Taper hole product expansion sleeve structure clamp
By using a tapered hole product expansion sleeve structure fixture, the problems of complex and inefficient processing of traditional tapered hole gear products are solved, achieving direct positioning and tensioning, improving production efficiency and reducing costs.
Patent Information
- Application Number
- CN202520301267.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-25
- Publication Date
- 2026-03-03
- Estimated Expiration
- 2035-02-25
AI Technical Summary
The traditional processing of tapered hole gear products has problems such as complex procedures, low efficiency, reduced accuracy and increased cost, especially the risk of pinching damage caused by changing the reference datum and multiple machining operations during precision turning.
A tapered hole product expansion sleeve structure fixture is adopted. The expansion sleeve body is tapered both inside and out and has a vertical groove structure, which can directly position and tighten the tapered hole product, simplify the processing flow and avoid the subsequent tapered hole turning process.
It enables direct positioning and tensioning of bevel-hole gear products, improving production efficiency and saving processing time and equipment configuration costs.
Smart Images
Figure CN223960558U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the mechanical cold working industry, and specifically relates to a clamping fixture for a tapered hole product expansion sleeve structure. Background Technology
[0002] In machining, the processing of tapered hole gears typically involves multiple steps, including finish turning, gear hobbing, machine chamfering, taper hole machining, chain groove machining, and heat treatment. Traditional methods leave a straight section of the inner hole during finish turning, which is used for positioning during gear hobbing and chamfering. After chamfering, the inner hole is then machined into a tapered hole. This method suffers from complex processes and low processing efficiency. Therefore, a fixture structure is needed that can center and position the inner hole using the tapered hole, allowing it to be machined directly into a tapered hole during finish turning, eliminating the need for subsequent taper hole machining steps.
[0003] As attached Figure 1 Figure 'a' is a structural diagram of a tapered hole product. The conventional machining process is as follows: during finish turning, the inner hole is machined into a straight hole, as shown below. Figure 1 b. Positioning and tensioning of the product can be achieved using conventional fixtures. The teeth are machined using the straight hole as a reference. (See...) Figure 2 After the teeth are machined, the outer diameter of the right clamp is turned to the inner hole to form the lower diameter. Figure 1 a. Full conical hole.
[0004] The original solution has the following obvious drawbacks:
[0005] 1. One additional taper hole machining process;
[0006] 2. After the gear is machined, the tapered hole is machined with the outer diameter as the reference. This will result in a reference conversion, which will reduce the gear accuracy due to machining errors.
[0007] 3. When machining an inner hole from an outer diameter, there is a risk of damage to the tooth tips.
[0008] 4. The gear hobbing process requires an additional machining and transfer step, increasing costs. Summary of the Invention
[0009] To overcome the shortcomings of the existing technology, this utility model proposes a tapered hole product expansion sleeve structure fixture, which can be directly used for tapered hole structure gear products, realizing direct positioning and tensioning of the tapered hole, saving a lot of processing time and saving the cost of configuring processing equipment.
[0010] The technical solution adopted in this utility model is:
[0011] A clamping fixture for tapered hole products includes a hollow expansion sleeve body. The lower part of the inner hole and the outer surface of the expansion sleeve body are both tapered. The expansion sleeve body has a thicker upper part and a thinner lower part. Several vertical grooves are spaced longitudinally on the expansion sleeve body, and these grooves are arranged from top to bottom and / or bottom to top without penetrating the expansion sleeve body. This invention directly sets the outer surface of the expansion sleeve body into a tapered structure, allowing tapered hole products to be directly machined into tapered holes before clamping and machining gears, thereby improving production efficiency.
[0012] Furthermore, the taper of the lower part of the inner hole of the expansion sleeve body is greater than the taper of the outer surface of the expansion sleeve body, ensuring that the expansion sleeve body has a thicker upper part and a thinner lower part structure.
[0013] Furthermore, the width of each of the vertical slots is uniformly set.
[0014] Furthermore, the vertical grooves from top to bottom and from bottom to top are distributed alternately.
[0015] Furthermore, the vertical grooves from top to bottom and from bottom to top are symmetrically distributed.
[0016] Furthermore, the upper end of the inner hole of the expansion sleeve body is a stepped structure, which is adapted to the upper end of the pull rod.
[0017] Furthermore, the outer surface taper of the expansion sleeve body is matched with the taper of the tapered hole product to ensure that the frictional force is greater than the tangential force in a static state.
[0018] Furthermore, a gap is provided between the outer surface of the expansion sleeve body and the tapered hole product, so that the expansion sleeve body can lock and center the tapered hole product after applying pressure.
[0019] Furthermore, the large end dimension of the expansion sleeve body is slightly larger than the large end dimension of the tapered hole of the tapered hole product, ensuring that the expansion sleeve body can tighten the tapered hole product and directly position it.
[0020] The beneficial effects of this utility model are that the tapered hole structure gear products can be used directly, realizing direct positioning and tensioning of the tapered hole, saving a lot of processing time and the cost of configuring processing equipment. Attached Figure Description
[0021] Figure 1 This is a structural schematic diagram of the tapered hole product of this utility model.
[0022] Figure 2 This is a schematic diagram of the existing straight hole fixture clamping structure.
[0023] Figure 3 This is a schematic diagram of the structure of this utility model.
[0024] Figure 4 This is a schematic diagram of the structure of this utility model.
[0025] In the figure: 1. Expansion sleeve body; 2. Inner hole; 3. Outer surface; 4. Vertical groove; 5. Tie rod; 6. Tapered hole product; 7. Positioning plate; 8. Machine tool body; 9. Pressure cap. Detailed Implementation
[0026] The present invention will be further described below with reference to specific embodiments, but the present invention is not limited to these specific embodiments. Those skilled in the art should recognize that the present invention covers all alternatives, improvements and equivalents that may be included within the scope of the claims.
[0027] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They 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, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.
[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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 according to the specific circumstances.
[0029] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0030] See Figure 3 , Figure 4 This embodiment provides a clamping fixture for a tapered hole product expansion sleeve structure, including a hollow expansion sleeve body 1. The lower part of the inner hole 2 and the outer surface 3 of the expansion sleeve body 1 are both tapered structures. The expansion sleeve body 1 has a structure that is thicker at the top and thinner at the bottom. Several vertical grooves 4 are spaced longitudinally on the expansion sleeve body 1. These vertical grooves 4 are arranged from top to bottom and / or bottom to top without penetrating the expansion sleeve body 1. This utility model directly sets the outer surface of the expansion sleeve body 1 into a tapered structure, so that tapered hole products can be directly machined into tapered holes for clamping and machining gears, thereby improving production efficiency.
[0031] In this embodiment, the taper of the lower part of the inner hole 2 of the expansion sleeve body 1 is greater than the taper of the outer surface 3 of the expansion sleeve body 1, ensuring that the expansion sleeve body 1 has a thicker upper part and a thinner lower part structure.
[0032] In this embodiment, the width of each vertical groove 4 is uniformly set. Each segment acts like a wedge; after the pull rod applies a certain pressure to its end face, the wedge moves, thus achieving the function of locking the product.
[0033] In this embodiment, the vertical grooves 4 from top to bottom and from bottom to top can be spaced apart. Of course, all of them can be vertical grooves from top to bottom or from bottom to top, as long as they are not completely cut off and have good elasticity.
[0034] In this embodiment, the vertical grooves 4 from top to bottom and from bottom to top can be symmetrically distributed or evenly spaced.
[0035] In this embodiment, the upper end of the inner hole 2 of the expansion sleeve body 1 is a stepped structure, which is adapted to the upper end of the pull rod.
[0036] In this embodiment, the taper of the outer surface 2 of the expansion sleeve body 1 matches the taper of the tapered hole of the tapered hole product 6, ensuring that the frictional force is greater than the tangential force in a static state. A gap is provided between the outer surface 3 of the expansion sleeve body 1 and the tapered hole product 6 to facilitate locking and centering of the tapered hole product after pressure is applied to the expansion sleeve body 1. Simultaneously, it ensures that the tapered hole product 6 contacts the positioning plate 7 during installation. The gap between the expansion sleeve body 1 and the inner hole of the tapered hole product is generally adjusted to 0.02-0.1 mm. The larger end dimension of the expansion sleeve body 1 is slightly larger than the larger end dimension of the tapered hole of the tapered hole product 6, ensuring that the expansion sleeve body can tighten the tapered hole product for direct positioning.
[0037] When using this utility model:
[0038] 1) Install the expansion sleeve body 1 and the tapered hole product 6 onto the machine tool body 8 in sequence;
[0039] 2) Pre-tighten the cap 9 to the upper surface of the product;
[0040] 3) The pull rod 5 moves down, causing the expansion sleeve body 1 to move downward, thereby achieving centering and tensioning of the tapered hole within the tapered hole product 6;
[0041] 4) Increase the tailstock pressure to the final test pressure and begin machining;
[0042] 5) After processing, the pressure cap 9 is removed, the pull rod 5 is moved upward, and the tapered hole product 6 is removed;
[0043] 6) Complete the processing.
[0044] The use of this utility model allows all tapered hole structure gear products to be used directly, realizing direct positioning and tensioning of the tapered hole, saving a lot of processing time and the cost of configuring processing equipment.
Claims
1. A clamping fixture for a tapered hole product expansion sleeve structure, comprising a hollow expansion sleeve body, characterized in that: The lower part of the inner hole and the outer surface of the expansion sleeve body are both tapered structures. The expansion sleeve body is a structure that is thicker at the top and thinner at the bottom. Several vertical grooves are spaced apart along the longitudinal direction on the expansion sleeve body. The vertical grooves are arranged from top to bottom and / or from bottom to top without penetrating the expansion sleeve body.
2. The tapered hole product expansion sleeve structure fixture according to claim 1, characterized in that: The taper of the lower part of the inner hole of the expansion sleeve body is greater than the taper of the outer surface of the expansion sleeve body.
3. The tapered hole product expansion sleeve structure fixture according to claim 1, characterized in that: The width of each of the vertical slots is uniformly set.
4. The tapered hole product expansion sleeve structure fixture according to claim 1, characterized in that: The vertical grooves from top to bottom and from bottom to top are distributed alternately.
5. A tapered hole product expansion sleeve structure fixture according to claim 4, characterized in that: The vertical grooves from top to bottom and from bottom to top are symmetrically distributed.
6. A tapered hole product expansion sleeve structure fixture according to claim 1, characterized in that: The upper end of the inner hole of the expansion sleeve body is a stepped structure, which is adapted to the upper end of the pull rod.
7. A tapered hole product expansion sleeve structure fixture according to claim 1, characterized in that: The outer surface taper of the expansion sleeve body is adapted to the taper of the tapered hole product.
8. A tapered hole product expansion sleeve structure fixture according to claim 7, characterized in that: A gap is provided between the outer surface of the expansion sleeve body and the tapered hole product.
9. A tapered hole product expansion sleeve structure fixture according to claim 8, characterized in that: The large end dimension of the expansion sleeve body is slightly larger than the large end dimension of the tapered hole of the tapered hole product.