A pneumatic clutch

Abstract

The present application discloses a pneumatic clutch, belonging to the technical field of pneumatic clutch, which includes: a clamping member, used to transmit the force to the ball mill; a shell and a force transmission member, which are respectively annular, the force transmission member is embedded in the inner side of the shell, and there is an annular accommodation space between the shell and the force transmission member; an airbag, used to expand or restore the deformation, the airbag is placed in the accommodation space, the two sides and the expanded outer side of the airbag are limited by the shell, on the expanded inner side of the airbag, the airbag can expand toward the direction of the force transmission member and push the force transmission member to act on the clamping member, wherein the two sides of the airbag are respectively thickened, so that the thickness of the two sides of the airbag is respectively greater than the expanded outer side and the expanded inner side. The present application can ensure the stable operation of the equipment, reduce the occurrence of damage, reduce unplanned shutdowns and maintenance, and extend the service life of the pneumatic clutch.

Description

Technical Field

[0001] The present application belongs to the technical field of pneumatic clutches, and in particular, relates to a pneumatic clutch. Background Art

[0002] The pneumatic clutch is a device that transmits power by pushing the friction component with air pressure and releases it with a return spring. In the production of alumina, the pneumatic clutch is mainly used in the operation of the ball mill. Its working principle is to use the compression and release of gas to achieve transmission. In the ball mill, the pneumatic clutch is mainly used to transmit power between the intermediate floating shaft and the pinion shaft of the transmission system. When the pneumatic clutch is in the on state, the gas pressure pushes the brake shoe to make the friction plate and the hub on the shaft fit tightly to increase the friction force to transmit power; when the power needs to be cut off, the gas in the airbag is released, and the brake shoe rebounds, the friction plate and the hub are separated, and the power is cut off.

[0003] In the actual operation of the ball mill, due to the problem of cooperation between the ball mill and the pneumatic clutch, the pneumatic clutch is easily damaged, so that the service life of the pneumatic clutch is getting shorter and shorter, affecting the stability of the equipment operation. The existing technology does not have a good solution to solve the above problem. Utility Model Content

[0004] The present application aims to at least to some extent solve the technical problem that the pneumatic clutch is easily damaged. To this end, the present application provides a pneumatic clutch that can ensure stable operation of the equipment, reduce the occurrence of damage, reduce unplanned shutdowns and maintenance, and extend the service life of the pneumatic clutch.

[0005] The present application provides a pneumatic clutch, which includes:

[0006] The hoop is used to transmit the force to the ball mill;

[0007] The shell and the force transmission member are respectively annular, the force transmission member is embedded in the inner side of the shell, and an annular accommodation space is provided between the shell and the force transmission member;

[0008] The airbag is used to expand or restore deformation. The airbag is placed in the accommodating space. The two sides and the expanded outer side of the airbag are limited by the shell. On the expanded inner side of the airbag, the airbag can expand toward the force transmission part and push the force transmission part to act on the clamp part. The two sides of the airbag are respectively thickened so that the thickness of the two sides of the airbag is respectively greater than the expanded outer side and the expanded inner side.

[0009] In an optional embodiment, the thickness of two sides of the airbag is [1.5, 2] times the thickness of the inflated outer side and the inflated inner side respectively.

[0010] In an alternative embodiment, the airbag has elastic polymer patch layers on both sides.

[0011] In an optional embodiment, a hose is further included for inflating or deflating the airbag, and the hose passes through the shell and is connected to the airbag.

[0012] In an optional embodiment, the housing, the airbag and the force transmission member are regarded as a group of structures, and a plurality of parallel groups of structures are provided in the pneumatic clutch.

[0013] In an optional embodiment, the shell includes a shell ring and side plates, both ends of the shell ring are connected to the side plates respectively, the two side plates are positioned opposite to each other and the airbag is inserted between the two side plates, and the shell ring is limited to the expanded outside of the airbag.

[0014] In an optional embodiment, a star wheel is further included, which is fixed to the side of the side plate. The star wheel has an air flow channel inside, and the air flow channel is connected to the hose.

[0015] In an optional embodiment, the force transmission component includes a reset leaf spring and a torque plate. The reset leaf spring is arranged in the accommodating space, the reset leaf spring is located on the expanded inner side of the airbag, the torque plate is in contact with the reset leaf spring, and the reset leaf spring applies force to the torque plate through the expansion of the airbag.

[0016] In an optional embodiment, the force transmission component further includes a brake shoe, which is mounted on the inner side of the torque plate, and the brake shoe changes size due to the action of the torque plate.

[0017] In an optional embodiment, the force transmission member further includes a friction plate, which is disposed between the brake shoe and the clamping member, and the friction plate acts on the clamping member when the brake shoe applies a force.

[0018] It can be seen from the above technical solution that the beneficial effects of this application are:

[0019] The present application limits the accommodation space between the shell and the force transmission component by the airbag, acts on the force transmission component through the inflation of the airbag, and transmits the force to the ball mill through the clamp. The two sides of the airbag are thickened relative to the expanded outer side and the expanded inner side, so that the two sides of the airbag can withstand the force for a longer time at the contact position with the shell, thereby improving the wear resistance and durability of the airbag. This can ensure stable operation of the equipment, reduce the occurrence of damage, reduce unplanned shutdowns and maintenance, and extend the service life of the pneumatic clutch. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, a brief introduction will be given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other embodiments and drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 A schematic diagram of an embodiment of the pneumatic clutch of the utility model is shown;

[0022] Figure 2 A partial enlarged schematic diagram of an embodiment of the pneumatic clutch of the utility model is shown;

[0023] Figure 3 A partial enlarged schematic diagram of an embodiment of the pneumatic clutch of the utility model is shown;

[0024] Figure numerals: 100, pneumatic clutch; 101, accommodating space; 110, airbag; 111, expanded outer side; 112, expanded inner side; 113, both sides; 120, force transmission component; 121, reset leaf spring; 122, torque plate; 123, brake shoe; 124, friction plate; 130, hub; 140, housing; 141, shell ring; 142, side plate; 150, hose; 160, star wheel; 170, driving shaft; 180, driven shaft; 200, sealing valve; 300, exhaust valve; 310, muffler; 400, hose. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0027] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0029] The present application is described below with reference to the accompanying drawings and specific embodiments:

[0030] Please refer to Figure 1 and Figure 2In an embodiment of the present application, a pneumatic clutch is provided, which includes a hoop, a shell 140, a force transmission member and an airbag 110. The hoop is used to transmit the force to the ball mill. Specifically, the hoop and the driven shaft 180 of the ball mill can be transmitted, such as through gear transmission. The transmission between the hoop and the ball mill is the setting mode of the existing ball mill; the shell 140 and the force transmission member are respectively annular, and the inner side of the shell 140 is concave inward to form a groove, and the width of the force transmission member matches the width of the groove, so that the force The transmission member can close the groove of the shell 140, the force transmission member is embedded in the inner side of the shell 140, and an annular accommodating space 101 is provided between the shell 140 and the force transmission member, that is, the force transmission member maintains a certain interval with the corresponding position in the shell 140, and the force transmission member is stuck between the two inner sides of the shell 140, and the inner side of the force transmission member is in contact with the clamp member; the airbag 110 is used for expansion or recovery of deformation, and the airbag 110 is placed in the accommodating space 101. The airbag 110 is also annular, and its width is slightly smaller than the width of the groove. The airbag 110 can be expanded by inflation and can also be restored to shape by deflating. When the airbag 110 is expanded, it can exert a force on the force transmission member, fix the periphery of the clamp member through the force transmission member, and achieve clamping. When the airbag 110 is deflated, it can restore its shape, so that the airbag 110 no longer acts on the force transmission member, so that the force transmission member is separated from the clamp member, and the power is removed; the two sides 113 of the airbag 110 and the expanded outer side 111 are limited by the shell 140, that is, the airbag 110 is stuck in the groove, and the two sides 113 of the airbag 110 ... 3 and the expanded outer side 111 can contact the inner side wall of the shell 140. At the expanded inner side 112 of the airbag 110, the airbag 110 can expand toward the force transmission part and push the force transmission part to act on the hoop part, that is, the expansion process of the airbag 110; the two sides 113 of the airbag 110 are respectively thickened, so that the thickness of the two sides 113 of the airbag 110 is respectively greater than the expanded outer side 111 and the expanded inner side 112, so that the airbag 110 forms a structure in which the two sides 113 are thick and the expanded outer side 111 and the expanded inner side 112 are relatively thin. During the use of the ball mill, there is a certain instability due to environmental factors. The ball mill acts on the hoop part, and the concentricity of the hoop part also has a certain deviation. In this way, the pneumatic clutch 100 is easily damaged. After increasing the thickness of the two sides 113 of the airbag 110, the airbag 110 is no longer easily damaged, thereby increasing the service life of the pneumatic clutch 100 and extending the service life of the ball mill.

[0031] In the use of the ball mill of the prior art, as the running time increases, the foundation of the ball mill has slight displacements to varying degrees, resulting in increased deviations in the horizontality, verticality, and coaxiality of the ball mill transmission system. When the deviation exceeds the allowable value of the pneumatic clutch 100, the pneumatic clutch 100 cannot cooperate well with the ball mill, resulting in the pneumatic clutch 100 being easily damaged. The damage of the pneumatic clutch 100 first starts from the airbag 110. The airbag 110 is frequently damaged. The reason is that the two sides 113 of the airbag 110 are severely worn, and the wear and damage shortens the service life of the airbag 110. In the present application, the airbag 110 is limited to the accommodation space 101 between the shell 140 and the force transmission member, and the force transmission member is acted on by the inflation of the airbag 110, and the force is transmitted to the ball mill through the clamp. The two sides 113 of the airbag 110 are thickened relative to the expanded outer side 111 and the expanded inner side 112, so that the two sides 113 of the airbag 110 can withstand the force for a longer time at the position in contact with the shell 140, thereby improving the wear resistance and durability of the airbag 110. This can ensure the stable operation of the equipment, reduce the occurrence of damage, reduce unplanned shutdowns and maintenance, and extend the service life of the pneumatic clutch 100. After testing, the pneumatic clutch 100 of the present application has a service life of twice the original one under the same working conditions, and the time for repairing and replacing the airbag 110 is reduced, which is relatively shortened. The time for replacing spare parts is significantly increased, and it is suitable for the operation of equipment with coaxiality deviation.

[0032] In an optional embodiment, the thickness of the two sides 113 of the airbag 110 is [1.5, 2] times the thickness of the expanded outer side 111 and the expanded inner side 112, respectively. For example, the thickness of the expanded outer side 111 and the expanded inner side 112 of the airbag 110 is 2 mm, while the thickness of the two sides 113 of the airbag 110 is 3 mm, 3.5 mm or 4 mm. After repeated testing of the starting clutch, it was found that about 90% of the failures of the pneumatic clutch 100 were caused by wear and leakage of the airbag 110. The reason is that during the expansion or contraction of the airbag 110, in the direction of the expanded outer side 111 and the expanded inner side 112, the contact between the airbag 110 and the shell 140, and the contact between the airbag 110 and the force transmission member is almost unchanged. The main change is in the two sides 113 of the airbag 110. During the expansion of the airbag 110, the two sides 113 of the airbag 110 always interact with the shell 140, and friction will occur between them. During long-term use, this part is easily worn and damaged. After adopting the above thickness setting, the wear resistance of the two sides 113 of the airbag 110 can be significantly enhanced, and the airbag 110 is not easy to rupture, thereby increasing the allowable value of the pneumatic clutch 100. In this way, when the external environment cannot be changed, the ball mill can better cooperate with the pneumatic clutch 100, and by extending the service life of the pneumatic clutch 100, the operation stability of the ball mill is increased, and the service life of the ball mill is extended. In an optional embodiment, the two sides 113 of the airbag 110 have an elastic polymer patch layer, and the elastic polymer patch layer is made of rubber material, that is, a rubber layer, and the rubber layer is located outside or inside the two sides 113 of the airbag 110. In this way, the two sides 113 of the airbag 110 are thickened, which increases the wear resistance and durability of the airbag 110.

[0033] In an optional embodiment, a hose 150 is further included for inflating or deflating the airbag 110 with gas. The hose 150 passes through the shell 140 and is connected to the airbag 110. Specifically, the shell 140 is provided with a through hole. One end of the hose 150 passes through the through hole and enters the accommodating space 101 and is connected to the air hole of the airbag 110. The hose 150 is connected to the airbag 110, and the other end of the hose 150 is connected to the air source. The airbag 110 can be inflated or deflated through the hose 150. Currently, the airbag 110 is directly connected through a hard pipe, and the ball mill will vibrate during use, causing the pneumatic clutch 100 to vibrate accordingly. The hard pipe is easily affected and damaged in a vibrating environment, resulting in the connection with the airbag 110 being prone to failure, such as air leakage. After the hose 150 is adopted, the hose 150 has a certain elasticity. During the vibration of the pneumatic clutch 100, the hose 150 and the connection are not easily affected, thereby increasing the stability of the connection structure of the airbag 110.

[0034] In an optional embodiment, the shell 140, the airbag 110 and the force transmission member are a group of structures, and the pneumatic clutch 100 is provided with multiple parallel groups of structures. For example, the pneumatic clutch 100 is a double-row airbag 110, and is provided with two parallel shells 140. The shells 140 are fixed by welding or screws, so that the shell 140 has two grooves, and the two force transmission members are respectively inserted into them, thus forming two accommodating spaces 101, and each accommodating space 101 is respectively placed with an airbag 110, thus forming a double-row pneumatic clutch 100. In an optional embodiment, the housing 140 includes a housing ring 141 and a side plate 142. The housing ring 141 is an annular member with a certain thickness. The two ends of the housing ring 141 are respectively connected to the side plates 142. The side plates 142 are annular and have a certain width in the radial direction. The two ends of the housing ring 141 are protruded toward the outside of the pneumatic clutch 100 to form an ear structure. The ear structure is provided with a threaded hole, and the side plate 142 is also provided with a threaded hole at a corresponding position. In this way, the housing can be fixed by screws or bolts. The two ends of the ring 141 are respectively connected to a side plate 142, and the shell ring 141 is connected to the outer edge of the side plate 142. The two side plates 142 are positioned opposite to each other and the airbag 110 is inserted between the two side plates 142, that is, an accommodating space 101 is formed between the two side plates 142 and the inner side of the shell ring 141, and the airbag 110 is inserted therein. The shell ring 141 is limited to the expanded outer side 111 of the airbag 110, and the two side plates 142 are respectively limited on both sides 113 of the airbag 110.

[0035] In an optional embodiment, a star wheel 160 is also included, and the star wheel 160 is fixed to the side of the side plate 142. A threaded hole is provided at the outer edge of the star wheel 160, and a corresponding unthreaded hole also begins to be provided at the outer edge of the side plate 142, so that the star wheel 160 and the side plate 142 are fixed by bolts. An air flow channel is provided in the star wheel 160, and the air flow channel is connected to the hose 150. An axial hole is provided at the central axis of the star wheel 160, and a driving shaft 170 is inserted into the axial hole. The outer end of the driving shaft 170 is connected to the pipe fitting, and the driving shaft 170 is also provided with an air hole from the outer end to the middle, and the air hole is connected to the above-mentioned pipe fitting, and a side air hole is provided in the middle position of the driving shaft 170, and the side air hole is from the middle of the driving shaft 170. The center of the air bag 110 extends to the circumferential side, and the edge air holes are connected to the air flow channel set in the star wheel 160, so that the airbag 110 is connected to the pipe through the hose 150 and the air flow channel. One end of the pipe is connected to the rotary sealing valve 200, which can ensure the rotation of the driving shaft 170. The rotary sealing valve 200 is an existing device. The other port of the rotary sealing valve 200 is connected to the exhaust valve 300 through a pipeline. The exhaust valve 300 is also an existing valve. The exhaust valve 300 is connected to a muffler. The muffler adopts a conventional airflow noise reduction device. The other port of the exhaust valve 300 is connected to a hose 400. The hose 400 is connected to the air source, and the opening and closing of the airflow is controlled by the exhaust valve 300.

[0036] Please refer to Figure 3 ,for Figure 1 The enlarged view of the dotted line shows that in an optional embodiment, the force transmission member includes a reset leaf spring 121 and a torque plate 122. The reset leaf spring 121 is used to assist in restoring the airbag 110 to its initial position. The reset leaf spring 121 adopts an existing plate spring. The reset leaf spring 121 is arranged in the accommodating space 101, and its two ends are close to the two sides 113 of the shell 140. One side of the reset leaf spring 121 faces the airbag 110, and the other side faces the torque plate 122. The reset leaf spring 121 is located on the expanded inner side 112 of the airbag 110, and the torque plate 122 contacts the reset leaf spring 121. The torque plate 122 can produce a certain deformation under the action of the reset leaf spring 121, thereby realizing interaction with the clamp member, and the reset leaf spring 121 applies a force to the torque plate 122 through the expansion of the airbag 110. In an optional embodiment, the force transmission component also includes a brake shoe 123, which is installed on the inner side of the torque plate 122. The brake shoe 123 changes its size due to the action of the torque plate 122. The torque plate 122 is annular and has a certain width in the direction 113 on both sides of the shell 140. The two ends of the torque plate 122 are respectively connected to the plate, as shown in the figure. The brake shoe 123 adopts the brake shoe 123 structure of the existing pneumatic clutch 100. The torque plate 122 is deformed under the action of the reset leaf spring 121 and drives the brake shoe 123 to clamp, thereby acting on the clamping member from multiple directions. In an optional embodiment, the force transmission member also includes a friction plate 124, which is arranged between the brake shoe 123 and the clamping member. When the brake shoe 123 applies a force, the friction plate 124 acts on the clamping member. The friction plate 124 surrounds the clamping member, and the outer side of the friction plate 124 contacts the brake shoe 123. The inner side of the friction plate 124 is concave and convex to form a texture, which increases the friction force between the clamping member and the clamping member, and the clamping member is clamped or unloaded through the inner side of the friction plate 124.

[0037] In an optional embodiment, the clamping member is shown in the figure, and has an I-shaped structure and a sleeve connected to the side of the middle of the I-shaped structure. The sleeve is bolted and fixed to the I-shaped structure. The middle of the sleeve is hollow and has a shaft therein. The shaft is the driven shaft 180. The end of the driven shaft 180 is meshed with the rotating shaft of the ball mill through gears, thereby realizing the function between the clamping member and the ball mill.

[0038] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", "optional example" or "optional implementation" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

[0039] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0040] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A pneumatic clutch, characterized in that: include: The hoop is used to transmit the force to the ball mill; The housing (140) and the force transmission member are both annular in shape, the force transmission member is embedded in the inner side of the housing (140), and an annular accommodation space (101) is provided between the housing (140) and the force transmission member; An airbag (110) is used for expansion or deformation recovery. The airbag (110) is placed in the accommodating space (101). The two sides (113) and the expanded outer side (111) of the airbag (110) are limited by the shell (140). On the expanded inner side (112) of the airbag (110), the airbag (110) can expand toward the force transmission component and push the force transmission component to act on the clamp component. The two sides (113) of the airbag (110) are respectively thickened so that the thickness of the two sides (113) of the airbag (110) is respectively greater than the expansion outer side (111) and the expansion inner side (112).

2. The pneumatic clutch according to claim 1, characterized in that: The thickness of the two sides (113) of the airbag (110) is respectively [1.5, 2] times the thickness of the expansion outer side (111) and the expansion inner side (112).

3. The pneumatic clutch according to claim 2, characterized in that: Both sides (113) of the airbag (110) have elastic polymer patch layers.

4. The pneumatic clutch according to claim 1, characterized in that: It also includes a hose (150) for inflating or deflating the airbag (110). The hose (150) passes through the housing (140) and is connected to the airbag (110).

5. The pneumatic clutch according to claim 1, characterized in that: The housing (140), the airbag (110) and the force transmission member serve as a group of structures, and the pneumatic clutch is provided with a plurality of groups of structures arranged in parallel.

6. The pneumatic clutch according to claim 4, characterized in that: The shell (140) comprises a shell ring (141) and a side plate (142), the two ends of the shell ring (141) are respectively connected to the side plates (142), the two side plates (142) are positioned opposite to each other and the airbag (110) is inserted between the two side plates (142), and the shell ring (141) is limited to the expansion outer side (111) of the airbag (110).

7. The pneumatic clutch according to claim 6, characterized in that: It also includes a star wheel (160), the star wheel (160) is fixed to the side of the side plate (142), and an air flow channel is provided in the star wheel (160), and the air flow channel is connected to the hose (150).

8. The pneumatic clutch according to claim 1, characterized in that: The force transmission component comprises a reset leaf spring (121) and a torque plate (122); the reset leaf spring (121) is arranged in the accommodating space (101); the reset leaf spring (121) is located on the expanded inner side (112) of the airbag (110); the torque plate (122) is in contact with the reset leaf spring (121); and the reset leaf spring (121) applies a force to the torque plate (122) through the expansion of the airbag (110).

9. The pneumatic clutch according to claim 8, characterized in that: The force transmission component further comprises a brake shoe (123), wherein the brake shoe (123) is mounted on the inner side of the torque plate (122), and the size of the brake shoe (123) is changed by the action of the torque plate (122).

10. The pneumatic clutch according to claim 9, characterized in that: The force transmission component further comprises a friction plate (124), wherein the friction plate (124) is arranged between the brake shoe (123) and the clamping member, and the friction plate (124) acts on the clamping member when the brake shoe (123) applies a force.

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