adjust the position of the limit plate 33, the second rotary driving assembly 53 drives the screw 52 to rotate, the limit plate 33 is limited by the spindle 221 and the guide rod 51, and the rotation of the screw 52 drives the limit plate 33 to slide, so that the distance between the limit plate 33 and the first mounting seat 222 is adjusted; the expansion sleeve 224 can be in a certain expansion state when not in operation by adjusting the position of the limit plate 33, so as to limit the inner diameter size of the workpiece mounted on the expansion sleeve 224, the expansion sleeve 224 can primarily screen the inner diameter quality of the workpiece due to a small size change range, once the inner diameter of the workpiece is small, the expansion sleeve 224 cannot be sleeved on the expansion sleeve 224 in the non-operation state, and once the workpiece is large in size, the expansion sleeve 224 cannot stably clamp the workpiece, an operator manually slides the motor housing 6 when the expansion sleeve 224 is in the expansion state through the driving of the first linear driver 23, and if the expansion sleeve 224 cannot slide, the size of the motor housing is proper; if the cable can be pulled, the cable is unqualified in size.

The second rotary drive assembly 53 comprises a roller 531 and an endless slide track 532; the roller 531 is fixedly sleeved on the screw 52; the annular slide rail 532 is slidably mounted on the frame 1; the frame 1 is fixedly provided with a control assembly 54 for driving the annular slide rail 532 to slide.

The invention realizes the function of driving the screw rod 52 to rotate through the roller 531, the annular slide rail 532 and the control component 54; the control assembly 54 is electrically connected with the controller; when an operator needs to adjust the position of the limit plate 33, a signal is sent to the control assembly 54 through the controller, the control assembly 54 drives the annular sliding rail 532 to move until the annular sliding rail 532 contacts with the roller 531, at this time, the controller sends a signal to the rotary actuator 21 again, the rotary actuator 21 drives the main shaft 221 to rotate, the main shaft 221 drives the first mounting seat 222, the guide rod 51 and the screw rod 52 to synchronously rotate, the annular sliding rail 532 rotates along with the axis of the screw rod 52 along the main shaft 221, the annular sliding rail 532 is limited by the control assembly 54 and is in a stationary state relative to the rack 1, the roller 531 rolls along the track of the annular sliding rail 532, so as to drive the screw rod 52 to rotate, the limit plate 33 is limited by the main shaft 221 and the guide rod 51, the rotation of the screw rod 52 drives the limit plate 33 to slide, so as to adjust the distance between the limit plate 33 and the first mounting seat 222, after the adjustment is completed, the operator sends a signal to the control assembly 54 through the controller, and the control assembly 54 drives the annular sliding rail 532 to move, so that the annular sliding rail 532 is separated from the roller 531.

The adjusting device 5 further comprises a reduction drive assembly 55, the reduction drive assembly 55 comprising a mounting boss 551, a worm wheel 552 and a worm 553; the mounting round platform 551 is rotatably mounted on the frame 1, and the mounting round platform 551 is fixedly sleeved on the main shaft 221; the worm gear 552 is fixedly sleeved on the screw rod 52; the worm 553 is rotatably mounted on the mounting circular platform 551, the worm 553 is in transmission connection with the worm wheel 552, and the roller 531 is fixedly sleeved on the worm 553.

The invention realizes the function of speed reduction transmission by installing the circular truncated cone 551, the worm wheel 552 and the worm 553, achieves the effect of avoiding the over-high rotating speed of the screw 52, and further improves the adjustment precision of the position of the limiting plate 33; when an operator adjusts the position of the position-limiting plate 33, a signal is sent to the control assembly 54 through the controller, the control assembly 54 drives the annular sliding rail 532 to move, so that the annular sliding rail 532 contacts with the roller 531, then a signal is sent to the rotary actuator 21 through the controller, the rotary actuator 21 drives the main shaft 221 to rotate, the main shaft 221 drives the first mounting seat 222, the guide rod 51 and the screw 52 to synchronously rotate, the annular sliding rail 532 rotates along the axis of the main shaft 221 along with the screw 52, the annular sliding rail 532 is limited by the control assembly 54 and is in a stationary state relative to the rack 1, the roller 531 rolls along the track of the annular sliding rail 532, so as to drive the worm 553 to rotate, the worm 553 drives the worm wheel 552 in transmission connection with the worm 553 to rotate, the worm wheel 552 drives the screw 52 to rotate, the position-limiting plate 33 is limited by the main shaft 221 and the guide rod 51, the rotation of the screw 52 drives the position-limiting plate 33 to slide, so as to adjust the distance between the position-limiting plate 33 and the first mounting seat 222

The control assembly 54 comprises a limit slide rail 541, a second linear driver 542 and a connecting block 543; the limit slide rail 541 is fixedly installed on the rack 1, and the annular slide rail 532 is slidably installed on the limit slide rail 541; the second linear actuator 542 is fixedly mounted on the frame 1; the connecting block 543 is fixedly mounted on the limiting slide rail 541, and the connecting block 543 is fixedly connected with the driving end of the second linear driver 542.

The function of driving the annular sliding rail 532 to move is realized through the limiting sliding rail 541, the second linear driver 542 and the connecting block 543; the second linear actuator 542 is preferably a linear air cylinder; when the operator adjusts the position of the annular slide rail 532 through the control assembly 54, the controller sends a signal to the second linear actuator 542, the second linear actuator 542 drives the connecting block 543 to move, the connecting block 543 drives the limiting slide rail 541 to move, the quick response through the second linear actuator 542 can improve the adjusting precision, and the control accuracy is further improved.

The reduction drive assembly 55 further comprises a spacer 554, the spacer 554 being fixedly mounted on the mounting boss 551, the spacer 554 being located between the mounting boss 551 and the frame 1.

The invention realizes the function of avoiding sliding friction between the mounting circular truncated cone 551 and the frame 1 through the gasket 554, and achieves the effect of reducing the abrasion of the frame 1 and the mounting circular truncated cone 551; the gasket 554 is preferably a graphite packing, because in a machining state, the mounting circular truncated cone 551 can synchronously rotate along with the rotation of the main shaft 221, and in a high-speed rotation state, once the mounting circular truncated cone 551 is in contact with the frame 1, the mounting circular truncated cone 551 and the frame 1 are greatly abraded, therefore, the gasket 554 is mounted on the mounting circular truncated cone 551, through the transition of the gasket 554, the friction force borne by the rotation of the mounting circular truncated cone 551 is reduced, the severe abrasion of the mounting circular truncated cone 551 is avoided, and the service life of the mounting circular truncated cone 551 is prolonged.

The above examples, which are intended to represent only one or more embodiments of the present invention, are described in greater detail and with greater particularity, and are not to be construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A double-cone internal expanding clamp of an automobile motor shell is characterized by comprising a rack (1) and a fixing device (2);

the fixing device (2) comprises a rotary driver (21), a clamping component (22), a first linear driver (23) and a push rod (24);

the rotary driver (21) is fixedly arranged on the frame (1);

the clamping assembly (22) comprises a main shaft (221), a first mounting seat (222), a conical sliding block (223) and an expansion sleeve (224);

the main shaft (221) is rotatably mounted on the frame (1), and the driving end of the rotary driver (21) is coaxially and fixedly connected with the main shaft (221);

the first mounting seat (222) is fixedly sleeved on the main shaft (221);

the number of the conical sliding blocks (223) is two, the conical sliding blocks (223) can be sleeved on the main shaft (221) in a sliding mode, and the conical sliding blocks (223) can rotate synchronously with the main shaft (221);

the expansion sleeve (224) is slidably mounted on the first mounting base (222), two symmetrical conical surfaces are formed in the expansion sleeve (224), and the two conical surfaces are respectively in sliding fit with the two conical sliding blocks (223);

the number of the first linear driver (23) and the number of the push rod (24) are two, and the first linear driver (23) is fixedly installed on the first installation seat (222);

one end of the push rod (24) is fixedly connected with the driving end of the first linear driver (23), and the other end of the push rod (24) is fixedly connected with the conical sliding block (223).

2. The double-cone internal expanding clamp of the automobile motor casing is characterized by further comprising a positioning device (3), wherein the positioning device (3) comprises a detection assembly (31), and the detection assembly (31) comprises a pressure sensor (311) and a first elastic piece (312);

the pressure sensor (311) is fixedly arranged on the conical sliding block (223);

two ends of the first elastic piece (312) are respectively fixedly connected with the pressure sensor (311) and the first mounting seat (222).

3. The double-cone internal expanding clamp of the automobile motor casing is characterized by further comprising a self-locking device (4), wherein the self-locking device (4) comprises a second mounting seat (42) and a second elastic piece (43);

mounting grooves (41) are formed in the conical sliding block (223), and at least one mounting groove (41) is formed in each mounting groove;

the second installation seats (42) are arranged in a plurality and correspond to the installation grooves (41) one by one, and the second installation seats (42) are installed in the installation grooves (41) in a sliding mode;

the second elastic pieces (43) are provided with a plurality of second elastic pieces and correspond to the second installation seats (42) one by one, and two ends of each second elastic piece (43) are fixedly connected with the conical sliding block (223) and the second installation seat (42) respectively;

two clamping grooves (44) are formed in the inner ring of the expansion sleeve (224).

4. The double-cone internal expanding clamp of the automobile motor casing as claimed in claim 2, wherein the positioning device (3) further comprises a limiting assembly (32), and the limiting assembly (32) comprises a limiting ring (321) and a shifting rod (323);

the limiting ring (321) is fixedly arranged on the first mounting seat (222);

the inner ring of the expansion sleeve (224) is provided with a limiting groove (322) and a sliding groove (324), and the limiting ring (321) is in sliding fit with the limiting groove (322);

at least one shifting lever (323) is arranged, and the shifting lever (323) is fixedly arranged on the first mounting seat (222);

the sliding grooves (324) are provided with a plurality of shifting rods (323) which are in one-to-one correspondence, and the shifting rods (323) are in sliding fit with the sliding grooves (324).

5. The double-cone internal expanding clamp of the automobile motor casing as claimed in claim 2, wherein the positioning device (3) further comprises two limiting plates (33) and two sensing assemblies (34), and the number of the limiting plates (33) and the number of the sensing assemblies (34) are two;

the limiting plate (33) is fixedly sleeved on the main shaft (221), and the conical sliding block (223) is positioned between the first mounting seat (222) and the limiting plate (33);

the sensing assembly (34) comprises a contact sensor (341), a third elastic member (342) and a top block (343);

the contact sensor (341) is fixedly arranged on the limit plate (33);

two ends of the third elastic piece (342) are respectively and fixedly connected with the contact sensor (341) and the top block (343);

the ejector block (343) is slidably mounted on the limiting plate (33).

6. The double-cone internal expanding clamp for the motor casing of the automobile is characterized by further comprising an adjusting device (5), wherein the adjusting device (5) comprises a guide rod (51), a screw rod (52) and a second rotary driving assembly (53);

the limiting plate (33) is sleeved on the main shaft (221) in a sliding manner;

the guide rod (51) is fixedly arranged on the first mounting seat (222), and the guide rod (51) is in sliding fit with the limiting plate (33);

the screw rod (52) is rotatably mounted on the first mounting seat (222), two thread sections with opposite spiral directions are formed in the screw rod (52), and the two thread sections are respectively in threaded connection with the two limiting plates (33);

the second rotary driving component (53) is fixedly arranged on the frame (1), and the driving end of the second rotary driving component (53) is in transmission connection with the screw rod (52).

7. The double-cone internal expanding clamp of the automobile motor casing as claimed in claim 6, wherein the second rotary driving assembly (53) comprises a roller (531) and an annular sliding rail (532);

the roller (531) is fixedly sleeved on the screw (52);

the annular sliding rail (532) is slidably mounted on the rack (1);

and a control component (54) for driving the annular sliding rail (532) to slide is fixedly mounted on the rack (1).

8. The double-cone internal expanding clamp of the motor casing of the automobile as claimed in claim 7, wherein the adjusting device (5) further comprises a speed reduction transmission assembly (55), the speed reduction transmission assembly (55) comprises a mounting circular truncated cone (551), a worm wheel (552) and a worm (553);

the mounting circular truncated cone (551) is rotatably mounted on the rack (1), and the mounting circular truncated cone (551) is fixedly sleeved on the main shaft (221);

the worm wheel (552) is fixedly sleeved on the screw rod (52);

the worm (553) is rotatably arranged on the mounting circular truncated cone (551), the worm (553) is in transmission connection with the worm wheel (552), and the roller (531) is fixedly sleeved on the worm (553).

9. The double-cone internal expanding clamp of the automobile motor casing as claimed in claim 7, wherein the control assembly (54) comprises a limit slide rail (541), a second linear actuator (542) and a connecting block (543);

the limiting sliding rail (541) is fixedly arranged on the rack (1), and the annular sliding rail (532) is slidably arranged on the limiting sliding rail (541);

the second linear driver (542) is fixedly arranged on the frame (1);

the connecting block (543) is fixedly mounted on the limiting slide rail (541), and the connecting block (543) is fixedly connected with the driving end of the second linear driver (542).

10. The double-cone internal expanding clamp for the motor casing of the automobile according to claim 8, wherein the speed reduction transmission assembly (55) further comprises a gasket (554), the gasket (554) is fixedly mounted on the mounting circular truncated cone (551), and the gasket (554) is located between the mounting circular truncated cone (551) and the frame (1).