Ventilation vortex temperature adjusting device

Abstract

The invention discloses a ventilation vortex temperature adjusting device. Comprising a fan, a heat exchange mesh enclosure arranged at an air inlet of the fan, a fixed seat fixedly mounted on the outer surface of the heat exchange mesh enclosure, a heat exchange coil pipe arranged in a cavity in the heat exchange mesh enclosure, a circulating pipe matched with the heat exchange coil pipe to form circulation, and a circulating module matched with the circulating pipe and the heat exchange coil pipe for use to meet the heat exchange requirement. According to the ventilation vortex temperature adjusting device, the heat exchange net cover is installed at the air inlet of the draught fan, spiral airflow can be formed through the heat exchange net cover, the penetrating power of the airflow can be increased through the effect of the spiral airflow, the temperature and humidity of air in a place can be more evenly distributed, and the ventilation vortex temperature adjusting device can be used for adjusting the temperature and humidity of the air in the place. And moreover, a circulating module, a circulating pipe and a heat exchange coil pipe are additionally arranged, so that the heat exchange effect of the whole device is improved, and the ventilation and temperature adjustment effects of the whole device are further guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of ventilation, cooling and dehumidification equipment, and in particular to a ventilation vortex temperature regulating device. Background Art

[0002] In order to solve the problem that workers in large enclosed spaces such as cargo holds and workshops cannot obtain a comfortable physical experience without significantly increasing economic expenses by simply relying on axial flow mechanical ventilation equipment for ventilation in temperature and humidity environments, we proposed a ventilation vortex temperature control device. Summary of the invention

[0003] The object of the present invention is to provide a ventilation vortex temperature control device to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a ventilation vortex temperature control device, comprising a fan, a heat exchange mesh cover set up at the air inlet of the fan, a fixing seat fixedly installed on the outer surface of the heat exchange mesh cover, a heat exchange coil set up in the inner cavity of the heat exchange mesh cover, a circulation pipe that cooperates with the heat exchange coil to form a circulation, and a circulation module that cooperates with the circulation pipe and the heat exchange coil to meet the heat exchange requirements; the fixing seat is provided with a connecting assembly and an auxiliary assembly, and the connecting assembly includes a connecting seat fixedly installed on the side of the fixing seat, a first threaded barrel that can be threadedly connected to the circulation pipe, a second threaded barrel fixedly installed on the outer surface of the first threaded barrel, an auxiliary nut fixedly installed on the side wall of the inner cavity of the connecting seat, a sliding rod slidably connected to the first threaded barrel, a connecting ring fixedly connected to the end of the sliding rod away from the first threaded barrel, and a first bearing that realizes the rotational connection between the connecting ring and the connecting seat; the The auxiliary component includes a columnar head arranged on the side of the connecting seat, a slider slidably arranged on the columnar head, an adjusting ring arranged on the outside of the columnar head, a transmission shaft rotatably arranged on the fixed seat and fixedly connected to the columnar head, a pulley group for realizing transmission connection between the transmission shaft and the connecting ring, a screw rotatably arranged inside the columnar head, a first bevel gear fixedly installed on the end of the screw, an auxiliary shaft rotatably arranged inside the columnar head, a second bevel gear fixedly installed at one end of the auxiliary shaft, a driven gear fixedly installed at the other end of the auxiliary shaft, an active gear ring fixedly connected to the adjusting ring, and a second bearing for realizing rotational connection between the active gear ring and the columnar head; a stop assembly is arranged on the transmission shaft, and the stop assembly includes a movable rod slidably arranged on the transmission shaft, a connecting rod fixedly connected to the movable rod, a friction ring fixedly connected to the end of the connecting rod, and a return spring fixedly connected to the connecting rod and the transmission shaft at both ends respectively.

[0005] Preferably, the circulation module includes a box, a compressor, a condenser, an expansion valve, a micro pump, and an atomizing nozzle. A heat exchange coil is also provided inside the box. The heat exchange coil is connected to the heat exchange coil through the circulation pipe to form a circulation system. The atomizing nozzle is used to atomize and spray the propylene glycol solution into the inside of the box.

[0006] Preferably, an annular baffle is provided on the heat exchange mesh cover to form an inner duct and an outer duct, a first spoiler is provided on the inner duct, and a second spoiler is also provided on the outer duct, and the density of the first spoiler is less than that of the second spoiler.

[0007] Preferably, the inner wall of the first threaded barrel is provided with a first thread, the outer wall of the second threaded barrel is provided with a second thread, and the second threaded barrel is threadably connected to the auxiliary nut via the second thread.

[0008] Preferably, the circulation pipe is plugged into the connection seat, and the interface end of the heat exchange coil used for connecting to the circulation pipe is located inside the connection seat.

[0009] Preferably, the first bearing includes a first inner ring structure, a first outer ring structure and a first center ball layer, the first inner ring structure is fixedly connected to the connecting ring, the first outer ring structure is fixedly connected to the connecting seat, and the first center ball layer is arranged between the first inner ring structure and the first outer ring structure.

[0010] Preferably, the second bearing includes a second inner ring structure, a second outer ring structure and a second center ball layer, the second inner ring structure is fixedly connected to the columnar head, the second outer ring structure is fixedly connected to the active gear ring, and the second center ball layer is arranged between the second inner ring structure and the second outer ring structure.

[0011] Preferably, the slider is threadedly connected to the screw, the first bevel gear and the second bevel gear are both arranged in the internal cavity of the columnar head, and the first bevel gear and the second bevel gear are meshingly connected, and the driven gear is meshingly connected to the driving ring gear.

[0012] Preferably, the transmission shaft is provided with sliding grooves for passing through both ends of the connecting rod, the end of the movable rod away from the friction ring is located inside the hexagonal socket of the columnar head, and the side of the friction ring is provided with friction patterns for enhancing the friction between the fixing seat.

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

[0014] 1. The present invention installs the heat exchange mesh cover at the air inlet of the fan, and can use the heat exchange mesh cover to form a spiral airflow. The effect of the spiral airflow can not only increase the penetration of the airflow, but also make the air temperature and humidity in the premises more evenly distributed, and achieve low power consumption and high benefits in energy saving and environmental protection. In addition, a circulation module, a circulation pipe and a heat exchange coil are added to improve the heat exchange effect of the overall device, and further ensure the ventilation and temperature control effect of the overall device.

[0015] 2. The present invention simplifies the connection steps between the circulation pipe and the heat exchange coil in the heat exchange mesh cover by establishing components such as a circulation module, an auxiliary component and a stop component, so that subsequent users can quickly remove and clean the heat exchange mesh cover, further improving the use efficiency of the entire device, and the auxiliary component can also be adapted to different types of wrenches to cope with different actual usage scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0017] Figure 2 It is a schematic cross-sectional view of the heat exchange mesh cover structure of the present invention;

[0018] Figure 3 It is a schematic cross-sectional view of the first partial structure of the present invention;

[0019] Figure 4 for Figure 3 A schematic diagram of the structure enlargement in the middle;

[0020] Figure 5 It is a schematic cross-sectional view of the connecting seat structure of the present invention;

[0021] Figure 6 It is a schematic cross-sectional view of a second partial structure of the present invention;

[0022] Figure 7 for Figure 6 A magnified schematic diagram of the structure at B in the middle;

[0023] Figure 8 It is an exploded view of the stop assembly structure of the present invention;

[0024] Fig. 9 It is an exploded view of the auxiliary component part of the present invention;

[0025] Fig.10 for Fig. 9 Enlarged schematic diagram of the structure at point C in the middle.

[0026] In the figure: 1. fan; 2. heat exchange mesh cover; 3. fixing seat; 4. connecting assembly; 41. connecting seat; 42. first threaded tube; 43. second threaded tube; 44. auxiliary nut; 45. sliding rod; 46. connecting ring; 47. first bearing; 5. circulation pipe; 6. circulation module; 7. auxiliary assembly; 71. columnar head; 72. sliding block; 73. adjusting ring; 74. pulley set; 75. transmission shaft; 76. screw; 77. first bevel gear; 78. second bevel gear; 79. auxiliary shaft; 710. driven gear; 711. driving gear ring; 712. second bearing; 8. heat exchange coil; 9. stop assembly; 91. movable rod; 92. return spring; 93. connecting rod; 94. friction ring. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figure 1-10The present invention provides a technical solution: a ventilation vortex temperature control device, comprising a fan 1, a heat exchange mesh cover 2 set at the air inlet of the fan 1, a fixing seat 3 fixedly installed on the outer surface of the heat exchange mesh cover 2, a heat exchange coil 8 set at the inner cavity of the heat exchange mesh cover 2, a circulation pipe 5 that cooperates with the heat exchange coil 8 to form a circulation, and a circulation module 6 that cooperates with the circulation pipe 5 and the heat exchange coil 8 to meet the heat exchange demand; the circulation module 6 includes a box, a compressor, a condenser, an expansion valve, a micro pump, and an atomizing nozzle. A heat exchange coil is also arranged inside the box. The heat exchange coil is connected to the heat exchange coil 8 through the circulation pipe 5 to form a circulation system. The atomizing nozzle is used to spray a propylene glycol solution into the box, and a large number of atomized particles are generated by the impact of 10-micron particles of the propylene glycol solution. The particles are fully combined with the heat exchange coil for heat exchange, and the atomized particles are cooled or heated by the heat exchange coil. The coil is resupplied to the heat exchange coil 8 inside the heat exchange mesh cover 2 and exchanges heat with the air. Fully exchange heat, and then return to the box body, it can not only adjust the temperature effect by the size of the water flow of the water mist, maintain the constant operation of the compressor and the expansion valve, and increase the service life of the equipment; it can also reduce the use of thermal insulation, and the overcooled or overheated heat exchange coil is directly in contact with the air, causing unnecessary cold or heat loss. An annular baffle is arranged on the heat exchange mesh cover 2 to form an inner duct and an outer duct. The inner duct is provided with a first spoiler, and the outer duct is also provided with a second spoiler. The density of the first spoiler is less than that of the second spoiler. The airflow passes through the heat exchange mesh cover 2 at the air inlet of the fan 1, and then passes through the second spoiler. The outer ring of the annular baffle has a small gap and a fast air flow rate to form an outer duct, and the inner ring of the annular baffle forms an inner duct. Since the airflow speed of the outer duct is large and there is a tangent angle with the airflow of the inner duct, the air in the inner duct is driven to rotate counterclockwise during the forward process, and finally a spiral airflow is formed. The effect of the spiral airflow can increase the penetration of the airflow.

[0029] The fixing seat 3 is provided with a connecting assembly 4 and an auxiliary assembly 7. The connecting assembly 4 includes a connecting seat 41 fixedly mounted on the side of the fixing seat 3, a first threaded barrel 42 which can be threadedly connected to the circulation pipe 5, a second threaded barrel 43 fixedly mounted on the outer surface of the first threaded barrel 42, an auxiliary nut 44 fixedly mounted on the side wall of the inner cavity of the connecting seat 41, a sliding rod 45 slidably connected to the first threaded barrel 42, a connecting ring 46 fixedly connected to the end of the sliding rod 45 away from the first threaded barrel 42, and a first bearing 47 for realizing the rotational connection between the connecting ring 46 and the connecting seat 41; the inner wall of the first threaded barrel 42 is provided with a first threaded barrel 43; the second threaded barrel 43 is fixedly mounted on the outer surface of the first threaded barrel 42; the auxiliary nut 44 fixedly mounted on the inner cavity side wall of the connecting seat 41; ... The outer wall of the second threaded barrel 43 is provided with a second thread, and the second threaded barrel 43 is threadedly connected to the auxiliary nut 44 through the second thread, the circulation pipe 5 is plugged into the connecting seat 41, and the interface end of the heat exchange coil 8 used to connect the circulation pipe 5 is located inside the connecting seat 41, and the first bearing 47 includes a first inner ring structure, a first outer ring structure and a first center ball layer, the first inner ring structure is fixedly connected to the connecting ring 46, the first outer ring structure is fixedly connected to the connecting seat 41, and the first center ball layer is arranged between the first inner ring structure and the first outer ring structure, ensuring the flexibility of the overall structural design to meet actual use requirements.

[0030] The auxiliary component 7 includes a columnar head 71 arranged on the side of the connecting seat 41, a slider 72 slidably arranged on the columnar head 71, an adjusting ring 73 arranged on the outside of the columnar head 71, a transmission shaft 75 rotatably arranged on the fixing seat 3 and fixedly connected to the columnar head 71, a pulley group 74 for realizing transmission connection between the transmission shaft 75 and the connecting ring 46, a screw rod 76 rotatably arranged inside the columnar head 71, a first bevel gear 77 fixedly installed at the end of the screw rod 76, an auxiliary shaft 79 also rotatably arranged inside the columnar head 71, a second bevel gear 78 fixedly installed at one end of the auxiliary shaft 79, a driven gear 710 fixedly installed at the other end of the auxiliary shaft 79, an active gear ring 711 fixedly connected to the adjusting ring 73, and a pulley group 74 for realizing transmission connection between the active gear ring 711 and the columnar head 7 The second bearing 712 is rotatably connected to the cylindrical head 71; the second bearing 712 includes a second inner ring structure, a second outer ring structure and a second central ball layer, the second inner ring structure is fixedly connected to the cylindrical head 71, the second outer ring structure is fixedly connected to the active gear ring 711, the second central ball layer is arranged between the second inner ring structure and the second outer ring structure, the slider 72 is threadedly connected to the screw 76, the first bevel gear 77 and the second bevel gear 78 are both arranged in the inner cavity of the cylindrical head 71, and the first bevel gear 77 and the second bevel gear 78 are meshed and connected, the driven gear 710 is meshed and connected to the active gear ring 711, so that after the active gear ring 711 rotates, it can drive multiple driven gears 710 to rotate synchronously, thereby simplifying the operation steps of the overall device and improving the actual use efficiency.

[0031] A stop assembly 9 is provided on the transmission shaft 75, and the stop assembly 9 includes a movable rod 91 slidably set on the transmission shaft 75, a connecting rod 93 fixedly connected to the movable rod 91, a friction ring 94 fixedly connected to the end of the connecting rod 93, and a return spring 92 whose two ends are respectively fixedly connected to the connecting rod 93 and the transmission shaft 75. A sliding groove for passing through the two ends of the connecting rod 93 is opened on the transmission shaft 75, and the end of the movable rod 91 away from the friction ring 94 is located inside the hexagonal socket of the columnar head 71. The side of the friction ring 94 is provided with a friction pattern for enhancing the friction between the fixed seat 3.

[0032] When the heat exchange mesh cover 2 is removed and the connection between the heat exchange coil 8 and the circulation pipe 5 in the heat exchange mesh cover 2 is released, a hexagonal wrench is inserted into the columnar head 71, and the movable rod 91 inside the columnar head 71 is squeezed and slides inside the transmission shaft 75. At this time, the friction ring 94 fixedly connected to the movable rod 91 through the connecting rod 93 slides synchronously, so that a gap is generated between the friction ring 94 and the fixed seat 3 fixed on the side of the heat exchange mesh cover 2, and the columnar head 71 can be driven to rotate by a wrench, and the transmission shaft 75 fixedly connected to the columnar head 71 rotates synchronously on the fixed seat 3 because it is fixed on the fixed seat 3. The connection seat 41 is rotatably connected to the connection ring 46 through the first bearing 47, and the connection ring 46 is connected to the transmission shaft 75 by the pulley set 74, so the connection ring 46 will rotate with the rotation of the slider 72, and the two slide rods 45 fixed on the connection ring 46 are in a sliding connection relationship with the first threaded tube 42, and the second threaded tube 43 is fixed on the outer surface of the first threaded tube 42, and the second threaded tube 43 is threadedly connected to the auxiliary nut 44 fixed on the side wall of the inner cavity of the connection seat 41, so after the connection ring 46 rotates, the second threaded tube 43 and the first threaded tube 42 will rotate The heat exchange coil 8 is inserted into the heat exchange coil 8, and the threads on the inner wall of the first threaded barrel 42 gradually disengage from the threads on the circulation pipe 5, so that the circulation pipe 5 can be removed from the connecting seat 41, and the connection between the circulation pipe 5 and the heat exchange coil 8 is released, and the two connecting rings 46 are respectively connected to the transmission shaft 75 through the two pulley sets 74. When the transmission shaft 75 rotates, the two connecting rings 46 inside the connecting seat 41 rotate synchronously, thereby changing the states of the two first threaded barrels 42 at the same time, and the two circulation pipes 5 can be removed at the same time. Then, the wrench is pulled out, and the two ends are respectively connected to the transmission shaft 75 and the connecting rod 93. Under the action of the positioning spring 92, the connecting rod 93 is pushed to slide to eliminate the gap between the friction ring 94 and the fixed seat 3, so that the friction ring 94 is in close contact with the fixed seat 3, and then the friction pattern on the friction ring 94 cooperates with the fixed seat 3 to generate a certain friction force. Under the limitation of this friction force, the rotation of the friction ring 94 and even the transmission shaft 75 can be limited, and then the state of the pulley group 74, the connecting ring 46 and the first threaded cylinder 42 is locked to ensure that the circulation pipe 5 is firmly connected to the connecting seat 41 by using the first threaded cylinder 42 in the future, so that the circulation pipe 5 and the heat exchange coil 8 can form a circulatory heat exchange pipe;When the model does not match the initial hole of the columnar head 71, the adjusting ring 73 is rotated, and the active ring gear 711 rotatably connected to the columnar head 71 by the second bearing 712 is fixedly connected to the adjusting ring 73. The active ring gear 711 will rotate with the rotation of the adjusting ring 73. The active ring gear 711 is meshed with the driven gear 710 at the end of the six auxiliary shafts 79. The other end of the auxiliary shaft 79 is fixed with the second bevel gear 78 meshed with the first bevel gear 77. The first bevel gear 77 is fixedly set On the screw rod 76, the screw rod 76 is in a rotatable state on the columnar head 71, and the screw rod 76 is also threadedly connected with the slider 72 slidably set inside the columnar head 71. Therefore, when the active gear ring 711 rotates, the six screw rods 76 rotate synchronously under the transmission of the driven gear 710, the auxiliary shaft 79, the second bevel gear 78 and the first bevel gear 77, thereby driving the six sliders 72 to slide inside the columnar head 71 to change the size of the hexagonal socket on the columnar head 71, which is suitable for the plug-in requirements of different types of wrenches. ;

[0033] 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.

[0034] 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. Ventilation vortex temperature control device, characterized in that: The invention comprises a fan (1), a heat exchange mesh cover (2) arranged at the air inlet of the fan (1), a fixing seat (3) fixedly mounted on the outer surface of the heat exchange mesh cover (2), a heat exchange coil (8) arranged in the inner cavity of the heat exchange mesh cover (2), a circulation pipe (5) which cooperates with the heat exchange coil (8) to form a circulation, and a circulation module (6) which cooperates with the circulation pipe (5) and the heat exchange coil (8) to meet the heat exchange demand; The fixing seat (3) is provided with a connecting assembly (4) and an auxiliary assembly (7), wherein the connecting assembly (4) comprises a connecting seat (41) fixedly mounted on a side surface of the fixing seat (3), a first threaded barrel (42) threadably connected to the circulation pipe (5), a second threaded barrel (43) fixedly mounted on an outer surface of the first threaded barrel (42), an auxiliary nut (44) fixedly mounted on a side wall of an inner cavity of the connecting seat (41), a sliding rod (45) slidably connected to the first threaded barrel (42), a connecting ring (46) fixedly connected to an end of the sliding rod (45) away from the first threaded barrel (42), and a first bearing (47) for realizing a rotatable connection between the connecting ring (46) and the connecting seat (41); The auxiliary component (7) comprises a columnar head (71) arranged on the side of the connecting seat (41), a slider (72) slidably arranged on the columnar head (71), an adjusting ring (73) arranged on the outside of the columnar head (71), a transmission shaft (75) rotatably arranged on the fixing seat (3) and fixedly connected to the columnar head (71), a pulley group (74) for realizing transmission connection between the transmission shaft (75) and the connecting ring (46), a screw (76) rotatably arranged inside the columnar head (71), a first bevel gear (77) fixedly mounted on the end of the screw (76), an auxiliary shaft (79) rotatably arranged inside the columnar head (71), a second bevel gear (78) fixedly mounted on one end of the auxiliary shaft (79), a driven gear (710) fixedly mounted on the other end of the auxiliary shaft (79), an active gear ring (711) fixedly connected to the adjusting ring (73), and a second bearing (712) for realizing rotational connection between the active gear ring (711) and the columnar head (71); The transmission shaft (75) is provided with a stop assembly (9), and the stop assembly (9) comprises a movable rod (91) slidably arranged on the transmission shaft (75), a connecting rod (93) fixedly connected to the movable rod (91), a friction ring (94) fixedly connected to the end of the connecting rod (93), and a return spring (92) with two ends respectively fixedly connected to the connecting rod (93) and the transmission shaft (75).

2. The ventilation vortex temperature control device according to claim 1, characterized in that: The circulation module (6) comprises a housing, a compressor, a condenser, an expansion valve, a micro pump, and an atomizing nozzle. A heat exchange coil is also provided inside the housing. The heat exchange coil is connected to the heat exchange coil (8) via the circulation pipe (5) to form a circulation system. The atomizing nozzle is used to atomize and spray the propylene glycol solution into the interior of the housing.

3. The ventilation vortex temperature control device according to claim 1, characterized in that: The heat exchange mesh cover (2) is provided with an annular baffle to form an inner duct and an outer duct, the inner duct is provided with a first spoiler, and the outer duct is also provided with a second spoiler, and the density of the first spoiler is less than the density of the second spoiler.

4. The ventilation vortex temperature control device according to claim 1, characterized in that: The inner wall of the first threaded barrel (42) is provided with a first thread, the outer wall of the second threaded barrel (43) is provided with a second thread, and the second threaded barrel (43) is threadedly connected to the auxiliary nut (44) via the second thread.

5. The ventilation vortex temperature control device according to claim 1, characterized in that: The circulation pipe (5) is plugged into the connection seat (41), and the interface end of the heat exchange coil (8) used for connecting to the circulation pipe (5) is located inside the connection seat (41).

6. The ventilation vortex temperature control device according to claim 1, characterized in that: The first bearing (47) includes a first inner ring structure, a first outer ring structure and a first central ball layer, the first inner ring structure is fixedly connected to a connecting ring (46), the first outer ring structure is fixedly connected to a connecting seat (41), and the first central ball layer is arranged between the first inner ring structure and the first outer ring structure.

7. The ventilation vortex temperature control device according to claim 1, characterized in that: The second bearing (712) includes a second inner ring structure, a second outer ring structure and a second center ball layer, the second inner ring structure is fixedly connected to the columnar head (71), the second outer ring structure is fixedly connected to the active gear ring (711), and the second center ball layer is arranged between the second inner ring structure and the second outer ring structure.

8. The ventilation vortex temperature control device according to claim 1, characterized in that: The slider (72) is threadedly connected to the screw rod (76); the first bevel gear (77) and the second bevel gear (78) are both arranged in the inner cavity of the columnar head (71); the first bevel gear (77) and the second bevel gear (78) are meshingly connected to each other for transmission; and the driven gear (710) is meshingly connected to the driving gear ring (711).

9. The ventilation vortex temperature control device according to claim 1, characterized in that: The transmission shaft (75) is provided with sliding grooves for passing through the two ends of the connecting rod (93); the end of the movable rod (91) away from the friction ring (94) is located inside the hexagonal socket of the columnar head (71); and the side surface of the friction ring (94) is provided with friction patterns for enhancing the friction force between the fixed seat (3).

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