CN110106620B

CN110106620B - Novel automatic bottom plate lifting device

Info

Publication number: CN110106620B
Application number: CN201910486540.8A
Authority: CN
Inventors: 陈雪梅
Original assignee: Zhongshan Longzu Automation Technology Co ltd
Current assignee: Zhongshan Longzu Automation Technology Co ltd
Priority date: 2019-06-05
Filing date: 2019-06-05
Publication date: 2023-02-03
Anticipated expiration: 2039-06-05
Also published as: CN110106620A

Abstract

The invention discloses a novel automatic bottom plate lifting device, which solves the technical problems that the bottom plate lifting device in the existing computerized flat knitting machine is complex in structure, high in failure rate, and the like, and the bottom waste yarn needs to be manually dismounted; the key points of the technical scheme are as follows: comprises a threading plate, a lifting device and a steel wire drawing and feeding device. The lifting device is connected with the threading plate and used for pushing the threading plate to move up and down, the drawing and feeding steel wire device comprises a steel wire, a steel wire guide spring, a steel wire guide rail, a drawing and feeding motor and a synchronous belt which are used for driving the steel wire to penetrate into and draw out the threading plate, the full automation of the bottom lifting mode of the computerized flat knitting machine is improved, the failure rate of a bottom lifting plate is reduced, the normal drawing and feeding of the steel wire is ensured, the labor intensity of workers is reduced, the production efficiency is improved, waste yarns at the bottom lifting are saved, and the better use prospect is brought.

Description

Novel automatic bottom plate lifting device

Technical Field

The invention relates to the field of computerized flat knitting machines in textile manufacturing industry, in particular to a novel automatic bottom plate lifting device.

Background

When the prior hand-operated flat knitting machine starts knitting, the threading plate is inserted into gaps of front and back needle beds of the flat knitting machine from bottom to top, then a steel wire is manually penetrated through a needle ring at the top end of a needle tooth on the threading plate, the starting on the threading plate forms a closed state, the starting knitting of the flat knitting machine is realized, the starting mode does not need to consume starting yarns, and the requirement of yarn starting can be met. However, in the actual application process, the threading plate needs to be manually threaded with steel wires, a large amount of manpower is consumed, and the full-automatic bottom-lifting function cannot be realized.

Another utility model with the publication number of CN207958632U discloses a bottom lifting device structure. The bottom raising device mainly comprises a bottom raising comb, a sealing wire, a lifting mechanism and a wire feeding mechanism, wherein the sealing wire is controlled by the wire feeding mechanism to penetrate into the bottom raising comb. The lifting mechanism enables the bottom comb to move downwards to provide tension for the knitted piece, after the knitted piece is pulled to the cloth roller to normally draw the knitted piece, the wire feeding mechanism draws out the locking wire, and the computerized flat knitting machine normally knits the knitted piece. Therefore, the effect of no waste yarn starting like a hand flat knitting machine can be achieved, and the production cost is saved. The bottom lifting device matched with the computer flat knitting machine can save waste yarn and improve work efficiency, but the following technical problems are always exposed in the actual use process: one sealing wire adopts two wire feeding wheel surfaces to clamp the sealing wire so as to feed the sealing wire into the bottom lifting comb. However, the phenomenon that the lock wire and the wire feeding wheel are not delivered in place due to slipping frequently occurs in actual operation, so that a large amount of knitting needles of the flat knitting machine are damaged during bottom rising. The two wire feeding wheels can not be drawn out when the sealing lock wire is drawn out, and the three wire feeding wheels and the sealing lock wire are ground for a long time to cause the deformation and the grinding breakage of the sealing lock wire, so that the cloth can not be normally removed by the bottom lifting device. The four lifting devices adopt a double-motor lifting structure, so that the problem that the bottom comb is higher at one side and the other side when the bottom lifting device ascends and descends often occurs, the quality and the bottom lifting effect of a knitted piece are influenced, the production cost is high, and the installation difficulty is high. And the five lifting devices adopt a double-track motion design, the production cost and the installation difficulty are high, and the lower comb can hang the thread end of the weaving piece of the previous piece on the lower comb after the lower comb is reset to cause the lower comb to be difficult to lift next time.

Based on the technical problems, most of computerized flat knitting machine manufacturers are required to weave pieces by adopting a method without waste yarn rising, and the original method of hooking rubber bands or the original method of pulling waste yarns is adopted. To this end, we propose a new automatic floor raising device.

Disclosure of Invention

The invention mainly aims to provide a novel automatic bottom plate lifting device which can effectively solve the problems in the background technology.

In order to achieve the purpose, the invention adopts the technical scheme that:

novel automatic bottom plate device rises, including threading board, elevating gear and pumping steel wire device, elevating gear is close to top position department and is connected with the threading board for the drive threading board does ascending and descending motion. And a steel wire drawing and delivering device is arranged below the lifting device and used for driving a steel wire to penetrate into and draw out the threading plate. The steel wire drawing and feeding device comprises a steel wire, a steel wire drawing and feeding motor, a drawing and feeding motor seat for fixing the steel wire drawing and feeding motor, a belt fixing shaft and a fixing seat for supporting the belt fixing shaft, wherein a belt fixing wheel is installed on the belt fixing shaft, a large steel wire guide pipe is arranged at the tail end side of the steel wire drawing and feeding motor, the output shaft end of the steel wire drawing and feeding motor is connected with a synchronizing wheel, the synchronizing wheel and the belt fixing wheel are located on the same straight line, a synchronous belt is wound on the synchronizing wheel and the belt fixing wheel, a belt clamping block is fixedly connected to the upper end of the synchronous belt, the synchronizing wheel and the belt fixing wheel drive the synchronous belt to push and pull in a reciprocating mode in a positive and negative rotation mode, a steel wire guide rail is arranged below the steel wire drawing and feeding steel wire, a left limiting signal device and a right limiting signal device are arranged at the left end and the right end of the steel wire guide rail, and a steel wire guide spring is arranged on the inner surface and the outer surface of the region between the drawing and feeding motor seat and the belt clamping block.

Preferably, the drawing steel wire and the steel wire guide rail are both penetrated inside the steel wire guide spring, through the protection of the guide spring, the drawing steel wire is always kept in a linear state when the drawing steel wire is penetrated and threaded, the steel wire is ensured to penetrate the threading plate smoothly, the guide spring and the steel wire guide rail are simple in structure, the manufacturing cost and the installation difficulty of the wire feeding mechanism can be reduced, the steel wire is not easy to rub with other related accessories in the drawing process, and the failure rate of the bottom lifting device is effectively reduced.

Preferably, the threading board is including playing the mother board, the upper end that plays the mother board is provided with plays the end needle, just it has a steel wire that plays end to cross-under on the end needle, the small steel wire pipe has been cup jointed on the right side of playing the end steel wire, the left side that plays the mother board is provided with from upwards having set gradually steel wire to position signal pipe and steel wire reset signal device down, the steel wire signal pipe that targets in place simple structure volume less, occupation space is less, can ensure that steel wire reset signal device installs stably in less space. Can ensure through setting up the steel wire signalling device that targets in place that the steel wire can both accurately penetrate the assigned position when penetrating at every turn, avoid the steel wire to appear penetrating too much and wear the phenomenon emergence that does not target in place, the steel wire signalling device that targets in place can avoid lifting the end needle to warp the back steel wire and wear the off-normal position and actually not target in place, the problem that the device continued work and arouses more serious trouble takes place. The right side at the end of rising mother board is provided with steel wire reset signal pipe and steel wire reset signal device, steel wire reset signal device sets up on steel wire reset signal pipe, installs between little steel wire pipe and end of rising needle, ensures that the end of rising device gets back to steel wire reset signal device when taking off cloth and drawing silk at every turn, and the end of rising device just can continue work next step, prevents effectively that the steel wire fracture from stopping and not restoring to the throne completely in the end of rising needle and arouse the trouble.

Preferably, the extension end of the large steel wire guide pipe is sleeved on the small steel wire guide pipe of the bottom lifting needle plate, a small pipe is inserted into the large pipe when the large steel wire guide pipe and the small steel wire guide pipe are connected, the threading plate is in telescopic fit with the large pipe when ascending to the highest position or descending to the lowest position, and the telescopic fit of the large steel wire guide pipe and the small steel wire guide pipe can effectively ensure that the steel wire is always in the closed space of the steel wire guide pipe when the bottom lifting device ascends and descends, so that the steel wire is prevented from deforming and bending, and the steel wire is guided to smoothly feed and draw.

Preferably, the lifting device comprises a lifting motor, a screw shaft connected to the lifting motor and a screw shaft installed on the right side of the lifting device, synchronizing wheels are connected to the screw shafts on the left side and the right side, the synchronizing wheels are connected with synchronizing wheels of the lifting device on the other side through synchronizing belts, the lifting device on the two sides can be guaranteed to synchronously move up and down through the lifting structure when the lifting motor rotates, the threading plates connected to the lifting device can always synchronously move up and down, and the problem that the threading plates installed on the lifting device are high on one side and low on the other side is solved.

Preferably, a screw shaft sleeve and a buffer spring fixing seat are sleeved on the outer surface of the motor screw shaft, the screw shaft sleeve is sleeved with the shaft sleeve fixing seat and used for being connected with the linear track, a buffer spring fixing rod and a buffer spring are arranged between the buffer spring fixing seat and the screw shaft sleeve, the buffer spring can be arranged to prevent an upper fabric connected to the threading plate from being broken when the lifting motor draws downwards, the problems of yarn floating and yarn breaking when the motor torque is too large or too small and the actual coil of the braided fabric is not matched and is braided are avoided, and the connection buffering effect is achieved.

Preferably, the motor screw shaft is in threaded fit with the screw shaft sleeve, and the motor screw shaft drives the screw shaft sleeve and the connecting frame to move up and down when rotating.

Compared with the prior art, the novel automatic bottom plate lifting device is reasonable in structure and arrangement, strong in functionality and has the following beneficial effects: through mutually supporting of the drawing and feeding steel wire device, the lifting device and the threading plate that set up, utilize the reciprocating push-and-pull transmission structure of synchronizing wheel and hold-in range, improve the full automatization of the flat knitting machine mode of starting at the bottom, reduce the starting board fault rate, reduced staff's intensity of labour and saved the first yarn waste simultaneously, improve production efficiency, make equipment operation more steady, bring better use prospect.

Drawings

FIG. 1 is a schematic view of the overall composition of the present invention;

FIG. 2 is a schematic structural view of a steel wire drawing device according to the present invention;

FIG. 3 is a left side partial schematic view of FIG. 2 of the present invention;

FIG. 4 is a partial right side view of FIG. 2 of the present invention;

FIG. 5 is a schematic view of the structure of the threading board of the present invention;

FIG. 6 is a schematic view of the lifting device of the present invention;

in the figure: a, a threading plate; a-1 starting a mother board; a-2, a small steel wire conduit; a-3, starting a bottom needle; a-4, starting a bottom steel wire; a-5, resetting a signal conduit by a steel wire; a-6 steel wire in-place signal conduit; a-7 steel wire reset signal device and A-8 steel wire in-place signal device; C. a steel wire drawing device; c-1, a large steel wire conduit; c-2, a wire pumping and feeding motor base; c-3, a synchronous wheel; c-4, a wire drawing and feeding motor; c-5, a right limit signal device; c-6, a steel wire guide spring; c-7, drawing and conveying steel wires; c-8, synchronous belts; c-9, a belt clamping block; c-10, steel wire guide rails; c-11, a left limit signal device; c-12, a belt fixing shaft; c-13, belt fixing wheels; c-14, fixing seats; B. a lifting device; b-1, a threading plate fixing frame; b-2, fixing a frame connecting block; b-3, a linear track; b-4 linear bearings; b-5, fixing a lifting device; b-6 highest sensor; b-7 screw shaft; b-8, drawing a steel wire inductor; b-9 starting a bottom plate reset sensor; b-10 shaft sleeve fixing seats; b-11 buffer spring fixing rod; b-12 lead screw shaft sleeves; b-13 buffer spring; b-14 buffer spring fixing blocks; b-15 synchronizing wheel; b-16 lead screw fixing seats; b-17 bearings; b-18 plane bearing; b-19 screw rod fixing screws; b-20, lifting and mounting a left fixing plate; b-21 a lifting motor; b-22, fixing a shaft of the tension wheel; b-23 synchronous belt tensioning wheel; b-24 synchronous belt.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Novel automatic bottom plate device in this embodiment, as shown in fig. 1, including threading board A, first elevating gear B and drawing and sending steel wire device C, elevating gear B's top position department is provided with threading board A, and elevating gear B's below is provided with drawing and sending steel wire device C.

As shown in fig. 2, 3 and 4, the steel wire drawing and feeding device C comprises a steel wire drawing and feeding C-7, a steel wire drawing and feeding motor C-4 (not shown in the back drawing), a steel wire drawing and feeding motor base C-2 for fixing the steel wire drawing and feeding motor C-4, a belt fixing shaft C-12 and a fixing base C-14 for supporting the belt fixing shaft C-12, wherein the belt fixing shaft C-12 is provided with a belt fixing wheel C-13, the tail end side of the steel wire drawing and feeding C-7 is provided with a large steel wire guide pipe C-1, the output shaft end of the steel wire drawing and feeding motor C-4 is connected with a synchronizing wheel C-3, the synchronizing wheel C-3 and the belt fixing wheel C-13 are positioned on the same straight line, the synchronizing wheel C-3 and the belt fixing wheel C-13 are wound with a synchronizing belt C-8, a belt clamping block C-9 is fixedly sleeved at the upper end of the synchronous belt C-8, a steel wire guide rail C-10 is arranged below the pumping steel wire C-7, a left limit signal device C-11 and a right limit signal device C-5 are arranged at the left end and the right end of the steel wire guide rail C-10, a steel wire guide spring C-6 is arranged on the inner surface and the outer surface of the area between the pumping steel wire motor base C-2 and the belt clamping block C-9, the pumping steel wire C-7 is ensured to be pumped smoothly in the steel wire guide spring C-6, the pumping steel wire C-7 and the steel wire guide rail C-10 are both penetrated in the steel wire guide spring C-6, the pumping steel wire C-7 is ensured not to be deviated, an output shaft of a pumping wire motor C-4 rotates to drive the synchronous wheel C-3 to rotate, the synchronous pulley C-3 and the belt fixed pulley C-13 rotate positively and negatively to drive the synchronous belt C-8 to push and pull in a reciprocating manner, the belt clamping block C-9 fixed on the synchronous belt C-8 pushes the steel wire C-7 to move forward, and the steel wire guide spring C-6 contracts along with the steel wire.

As shown in figure 5, the threading plate A comprises a starting mother plate A-1, a starting bottom needle A-3 is arranged at the upper end of the starting mother plate A-1, a starting bottom steel wire A-4 penetrates through the starting bottom needle A-3, a small steel wire guide pipe A-2 is sleeved on the right side of the starting bottom steel wire A-4, a steel wire in-place signal guide pipe A-6 and a steel wire in-place signal device A-8 are sequentially arranged on the left side of the starting mother plate A-1 from bottom to top, a steel wire reset signal guide pipe A-5 is arranged on the right side of the starting mother plate A-1, a steel wire reset signal device A-7, a steel wire in-place signal guide pipe A-6 and a steel wire in-place signal device A-8 are all arranged on a track line of the starting bottom steel wire A-4, and a steel wire reset signal guide pipe A-5 is arranged below the steel wire reset signal device A-7.

As shown in fig. 6, the lifting device B comprises a lifting motor B-21 and a lifting device fixing plate B-20 fixed on the frame of the flat knitting machine, a motor screw shaft and a synchronizing wheel are connected to an output shaft of the lifting motor B-21, the synchronizing wheel is connected to a synchronizing wheel B-15 on the other side through a synchronizing belt B-24, the synchronizing wheel B-15 is fixed on the screw shaft B-7, a screw shaft sleeve B-12 and a buffer spring B-13 are sleeved on the outer surface of the motor screw shaft B-7 near the bottom end, and a buffer spring fixing seat B-14 for fixing the buffer spring B-13, a spring fixing rod B-11 is arranged between the buffer spring fixing seat B-14 and the screw shaft sleeve B-13, a shaft sleeve fixing seat B-10 is sleeved on the upper side of the screw shaft sleeve B-12 of the motor screw shaft B-7, an output shaft of the lifting motor B-21 transmits torque to the motor screw shaft, the screw shaft B-7 is driven to rotate by the synchronizing wheel B-15, rotary motion is converted into linear motion by matching with threads of the screw shaft sleeve B-12, the shaft sleeve B-10 drives the shaft sleeve B-10, when the lifting device is lifted by the lifting device, the buffer spring fixing plate B-14 and the buffer spring fixing plate B-13, and the buffer spring fixing plate B-14 are arranged between the lifting device.

As shown in fig. 6, the lifting device B comprises a lifting device fixing plate B-20, a threading plate fixing frame B-1, a fixed connecting block B-2, a linear bearing B-4, a highest position sensor B-6, a steel wire drawing sensor B-8, a bottom plate lifting reset sensor B-9 and the like, and the principle of the invention is as follows: in the novel automatic bottom plate lifting device in the embodiment, when the machine starts to operate, the machine head can drive the yarn nozzle to lift and weave according to patterns, after the head lifting action is finished, the electric control system can control the lifting motor B-21 to rotate clockwise, the synchronous wheel and the synchronous belt B-24 simultaneously, the screw shaft B-7 rotates clockwise, the screw shaft sleeve B-12 in threaded fit can push the shaft sleeve fixing seat B-10 to move upwards along with the rotation of the motor screw shaft B-7, the linear guide rail B-3, the fixed connecting block B-2, the threading plate fixing block B-1 and the threading plate A which are connected with the screw shaft sleeve B-12 simultaneously ascend, when the threading plate A ascends to the highest position sensor B-6, the electric control system controls the drawing and feeding motor C-4 to drive the synchronous wheel C-3 synchronous belt C-8 belt fixing wheel C-13 to rotate, a belt clamping block C-9 fixed on a synchronous belt C-8 pushes a steel wire C-7 to move before the steel wire C-7 moves, a steel wire guide spring C-6 contracts along with the steel wire, the steel wire can pass through a steel wire guide pipe C-1, a small steel wire guide pipe A-2 and a bottom lifting needle A-3 to reach a steel wire in-place signal device A-7, a drawing steel wire C-7 and a bottom lifting steel wire A-4 are the same steel wire, a wire drawing and feeding motor C-4 stops drawing and feeding the steel wire after detecting an in-place signal, an electric control system controls a lifting motor G-7 to rotate anticlockwise, a threading plate A, a lifting device B which are connected are pulled downwards, meanwhile, a machine knitted fabric is pulled down, when the lifting device B descends to a steel wire drawing inductor B-8, a bottom lifting roller clamps the fabric, the drawing and feeding motor C-4 rotates in the opposite direction to draw the steel wire C-7 to a steel wire reset signal device A 7, the steel wire drawing and feeding device C finishes the action, the extending end of the large steel wire guide pipe C-1 is sleeved on the small steel wire guide pipe A-2 of the bottom lifting needle plate A, the large steel wire guide pipe C-1 and the small steel wire guide pipe A-2 are connected in a mode that a small pipe is inserted into the large pipe, the threading plate A rises to the highest position or falls to the lowest position, the large pipe is in telescopic fit, the threading plate A falls to the position of the reset inductor B-9, meanwhile, the small steel wire guide pipe completely extends into the steel wire guide pipe C-1, and the whole bottom lifting device finishes the work.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, and such changes and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. Automatic play bottom plate device, including threading board (A), elevating gear (B) and pump steel wire device (C), the both ends of elevating gear (B) are connected with threading board (A) for promote threading board (A) elevating movement, its characterized in that: the lifting device (B) comprises a threading plate fixing frame (B-1), a fixing frame connecting block (B-2), a linear track (B-3), a linear bearing (B-4), a lifting device fixing plate right side (B-5), a highest position sensor (B-6), a screw rod shaft (B-7), a steel-drawing wire position sensor (B-8), a bottom plate lifting reset sensor (B-9), a shaft sleeve fixing seat (B-10), a buffer spring fixing rod (B-11), a screw rod shaft sleeve (B-12), a buffer spring (B-13), a buffer spring fixing seat (B-14), a first synchronous wheel (B-15), a screw rod fixing seat (B-16), a screw rod fixing bearing (B-17), a plane bearing (B-18), a screw rod fixing screw (B-19), a lifting device fixing plate left side (B-20), a lifting motor (B-21), a fixing shaft (B-22), a synchronous belt (B-23), a first synchronous belt (B-24), a synchronous belt fixing seat (B-25), a lifting motor (B-21), an output shaft of the lifting motor (B-21) is connected with the buffer spring fixing seat (B-14) and the buffer spring fixing seat (B-14), a second synchronous wheel (C-3) is connected on the lifting motor (B-21), the second synchronous wheel (C-3) is connected with a second synchronous wheel (C-3) of the lifting device (B) at the other side through a second synchronous belt (C-8), a drawing and feeding steel wire device (C) is arranged below the lifting device (B) and is used for driving a drawing and feeding steel wire (C-7) to penetrate into and draw out the threading plate (A), the drawing and feeding steel wire device (C) comprises a drawing and feeding steel wire (C-7), a steel wire guide spring (C-6), a steel wire guide rail (C-10), a drawing and feeding wire motor (C-4) and a drawing and feeding wire motor seat (C-2) for fixing the drawing and feeding steel wire motor (C-4), a belt fixing shaft (C-12) and a fixing seat (C-14) for supporting the belt fixing shaft (C-12), a belt fixing wheel (C-13) is arranged on the belt fixing shaft (C-12), a large steel wire guide pipe (C-1) is arranged at the tail end side of the drawing and feeding steel wire (C-7), the second synchronous wheel (C-3) and the straight wire feeding motor (C-13) are connected with the same output wheel (C-3), the second synchronous wheel (C-3) and the belt fixing wheel (C-13) are connected with a second synchronous belt (C-8) in a winding mode, a belt clamping block (C-9) is fixedly connected to the upper end of the second synchronous belt (C-8) in a fixing mode, the second synchronous wheel (C-3) and the belt fixing wheel (C-13) rotate in the positive and negative direction to drive the second synchronous belt (C-8) to perform reciprocating push-pull transmission, a steel wire guide rail (C-10) is arranged below the pumping steel wire (C-7), a left limiting signal device (C-11) and a right limiting signal device (C-5) are arranged at the left end and the right end of the steel wire guide rail (C-10), and a steel wire guide spring (C-6) is arranged on the inner surface and the outer surface of the region between the pumping steel wire motor base (C-2) and the belt clamping block (C-9) through which the pumping steel wire (C-7) penetrates.

2. The automatic floor raising apparatus according to claim 1, wherein: the drawing steel wire (C-7) and the steel wire guide rail (C-10) are both penetrated in the steel wire guide spring (C-6), so that the pushing straightness of the steel wire is ensured, and the drawing stability of the steel wire is also ensured.

3. The automatic floor raising apparatus according to claim 1, wherein: the wire threading plate (A) comprises a bottom raising mother plate (A-1), a bottom raising needle (A-3) is arranged at the upper end of the bottom raising mother plate (A-1), a bottom raising steel wire (A-4) penetrates through the bottom raising needle (A-3), a small steel wire guide pipe (A-2) is sleeved on the right side of the bottom raising steel wire (A-4), a steel wire in-place signal guide pipe (A-6) and a steel wire in-place signal device (A-8) are sequentially arranged on the left side of the bottom raising mother plate (A-1) from bottom to top, a steel wire reset signal device (A-7) is arranged on the right side of the bottom raising mother plate (A-1), the steel wire reset signal device (A-7), the steel wire in-place signal guide pipe (A-6) and the steel wire in-place signal device (A-8) are all arranged on a track line of the bottom raising steel wire (A-4), and a steel wire reset signal guide pipe (A-5) is arranged below the steel wire reset signal device (A-7).

4. The automatic floor raising apparatus according to claim 3, wherein: the extension end of the large steel wire guide pipe (C-1) is sleeved on the small steel wire guide pipe (A-2) of the bottom lifting needle plate (A), when the large steel wire guide pipe (C-1) is connected with the small steel wire guide pipe (A-2), a small pipe is inserted into the large pipe, and the large pipe is in telescopic fit with the large pipe when the threading plate (A) rises to the highest position or descends to the lowest position.

5. The automatic floor raising apparatus according to claim 1, wherein: the lifting device (B) comprises a lifting motor (B-21), a screw rod shaft (B-7) connected to the lifting motor (B-21) and the screw rod shaft (B-7) installed on the other side of the lifting motor (B-21), a screw rod shaft sleeve (B-12) and a buffer spring fixing seat (B-14) are sleeved on the outer surface of the screw rod shaft (B-7), a shaft sleeve fixing seat (B-10) is sleeved above the screw rod shaft sleeve (B-12) on the screw rod shaft (B-7) and connected with a linear track (B-3), and a buffer spring fixing rod (B-11) and a buffer spring (B-13) are arranged between the buffer spring fixing seat (B-14) and the screw rod shaft sleeve (B-12).

6. The automatic floor raising apparatus according to claim 1, wherein: the screw rod shaft (B-7) is provided with a synchronizing wheel, the synchronizing wheel is connected with a lifting device synchronizing wheel at the other side of the synchronizing belt through a synchronizing belt, and the screw rod shaft (B-7) arranged at two sides moves up and down along with the screw rod shaft sleeve (B-12) and the linear track when the lifting motor rotates, so that the two sides of the lifting plate are balanced up and down.