CN215148294U

CN215148294U - Filter clamping tool

Info

Publication number: CN215148294U
Application number: CN202120022123.0U
Authority: CN
Inventors: 刘芳; 王斌; 汪甜
Original assignee: Sany Heavy Machinery Ltd
Current assignee: Sany Heavy Machinery Ltd
Priority date: 2021-01-06
Filing date: 2021-01-06
Publication date: 2021-12-14
Anticipated expiration: 2031-01-06

Abstract

The utility model provides a filter clamping tools, including base, two at least activity clamp splices and actuating mechanism, the base is for having open-top's tubular structure, the activity clamp splice is installed the top of base, so that activity clamp splice centre gripping filter. The utility model provides a brand-new filter clamping tool, its simple structure is compact, adopts the tubular structure base to reduce occupation space, and the required operating space of dismouting filter is little, carries out the centre gripping to the filter through the activity clamp splice, and the radial movement of base can be followed to each activity clamp splice, has realized the flexible adjustment of centre gripping diameter, is applicable to the filter of different specifications, and the commonality is strong.

Description

Filter clamping tool

Technical Field

The utility model relates to a mechanical tool technical field particularly, relates to a filter clamping tool.

Background

The filter is a filter fitting of an engine and is used for filtering debris and impurities generated in the working process of the engine, keeping the engine oil clean and prolonging the service life of the engine. The filter must be replaced after a certain time of use, and a special tool is generally used for disassembling the filter.

In the prior art, the disassembling tool of the filter includes a belt wrench, a jaw wrench, a steel belt wrench, a three-jaw wrench, etc. However, these removal tools have limitations, such as requiring a large operation space when in use, having an unadjustable clamping diameter, having a small application range, being not firmly engaged with the filter, often causing a slipping phenomenon, and easily damaging the surface of the filter.

SUMMERY OF THE UTILITY MODEL

The utility model provides a problem how to increase filter assembly and disassembly tools's application scope, reduce the operating space that needs, improve the reliability.

In order to solve the problem, the utility model provides a filter clamping tool, including base, two at least activity clamp splices and actuating mechanism, the base is for having open-top's tubular structure, the activity clamp splice is installed the top of base, actuating mechanism is used for the drive the activity clamp splice is followed the radial movement of base, so that activity clamp splice centre gripping filter.

Compared with the prior art, the utility model provides a brand-new filter clamping tool, its simple structure is compact, adopts the tubular structure base to reduce occupation space, and the required operating space of dismouting filter is little, carries out the centre gripping to the filter through the activity clamp splice, and the radial movement of base can be followed to each activity clamp splice, has realized the flexible adjustment of centre gripping diameter, is applicable to the filter of different specifications, and the commonality is strong.

In a preferred or alternative embodiment, the movable clamping block comprises a clamping portion and a moving portion, the clamping portion is located at one end of the moving portion close to the axis of the base, and the moving portion is in driving connection with the driving mechanism.

Therefore, the driving mechanism can drive the movable clamping block to move and position, and the clamping reliability is ensured.

In a preferred or alternative embodiment, the clamping portion comprises two clamping legs, the two clamping legs being arranged at a predetermined angle.

Therefore, when the filter clamping tool is used, the two clamping legs are abutted to the outer wall surface of the filter, the angle between the clamping legs is controlled, the contact area of the clamping part and the filter can be adjusted, the clamping effect is improved, slipping is avoided, and the surface damage of the filter is prevented.

In a preferred or alternative embodiment, the surface of the clamping portion facing the axis of the base is provided with a resilient washer.

Therefore, the elastic gasket can increase the friction force between the clamping part and the filter, improve the clamping reliability and protect the surface of the filter.

In a preferred or alternative embodiment, a plurality of the movable clamping blocks are evenly distributed along the circumference of the top surface of the base.

Therefore, the stress of each part of the filter contacted with the movable clamping block is ensured to be uniform, and the filter is prevented from slipping or being damaged.

In a preferred or alternative embodiment, the filter holding tool further comprises an upper cover mounted on top of the base, the upper cover having a guide slot disposed radially along the base, the movable clamp block including a moving portion adapted to partially enter and move along the guide slot.

Therefore, the moving direction of the movable clamping block is limited through the guide groove, the movable clamping block is guaranteed to move along the radial direction, and dislocation is avoided.

In a preferred or alternative embodiment, the moving part is provided with a clamping groove which is opened towards the axis of the base, and the upper cover is suitable for being inserted into the clamping groove.

Therefore, the movable clamping block is limited in the up-down direction after the upper cover part is inserted into the clamping groove, and the movable clamping block is prevented from falling off from the base.

In a preferred or optional embodiment, the driving mechanism includes a driving bevel gear and a driven bevel gear, the driven bevel gear is rotatably disposed in the base, a large end surface of the driven bevel gear faces upward, gear teeth on a conical surface of the driving bevel gear are engaged with gear teeth on a conical surface of the driven bevel gear, the driving bevel gear includes a rotating head, the rotating head extends out from a side surface of the base, matching planar threads are disposed on the large end surface of the driven bevel gear and a bottom surface of the movable clamping block, and the movable clamping block is in threaded connection with the driven bevel gear.

From this, drive bevel gear can drive driven bevel gear and rotate, and driven bevel gear makes a plurality of movable clamp splice synchronous motion through screw drive, forms the changeable centre gripping space of diameter between the clamping part of a plurality of movable clamp splice, can be applicable to the filter of different specifications, and driven bevel gear and movable clamp splice pass through plane screw drive simultaneously, and the screw thread has the auto-lock characteristic, makes movable clamp splice rigidity, guarantees that the centre gripping is reliable.

In a preferred or optional embodiment, the driving mechanism comprises a worm wheel and a worm, the worm wheel is rotatably arranged in the base, the worm comprises a rotating shaft, the rotating shaft extends out of the side face of the base, the worm is meshed with the worm wheel, the top face of the worm wheel and the bottom face of the movable clamping block are provided with matched plane threads, and the movable clamping block is in threaded connection with the worm wheel.

From this, the worm can drive the turbine and rotate, and the turbine makes a plurality of movable clamp splice synchronous motion through the screw thread transmission, forms the changeable centre gripping space of diameter between the clamping part of a plurality of movable clamp splice, can be applicable to not unidimensional filter, and turbine and movable clamp splice pass through plane screw thread transmission simultaneously, and the screw thread has the auto-lock characteristic, makes movable clamp splice rigidity, guarantees that the centre gripping is reliable.

In a preferred or optional embodiment, the driving mechanism comprises screws with the same number as the movable clamping blocks, the movable clamping blocks are provided with screw holes, one end of each screw is fixed, and the other end of each screw enters the corresponding screw hole of the movable clamping block and is in threaded connection with the movable clamping block.

Therefore, a clamping space with the variable diameter is formed between the clamping parts of the movable clamping blocks, each movable clamping block can independently move through screw transmission, the filter can be suitable for an eccentric filter, meanwhile, the screw and the movable clamping blocks are in thread transmission, threads have a self-locking characteristic, the movable clamping blocks are fixed in position, and clamping reliability is guaranteed.

Drawings

FIG. 1 is a block diagram of a filter holding tool in an embodiment of the present invention;

FIG. 2 is a structural diagram of a movable clamping block in an embodiment of the present invention;

fig. 3 is a partial cross-sectional view of a filter holding tool in an embodiment of the present invention.

Description of reference numerals:

1-base, 2-movable clamping block, 21-clamping part, 211-first clamping foot, 212-second clamping foot, 22-moving part, 23-clamping groove, 3-upper cover, 31-guide groove, 4-driving bevel gear, 41-rotating head and 5-driven bevel gear.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description of the present invention and simplification of description, but do not indicate or imply that the device or element to which the term refers must have a specific orientation, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention. The utility model discloses a be provided with coordinate system XYZ in the drawing of embodiment, wherein the place ahead is represented to the forward of X axle, and the back is represented to the reverse of X axle, and the top is represented to the forward of Y axle, and the below is represented to the reverse of Y axle, and the left is represented to the forward of Z axle, and the right-hand representation of the reverse of Z axle.

Furthermore, in the description of the present invention, it should be noted that the terms "first" and "second" mentioned in the embodiments of the present invention are only used for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

The filter is an important accessory of the engine and is used for filtering impurities in the engine oil and keeping the engine oil clean. The filter needs to be replaced regularly, and in order to avoid scalding, the filter is generally disassembled through tools, but some problems exist in the actual operation process. The first is that the operation space is small when disassembling, and many tools cannot be suitable. Secondly, the filter shell facet is more smooth, and is relatively weak with handling instrument joint strength, and the interlock is not firm, often causes the phenomenon of skidding. An embodiment of the utility model provides a filter clamping tool for dismantle vehicle engine's filter, can overcome foretell technical problem.

As shown in fig. 1 to 3, the filter holding tool of the present embodiment includes a base 1, a driving mechanism, and three movable blocks 2. The base 1 is a cylindrical structure with an open top, and the movable clamping block 2 is arranged at the top of the base 1. Three movable clamp splice 2 is along base 1's top surface circumference evenly distributed, and movable clamp splice 2 includes removal portion 22 and clamping part 21 that link to each other, and removal portion 22 sets up along base 1's radial, and clamping part 21 is located the one end that removal portion 22 is close to base 1's axial lead, and clamping part 21 forms the centre gripping space towards base 1's axial lead between the three clamping part 21. The driving mechanism is arranged in the base 1 and used for driving the movable clamping block 2 to move along the radial direction of the base 1, so that the clamping part 21 is close to or far away from the axial lead of the base 1. When actuating mechanism drive activity clamp splice 2 removed towards the axial lead of base 1, the diameter in centre gripping space dwindled, and when actuating mechanism drive activity clamp splice 2 kept away from the axial lead removal of base 1, the diameter in centre gripping space increased to realized the flexible adjustment of centre gripping diameter, the clamping means can be applicable to the filter of different specifications, and the commonality is strong, and actuating mechanism can make activity clamp splice 2 fix a position, guarantees that the centre gripping is reliable.

This filter clamping tool simple structure is compact, adopts cylinder base 1 to reduce occupation space, and the required operating space of dismouting filter is little, and through 2 centre gripping filters of activity clamp splice, radial movement of base 1 can be followed to activity clamp splice 2, has realized the flexible regulation of centre gripping diameter, is applicable to different specification filters, and the commonality is good. In other embodiments, the number of the movable clamping blocks 2 can be 2-8, and the larger the number of the movable clamping blocks 2 is, the more the contact parts of the clamping tool and the filter are, the higher the clamping reliability is, and the slippage is not easy to occur. Further, a plurality of movable clamp splice 2 along base 1's top surface circumference evenly distributed to guarantee that the filter is even with each position atress of movable clamp splice 2 contact, be convenient for rotate the operation, prevent to skid or damage the filter.

Preferably, the bottom of the base 1 is provided with a sleeve hole or a sleeve joint suitable for being connected with a socket wrench, after the clamping tool is clamped and connected with the filter, the socket wrench is connected with the clamping tool, the clamping tool and the filter are rotated by the socket wrench, and the filter is more labor-saving to disassemble.

Referring to fig. 2, the movable clamping block 2 includes a moving portion 22 and a clamping portion 21 connected to each other, the moving portion 22 is disposed along the radial direction of the base 1, and the clamping portion 21 faces the axial line of the base 1. The clamping portion 21 comprises a first clamping foot 211 and a second clamping foot 212, the angle between which is 120 °. When the filter clamping tool is used, the three clamping parts 21 form a regular hexagon clamping space, and the first clamping leg 211 and the second clamping leg 212 are abutted against the outer wall surface of the filter, so that the clamping is reliable.

On the surface of the clamping part 21 facing to the axial lead of the base 1, the first clamping leg 211 and the second clamping leg 212 are connected through a circular arc surface, so that the contact area between the clamping part 21 and the filter is increased, and the surface of the filter is prevented from being damaged.

In other embodiments, the angle between the first and

second legs

211, 212 defining the clamping portion 21 is between 90 ° and 150 °. If the angle between the first clamping leg 211 and the second clamping leg 212 is too small, the contact area between the clamping portion 21 and the filter is small, and the surface of the filter is easily damaged, and if the angle between the first clamping leg 211 and the second clamping leg 212 is too large, the clamping portion 21 cannot effectively clamp the filter, and the clamping tool is easily slipped. Thus defining an angle between the first clamping leg 211 and the second clamping leg 212, ensuring a reliable clamping without damaging the filter.

Preferably, an elastic gasket is arranged on the surface of the clamping part 21 facing the axial lead of the base 1, and when the filter clamping tool is used, the elastic gasket is in contact with the surface of the filter, so that the friction force between the clamping part 21 and the filter is increased, and meanwhile, the surface of the filter can be protected.

Further, the filter holding tool includes an upper cover 3, and the upper cover 3 is provided on top of the base 1. The upper cover 3 is further provided with three guide grooves 31 extending along the radial direction of the base 1, and the positions of the guide grooves 31 correspond to the movable clamping blocks 2. The moving part 22 is provided with a clamping groove 23 with an opening facing to the axial lead of the base 1, the clamping groove 23 is arranged in parallel with the upper cover 3, the edge of the upper cover 3 is inserted into the clamping groove 23, the part of the moving part 22 positioned at the lower side of the clamping groove 23 enters the guide groove 31, and the part positioned at the upper side of the clamping groove 23 exceeds the top surface of the upper cover 3. From this upper cover 3 is spacing to activity clamp splice 2 in the upper and lower direction, avoids activity clamp splice 2 to drop from base 1, and the moving direction of guide way 31 restriction removal portion 22 guarantees that activity clamp splice 2 prevents the dislocation along base 1 radial movement simultaneously.

As shown in fig. 3, the driving mechanism includes a driving bevel gear 4 and a driven bevel gear 5, wherein the teeth of the driving bevel gear 4 are engaged with the teeth of the driven bevel gear 5, and the driving bevel gear 4 drives the driven bevel gear 5 to rotate when rotating. Driven bevel gear 5 installs in base 1, and its big terminal surface sets up, and the tip sets up down, and the tip is equipped with downward bellied pivot, is equipped with the recess that holds this pivot on base 1, and driven bevel gear 5 can follow the relative base 1 rotation of pivot. The driving bevel gear 4 comprises a rotating head 41, the rotating head 41 extends out of the side surface of the base 1, and a hexagonal hole is formed in the rotating head 41 and can rotate by using an inner hexagonal socket. The large end face of the driven bevel gear 5 is provided with a plane thread, the bottom face of the moving part 22 is provided with a matched plane thread, and the movable clamping block 2 is in threaded connection with the driven bevel gear 5. An operator rotates the driving bevel gear 4 to drive the driven bevel gear 5 to rotate, and the driven bevel gear 5 enables the movable clamping blocks 2 to synchronously move through thread transmission, so that the size of a clamping space between the movable clamping blocks 2 is changed, and filters with different specifications are clamped.

Furthermore, the lead angle of the plane thread on the large end surface of the driven bevel gear 5 and the bottom surface of the moving part 22 meets the self-locking requirement, and the position of the movable clamping block 2 is fixed by utilizing the self-locking characteristic of the thread, so that the reliable clamping is ensured.

The usage method of the filter clamping tool of the embodiment is as follows: rotating the driven bevel gear 5 along one direction to enable each movable clamping block 2 to move towards the direction far away from the axial lead of the base 1, and increasing the distance between the clamping parts 21 of each movable clamping block 2 until the filter can enter the clamping space between the clamping parts 21; the clamping tool is aligned with the filter to move, and the movable clamping blocks 2 are distributed around the filter; the driven bevel gear 5 is rotated reversely, each movable clamping block 2 moves towards the axial lead of the base 1 along the radial direction of the base 1 until the first clamping leg 211 and the second clamping leg 212 of each clamping part 21 are abutted against the surface of the filter; at the moment, the filter is clamped by the movable clamping blocks 2, and the filter can be driven to synchronously rotate by rotating the base 1 so as to be detached.

The filter clamping tool provided by the embodiment has the advantages that the structure is simple and compact, the space needed by the disassembly operation is small, the clamping diameter can be flexibly and continuously adjusted, the universality is strong, the clamping is reliable, the slippage is not easy to occur, the problems in the prior art are solved, and the high practical value and the market application prospect are realized.

Another embodiment of the present invention provides another filter clamping tool, which comprises a base 1, an upper cover 3, a driving mechanism and four movable clamping blocks 2. The base 1 is a cylinder with an open top, a turned edge is arranged at the open top, and the upper cover 3 is installed at the top of the base 1 and connected with the turned edge through a screw, so that the connection is reliable. The movable clamping blocks 2 are arranged on the base 1, and the four movable clamping blocks 2 are uniformly distributed along the circumferential direction of the top surface of the base 1.

The movable clamping block 2 comprises a moving part 22 and a clamping part 21 which are connected, the moving part 22 is arranged along the radial direction of the base 1, the clamping part 21 faces to the axial lead of the base 1, and a clamping space is formed among the four clamping parts 21. The clamping part 21 comprises a first clamping leg 211 and a second clamping leg 212, the angle between the first clamping leg 211 and the second clamping leg 212 is 90 degrees, when the clamping tool is used, the four clamping parts 21 form a square clamping space, the first clamping leg 211 and the second clamping leg 212 are abutted to the outer wall surface of the filter, and the clamping is reliable.

The upper cover 3 is further provided with four guide grooves 31 extending along the radial direction of the base 1, the positions of the guide grooves 31 correspond to the movable clamping blocks 2, and the lower parts of the moving parts 22 enter the guide grooves 31. The guide groove 31 plays a role in moving and guiding, and ensures that the movable clamping block 2 moves along the radial direction of the base 1 to prevent dislocation.

The driving mechanism is used for driving the movable clamping block 2 to move along the radial direction of the base 1, so that the clamping part 21 is close to or far away from the axial lead of the base 1. The driving mechanism comprises a worm wheel and a worm, and threads on the worm are meshed with gear teeth of the worm wheel. The worm wheel is installed in the base 1, and the worm includes the axis of rotation, and the axis of rotation stretches out from base 1 side, and the axis of rotation has the structure of being convenient for exert the turning force, and the manipulation worm is rotated to convenient to handle such as handle, hexagonal hole, screw thread etc.. The top surface of the turbine is provided with a plane thread, the bottom surface of the moving part 22 is provided with a matched plane thread, and the movable clamping block 2 is in threaded connection with the turbine. An operator drives the worm wheel to rotate by rotating the worm, and the worm wheel enables the movable clamping blocks 2 to synchronously move through thread transmission, so that the size of a clamping space between the movable clamping blocks 2 is changed, and filters with different specifications are clamped. The lift angle of the plane thread on the bottom surface of the turbine and moving part 22 meets the self-locking requirement, and the movable clamping block 2 is fixed by utilizing the self-locking characteristic of the thread, so that the reliable clamping is ensured.

Another embodiment of the present invention provides another filter clamping tool, which includes a base 1, an upper cover 3, a driving mechanism and six movable clamping blocks 2. The base 1 is a cylinder with an open top, and the upper cover 3 is arranged on the top of the base 1 and is clamped with the base 1. The movable clamping blocks 2 are arranged on the base 1, and the six movable clamping blocks 2 are uniformly distributed along the circumferential direction of the top surface of the base 1.

The movable clamping block 2 comprises a moving part 22 and a clamping part 21 which are connected, the upper cover 3 is provided with six guide grooves 31 which extend along the radial direction of the base 1, the positions of the guide grooves 31 correspond to the movable clamping block 2, and the lower part of the moving part 22 enters the guide grooves 31. The clamping portions 21 face the axial line of the base 1, and clamping spaces are formed among the six clamping portions 21. The clamping portion 21 comprises a first clamping foot 211 and a second clamping foot 212, the angle between which is 150 °.

The driving mechanism comprises six screw rods, and each screw rod is used for controlling the movement of one movable clamping block 2. A screw hole is formed in the moving portion 22, an internal thread is formed in the inner wall of the screw hole, and an external thread is formed in the outer surface of the screw. One end of the screw is fixed, a fixing bracket can be arranged on the base to fix the screw, and the other end of the screw penetrates through a screw hole of the moving part 22 to be in threaded connection with the movable clamping block 2. The fixed end of screw rod position is equipped with the handle, is convenient for rotate the screw rod. When the screw rod rotates, the movable clamping block 2 is driven to move along the radial direction of the base 1 and is close to or far away from the axial lead of the base 1. The thread lead angle of the screw hole internal thread and the screw external thread meets the self-locking requirement, and the screw drives the movable clamping block 2 to move and fix the position, so that the clamping reliability of the clamping tool is ensured.

Each movable clamping block 2 of the filter clamping tool is driven by an independent screw rod and is not restricted, so that clamping parts 21 of the movable clamping blocks 2 form a clamping space with a variable diameter, the clamping space can be suitable for eccentric filters, and the application range is further improved.

In the description herein, references to the description of the terms "an example," "one example," and "one implementation," etc., mean that a particular feature, structure, material, or characteristic described in connection with the example or implementation is included in at least one example or implementation of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or implementation. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or implementations.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. The filter clamping tool is characterized by comprising a base (1), at least two movable clamping blocks (2) and a driving mechanism, wherein the base (1) is of a cylindrical structure with an open top, the movable clamping blocks (2) are installed at the top of the base (1), and the driving mechanism is used for driving the movable clamping blocks (2) to move along the radial direction of the base (1) so that the movable clamping blocks (2) clamp a filter; the movable clamping block (2) comprises a clamping part (21), the clamping part (21) is close to the axial lead of the base (1), the clamping part (21) comprises two clamping feet, the two clamping feet are arranged at preset angles, and the two clamping feet are used for being abutted to the outer wall surface of the filter.

2. The filter clamping tool of claim 1, wherein the movable clamping block (2) further comprises a moving part (22), the clamping part (21) is located at one end of the moving part (22) close to the axial lead of the base (1), and the moving part (22) is in driving connection with the driving mechanism.

3. A filter clamping tool as claimed in claim 2, characterised in that the surface of the clamping portion (21) facing the axis of the base (1) is provided with a resilient pad.

4. The filter clamping tool of claim 1, wherein a plurality of the movable clamping blocks (2) are evenly distributed circumferentially on the top surface of the base (1).

5. The filter clamping tool of claim 2, further comprising an upper cover (3), the upper cover (3) being mounted on top of the base (1), the upper cover (3) having a guide groove (31) arranged radially of the base (1), the movable clamping block (2) comprising a moving portion (22), the moving portion (22) being adapted to partially enter the guide groove (31) and move along the guide groove (31).

6. Filter holding tool according to claim 5, wherein the displacement part (22) is provided with a clamping groove (23) opening towards the axis of the base (1), the upper cover (3) being adapted to be inserted into the clamping groove (23).

7. The filter holding tool according to any one of claims 1-6, wherein the driving mechanism comprises a driving bevel gear (4) and a driven bevel gear (5), the driven bevel gear (5) is rotatably disposed in the base (1), the large end face of the driven bevel gear (5) faces upwards, the driving bevel gear (4) comprises a rotating head (41), the rotating head (41) extends out from the side face of the base (1), the teeth on the conical surface of the driving bevel gear (4) are engaged with the teeth on the conical surface of the driven bevel gear (5), the large end face of the driven bevel gear (5) and the bottom face of the movable clamping block (2) are provided with matching planar threads, and the movable clamping block (2) is in threaded connection with the driven bevel gear (5).

8. A filter holding tool according to any one of claims 1-6, characterized in that the driving mechanism comprises a worm gear and a worm, the worm gear is rotatably arranged in the base (1), the worm comprises a rotating shaft, the rotating shaft extends out from the side surface of the base (1), the worm is meshed with the worm gear, the top surface of the worm gear and the bottom surface of the movable clamping block (2) are provided with matching plane threads, and the movable clamping block (2) is in threaded connection with the worm gear.

9. The filter holding tool according to any one of claims 1 to 6, wherein the driving mechanism comprises a number of screws equal to the number of the movable clamping blocks (2), the movable clamping blocks (2) are provided with screw holes, one end of each screw is fixed, and the other end of each screw enters the corresponding screw hole of the movable clamping block (2) and is in threaded connection with the movable clamping block (2).