Device for automatically winding magnetic tape into the inner wall of a circular casing

Abstract

The application discloses a kind of glue magnetic strip automatic winding into circular shell inner wall device;Belong to magnetic strip forming assembly technical field;Its technical key points include base, the base is provided with support, magnetic strip winding round piece is arranged on support.In the support on the side of magnetic strip winding round piece is equipped with magnetic strip conveying mechanism, long magnetic strip is sent into magnetic strip winding round piece by magnetic strip conveying mechanism and is wound into circular shape;Magnetic strip winding round piece below the base is equipped with shell conveying mechanism, and pressing mechanism is arranged on the support above magnetic strip winding round piece.Shell conveying mechanism sends shell to the just below magnetic strip winding round piece, and the magnetic strip that is formed in magnetic strip winding round piece is pressed into shell inner wall by pressing mechanism;The application aims to provide a kind of compact structure, high-efficiency quality glue magnetic strip automatic winding into circular shell inner wall device;For glue magnetic strip automatic winding into circular shell inner wall.

Description

Technical Field

[0001] This invention relates to an automatic forming and assembly device for adhesive magnetic strips, and more specifically, to a device for automatically rolling adhesive magnetic strips into the inner wall of a circular housing. Background Technology

[0002] When manufacturing a brushless DC external rotor fan motor, the magnets used are straight strips of adhesive magnets. These need to be wound into the housing and tightly fitted to the inner wall of the housing. If the adhesive magnet strips are manually wound into a circle and installed into the housing, the wound ends of the magnetic strips are prone to misalignment, resulting in uneven and non-uniform inner diameters of the circular magnetic strips. This leads to poor product quality and low efficiency. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of the prior art by providing a compact, efficient, and high-quality device for automatically winding magnetic strips into the inner wall of a circular housing.

[0004] The technical solution of this invention is implemented as follows:

[0005] A device for automatically winding magnetic strips into the inner wall of a circular housing includes a base, a support on the base, and a magnetic strip winding component on the support. A magnetic strip conveying mechanism is provided on the support side of the magnetic strip winding component, through which a long magnetic strip is fed into the magnetic strip winding component and wound into a circle.

[0006] A housing conveying mechanism is provided on the base below the magnetic strip roll, and a pressing mechanism is provided on the support above the magnetic strip roll. The housing conveying mechanism transports the housing to directly below the magnetic strip roll, and the formed magnetic strip in the magnetic strip roll is pressed into the inner wall of the housing by the pressing mechanism.

[0007] The upper part of the aforementioned magnetic strip rolling component is a pre-rolled cylindrical section, and the lower part is an extruded rolled section in the shape of an inverted frustum. The angle α between the generatrix of the frustum shape of the extruded rolled section and the horizontal plane is 75-85°. The inner diameter of the lower end of the extruded rolled section is smaller than the inner diameter of the housing.

[0008] The aforementioned magnetic stripe conveying mechanism includes a feed seat arranged horizontally at the feed end of the magnetic stripe roll, and a feed groove formed along the length direction on the feed seat that communicates with the feed end of the magnetic stripe roll.

[0009] A first feeding mechanism that cooperates with the feeding trough is provided on the bracket. The long magnetic strip located in the feeding trough is pushed into the magnetic strip rolling part by the first feeding mechanism.

[0010] The aforementioned first feeding mechanism includes a linear guide rail horizontally mounted on the side support of the magnetic strip roll, a first sliding seat on the linear guide rail slider, a cantilever mounted on the first sliding seat, and a push block vertically mounted at the free end of the cantilever.

[0011] A first horizontal cylinder is arranged on the bracket and parallel to the linear guide, and the free end of the piston rod of the first horizontal cylinder is connected with the first sliding seat.

[0012] The casing conveying mechanism comprises a guide groove arranged on the base between the casing feeding station and the magnetic stripe roll forming member, and a second sliding seat is arranged in the guide groove, and a casing positioning pin for positioning the center hole of the casing is arranged on the second sliding seat. A positioning stopper is arranged on one end of the guide groove close to the magnetic stripe roll forming member.

[0013] A second feeding mechanism matched with the second sliding seat is arranged on the base, and the casing is conveyed to the position below the magnetic stripe roll forming member through the cooperation of the second sliding seat and the second feeding mechanism.

[0014] The second feeding mechanism comprises a connecting block arranged on the bottom of the second sliding seat, and an elongated hole matched with the connecting block is arranged on the base along the length direction of the guide groove.

[0015] A second horizontal cylinder is arranged on the bottom of the base along the length direction of the guide groove, and an elastic joint connected with the connecting block is arranged on the free end of the piston rod of the second horizontal cylinder.

[0016] The elastic joint comprises a connecting seat screwed with the piston rod of the second horizontal cylinder, and a guide column is integrally formed on the free end of the connecting seat in the axial direction, and the outer diameter of the guide column is smaller than that of the connecting seat.

[0017] A guide hole matched with the guide column is arranged on the connecting block, a limiting bolt is screwed on the free end of the guide column, the outer diameter of the limiting bolt is larger than that of the guide column, and a buffer spring is sleeved on the guide column between the connecting block and the limiting bolt.

[0018] The pressing mechanism comprises a lifting cylinder arranged on the bracket above the magnetic stripe roll forming member in the vertical direction, a self-adaptive rotating assembly is connected with the free end of the piston rod of the lifting cylinder, and a pressing head is rotatably connected with the self-adaptive rotating assembly.

[0019] The pressing head comprises a connecting head rotatably connected with the self-adaptive rotating assembly, a pressing plate integrally formed on the lower end of the connecting head, and a guide limiting ring integrally formed on the lower end of the pressing plate.

[0020] The outer diameter of the pressing plate is smaller than the inner diameter of the lower end of the extrusion roll forming part and larger than the inner diameter of the circle formed when the magnetic stripe is located in the pre-roll forming part. The outer diameter of the limiting ring is smaller than the inner diameter of the circle formed when the magnetic stripe is located in the lower end of the extrusion roll forming part.

[0021] The adhesive strip tensioned on the inner wall of the pre-roll forming part is pressed into the extrusion roll forming part by the driving of the lifting cylinder and the pressing of the pressing plate, and then pressed into the casing.

[0022] The adaptive rotating assembly comprises a lifting seat connected to the free end of the piston rod of the lifting cylinder, and a rolling bearing connected to the connecting head at the lower end of the lifting seat.

[0023] A clamping type lifting guide seat is fixedly connected to the outer wall of the upper part of the lifting seat, a wear-resistant bushing is arranged vertically on the bracket at the side of the lifting cylinder, and a guide rod is movably arranged in the wear-resistant bushing, and the lower end of the guide rod is fixedly connected to the clamping type lifting guide seat.

[0024] The clamping type lifting guide seat is an integral structure, and locking holes adapted to the guide rod and the lifting seat are arranged on the clamping type lifting guide seat, a long hole passing through two connecting holes is formed on the clamping type lifting guide seat between the two locking holes, connecting holes are arranged on the clamping type lifting guide seat on the two sides of the long hole, and a fastening screw is locked through the connecting holes to clamp the guide rod and the lifting seat in the corresponding locking holes.

[0025] After the structure is adopted, the long magnetic strip and the shell are first placed on the corresponding conveying mechanism, the magnetic strip conveying mechanism sends the long magnetic strip into the magnetic strip coiling member to automatically form, the shell conveying mechanism sends the magnetic strip to below the magnetic strip coiling member, and then the pressing mechanism presses the circular magnetic strip into the inner cavity of the shell, so that the magnetic strip is automatically coiled and pressed into the shell, the efficiency is greatly improved, the inner diameter of the automatically formed circular magnetic strip is accurate, and the stability of product quality can be ensured. BRIEF DESCRIPTION OF DRAWINGS

[0026] The application will be further described in detail below with reference to the embodiments in the drawings, but does not constitute any limitation to the application.

[0027] Figure 1 is a structural schematic view of the application;

[0028] Figure 2 is a top view of the application;

[0029] Figure 3 is a side view of the application;

[0030] Figure 4 is a schematic view of the cooperation between the magnetic strip coiling member and the pressing head;

[0031] Figure 5 is a structural schematic view of the second sliding seat;

[0032] Figure 6 is a structural schematic view of the clamping type lifting guide seat.

[0033] In the figure: 1, base; 2, support; 3, magnetic strip rolling member; 3a, pre-rolling part; 3b, extrusion rolling part; 4, magnetic strip conveying mechanism; 4a, feeding seat; 4b, feeding groove; 4c, first feeding mechanism; 4d, linear guide rail; 4e, first sliding seat; 4f, cantilever; 4g, pushing block; 4h, first horizontal air cylinder; 5, shell conveying mechanism; 5a, guide groove; 5b, second sliding seat; 5c, shell positioning pin; 5d, positioning stopper; 5e, second feeding mechanism; 5f, connecting block; 5i, elastic joint; 5j, connecting seat; 5k, guide column; 5l, guide hole; 5m, limiting bolt; 5n, buffer spring; 6, pressing mechanism; 6a, lifting air cylinder; 6b, self-adaptive rotating assembly; 6c, pressing head; 6d, connecting head; 6e, pressing plate; 6f, guide limiting ring; 6g, lifting seat; 6h, rolling bearing; 6i, clamping type lifting guide seat; 6j, wear-resistant shaft sleeve; 6k, guide rod; 6l, locking hole; 6m, long hole; 6n, connecting hole. DETAILED DESCRIPTION

[0034] Referring to Figure 1 The device for automatically rolling a magnetic strip into a circular shell according to the present application is shown in the figure, which comprises a base 1, a support 2 provided on the base 1, and a magnetic strip rolling member 3 provided on the support 2. A magnetic strip conveying mechanism 4 is provided on the support 2 at the side of the magnetic strip rolling member 3, and a long magnetic strip is fed into the magnetic strip rolling member 3 through the magnetic strip conveying mechanism 4 to be rolled into a circle.

[0035] A shell conveying mechanism 5 is provided on the base below the magnetic strip rolling member 3, and a pressing mechanism 6 is provided on the support 2 above the magnetic strip rolling member 3. The shell conveying mechanism 5 conveys a shell to be directly below the magnetic strip rolling member 3, and the magnetic strip shaped in the magnetic strip rolling member 3 is pressed into the inner wall of the shell through the pressing mechanism 6.

[0036] The upper part of the magnetic strip rolling member 3 is a pre-rolling part 3a in the shape of a cylinder, and the lower part is an extrusion rolling part 3b in the shape of an inverted circular truncated cone. In this embodiment, the included angle a between the generatrix of the circular truncated cone shape of the extrusion rolling part 3b and the horizontal plane is 85°, and the inner diameter of the lower end of the extrusion rolling part 3b is 2 mm smaller than the inner diameter of the shell, so that the magnetic strip can smoothly fit the inner diameter of the shell after being extruded and shaped.

[0037] In this embodiment, the pressing mechanism 6 comprises a lifting air cylinder 6a provided vertically on the support 2 above the magnetic strip rolling member 3, a self-adaptive rotating assembly 6b connected to the free end of the piston rod of the lifting air cylinder 6a, and a pressing head 6c rotatably connected to the self-adaptive rotating assembly 6b.

[0038] Preferably, the pressing head 6c is composed of a connecting head 6d connected with the adaptive rotating assembly 6b, a pressing plate 6e integrally formed at the lower end of the connecting head 6d, and a guide limiting ring 6f integrally formed at the lower end of the pressing plate 6e. During the process of pressing the magnetic stripe, the inner diameter of the circle formed by the magnetic stripe is shaped to be able to smoothly enter the inner wall of the shell through the cooperation of the guide limiting ring and the inner wall of the extrusion round part.

[0039] Further preferably, the outer diameter of the pressing plate 6e is smaller than the inner diameter of the lower end of the extrusion round part 3b and larger than the inner diameter of the circle formed by the magnetic stripe when located in the pre-round part 3a. The outer diameter of the guide limiting ring 6f is smaller than the inner diameter of the circle formed by the magnetic stripe when located in the lower end of the extrusion round part 3b.

[0040] The adhesive tape tensioned on the inner wall of the pre-round part 3a is pressed into the extrusion round part 3b and then into the shell by the pressing plate 6e driven by the lifting cylinder 6a.

[0041] Preferably, the adaptive rotating assembly 6b in the embodiment includes a lifting seat 6g connected to the free end of the piston rod of the lifting cylinder 6a, and a rolling bearing 6h connected to the connecting head 6d at the lower end of the lifting seat 6g. During the pressing process, the sliding friction between the magnetic stripe and the pressing head is changed to rolling friction through the rolling bearing, reducing the resistance received by the magnetic stripe during the rounding process.

[0042] A clamping type lifting guide seat 6i is fixedly connected to the outer wall of the upper part of the lifting seat 6g, a wear-resistant shaft sleeve 6j is vertically arranged on the side of the bracket 2, a guide rod 6k is movably arranged in the wear-resistant shaft sleeve 6j, and the lower end of the guide rod 6k is fixedly connected with the clamping type lifting guide seat 6i.

[0043] The clamping type lifting guide seat 6i is an integral structure, locking holes 6l adapted to the guide rod 6k and the lifting seat 6g are arranged on the clamping type lifting guide seat 6i, a long hole 6m passing through the two locking holes 6l is formed on the clamping type lifting guide seat 6i between the two locking holes 6l, matching connecting holes 6n are arranged on the clamping type lifting guide seat 6i on both sides of the long hole 6m, and a fastening screw passes through the connecting holes 6n to lock and clamp the guide rod 6k and the lifting seat 6g located in the corresponding locking holes 6l.

[0044] Preferably, the magnetic stripe conveying mechanism 4 in the embodiment includes a feeding seat 4a arranged horizontally at the feeding end of the magnetic stripe rounding piece 3, and a feeding groove 4b is formed on the feeding seat 4a in the length direction and is in communication with the feeding end of the magnetic stripe rounding piece 3.

[0045] A first feeding mechanism 4c is arranged on the bracket 2 and cooperates with the feeding groove 4b, and the long magnetic stripe located in the feeding groove 4b is pushed into the magnetic stripe rounding piece 3 by the first feeding mechanism 4c.

[0046] In the embodiment, the first feeding mechanism 4c comprises a linear guide rail 4d horizontally arranged on the side support 2 of the magnetic strip coiling member 3, a first sliding seat 4e arranged on the sliding block of the linear guide rail 4d, and a cantilever 4f arranged on the first sliding seat 4e. A pushing block 4g is arranged on the free end of the cantilever 4f in the vertical direction.

[0047] A first horizontal air cylinder 4h is arranged on the support 2 and parallel to the linear guide rail 4d. The free end of the piston rod of the first horizontal air cylinder 4h is connected with the first sliding seat 4e. In actual application, other horizontal driving forms can be used for the first feeding mechanism, such as that the piston rod of the air cylinder is directly connected with the pushing block, or a motor and a screw rod are used to replace the air cylinder.

[0048] In the embodiment, the shell conveying mechanism 5 comprises a guide groove 5a arranged on the base 1 between the shell feeding station and the magnetic strip coiling member 3. A second sliding seat 5b is arranged in the guide groove 5a. A shell positioning pin 5c for positioning the center hole of the shell is arranged on the second sliding seat 5b. A positioning stopper 5d is arranged on the end of the guide groove 5a close to the magnetic strip coiling member 3. When the second sliding seat moves to the position below the magnetic strip coiling member 3, it collides with the positioning stopper and stops. The position of the second sliding seat is limited by the positioning stopper, so that the shell and the inner diameter of the extrusion coiling part are located on the same coaxial position, and it is ensured that the magnetic strip can be smoothly pressed into the shell.

[0049] A second feeding mechanism 5e matched with the second sliding seat 5b is arranged on the base 1. The shell is conveyed to the position below the magnetic strip coiling member 3 by the cooperation of the second sliding seat 5b and the second feeding mechanism 5e.

[0050] In the embodiment, the second feeding mechanism 5e comprises a connecting block 5f arranged on the bottom of the second sliding seat 5b. An elongated hole 5g matched with the connecting block 5f is arranged on the base 1 along the length direction of the guide groove 5a.

[0051] A second horizontal air cylinder 5h is arranged on the bottom of the base 1 along the length direction of the guide groove 5a. An elastic joint 5i connected with the connecting block 5f is arranged on the free end of the piston rod of the second horizontal air cylinder 5h.

[0052] The elastic joint 5i comprises a connecting seat 5j threadedly connected with the piston rod of the second horizontal air cylinder 5h. A guide column 5k is integrally formed on the free end of the connecting seat 5j in the axial direction. The outer diameter of the guide column 5k is smaller than that of the connecting seat 5j.

[0053] The connecting block 5f is provided with a guide hole 5l matched with the guide column 5k, a limiting bolt 5m is threadedly connected to the free end of the guide column 5k, the limiting bolt 5m has an outer diameter larger than that of the guide column 5k, and a buffer spring 5n is sleeved on the guide column 5k between the connecting block 5f and the limiting bolt 5m. When the second sliding seat moves to the stop position below the magnetic stripe rolling member and collides with the positioning stopper, the connecting block slides on the guide column, is buffered and reset by the buffer spring, and damage to the air cylinder can be reduced.

[0054] When the present application is used, first, the long magnetic stripe is manually put into the feeding groove, the casing is placed on the second sliding seat and the center of the casing is matched with the casing positioning pin. The start button is pressed to start working, the magnetic stripe is pushed into the pre-rolling part of the magnetic stripe rolling member by the pushing block driven by the first horizontal cylinder, and the casing is transported below the magnetic stripe rolling member by the second sliding seat driven by the second horizontal cylinder. After the magnetic stripe and the casing are both transported to the position, the lifting cylinder pushes the pressing head to press down, so that the magnetic stripe is formed and enters the inner cavity of the casing. Finally, the lifting cylinder, the first horizontal cylinder and the second horizontal cylinder are sequentially retreated, and the product is taken out.

[0055] The above-mentioned embodiments are the preferred embodiments of the present application, which are only used to facilitate the description of the present application and do not limit the present application in any form. Any person with ordinary knowledge in the art can make equivalent embodiments by making partial changes or modifications within the scope of the technical features of the present application without departing from the technical features of the present application, and the equivalent embodiments still belong to the scope of the technical features of the present application.

Claims

1. A device for automatic winding of a magnetic tape into the inner wall of a circular casing, comprising a base (1), characterized in that, The base (1) is provided with a support (2), and a magnetic stripe coiling piece (3) is arranged on the support (2); a magnetic stripe conveying mechanism (4) is arranged on the support (2) at the side of the magnetic stripe coiling piece (3); a long magnetic stripe is sent into the magnetic stripe coiling piece (3) through the magnetic stripe conveying mechanism (4) to be coiled into a circle; A machine shell conveying mechanism (5) is arranged on the base below the magnetic stripe coiling piece (3), and a pressing mechanism (6) is arranged on the support (2) above the magnetic stripe coiling piece (3); the machine shell conveying mechanism (5) conveys a machine shell to be directly below the magnetic stripe coiling piece (3), and the magnetic stripe formed in the magnetic stripe coiling piece (3) is pressed into the inner wall of the machine shell through the pressing mechanism (6); The upper part of the magnetic stripe coiling piece (3) is a pre-coiling part (3a) in a cylindrical shape, and the lower part is an extrusion coiling part (3b) in an inverted circular truncated cone shape; the included angle alpha between the generatrix of the circular truncated cone shape of the extrusion coiling part (3b) and the horizontal plane is 75-85°; the inner diameter of the lower end of the extrusion coiling part (3b) is smaller than the inner diameter of the machine shell; The pressing mechanism (6) comprises a lifting cylinder (6a) arranged on the support (2) above the magnetic stripe coiling piece (3) in the vertical direction, a self-adapting rotating assembly (6b) connected to the free end of the piston rod of the lifting cylinder (6a), and a pressing head (6c) rotatably connected to the self-adapting rotating assembly (6b); The pressing head (6c) is composed of a connecting head (6d) rotatably connected with the self-adapting rotating assembly (6b), a pressing plate (6e) integrally formed at the lower end of the connecting head (6d), and a guide limiting ring (6f) integrally formed at the lower end of the pressing plate (6e); The outer diameter of the pressing plate (6e) is smaller than the inner diameter of the lower end of the extrusion coiling part (3b) and greater than the inner diameter of the circle formed when the magnetic stripe is located in the pre-coiling part (3a); and the outer diameter of the guide limiting ring (6f) is smaller than the inner diameter of the circle formed when the magnetic stripe is located at the lower end of the extrusion coiling part (3b); The magnetic stripe tensioned on the inner wall of the pre-coiling part (3a) is pressed into the extrusion coiling part (3b) to be formed and then pressed into the machine shell by driving the pressing plate (6e) of the lifting cylinder (6a); The self-adapting rotating assembly (6b) comprises a lifting seat (6g) connected to the free end of the piston rod of the lifting cylinder (6a), and a rolling bearing (6h) connected with the connecting head (6d) is arranged at the lower end of the lifting seat (6g); A clamping type lifting guide seat (6i) is fixedly connected to the outer wall of the upper part of the lifting seat (6g), a wear-resistant shaft sleeve (6j) is arranged on the support (2) in the vertical direction at the side of the lifting cylinder (6a), a guide rod (6k) is movably arranged in the wear-resistant shaft sleeve (6j), and the lower end of the guide rod (6k) is fixedly connected with the clamping type lifting guide seat (6i); The machine shell conveying mechanism (5) comprises a guide groove (5a) arranged on the base (1) between a machine shell feeding station and the magnetic stripe coiling piece (3), a second sliding seat (5b) arranged in the guide groove (5a), and a machine shell positioning pin (5c) arranged on the second sliding seat (5b) and used for positioning the center hole of the machine shell; a positioning stop block (5d) is arranged on one end of the guide groove (5a) close to the magnetic stripe coiling piece (3). The second feeding mechanism (5e) is arranged on the base (1) and matched with the second sliding base (5b), and the shell is conveyed to the lower side of the magnetic stripe roll (3) through the cooperation of the second sliding base (5b) and the second feeding mechanism (5e); The second feeding mechanism (5e) comprises a connecting block (5f) arranged at the bottom of the second sliding base (5b), and an elongated hole (5g) matched with the connecting block (5f) is arranged on the base (1) along the length direction of the guide groove (5a); A second horizontal air cylinder (5h) is arranged on the bottom of the base (1) along the length direction of the guide groove (5a), and an elastic joint (5i) connected with the connecting block (5f) is arranged on the free end of the piston rod of the second horizontal air cylinder (5h). The elastic joint (5i) comprises a connecting seat (5j) threadedly connected with the piston rod of the second horizontal air cylinder (5h), a guide column (5k) is integrally formed on the free end of the connecting seat (5j) in the axial direction, and the outer diameter of the guide column (5k) is smaller than that of the connecting seat (5j). A guide hole (5l) matched with the guide column (5k) is arranged on the connecting block (5f), a limiting bolt (5m) is threadedly connected with the free end of the guide column (5k), the outer diameter of the limiting bolt (5m) is larger than that of the guide column (5k), and a buffer spring (5n) is sleeved on the guide column (5k) between the connecting block (5f) and the limiting bolt (5m).

2. A device for automatically winding a magnetic tape into the inner wall of a circular casing according to claim 1, characterized in that, The magnetic stripe conveying mechanism (4) comprises a feeding seat (4a) arranged on the feeding end of the magnetic stripe roll (3) in the horizontal direction, and a feeding groove (4b) matched with the feeding end of the magnetic stripe roll (3) is formed on the feeding seat (4a) in the length direction. A first feeding mechanism (4c) matched with the feeding groove (4b) is arranged on the support (2), and the long magnetic stripe in the feeding groove (4b) is pushed into the magnetic stripe roll (3) through the first feeding mechanism (4c).

3. A device for automatically winding a magnetic tape into the inner wall of a circular casing according to claim 2, characterized in that, The first feeding mechanism (4c) comprises a linear guide rail (4d) arranged horizontally on the side support (2) of the magnetic stripe roll (3), a first sliding base (4e) arranged on the sliding block of the linear guide rail (4d), a cantilever (4f) arranged on the first sliding base (4e), and a pushing block (4g) arranged vertically on the free end of the cantilever (4f). A first horizontal air cylinder (4h) parallel to the linear guide rail (4d) is arranged on the support (2), and the free end of the piston rod of the first horizontal air cylinder (4h) is connected with the first sliding base (4e).

4. A device for automatically winding a magnetic tape into the inner wall of a circular casing according to claim 1, characterized in that, The clamping type lifting guide base (6i) is an integral structure, a locking hole (6l) matched with the guide rod (6k) and the lifting base (6g) is arranged on the clamping type lifting guide base (6i), a long hole (6m) passing through the two locking holes (6l) is formed on the clamping type lifting guide base (6i) between the two locking holes (6l), the long hole (6m) penetrates the upper and lower end faces of the clamping type lifting guide base, and matched connecting holes (6n) are arranged on the clamping type lifting guide base (6i) on both sides of the long hole (6m), and a fastening screw passes through the connecting holes (6n) to lock and clamp the guide rod (6k) and the lifting base (6g) in the corresponding locking holes (6l).

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