CN113765332B

CN113765332B - Motor structure

Info

Publication number: CN113765332B
Application number: CN202111126325.0A
Authority: CN
Inventors: 张超
Original assignee: Wuxi Xinjun Motor Co ltd
Current assignee: Wuxi Xinjun Motor Co ltd
Priority date: 2021-09-26
Filing date: 2021-09-26
Publication date: 2022-11-25
Anticipated expiration: 2041-09-26
Also published as: CN113765332A

Abstract

The invention relates to a motor structure, which comprises an upper shell and a lower shell, wherein the upper shell and the lower shell are detachably arranged, and are fixedly connected through a fixing plate; according to the invention, the structure of the existing motor shell is optimized, and the optimized motor shell is converted into a detachable structure from an integrated structure, so that when the motor is damaged and needs to be maintained, the effects of high efficiency and light operation can be achieved through convenient disassembly and assembly.

Description

Motor structure

Technical Field

The invention relates to the technical field of motors, in particular to a motor structure.

Background

With the pace of social and economic development accelerating, all trades change day by day. Various electrically powered devices have been developed and used in a variety of fields. In which motor structures have been widely used in many fields as key devices. The existing motor shell is of an integrated structure and is fixed in a welding mode during fixing, but the motor shell is inconvenient to disassemble and assemble when the motor is damaged and needs to be maintained in the mode.

Disclosure of Invention

(1) Technical problem to be solved

The present invention is directed to overcome the disadvantages of the prior art, and to provide a motor structure to solve the above problems.

(2) Technical scheme

In order to realize the purpose of the invention, the technical scheme adopted by the invention is as follows:

the motor structure comprises an upper shell and a lower shell, wherein the upper shell and the lower shell are detachably arranged, and the upper shell and the lower shell are fixedly connected through a fixing plate.

Furthermore, the fixing mechanism comprises a fixing plate and a fixing groove, the fixing plate is fixedly arranged on the outer side wall of the lower casing, a first fixing hole is formed in the fixing plate, the fixing groove is fixedly arranged on the outer side wall of the upper casing, a second fixing hole is formed in the fixing groove, the first fixing hole and the second fixing hole are internally movably inserted with the same fixing bolt, the fixing bolt is externally sleeved with a fixing nut, and the fixing plate and the fixing groove are connected through a plurality of limiting and supporting mechanisms.

Furthermore, the limiting support mechanism comprises a limiting support rod, a limiting support cylinder and a limiting support spring, the limiting support rod is movably inserted into the limiting support cylinder, the limiting support spring is wound and connected outside the limiting support rod, and two ends of the limiting support spring are respectively and fixedly connected to the side wall of the limiting support rod and the outer side wall of the limiting support cylinder.

Furthermore, a sealing mechanism is arranged between the upper casing and the lower casing, the sealing mechanism comprises a sealing ring and a sealing groove, the sealing ring is movably inserted into the sealing groove, the sealing ring is fixedly arranged on the lower end face of the upper casing, and the sealing groove is formed in the upper end face of the lower casing.

Further, be provided with buffer gear in the fixed slot, including third fixed orifices, direction supporting component and buffering movable plate, buffering movable plate activity sets up in the fixed slot, and fixedly connected with a plurality of direction supporting component on the lower terminal surface of buffering movable plate, direction supporting component's free end fixed connection is on the interior diapire of fixed slot, a plurality of third fixed orifices has been seted up on the buffering movable plate.

Furthermore, the direction supporting component comprises a direction supporting rod, a direction supporting cylinder and a direction supporting spring, the direction supporting rod is movably inserted in the direction supporting cylinder, the direction supporting spring is wound and connected outside the direction supporting rod, and two ends of the direction supporting spring are respectively and fixedly connected to the side wall of the direction supporting rod and the outer side wall of the direction supporting cylinder.

Further, a first anti-falling mechanism is arranged in the fixing mechanism.

Further, first anti-disengaging mechanism includes first through-hole and second through-hole, first through-hole is seted up on the buffering movable plate, the second through-hole is seted up on the fixed slot, set up on the fixed plate with first through-hole assorted grafting backup pad, and seted up first shifting chute and second shifting chute in the grafting backup pad, first shifting chute and second shifting chute intercommunication set up, and the activity of first shifting chute is provided with first joint board, the lateral wall fixedly connected with first supporting spring of first joint board, and the free end fixed connection of first supporting spring is on the lateral wall of first shifting chute, fixedly connected with spacing slider on the both sides wall of first joint board, and spacing slider slides and sets up in the spacing spout of seting up in the grafting backup pad, fixedly connected with pulls the steel cable on the lower terminal surface of first joint board, and pulls the free end fixed connection of steel cable on the up end face of rectangle abutting block, rectangle abutting block slides and sets up in the second shifting chute, and fixedly connected with second supporting spring on the diapire of second shifting chute, the upper end fixed connection that the second supported the spring in aperture, the upper end fixed connection of rectangle abutting block that sets up is less than the second through-hole.

Furthermore, a second anti-falling mechanism is arranged in the first anti-falling mechanism.

Further, the second anti-disengaging mechanism comprises a touch rod and a third moving groove, the touch rod is movably inserted into the third moving groove formed in the inserting supporting plate, a third supporting spring is wound outside the touch rod, two ends of the third supporting spring are fixedly connected to the side wall of the touch rod and the side wall of the third moving groove respectively, a trapezoidal touch block is fixedly connected to the lower end of the touch rod, a second clamping plate is arranged in the third moving groove in a sliding mode, a plurality of fourth supporting springs are fixedly connected to the side wall of the second clamping plate, free ends of the fourth supporting springs are fixedly connected to the side wall of the third moving groove, and supporting through holes communicated with the second through holes are formed in the fixing grooves.

(3) Has the advantages that:

according to the invention, the structure of the existing motor shell is optimized, and the optimized motor shell is converted into a detachable structure from an integrated structure, so that when the motor is damaged and needs to be maintained, the effects of high efficiency and light operation can be achieved through convenient disassembly and assembly.

According to the invention, the upper casing and the lower casing are additionally provided with the fixing mechanisms which are used for fixedly connecting the upper casing and the lower casing, and the fixing mechanisms are reasonable in structural design, so that the upper casing and the lower casing can be stably fixed, and meanwhile, the effect of convenient operation can be achieved during operation.

According to the invention, the sealing mechanism is additionally arranged between the upper casing and the lower casing, the sealing performance between the upper casing and the lower casing can be ensured due to the arrangement of the sealing mechanism, and the sealing mechanism is arranged in a built-in structure, so that the rapid aging of the sealing mechanism can be avoided, and the service life of the sealing mechanism can be prolonged.

The buffer mechanism is additionally arranged in the fixed groove, the buffer mechanism can play a buffer role, and particularly, the buffer mechanism is arranged in order to avoid rigid extrusion force to the fixed groove in the process of fixing the combined structure of the fixed bolt and the fixed nut.

The buffer moving plate fixing device is additionally provided with a first anti-falling mechanism which is used for assisting the fixing mechanism to fix the upper casing and the lower casing, and particularly, after the fixing mechanism fixes the upper casing and the lower casing, the first anti-falling mechanism can prevent the buffer moving plate from upwards resetting in the fixing groove through the limiting clamping effect.

The fixing mechanism is additionally provided with the second anti-falling mechanism which is used for assisting the fixing mechanism to fix the upper casing and the lower casing, and particularly, after the fixing mechanism fixes the upper casing and the lower casing, the second anti-falling mechanism can prevent the fixed plate and the fixed groove from moving relative to each other through limiting and abutting effects, so that the upper casing and the lower casing are fixed more firmly.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the motor structure of the present invention;

FIG. 2 is an enlarged schematic view of structure A in FIG. 1 of the motor of the present invention;

FIG. 3 is an enlarged schematic view of structure B in FIG. 1 of the motor of the present invention;

FIG. 4 is a schematic view of a motor structure of the present invention shown in FIG. 1 with a partially enlarged structure;

FIG. 5 is a schematic view of a further enlarged portion of FIG. 1 of the motor of the present invention;

FIG. 6 is an enlarged schematic view of structure C in FIG. 5 of the motor of the present invention;

fig. 7 is a partially enlarged structural schematic view of the motor structure diagram 5 of the present invention.

The reference numbers are as follows:

the upper housing 1, the lower housing 2, the sealing mechanism 3, the sealing ring 31, the sealing groove 32, the fixing mechanism 4, the fixing plate 41, the fixing groove 42, the limit support mechanism 43, the limit support rod 431, the limit support cylinder 432, the limit support spring 433, the first fixing hole 44, the second fixing hole 45, the fixing bolt 46, the fixing nut 47, the buffer mechanism 6, the third fixing hole 61, the guide support component 62, the guide support rod 621, the guide support cylinder 622, the guide support spring 623, the buffer moving plate 63, the first anti-dropping mechanism 7, the first through hole 71, the second through hole 72, the plug support plate 73, the first engaging plate 74, the first moving groove 75, the first support spring 76, the traction cable 77, the rectangular abutting block 78, the second moving groove 79, the second support spring 710, the limit slider 711, the limit sliding groove 712, the second abutting mechanism 8, the abutting rod 81, the third moving groove 82, the third support spring 83, the trapezoidal abutting block 84, the second engaging plate 85, the fourth support spring 86, and the anti-dropping support through hole 87.

Detailed Description

The invention will be further illustrated with reference to the following figures 1 to 7 and examples:

a motor structure comprises an upper shell 1 and a lower shell 2, wherein the upper shell 1 and the lower shell 2 are detachably arranged, the upper shell 1 and the lower shell 2 are fixedly connected through a fixing plate 41, the structure of the existing motor shell is optimized, the optimized motor shell is converted into a detachable structure from an integrated structure, and therefore when a motor is damaged and needs to be maintained, the effects of high efficiency and light operation can be achieved through convenient and fast disassembly and assembly.

In this embodiment, the fixing mechanism 4 includes a fixing plate 41 and a fixing groove 42, the fixing plate 41 is fixedly disposed on the outer side wall of the lower housing 2, a first fixing hole 44 is formed in the fixing plate 41, the fixing groove 42 is fixedly disposed on the outer side wall of the upper housing 1, a second fixing hole 45 is formed in the fixing groove 42, the same fixing bolt 46 is movably inserted into the first fixing hole 44 and the second fixing hole 45, a fixing nut 47 is sleeved on the outer thread of the fixing bolt 46, and the fixing plate 41 and the fixing groove 42 are connected through a plurality of limiting support mechanisms 43.

In this embodiment, the limiting support mechanism 43 includes a limiting support rod 431, a limiting support cylinder 432 and a limiting support spring 433, the activity of the limiting support rod 431 is inserted in the limiting support cylinder 432, the limiting support spring 433 is wound and connected outside the limiting support rod 431, and the two ends of the limiting support spring 433 are respectively fixedly connected on the side wall of the limiting support rod 431 and the outer side wall of the limiting support cylinder 432, the limiting support mechanism 43 is arranged, which can not only play a limiting role for the movement of the fixing groove 42, but also can keep the supporting role for the state of the fixing groove 42.

In the embodiment, the sealing mechanism 3 is arranged between the upper casing 1 and the lower casing 2, the sealing mechanism 3 comprises the sealing ring 31 and the sealing groove 32, the sealing ring 31 is movably inserted into the sealing groove 32, the sealing ring 31 is fixedly arranged on the lower end face of the upper casing 1, and the sealing groove 32 is arranged on the upper end face of the lower casing 2.

In this embodiment, the fixing groove 42 is internally provided with the buffer mechanism 6, which includes a third fixing hole 61, a guide support assembly 62 and a buffer moving plate 63, the buffer moving plate 63 is movably disposed in the fixing groove 42, the lower end surface of the buffer moving plate 63 is fixedly connected with a plurality of guide support assemblies 62, the free end of each guide support assembly 62 is fixedly connected to the inner bottom wall of the fixing groove 42, and the buffer moving plate 63 is provided with a plurality of third fixing holes 61.

In this embodiment, the guiding support assembly 62 includes a guiding support rod 621, a guiding support cylinder 622 and a guiding support spring 623, the guiding support rod 621 is movably inserted in the guiding support cylinder 622, the guiding support spring 623 is wound outside the guiding support rod 621, and two ends of the guiding support spring 623 are respectively and fixedly connected to the side wall of the guiding support rod 621 and the outer side wall of the guiding support cylinder 622, the guiding support assembly 62 is arranged, which not only can play a guiding support role for the movement of the buffering moving plate 63, but also can provide power for the reset movement of the buffering moving plate 63.

In this embodiment, the fixing mechanism 4 is internally provided with a first anti-slip mechanism 7, the first anti-slip mechanism 7 includes a first through hole 71 and a second through hole 72, the first through hole 71 is formed on the buffer moving plate 63, the second through hole 72 is formed on the fixing groove 42, the fixing plate 41 is provided with an insertion support plate 73 matching with the first through hole 71, and the inserting support plate 73 is provided with a first moving groove 75 and a second moving groove 79, the first moving groove 75 and the second moving groove 79 are communicated, and a first engaging plate 74 is movably disposed in the first moving groove 75, a first supporting spring 76 is fixedly connected to a side wall of the first engaging plate 74, and the free end of the first supporting spring 76 is fixedly connected to the side wall of the first moving groove 75, the both side walls of the first engaging plate 74 are fixedly connected to the limit slider 711, and the limit slider 711 is slidably disposed in a limit sliding slot 712 formed on the inserting support plate 73, a traction steel cable 77 is fixedly connected to the lower end surface of the first clamping plate 74, and the free end of the traction steel cable 77 is fixedly connected on the upper end surface of the rectangular contact block 78, the rectangular contact block 78 is arranged in the second moving groove 79 in a sliding way, and the bottom wall of the second moving groove 79 is fixedly connected with a second supporting spring 710, the upper end of the second supporting spring 710 is fixedly connected with the rectangular contact block 78, the aperture of the first through hole 71 is smaller than that of the second through hole 72, the invention is additionally provided with a first anti-falling mechanism 7 and a first anti-falling mechanism 7, is used for assisting the fixing mechanism 4 to fix the upper machine shell 1 and the lower machine shell 2, in particular, after the fixing mechanism 4 fixes the upper machine shell 1 and the lower machine shell 2, the arrangement of a first anti-falling mechanism 7, the buffer moving plate 63 can be prevented from moving upwards in the fixed groove 42 by the limiting clamping action.

In this embodiment, a second anti-separation mechanism 8 is disposed in the first anti-separation mechanism 7, the second anti-separation mechanism 8 includes a contact rod 81 and a third moving groove 82, the contact rod 81 is movably inserted into the third moving groove 82 formed in the insertion support plate 73, and the contact rod 81 is wound outside and connected with a third support spring 83, two ends of the third support spring 83 are respectively and fixedly connected to a side wall of the contact rod 81 and a side wall of the third moving groove 82, a trapezoidal contact block 84 is fixedly connected to a lower end of the contact rod 81, a second clamping plate 85 is slidably disposed in the third moving groove 82, and a plurality of fourth support springs 86 are fixedly connected to a side wall of the second clamping plate 85, a free end of each fourth support spring 86 is fixedly connected to a side wall of the third moving groove 82, a support through hole 87 communicated with the second through hole 72 is formed in the fixing groove 42, in the present invention, the second anti-separation mechanism 8 is added, the second anti-separation mechanism 8 is disposed to assist the fixing mechanism 4 to fix the upper casing 1 and the lower casing 2, specifically, the fixing mechanism 4 is disposed on the lower casing 2, and can prevent the fixing plate 41 and the lower casing 2 from moving relatively.

The working principle of the invention comprises the following processes:

when the upper housing 1 and the lower housing 2 need to be assembled, the fixing bolt 46 is firstly inserted into the first fixing hole 44, then the lower housing 2 is placed on the workbench, then the upper housing 1 is pressed downwards, the downward movement of the upper housing 1 drives the fixing groove 42 to move downwards, and in the process of downward movement of the fixing groove 42, one side of the fixing bolt 46 can pass through the second fixing hole 45 and the third fixing hole 61; after the upper machine shell 1 is contacted with the lower machine shell 2, the fixing nut 47 is sleeved on the fixing bolt 46 in a threaded manner, and the fixing nut 47 is screwed, so that the fixing nut 47 moves downwards relative to the fixing bolt 46; in this process, the inserting support plate 73 passes through the second through hole 72 and the first through hole 71 in sequence;

along with the continuous downward movement of the fixed nut 47, the buffer moving plate 63 is pressed to move towards the inside of the fixed groove 42, and the downward movement of the buffer moving plate 63 pushes the abutting rod 81 to move downwards relative to the plug support plate 73, on one hand, the downward movement of the abutting rod 81 drives the trapezoidal abutting block 84 to move downwards, the downward movement of the trapezoidal abutting block 84 pushes the second clamping plate 85 to move towards the outside of the third moving groove 82, and along with the continuous movement of the second clamping plate 85, the trapezoidal abutting block enters the support through hole 87, so that the current position of the plug support plate 73 relative to the fixed groove 42 can be locked through the combined action of the second clamping plate 85 and the support through hole 87; on the other hand, with the downward movement of the buffer moving plate 63, the rectangular contact block 78 is pushed to move downward relative to the insertion support plate 73, the downward movement of the rectangular contact block 78 pulls the first clamping plate 74 to move out of the first moving groove 75 through the traction steel rope 77, and with the continuous movement of the first clamping plate 74, the rectangular contact block moves out of the first moving groove 75, so that the buffer moving plate 63 is clamped in a limiting manner, and the buffer moving plate 63 can be prevented from moving back; in summary, the upper casing 1 and the lower casing 2 can be fixed together by the fixing mechanism 4; through the setting of first anti-disengaging mechanism 7 and the 8 integrated configuration of second anti-disengaging mechanism, can prevent the not hard up process that fixing bolt 46 and fixation nut 47 took place, ensure the life-span that motor casing used after the improvement like this more for a long time.

The invention has the beneficial effects that:

According to the invention, the fixing mechanism 4 is additionally arranged on the upper casing 1 and the lower casing 2, the fixing mechanism 4 is used for fixedly connecting the upper casing 1 and the lower casing 2, and the fixing mechanism 4 is reasonable in structural design, so that the upper casing 1 and the lower casing 2 can be stably fixed, and meanwhile, the effect of convenient operation can be achieved during operation.

According to the invention, the sealing mechanism 3 is additionally arranged between the upper casing 1 and the lower casing 2, the sealing performance between the upper casing 1 and the lower casing 2 can be ensured due to the arrangement of the sealing mechanism 3, and the sealing mechanism 3 is arranged in a built-in structure, so that the rapid aging of the sealing mechanism 3 can be avoided, and the service life of the sealing mechanism 3 can be prolonged.

The buffer mechanism 6 is additionally arranged in the fixing groove 42, the buffer mechanism 6 can play a buffer role, and particularly, the buffer mechanism 6 is arranged in order to avoid rigid extrusion force to the fixing groove 42 in the process of fixing the combined structure of the fixing bolt 46 and the fixing nut 47.

The first anti-falling mechanism 7 is additionally arranged in the invention, and the arrangement of the first anti-falling mechanism 7 is used for assisting the fixing mechanism 4 to fix the upper casing 1 and the lower casing 2, specifically, after the fixing mechanism 4 fixes the upper casing 1 and the lower casing 2, the arrangement of the first anti-falling mechanism 7 can prevent the buffer moving plate 63 from doing reset motion upwards in the fixing groove 42 through the limiting clamping effect.

In the invention, the second anti-falling mechanism 8 is additionally arranged, the second anti-falling mechanism 8 is used for assisting the fixing mechanism 4 to fix the upper casing 1 and the lower casing 2, and particularly, after the fixing mechanism 4 fixes the upper casing 1 and the lower casing 2, the second anti-falling mechanism 8 can prevent the fixed plate 41 and the fixed groove 42 from moving relatively through the limiting and abutting effect, so that the upper casing 1 and the lower casing 2 are fixed more firmly.

The embodiments of the present invention are disclosed as the preferred embodiments, but not limited thereto, and those skilled in the art can easily understand the spirit of the present invention and make various extensions and changes without departing from the spirit of the present invention.

Claims

1. A motor structure comprises an upper machine shell (1) and a lower machine shell (2), and is characterized in that the upper machine shell (1) and the lower machine shell (2) are arranged in a dismounting way, the upper machine shell (1) and the lower machine shell (2) are fixedly connected through a fixing mechanism (4), the fixing mechanism (4) comprises a fixing plate (41) and a fixing groove (42), the fixing plate (41) is fixedly arranged on the outer side wall of the lower machine shell (2), a first fixing hole (44) is formed in the fixing plate (41), the fixing groove (42) is fixedly arranged on the outer side wall of the upper machine shell (1), a second fixing hole (45) is formed in the fixing groove (42), and the first fixing hole (44) and the second fixing hole (45) are movably inserted with a same fixing bolt (46);

a fixing nut (47) is sleeved on the external thread of the fixing bolt (46), and the fixing plate (41) is connected with the fixing groove (42) through a plurality of limiting and supporting mechanisms (43);

the limiting support mechanism (43) comprises a limiting support rod (431), a limiting support barrel (432) and a limiting support spring (433), the limiting support rod (431) is movably inserted into the limiting support barrel (432), the limiting support spring (433) is wound outside the limiting support rod (431), and two ends of the limiting support spring (433) are fixedly connected to the side wall of the limiting support rod (431) and the outer side wall of the limiting support barrel (432) respectively;

a sealing mechanism (3) is arranged between the upper casing (1) and the lower casing (2), the sealing mechanism (3) comprises a sealing ring (31) and a sealing groove (32), the sealing ring (31) is movably inserted in the sealing groove (32), the sealing ring (31) is fixedly arranged on the lower end face of the upper casing (1), and the sealing groove (32) is arranged on the upper end face of the lower casing (2);

the buffer mechanism (6) is arranged in the fixed groove (42), the buffer mechanism comprises a third fixed hole (61), a guide supporting assembly (62) and a buffer moving plate (63), the buffer moving plate (63) is movably arranged in the fixed groove (42), the lower end face of the buffer moving plate (63) is fixedly connected with a plurality of guide supporting assemblies (62), the free ends of the guide supporting assemblies (62) are fixedly connected to the inner bottom wall of the fixed groove (42), and the buffer moving plate (63) is provided with a plurality of third fixed holes (61);

the guide support assembly (62) comprises a guide support rod (621), a guide support cylinder (622) and a guide support spring (623), the guide support rod (621) is movably inserted into the guide support cylinder (622), the guide support spring (623) is wound outside the guide support rod (621), and two ends of the guide support spring (623) are fixedly connected to the side wall of the guide support rod (621) and the outer side wall of the guide support cylinder (622) respectively;

a first anti-falling mechanism (7) is arranged in the fixing mechanism (4);

the first anti-falling mechanism (7) comprises a first through hole (71) and a second through hole (72), the first through hole (71) is formed in the buffer moving plate (63), the second through hole (72) is formed in the fixing groove (42), an inserting support plate (73) matched with the first through hole (71) is formed in the fixing plate (41), a first moving groove (75) and a second moving groove (79) are formed in the inserting support plate (73), the first moving groove (75) and the second moving groove (79) are communicated, a first clamping plate (74) is movably arranged in the first moving groove (75), a first support spring (76) is fixedly connected to the side wall of the first clamping plate (74), the free end of the first support spring (76) is fixedly connected to the side wall of the first moving groove (75), a limit sliding block (711) is fixedly connected to the two side walls of the first clamping plate (74), a limit sliding block (711) is fixedly connected to the rectangular sliding block (712) arranged on the inserting support plate (73), a lower end face of a rectangular steel rope (78) is fixedly connected to the first clamping plate (74), a traction block (77) is fixedly connected to the rectangular contact block (77) which is arranged on the rectangular sliding block (79), and a second supporting spring (710) is fixedly connected to the bottom wall of the second moving groove (79), the upper end of the second supporting spring (710) is fixedly connected to the rectangular contact block (78), and the aperture of the first through hole (71) is smaller than that of the second through hole (72).

2. The electric machine structure of claim 1, wherein: and a second anti-falling mechanism (8) is arranged in the first anti-falling mechanism (7).

3. The electric machine structure of claim 2, wherein: the second anti-disengaging mechanism (8) comprises a contact rod (81) and a third moving groove (82), the contact rod (81) is movably inserted into the third moving groove (82) formed in the inserting support plate (73), a third support spring (83) is wound and connected outside the contact rod (81), two ends of the third support spring (83) are fixedly connected to the side wall of the contact rod (81) and the side wall of the third moving groove (82) respectively, a trapezoidal contact block (84) is fixedly connected to the lower end of the contact rod (81), a second clamping plate (85) is arranged in the third moving groove (82) in a sliding mode, a plurality of fourth support springs (86) are fixedly connected to the side wall of the second clamping plate (85), the free ends of the fourth support springs (86) are fixedly connected to the side wall of the third moving groove (82), and support through holes (87) communicated with the second through holes (72) are formed in the fixing grooves (42).