Disc tooth fixing device and pneumatic mechanism

Abstract

The utility model belongs to disc tooth fixing technical field, concretely relates to a disc tooth fixing device and pneumatic mechanism, the device includes: the inside of base is provided with the placing groove, just the inside horizontal of base is provided with the air inlet channel to be connected with the placing groove with the gas pipe joint, pneumatic mechanism is arranged in the placing groove, and the rubber tube in the pneumatic mechanism is suitable for swelling when filling in the gas in the placing groove, drive mechanism is arranged in the outside of pneumatic mechanism, wherein each drive part in the drive mechanism is suitable for being pushed by the rubber tube to adhere to the inner wall of disc tooth when the rubber tube swells, and the outer wall of each drive part is all provided with at least one arc recess, wherein the outer wall of drive part is provided with the annular spring, and the annular spring is clamped in the corresponding arc recess.

Description

Technical Field

[0001] This utility model belongs to the field of disc tooth fixing technology, specifically relating to disc tooth fixing device and pneumatic mechanism. Background Technology

[0002] An air shaft (also known as an expansion shaft or air-filled shaft) uses internal high-pressure gas to inflate air bladders or expansion bars on its outer wall, applying radial pressure to external drums or material cores (such as blank discs in gear machining) for secure fixation. In machining, especially in precision machining processes like CNC hobbing, gear shaping, and gear grinding of gears, air shafts have become crucial tooling fixtures for fixing gear blanks due to their high positioning accuracy, convenient clamping, good centering, and minimal damage to the core. Traditional methods using keyways or mechanical clamping are gradually being replaced by air shafts, effectively improving the automation level and production efficiency of gear machining.

[0003] However, existing air shafts still have some obvious drawbacks when used for gear machining. In existing air shafts, the drive component that abuts against the inner wall of the gear is generally directly connected to the air bladder, relying on the expansion and contraction of the air bladder to fix and detach the gear. However, as the air bladder ages, it becomes difficult to effectively drive the drive component, thus affecting the fixation of the gear and making it difficult for the gear to detach quickly after machining.

[0004] Therefore, a toothed fixing device and a pneumatic mechanism are designed to solve the technical problem in the prior art where the driving component is connected to the airbag, making it difficult to move the driving component after the airbag ages.

[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of the present application concept, and therefore, the above description is not considered to constitute prior art information. Utility Model Content

[0006] This disclosure provides at least one disc tooth fixing device and a pneumatic mechanism.

[0007] In a first aspect, embodiments of this disclosure provide a tooth fixing device, comprising: The base has a placement slot inside, and the base has a horizontal air inlet channel inside to connect the air pipe connector to the placement slot. A pneumatic mechanism is provided in the placement slot, and the rubber cylinder in the pneumatic mechanism is adapted to expand when gas is filled into the placement slot; A drive mechanism is disposed outside the pneumatic mechanism; wherein Each driving component in the driving mechanism is adapted to be pushed by the rubber tube to conform to the inner wall of the disc teeth when the rubber tube expands. Each of the aforementioned driving components has at least one arc-shaped groove on its outer wall; wherein A ring spring is fitted on the outer wall of the drive component, and the ring spring is engaged in the corresponding arc-shaped groove.

[0008] In one optional embodiment, the pneumatic mechanism includes: The connector has its top inserted into the bottom end of the rubber tube, and the bottom of the connector inserted into the placement groove; wherein... The bottom outer wall of the connector has at least one annular groove to form an annular air passage after the bottom of the connector is inserted into the placement groove. The annular air passage is connected to the air intake passage.

[0009] In one alternative embodiment, a sealing element is inserted into the top of the rubber tube; The connector has a vertically opening inflation channel inside, and a horizontally opening connecting air passage inside; wherein The connecting air passage is connected to the annular air passage to introduce the gas in the annular air passage into the interior of the rubber tube.

[0010] In one optional implementation, the drive mechanism includes: A support cylinder is disposed on the upper end face of the base and sleeved on the outside of the rubber cylinder; The inner wall of the support cylinder is provided with several sliding grooves circumferentially; wherein Each of the aforementioned grooves is slidably connected to a slider, and each of the aforementioned driving components is connected to the corresponding slider.

[0011] In one optional embodiment, the end face of each slider located inside the support cylinder abuts against the outer wall of the rubber cylinder.

[0012] In one alternative embodiment, each of the drive members has a support platform on its outer wall to abut against the lower end face of the disc teeth.

[0013] Secondly, embodiments of this disclosure also provide a pneumatic mechanism for a tooth fixing device, comprising: The connector has its top inserted into the bottom end of the rubber tube, and its bottom inserted into the placement groove; wherein The bottom outer wall of the connector has at least one annular groove to form an annular air passage after the bottom of the connector is inserted into the placement groove. The annular air passage is connected to the air intake passage.

[0014] In one alternative embodiment, a sealing element is inserted into the top of the rubber tube; The connector has a vertically opening inflation channel inside, and a horizontally opening connecting air passage inside; wherein The connecting air passage is connected to the annular air passage to introduce the gas in the annular air passage into the interior of the rubber tube.

[0015] The beneficial effects of this utility model are that, by setting up a pneumatic mechanism and a drive mechanism, the drive mechanism abuts against the outer wall of the rubber cylinder in the pneumatic mechanism, and inflates the rubber cylinder by inflating it, thereby pushing the drive components to move and fit against the inner wall of the disc teeth to fix the disc teeth. Furthermore, by sleeved with annular springs on the outside of each drive component, the retraction of the annular springs drives the expanded drive components to reset, thus avoiding the problem of the rubber cylinder aging and being unable to drive the drive components to reset after long-term use.

[0016] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description, claims, and drawings.

[0017] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 An overall perspective view of the device provided in the embodiments of this disclosure; Figure 2 This is an internal planar cross-sectional view of the device provided in an embodiment of this disclosure.

[0020] In the picture: 1. Base; 10. Fixing rod; 2. Pneumatic mechanism; 20. Rubber tube; 21. Connector; 210. Inflation channel; 22. Seal; 3. Drive mechanism; 30. Support cylinder; 31. Drive component; 32. Slider; 33. Ring spring; 4. Disc teeth. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] In this document, when it is mentioned that a first component is located on a second component, this can mean that the first component can be directly formed on the second component, or that a third component can be inserted between the first and second components. Furthermore, in the accompanying drawings, the thickness of the components may be exaggerated or reduced for the purpose of effectively describing the technical content.

[0023] In this document, when an element or layer is referred to as “located,” “joined to,” “connected to,” “attached to,” or “coupled to” another element or layer, it may be directly located, joined, connected, attached to, or coupled to the other element or layer, or there may be intermediate elements or layers present. Conversely, when an element is referred to as “directly on another element or layer,” “directly joined to,” “directly connected to,” “directly attached to,” or “directly coupled to” another element or layer, there may be no intermediate elements or layers present. Other terms used to describe relationships between elements should be interpreted in a similar manner (e.g., “between” versus “directly between,” “adjacent” versus “directly adjacent,” etc.). As used herein, the term “and / or” includes any and all combinations of one or more of the related listed items.

[0024] In this document, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as “at least one of…” modify the entire list of elements when following a list of elements, rather than individual elements in the list. For example, the expression “at least one of a, b, and c” should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0025] The terminology used herein is for the purpose of describing specific exemplary configurations only and is not intended to be limiting. As used herein, the singular articles “a,” “an,” and “the” may also be intended to include plural forms unless otherwise clearly stated herein. The terms “comprising,” “including,” and “having” are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as requiring them to be performed in the specific order discussed or shown, unless specifically identified as such. Additional or alternative steps may be employed.

[0026] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0027] Research has revealed that existing air shafts still have some significant drawbacks when used for machining disc teeth. In existing air shafts, the drive component that abuts against the inner wall of the disc teeth is generally directly connected to the air bladder, relying on the expansion and contraction of the air bladder to fix and detach the disc teeth. However, as the air bladder ages, it becomes difficult to effectively move the drive component, thus affecting the fixation of the disc teeth and making it difficult for the disc teeth to detach quickly after machining.

[0028] Based on the above research, this disclosure provides a disc tooth fixing device and a pneumatic mechanism. By setting up a pneumatic mechanism and a drive mechanism, each drive component in the drive mechanism abuts against the outer wall of the rubber cylinder in the pneumatic mechanism. By inflating the rubber cylinder with air, the rubber cylinder expands, thereby pushing each drive component to move and fit against the inner wall of the disc tooth to fix the disc tooth. Furthermore, by sleeved with annular springs on the outside of each drive component, the retraction of the annular springs drives each expanded drive component to reset, thus avoiding the difficulty of resetting the drive component due to aging of the rubber cylinder after long-term use.

[0029] The shortcomings of the above solutions are the result of the inventor's practical experience and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure should be considered as the inventor's contribution to this disclosure.

[0030] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0031] The following detailed description, with reference to the accompanying drawings, describes some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0032] In some embodiments, such as Figures 1 to 2As shown, the base 1 and the fixing rod 10 below it are usually manufactured using an integral molding process. This design ensures the integrity of the structure and mechanical strength. The fixing rod 10 serves as the interface between the device and the processing equipment. Its bottom end is firmly connected to the CNC machine tool, gear hobbing machine or gear shaping machine and other processing equipment through thread or flange connection, so that the entire device is vertically fixed inside the worktable. Figure 1 The overall three-dimensional appearance of the device is shown. The compact design of the base 1 facilitates integration into various processing environments. An internal slot (not shown) is provided within the base 1 to accommodate the pneumatic mechanism 2. The walls of the slot are typically polished to reduce friction with the pneumatic mechanism 2 and ensure gas tightness. Furthermore, the base 1 integrates an air inlet channel (not shown), which is horizontally arranged and connects an air hose connector (not shown) to the slot. This connector allows for quick connection to an external air supply system, which may include components such as an air compressor, pressure regulating valve, and solenoid valve. Precise operation is achieved by controlling the gas flow and pressure.

[0033] In some embodiments, such as Figure 2 As shown, before starting to process the disc teeth 4, the operator needs to first put the disc teeth 4 on the outside of each driving component 31 of the drive mechanism 3. The disc teeth 4 are usually gear blanks with smooth or toothed structures on their inner walls. The driving component 31 is designed to be arc-shaped or wedge-shaped to match the contour of the inner wall of the disc teeth. The support platform (not shown in the figure) provided on the outer wall of the driving component 31 plays a supporting role. When the lower end face of the disc teeth 4 abuts against the upper end face of the support platform, it can prevent the disc teeth 4 from axially displacing during the processing.

[0034] In some embodiments, such as Figure 2As shown, the operator connects the air hose connector to an external air supply device. Gas (usually dry compressed air) enters the air intake channel through the air hose connector. The end of the air intake channel is precisely located within an annular air passage (not shown in the figure). This design prevents gas leakage and achieves uniform distribution. The annular air passage is formed by the mating of an annular groove on the bottom outer wall of the connector 21 and the wall of the placement slot. After the gas passes through the air intake channel and enters the annular air passage, it will pass through a horizontally opened connecting air passage (not shown in the figure) inside the connector 21, and then enter the vertical inflation channel 210. The connector 21 and the seal 22 are respectively inserted into the bottom and top of the rubber cylinder 20. The connector 21 is usually made of metal (such as aluminum alloy). Its top is sealed with the bottom of the rubber tube 20 by interference fit or O-ring to ensure no air leakage under high pressure. The seal 22 can be made of rubber or polyurethane material, which is elastic and wear-resistant. It is used to seal the top of the rubber tube 20 to prevent gas from escaping from the top. The rubber tube 20 itself is made of high-strength rubber material, which can expand evenly when inflated. As gas is continuously filled into the rubber tube 20, the rubber tube 20 expands under the constraint of the support tube 30. The support tube 30 is sleeved on the outside of the rubber tube 20. Its inner wall has several grooves (not shown in the figure) circumferentially opened to guide the movement of the slider 32. The expansion process of the rubber sleeve 20 is gradual: in the initial stage, the gas filling causes the rubber sleeve 20 to undergo elastic deformation, and the expansion force is evenly applied to the surrounding components. Due to the constraint of the support cylinder 30, the rubber sleeve 20 mainly expands radially, pushing each slider 32 to one end located inside the support cylinder 30. When the slider 32 slides in the groove 300, it drives the corresponding driving component 31 to move outward. The outer wall of the driving component 31 is designed with arc-shaped grooves (not shown in the figure). These grooves not only reduce weight, but also provide a locking position for the annular spring 33. As the drive components 31 move, they gradually conform to the inner wall of the disc teeth 4. This process achieves radial fixation of the disc teeth: the contact surface between the drive components 31 and the inner wall of the disc teeth can be coated with a wear-resistant coating to reduce wear and increase friction. After conformation, the disc teeth 4 are firmly locked and can withstand cutting forces, vibrations, and torques during processing. During this process, the annular springs 33 sleeved on the outer wall of each drive component 31 are stretched. The preload of the springs ensures that the drive components 31 can quickly return to their original position when the rubber sleeve 20 contracts, avoiding delays caused by aging of the rubber sleeve.

[0035] In some embodiments, after the disc teeth 4 are processed, the external air supply system stops supplying air and releases the gas in the rubber cylinder 20. The rubber cylinder 20 contracts due to the elastic restoring force and no longer supports the slider 32. At this time, the rebound force of the ring spring 33 comes into play, pulling each drive component 31 to reset inward, ensuring that the disc teeth 4 can quickly disengage from the device. The operator can then safely remove the processed disc teeth 4 and proceed to the next round of clamping.

[0036] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as the second element, component, region, layer, or segment.

[0038] Spatially relative terms, such as “inside,” “outside,” “below,” “below,” “down,” “above,” “up,” etc., may be used herein to describe the relationship between one element or feature illustrated in the figures and another element or feature. In addition to the orientations depicted in the figures, spatially relative terms may be intended to cover different orientations of the device in use or operation. For example, if the device in the figure is flipped, an element described as “below” or “below” other elements or features would be oriented as “above” other elements or features. Thus, the example term “below” can cover both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.

[0039] In the above discussion, unless otherwise stated, when used to describe numerical values, the terms “about,” “approximately,” “basically,” etc., indicate a change of + / - 10% in that value.

[0040] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A toothed disc fixing device, characterized in that, include: The base (1) has a placement slot inside, and the base (1) has a horizontal air inlet channel inside to connect the air pipe connector to the placement slot. A pneumatic mechanism (2) is provided in the placement slot, and the rubber tube (20) in the pneumatic mechanism (2) is adapted to expand when gas is filled into the placement slot; The drive mechanism (3) is disposed outside the pneumatic mechanism (2); wherein Each drive element (31) in the drive mechanism (3) is adapted to be pushed by the rubber tube (20) to conform to the inner wall of the disc teeth (4) when the rubber tube (20) expands; Each of the aforementioned driving components (31) has at least one arc-shaped groove on its outer wall; wherein A ring spring (33) is sleeved on the outer wall of the drive component (31), and the ring spring (33) is engaged in the corresponding arc-shaped groove.

2. The tooth fixing device as described in claim 1, characterized in that, The pneumatic mechanism (2) includes: A connector (21) is inserted at its top into the bottom end of a rubber tube (20), and the bottom of the connector (21) is inserted into the placement groove; wherein The bottom outer wall of the connector (21) is provided with at least one annular groove to form an annular air passage after the bottom of the connector (21) is inserted into the placement groove; The annular air passage is connected to the air intake passage.

3. The disc tooth fixing device as described in claim 2, characterized in that, A sealing element (22) is inserted into the top of the rubber tube (20); The connector (21) has a vertically formed inflation channel (210) inside, and a horizontally formed air passage inside; wherein The connecting air passage is connected to the annular air passage to introduce the gas in the annular air passage into the interior of the rubber tube (20).

4. The tooth fixing device as described in claim 3, characterized in that, The drive mechanism (3) includes: A support cylinder (30) is disposed on the upper end face of the base (1) and sleeved on the outside of the rubber cylinder (20); The inner wall of the support cylinder (30) is provided with several sliding grooves circumferentially; wherein Each of the grooves is slidably connected to a slider (32), and each of the driving components (31) is connected to the corresponding slider (32).

5. The tooth fixing device as described in claim 4, characterized in that, The end face of each slider (32) located inside the support cylinder (30) abuts against the outer wall of the rubber cylinder (20).

6. The tooth fixing device as described in claim 5, characterized in that, Each of the aforementioned drive components (31) has a support platform on its outer wall to be adapted to abut against the lower end face of the disc teeth (4).

7. A pneumatic mechanism for a disc tooth fixing device as described in any one of claims 1-6, characterized in that, include: The connector (21) has its top inserted into the bottom end of the rubber tube (20), and the bottom of the connector (21) is inserted into the placement groove; wherein The bottom outer wall of the connector (21) is provided with at least one annular groove to form an annular air passage after the bottom of the connector (21) is inserted into the placement groove; The annular air passage is connected to the air intake passage.

8. The pneumatic mechanism for the disc tooth fixing device as described in claim 7, characterized in that, A sealing element (22) is inserted into the top of the rubber tube (20); The connector (21) has a vertically formed inflation channel (210) inside, and a horizontally formed air passage inside; wherein The connecting air passage is connected to the annular air passage to introduce the gas in the annular air passage into the interior of the rubber tube (20).

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