CN215887346U

CN215887346U - Carding machine with collecting device

Info

Publication number: CN215887346U
Application number: CN202122164731.8U
Authority: CN
Inventors: 张凯锋
Original assignee: Jiangxi Endama Century Technology Co ltd
Current assignee: Jiangxi Endama Century Technology Co ltd
Priority date: 2021-09-08
Filing date: 2021-09-08
Publication date: 2022-02-22
Anticipated expiration: 2031-09-08

Abstract

The utility model provides a carding machine with a collecting device, comprising: the base, the upper end both sides of base are provided with the stand, and the upper end of stand is provided with the roof beam board, the inboard of stand is provided with the second motor, and the right-hand member of second motor is connected with the initiative tooth to the upper end meshing of initiative tooth has driven tooth, the internal connection of driven tooth has the pivot, and the upper end of pivot passes the backup pad and is connected with the rolling disc, the both ends of rolling disc are provided with fixed subassembly, and the inboard of fixed subassembly is provided with the surge drum, the outside of stand is provided with the cylinder, and the inboard of cylinder is connected with stabilising arrangement through the telescopic link. The utility model solves the problems that the cotton sliver provided by the patent document in the background art is easy to expand and enlarge in volume in the collecting process, occupies more cotton cylinder space, is in an unstable state in the rotating process and is not beneficial to uniform arrangement.

Description

Carding machine with collecting device

Technical Field

The utility model relates to the technical field of textile equipment, in particular to a carding machine with a collecting device.

Background

The cotton yarn spinning comprises the steps of firstly, grabbing and cleaning cotton raw material bundles of raw materials, then, loosening and carding the cleaned cotton, obtaining preliminary cotton slivers after multiple loosening and carding processes, sending the cotton slivers to a combing machine for combing to obtain a final finished product, opening and carding cotton rolls by the combing machine and removing impurities, enabling all curled blocky cotton rings to be in a basically straightened single fiber shape, removing broken seeds, impurities and short fibers left in the cotton opening process in the process, then, integrating the cotton slivers with certain specifications, storing the cotton slivers in a cotton cylinder and using the cotton slivers for the drawing process.

The prior Chinese patent with publication number CN209024695U discloses a collecting device for a carding machine, which comprises a frame, a cotton cylinder, a rotating roller and a first motor, wherein a reciprocating screw rod is arranged above the cotton cylinder, and one end of the reciprocating screw rod is connected with a driving part for driving the reciprocating screw rod to rotate; the reciprocating screw rod is sleeved with a sliding block in threaded fit with the reciprocating screw rod; the sliding block is provided with a traction ring for driving the cotton sliver to move; the frame is provided with a limiting component which enables the sliding block to do linear reciprocating motion only along the axial direction of the reciprocating screw rod; a rotating mechanism which enables the cotton cylinder to rotate is arranged below the frame. The first motor drives the rotating roller to rotate, so that the cotton sliver falls into the cotton cylinder stably. The driving part drives the reciprocating screw rod to rotate, and the sliding block and the traction ring do reciprocating linear motion along the axial direction of the reciprocating screw rod under the limiting of the limiting assembly; the cotton cylinder is driven by the rotating mechanism to rotate slowly. Under the combined action of the rotation of the cotton cylinder and the traction ring, the cotton slivers are uniformly distributed in the cotton cylinder, and the utilization rate of the storage space in the cotton cylinder is improved.

Although the above patent documents disclose a uniform arrangement of the tampon inside the barrel, there are still some disadvantages:

1. in the process that the cotton sliver enters the cotton cylinder through the rotating roller and the traction ring, the compressed cotton sliver is easy to expand and increase in volume, so that more space of the cotton cylinder is occupied, and the collection utilization rate of the cotton cylinder is not improved;

2. the cotton section of thick bamboo is directly placed on the rolling disc, and along with the accumulation of the inside silver of cotton section of thick bamboo, cotton section of thick bamboo center risees, leads to cotton section of thick bamboo to rotate and is in unstable state, and then is unfavorable for evenly arranging.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, the carding machine with the collecting device is provided so as to solve the problems that the cotton sliver provided in the patent document in the background art is easy to expand and has larger volume and occupies more space of the cotton cylinder in the collecting process, and the cotton cylinder is in an unstable state in the rotating process and is not beneficial to uniform arrangement.

In order to achieve the above object, there is provided a carding machine having a collecting device, comprising:

the base, the upper end both sides of base are provided with the stand, and the upper end of stand is provided with the roof beam board, the inboard of stand is provided with the second motor, and the right-hand member of second motor is connected with the initiative tooth to the upper end meshing of initiative tooth has driven tooth, the internal connection of driven tooth has the pivot, and the upper end of pivot passes the backup pad and is connected with the rolling disc, the both ends of rolling disc are provided with fixed subassembly, and the inboard of fixed subassembly is provided with the surge drum, the outside of stand is provided with the cylinder, and the inboard of cylinder is connected with stabilising arrangement through the telescopic link, the upside of surge drum is provided with the slide bar, and the sliding surface of slide bar is connected with the sliding sleeve to the front end of sliding sleeve is fixed with the threading section of thick bamboo, the upper end of roof beam board is provided with vertical clamping device, and vertical clamping device's right side is provided with horizontal clamping device.

Furthermore, the lower extreme both sides of rolling disc are provided with the stabilizer blade, and the lower extreme of stabilizer blade rotates and is connected with the sliding ball to sliding ball and backup pad up end contact slip, and the inboard at the stand is fixed at the both ends of backup pad.

Further, the lower extreme of a collecting cylinder is provided with the bobbin base portion, and bobbin base portion lower extreme both sides are fixed with participates in to the outside of participating in is seted up jaggedly.

Furthermore, fixed subassembly setting is including seting up the vertical slot in the rolling disc inside perpendicularly, and vertical slot matches with the position of participating in to the horizontal slot of intercommunication is seted up in the outside of vertical slot, and the inside grafting of horizontal slot has the draw-in lever portion.

Furthermore, the outer end of the clamping rod part is connected with a holding rod part of a clip structure, the lower end of the holding rod part is connected with a second sliding block, the second sliding block is connected with a second sliding groove formed in the upper end of the rotating disc in a sliding and clamping mode, and a third spring is arranged in the second sliding groove and the outer end of the second sliding block.

Further, the stabilising arrangement sets up including the arc ring body with telescopic link fixed connection, and the arc wall has been seted up to the inside of arc ring body, and the inside packing of arc wall has the blotter, and the inboard of arc wall is provided with inside bellied ball.

Furthermore, the upper end of the sliding sleeve is connected with a connecting rod which inclines forwards, the upper end of the connecting rod is connected with a nut sleeve, the inner side of the nut sleeve is connected with a screw rod in a threaded mode, and the left end of the screw rod penetrates through the upright column and is connected with a first motor.

Further, the inside of roof beam board and seted up the wire casing at vertical clamping device's downside, and vertical clamping device sets up including fixing the branch in roof beam board upper end, and the inside rotation of branch is connected with fore-and-aft conveying roller, and the surface of conveying roller just overlaps at the inboard cover of branch and is equipped with first spring to just be connected with pinch roller in the inboard of first spring and at the surperficial sliding connection of conveying roller.

Further, the transverse clamping device is provided with a hinged rod which is connected with the top beam plate in a front-back rotating mode, the inner side of the hinged rod is connected with an elastic wheel through a shaft rod, the elastic wheel is located between the two clamping wheels in the overlooking direction, the right end of the hinged rod is hinged with a sliding shaft, the sliding shaft penetrates through a sliding plate and a stabilizing block in a sliding mode, the sliding plate is connected with the top beam plate in a sliding mode through a first sliding block connected with the bottom end and a first sliding groove formed in the two sides of the top beam plate, a positioning bolt is arranged at the front end of the first sliding block, the stabilizing block is fixed at the front end and the rear end of the top beam plate, a second spring is arranged between the hinged rod and the sliding plate, and a limiting ring is arranged at the rear end of the sliding shaft.

The utility model has the beneficial effects that:

1. the carding machine with the collecting device further longitudinally clamps the passing cotton sliver by utilizing the clamping wheel included by the longitudinal clamping device, and further transversely clamps the passing cotton sliver by the combined action of the elastic wheel included by the adjustable transverse clamping device and the conveying roller, so that the volume expansion is reduced in the cotton sliver conveying process, the internal space of the collecting cylinder is excessively occupied, and the utilization rate of the collecting cylinder is improved;

2. the first motor, the screw rod, the sliding rod, the nut sleeve and the sliding sleeve are used for conveniently driving the threading cylinder to reciprocate, so that the cotton sliver can achieve the effect of swinging and downward conveying, the second motor, the driving teeth, the driven teeth and the rotating shaft are used for conveniently driving the rotating disc to move and rotate at a constant speed, and the cotton sliver is uniformly arranged in the collecting cylinder;

3. utilize the joint pole that fixed subassembly includes, the holding rod, participate in, the breach, second slider and second spout, it is fixed to be connected and plug with the rolling disc fast to be convenient for the collecting vessel, it rotates to be convenient for the rolling disc drives the collecting vessel, and be convenient for installation and dismantlement, through the stabilizer blade, smooth ball and backup pad, be convenient for form the stable support to the rolling disc, utilize the inside centre gripping of cylinder drive stabilising arrangement, and through the arc ring body that stabilising arrangement includes, the arc wall, blotter and ball, make collecting vessel outer surface and ball elastic contact, be convenient for strengthen collecting vessel pivoted stability, and then be favorable to evenly arranging.

Drawings

Fig. 1 is a schematic structural view of a carding machine with a collecting device according to an embodiment of the utility model.

Fig. 2 is a schematic top view of a top beam plate according to an embodiment of the present invention.

Fig. 3 is a schematic top view of a stabilizing device according to an embodiment of the present invention.

Fig. 4 is a schematic view of a portion a in fig. 1 according to an embodiment of the present invention.

1. A base; 2. a column; 3. a stabilizing device; 31. an arcuate ring body; 32. an arc-shaped slot; 33. a cushion pad; 34. a ball bearing; 4. a telescopic rod; 5. a cylinder; 6. a first motor; 7. a slide bar; 8. a screw rod; 9. a nut sleeve; 10. a longitudinal clamping device; 101. a conveying roller; 102. a strut; 103. a first spring; 104. a pinch wheel; 11. a lateral clamping device; 111. an elastic wheel; 112. a hinged lever; 113. a second spring; 114. a slide plate; 115. a slide shaft; 116. a stabilizing block; 117. a limiting ring; 12. positioning the bolt; 13. a first chute; 14. a first slider; 15. a connecting rod; 16. a sliding sleeve; 17. a threading cylinder; 18. a collection canister; 19. a support leg; 20. a sliding bead; 21. rotating the disc; 22. a support plate; 23. a rotating shaft; 24. a driven tooth; 25. a driving tooth; 26. a second motor; 27. a roof rail panel; 28. a wire passing groove; 29. the bottom of the cylinder; 30. a fixing assembly; 301. a pin; 302. a longitudinal slot; 303. a notch; 304. a transverse slot; 305. a clamping rod part; 306. a second chute; 307. a second slider; 308. a third spring; 309. the rod part is held.

Detailed Description

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The utility model is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.

Fig. 1 is a schematic structural view of a carding machine with a collecting device according to an embodiment of the present invention, fig. 2 is a schematic structural view of a top beam plate according to an embodiment of the present invention, fig. 3 is a schematic structural view of a stabilizing device according to an embodiment of the present invention, and fig. 4 is a schematic structural view of a point a in fig. 1 according to an embodiment of the present invention.

Referring to fig. 1 to 4, the present invention provides a carding machine with a collecting device, including: the device comprises a base 1, a stabilizing device 3, a longitudinal clamping device 10, a transverse clamping device 11 and a fixing assembly 30.

Specifically, two sides of the upper end of the base 1 are provided with upright posts 2, the upper end of the upright post 2 is provided with a top beam plate 27, the inner side of the upright post 2 is provided with a second motor 26, the right end of the second motor 26 is connected with a driving gear 25, and the upper end of the driving tooth 25 is engaged with a driven tooth 24, the interior of the driven tooth 24 is connected with a rotating shaft 23, and the upper end of the rotating shaft 23 is connected with a rotating disc 21 through a supporting plate 22, both ends of the rotating disc 21 are provided with fixing assemblies 30, and the inner side of the fixed component 30 is provided with a collecting cylinder 18, the outer side of the upright post 2 is provided with a cylinder 5, and the inner side of the cylinder 5 is connected with a stabilizing device 3 through a telescopic rod 4, the upper side of the collecting cylinder 18 is provided with a slide bar 7, the surface of the slide bar 7 is connected with a sliding sleeve 16 in a sliding way, and a threading cylinder 17 is fixed at the front end of the sliding sleeve 16, a longitudinal clamping device 10 is arranged at the upper end of the top beam plate 27, and a transverse clamping device 11 is arranged at the right side of the longitudinal clamping device 10.

In the embodiment, the lower end of the rotating shaft 23 is rotatably connected with the base 1 through a shaft seat; a through hole is formed in the middle of the supporting plate 22, so that the rotating shaft 23 can pass through the through hole conveniently; the air cylinders 5 on the two sides of the upright post 2 are set to be of the same specification and model, and are controlled to act through a unified electromagnetic valve; the slide bar 7 is arranged at the lower end of the front side of the screw rod 8.

The two sides of the lower end of the rotating disc 21 are provided with support legs 19, the lower ends of the support legs 19 are rotatably connected with sliding balls 20, the sliding balls 20 slide in contact with the upper end faces of the support plates 22, and the two ends of the support plates 22 are fixed on the inner sides of the upright posts 2.

As a preferred embodiment, the formation of a stable support for the rotating disc 21 is facilitated by the feet 19, the sliding balls 20 and the support plate 22.

The lower end of the collecting cylinder 18 is provided with a cylinder bottom 29, pins 301 are fixed on two sides of the lower end of the cylinder bottom 29, and notches 303 are formed in the outer sides of the pins 301; the fixing component 30 includes a longitudinal slot 302 vertically arranged in the rotating disc 21, the longitudinal slot 302 is matched with the position of the pin 301, a horizontal slot 304 communicated with the longitudinal slot 302 is arranged on the outer side of the longitudinal slot 302, and a clamping rod part 305 is inserted in the horizontal slot 304; the outer end of the clamping rod portion 305 is connected with a holding rod portion 309 with a clip structure, the lower end of the holding rod portion 309 is connected with a second sliding block 307, the second sliding block 307 is clamped with a second sliding groove 306 formed in the upper end of the rotating disc 21 in a sliding mode, and a third spring 308 is arranged inside the second sliding groove 306 and at the outer end of the second sliding block 307.

As a preferred embodiment, the distance between the pins 301 is the same as the distance between the horizontal slots 304, the holding rod 309 facilitates the hand-held operation, the notches 303 of the pins 301 are correspondingly inserted into the clamping rod 305, so as to fix the pins 301, further facilitate the collecting cylinder 18 to be quickly connected with the rotating disc 21, and to be inserted into and fixed, facilitate the rotating disc 21 to drive the collecting cylinder 18 to rotate, and facilitate the installation and the disassembly.

The stabilizing device 3 is provided with an arc ring 31 fixedly connected with the telescopic rod 4, an arc groove 32 is formed in the arc ring 31, a cushion pad 33 is filled in the arc groove 32, and a ball 34 protruding inwards is arranged on the inner side of the arc groove 32.

In a preferred embodiment, the stabilizing device 3 comprises an arc ring 31, an arc groove 32, a cushion 33 and balls 34, so that the outer surface of the collecting cylinder 18 is elastically contacted with the balls 34, which facilitates the stability of the rotation of the collecting cylinder 18.

The upper end of the sliding sleeve 16 is connected with a connecting rod 15 which inclines forwards, the upper end of the connecting rod 15 is connected with a nut sleeve 9, the inner side of the nut sleeve 9 is connected with a screw rod 8 in a threaded mode, and the left end of the screw rod 8 penetrates through the upright post 2 and is connected with a first motor 6.

As a preferred embodiment, the first motor 6, the lead screw 8, the slide bar 7, the nut sleeve 9 and the sliding sleeve 16 are used for driving the thread passing cylinder 17 to reciprocate, so that the cotton sliver is conveyed in a downward swinging manner.

The line passing groove 28 is formed in the top beam plate 27 and on the lower side of the longitudinal clamping device 10, the longitudinal clamping device 10 comprises a support rod 102 fixed to the upper end of the top beam plate 27, a longitudinal conveying roller 101 is rotatably connected to the inside of the support rod 102, a first spring 103 is sleeved on the surface of the conveying roller 101 and on the inner side of the support rod 102, and a clamping wheel 104 is slidably connected to the inner side of the first spring 103 and on the surface of the conveying roller 101.

As a preferred embodiment, the longitudinal clamping device 10 comprises a clamping wheel 104 and a first spring 103, which facilitate further longitudinal clamping of the passing sliver, and the rear end of the conveying roller 101 is connected with a driving device, and the sliver is conveyed through the surface of the conveying roller 101.

The transverse clamping device 11 is provided with an articulated rod 112 which is rotationally connected with the top beam plate 27 in a front-back mode, the inner side of the articulated rod 112 is connected with an elastic wheel 111 through a shaft rod, the elastic wheel 111 is located between the two clamping wheels 104 in the overlooking direction, the right end of the articulated rod 112 is articulated with a sliding shaft 115, the sliding shaft 115 penetrates through a sliding plate 114 and a stabilizing block 116 in a sliding mode, the sliding plate 114 is connected with the top beam plate 27 in a sliding mode through a first sliding block 14 connected with the bottom end and a first sliding groove 13 formed in two sides of the top beam plate 27, a positioning bolt 12 is arranged at the front end of the first sliding block 14, the stabilizing block 116 is fixed at the front end and the rear end of the top beam plate 27, a second spring 113 is arranged between the articulated rod 112 and the sliding plate 114, and a limiting ring 117 is arranged at the rear end of the sliding shaft 115.

Specifically, through the elastic wheel 111 that the adjustable horizontal clamping device 11 includes, with conveying roller 101 combined action, the further horizontal clamping of cotton sliver that will pass through, and through articulated arm 112, second spring 113, slide 114 and sliding shaft 115, be convenient for adjust the centre gripping interval between elastic wheel 111 and the conveying roller 101, and then in the cotton sliver transportation process, reduce the volume expansion, too much occupy the inner space of collecting vessel 18, improve the utilization ratio of collecting vessel 18.

The cotton sliver conveying device can effectively solve the problems that the cotton sliver provided in the patent document of the background art is easy to expand and has larger volume and occupies more space of the cotton sliver in the collecting process, and the cotton sliver is in an unstable state in the rotating process and is not beneficial to uniform arrangement; the first motor, the screw rod, the sliding rod, the nut sleeve and the sliding sleeve are used for conveniently driving the threading cylinder to reciprocate, so that the cotton sliver can achieve the effect of swinging and downward conveying, the second motor, the driving teeth, the driven teeth and the rotating shaft are used for conveniently driving the rotating disc to move and rotate at a constant speed, and the cotton sliver is uniformly arranged in the collecting cylinder; utilize the joint pole that fixed subassembly includes, the holding rod, participate in, the breach, second slider and second spout, it is fixed to be connected and plug with the rolling disc fast to be convenient for the collecting vessel, it rotates to be convenient for the rolling disc drives the collecting vessel, and be convenient for installation and dismantlement, through the stabilizer blade, smooth ball and backup pad, be convenient for form the stable support to the rolling disc, utilize the inside centre gripping of cylinder drive stabilising arrangement, and through the arc ring body that stabilising arrangement includes, the arc wall, blotter and ball, make collecting vessel outer surface and ball elastic contact, be convenient for strengthen collecting vessel pivoted stability, and then be favorable to evenly arranging.

Claims

1. A carding machine with a collecting device is characterized by comprising: the device comprises a base (1), wherein upright columns (2) are arranged on two sides of the upper end of the base (1), a top beam plate (27) is arranged on the upper end of each upright column (2), a second motor (26) is arranged on the inner side of each upright column (2), a driving tooth (25) is connected to the right end of each second motor (26), a driven tooth (24) is meshed with the upper end of each driving tooth (25), a rotating shaft (23) is connected to the inner side of each driven tooth (24), a rotating disc (21) is connected to the upper end of each rotating shaft (23) after penetrating through a supporting plate (22), fixing assemblies (30) are arranged at two ends of each rotating disc (21), a collecting cylinder (18) is arranged on the inner side of each fixing assembly (30), an air cylinder (5) is arranged on the outer side of each upright column (2), a stabilizing device (3) is connected to the inner side of each air cylinder (5) through a telescopic rod (4), a sliding rod (7) is arranged on the upper side of each collecting cylinder (18), and the surface of the sliding rod (7) is connected with a sliding sleeve (16) in a sliding manner, the front end of the sliding sleeve (16) is fixed with a threading cylinder (17), the upper end of the top beam plate (27) is provided with a longitudinal clamping device (10), and the right side of the longitudinal clamping device (10) is provided with a transverse clamping device (11).

2. The carding machine with the collecting device according to claim 1, wherein two sides of the lower end of the rotating disc (21) are provided with support legs (19), the lower ends of the support legs (19) are rotatably connected with sliding balls (20), the sliding balls (20) slide in contact with the upper end face of a support plate (22), and two ends of the support plate (22) are fixed on the inner side of the upright post (2).

3. The carding machine with the collecting device according to claim 1, wherein the lower end of the collecting cylinder (18) is provided with a cylinder bottom (29), pins (301) are fixed on two sides of the lower end of the cylinder bottom (29), and notches (303) are formed on the outer sides of the pins (301).

4. The carding machine with the collecting device according to claim 1, wherein the fixing component (30) is provided with a longitudinal slot (302) vertically arranged inside the rotating disc (21), the longitudinal slot (302) is matched with the pins (301), a communicated transverse slot (304) is arranged outside the longitudinal slot (302), and a clamping rod part (305) is inserted inside the transverse slot (304).

5. The carding machine with the collecting device according to claim 4, wherein the outer end of the clamping rod part (305) is connected with a holding rod part (309) with a clip structure, the lower end of the holding rod part (309) is connected with a second slider (307), the second slider (307) is in sliding clamping connection with a second sliding groove (306) formed in the upper end of the rotating disc (21), and a third spring (308) is arranged in the second sliding groove (306) and at the outer end of the second slider (307).

6. The carding machine with the collecting device according to claim 1, wherein the stabilizing device (3) comprises an arc-shaped ring body (31) fixedly connected with the telescopic rod (4), an arc-shaped groove (32) is formed in the arc-shaped ring body (31), a cushion pad (33) is filled in the arc-shaped groove (32), and balls (34) protruding inwards are arranged on the inner side of the arc-shaped groove (32).

7. The carding machine with the collecting device according to claim 1, wherein the upper end of the sliding sleeve (16) is connected with a connecting rod (15) which inclines forwards, the upper end of the connecting rod (15) is connected with a nut sleeve (9), the inner side of the nut sleeve (9) is screwed with a screw rod (8), and the left end of the screw rod (8) passes through the upright post (2) and is connected with the first motor (6).

8. The carding machine with the collecting device according to claim 1, wherein a wire passing groove (28) is formed in the top beam plate (27) and below the longitudinal clamping device (10), the longitudinal clamping device (10) comprises a support rod (102) fixed to the upper end of the top beam plate (27), the support rod (102) is connected with a longitudinal conveying roller (101) in a rotating mode, a first spring (103) is sleeved on the surface of the conveying roller (101) and on the inner side of the support rod (102), and a clamping wheel (104) is connected on the inner side of the first spring (103) and on the surface of the conveying roller (101) in a sliding mode.

9. The carding machine with the collecting device according to claim 1, wherein the transverse clamping device (11) is provided with a hinged rod (112) which is connected with the top beam plate (27) in a front-back rotating manner, the inner side of the hinged rod (112) is connected with an elastic wheel (111) through a shaft rod, the elastic wheel (111) is positioned between the two clamping wheels (104) in a top view direction, the right end of the hinged rod (112) is hinged with a sliding shaft (115), the sliding shaft (115) penetrates through a sliding plate (114) and a stabilizing block (116) in a sliding manner, the sliding plate (114) is connected with the top beam plate (27) in a sliding manner through a first sliding block (14) connected with the bottom end and a first sliding groove (13) formed in two sides of the top beam plate (27), the front end of the first sliding block (14) is provided with a positioning bolt (12), the stabilizing block (116) is fixed at the front end and the rear end of the top beam plate (27), and a second spring (113) is arranged between the hinged rod (112) and the sliding plate (114), the rear end of the sliding shaft (115) is provided with a limiting ring (117).