CN113700662A

CN113700662A - Noise-reduction environment-friendly centrifugal fan

Info

Publication number: CN113700662A
Application number: CN202110979124.9A
Authority: CN
Inventors: 陈缓缓; 闫哲
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-08-25
Filing date: 2021-08-25
Publication date: 2021-11-26

Abstract

The invention relates to the technical field of centrifugal fans, in particular to a noise-reducing environment-friendly centrifugal fan which comprises a fan body, a base, an inner groove, an impeller, an air outlet, an air inlet, a damping structure and a rotating mechanism, wherein the damping structure is connected between the fan body and the base, the fan body comprises a shell, the air outlet is fixedly connected to the outer surface of the right side of the shell, the inner groove is formed in the outer surface of the front end of the shell, a motor is fixedly connected to the outer surface of the rear end of the shell, and an output shaft of the motor penetrates through the inner part of the inner groove and is fixedly connected with the impeller. According to the invention, by arranging the rotating mechanism and the damping structure, dust and impurities attached to the surface of the filter screen can be cleaned in the running process of the fan body, the influence of the dust attached to the surface of the filter screen on the air inlet effect of the filter screen for a long time is avoided, and meanwhile, the dust and the impurities are corroded to a certain extent due to the fact that the dust and the impurities are attached to the surface of the filter screen for a long time, so that the dust and the impurities can be cleaned in time through the rotating mechanism.

Description

Noise-reduction environment-friendly centrifugal fan

Technical Field

The invention relates to the technical field of centrifugal fans, in particular to a noise-reducing environment-friendly centrifugal fan.

Background

The centrifugal fan is a driven fluid machine which increases the gas pressure and discharges gas by means of input mechanical energy, and is widely used for ventilation, dust exhaust and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings; ventilation and draught of boilers and industrial furnaces; cooling and ventilation in air conditioning equipment and household appliances; drying and selecting grains; wind tunnel wind source and air cushion boat inflation and propulsion.

The high-efficiency centrifugal fan with stable air outlet in the prior patent (publication number: CN212202558U) comprises a centrifugal fan, wherein an auxiliary structure is detachably connected to one side wall of the centrifugal fan, a damping structure is connected to the bottom of the centrifugal fan, a motor is connected to the middle of the side wall of the centrifugal fan, which is far away from the auxiliary structure, a bottom pillar is arranged at the bottom of the damping structure, a fixing plate is fixedly connected to the bottom end of the bottom pillar, and a plurality of screw holes are uniformly formed in the fixing plate.

Although the centrifugal fan can buffer and degrade the vibration generated when the centrifugal fan operates, the vibration of the centrifugal fan is reduced to the minimum, and the stability of the air outlet of the centrifugal fan is prevented from being influenced by the vibration, but the centrifugal fan still has the following defects:

current centrifugal fan can set up the filter screen at the air intake of casing in order to prevent that foreign matter or dust from getting into the inside normal operation that influences the fan of casing, but at the in-process of long-time use, its filter screen surface can adhere to a large amount of dusts and impurity to reduce the air inlet effect of fan, especially when the great processing factory of some dusts uses, this kind of phenomenon is especially outstanding.

Therefore, the noise-reducing environment-friendly centrifugal fan is provided.

Disclosure of Invention

The invention aims to provide a noise-reducing environment-friendly centrifugal fan, which can clean dust and impurities attached to the surface of a filter screen in the running process of a fan body by arranging a rotating mechanism and a damping structure, so that the influence of the dust attached to the surface of the filter screen on the air inlet effect of the filter screen for a long time is avoided, and meanwhile, the dust and the impurities are corroded to a certain extent due to the fact that the dust and the impurities are attached to the surface of the filter screen for a long time, so that the noise-reducing environment-friendly centrifugal fan can be cleaned in time by the rotating mechanism, and the problems in the background art are solved.

In order to achieve the purpose, the invention provides the following technical scheme: a noise-reducing environment-friendly centrifugal fan comprises a fan body, a base, an inner groove, an impeller, an air outlet, an air inlet, a damping structure and a rotating mechanism, wherein the damping structure is connected between the fan body and the base, the fan body comprises a shell, the air outlet is fixedly connected to the outer surface of the right side of the shell, the inner groove is formed in the outer surface of the front end of the shell, a motor is fixedly connected to the outer surface of the rear end of the shell, an output shaft of the motor penetrates through the inner part of the inner groove and is fixedly connected with the impeller, a filter screen is fixedly connected to the front end of the inner surface of the inner groove, and the rotating mechanism is arranged at the position, corresponding to the filter screen, outside the shell;

slewing mechanism includes screw ring, connecting plate, swivel ring and clearance subassembly, the thread groove has been seted up to the front end surface of casing, and the inside threaded connection of thread groove has the screw ring, the outer fixed surface of screw ring is connected with the connecting plate, and one side surface of connecting plate has seted up the activity hole, the front end surface of connecting plate has seted up the activity groove near the position at edge, and the inside rotation in activity groove is connected with the swivel ring, the outer fixed surface of activity ring is connected with the swivel ring, and the inside rotation of swivel ring is connected with a plurality of groups clearance subassembly, clearance subassembly and filter screen surface laminate each other, the upper end surface of base is located left position fixedly connected with rack one, and the left side surface equidistance fixedly connected with a plurality of groups tooth one of swivel ring, rack one and tooth intermeshing.

Through setting up slewing mechanism and shock-absorbing structure, can clear up filter screen surface adnexed dust and impurity at fan body operation in-process, avoid the dust to adhere to in filter screen surface for a long time and cause the influence to its air inlet effect, dust and the long-time adhesion of impurity can lead to the fact certain degree's corruption to it on filter screen surface simultaneously, consequently can in time clear up it through slewing mechanism.

Preferably, the clearance subassembly includes dwang, clearance board, dead lever, movable block, water storage chamber and clearance cotton, the inside position that is close to the center of activity hole is provided with the movable block, and the outward appearance of movable block personally submits equidistance annular fixedly connected with dead lever, the one end of dead lever and the internal surface fixed connection in activity hole are provided with a plurality of groups dwang, a plurality of groups for the annular equidistance between activity block and the activity hole the outer fixed surface of dwang is connected with a plurality of groups clearance board, the surface of clearance board has the clearance cotton through magic subsides bonding, and the surface of the cotton surface of clearance closely laminates with the surface of filter screen.

In the operation process, the casing receives fan body operation to influence and produces vibrations, consequently reciprocates along shock-absorbing structure, at the in-process that the casing reciprocated, because rack one and tooth intermeshing, the rotating ring drives the movable block and rotates, consequently the dwang drives its surperficial clearance board and rotates along with the rotating ring is positive reverse, utilizes the friction between clearance cotton and the filter screen on clearance board surface to clear up the filter screen surface to can regularly change the clearance cotton.

Preferably, the surface of dwang is close to the one end fixedly connected with loose axle of movable block, and the notch has been seted up to the inside of movable block, the loose axle runs through to the inside of notch and fixedly connected with gear one, and the position that the internal surface of notch is close to the front end rotates and is connected with the installation piece, the internal surface of installation piece is close to a plurality of tooth of the position fixedly connected with two on edge, and the installation piece passes through tooth two and a plurality of gear of group and all meshes, the one end of dwang runs through to the inside of swivel becket and is connected rather than rotating, the front end outer fixed surface of installation piece is connected with the fixed axle, and the outer fixed surface of fixed axle is connected with gear two, one side outer surface toothing of gear two has rack two, and the lower extreme and the base fixed connection of rack two.

When the shell body moves up and down, the second rack pushes the second gear to drive the mounting block to rotate positively and negatively, and the second teeth on the inner surface of the mounting block are meshed with the first gear, so that the first gear drives the rotating rod and the cleaning plate on the surface of the rotating rod to rotate in the positive and negative rotation process of the mounting block, and the cleaning strength and the cleaning effect are improved.

Preferably, the water storage chamber has been seted up to the inside of swivel becket, the water conservancy diversion chamber has been seted up to the inside of dwang, and the internal surface in water conservancy diversion chamber communicates with each other with the internal surface in water storage chamber, the internal surface in water conservancy diversion chamber runs through to the inside of clearance board, and the position that the internal surface in water conservancy diversion chamber and clearance cotton correspond has seted up the apopore.

Before the operation, operating personnel can pour into the scavenging solution into to water storage intracavity portion, the scavenging solution flows to the runner cavity and soaks the clearance cotton through the apopore, consequently, the clearance board that drives its surface at the dwang rotates along with the rotating ring is positive reverse, the clearance cotton of the infiltration clearance liquid of utilization clearance board surface is cleared up the filter screen surface, and simultaneously, when the casing reciprocated, two promotion gears of rack two drive the installation piece and rotate positively and negatively, consequently, first drive dwang and the clearance board on surface of the dwang, the clearance cotton of infiltration clearance liquid rotates, thereby guarantee the clearance effect of device.

Preferably, shock-absorbing structure includes fixed column and damping spring, the mounting groove has been seted up to the upper end surface of base, and the bottom fixedly connected with fixed column of mounting groove internal surface, the top of fixed column run through to the inside of casing and rather than swing joint, and the surface of fixed column has cup jointed damping spring, damping spring's both ends are connected with mounting groove and casing surface fixed connection respectively.

In the operation process of the fan body, the motor drives the impeller to rotate, so that vibration can be generated to enable the fan body to drive the shell to move up and down along the fixed column and extrude the damping spring, and the influence of the vibration on the fan body is reduced by utilizing the high elasticity of the damping spring.

Compared with the prior art, the invention has the beneficial effects that:

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of A of FIG. 1 in accordance with the present invention;

FIG. 3 is an enlarged view of B of FIG. 1 in accordance with the present invention;

FIG. 4 is a cross-sectional view of C-C of FIG. 1 of the present invention;

FIG. 5 is an enlarged view of D of FIG. 4 of the present invention;

fig. 6 is an enlarged view of E of fig. 4 according to the present invention.

In the figure: 1. a fan body; 2. a base; 3. an inner tank; 4. an impeller; 5. an air outlet; 6. an air inlet; 7. a shock-absorbing structure; 71. fixing a column; 72. a damping spring; 73. mounting grooves; 8. a rotating mechanism; 81. a threaded ring; 82. a connecting plate; 83. a thread groove; 84. a rotating ring; 841. a first tooth; 85. a movable hole; 86. a movable groove; 87. a movable ring; 88. cleaning the assembly; 881. rotating the rod; 882. cleaning the plate; 883. fixing the rod; 884. a movable block; 885. a water storage cavity; 886. cleaning cotton; 887. a movable shaft; 888. a notch; 889. a first gear; 89. a first rack; 9. a housing; 10. a motor; 11. filtering with a screen; 12. mounting blocks; 121. a second tooth; 122. a fixed shaft; 123. a second gear; 124. a second rack; 125. and a flow guide cavity.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 6, the present invention provides a technical solution:

a noise-reducing environment-friendly centrifugal fan is shown in figures 1 and 6 and comprises a fan body 1, a base 2, an inner groove 3, an impeller 4, an air outlet 5, an air inlet 6, a damping structure 7 and a rotating mechanism 8, wherein the damping structure 7 is connected between the fan body 1 and the base 2, the fan body 1 comprises a shell 9, the air outlet 5 is fixedly connected to the outer surface of the right side of the shell 9, the inner groove 3 is formed in the outer surface of the front end of the shell 9, a motor 10 is fixedly connected to the outer surface of the rear end of the shell 9, an output shaft of the motor 10 penetrates through the inner groove 3 and is fixedly connected with the impeller 4, a filter screen 11 is fixedly connected to the front end of the inner surface of the inner groove 3, and the rotating mechanism 8 is arranged at a position, corresponding to the filter screen 11, outside the shell 9;

the rotating mechanism 8 comprises a threaded ring 81, a connecting plate 82, a rotating ring 84 and a cleaning assembly 88, a threaded groove 83 is formed in the outer surface of the front end of the shell 9, the threaded ring 81 is connected to the inner thread of the threaded groove 83, the connecting plate 82 is fixedly connected to the outer surface of the threaded ring 81, a movable hole 85 is formed in the outer surface of one side of the connecting plate 82, a movable groove 86 is formed in the position, close to the edge, of the outer surface of the front end of the connecting plate 82, a movable ring 87 is rotatably connected to the inner portion of the movable groove 86, a rotating ring 84 is fixedly connected to the outer surface of the movable ring 87, a plurality of groups of cleaning assemblies 88 are rotatably connected to the inner portion of the rotating ring 84, the cleaning assemblies 88 are mutually attached to the surface of the filter screen 11, the outer surface of the upper end of the base 2 is fixedly connected with a rack I89 at the left side, and a plurality of groups of teeth 841 are fixedly connected to the outer surface of the rotating ring 84 at equal intervals, the first rack 89 is meshed with the first tooth 841.

Through setting up slewing mechanism 8 and shock-absorbing structure 7, can clear up 11 adnexed dust in surface of filter screen and impurity at fan body 1 operation in-process, avoid the dust to adhere to in 11 surfaces of filter screen for a long time and cause the influence to its air inlet effect, the long-time adhesion of dust and impurity can cause its corruption to it on 11 surfaces of filter screen simultaneously, consequently can in time clear up it through slewing mechanism 8.

As an embodiment of the present invention, as shown in fig. 1 to 4, the cleaning assembly 88 includes a rotating rod 881, a cleaning plate 882, a fixing rod 883, a moving block 884, a water storage cavity 885 and a cleaning cotton 886, the moving block 884 is disposed at a position close to the center inside the moving hole 85, the outer surface of the moving block 884 is fixedly connected with the fixing rod 883 in an equidistant annular shape, one end of the fixing rod 883 is fixedly connected with the inner surface of the moving hole 85, a plurality of groups of rotating rods 881 are disposed between the moving block 884 and the moving hole 85 in an annular shape and in an equidistant shape, a plurality of groups of cleaning plates 882 are fixedly connected to the outer surface of the groups of rotating rods 881, the cleaning cotton 886 is adhered to the outer surface of the cleaning plates 882 by magic, and the outer surface of the cleaning cotton 886 is tightly adhered to the outer surface of the filter screen 11.

In the operation process, casing 9 receives the fan body 1 operation to influence and produces vibrations, consequently reciprocates along shock-absorbing structure 7, in the in-process that casing 9 reciprocated, because rack 89 and tooth 841 intermeshing, swivel 84 drives movable block 884 and rotates, therefore dwang 881 drives its surperficial clearance board 882 along with swivel 84 forward and reverse rotation, utilize the cotton 886 of clearance on clearance board 882 surface and the friction between the filter screen 11 to clear up the filter screen 11 surface, and can regularly change clearance cotton 886.

As an embodiment of the present invention, as shown in fig. 2 to 5, one end of the outer surface of the rotating rod 881 close to the movable block 884 is fixedly connected with a movable shaft 887, and the inside of the movable block 884 is provided with a notch 888, the movable shaft 887 penetrates into the notch 888 and is fixedly connected with a first gear 889, the position of the inner surface of the notch 888 close to the front end is rotatably connected with a mounting block 12, the position of the inner surface of the mounting block 12 close to the edge is fixedly connected with a plurality of sets of second teeth 121, the mounting block 12 is engaged with the plurality of sets of first gears 889 through the second teeth 121, one end of the rotating rod 881 penetrates into the rotating ring 84 and is rotatably connected therewith, the outer surface of the front end of the mounting block 12 is fixedly connected with a fixed shaft 122, the outer surface of the fixed shaft 122 is fixedly connected with a second gear 123, one side outer surface of the second gear 123 is engaged with a second rack 124, and the lower end of the second rack 124 is fixedly connected with the base 2.

When the housing 9 moves up and down, the second rack 124 pushes the second gear 123 to drive the mounting block 12 to rotate forward and backward, and since the second teeth 121 on the inner surface of the mounting block 12 are meshed with the first gear 889, the first gear 889 drives the rotating rod 881 and the cleaning plate 882 on the surface thereof to rotate during the forward and backward rotation of the mounting block 12, thereby improving the cleaning strength and the cleaning effect.

As an embodiment of the present invention, as shown in fig. 3 and 6, a water storage cavity 885 is formed inside the rotating ring 84, a diversion cavity 125 is formed inside the rotating rod 881, an inner surface of the diversion cavity 125 is communicated with an inner surface of the water storage cavity 885, the inner surface of the diversion cavity 125 penetrates through the inside of the cleaning plate 882, and a water outlet is formed at a position where the inner surface of the diversion cavity 125 corresponds to the cleaning cotton 886.

Before the operation, operating personnel can be to the inside injection clearance liquid in water storage chamber 885, clearance liquid flows to guide chamber 125 and soaks clearance cotton 886 through the apopore, consequently, it rotates along with the rotating ring 84 forward and reverse to drive the clearance board 882 on its surface at dwang 881, utilize the clearance cotton 886 of the soakage clearance liquid on clearance board 882 surface to clear up filter screen 11 surface, simultaneously, when casing 9 reciprocates, two 124 of rack promote two 123 of gear drive installation piece 12 forward and reverse rotation, consequently one 889 of gear drives the clearance board 882 on dwang 881 and its surface, the clearance cotton 886 of soakage clearance liquid rotates, thereby guarantee the clearance effect of device.

As an embodiment of the present invention, as shown in fig. 1 and 4, the damping structure 7 includes a fixing column 71 and a damping spring 72, an installation groove 73 is formed on an outer surface of an upper end of the base 2, the fixing column 71 is fixedly connected to a bottom end of an inner surface of the installation groove 73, a top end of the fixing column 71 penetrates through the inside of the housing 9 and is movably connected to the inside, the damping spring 72 is sleeved on an outer surface of the fixing column 71, and two ends of the damping spring 72 are respectively fixedly connected to the installation groove 73 and the outer surface of the housing 9.

In the operation process of the fan body 1, the motor 10 drives the impeller 4 to rotate, so that vibration is generated to enable the fan body 1 to drive the shell 9 to move up and down along the fixed column 71 and extrude the damping spring 72, and the influence of the vibration on the fan body 1 is reduced by utilizing the high elasticity of the damping spring 72.

The working principle is as follows: during operation, the shell 9 is vibrated by the operation influence of the fan body 1, so the shell 9 moves up and down along the damping structure 7 and presses the damping spring 72, during the up and down movement of the shell 9, as the rack 89 and the tooth 841 are meshed with each other, the rotating ring 84 drives the movable block 884 to rotate, so the rotating rod 881 drives the cleaning plate 882 on the surface thereof to rotate in the forward and reverse directions along with the rotating ring 84, the surface of the filter screen 11 is cleaned by the friction between the cleaning cotton 886 on the surface of the cleaning plate 882 and the filter screen 11, and the cleaning cotton 886 can be replaced periodically, meanwhile, while the shell 9 moves up and down, the rack 124 pushes the gear 123 to drive the mounting block 12 to rotate in the forward and reverse directions, and as the tooth 121 on the inner surface of the mounting block 12 is meshed with the gear 889, so during the forward and reverse rotation of the mounting block 12, the gear 889 drives the rotating rod 881 and the cleaning plate 882 on the surface thereof to rotate, improve cleaning strength and clearance effect to before the operation, operating personnel can be to the inside injection clearance liquid of water storage chamber 885, and the clearance liquid flows to guide chamber 125 and soaks clearance cotton 886 through the apopore, improves the clearance effect of device.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an environmental protection centrifugal fan of making an uproar falls, includes fan body (1), base (2), inside groove (3), impeller (4), air outlet (5), air intake (6), shock-absorbing structure (7) and slewing mechanism (8), its characterized in that: a damping structure (7) is connected between the fan body (1) and the base (2), the fan body (1) comprises a shell (9), an air outlet (5) is fixedly connected to the outer surface of the right side of the shell (9), an inner groove (3) is formed in the outer surface of the front end of the shell (9), a motor (10) is fixedly connected to the outer surface of the rear end of the shell (9), an output shaft of the motor (10) penetrates through the inner part of the inner groove (3) and is fixedly connected with an impeller (4), a filter screen (11) is fixedly connected to the front end of the inner surface of the inner groove (3), and a rotating mechanism (8) is arranged at a position, corresponding to the filter screen (11), outside the shell (9);

the rotating mechanism (8) comprises a threaded ring (81), a connecting plate (82), a rotating ring (84) and cleaning components (88), a threaded groove (83) is formed in the outer surface of the front end of the shell (9), the threaded ring (81) is connected to the inner thread of the threaded groove (83), the connecting plate (82) is fixedly connected to the outer surface of the threaded ring (81), a movable hole (85) is formed in the outer surface of one side of the connecting plate (82), a movable groove (86) is formed in the position, close to the edge, of the outer surface of the front end of the connecting plate (82), the movable ring (87) is rotatably connected to the inner portion of the movable groove (86), the rotating ring (84) is fixedly connected to the outer surface of the movable ring (87), a plurality of groups of cleaning components (88) are rotatably connected to the inner portion of the rotating ring (84), and the cleaning components (88) are mutually attached to the surface of the filter screen (11), the outer surface of the upper end of the base (2) is located on the left side and fixedly connected with a first rack (89), a plurality of groups of first teeth (841) are fixedly connected to the outer surface of the left side of the rotating ring (84) in an equidistant mode, and the first rack (89) and the first teeth (841) are meshed with each other.

2. The noise-reducing environment-friendly centrifugal fan according to claim 1, characterized in that: clearance subassembly (88) include dwang (881), clearance board (882), dead lever (883), movable block (884), water storage chamber (885) and clearance cotton (886), the inside position that is close to the center of activity hole (85) is provided with movable block (884), and the outward appearance of movable block (884) is equidistance annular fixedly connected with dead lever (883), the one end of dead lever (883) and the internal surface fixed connection of activity hole (85), and be the annular equidistance between movable block (884) and activity hole (85) and be provided with a plurality of groups dwang (881), a plurality of groups the external surface fixed connection of dwang (881) has a plurality of groups clearance board (882).

3. The noise-reducing environment-friendly centrifugal fan according to claim 2, characterized in that: the surface of clearance board (882) has the clearance cotton (886) through magic subsides bonding, and the surface of clearance cotton (886) and the surface of filter screen (11) closely laminates.

4. The noise-reducing environment-friendly centrifugal fan according to claim 1, characterized in that: one end of the outer surface of the rotating rod (881) close to the movable block (884) is fixedly connected with a movable shaft (887), a notch (888) is formed in the movable block (884), the movable shaft (887) penetrates into the notch (888) and is fixedly connected with a first gear (889), a mounting block (12) is rotatably connected to the position of the inner surface of the notch (888) close to the front end, a plurality of groups of second teeth (121) are fixedly connected to the position of the inner surface of the mounting block (12) close to the edge, the mounting block (12) is meshed with the first gears (889) through the second teeth (121), one end of the rotating rod (881) penetrates into the rotating ring (84) and is rotatably connected with the rotating ring, a fixed shaft (122) is fixedly connected to the outer surface of the front end of the mounting block (12), and a second gear (123) is fixedly connected to the outer surface of the fixed shaft (122), and a second rack (124) is meshed with the outer surface of one side of the second gear (123), and the lower end of the second rack (124) is fixedly connected with the base (2).

5. The noise-reducing environment-friendly centrifugal fan according to claim 4, characterized in that: water storage chamber (885) have been seted up to the inside of rotating ring (84), water conservancy diversion chamber (125) have been seted up to the inside of dwang (881), and the internal surface in water conservancy diversion chamber (125) communicates with each other with the internal surface in water storage chamber (885), the internal surface in water conservancy diversion chamber (125) runs through the inside to clearance board (882), and the position that the internal surface in water conservancy diversion chamber (125) and clearance cotton (886) correspond has seted up the apopore.

6. The noise-reducing environment-friendly centrifugal fan according to claim 1, characterized in that: shock-absorbing structure (7) are including fixed column (71) and damping spring (72), mounting groove (73) have been seted up to the upper end surface of base (2), and the bottom fixedly connected with fixed column (71) of mounting groove (73) internal surface, the top of fixed column (71) run through to the inside of casing (9) and rather than swing joint, and the surface of fixed column (71) has cup jointed damping spring (72), damping spring (72)'s both ends respectively with mounting groove (73) and casing (9) surface fixed connection.