CN220783787U - Pulling aid - Google Patents

Abstract

The utility model belongs to the technical field of servers, and discloses a pulling-assisting device which comprises a handle, pulling-assisting blocks and a driving assembly, wherein the pulling-assisting blocks are arranged at two opposite ends of the handle in pairs, each pulling-assisting block can be arranged at the corresponding end of the handle in a swinging manner, the driving assembly comprises a driving rotating shaft and pulling cables, the driving rotating shaft is rotatably arranged on the handle, the pulling cables and the pulling-assisting blocks are arranged in one-to-one correspondence, the first ends of the pulling cables are connected with the driving rotating shaft, and the second ends of the pulling cables are connected with the corresponding pulling-assisting blocks. The pull-assisting device provided by the utility model has a simple structure, the first ends of the two pulling cables can be wound on the side surface of the driving rotating shaft by rotating the driving rotating shaft, so that the two pulling cables respectively pull the two pull-assisting blocks to swing outwards relative to the handle, excessive force arms are not needed to be applied, the space occupation is small, the operation is convenient and labor-saving, and the force application is more uniform and stable.

Description

Pulling aid

Technical Field

The utility model relates to the technical field of servers, in particular to a pull-out aid.

Background

A pull aid is a device that assists a user in securing one article to another or in separating another article. In the server field, help pull out ware also can be used for the occasion of server blade plug, and the user can promote the operation convenience under helping pull out ware's assistance, and is effective laborsaving, facilitate the use.

At present, the auxiliary pulling device is usually operated by adopting a cylinder rod principle, and the structure of the auxiliary pulling device mainly comprises a handle and two symmetrically arranged auxiliary pulling blocks, and an operator applies force to the auxiliary pulling blocks at two ends at the same time when using the auxiliary pulling device, so that the plug-in and pull-out work can be completed. In the prior art, the pull-up aid applied to the insertion and the pull-out of the server blade still has some defects: on the one hand, the existing extractor requires a sufficiently long force arm to achieve the obvious effort-saving effect. The application of the moment arm requires a certain space, the space on the server is limited, and enough space can not be provided for applying a longer moment arm generally; on the other hand, in the process of manual force application of an operator, uneven force control is possibly caused by subjective operation, so that the pulling-assisting blocks on two sides of the handle cannot achieve the same rotation angle, the situation that the blade is inserted askew can occur when the blade is inserted, uneven stress on the blade can be caused when the blade is pulled out, and damage to the blade can be caused when the blade is serious.

Disclosure of utility model

The utility model aims to provide a pulling-assisting device which is simple in structure, small in occupied space and more uniform and stable in force application.

To achieve the purpose, the utility model adopts the following technical scheme:

A pull aid comprising:

A handle;

The pulling-assisting blocks are arranged at two opposite ends of the handle in pairs, and each pulling-assisting block can be arranged at the corresponding end of the handle in a swinging manner;

The driving assembly comprises a driving rotating shaft and a traction cable; wherein,

The driving rotating shaft is rotatably arranged on the handle, the traction cables are arranged in one-to-one correspondence with the pulling-assisting blocks, the first ends of the traction cables are connected with the driving rotating shaft, and the second ends of the traction cables are connected with the corresponding pulling-assisting blocks;

The first ends of the two traction ropes can be wound on the side face of the driving rotating shaft through rotation of the driving rotating shaft, so that the two traction ropes respectively draw the two pulling-assisting blocks to swing outwards relative to the handle.

Preferably, each pulling-assisting block is provided with a positioning piece, and two opposite ends of the handle are correspondingly provided with positioning grooves;

The locating piece comprises a locating sleeve and a locating pin, the locating sleeve is fixed on the pulling-assisting block, the locating pin is arranged on the locating sleeve in a telescopic mode, and the locating pin is suitable for extending out of the locating sleeve and extending into the corresponding locating groove when the pulling-assisting block swings outwards to a proper position relative to the handle.

Preferably, the positioning member further comprises a first elastic member disposed between the positioning pin and the positioning sleeve, the first elastic member being adapted to provide a force forcing the positioning pin to extend outwardly relative to the positioning sleeve.

Preferably, an unlocking assembly is arranged on the handle, and comprises an unlocking driving piece and an unlocking drill wire;

each positioning groove is internally provided with an unlocking drill wire, and the unlocking driving piece can drive the unlocking drill wire in each positioning groove to move, so that the unlocking drill wire can be pushed outwards to extend into the positioning pin in each positioning groove.

Preferably, the unlocking driving piece comprises unlocking blocks, telescopic grooves are formed in the handle, the telescopic grooves are formed in the position between two positioning grooves and are communicated with the two positioning grooves, the unlocking blocks are arranged in the telescopic grooves in a telescopic mode, pushing inclined planes are formed in the two sides of the unlocking blocks, corresponding to the positioning grooves, of the unlocking blocks, the pushing inclined planes are arranged in the direction of the opening of the telescopic grooves in an inward inclined mode through the side surfaces of the unlocking blocks, and one end, away from the pulling assisting blocks, of each unlocking drill wire is penetrated through the positioning grooves and the corresponding end of each unlocking drill wire is abutted to the pushing inclined planes.

Preferably, the unlocking driving member further comprises a second elastic member, wherein the second elastic member is arranged between the unlocking block and the telescopic slot, and the second elastic member is suitable for providing a force for forcing the unlocking block to extend outwards relative to the telescopic slot.

Preferably, the handle has an inner cavity, and the drive shaft and the first end of the traction cable are both located in the inner cavity.

Preferably, a screwing groove for plugging an external screwing driving piece is formed in the end face of the driving rotating shaft.

Preferably, the driving assembly further comprises a driving motor, the fixed end of the driving motor is fixedly connected with the handle, and the output shaft of the driving motor is fixedly connected with the driving rotating shaft.

Preferably, the handle is fixedly arranged on the cutter shell, the cutter shell is provided with stop blocks corresponding to the pulling-assisting blocks one by one, and the pulling-assisting blocks are suitable for being abutted with the corresponding stop blocks when being swung out of position relative to the handle.

The beneficial effects are that:

According to the pulling assisting device, when the two pulling assisting blocks need to be controlled to swing outwards relative to the handles, the driving rotating shaft is controlled to rotate, so that the first ends of the two pulling cables are wound on the side face of the driving rotating shaft, and the two pulling cables respectively pull the two pulling assisting blocks to swing outwards relative to the handles in the rotating process of the driving rotating shaft, so that the outward swinging operation of the two handles is realized. The device does not need excessive force arm application space, occupies small space, is convenient and labor-saving to operate, has more uniform and stable force application, and is suitable for a blade server with compact space. And in the rotation process of the driving rotating shaft, the two pulling-assisting blocks simultaneously swing outwards relative to the handle at the same angular speed, so that the two pulling-assisting blocks can be forced in a balanced manner, the parallel opposite insertion of the blade is ensured, the situation that the blade is inclined during the insertion is effectively avoided, and the blade can be better protected.

Drawings

FIG. 1 is a schematic view of the structure of the extractor aid provided by the utility model;

FIG. 2 is an exploded view of the extractor aid of the present utility model;

FIG. 3 is a cross-sectional view of a portion of the structure of the extractor aid provided by the present utility model in one state;

FIG. 4 is an enlarged schematic view of a portion of the present utility model at A in FIG. 3;

FIG. 5 is a cross-sectional view of a portion of the extractor aid structure provided by the present utility model in another state;

FIG. 6 is an enlarged schematic view of a portion of the present utility model at B in FIG. 5;

fig. 7 is a partial schematic view of another portion of the extractor aid provided by the present utility model.

In the figure:

1. a handle; 11. a positioning groove; 12. a telescopic slot; 13. an inner cavity; 131. an inner cavity cover; 132. a through hole;

2. pulling-assisting blocks; 21. a positioning piece; 211. a positioning sleeve; 212. a positioning pin; 213. a first elastic member;

3. A drive assembly; 31. driving the rotating shaft; 311. a screwing groove; 32. pulling a cable;

4. Unlocking the assembly; 41. unlocking the block; 411. pushing against the inclined plane; 42. unlocking the drill wire; 43. a second elastic member;

5. A cutter shell; 51. and a stop block.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

The embodiment provides a pull-out aid. Referring to fig. 1 to 6, the pull-out aid comprises a handle 1, a pull-out aid block 2 and a drive assembly 3; the pulling-assisting blocks 2 are arranged at two opposite ends of the handle 1 in pairs, and each pulling-assisting block 2 can be arranged at the corresponding end of the handle 1 in a swinging way; the driving assembly 3 comprises a driving rotating shaft 31 and traction cables 32, wherein the driving rotating shaft 31 is rotatably arranged on the handle 1, the traction cables 32 are arranged in one-to-one correspondence with the pulling-assisting blocks 2, the first ends of the traction cables 32 are connected with the driving rotating shaft 31, and the second ends of the traction cables 32 are connected with the corresponding pulling-assisting blocks 2; the rotation of the driving shaft 31 can enable the first ends of the two pulling cables 32 to be wound on the side surface of the driving shaft 31, so that the two pulling cables 32 respectively pull the two pulling-assisting blocks 2 to swing outwards relative to the handle 1.

In this embodiment, when the two pulling-assisting blocks 2 need to be controlled to swing outwards relative to the handle 1, the driving shaft 31 is controlled to rotate, so that the first ends of the two pulling cables 32 are wound on the side surface of the driving shaft 32, and the two pulling cables 32 respectively pull the two pulling-assisting blocks 2 to swing outwards relative to the handle 1 in the rotation process of the driving shaft 31 (in the directions indicated by two arrows in fig. 3), thereby realizing the swinging-outwards operation of the two handles 1. The device does not need excessive force arm application space, occupies small space, is convenient and labor-saving to operate, has more uniform and stable force application, and is suitable for a blade server with compact space. And in the rotation process of the driving rotating shaft 31, the two pulling-assisting blocks 31 swing outwards relative to the handle 1 at the same angular speed, so that the two pulling-assisting blocks 2 can be forced in a balanced manner, the parallel opposite insertion of the blade is ensured, the situation that the blade is inclined during the insertion is effectively avoided, and the blade can be better protected.

Specifically, in the process that the two pulling-assisting blocks 2 swing outwards relative to the handle, the end part of each pulling-assisting block 2 can push the corresponding side of the server blade to enable the blade to move towards the inside of the cabinet, and when the two pulling-assisting blocks 2 swing outwards relative to the handle 1 in place, the blade is successfully pushed into the cabinet.

In the present embodiment, the traction cable 32 is provided as a flexible cable.

In this embodiment, a third elastic member (not shown) is further disposed between the driving shaft 31 and the handle 1, and the third elastic member is adapted to provide a force for forcing the driving shaft 31 to rotate and reset, specifically, after the driving shaft 31 rotates a certain angle relative to the handle 1, the force applied to the driving shaft 31 is removed, and under the action of the third elastic member, the driving shaft 31 can be reversely rotated and reset. The third elastic piece is provided as a torsion spring, one end of which is connected with the handle 1, and the other end of which is connected with the driving rotating shaft 31.

As an alternative embodiment, the side surface of the driving shaft 31 is provided with a winding groove along the axial direction, so that the first end of the traction cable 32 can be reliably wound when the driving shaft 31 rotates.

In this embodiment, the handle 1 is fixedly arranged on the cutter housing 5, and the cutter housing 5 is provided with stop blocks 51 corresponding to the pulling-assisting blocks 2 one by one, and the pulling-assisting blocks 2 are suitable for abutting against the corresponding stop blocks 51 when the handle 1 is swung out to place. Specifically, by providing the stop block 51, the pull-assisting block 2 can be abutted against the pull-assisting block 2 after the pull-assisting block 2 swings out to a certain position relative to the handle 1, so that the pull-assisting block 2 is limited to continue rotating, and excessive outward swinging of the pull-assisting block 2 is avoided.

As an alternative embodiment, the handle 1 and the cutter housing 5 are fixed by a bolt assembly.

In this embodiment, the handle has an inner cavity 13, and the driving shaft 31 and the first end of the pulling cable 32 are both located in the inner cavity 13. Specifically, the inner cavity 13 is provided to penetrate the handle 1. One end of each traction cable 32 far away from the driving rotating shaft 31 extends out of the inner cavity 13 and is connected with the pulling-out assisting block 2 at the corresponding end. By arranging the inner cavity 13 on the handle 1, the important driving components such as the driving rotating shaft 31 and the traction cable 32 are arranged in the inner cavity 13, the space is reasonably configured, and the important driving components such as the driving rotating shaft 31 and the traction cable 32 can be reliably protected and are prevented from being exposed to the external environment.

Specifically, the handle 1 is provided with an opening communicating with the inner cavity 13, and the opening is detachably covered with an inner cavity cover 131. When it is necessary to inspect the drive assembly 3 inside the handle 1, the inner chamber cover 131 may be opened, and inspection and maintenance of the drive assembly 3 inside the inner chamber 13 may be performed through the opening.

More specifically, one side end surface of the driving shaft 31 protrudes from the inner cavity 13, and a screwing groove 311 for plugging an external screwing driving member is provided on the side end surface. The external screwing driving piece can be a tool such as an electric drill bit, a screwdriver and the like, and the shape of the screwing groove 311 is matched with the shape of the electric drill bit and the screwdriver bit. In the present embodiment, the inner cavity cover 131 is provided with a through hole 132, and the end surface of the driving shaft 31 on one side provided with the screwing groove 311 is disposed corresponding to the through hole 132.

As an alternative embodiment, the driving assembly 3 further comprises a driving motor (not shown), a fixed end of which is fixedly connected to the handle 1, and an output shaft of which is fixedly connected to the driving rotation shaft 31. Under the above structural characteristics, the driving motor can be directly connected with the driving shaft 31 to drive the driving shaft 31 to rotate. The driving rotating shaft 31 and the output shaft of the driving motor can be connected through a coupling, or can be directly fixedly sleeved on the output shaft of the driving motor for connection.

In this embodiment, each pulling-assisting block 2 is provided with a positioning piece 21, and two opposite ends of the handle 1 are provided with positioning grooves 11 correspondingly; the positioning piece 21 comprises a positioning sleeve 211 and a positioning pin 212, the positioning sleeve 211 is fixed on the pulling-assisting block 2, the positioning pin 212 is telescopically arranged on the positioning sleeve 211, and the positioning pin 212 is suitable for extending out of the positioning sleeve 211 and extending into the corresponding positioning groove 11 when the pulling-assisting block 2 swings outwards relative to the handle 1 to be in place. In this embodiment, when the pull-assisting block 2 swings out of the handle 1, the positioning piece 21 can correspond to the positioning groove 11, and the positioning pin 212 can extend out of the positioning sleeve 211 and extend into the positioning groove 11, so as to limit the pull-assisting block 2, and keep the pull-assisting block 2 in a swung out position relative to the handle 1.

Further, the positioning member 21 further comprises a first elastic member 213, wherein the first elastic member 213 is disposed between the positioning pin 212 and the positioning sleeve 211, and the first elastic member 213 is adapted to provide a force forcing the positioning pin 212 to extend outwards relative to the positioning sleeve 211. Specifically, by arranging the first elastic piece 213, when the pull-assisting block 2 swings out to the right relative to the handle 1, the positioning pin 212 is aligned to the positioning groove 11, and the first elastic piece 213 can drive the positioning pin 212 to extend outwards relative to the positioning sleeve 211, so that the positioning pin 212 can extend into the positioning groove 11 to swing and limit the pull-assisting block 2.

In this embodiment, the first elastic member 213 is configured as a spring, the spring is disposed in the positioning sleeve 211, one end of the spring is connected to the positioning sleeve 211, and the other end is connected to the positioning pin 212.

In this embodiment, referring to fig. 5 to 7, an unlocking assembly 4 is provided on the handle 1, the unlocking assembly 4 includes an unlocking driving member and an unlocking wire 42, each positioning slot 11 is provided with the unlocking wire 42, the unlocking driving member can drive the unlocking wire 42 in the positioning slot 11 to move, so that the unlocking wire 42 can push outwards against the positioning pin 212 extending into the positioning slot 11. Specifically, when the pulling-assisting block 2 needs to be unlocked, the plugging relation between the positioning pin 212 and the positioning groove 11 needs to be released, by arranging the unlocking brazing wire 42 and the unlocking driving piece, the unlocking brazing wire 42 can move in the positioning groove 11 under the action of the unlocking driving piece, so that one side of the unlocking brazing wire 42, facing the positioning pin 212, can push against the positioning pin 212 to retract relative to the positioning sleeve 211, and when the positioning pin 212 is completely pushed out of the positioning groove 11, the pulling-assisting block 2 is unlocked at the moment and can swing inwards relative to the handle 1 and reset.

Further specifically, the unlocking driving piece comprises an unlocking block 41, the handle 1 is provided with a telescopic groove 12, the telescopic groove 12 is arranged between the two positioning grooves 11 and is communicated with the two positioning grooves 11, the unlocking block 41 is arranged in the telescopic groove 12 in a telescopic manner, both sides of the unlocking block 41 corresponding to the positioning grooves 11 are respectively provided with a pushing inclined surface 411, the pushing inclined surfaces 411 are arranged in an inward inclined manner along the opening direction of the telescopic groove 12 by the side surfaces of the unlocking block 41, and one end of each unlocking drill wire 42, far away from the pulling-assisting block 2, is respectively penetrated with the positioning groove 11 and is abutted against the pushing inclined surface 411 at the corresponding end.

Specifically, referring to fig. 7, pressure is applied to the unlocking block 41 along the vertical arrow direction in the drawing, and the vertical arrow direction in the drawing is also the opening direction of the telescopic slot 12, and faces the bottom of the telescopic slot 12, so that the unlocking block 41 can move inwards towards the bottom of the telescopic slot 12, in the process, the pushing inclined planes 411 on two sides of the telescopic slot 12 can contact with the unlocking braze wires 42 on the corresponding sides, in the process of moving the unlocking block 41 inwards, the unlocking braze wires 42 can move towards the horizontal arrow direction in the drawing, namely, the unlocking braze wires 42 move towards one side of the positioning pin 212, and the unlocking braze wires 42 can push against the positioning pin 212 to retract relative to the positioning sleeve 211 towards one side of the positioning pin 212 until the positioning pin 212 is completely pushed out of the positioning slot 11.

Further, the unlocking driving member further comprises a second elastic member 43, wherein the second elastic member 43 is arranged between the unlocking block 41 and the telescopic slot 12, and the second elastic member 43 is adapted to provide a force forcing the unlocking block 41 to extend outwards relative to the telescopic slot 12. Specifically, when the pressure applied to the unlocking block 41 is released, the unlocking block 41 can be driven to move in the direction extending outward from the expansion groove 12 and reset by the second elastic member 43.

Optionally, the second elastic member 43 is provided as a spring, one end of which is connected to the unlocking block 41 and the other end of which is connected to the inner cavity 13 of the handle.

It should be noted that, after the unlocking block 41 extends out of the telescopic slot 12 and is reset, even if the unlocking wire 42 does not move continuously, when the positioning pin 212 extends into the positioning slot 11 next time, the unlocking wire 42 can be pushed to a position contacting the pushing inclined plane 411 again, so as to ensure that the next unlocking operation can be performed smoothly.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. A pull-out aid, comprising:

A handle (1);

The pulling-assisting blocks (2) are arranged at two opposite ends of the handle (1) in pairs, and each pulling-assisting block (2) can be arranged at the corresponding end of the handle (1) in a swinging way;

the driving assembly (3) comprises a driving rotating shaft (31) and a traction cable (32); wherein,

The driving rotating shaft (31) is rotatably arranged on the handle (1), the traction ropes (32) are arranged in one-to-one correspondence with the pulling-assisting blocks (2), the first ends of the traction ropes (32) are connected with the driving rotating shaft (31), and the second ends of the traction ropes (32) are connected with the corresponding pulling-assisting blocks (2);

The rotation of the driving rotating shaft (31) can enable the first ends of the two traction ropes (32) to be wound on the side face of the driving rotating shaft (31), so that the two traction ropes (32) respectively draw the two pulling-assisting blocks (2) to swing outwards relative to the handle (1).

2. The pull-out aid according to claim 1, wherein each pull-out aid block (2) is provided with a positioning piece (21), and two opposite ends of the handle (1) are provided with positioning grooves (11) correspondingly;

The locating piece (21) comprises a locating sleeve (211) and a locating pin (212), the locating sleeve (211) is fixed on the pulling-assisting block (2), the locating pin (212) is arranged on the locating sleeve (211) in a telescopic mode, and the locating pin (212) is suitable for extending out of the locating sleeve (211) and extending into the corresponding locating groove (11) when the pulling-assisting block (2) swings outwards to a proper position relative to the handle (1).

3. The extractor aid according to claim 2, wherein the positioning element (21) further comprises a first elastic element (213), the first elastic element (213) being arranged between the positioning pin (212) and the positioning sleeve (211), the first elastic element (213) being adapted to provide a force forcing the positioning pin (212) to extend outwards with respect to the positioning sleeve (211).

4. The extractor aid according to claim 2, characterized in that an unlocking assembly (4) is provided on the handle (1), the unlocking assembly (4) comprising an unlocking drive and an unlocking drill wire (42);

Each positioning groove (11) is internally provided with an unlocking brazing wire (42), and the unlocking driving piece can drive the unlocking brazing wire (42) in each positioning groove (11) to move, so that the unlocking brazing wire (42) can be pushed outwards to extend into the positioning pin (212) in each positioning groove (11).

5. The extractor aid according to claim 4, wherein the unlocking driving piece comprises an unlocking piece (41), a telescopic groove (12) is formed in the handle (1), the telescopic groove (12) is formed between the two positioning grooves (11) and is communicated with the two positioning grooves (11), the unlocking piece (41) is arranged in the telescopic groove (12) in a telescopic manner, pushing inclined planes (411) are formed in two sides of the unlocking piece (41) corresponding to the positioning grooves (11), the pushing inclined planes (411) are arranged in the opening direction of the telescopic groove (12) in an inward inclined manner through the side surfaces of the unlocking piece (41), and one end, away from the extracting aid piece (2), of each unlocking wire (42) is penetrated through the positioning groove (11) to be abutted against the pushing inclined planes (411) of the corresponding ends.

6. The extractor aid according to claim 5, wherein the unlocking drive further comprises a second elastic member (43), the second elastic member (43) being arranged between the unlocking block (41) and the telescopic slot (12), the second elastic member (43) being adapted to provide a force forcing the unlocking block (41) to extend outwards with respect to the telescopic slot (12).

7. The extractor aid according to claim 1, characterized in that the handle (1) has an inner cavity (13), the drive shaft (31) and the first end of the traction cable (32) being both located in the inner cavity (13).

8. The extractor aid according to claim 1, characterized in that the end face of the drive shaft (31) is provided with a screwing groove (311) for the insertion of an external screwing driving piece.

9. The extractor aid according to claim 1, characterized in that the drive assembly (3) further comprises a drive motor, the fixed end of which is fixedly connected with the handle (1), and the output shaft of which is fixedly connected with the drive shaft (31).

10. The pull-out aid according to claim 1, wherein the handle (1) is fixedly arranged on a cutter shell (5), stop blocks (51) corresponding to the pull-out aid blocks (2) one by one are arranged on the cutter shell (5), and the pull-out aid blocks (2) are suitable for abutting against the corresponding stop blocks (51) when the pull-out aid blocks (2) swing out relative to the handle (1) to the right place.