CN214850820U - Screw rod rotating device - Google Patents

Abstract

The utility model provides a screw rod rotary device belongs to manufacture equipment technical field. The automatic tooth-removing device comprises a motor, a transmission shaft and a screw rod, wherein the transmission shaft is connected with the screw rod through an automatic tooth-removing assembly, the automatic tooth-removing assembly comprises an outer sleeve and an inner cylinder, the outer sleeve is fixedly connected with the transmission shaft, the screw rod is fixedly connected with the inner cylinder, and the outer sleeve is sleeved outside the inner cylinder and is relatively and fixedly connected with the inner cylinder through an elastic part; when the screw is in a normal state, the motor drives the transmission shaft to rotate, the outer sleeve, the inner sleeve and the screw are sequentially driven to synchronously rotate, when the rotation of the screw is limited, the inner sleeve and the outer sleeve are separated from a fixed connection state, the outer sleeve can slip and rotate outside the inner sleeve, and the automatic tooth stripping of the screw is realized. In the utility model, the screw rod is not fixed connection with the transmission shaft, but through the relative fixed connection of automatic tooth subassembly of taking off, and normal conditions is screw rod and transmission shaft synchronous revolution, and when the screw rod was rotatory when being restricted, the screw rod breaks away from with the transmission shaft and is connected, and the screw rod can not be crossed along with the transmission shaft to this protection screw rod.

Description

Screw rod rotating device

Technical Field

The utility model belongs to the technical field of the manufacture equipment, a aversion conveying structure is related to, concretely relates to screw rod rotary device that can automatic take off tooth.

Background

In modern automated mechanical equipment, the movement of an object is often involved, and the object is usually driven by a driving part such as a motor and an air cylinder to generate displacement, for example, a lead screw motor is a type of motor which converts the rotary motion of the motor into linear motion, and mainly comprises a motor body and a lead screw assembly, wherein the lead screw assembly comprises a lead screw and a sliding block, a rotating shaft of the motor body is connected with the lead screw through a coupler so as to drive the lead screw to rotate, and the lead screw rotates to drive the sliding block to slide linearly, so that the rotary motion of the motor is converted into linear motion. In the existing screw motor, a rotating shaft and a screw rod are connected through a coupler and synchronously rotate.

However, when the screw rod motor is used in practice, the rotation of the motor rotating shaft has certain inertia, the screw rod often can be over-rotated, if the sliding block on the screw rod is blocked by a limit block, the screw rod is over-rotated to cause damage to the screw rod and the screw opening of the sliding block, the accuracy of the sliding block moving can be reduced due to long-time abrasion, and the assembly is not favorable. Especially for large-scale equipment, a motor with larger power is required to be equipped as a driving part, the torsion is larger, the inertia driven by the large-scale equipment during rotation is stronger, the rotation precision of the screw is more difficult to control, the screw and the sliding block are often easily damaged, the service life of the large-scale equipment is shortened, the production cost and the labor intensity are invisibly increased, and the phenomenon needs to be solved.

SUMMERY OF THE UTILITY MODEL

The task of the utility model is to overcome the deficiencies of the prior art and provide a screw rod rotating device which has simple structure and effectively protects the screw rod and can automatically take off the teeth.

In order to achieve the purpose, the utility model is realized by the following technical scheme:

a screw rotating device comprises a motor, a transmission shaft and a screw, wherein the transmission shaft is connected with the screw through an automatic thread-off component, the automatic thread-off component comprises an outer sleeve and an inner cylinder, the outer sleeve is fixedly connected with the transmission shaft, the screw is fixedly connected with the inner cylinder, and the outer sleeve is sleeved outside the inner cylinder and is relatively and fixedly connected with the inner cylinder through an elastic part; in a normal state, the motor drives the transmission shaft to rotate to sequentially drive the outer sleeve, the inner sleeve and the screw to synchronously rotate, when the rotation of the screw is limited, the inner sleeve and the outer sleeve are separated from a fixed connection state, the outer sleeve can slip and rotate outside the inner sleeve, and the automatic tooth removal of the screw is realized;

the elastic piece comprises a spring and a propping block, a link rod through hole is formed in the wall of the outer sleeve, the elastic piece is accommodated in the link rod through hole, one end of the spring is fixed in a limiting manner, the other end of the spring props against the propping block, and the propping block can move up and down along the link rod through hole; one or more clamping and scratching grooves are correspondingly arranged on the outer wall of the inner cylinder, the bottom of the abutting block is contained in the clamping and scratching groove, at least one side of the clamping and scratching groove is an inclined surface, and the abutting block can slide out of the clamping and scratching groove and slide along the outer wall of the inner cylinder;

the middle part of the inner cylinder is fixedly connected with the end part of the screw rod, and the connection mode can be integrated molding or assembly connection.

Furthermore, the abutting block is in a wedge-shaped block shape, the bottom of the abutting block is provided with an oblique angle, and the abutting block is integrally divided into an upper fixing part and a lower scribing part, wherein the upper fixing part is accommodated in the through hole of the link rod, the cross section of the lower scribing part is in a trapezoid accommodating clamping groove, and the lower scribing part is provided with an abutting block vertical edge, an abutting block bottom edge and an abutting block oblique edge; the shape of the clamping groove is matched with the abutting block, the groove cavity of the clamping groove is provided with a clamping groove vertical surface, a clamping groove bottom surface and a clamping groove inclined surface, the abutting block vertical edge abuts against the clamping groove vertical surface, the abutting block bottom edge abuts against the clamping groove bottom surface, and the abutting block inclined edge abuts against the clamping groove inclined surface.

Further, the axial length of the click groove is greater than the length of the abutment block.

Furthermore, the included angle alpha between the inclined edge of the abutting block and the axis is 15-45 degrees, and preferably about 30 degrees.

Furthermore, the outer sleeve is cylindrical and is divided into a coupling section and a link section, a shaft accommodating cavity is axially arranged in the middle of the coupling section, a rod accommodating cavity is axially arranged in the middle of the link section, a transmission shaft of the motor is accommodated in the shaft accommodating cavity and fixedly connected with the coupling section, and the inner sleeve is accommodated in the link section and relatively fixedly connected with the link section through an elastic piece.

Furthermore, a key groove or a through shaft end through hole is formed in the end part of the transmission shaft; when the end part of the transmission shaft is provided with a key groove, the coupling section is provided with a coupling groove with an outward opening corresponding to the inner wall, and a coupling key is plugged between the key groove and the coupling groove to realize the fixed connection of the transmission shaft and the outer sleeve; when the end part of the transmission shaft is provided with the shaft end through hole, the coupling section is correspondingly provided with the radial coupling through hole, and the pin rod is arranged to penetrate through the shaft end through hole and the coupling through hole so as to realize the fixed connection of the transmission shaft and the outer sleeve.

Furthermore, a pressing plate is arranged above the through hole of the link rod, the pressing plate is fixedly arranged on the outer sleeve, and the spring is abutted against the pressing plate to realize end limiting.

Further, the elastic part still includes the inserted bar, and its pole portion passes the spring, and the bottom is inserted and is leaned on in the piece and with to lean on the piece spiro union fixed, leans on the inserted bar groove that is equipped with the opening towards the spring in the middle part of the piece, still corresponds on the clamp plate and is equipped with the inserted bar through-hole.

Compared with the prior art, the beneficial effects of the utility model are as follows:

1. the utility model discloses in, the screw rod is not fixed connection with the transmission shaft, but through the automatic relative fixed connection of tooth subassembly that takes off, normal conditions is screw rod and transmission shaft synchronous revolution, when the screw rod is rotatory when being restricted, and the screw rod breaks away from with the transmission shaft and is connected, and the screw rod can not be crossed along with the transmission shaft and change to this protection screw rod. The loss of the original screw rod is replaced by the elastic part, the elastic part is low in price and easy to replace, and the production cost is indirectly reduced.

2. The utility model discloses in, the elastic component by the spring, support to lean on the block to constitute, the spring provides tension and makes and support to advance the card and draw the groove to leaning on the block card, normally support block and inner tube synchronous revolution, when inner tube (screw rod) by the restriction when rotatory, the card draw the groove and support the inclined plane design of block and make and support the block because of the rotatory roll-off card draw the groove of outer sleeve, support and lean on the block by the extrusion shrink, the outer sleeve can skid the idle running outside the inner tube, so, the screw rod is stop state, the transmission shaft is the inertial rotation state, the two mutual noninterference, all can protect. Through the cooperation of the abutting block and the clamping groove on the inner barrel, the automatic thread-off effect of the screw is ingeniously realized, and the design is ingenious and effective.

3. The axial length of the designed clamping groove is greater than the length of the abutting block, the inner cylinder with the screw rod can be adjusted forwards and backwards according to actual working requirements, and the abutting block can be abutted to the clamping groove, so that the distance installation precision between the motor and the screw rod can be reduced, and the assembling and installation of equipment are facilitated.

4. When the end part of the transmission shaft is connected with the coupling section of the outer sleeve through the pin rod, one-step limiting fixation can be realized in the axial direction and the circumferential direction, the connection mode is more convenient and effective, and the circumferential synchronous rotation is ensured while the front and back sliding is avoided.

5. The inserted bar with support to support piece fixed connection, when supporting to support the piece and slided out the card and cut the groove, the inserted bar can be by its top protrusion in clamp plate of jack-up, does the warning effect, tells the staff promptly, the screw rod condition of skidding has taken place.

In a word, the utility model provides a screw rod rotary device, screw rod and the direct fixed connection of transmission shaft non-, but through the automatic relative fixed connection of tooth subassembly that takes off, when the screw rod rotation received the resistance, can take off the tooth automatically, synchronous revolution when having ensured the normal atress of screw rod promptly has avoided its unusual atress to bring the loss again, reasonable in design, ingenious, this device can use in each manufacturing equipment, and the range of application is extensive.

Drawings

Fig. 1 is a schematic view of an overall structure of a first embodiment of the present invention.

Fig. 2 is an exploded view of a first embodiment of the present invention.

Fig. 3 is a schematic structural view of an outer sleeve of a middle sleeve and an outer sleeve according to an embodiment of the present invention.

Fig. 4 is a cross-sectional view of an outer sleeve according to an embodiment of the present invention.

Fig. 5 is a schematic structural view of an inner cylinder and a screw rod in a first embodiment of the present invention.

Fig. 6 is a cross-sectional view of an inner tube according to a first embodiment of the present invention.

Fig. 7 is a schematic structural diagram of an abutting block in the first embodiment of the present invention.

Fig. 8 is a cross-sectional view of an abutment block according to a first embodiment of the present invention.

Fig. 9 is an overall sectional view of a first embodiment of the present invention.

Fig. 10 is an overall sectional view of a second embodiment of the present invention.

Fig. 11 is a cross-sectional view of an outer sleeve according to a second embodiment of the present invention.

Fig. 12 is a schematic view of the overall structure of the third embodiment of the present invention.

Fig. 13 is a schematic structural diagram of a mounting seat in a third embodiment of the present invention.

The labels in the figure are: 1. a drive mechanism; 2. a drive shaft; 21. a keyway; 22. a shaft end through hole; 3. a screw; 4. An automatic tooth-disengaging assembly; 41. an outer sleeve; 411. a coupling section; 412. a link section; 413. a shaft accommodating cavity; 414. A rod-containing cavity; 415. a coupling through hole; 416. a link rod through hole; 417. a shaft connecting groove; 418. a shaft coupling key; 419. A pin rod; 42. an inner barrel; 421. a clamping and scratching groove; 4211. a vertical surface of the clamping groove; 4212. the bottom surface of the clipping groove; 4213. A card cutting groove inclined plane; 43. an elastic member; 431. inserting a rod; 432. a spring; 433. a leaning block; 4331. an upper fixing part; 4332. a lower-dividing part; 4333. a vertical edge of the abutting block; 4334. against the bottom edge of the block; 4335. abutting against the block bevel edge; 4336. a plug-in rod slot; 44. pressing a plate; 441. a through hole for the insertion rod; 5. a mounting seat; 51. mounting a through hole; 52. Mounting a screw hole; 53. a supporting seat; 6. a plug-in mounting device; 7. a threaded sleeve; 8. a bearing; 9. a master device.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and preferred embodiments.

It is noted that the terms "front", "back", "top", "bottom", "upper", "lower", and the like in the description and in the claims of the present invention are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that such structures are interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the term "comprises" and any variations thereof is intended to cover non-exclusive inclusions.

Example one

As shown in fig. 1-9, the present embodiment provides a screw rotating device, which includes a motor 1, a transmission shaft 2 and a screw 3, wherein the transmission shaft 2 is connected to the screw 3 through an automatic thread-removing assembly 4, the automatic thread-removing assembly 4 includes an outer sleeve 41 and an inner cylinder 42, the outer sleeve 41 is fixedly connected to the transmission shaft 2, the screw 3 is fixedly connected to the inner cylinder 42, and the outer sleeve 41 is sleeved outside the inner cylinder 42 and relatively fixedly connected to the inner cylinder 42 through an elastic member 43; in a normal state, the motor 1 drives the transmission shaft 2 to rotate, the outer sleeve 41, the inner cylinder 42 and the screw 3 are sequentially driven to synchronously rotate, when the rotation of the screw 3 is limited, the inner cylinder 42 and the outer sleeve 41 are separated from a fixed connection state, the outer sleeve 41 can unidirectionally rotate and slide outside the inner cylinder 42, and the automatic tooth-disengaging of the screw is realized.

The motor 1 can be a motor, an electric cylinder, an electric drill, a hydraulic press and the like which drive a transmission shaft to rotate along the axial direction.

The axial direction in this embodiment refers to the axial direction of the rotation shaft of the motor.

When general lead screw motor was in the in-service use, the motor shaft rotation had certain inertia, and the phenomenon often can appear crossing changeing to the screw rod, and if slider on the screw rod is died by spacing card, the screw rod crosses changeing can lead to the fact the damage to the silk mouth of screw rod and slider, and long-time wearing and tearing can reduce the precision that the slider removed, are very unfavorable to the assembly. Especially for large-scale equipment, a motor with larger power is required to be equipped as a driving part, the torsion is larger, the inertia driven by the large-scale equipment during rotation is stronger, the rotation precision of the screw is more difficult to control, the screw and the sliding block are often easily damaged, the service life of the large-scale equipment is shortened, the production cost and the labor intensity are invisibly increased, and the phenomenon needs to be solved.

The utility model discloses in, screw rod 3 is not fixed connection with transmission shaft 2, but through the automatic relative fixed connection of tooth subassembly 4 that takes off, normal conditions is screw rod and transmission shaft synchronous revolution, when the screw rod is rotatory limited, screw rod 3 and transmission shaft 2 break away from the connection, and screw rod 3 can not be along with transmission shaft 2 and cross the commentaries on classics to this protection screw rod 2. The loss of the original screw rod 2 is replaced by the elastic part 4, the elastic part 4 is cheap and easy to replace, and the production cost is indirectly reduced.

In this embodiment, the outer sleeve 41 is cylindrical, has a cavity in the middle, and is an integrally formed structure, which is divided into a coupling section 411 and a coupling section 412, as shown in the figure, the coupling section 411 is above the dotted line, the coupling section 412 is below the dotted line, a shaft accommodating cavity 413 is axially arranged in the middle of the coupling section 411, a rod accommodating cavity 414 is axially arranged in the middle of the coupling section 412, and the shaft accommodating cavity 413 and the rod accommodating cavity 414 are communicated with each other, so as to facilitate processing, but certainly not communicated with each other, and not affect the operation of each component. The transmission shaft 2 of the motor 1 is accommodated in the shaft accommodating cavity 413 and is fixedly connected with the coupling section 411, and the inner cylinder 42 is accommodated in the link section 412 and is relatively fixedly connected with the link section 412 through the elastic member 43.

In this embodiment, a key slot 21 is formed at an end of the transmission shaft 2, the coupling section 411 is provided with a coupling slot 417 having an outward opening on an inner wall thereof, and a coupling key 418 is inserted between the key slot 21 and the coupling slot 417 to realize a fixed circumferential coupling between the transmission shaft 2 and the outer sleeve 41. In this case, a hole can be additionally formed to insert a detent (not shown) to limit the forward and backward sliding of the outer sleeve 41 relative to the drive shaft 2.

The inner cylinder 42 is cylindrical, and one or more clamping and scratching grooves 421 are arranged on the outer peripheral wall of the inner cylinder; the middle part of the inner cylinder 42 is fixedly connected with the end part of the screw rod 3, and the connection mode can be integrated molding or assembly connection. The assembled connection can be a clamping/screw connection type, and even can be a coupling connection type, the inner cylinder 42 faces one side of the screw rod 3, and the middle part of the inner cylinder extends outwards to form a convex connection part. The inner barrel 42 can be provided as a modular component for later replacement, installation and sale. (the screw threads of some of the figures are not shown, but should not affect understanding)

In this embodiment, the elastic element 43 includes a spring 432 and an abutting block 433, a link rod through hole 416 is formed in the cylinder wall of the outer sleeve 41, the elastic element 43 is accommodated in the link rod through hole 416, one end of the spring 432 is fixed in a limiting manner, the other end of the spring 432 abuts against the abutting block 433, and the abutting block 433 can move up and down along the link rod through hole 416; the outer wall of the inner cylinder 42 is correspondingly provided with a clamping and scratching groove 421, the bottom of the abutting block 433 is accommodated in the clamping and scratching groove 421, at least one side of the clamping and scratching groove 421 is an inclined surface, and the abutting block 433 can slide out of the clamping and scratching groove 421 and slide along the outer wall of the inner cylinder 42.

The abutting block 433 is wedge-shaped and block-shaped, the section is square or circular, the bottom is provided with an oblique angle, and the whole body is divided into an upper fixed part 4331 and a lower scratching part 4332, wherein the upper fixed part 4331 is accommodated in the link rod through hole 416, the section of the lower scratching part 4332 is accommodated in the clamping groove 421 in a trapezoid shape, and the lower scratching part 4332 is provided with an abutting block vertical edge 4333, an abutting block bottom edge 4334 and an abutting block oblique edge 4335; the shape of the clamping groove 421 is matched with the abutting block 433, the groove cavity is provided with a clamping groove vertical surface 4211, a clamping groove bottom surface 4212 and a clamping groove inclined surface 4213, an abutting block vertical edge 4333 abuts against the clamping groove vertical surface 4211, an abutting block bottom edge 4334 abuts against the clamping groove bottom surface 4212, and an abutting block inclined edge 4335 abuts against the clamping groove inclined surface 4213.

The click-out groove 421 restricts circumferential movement of the abutting block 433 to some extent, both to click the abutting block 433 in the click-out groove 421 and to provide a possibility of slipping out thereof.

In this embodiment, the outer sleeve 41 can slip and rotate clockwise and unidirectionally along the inner cylinder 42, and is limited counterclockwise by the vertical surface, and can be applied to an occasion with relaxed requirement on counterclockwise displacement. The device can be matched with a bearing in actual use, and the screw rod 3 rotates to drive the bearing to move back and forth. If the screw rod 3 rotates clockwise, the bearing moves backwards, and if the screw rod 3 rotates anticlockwise, the bearing moves forwards, and if the requirement of the equipment on the bearing is backward movement limiting, a space can be reserved for forward movement, at this time, the outer sleeve 41 is set to be capable of slipping clockwise, and the anticlockwise is a dead state, namely, the outer sleeve 41 can synchronously rotate clockwise and anticlockwise outside the inner cylinder 42, but can slip and idle clockwise. Under normal conditions, the outer sleeve 41 and the inner cylinder 42 are abutted to rotate synchronously, when the backward movement of the bearing is limited, the outer sleeve 41 and the inner cylinder 42 are separated from abutting fixed connection, and the outer sleeve 41 can slip and rotate outside the inner cylinder 42 in one direction.

However, the outer sleeve 41 is not limited thereto, and both sides of the abutting block 433 of the elastic member 43 may be provided with slopes, so that the outer sleeve 41 can also be slid in two directions to meet different equipment requirements.

The axial length of the click groove 421 is greater than the length of the abutment block 433. The inner cylinder 42 and the screw 3 can be adjusted back and forth according to actual working requirements, and only the abutting block 433 can abut against the clamping groove 421, so that the distance installation accuracy between the motor 1 and the screw 3 can be reduced, and the assembly and installation of equipment are facilitated.

The included angle alpha between the inclined edge 4335 of the abutting block and the axis is 15-45 degrees, and preferably about 30 degrees. The oblique angle is too steep to abut against the block 433 and is difficult to slide out, so that the effect of automatic screw thread disengaging cannot be achieved, the clamping effect of the oblique angle which is too flat to abut against the block 433 is weakened, the oblique angle can easily slide out, and the normal synchronous rotation effect of the outer sliding barrel 41 and the inner barrel 42 cannot be supported.

A pressing plate 44 is arranged above the link rod through hole 416, the pressing plate 44 is fixedly arranged on the outer sleeve 41, and the spring 432 is abutted against the pressing plate 44 to realize end limiting. The pressing plate can be additionally installed on the outer sleeve 41 through screws, and the wall of the outer sleeve 41 is provided with a plane so that the pressing plate can be installed conveniently.

In this embodiment, the elastic member 43 further includes an insertion rod 431, a rod portion of the insertion rod 431 penetrates through the spring 432, the bottom of the insertion rod 431 is inserted into the abutting block 433 and is fixed to the abutting block 433 in a threaded manner, an insertion rod groove 4336 with an opening facing the spring is formed in the middle of the abutting block 433, and an insertion rod through hole 441 is correspondingly formed in the pressing plate 44. Of course, the insertion rod 431 may not be provided, and the up-and-down movement of the abutting block 433 may not be affected. The inserted bar 431 is fixedly connected with the abutting block 433, when the abutting block 433 slides out of the clamping groove 421, the inserted bar 431 can be jacked up to enable the top end of the inserted bar to protrude out of the pressing plate 44, a warning effect is achieved, a worker is informed of the fact that the screw slips, during subsequent operation, the screw needs to be noticed to rotate to the end, and the motor execution error is avoided.

When the device is in actual use, the strength of the spring is used for controlling the friction force when the abutting block 433 is in contact with the clamping groove 421, and the proper spring strength is selected according to specific conditions.

When the device is installed, the motor 1 is installed and fixed firstly; the inner cylinder 42 is firstly inserted into the rod-receiving cavity 414 of the outer sleeve 41, the clipping and scratching groove 421 is aligned with the link rod through hole 416, then the abutting block 433 is inserted from the link rod through hole 416, so that the upper fixing part 4331 is received in the link rod through hole 416, the lower scratching part 4332 is received in the clipping and scratching groove 421, then the spring 432 is inserted into the link rod through hole 416, then the upper pressing plate 44 is installed, the spring 432 is sealed between the pressing plate 44 and the abutting block 433, and finally the inserting rod 431 is inserted into the pressing plate 44 and the spring 432 until being fixed with the abutting block 433 in a threaded manner. Then, the shaft accommodating cavity 413 of the outer sleeve 41 is sleeved outside the transmission shaft 2 of the motor 1, the coupling key 418 is inserted from the coupling groove 417 to circumferentially limit the outer sleeve 41 (a clamping member can be radially inserted to axially limit the outer sleeve 41), and the assembly of the device is completed.

Example two

As shown in fig. 10-11, the present embodiment is different from the first embodiment in the connection manner of the outer sleeve 41 and the transmission shaft 2. In this embodiment, the end of the transmission shaft 2 is provided with a through shaft end through hole (not shown), the coupling section 411 is correspondingly provided with a radial coupling through hole 415, and a pin 419 is arranged to penetrate through the shaft end through hole and the coupling through hole 415 to realize the fixed coupling of the transmission shaft 2 and the outer sleeve 41 in the axial and circumferential directions. The pressure plate 44 can be additionally arranged on the outer sleeve 41 through screws, and the wall of the outer sleeve 41 is provided with a plane so as to facilitate the installation of the pressure plate; when the transmission shaft 2 is connected with the outer sleeve 41 through a pin, a screw thread can be arranged on the pin rod 419, a screw hole is correspondingly arranged on the pressing plate, and a screw thread can be arranged on the inner wall of the coupling through hole 415, so that the pressing plate is fixed on the outer sleeve 41 through the pin rod. In this embodiment, two elastic members 43 are symmetrically arranged, two pressing plates are correspondingly arranged, the inner wall of the coupling through hole 415 may not be provided with a thread, and the pin rod is clamped between the two pressing plates by screwing the two ends of the pin rod with the two pressing plates 44.

When the outer sleeve 41 of the present embodiment is mounted on the transmission shaft 2, the coupling through hole 415 is aligned with the shaft end through hole, and the pin 419 passes through the coupling through hole 415 and the shaft end through hole in sequence, and is screwed and fixed with the pressing plate 44 and/or the outer sleeve 41, thereby completing the assembly.

EXAMPLE III

The embodiment provides a specific application scene of the screw rotating device with the automatic tooth removal function.

As shown in fig. 12-13, in the present embodiment, the screw rotating device for automatic tooth stripping is applied to the mold processing field, but actually, the screw rotating device is not limited to this field, the motor 1 is fixed on the main device 9 through the mounting seat 5, the screw 3 is connected with the insertion device 6, and the screw 3 is required to rotate to drive the insertion device 6 to move back and forth integrally, so that other components connected to the insertion device 6 can move back and forth to perform the assembling operation with the main device 9.

The mount pad 5 is the cyclic annular structure of interior round foreign side, and the middle part is axial installation through-hole 51, corresponds motor 1 on the mount pad 5 and is equipped with installation screw 52, and mount pad 5 passes through bolt fixed connection with motor 1, and transmission shaft 2 passes installation through-hole 51 and links to each other with automatic tooth subassembly 4 of taking off, and outer sleeve 41 is towards the one end undergauge holding of motor 1 in this installation through-hole 51, and mount pad 5 can also play the effect that the direction was supported this moment. One side of mount pad 5 outwards extends and forms supporting seat 53, and supporting seat 53 has supported motor 1 with the cooperation equipment of primary equipment 9, and supporting seat 53 is T shape structure in this embodiment, can correspond on the primary equipment 9 and set up T type groove platform, and supporting seat 53 directly inclines to insert into and can realize the supporting effect.

Of course, the mounting method of the motor is not limited to this, and the motor may be directly mounted separately without being connected to the main unit 9 via the mount 5.

When the device works actually, the screw rod is generally provided with a bearing, the bearing is connected with other components and can move synchronously, when the screw rod rotates, the bearing moves back and forth along the axial direction of the screw rod, when the screw rod stops rotating, the bearing stops moving, when the position of the bearing is limited, the screw rod is in a rotation stop state, the inertia over-rotation of the transmission shaft 2 is digested by the automatic tooth-removing component 4, the outer sleeve 41 can unidirectionally beat, slide and idle outside the inner cylinder 42, so the screw rod 3 is in a stop state, the transmission shaft 2 is in an inertia rotation state, and the two are not interfered with each other and can be protected.

In this embodiment, a threaded sleeve 7 and a bearing 8 are fixedly arranged on the insertion device 6 in a penetrating manner, the threaded sleeve 7 and the bearing 8 are respectively screwed on the screw rod 3, and when the screw rod 3 is driven to rotate by the motor 1, the threaded sleeve 7 and the bearing 8 are converted into linear motion due to screwing to generate front and back displacement, so that the insertion device 6 is driven to move back and forth.

In this embodiment, the screw 3 is rotated clockwise and the cartridge 6 is moved towards the main apparatus 9, i.e. backwards, and when the screw 3 is rotated anticlockwise, the cartridge 6 is moved away from the main apparatus 9, i.e. forwards. When the maximum displacement of the insertion device 6 in the backward direction is against the main installation, there is no tolerance space. The space for the forward movement of the insertion device 6 is large, and the displacement does not need to be accurately controlled. The direction of displacement of the insertion device 6 caused by the direction of rotation of the screw 3 is given by way of example only and is not limiting.

As can be seen from the figure, the insertion device 6 is relatively thick and heavy, the selected motor is a hydraulic pump with relatively high power, the torque is relatively large, the rotation inertia is relatively large, the rotation precision of the screw is relatively difficult to control, if a conventional connection mode is adopted, the screw 3 is directly connected with the transmission shaft 2 of the motor 1, the transmission shaft 2 still has inertia over-rotation when the motor stops rotating, at the moment, the screw openings between the screw 3 and the screw sleeve 7 and the bearing 8 bear opposite acting forces, and the contact screw openings between the screw 3 and the screw sleeve 7 and the bearing 8 are damaged. The service life of the screw 3, the thread insert 7 and the bearing 8 will be shortened for a long time. Adopted the utility model discloses an automatic take off behind the screw rod rotary device of tooth, when cartridge device 6 offseted with the main equipment, screw rod 3 and transmission shaft 2 break away from the connection, and screw rod 3 can not be along with transmission shaft 2 and cross the commentaries on classics to this protection screw rod 2. The loss of the original screw rod 2 is replaced by the elastic part 4, the elastic part 4 is cheap and easy to replace, and the production cost is indirectly reduced.

It should be finally noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.

Claims (8)

1. A screw rotating device comprises a motor (1), a transmission shaft (2) and a screw (3), and is characterized in that the transmission shaft (2) is connected with the screw (3) through a component (4), wherein the component (4) comprises an outer sleeve (41) and an inner cylinder (42), the outer sleeve (41) is fixedly connected with the transmission shaft (2), the screw (3) is fixedly connected with the inner cylinder (42), and the outer sleeve (41) is sleeved outside the inner cylinder (42) and is relatively fixedly connected with the inner cylinder (42) through an elastic part (43); in a normal state, the motor (1) drives the transmission shaft (2) to rotate to sequentially drive the outer sleeve (41), the inner sleeve (42) and the screw (3) to synchronously rotate, when the screw (3) is limited to rotate, the inner sleeve (42) and the outer sleeve (41) are separated from a fixed connection state, and the outer sleeve (41) can rotate outside the inner sleeve (42) in a sliding manner to realize automatic tooth removal of the screw;

the elastic part (43) comprises a spring (432) and an abutting block (433), a link rod through hole (416) is formed in the cylinder wall of the outer sleeve (41), the elastic part (43) is accommodated in the link rod through hole (416), one end of the spring (432) is limited and fixed, the other end of the spring (432) abuts against the abutting block (433), and the abutting block (433) can move up and down along the link rod through hole (416); one or more clamping and scratching grooves (421) are correspondingly arranged on the outer wall of the inner cylinder (42), the bottom of the abutting block (433) is contained in the clamping and scratching groove (421), at least one side of the clamping and scratching groove (421) is an inclined surface, and the abutting block (433) can slide out of the clamping and scratching groove (421) and slide along the outer wall of the inner cylinder (42);

the middle part of the inner cylinder (42) is fixedly connected with the end part of the screw rod (3), and the connection mode can be integrated or assembled.

2. Screw rotary device according to claim 1, characterized in that the abutment block (433) is wedge-shaped and has a bevelled bottom, which is integrally divided into an upper fixing portion (4331) and a lower cutting portion (4332), wherein the upper fixing portion (4331) is received in the link through hole (416), the lower cutting portion (4332) has a trapezoidal cross-section received in the clipping groove (421), and the lower cutting portion (4332) has an abutment block vertical edge (4333), an abutment block bottom edge (4334) and an abutment block bevelled edge (4335); the shape of the clamping groove (421) is matched with that of the abutting block (433), the groove cavity of the clamping groove is provided with a clamping groove vertical surface (4211), a clamping groove bottom surface (4212) and a clamping groove inclined surface (4213), the abutting block vertical edge (4333) is attached to the clamping groove vertical surface (4211), the abutting block bottom edge (4334) is abutted to the clamping groove bottom surface (4212), and the abutting block inclined edge (4335) is attached to the clamping groove inclined surface (4213).

3. Screw rotating device according to claim 2, wherein the axial length of the click-through groove (421) is greater than the length of the abutment block (433).

4. Screw rotation device according to claim 3, wherein the angle α between the oblique edge (4335) of the abutment block and the axis is 15-45 °.

5. Screw rotating device according to claim 2 or 3 or 4, characterized in that the outer sleeve (41) is cylindrical and is divided into a coupling section (411) and a coupling section (412), a shaft accommodating cavity (413) is axially arranged in the middle of the coupling section (411), a rod accommodating cavity (414) is axially arranged in the middle of the coupling section (412), wherein the transmission shaft (2) of the motor (1) is accommodated in the shaft accommodating cavity (413) and is fixedly connected with the coupling section (411), and the inner sleeve (42) is accommodated in the coupling section (412) and is relatively fixedly connected with the coupling section (412) through an elastic element (43).

6. Screw rotation device according to claim 5, characterized in that the end of the drive shaft (2) is provided with a keyway (21) or a through-going shaft end through-hole (22); when the end part of the transmission shaft (2) is provided with the key slot (21), the coupling section (411) is correspondingly provided with a coupling slot (417) with an outward opening on the inner wall, and a coupling key (418) is plugged between the key slot (21) and the coupling slot (417) to realize the fixed connection of the transmission shaft (2) and the outer sleeve (41); when the end part of the transmission shaft (2) is provided with the shaft end through hole (22), the coupling section (411) is correspondingly provided with a radial coupling through hole (415), and a pin rod (419) is arranged to penetrate through the shaft end through hole and the coupling through hole (415) so as to realize the fixed connection of the transmission shaft (2) and the outer sleeve (41).

7. Screw rotating device according to claim 1, wherein a pressure plate (44) is arranged above the link rod through hole (416), the pressure plate (44) is fixedly mounted on the outer sleeve (41), and the spring (432) abuts against the pressure plate (44) to realize end limiting.

8. Screw rotating device according to claim 7, wherein the elastic member (43) further comprises an insertion rod (431) having a rod portion passing through the spring (432), a bottom portion inserted into the abutting block (433) and fixed to the abutting block (433) by screwing, an insertion rod groove (4336) having an opening facing the spring is formed in the middle portion of the abutting block (433), and an insertion rod through hole (441) is correspondingly formed in the pressing plate (44).

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