Pneumatic normally closed tooth type clutch

Abstract

The utility model provides a pneumatic normally-closed tooth type clutch which comprises an inner ring used for being connected with an input end shaft and a transmission disc capable of moving along the axis of the inner ring and connected to the inner ring in a transmission mode. The outer ring is rotatably connected to the inner ring, the fixed flange is rotatably arranged on the inner ring, the air inlet ring is fixedly arranged on the fixed flange, and the transition ring is rotatably arranged on the transmission disc; a plurality of elastic pieces are arranged between the transition ring and the fixed flange; an air chamber is formed between the transition ring and the air inlet ring, and an air inlet hole communicated with the air chamber is formed in the air inlet ring. The pneumatic clutch solves the problems that ventilation is not needed when the pneumatic clutch works, ventilation is needed when the pneumatic clutch is separated, dependence on an air source can be avoided, and the pneumatic clutch cannot work without air. And meanwhile, the clutch can realize single-point combination to facilitate machine adjustment and state adjustment, and the clutch adopts an isosceles trapezoid tooth type, so that the difficulty that the transmission torque is small due to non-wear resistance can be effectively avoided. The clutch has the advantages of being large in transmission torque, compact in combination and long in service life.

Description

Technical Field

[0001] This utility model relates to the field of clutch technology, and more specifically, to a pneumatic normally closed gear clutch. Background Technology

[0002] A pneumatic clutch is a type of clutch that uses air pressure to engage and a return spring to disengage. Specifically, it has an inner ring connected to the input shaft and an outer ring connected to the load. When air is supplied, the outer ring moves axially to engage with a drive disc connected to the inner ring. When pressure is released, the clutch automatically disengages via the return spring.

[0003] However, existing pneumatic clutches are typically normally open toothed clutches; their outer ring and transmission disc engage arbitrarily on the circumference, and to facilitate engagement, the teeth are made fine and numerous, resulting in easy tooth wear and low torque transmission. This makes them unsuitable for certain applications, such as printing presses, where adjusting the printing position by engaging the clutch at any point during machine setup can lead to printing errors. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a pneumatic normally closed gear clutch to solve the above problems.

[0005] The present invention adopts the following solution:

[0006] This application provides a pneumatic normally closed gear clutch, including an inner ring for connection to an input shaft, a transmission disc that can move along the axis of the inner ring and is drively connected to the inner ring, and an outer ring that is rotatably connected to the inner ring.

[0007] It also includes a fixed flange rotatably mounted on the inner ring, an air intake ring fixed on the fixed flange, and a transition ring rotatably mounted on the transmission disc; a plurality of elastic elements are provided between the transition ring and the fixed flange; an air chamber is formed between the transition ring and the air intake ring, and an air intake hole communicating with the air chamber is provided on the air intake ring;

[0008] The transmission disc and the outer ring are respectively provided with meshing teeth and meshing grooves on their opposite end faces, so that the transmission disc can achieve single-point meshing transmission with the outer ring under the action of the elastic element; and disengage from meshing under the action of external air pressure to overcome the action of the elastic element.

[0009] Furthermore, the transition ring forms a sealed connection with the intake ring through a sealing ring, thereby forming the air chamber.

[0010] Furthermore, the transmission disc includes a disc body with meshing teeth on its end face, and a shaft body connected to the disc body and connected to the middle spline step of the inner ring via an involute spline drive.

[0011] Further, the fixed flange is rotatably connected to one end of the inner ring through a bearing, and is axially limited through the end face of the spline step and the hole card and shaft card arranged on the fixed flange and the inner ring.

[0012] Further, the transition ring is arranged on the shaft body through a bearing, and is axially limited through the step on the shaft body and the shaft card and hole card.

[0013] Further, the outer ring is rotatably connected to the other end of the inner ring through a bearing, and is axially limited through the end face of the spline step and the hole card and shaft card arranged on the outer ring and the inner ring.

[0014] Further, the meshing tooth is an isosceles trapezoidal tooth, and the meshing groove is an isosceles trapezoidal groove.

[0015] By adopting the above technical scheme, the following technical effects can be achieved by the utility model:

[0016] The pneumatic clutch does not need to be ventilated during work, and needs to be ventilated only during separation, so that the dependence on the air source can be avoided, and the working difficulty caused by the lack of air can be avoided. Meanwhile, the clutch can realize single-point combination and is convenient to adjust the state of the machine, and the isosceles trapezoidal tooth type is selected for the clutch, so that the difficulty of small torque transmission and poor wear resistance can be effectively avoided. The clutch has the advantages of large torque transmission, compact combination, and long service life. The clutch can be used as a shaft coupling in a conventional state, and needs to be separated when maintenance is needed. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the utility model, and should not be regarded as a limitation to the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0018] Fig. 1 is a cross-sectional structure schematic view of a pneumatic normally closed tooth type clutch of an embodiment of the utility model;

[0019] Fig. 2 is a transmission disc structure schematic view of a pneumatic normally closed tooth type clutch of an embodiment of the utility model;

[0020] Fig. 3 is an outer ring structure schematic view of a pneumatic normally closed tooth type clutch of an embodiment of the utility model;

[0021] Icon: inner ring 1, transmission disc 2, outer ring 3, fixed flange 4, air inlet ring 5, transition ring 6, elastic member 7, air chamber 8, air inlet hole 9, meshing tooth 10, meshing groove 11, disc body 12, shaft body 13, first hole clamp 14, first shaft clamp 15, first bearing 16, second bearing 17, second shaft clamp 18, second hole clamp 19, screw 20, third bearing 21, third hole clamp 22, third hole clamp 23, mounting groove 24, spline step 25, sealing ring 26. DETAILED DESCRIPTION

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will be a clear and complete description of the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only to represent selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0023] EMBODIMENT

[0024] In combination with Figs. 1 to 3 As shown in the drawings, the present embodiment provides a pneumatic normally closed tooth clutch, which comprises an inner ring 1 for connecting with an input shaft, a transmission disc 2 capable of moving along the axis of the inner ring 1 and being transmission-connected to the inner ring 1, and an outer ring 3 rotatably connected to the inner ring 1.

[0025] Further comprising a fixed flange 4 rotatably arranged on the inner ring 1, an air inlet ring 5 fixedly arranged on the fixed flange 4, and a transition ring 6 rotatably arranged on the transmission disc 2; a plurality of elastic members 7 are arranged between the transition ring 6 and the fixed flange 4; an air chamber 8 is formed between the transition ring 6 and the air inlet ring 5, and an air inlet hole 9 is arranged on the air inlet ring 5 and communicates with the air chamber 8.

[0026] Meshing teeth 10 and meshing grooves 11 are respectively arranged on the opposite end faces of the transmission disc 2 and the outer ring 3, so that the transmission disc 2 can realize single-point meshing transmission with the outer ring 3 under the action of the elastic members 7, and can be disengaged from meshing under the action of external air pressure overcoming the action of the elastic members 7.

[0027] Specifically, in the embodiment, the transmission disc 2 comprises a disc body 12 provided with a plurality of meshing teeth 10 on an end face, and a shaft body 13 connected to the disc body 12 and connected to the middle spline step 25 of the inner ring 1 through a gradual line spline transmission. The fixed flange 4 is rotatably connected to one end of the inner ring 1 through a first bearing 16, and is axially limited through the end face of the spline step 25 and a first hole clamp 14 and a first shaft clamp 15 provided on the fixed flange 4 and the inner ring 1. It should be noted that the fixed flange 4 is fixed relative to the inner ring 1. The transition ring 6 is provided on the shaft body 13 through a second bearing 17, and is axially limited and connected through a step on the shaft body 13 and a second shaft clamp 18 and a second hole clamp 19. The air inlet ring 5 is fixed on the fixed flange 4 through a screw 20; and is sealingly connected with the transition ring 6 through a sealing ring 26, thereby forming the air chamber 8. The outer ring 3 is rotatably connected to the other end of the inner ring 1 through a third bearing 21, and is axially limited through the end face of the spline step 25 and a third hole clamp 22 and a third shaft clamp 23 provided on the outer ring 3 and the inner ring 1. An end face of the outer ring 3 is provided with a meshing groove 11 matched with the meshing teeth 10. The plurality of meshing teeth 10 are distributed and arranged so that the transmission disc 2 and the outer ring 3 can only be combined in a single direction.

[0028] In the embodiment, the fixed flange 4 is provided with a plurality of mounting grooves 24, and the elastic member 7 is a compression spring arranged on the mounting grooves 24 and acting on the transition ring 6. In this way, the compression spring is arranged on the fixed flange 4, which can avoid the second bearing 17 from being subjected to axial force when the air chamber 8 is working. The transition ring 6 is supported by the second bearing 17 and provided with bidirectional limiting, which can avoid axial movement of the clutch caused by transportation shaking or installation knocking, thereby avoiding clutch jamming. The air inlet ring 5 is fixed on the fixed flange 4 through the screw 20, and the split structure facilitates machining and installation.

[0029] When working: the air inlet hole 9 is not ventilated, the transition ring 6 is driven by the elastic force of the compression spring to make the transmission disc 2 close to the outer ring 3, the meshing teeth 10 are engaged with the meshing grooves 11, and the transmission disc 2 and the outer ring 3 are combined in a single direction. In the combined state, the inner ring drives the transmission disc 2 to rotate, the transmission disc 2 drives the outer ring 3 to rotate, and the outer ring 3 drives the load to rotate. When separating: the air inlet hole 9 is ventilated into the air chamber 8, and the transition ring 6 overcomes the elastic force of the compression spring under the action of air pressure, and then the transition ring 6 moves backward until it is attached to the fixed flange 4, and the transition ring 6 synchronously drives the transmission disc 2 to move away from the outer ring 3, so that the meshing teeth 10 are disengaged from the meshing grooves 11, and at this time the inner ring drives the transmission disc 2 to idle.

[0030] In the embodiment, preferably, the meshing teeth 10 are isosceles trapezoidal teeth, and the meshing grooves 11 are isosceles trapezoidal grooves. The difficulty of small torque transmission and poor wear resistance can be effectively avoided.

[0031] The pneumatic normally closed tooth clutch can avoid the dependence on the air source, and the difficulty that the clutch cannot work without air. In the conventional state, the clutch is used as a shaft coupling, and when maintenance is needed, the air source is connected to separate the clutch. The clutch can be combined at a single point, which is convenient for adjusting the state of the machine. The clutch is provided with isosceles trapezoidal teeth, and the difficulty of small torque transmission and poor wear resistance can be effectively avoided. In particular, for a printing machine, single-point combination can effectively avoid the situation that the printing position is adjusted and the printing is disordered. The clutch has the advantages of large torque transmission, compact combination, and long service life.

[0032] The preferred embodiments of the utility model are described above, and the protection scope of the utility model is not limited to the above-mentioned embodiments. Any technical solution belonging to the idea of the utility model belongs to the protection scope of the utility model.

[0033] In the description of the utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0034] In addition, the terms "first", "second", etc. are used only for descriptive purposes and should not be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0035] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] In the present application, unless otherwise specifically defined and limited, the "upper" or "lower" of the first feature to the second feature can include the direct contact of the first and second features, or it can include the contact of the first and second features through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include the vertical and oblique above of the first feature to the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include the vertical and oblique below of the first feature to the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

Claims

1. A pneumatic normally closed tooth clutch comprising an inner race for connection to an input shaft, a driving disc movable along the axis of said inner race and drivingly connected to said inner race, an outer race rotatably connected to said inner race; characterized in that ； The fixed flange is rotatably arranged on the inner ring, the air inlet ring is fixed on the fixed flange, and the transition ring is rotatably arranged on the transmission disc; a plurality of elastic members are arranged between the transition ring and the fixed flange; the air chamber is formed between the transition ring and the air inlet ring, and the air inlet hole is arranged on the air inlet ring and communicates with the air chamber; The end faces of the transmission disc and the outer ring are respectively provided with the meshing teeth and the meshing groove, so that the transmission disc can be in single-point meshing transmission with the outer ring under the action of the elastic members; and the transmission disc can be separated from the meshing under the action of external air pressure and overcome the action of the elastic members.

2. The pneumatic, normally closed tooth clutch of claim 1, wherein, The transition ring is sealingly connected with the air inlet ring through the sealing ring, and the air chamber is formed.

3. The pneumatic, normally closed tooth clutch of claim 1, wherein, The transmission disc comprises a disc body provided with the meshing teeth on the end face, and a shaft body connected to the disc body and connected to the middle spline step of the inner ring through the involute spline transmission.

4. The pneumatic, normally closed tooth clutch of claim 3, wherein, The fixed flange is rotatably connected to one end of the inner ring through the bearing, and is axially limited through the end face of the spline step and the hole card and shaft card arranged on the fixed flange and the inner ring.

5. The pneumatic, normally closed tooth clutch of claim 3, wherein, The transition ring is arranged on the shaft body through the bearing, and is axially limited through the step on the shaft body and the shaft card and hole card.

6. The pneumatic, normally closed tooth clutch of claim 3, wherein, The outer ring is rotatably connected to the other end of the inner ring through the bearing, and is axially limited through the end face of the spline step and the hole card and shaft card arranged on the outer ring and the inner ring.

7. The pneumatic normally closed tooth clutch according to any one of claims 1 to 6, characterized in that The meshing teeth are isosceles trapezoidal teeth, and the meshing groove is isosceles trapezoidal groove.

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