An expansion type clutch rubber airbag

Abstract

The utility model relates to a clutch technology field, specifically to an expansion clutch rubber airbag. It includes an inner ring, which is located between a shaft tube and a drum wheel, and is detachably fixed and sealed to the outside of the shaft tube. An airbag ring is fixed on the outside of the inner ring, and a plurality of through holes are evenly distributed on the circumference of the inner ring. A retaining ring is fixed on the shaft tube on one side of the inner ring, and a plug rod concentric with the through hole is fixed on the retaining ring, and the plug rod is inserted in the through hole. A plurality of arc-shaped protrusions are evenly distributed on the circumference of the outer edge of the airbag ring, and a groove is provided on the outside of the protrusion, and an arc-shaped friction block is installed in the groove. Both ends of the protrusion and the two ends of the friction block are fixedly connected by screws, and the shaft tube is connected to the airbag ring. By arranging a plurality of elastic joints in the airbag ring, when the airbag ring is deformed during the power transmission process, the deformation of the airbag ring can be reduced under the action of the joints, and the service life of the airbag ring can be increased, and the torque that the airbag ring can withstand is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of a clutch, in particular to an expansion type clutch rubber airbag. Background Art

[0002] The expansion clutch is also called the pneumatic clutch. The pneumatic clutch is a friction clutch powered by compressed air. It has the advantages of smooth clutch, vibration absorption, compact structure, automatic compensation of wear clearance, and convenient maintenance. The existing pneumatic clutch installation and disassembly operations are relatively complicated.

[0003] The patent document with application number CN202020739661.7 discloses an expanding clutch rubber airbag, including an annular airbag body and a friction plate. The rubber airbag is usually used in conjunction with an active drum wheel. A T-slot is provided on the outer side of the active drum wheel. The extension direction of a single T-slot is arranged along the axial direction, and each T-slot is arranged circumferentially; an air port is provided on the airbag body, and a connecting layer is fixedly connected to the inner side of the airbag body. A T-shaped plug matching the T-slot is provided on the inner wall of the connecting layer. When installing, only the T-shaped plug needs to be inserted into the T-slot, and the rubber airbag can be fixedly connected to the active drum wheel. The operation is simple and the disassembly is convenient, which is convenient for the inspection and maintenance of the rubber airbag. and replacement; several friction layers are evenly arranged on the outside of the airbag body, and two layers of inner and outer tension springs are fixedly connected between adjacent friction layers, and each layer is evenly arranged with three tension springs. The tension springs can quickly reset the friction plate when the rubber airbag is deflated; a T-shaped groove is arranged on the outer wall of the friction layer, and the extension direction of a single T-shaped groove is arranged along the axial direction, and each T-shaped groove is arranged around the circumference. A T-shaped slider matching the T-shaped groove is arranged on the inner wall of the friction plate. When installing, the T-shaped slider is inserted into the T-shaped groove, and the friction plate fits tightly with the friction layer. When the friction plate is severely worn, only the corresponding friction plate needs to be replaced, and there is no need to replace the entire rubber airbag, which reduces maintenance costs. In order to facilitate disassembly, the clutch rubber airbag needs to be provided with a T-shaped slot matching the T-shaped plug on the inner wall of the connecting layer on the outside of the active drum, so the production cost of the active drum is increased.

[0004] The patent document with application number CN201820915682.2 discloses a pneumatic clutch rubber airbag, in which the airbag body and the clutch body are arranged to be connected by a snap-fit ​​connection, which is simple and convenient, and the installation is compact and strong. At the same time, a limit plate is arranged on the outside of the clutch body to avoid the airbag body and the clutch body from being disconnected when the device is used as a whole after being installed. After the air pressure in the clutch rubber airbag increases, the friction block presses the drum wheel. In the process of transmitting power, the rubber airbag can be deformed, so the pneumatic clutch can absorb the vibration in the process of power transmission. However, when the rotation resistance of the drum wheel is large, the deformation of the rubber airbag is large in the process of power being transmitted to the drum wheel through the pneumatic clutch, and the rubber airbag is easily damaged. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide an expanding clutch rubber airbag which can prolong the service life and is convenient for assembly and disassembly.

[0006] In order to achieve the above purpose, the technical solution provided by the utility model is:

[0007] A rubber airbag of an expanding clutch comprises an inner ring, which is located between a shaft tube and a drum wheel. The inner ring is detachably fixed and sealed to the outside of the shaft tube, an airbag ring is sleeved and fixed to the outside of the inner ring, a plurality of through holes are evenly distributed on the circumference of the inner ring, the axis of the through holes is parallel to the axis of the shaft tube, a retaining ring is fixed to the shaft tube on one side of the inner ring, a plug rod concentric with the through hole is fixed to the retaining ring, the plug rod is inserted into the through hole, a plurality of arc-shaped protrusions are evenly distributed on the circumference of the outer edge of the airbag ring, a groove is provided on the outside of the protrusion, an arc-shaped friction block is installed in the groove, both ends of the protrusion are fixedly connected to both ends of the friction block by screws, a plurality of connecting bands are evenly distributed on the inner circumference of the airbag ring, one end of the connecting band is fixed to the outer edge wall of the airbag ring, and the other end of the connecting band is fixed to the inner edge wall of the airbag ring, and the shaft tube is connected to the airbag ring.

[0008] Specifically, the inner edge of the inner ring is fixedly and sealingly connected with a rubber ring, and the inner ring is sealingly connected to the shaft tube through the rubber ring.

[0009] Specifically, the shaft tube is provided with an air hole, the rubber ring is provided with a slot hole connected to the air hole, the inner ring is provided with an opening connected to the slot hole, and the inner edge wall of the airbag ring is provided with an inlet hole connected to the opening hole.

[0010] Specifically, annular flanges are provided on both sides of the outer edge of the inner ring, the inner side of the airbag ring is located between the two flanges, and the inner side of the airbag ring is fixedly connected to the flanges.

[0011] Specifically, the connecting belt is elastic, and the connecting belt and the airbag ring are integrally formed.

[0012] Specifically, the airbag ring and the protrusion are integrally formed.

[0013] Specifically, both ends of the protrusion are provided with stepped holes, and the screws penetrate the stepped holes and are threadedly connected with the friction block.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. By arranging a plurality of elastic linkages in the airbag ring, when the airbag ring is deformed during the power transmission process, the deformation of the airbag ring can be reduced under the action of the linkages, the service life of the airbag ring can be increased, and the torque that the airbag ring can withstand is increased.

[0016] 2. The inner ring and the shaft tube are connected by fixing the retaining ring on the retaining ring and the insert rod, and the insert rod is inserted into the through hole of the inner ring, so as to facilitate the installation of the fixed connection between the inner ring and the shaft tube.

[0017] 3. After the friction block is worn, it is convenient to replace it.

[0018] 4. By arranging a flange on the inner ring and fixing the inner side of the airbag ring to the flange, the fixing area of ​​the airbag ring can be increased and the stability of the airbag ring can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the cooperation between the airbag ring and the inner ring.

[0020] Figure 2 It is a front view of the airbag and the inner ring.

[0021] Figure 3 for Figure 2 AA section view.

[0022] Figure 4 This is a cross-sectional view after the inner ring is installed in the shaft tube.

[0023] Figure 5 Schematic diagram of the retaining ring on the shaft.

[0024] The names of the parts in the attached drawings are:

[0025] 1 Inner ring

[0026] 2 Rubber rings

[0027] 3 Through holes

[0028] 4 Airbag ring

[0029] 5 Bump

[0030] 6 Friction Block

[0031] 7 Joint

[0032] 8 Axis tube

[0033] 9. Stoma

[0034] 10 Retaining ring

[0035] 11 Insert the rod

[0036] 12 Drum

[0037] 101 flange 102 opening DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0039] Example 1: Reference Figure 1-Figure 5 As shown, an expansion clutch rubber airbag includes an inner ring 1, which is located between a shaft tube 8 and a drum wheel 12. The inner ring 1 is detachably fixed and sealed to the outside of the shaft tube 8. An airbag ring 4 is fixedly sleeved on the outside of the inner ring 1, and the shaft tube 8 is connected to the airbag ring 4.

[0040] Specifically, the inner edge of the inner ring 1 is fixedly sealed with a rubber ring 2, and the inner ring 1 is sealed with the shaft tube 8 through the rubber ring 2. The shaft tube 8 is provided with an air hole 9, the rubber ring 2 is provided with a slot hole connected to the air hole 9, the inner ring 1 is provided with an opening 102 connected to the slot hole, and the inner edge wall of the airbag ring 4 is provided with an inlet hole connected to the opening 102. The high-pressure gas in the shaft tube 8 can enter the airbag ring 4 through the air hole 9, the slot hole, the opening 102 and the inlet hole in sequence.

[0041] A plurality of through holes 3 are evenly distributed on the inner ring 1, and the axis of the through holes 3 is parallel to the axis of the shaft tube 8. A retaining ring 10 is fixed to the shaft tube 8 on one side of the inner ring 1, and a plug rod 11 concentric with the through hole 3 is fixed to the retaining ring 10, and the plug rod 11 is inserted into the through hole 3. The inner ring 1 is sleeved on the shaft tube 8, and the plug rod 11 is inserted into the through hole 3 to realize the connection between the inner ring 1 and the shaft tube 8. When the shaft tube 8 rotates, the retaining ring 10, the plug rod 11 and the inner ring 1 rotate together.

[0042] A plurality of arc-shaped protrusions 5 are evenly distributed and fixed on the circumference of the outer edge of the airbag ring 4, and the airbag ring 4 and the protrusions 5 are integrally formed. A groove is provided on the outer side of the protrusion 5, and an arc-shaped friction block 6 is installed in the groove. Both ends of the protrusion 5 and both ends of the friction block 6 are fixedly connected by screws. Specifically, both ends of the protrusion 5 are provided with stepped holes, and the screws penetrate the stepped holes and are threadedly connected with the friction block 6. When the friction block 6 needs to be replaced, the screws at both ends of the protrusion 5 are removed, and then the old friction block 6 can be pulled out of the groove of the protrusion 5. The friction block 6 is easy to replace.

[0043] Annular flanges 101 are provided on both sides of the outer edge of the inner ring 1, the inner side of the airbag ring 4 is located between the two flanges 101, and the inner side of the airbag ring 4 is fixedly connected to the flanges 101. By providing the flanges 101 and the inner side of the airbag ring 4 is fixedly connected to the flanges 101, the fixing area of ​​the airbag ring 4 can be increased, and the stability of the airbag ring 4 can be improved after the airbag ring 4 is installed.

[0044] When installing the inner ring 1, the air hole 9 is made to correspond to the opening 102, and then the inner ring 1 is sleeved on the shaft tube 8 and the insertion rod 11 is inserted into the through hole 3. Then the screw sleeve is threadedly connected to the shaft tube 8 so that the screw sleeve and the retaining ring 10 are tightly against the inner ring 1, thereby completing the installation of the inner ring 1.

[0045] During operation, the high-pressure gas in the shaft tube 8 can enter the airbag ring 4 through the air hole 9, the slot hole, the opening 102 and the inlet hole in sequence. After the airbag ring 4 expands, the friction block 6 contacts the drum wheel 12, and the shaft tube 8 can drive the drum wheel 12 to rotate.

[0046] Embodiment 2: Based on Embodiment 1, refer to Figure 4 As shown, a plurality of connecting straps 7 are evenly arranged on the inner circumference of the airbag ring 4, one end of the connecting strap 7 is fixed on the outer edge wall of the airbag ring 4, and the other end of the connecting strap 7 is fixed on the inner edge wall of the airbag ring 4. The connecting strap 7 is elastic, and the connecting strap 7 and the airbag ring 4 are integrally formed.

[0047] After the friction block 6 contacts the drum 12, the airbag ring 4 can be deformed under the rotation resistance of the drum 12, and the joint 7 can be stretched when the airbag ring 4 is deformed. Under the action of the joint 7, the deformation of the airbag ring 4 can be reduced, and the service life of the airbag ring 4 can be increased. At the same time, under the action of the joint 7, the airbag ring 4 can withstand and transmit a larger torque.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An expansion clutch rubber airbag, comprising an inner ring (1), the inner ring (1) being located between a shaft tube (8) and a drum wheel (12), the inner ring (1) being detachably fixedly sealedly connected to the outer side of the shaft tube (8), an airbag ring (4) being sleeved and fixedly arranged on the outer side of the inner ring (1), characterized in that: A plurality of through holes (3) are evenly distributed on the circumference of the inner ring (1), the axis of the through hole (3) is parallel to the axis of the shaft tube (8), a retaining ring (10) is fixed on the shaft tube (8) on one side of the inner ring (1), a plug rod (11) concentric with the through hole (3) is fixed on the retaining ring (10), the plug rod (11) is inserted into the through hole (3), a plurality of arc-shaped protrusions (5) are evenly distributed on the circumference of the outer edge of the airbag ring (4), a groove is provided on the outer side of the protrusion (5), an arc-shaped friction block (6) is installed in the groove, both ends of the protrusion (5) and both ends of the friction block (6) are fixedly connected by screws, a plurality of connecting straps (7) are evenly distributed on the inner circumference of the airbag ring (4), one end of the connecting strap (7) is fixed on the outer edge wall of the airbag ring (4), and the other end of the connecting strap (7) is fixed on the inner edge wall of the airbag ring (4), and the shaft tube (8) is connected to the airbag ring (4).

2. The expansion clutch rubber airbag according to claim 1, characterized in that: The inner edge of the inner ring (1) is fixedly and sealingly connected with a rubber ring (2), and the inner ring (1) and the shaft tube (8) are sealed via the rubber ring (2).

3. The expansion clutch rubber airbag according to claim 2, characterized in that: The shaft tube (8) is provided with an air hole (9), the rubber ring (2) is provided with a slot hole connected to the air hole (9), the inner ring (1) is provided with an opening (102) connected to the slot hole, and the inner edge wall of the airbag ring (4) is provided with an inlet hole connected to the opening (102).

4. The expansion clutch rubber airbag according to claim 1, characterized in that: Annular flanges (101) are provided on both sides of the outer edge of the inner ring (1), the inner side of the airbag ring (4) is located between the two flanges (101), and the inner side of the airbag ring (4) is fixedly connected to the flanges (101).

5. The expansion clutch rubber airbag according to claim 1, characterized in that: The connecting belt (7) is elastic, and the connecting belt (7) and the airbag ring (4) are integrally formed.

6. The expansion clutch rubber airbag according to claim 1, characterized in that: The airbag ring (4) and the protrusion (5) are integrally formed.

7. The expansion clutch rubber airbag according to claim 1, characterized in that: Both ends of the protrusion (5) are provided with stepped holes, and screws penetrate the stepped holes and are threadedly connected with the friction block (6).

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