Inner hole machining equipment for quartz ceramic roller

Abstract

The invention provides quartz ceramic roller inner hole machining equipment which comprises a rack assembly, a proofreading assembly is arranged on one side of the rack assembly, the proofreading assembly is provided with a proofreading device, and the proofreading device is used for proofreading the coaxiality of a ceramic roller; a positioning assembly is arranged at one end of the rack assembly and provided with an ejector rod, and the ejector rod is used for fixing the tail end of a ceramic roller. A middle supporting assembly is arranged in the middle of the rack assembly and provided with an arc-shaped top plate, and the arc-shaped top plate corresponds to the outer wall of the ceramic roller. Clamping assemblies are further arranged at the two ends of the rack assembly, through holes are formed in the clamping assemblies, the through holes penetrate through the clamping assemblies, and the through holes are used for avoiding the ejector rods and the drilling tools. The front end of the corrector is continuously in contact with the outer surface of the ceramic roller, the drilling operation state of the ceramic roller is monitored in real time, it is ensured that the position of the ceramic roller is stable in the drilling process, and therefore the drilling quality is improved.

Description

Technical Field

[0001] The invention relates to the field of quartz ceramic roller production, in particular to an inner hole processing device for a quartz ceramic roller. Background Art

[0002] The quartz ceramic roller is a composite component composed of a ceramic body, bearing, shaft and plastic labyrinth seal ring. The ceramic body is mainly made of fused quartz ceramic. Fused quartz ceramic is made of amorphous / glassy silicon oxide, which is crushed, ball-milled, cast in a mold, and then sintered at high temperature.

[0003] Patent CN117047918A introduces a ceramic roller blank drilling machine, which includes a bracket, on which a working platform is fixedly installed, a U-shaped adjustment frame, a drilling control box and a roller drilling mechanism. The roller drilling mechanism includes a drilling drive assembly, a cleaning assembly, drill bit 1, drill bit 2 and an air jet slot. By pre-drilling small holes, it can further avoid cracking or damage caused by direct drilling when it is necessary to drill larger holes.

[0004] Although the above scheme can prevent the ceramic roller blank from cracking during the drilling process, the deviation of clamping accuracy when the ceramic roller is clamped will cause poor drilling accuracy, thereby affecting the processing accuracy. Summary of the invention

[0005] In order to overcome some of the problems mentioned in the above background, the present invention provides an inner hole processing device for a quartz ceramic roller.

[0006] The technical solution adopted by the present invention is as follows: an inner hole processing device for a quartz ceramic roller, comprising a frame assembly, a proofreading assembly is provided on one side of the frame assembly, the proofreading assembly is provided with a proofreader, and the proofreader is used to proofread the coaxiality of the ceramic roller; A positioning assembly is provided at one end of the frame assembly, and the positioning assembly is provided with a push rod, and the push rod is used to fix the tail end of the ceramic roller; A middle support assembly is provided in the middle of the frame assembly, and the middle support assembly is provided with an arc-shaped top plate, and the arc-shaped plate is arranged corresponding to the outer wall of the ceramic roller; Clamping assemblies are also provided at both ends of the frame assembly. The clamping assemblies are provided with through holes. The two through holes are arranged correspondingly to avoid the push rod and the drilling tool.

[0007] Further, the frame assembly includes a shell, a load-bearing frame and a first connecting mechanism, the shell is arranged at one end of the load-bearing frame, the other end of the load-bearing frame is provided with an end plate, the top rod is connected to the end plate, the first connecting mechanism is axially connected to the shell, one of the clamping assemblies is fixedly connected to the first connecting mechanism, and the middle support assembly is slidably connected to the load-bearing frame; The first connecting mechanism comprises a first fixing plate and a plurality of first damping members, the plurality of first damping members are arranged in a circumferential array along the first fixing plate, two ends of the first damping member are respectively fixedly connected to the first fixing plate and the clamping assembly, and a shock absorbing spring is arranged on the outer side of the first damping member; The frame assembly is also provided with a driving motor, the driving motor is connected to the drilling tool, the driving motor is fixedly connected to the shell, and the driving motor drives the drilling tool to rotate.

[0008] Furthermore, the supporting frame includes a supporting plate, two guide rods, a support block and a base plate, the support block is arranged between the supporting plate and the base plate, the two guide rods are respectively arranged on both sides of the support block, the supporting plate is provided with two sliding grooves, and the two sliding grooves are arranged one-to-one with the two guide rods.

[0009] Furthermore, the proofreading assembly also includes a first slider and a guide rail, the first slider is slidably connected to the guide rail, the first slider is fixedly connected to the proofreader, one end of the guide rail is provided with a connecting clip, the connecting clip is fixedly connected to the end plate, and the other end of the guide rail is provided with a connecting plate, and the connecting plate is fixedly connected to the shell.

[0010] Furthermore, the positioning assembly further comprises an adjusting wheel, a movable plate, a second connecting mechanism and a second slider, the second connecting mechanism is axially connected to the movable plate, another clamp is fixedly connected to the second connecting mechanism, the second slider is arranged at the bottom of the movable plate, and the second slider is slidably connected to the guide rod; The end of the push rod is fixedly connected to the adjusting wheel, the front end of the push rod passes through the moving plate and the clamping assembly, the push rod is provided with a threaded portion, and the threaded portion of the push rod is connected to the end plate through a thread; The second connecting mechanism includes a second fixed plate and a plurality of second damping members, the plurality of second damping members are arranged in a circumferential array along the second fixed plate, the two ends of the second damping member are respectively fixedly connected to the second fixed plate and the clamping assembly, and a shock-absorbing spring is provided on the outer side of the second damping member.

[0011] Furthermore, the clamping assembly also includes a plurality of arc-shaped clamping plates and through holes, wherein the through holes penetrate the clamping assembly, and the plurality of arc-shaped clamping plates are arranged in a circumferential array along the through holes, and the arc-shaped clamping plates are arranged corresponding to the outer side of the ceramic roller.

[0012] Furthermore, the middle support assembly also includes a telescopic rod, a connecting plate and a third slider, the two ends of the telescopic rod are connected to the arc-shaped top plate and the connecting plate, the third slider is arranged at the bottom of the connecting plate, the third slider is slidably connected to the guide rod, and the telescopic rod is used to adjust the height of the arc-shaped top plate.

[0013] Compared with the prior art, the beneficial effects of the present invention are: The two ends of the ceramic roller are clamped by the clamping components at both ends, and the arc-shaped top plate is fixed from the bottom to provide a stable support for the ceramic roller; at the same time, the tail of the ceramic roller is supported by the top rod to effectively prevent the position of the ceramic roller from shifting during the drilling operation. The proofreader can detect the state of the ceramic roller to be drilled and the state of drilling, which significantly improves the accuracy of the drilling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of an inner hole processing device (including a ceramic roller) of a quartz ceramic roller according to an embodiment of the present invention; Figure 2 It is a schematic diagram of the inner hole processing equipment of the quartz ceramic roller (excluding the ceramic roller) according to an embodiment of the present invention; Figure 3 It is a front view schematic diagram of the inner hole processing equipment of the quartz ceramic roller (excluding the ceramic roller) according to an embodiment of the present invention; Figure 4 for Figure 1 Schematic diagram of the positioning component; Figure 5 for Figure 1 Schematic diagram of the middle support assembly; Figure 6 for Figure 1 A schematic diagram of a top view of a mid-frame assembly; Figure 7 for Figure 6 A schematic cross-sectional view along the AA section line; Figure 8 for Figure 1 Schematic diagram of the proofreading components; Fig. 9 for Figure 1 Schematic diagram of the clamping assembly.

[0015] In the figure: 1. Frame assembly; 11. Shell; 12. Drive motor; 13. End plate; 14. Carrier; 141. Carrier plate; 142. Guide rod; 143. Support block; 144. Bottom plate; 145. Slide; 15. First connecting mechanism; 151. First fixed plate; 152. First damping member; 16. Drilling tool; 2. Proofreading assembly; 21. First slider; 22. Guide rail; 23. Connecting clamp; 24. Proofreader; 25. Connecting plate; 3. Clamping assembly; 31. Arc clamping plate; 32. Through hole; 4. Positioning assembly; 41. Adjusting wheel; 42. Push rod; 43. Moving plate; 44. Second connecting mechanism; 441. Second fixed plate; 442. Second damping member; 45. Second slider; 5. Middle support assembly; 51. Arc top plate; 52. Telescopic rod; 53. Connecting plate; 54. Third slider. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0017] In the description of the present invention, it should be understood that terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside” and “outside” indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0018] like Figure 1-Figure 9 As shown, in some embodiments, a quartz ceramic roller inner hole processing device includes a frame assembly 1, a proofreading assembly 2, a clamping assembly 3, a positioning assembly 4 and a middle support assembly 5. The proofreading assembly 2 is installed on one side of the frame assembly 1, and a proofreader 24 is provided therein. The proofreader 24 is used to respectively detect the coaxiality of various parts of the ceramic roller, and the position of the ceramic roller is adjusted by the proofreader 24 to ensure the processing accuracy when processing the inner holes at both ends.

[0019] In particular, the positioning assembly 4 is mounted at one end of the frame assembly 1 and is provided with a push rod 42 therein. The function of the push rod 42 is to hold the tail end of the ceramic roller against the position of the other end of the ceramic roller to prevent the position of the other end of the ceramic roller from changing during the drilling process, thereby ensuring the accuracy of the processing.

[0020] In order to further improve the stability and accuracy of the processing, the middle support assembly 5 is installed in the middle of the frame assembly 1, and an arc-shaped top plate 51 is provided inside the middle support assembly 5. The shape of the arc-shaped top plate 51 is completely consistent with the curvature of the outer wall of the ceramic roller, so that it can fit closely with the outer wall of the ceramic roller, thereby providing solid support for the bottom of the ceramic roller and ensuring that the ceramic roller remains stable during the processing.

[0021] In addition, a clamping assembly 3 is provided at both ends of the frame assembly 1. A through hole 32 is provided inside the clamping assembly 3, and the through hole 32 runs through the clamping assembly 3. The through hole 32 is used to avoid the push rod 42 and the drilling tool 16, so that the push rod 42 and the drilling tool 16 can pass smoothly during the processing, thereby ensuring the smooth progress of the processing. When using the drilling tool 16 for drilling operations, a nozzle must be connected to deliver lubricant to the drilling area to achieve cooling and lubrication effects.

[0022] It should be noted that when operating the ceramic roller to be drilled, its two ends are clamped and fixed by the clamping assembly 3. Then, the top rod 42 passes through the clamping assembly 3 and abuts against the rear end of the ceramic roller, while the front end is drilled by the drilling tool 16. At the same time, the middle part of the ceramic roller is supported by the arc-shaped top plate 51 to ensure its stability.

[0023] Before the drilling operation begins, the proofreader 24 will detect the front, middle and tail of the ceramic roller. The specific operation is: the front end of the proofreader 24 contacts the outer surface of the ceramic roller, and the ceramic roller is rotated by rotating the two clamping components 3. The data collected by the proofreader 24 will be transmitted to the external controller. According to the measurement results of the proofreader 24, the positions of the clamping components 3 at both ends and the arc-shaped top plate 51 in the center are adjusted accordingly to ensure that the ceramic roller is accurately positioned, thereby ensuring the accuracy of the drilling process.

[0024] During the drilling operation, the front end of the proofreader 24 continuously keeps in contact with the outer surface of the ceramic roller, monitoring the drilling operation status of the ceramic roller in real time to ensure its stable position during the drilling process, thereby improving the quality of drilling.

[0025] The two ends of the ceramic roller are clamped by the clamping assemblies 3 at both ends, and the arc-shaped top plate 51 is fixed from the bottom to provide a stable support for the ceramic roller. At the same time, the tail of the ceramic roller is supported by the top rod 42, which effectively prevents the position of the ceramic roller from shifting during the drilling operation. The state of the ceramic roller to be drilled and the state of drilling are detected separately by the proofreader 24, which significantly improves the accuracy of the drilling process.

[0026] like Figure 2 , Figure 3 , Figure 6 and Figure 7As shown, in some embodiments, the frame assembly 1 includes a housing 11, a carrier 14 and a first connecting mechanism 15. The housing 11 is disposed at one end of the carrier 14, and an end plate 13 is disposed at the other end of the carrier 14, so as to form an integral structure to provide a support basis for the inner hole processing of the ceramic roller. In particular, the top rod 42 is connected to the end plate 13, and the protruding end of the top rod 42 passes through the end plate 13 and abuts against the tail of the ceramic roller.

[0027] The first connection mechanism 15 is axially connected to the housing 11. The first connection mechanism 15 can rotate, and a stopper is provided in the first connection mechanism 15, and the stopper is connected to the housing 11. One of the clamping assemblies 3 is fixedly connected to the first connection mechanism 15. Specifically, when the first connection mechanism 15 needs to rotate, the stopper is removed so that the first connection mechanism 15 can drive the clamping assembly 3 to rotate. When drilling, the stopper is connected to the housing 11 to prevent the first connection mechanism 15 from rotating.

[0028] In particular, the middle support assembly 5 is slidably connected to the support frame 14, and its position in the support frame 14 can be adjusted according to the length of the ceramic roller to provide effective supporting force.

[0029] Further, the first connection mechanism 15 includes a first fixing plate 151 and a plurality of first damping members 152. The first damping members 152 are arranged in a circumferential array along the first fixing plate 151. Both ends of the first damping member 152 are fixedly connected to the first fixing plate 151 and the clamping assembly 3 respectively to ensure the stability of the connection.

[0030] In addition, shock-absorbing springs are provided on the outer side of the first damping member 152, and these shock-absorbing springs can effectively absorb and reduce the vibration generated during drilling, thereby improving the processing accuracy. The frame assembly 1 is also provided with a drive motor 12, and the drive motor 12 is connected to the drilling tool 16 to ensure that the drilling tool 16 can work efficiently and stably. The drive motor 12 is fixedly connected to the housing 11, so that the stability of the drive motor 12 during operation can be ensured to avoid processing errors caused by vibration or displacement. The drive motor 12 drives the drilling tool 16 to rotate, so that the inner hole processing equipment can efficiently complete the inner hole processing task of the quartz ceramic roller.

[0031] Further, in some embodiments, the carrier 14 includes a carrier plate 141, two guide rods 142, a support block 143 and a bottom plate 144. Specifically, the support block 143 is disposed between the carrier plate 141 and the bottom plate 144, and plays a role in supporting and stabilizing the carrier plate 141. The two guide rods 142 are respectively disposed on both sides of the support block 143, and provide a guiding function for the movement of the middle support assembly 5 and the positioning assembly 4. In particular, two slide grooves 145 are further disposed on the carrier plate 141, and the two slide grooves 145 are disposed one-to-one with the two guide rods 142, so as to further ensure the accuracy of the movement of the middle support assembly 5 and the positioning assembly 4.

[0032] The bottom plate 144 serves as the base of the support frame 14 and provides stability and support for the entire device.

[0033] like Figure 2 and Figure 8 As shown, in some embodiments, the proofreading assembly 2 further includes a first slider 21 and a guide rail 22. Specifically, the first slider 21 is slidably connected to the guide rail 22, so that the first slider 21 can move smoothly on the guide rail 22. In addition, the first slider 21 is fixedly connected to the proofreader 24, ensuring the stability and accuracy of the proofreader 24 during use.

[0034] In order to further enhance the stability and reliability of the device, a connecting clip 23 is provided at one end of the guide rail 22, and the connecting clip 23 is fixedly connected to the end plate 13, and a connecting plate 25 is provided at the other end of the guide rail 22, and the guide rail 22 is fixedly connected to the housing 11 through the connecting plate 25. Such a design forms a stable connection between the guide rail 22 and the rack assembly 1, thereby ensuring the stability and reliability of the entire proofreading assembly 2.

[0035] like Figure 2 and Figure 4 As shown, in some embodiments, the positioning assembly 4 further includes an adjusting wheel 41, a moving plate 43, a second connecting mechanism 44 and a second slider 45. Specifically, the second connecting mechanism 44 and the moving plate 43 are also connected by a shaft connection, so that the second connecting mechanism 44 can rotate. Another clamping assembly 3 is fixedly connected to the second connecting mechanism 44, that is, the second connecting mechanism 44 can drive the clamping assembly 3 to rotate.

[0036] In addition, a second slider 45 is disposed at the bottom of the movable plate 43 . Two second sliders 45 are provided. The two second sliders 45 are respectively slidably connected to the guide rods 142 , and the movable plate 43 is guided to move precisely through the guide rods 142 .

[0037] Furthermore, the end of the push rod 42 is fixedly connected to the adjusting wheel 41, and the front end of the push rod 42 passes through the movable plate 43 and the clamping assembly 3. A threaded portion is provided on the push rod 42, and the threaded portion is connected to the end plate 13 by a thread. The second connecting mechanism 44 has the same structure as the first connecting mechanism 15, and includes a second fixed plate 441 and a plurality of second damping members 442, and these second damping members 442 are arranged in a circumferential array along the second fixed plate 441. Specifically, the two ends of the second damping member 442 are fixedly connected to the second fixed plate 441 and the clamping assembly 3, respectively. In addition, the outer side of the second damping member 442 is also provided with a shock-absorbing spring, which can effectively absorb and reduce the vibration generated during drilling, thereby improving the processing accuracy.

[0038] like Fig. 9 As shown, in some embodiments, the clamping assembly 3 further includes a plurality of arc-shaped clamping plates 31. Specifically, these arc-shaped clamping plates 31 are arranged in a circumferential array along the through hole 32 to form a ring structure. In particular, these arc-shaped clamping plates 31 are arranged corresponding to the outer side of the ceramic roller, ensuring that the clamping assembly 3 can closely fit the outer surface of the ceramic roller. In this way, the clamping assembly 3 can effectively fix and support the ceramic roller, thereby maintaining its stability and precision during the processing.

[0039] like Figure 5 As shown, in some embodiments, the middle support assembly 5 also includes a telescopic rod 52, a connecting plate 53 and a third slider 54. Specifically, the two ends of the telescopic rod 52 are respectively connected to the arc-shaped top plate 51 and the connecting plate 53, so that the telescopic rod 52 can adjust the height of the arc-shaped top plate 51, so as to effectively support the bottom of the ceramic roller. In addition, the third slider 54 is arranged at the bottom of the connecting plate 53, and two third sliders 54 are also arranged. These two third sliders 54 are respectively slidably connected to the two guide rods 142, so as to ensure that the relative movement between the third slider 54 and the carrier 14 is smoother. Through this structural design, the middle support assembly 5 can flexibly adjust and support the quartz ceramic roller to meet the precision requirements of inner hole processing.

[0040] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A quartz ceramic roller inner hole processing device, comprising a frame assembly (1), characterized in that: A calibration component (2) is provided on one side of the frame component (1), and the calibration component (2) is provided with a calibrator (24), and the calibrator (24) is used to calibrate the coaxiality of the ceramic roller; A positioning assembly (4) is provided at one end of the frame assembly (1), and the positioning assembly (4) is provided with a push rod (42), and the push rod (42) is used to fix the tail end of the ceramic roller; A middle support assembly (5) is provided in the middle of the frame assembly (1), and the middle support assembly (5) is provided with an arc-shaped top plate (51), and the arc-shaped plate is arranged corresponding to the outer wall of the ceramic roller; The two ends of the frame assembly (1) are also provided with clamping assemblies (3), the clamping assembly (3) being provided with a through hole (32), the through hole (32) penetrating the clamping assembly (3), and the two through holes (32) being arranged correspondingly to avoid the push rod (42) and the drilling tool (16).

2. The inner hole processing equipment of the quartz ceramic roller according to claim 1, characterized in that: The frame assembly (1) comprises a shell (11), a carrier frame (14) and a first connecting mechanism (15); the shell (11) is arranged at one end of the carrier frame (14); the other end of the carrier frame (14) is provided with an end plate (13); the top rod (42) is connected to the end plate (13); the first connecting mechanism (15) is axially connected to the shell (11); one of the clamping assemblies (3) is fixedly connected to the first connecting mechanism (15); and the middle support assembly (5) is slidably connected to the carrier frame (14); The first connecting mechanism (15) comprises a first fixing plate (151) and a plurality of first damping members (152), the plurality of first damping members (152) being arranged in a circumferential array along the first fixing plate (151), the two ends of the first damping member (152) being respectively fixedly connected to the first fixing plate (151) and the clamping assembly (3), and a shock absorbing spring being arranged on the outer side of the first damping member (152); The frame assembly (1) is further provided with a drive motor (12), the drive motor (12) being connected to the drilling tool (16), the drive motor (12) being fixedly connected to the housing (11), and the drive motor (12) driving the drilling tool (16) to rotate.

3. The inner hole processing equipment of the quartz ceramic roller according to claim 2, characterized in that: The carrier frame (14) comprises a carrier plate (141), two guide rods (142), a support block (143) and a bottom plate (144); the support block (143) is arranged between the carrier plate (141) and the bottom plate (144); the two guide rods (142) are respectively arranged on both sides of the support block (143); the carrier plate (141) is provided with two slide grooves (145); the two slide grooves (145) are arranged in a one-to-one correspondence with the two guide rods (142).

4. The inner hole processing equipment of the quartz ceramic roller according to claim 2, characterized in that: The proofreading assembly (2) further comprises a first slider (21) and a guide rail (22), wherein the first slider (21) is slidably connected to the guide rail (22), the first slider (21) is fixedly connected to the proofreader (24), one end of the guide rail (22) is provided with a connecting clip (23), the connecting clip (23) is fixedly connected to the end plate (13), and the other end of the guide rail (22) is provided with a connecting plate (25), and the connecting plate (25) is fixedly connected to the housing (11).

5. The inner hole processing equipment of the quartz ceramic roller according to claim 3, characterized in that: The positioning assembly (4) further comprises an adjusting wheel (41), a movable plate (43), a second connecting mechanism (44) and a second sliding block (45); the second connecting mechanism (44) is axially connected to the movable plate (43); another clamping assembly (3) is fixedly connected to the second connecting mechanism (44); the second sliding block (45) is arranged at the bottom of the movable plate (43); and the second sliding block (45) is slidably connected to the guide rod (142); The end of the push rod (42) is fixedly connected to the adjusting wheel (41), the front end of the push rod (42) passes through the movable plate (43) and the clamping assembly (3), the push rod (42) is provided with a threaded portion, and the threaded portion of the push rod (42) is connected to the end plate (13) by means of a thread; The second connecting mechanism (44) comprises a second fixing plate (441) and a plurality of second damping members (442), wherein the plurality of second damping members (442) are arranged in a circumferential array along the second fixing plate (441), the two ends of the second damping member (442) are respectively fixedly connected to the second fixing plate (441) and the clamping assembly (3), and a shock absorbing spring is provided on the outer side of the second damping member (442).

6. The inner hole processing equipment of the quartz ceramic roller according to claim 5, characterized in that: The clamping assembly (3) further comprises a plurality of arc-shaped clamping plates (31) and through holes (32), wherein the through holes (32) penetrate the clamping assembly (3), and the plurality of arc-shaped clamping plates (31) are arranged in a circumferential array along the through holes (32), and the arc-shaped clamping plates (31) are arranged corresponding to the outer sides of the ceramic rollers.

7. The inner hole processing equipment of the quartz ceramic roller according to claim 3, characterized in that: The middle support assembly (5) further comprises a telescopic rod (52), a connecting plate (53) and a third sliding block (54); the two ends of the telescopic rod (52) are connected to the arc-shaped top plate (51) and the connecting plate (53); the third sliding block (54) is arranged at the bottom of the connecting plate (53); the third sliding block (54) is slidably connected to the guide rod (142); and the telescopic rod (52) is used to adjust the height of the arc-shaped top plate (51).

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