Printing head translation driving mechanism of 3D printer

Abstract

The invention discloses a 3D printer printing head translation driving mechanism, which belongs to the technical field of 3D printers, and is characterized in that a trapezoidal clamping block, a pressure spring, a fixed clamping plate and a connecting strip are arranged to control a double-output-shaft motor to rotate, so that two groups of first moving seats are moved to one end of a first mounting frame; end plates on the two sides of a second mounting frame are tightly attached to the surfaces of a connecting strip and a mounting block on one side of a first moving seat, so that a positioning clamping strip at the bottom of a fixing clamping plate corresponds to a positioning clamping groove in the top of the connecting strip in position, and the second mounting frame is pushed to move to enable the fixing clamping plate to slide to pass through the bottom of a trapezoidal clamping block; the trapezoidal clamping blocks are pressed downwards to be clamped into the corresponding trapezoidal clamping grooves under the springback effect of the pressing springs, so that the fixing clamping plates are clamped and fixed to the bottom of the mounting block, meanwhile, the positioning clamping strips are inserted into the corresponding positioning clamping grooves, and it is guaranteed that the fixing clamping plates cannot deviate and shake when clamped and fixed between the mounting block and the connecting strips; and meanwhile, the second mounting frame is convenient to disassemble and assemble.

Description

Technical Field

[0001] The invention belongs to the technical field of 3D printers, and in particular relates to a 3D printer print head translation drive mechanism. Background Art

[0002] 3D printer, also known as three-dimensional printer, is a rapid prototyping manufacturing technology equipment, which constructs objects by adding materials layer by layer. These materials can be plastic, metal, resin, etc. 3D printing technology allows complex physical objects to be directly manufactured from digital model files. This process is usually called additive manufacturing. Compared with traditional subtractive manufacturing, 3D printing can greatly reduce material waste and can produce parts with complex internal structures and fine details. In order to enable the 3D printer print head to move in the horizontal direction, the 3D printer print head will be fixed at the bottom of the translation drive mechanism, so that the print head can be accurately moved in the horizontal direction.

[0003] When the existing 3D printer print head translation drive mechanism is combined and installed with two sets of mounting frames that control the moving direction, it is generally necessary to use multiple sets of bolts to connect the two sets of mounting frames. Multiple sets of bolts need to be screwed during assembly and disassembly, which is not fast and convenient enough and will take a long time, affecting the assembly and disassembly speed of the 3D printer and the working efficiency of the 3D printer. Therefore, improvement is needed. Summary of the invention

[0004] In order to overcome the above-mentioned defects, the present invention provides a 3D printer print head translation drive mechanism, which solves the problem that the existing 3D printer print head translation drive mechanism needs to use multiple sets of bolts to connect the two sets of mounting frames when assembling and installing the two sets of mounting frames that control the moving direction, and multiple sets of bolts need to be screwed during assembly and disassembly, which is not fast and convenient enough.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a 3D printer print head translation drive mechanism, comprising a first mounting frame, the number of the first mounting frames is two groups, side panels are fixedly installed at both ends between the two groups of the first mounting frames, and the two groups of first mounting frames are relatively arranged on both sides of the two groups of side panels, a double-output shaft motor is fixedly installed at the central position of one side of the side panel of one group, a second mounting frame is provided between the two groups of the first mounting frames, end panels are fixedly installed on both sides of the second mounting frame, and mounting blocks and connecting strips are provided on the top and bottom of the end panels respectively.

[0006] As a further solution of the present invention: a first movable screw is rotatably installed between the two ends inside the first mounting frame, one end of the first movable screw passes through the first mounting frame and is fixedly installed with a first bevel gear, first limiting slide grooves are symmetrically provided at the top and bottom of the first mounting frame, a first movable seat is provided on the surface of the first movable screw located inside the first mounting frame, a connecting strip and a mounting block are fixedly installed on one side of the first movable seat, and limiting sliders are fixedly installed on the top and bottom of the first movable seat respectively, and the limiting slider corresponds to the position of the first limiting slide groove.

[0007] As a further solution of the present invention: the output ends on both sides of the dual-output shaft motor are respectively fixedly installed with rotating shafts, the surface of the rotating shaft at one end away from the dual-output shaft motor is rotatably connected with a support plate, and the support plate is fixedly connected to the surface of the side plate, and the end of the rotating shaft away from the dual-output shaft motor is fixedly installed with a second bevel gear, and the second bevel gear is meshed with the first bevel gear.

[0008] As a further solution of the present invention: a first rectangular groove is provided inside the second mounting frame, and a second rectangular groove is provided at one end of the second mounting frame which is connected to the first rectangular groove, a movable motor is embedded and fixedly installed inside the second rectangular groove, a second movable screw is fixedly installed at the output end of the movable motor, the second movable screw passes through the second rectangular groove and extends into the first rectangular groove, and two ends of the second movable screw are rotatably connected to two ends of the inner wall of the first rectangular groove, and a second movable seat is provided on the surface of the second movable screw located inside the first rectangular groove.

[0009] As a further solution of the present invention: second limiting slide grooves are symmetrically provided on both sides of the inner wall of the first rectangular groove, and moving rollers are symmetrically fixedly installed on both sides of the second moving seat. The positions of the moving rollers correspond to the second limiting slide grooves, and the moving rollers rotate inside the second limiting slide grooves.

[0010] As a further solution of the present invention: a fixed clamping plate is fixedly installed on the bottom of the end plate away from the second mounting frame, a trapezoidal clamping groove is provided on the top of the fixed clamping plate, and a positioning clamping strip is fixedly installed on the bottom of the fixed clamping plate.

[0011] As a further solution of the present invention: a positioning slot is provided on the top of the connecting strip, and the positioning slot corresponds to the position of the positioning strip and has the same shape.

[0012] As a further solution of the present invention: a mounting groove is provided at the bottom of the mounting block, a trapezoidal clamping block is slidably installed at the bottom of the mounting groove, the trapezoidal clamping block and the trapezoidal clamping block correspond in position and have the same shape as the trapezoidal clamping groove, two groups of clamping columns are fixedly installed on the top of the trapezoidal clamping block located on the inner side of the mounting groove, and a connecting plate is fixedly installed on the top of the two groups of clamping columns through the mounting block, a pulling block is fixedly installed on the top of the connecting plate, a clamping spring is provided on the surface of the clamping column located on the inner side of the mounting groove, and a rubber fixing ring is fixedly installed on the surface of the top of the clamping column.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The cam is then moved to a position adjacent to the first support bracket, whereby the cam is moved to a position adjacent to the first support bracket, and the cam is moved to a position adjacent to the first support bracket, whereby the cam is moved to a position adjacent to the first support bracket, and the cam is moved to a position adjacent to the first support bracket, whereby the cam is moved to a position adjacent to the first support bracket, and the cam is moved to a position adjacent to the first support bracket, and the cam is moved to a position adjacent to the

[0015] 2. In the present invention, a double-output shaft motor, a moving motor, a first moving seat and a second moving seat are set to control the double-output shaft motor to rotate, so that the rotating shafts at both ends of the double-output shaft motor drive the two groups of second bevel gears to rotate synchronously, and the rotation is transmitted to the first moving screw through the first bevel gear, so that the two groups of first moving seats move synchronously on the corresponding first moving screw surfaces, and the two groups of first moving seats drive the second mounting frame to move. At the same time, the moving motor is controlled to control the second moving screw to rotate, and the position of the second moving seat on the surface of the second moving screw is adjusted, thereby facilitating the control of the position of the print head at the bottom of the second moving seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention;

[0017] Figure 2 It is a structural schematic diagram of the first mounting frame and the first moving screw rod of the present invention;

[0018] Figure 3 It is a structural schematic diagram of the side plate and the double-output shaft motor of the present invention;

[0019] Figure 4 It is a schematic cross-sectional structural diagram of the second mounting frame and the second moving screw rod of the present invention;

[0020] Figure 5 It is a structural schematic diagram of the end plate and the fixed clamping plate of the present invention;

[0021] Figure 6 It is a cross-sectional structural schematic diagram of the first movable seat, the mounting block and the connecting strip of the present invention;

[0022] In the figure: 1, first mounting frame; 101, first moving screw; 102, first bevel gear; 103, first limiting slide; 104, first moving seat; 105, limiting slider; 2, side plate; 3, double-output shaft motor; 301, rotating shaft; 302, support plate; 303, second bevel gear; 4, second mounting frame; 401, first rectangular groove; 402, second rectangular groove; 403, second limiting slide; 404, moving Motor; 405, second moving screw; 406, second moving seat; 407, moving roller; 5, end plate; 501, fixed card plate; 502, trapezoidal card slot; 503, positioning card strip; 6, connecting strip; 601, positioning card slot; 7, mounting block; 701, mounting slide; 702, trapezoidal card block; 703, clamping column; 704, clamping spring; 705, rubber fixing ring; 706, connecting plate; 707, pulling block. DETAILED DESCRIPTION

[0023] The technical solution of the present application is further described in detail below in conjunction with specific implementation methods.

[0024] like Figure 1-6 As shown, the present invention provides a technical solution: a 3D printer print head translation drive mechanism, comprising a first mounting frame 1, a first moving screw 101 is rotatably installed between the two ends inside the first mounting frame 1, one end of the first moving screw 101 passes through the first mounting frame 1 and is fixedly installed with a first bevel gear 102, a first moving seat 104 is provided on the surface of the first moving screw 101 located inside the first mounting frame 1, a connecting strip 6 and a mounting block 7 are fixedly installed on one side of the first moving seat 104, by providing the first moving screw 101, when the first moving screw 101 is controlled to rotate, the first moving seat 104 is moved on the surface of the first moving screw 101, so as to facilitate the control of the position of the first moving seat 104 inside the first mounting frame 1;

[0025] The first mounting frame 1 is symmetrically provided with a first limiting groove 103 on the top and bottom, and the first movable seat 104 is fixedly provided with a limiting slider 105 on the top and bottom respectively, and the limiting slider 105 corresponds to the position of the first limiting groove 103. Due to the first limiting groove 103 and the limiting slider 105, when the first movable seat 104 moves inside the first mounting frame 1, the limiting slider 105 moves inside the corresponding first limiting groove 103, thereby ensuring that the first movable seat 104 will not tilt or deflect when it moves inside the first mounting frame 1 with the rotation of the first movable screw 101.

[0026] There are two groups of first mounting frames 1, and side panels 2 are fixedly installed at both ends between the two groups of first mounting frames 1, and the two groups of first mounting frames 1 are relatively arranged on both sides of the two groups of side panels 2. Because the side panels 2 are provided, the two groups of side panels 2 are fixed at both ends between the two groups of first mounting frames 1, so that the two groups of first mounting frames 1 are connected and fixed, ensuring that the two groups of first mounting frames 1 will not be tilted, deflected or misaligned when they are installed in combination;

[0027] A double-output shaft motor 3 is fixedly installed at the central position of one side of a group of side plates 2, and a rotating shaft 301 is fixedly installed at the output ends on both sides of the double-output shaft motor 3. A support plate 302 is rotatably connected to the surface of the rotating shaft 301 away from the double-output shaft motor 3, and the support plate 302 is fixedly connected to the surface of the side plate 2. By providing the support plate 302, when the rotating shaft 301 rotates inside the support plate 302 with the double-output shaft motor 3, the support plate 302 supports the rotating shaft 301 to prevent the rotating shaft 301 from falling when rotating due to its long length;

[0028] A second bevel gear 303 is fixedly installed on one end of the rotating shaft 301 away from the double-output shaft motor 3, and the second bevel gear 303 is meshed with the first bevel gear 102. Due to the provision of the second bevel gear 303, the double-output shaft motor 3 is controlled to rotate, and the two groups of rotating shafts 301 are controlled to drive the corresponding second bevel gears 303 to rotate synchronously, thereby controlling the two groups of first bevel gears 102 to drive the corresponding first moving screws 101 to rotate synchronously.

[0029] A second mounting frame 4 is provided between the two groups of first mounting frames 1 and the two groups of side panels 2, a first rectangular groove 401 is provided inside the second mounting frame 4, a second rectangular groove 402 is provided at one end of the second mounting frame 4 located at the first rectangular groove 401, a moving motor 404 is embedded and fixedly installed inside the second rectangular groove 402, a second moving screw 405 is fixedly installed at the output end of the moving motor 404, the second moving screw 405 passes through the second rectangular groove 402 and extends to the inside of the first rectangular groove 401, and the two ends of the second moving screw 405 are rotatably connected to the two ends of the inner wall of the first rectangular groove 401, a second moving seat 406 is provided on the surface of the second moving screw 405 located inside the first rectangular groove 401, and by providing the moving motor 404 and the second moving screw 405, the moving motor 404 is controlled to rotate to drive the second moving screw 405 to rotate, so that the second moving seat 406 moves on the surface of the second moving screw 405.

[0030] Second limiting grooves 403 are symmetrically provided on both sides of the inner wall of the first rectangular groove 401, and moving rollers 407 are symmetrically fixedly installed on both sides of the second movable seat 406. The moving rollers 407 correspond to the positions of the second limiting grooves 403, and the moving rollers 407 rotate inside the second limiting grooves 403. Because the second limiting grooves 403 and the moving rollers 407 are provided, when the second movable seat 406 moves inside the second rectangular groove 402 with the rotation of the second moving screw 405, the moving rollers 407 are driven to roll inside the corresponding second limiting grooves 403, thereby restricting the second movable seat 406, and preventing the second movable seat 406 from tilting and deflecting when it moves inside the second rectangular groove 402 with the rotation of the second moving screw 405.

[0031] The second mounting frame 4 is fixedly mounted with end plates 5 on both sides, and a fixed card plate 501 is fixedly mounted on the bottom of the end plate 5 away from the second mounting frame 4. A trapezoidal card slot 502 is provided on the top of the fixed card plate 501, and a positioning card strip 503 is fixedly mounted on the bottom of the fixed card plate 501. The end plate 5 is provided with a mounting block 7 and a connecting bar 6 on the top and bottom, respectively. A positioning card slot 601 is provided on the top of the connecting bar 6, and the positioning card slot 601 corresponds to the position of the positioning card strip 503 and has the same shape. By providing the positioning card strip 503 and the positioning card slot 601, when the end plate 5 is pressed against one side of the connecting bar 6 and the mounting block 7, the fixed card plate 501 is pressed against the top of the connecting bar 6 until the positioning card strip 503 is correspondingly inserted into the positioning card slot 601, ensuring that there is no positional displacement when the second mounting frame 4 is clamped and fixed between the two sets of first movable seats 104.

[0032] The bottom of the mounting block 7 is provided with a mounting slot 701, and a trapezoidal clamping block 702 is slidably installed at the bottom of the mounting slot 701. The trapezoidal clamping block 702 corresponds to the position of the trapezoidal clamping slot 502 and has the same shape. Since the trapezoidal clamping slot 502 and the trapezoidal clamping block 702 are provided, when the trapezoidal clamping block 702 is clamped into the corresponding trapezoidal clamping slot 502, the fixed clamping plate 501 is clamped and fixed between the mounting block 7 and the connecting bar 6;

[0033] Two sets of clamping columns 703 are fixedly installed on the top of the trapezoidal block 702 located inside the installation slot 701. The surface of the clamping column 703 located inside the installation slot 701 is provided with a clamping spring 704. By providing the clamping spring 704, the trapezoidal block 702 is pressed down and ejected from the installation slot 701 under the rebound effect of the clamping spring 704, ensuring that the trapezoidal block 702 can be correspondingly inserted into the trapezoidal slot 502.

[0034] The top ends of the two groups of clamping columns 703 pass through the mounting block 7 and are fixedly installed with a connecting plate 706. The top of the connecting plate 706 is fixedly installed with a pulling block 707. The surface of the top of the clamping column 703 is fixedly installed with a rubber fixing ring 705. Because of the rubber fixing ring 705, when the trapezoidal clamping block 702 is pressed down and ejected from the inside of the mounting slide groove 701, the trapezoidal clamping block 702 drives the clamping column 703 to move downward, so that the rubber fixing ring 705 is stuck on the top of the mounting block 7. The rubber fixing ring 705 is squeezed and deformed at the top of the mounting block 7, thereby clamping and fixing the clamping column 703, ensuring that the clamping column 703 will not slide at will on the top of the mounting block 7, and the trapezoidal clamping block 702 will not be separated from the inside of the trapezoidal clamping groove 502 at will.

[0035] The working principle of the present invention is:

[0036] When the two groups of first moving seats 104 move to one end corresponding to the first mounting frame 1, the second mounting frame 4 is placed between the two groups of first moving seats 104, so that the fixed card plates 501 at both ends of the second mounting frame 4 correspond to the positions between the connecting strip 6 and the mounting block 7 on the surface of the first moving seat 104, and the second mounting frame 4 is pushed to drive the fixed card plate 501 to be inserted between the corresponding connecting strip 6 and the mounting block 7, so that the positioning card strip 503 at the bottom of the fixed card plate 501 is inserted into the corresponding positioning card slot 601 at the top of the connecting strip 6, and at the same time, the top of the fixed card plate 501 slides past the bottom of the trapezoidal card block 702, and the fixed card plate 501 moves the trapezoidal card block 702 to the fixed card plate 501. The clamping block 702 is lifted up and inserted into the installation slide groove 701, so that the pressing spring 704 is squeezed and deformed at the top of the trapezoidal clamping block 702. When the trapezoidal clamping groove 502 at the top of the fixed clamping plate 501 corresponds to the position of the trapezoidal clamping block 702, the pressing spring 704 rebounds to push the trapezoidal clamping block 702 out of the installation slide groove 701 and insert it into the trapezoidal clamping groove 502. At the same time, the trapezoidal clamping block 702 drives the pressing column 703 to move downward so that the rubber fixing ring 705 is stuck on the top of the installation block 7, so that the fixed clamping plate 501 is clamped and fixed between the connecting strip 6 and the installation block 7, so that the second installation frame 4 is clamped and fixed between the two sets of opposite first movable seats 104;

[0037] The double-output shaft motor 3 is controlled to rotate, and the rotation of the double-output shaft motor 3 is transmitted to the two groups of first bevel gears 102 through the transmission of the two groups of rotating shafts 301 and the second bevel gear 303. The two groups of first bevel gears 102 are controlled to drive the corresponding first moving screws 101 to rotate synchronously, so that the two groups of first moving seats 104 drive the second mounting frame 4 to move between the two corresponding first mounting frames 1. During the process of the first moving seat 104 driving the second mounting frame 4 to move, the moving motor 404 is controlled to drive the second moving screw 405 to rotate at the same time, so that the second moving seat 406 moves on the surface of the second moving screw 405, until the second moving seat 406 is moved to the top of the specified position of the printer processing platform, so that the print head can perform printing processing on the top of the printer processing platform.

[0038] In the description of the present invention, it is necessary to understand that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0040] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In the present invention, unless otherwise clearly specified and limited, the first feature "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one scheme", "some schemes", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the scheme or example are included in at least one scheme or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same scheme or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more schemes or examples in a suitable manner.

Claims

1. A 3D printer print head translation drive mechanism, comprising a first mounting frame (1), characterized in that: The number of the first mounting frames (1) is two groups, and side panels (2) are fixedly mounted at both ends between the two groups of the first mounting frames (1), and the two groups of the first mounting frames (1) are arranged on both sides of the two groups of the side panels (2) relatively, and a double-output shaft motor (3) is fixedly mounted at the central position of one side of the side panel (2) of one group, and a second mounting frame (4) is arranged between the two groups of the first mounting frames (1) and between the two groups of the side panels (2), and end panels (5) are fixedly mounted on both sides of the second mounting frame (4), and a mounting block (7) and a connecting strip (6) are respectively arranged on the top and bottom of the end panel (5).

2. A 3D printer print head translation drive mechanism according to claim 1, characterized in that: A first movable screw rod (101) is rotatably mounted between the two ends inside the first mounting frame (1); one end of the first movable screw rod (101) passes through the first mounting frame (1) and is fixedly mounted with a first bevel gear (102); first limiting sliding grooves (103) are symmetrically arranged at the top and bottom of the first mounting frame (1); a first movable seat (104) is arranged on the surface of the first movable screw rod (101) located inside the first mounting frame (1); a connecting strip (6) and a mounting block (7) are fixedly mounted on one side of the first movable seat (104); limiting sliding blocks (105) are fixedly mounted on the top and bottom of the first movable seat (104), respectively, and the positions of the limiting sliding blocks (105) and the first limiting sliding grooves (103) correspond to each other.

3. A 3D printer print head translation drive mechanism according to claim 2, characterized in that: The output ends on both sides of the dual-output shaft motor (3) are respectively fixedly mounted with rotating shafts (301); the surface of one end of the rotating shaft (301) away from the dual-output shaft motor (3) is rotatably connected to a support plate (302); the support plate (302) is fixedly connected to the surface of the side plate (2); the end of the rotating shaft (301) away from the dual-output shaft motor (3) is fixedly mounted with a second bevel gear (303); and the second bevel gear (303) is meshed with the first bevel gear (102).

4. A 3D printer print head translation drive mechanism according to claim 1, characterized in that: A first rectangular groove (401) is provided inside the second mounting frame (4); a second rectangular groove (402) is provided at one end of the second mounting frame (4) located at the first rectangular groove (401); a moving motor (404) is fixedly installed inside the second rectangular groove (402); a second moving screw (405) is fixedly installed at the output end of the moving motor (404); the second moving screw (405) passes through the second rectangular groove (402) and extends into the first rectangular groove (401); two ends of the second moving screw (405) are rotatably connected to two ends of the inner wall of the first rectangular groove (401); a second moving seat (406) is provided on the surface of the second moving screw (405) located inside the first rectangular groove (401).

5. A 3D printer print head translation drive mechanism according to claim 4, characterized in that: The second limiting sliding grooves (403) are symmetrically arranged on both sides of the inner wall of the first rectangular groove (401), and the second movable seat (406) is symmetrically fixedly installed with movable rollers (407) on both sides. The positions of the movable rollers (407) correspond to those of the second limiting sliding grooves (403), and the movable rollers (407) rotate inside the second limiting sliding grooves (403).

6. A 3D printer print head translation drive mechanism according to claim 1, characterized in that: A fixed clamping plate (501) is fixedly mounted on the bottom of the end plate (5) away from the second mounting frame (4), a trapezoidal clamping groove (502) is provided on the top of the fixed clamping plate (501), and a positioning clamping strip (503) is fixedly mounted on the bottom of the fixed clamping plate (501).

7. A 3D printer print head translation drive mechanism according to claim 6, characterized in that: The top of the connecting strip (6) is provided with a positioning slot (601), and the positioning slot (601) corresponds to the position of the positioning strip (503) and has the same shape.

8. A 3D printer print head translation drive mechanism according to claim 6, characterized in that: The bottom of the mounting block (7) is provided with a mounting groove (701), and a trapezoidal clamping block (702) is slidably installed at the bottom of the mounting groove (701), and the position of the trapezoidal clamping block (702) corresponds to that of the trapezoidal clamping groove (502) and the shape is the same, and two groups of clamping columns (703) are fixedly installed on the top of the trapezoidal clamping block (702) located inside the mounting groove (701), and the top ends of the two groups of clamping columns (703) pass through the mounting block (7) and are fixedly installed with a connecting plate (706), and a pulling block (707) is fixedly installed on the top of the connecting plate (706), and a clamping spring (704) is provided on the surface of the clamping column (703) located inside the mounting groove (701), and a rubber fixing ring (705) is fixedly installed on the surface of the top of the clamping column (703).

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