Transmission tool for cylindrical grinding of shaft parts

Abstract

The utility model provides a transmission tool for cylindrical grinding of shaft parts, which comprises a transmission sleeve provided with a first center hole, at least one transmission claw extending along the axial direction is arranged on the periphery of the first center hole of the transmission sleeve, and the transmission claw is used for extending into a key slot of the shaft parts; and the clamp body is coaxially and detachably connected with the transmission sleeve, the clamp body is provided with a second center hole, and the second center hole is communicated with the first center hole. The transmission sleeve is provided with the transmission claw extending in the axial direction, after the transmission claw extends into a key groove of a shaft part, the main shaft can drive the shaft part to rotate synchronously after rotating, compared with a heart-shaped chuck, clamping and clamping are convenient, an outer circle cannot be damaged by clamping, machining efficiency is improved, stress on a bearing of the outer circle grinding main shaft can be more uniform, and the service life of the outer circle grinding main shaft is prolonged. And the machining precision of the shaft parts is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of shaft parts processing, in particular to a transmission tooling for cylindrical grinding of shaft parts. Background Art

[0002] External cylindrical grinding of shafts (hereinafter referred to as external cylindrical grinding) is a precision machining process, which is mainly used to improve the dimensional accuracy and surface finish of the outer cylindrical surface of shaft parts. This process is usually carried out on a special grinding machine, such as an external cylindrical grinder, using a grinding wheel as a cutting tool to remove material.

[0003] In the prior art, when a cylindrical grinder is used to process the surface of a shaft part, a heart-shaped chuck needs to be clamped on the outer edge of the shaft part, and then the shaft part is installed on the top of the cylindrical grinder.

[0004] In the process of realizing the utility model, the inventors found that there are at least the following problems in the prior art: for some parts made of softer materials, indentations are easily generated at the contact position between the outer circle and the heart-shaped chuck. In addition, the use of the heart-shaped chuck consumes a lot of disassembly and assembly time, reducing processing efficiency. Utility Model Content

[0005] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0006] Therefore, the purpose of the utility model is to provide a transmission tooling for cylindrical grinding of shaft parts, which will not clamp the shaft parts, is convenient for clamping, and improves processing efficiency.

[0007] In order to achieve the above-mentioned purpose, the utility model proposes a transmission tooling for cylindrical grinding of shaft parts, comprising:

[0008] A transmission sleeve, wherein the transmission sleeve is provided with a first center hole, and the transmission sleeve is provided with at least one transmission claw extending in the axial direction on the outer periphery of the first center hole, and the transmission claw is used to extend into the keyway of the shaft part;

[0009] The clamp body is coaxially and detachably connected to the transmission sleeve, and the clamp body is provided with a second center hole, which is communicated with the first center hole.

[0010] According to the transmission tooling for cylindrical grinding of shaft parts of the utility model, by designing the clamp body and the transmission sleeve separately, the corresponding transmission sleeve can be replaced according to different types of cylindrical grinding of shaft parts, thereby expanding the scope of application. The utility model sets an axially extending transmission claw on the transmission sleeve, and after the transmission claw is inserted into the keyway of the shaft part, the main shaft can drive the shaft part to rotate synchronously after rotation. Compared with the clamping of the chicken heart chuck, the clamping is convenient, the outer circle will not be clamped, the processing efficiency is improved, the force on the main shaft bearing of the cylindrical grinding can be more uniform, and the processing accuracy of the shaft parts is improved.

[0011] According to an embodiment of the present utility model, the number of the transmission claws is two, and they are symmetrically distributed along two sides of the first center hole.

[0012] According to an embodiment of the utility model, a front end of the transmission claw is provided with a curved surface.

[0013] According to an embodiment of the utility model, the transmission sleeve further includes an integrally formed first disc and a first step portion, the first disc is provided with a plurality of first fasteners along the circumferential direction, and the transmission claw is provided on an end surface of the first step portion.

[0014] According to an embodiment of the present utility model, the clamp body includes an integrally formed second disc and a second step portion, the second step portion is provided with a plurality of mounting holes along the circumferential direction, and the first fastener is threadedly connected to the mounting holes.

[0015] According to an embodiment of the present invention, the second disc is provided with a plurality of second fasteners along the circumferential direction.

[0016] According to an embodiment of the present invention, the second step portion has a side wall, and a plurality of cutting fluid discharge holes are arranged around the side wall.

[0017] According to an embodiment of the present utility model, the second step portion and the first disc are matched with each other to form a stopper.

[0018] According to an embodiment of the utility model, a circular groove is provided on the inner wall of the second step portion, and an annular protrusion is provided on the end of the second disc close to the clamp body, the circular groove is an outer stop, and the annular protrusion is an inner stop.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Various other advantages and benefits will become apparent to those skilled in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only used for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. In addition, the same reference symbols are used throughout the accompanying drawings to represent the same components. Among them:

[0021] Figure 1 It is a front structural schematic diagram of a transmission tooling for cylindrical grinding of shaft parts in one embodiment of the utility model.

[0022] Figure 2 It is a schematic diagram of the back structure of a transmission tooling for cylindrical grinding of shaft parts in one embodiment of the utility model.

[0023] Figure 3 The utility model is a schematic structural diagram of a clamping body of a transmission tooling for cylindrical grinding of shaft parts in one embodiment of the utility model.

[0024] Figure 4 The utility model is a schematic structural diagram of a transmission sleeve of a transmission tool for cylindrical grinding of shaft parts in one embodiment of the utility model.

[0025] Figure 5 It is a front structural schematic diagram of the connection between the transmission tooling for cylindrical grinding of shaft parts and the flange in one embodiment of the utility model.

[0026] Figure 6 The utility model is a schematic diagram of the use state of the transmission tooling for cylindrical grinding of shaft parts in one embodiment of the utility model.

[0027] Description of reference numerals:

[0028] 1-transmission sleeve, 2-clamp body, 11-first disc, 12-transmission claw, 13-first fastener, 14-first center hole, 15-first step portion, 16-annular protrusion, 21-second disc, 22-second fastener, 23-cutting fluid discharge hole, 24-second center hole, 25-second step portion, 26-mounting hole, 27-circular groove, 200-flange, 201-first center, 300-second center, 400-shaft parts. DETAILED DESCRIPTION

[0029] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. On the contrary, the embodiments of the present invention include all changes, modifications and equivalents that fall within the spirit and connotation of the appended claims.

[0030] Reference below Figures 1 to 6 , describing the transmission tooling for cylindrical grinding of shaft parts according to the embodiment of the utility model.

[0031] Combination Figures 1 to 6 As shown, the transmission tooling for cylindrical grinding of shaft parts according to the embodiment of the utility model comprises a transmission sleeve 1 and a clamp body 2. The transmission sleeve 1 is provided with a first center hole 14, and the transmission sleeve 1 is provided with at least one transmission claw 12 extending in the axial direction on the outer periphery of the first center hole 14, and the transmission claw 12 is used to extend into the keyway of the shaft part 400. The clamp body 2 is coaxially detachably connected to the transmission sleeve 1, and the clamp body 2 is provided with a second center hole 24, and the second center hole 24 is communicated with the first center hole 14.

[0032] When the transmission tooling for cylindrical grinding of shaft parts of the embodiment of the utility model is used, it needs to be installed on the flange 200, which is a component of the grinding machine. The middle part of the flange is provided with a first center 201. After the first center 201 passes through the second center hole 24 and the first center hole 14, it abuts against one center hole of the shaft part 400, and the other center hole of the shaft part 400 abuts against another center on the grinding machine, namely, the second center 300. It should be noted that the keyway and the transmission claw 12 are clearance fit, which is easy to disassemble and assemble.

[0033] The transmission claw 12 can be made into a convex key shape, or other shapes such as a semicircle, and is designed according to the shape of the keyway on the shaft part. The transmission sleeve 1 and the clamp body 2 are both disc-shaped as a whole, with a circular cross-section, and the force is evenly transmitted, reducing local concentrated stress. The transmission sleeve 1 and the clamp body 2 can be connected in the form of bolts, buckles, etc. to form a transmission tooling for external cylindrical grinding of the entire shaft part.

[0034] According to the transmission tooling for cylindrical grinding of shaft parts in the embodiment of the utility model, by designing the clamp body and the transmission sleeve separately, the corresponding transmission sleeve can be replaced according to different types of cylindrical grinding of shaft parts, thereby expanding the scope of application. In the embodiment of the utility model, an axially extending transmission claw is arranged on the transmission sleeve, and after the transmission claw is inserted into the keyway of the shaft part, the main shaft can drive the shaft part to rotate synchronously after rotation. Compared with the clamping of the chicken heart chuck, the clamping is convenient, the outer circle will not be clamped, the processing efficiency is improved, the force on the main shaft bearing of the cylindrical grinding can be more uniform, and the processing accuracy of the shaft parts is improved.

[0035] In some embodiments, Figure 1 As shown, there are two transmission claws 12, which are symmetrically distributed along the two sides of the first center hole 14, so that the dynamic force is balanced after rotation, reducing the eccentric swing and vibration. The two transmission claws have higher structural strength and are not easy to break. In one example, the front end of the transmission claw 12 is provided with a curved surface. On the one hand, it reduces stress concentration, and on the other hand, it is conducive to aligning the keyway and realizing assembly guidance.

[0036] like Figure 1 As shown, the transmission sleeve 1 also includes an integrally formed first disc 11 and a first step portion 15. The first disc 11 is provided with a plurality of first fasteners 13 along the circumferential direction, and the transmission claw 12 is provided on the end surface of the first step portion 15. The first step portion 15 is coaxially arranged with the first disc 11, and the first step portion 15 is annular as a whole. The first step portion 15 can bear loads and improve the strength of the transmission sleeve 1. It should be noted that

[0037] like Figure 3As shown, the clamp body 2 includes an integrally formed second disc 21 and a second step portion 25, the second step portion 25 is provided with a plurality of mounting holes 26 along the circumferential direction, and the first fastener 13 is threadedly connected to the mounting hole 26. The second disc 21 and the second step portion 25 are coaxially arranged. The second step portion 25 is a shell structure, and the second disc 21 and the second step portion 25 have a recess on the side away from the transmission sleeve 1, which can accommodate the first tip 201. The second step portion 25 has a side wall, and a plurality of cutting fluid discharge holes 23 are arranged around the side wall. During the external cylindrical grinding process, the cutting fluid needs to be continuously sprayed to the part to be processed, and the cutting fluid discharge holes 23 can discharge metal chips and cutting fluid, keep it clean, and avoid damage to the tool caused by accumulation of chips.

[0038] In addition, the second disc 21 is provided with a plurality of second fasteners 22 along the circumferential direction for connecting with the flange 200 .

[0039] In some embodiments, in combination Figure 3 and Figure 4 As shown, there is a stopper fit between the second step portion 25 and the first disc 11. The stopper fit can prevent the second step portion 25 and the first disc 11 from moving in the radial direction, while allowing movement or assembly in the axial direction. The stopper fit can usually be achieved by using a protrusion and a groove. In one example, a circular groove 27 is provided on the inner wall of the second step portion 25, and an annular protrusion 16 is provided at one end of the second disc 2 close to the clamp body 2, the circular groove 27 is an outer stopper, and the annular protrusion 16 is an inner stopper. Ensure that the transmission sleeve 1 and the clamp body 2 are in the correct position and direction. During the assembly process, the stopper can serve as a guide to facilitate correct placement.

[0040] The use process of the transmission tooling for cylindrical grinding of shaft parts in the embodiment of the utility model is briefly described as follows:

[0041] Step S1, the transmission sleeve is installed on the clamp body to form an integrated transmission tooling. Note that the length of the transmission sleeve needs to be designed and manufactured according to the length of the first tip and the depth of the center hole of the processed shaft part to ensure that the transmission claw can normally extend into the keyway of the shaft part (to ensure that it does not affect the external cylindrical grinding, the distance between the outer edges of the two transmission claws must be smaller than the outer diameter of the shaft part), and there is no interference between the axial direction and the tail end of the keyway;

[0042] Step S2, when clamping, the second centering point retreats, the center hole of the shaft part is placed in the first centering point, and at the same time, the transmission claw extends into the keyway, and the second centering point moves forward to press the shaft part tightly;

[0043] Step S3, after the safety door is closed, the machining program is started, the spindle rotates, driving the transmission tooling to rotate, thereby driving the shaft parts to rotate, and the grinding wheel rotates and feeds the external cylindrical grinding process;

[0044] Step S4, after the processing is completed, the second center is returned and the processed shaft parts are taken out for inspection.

[0045] It should be noted that, in the description of the present invention, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more.

[0046] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; 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.

[0047] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0048] In the description of the present invention, the directions or positional relationships indicated by the terms "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0049] Any process or method description in the flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present invention belong.

[0050] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" 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 utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0051] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A transmission tool for cylindrical grinding of shaft parts, characterized in that: include: A transmission sleeve (1), the transmission sleeve (1) being provided with a first center hole (14), the transmission sleeve (1) being provided with at least one transmission claw (12) extending in the axial direction on the outer periphery of the first center hole (14), the transmission claw (12) being used for extending into a keyway of a shaft-type part; A clamp body (2), wherein the clamp body (2) is coaxially detachably connected to the transmission sleeve (1), and the clamp body (2) is provided with a second center hole (24), and the second center hole (24) is connected to the first center hole (14).

2. The transmission tooling for cylindrical grinding of shaft parts according to claim 1 is characterized in that: The number of the transmission claws (12) is two, and they are symmetrically distributed along both sides of the first central hole (14).

3. The transmission tooling for cylindrical grinding of shaft parts according to claim 1, characterized in that: The front end of the transmission claw (12) is provided with a curved surface.

4. The transmission tooling for cylindrical grinding of shaft parts according to claim 1, characterized in that: The transmission sleeve (1) further comprises an integrally formed first disc (11) and a first step portion (15); the first disc (11) is provided with a plurality of first fasteners (13) along the circumferential direction; and the transmission claw (12) is provided on an end surface of the first step portion (15).

5. The transmission tooling for cylindrical grinding of shaft parts according to claim 4 is characterized in that: The clamp body (2) comprises an integrally formed second disc (21) and a second step portion (25); the second step portion (25) is provided with a plurality of mounting holes (26) along the circumferential direction; and the first fastener (13) is threadedly connected to the mounting holes (26).

6. The transmission tooling for cylindrical grinding of shaft parts according to claim 5, characterized in that: The second disc (21) is provided with a plurality of second fasteners (22) along the circumferential direction.

7. The transmission tooling for cylindrical grinding of shaft parts according to claim 5, characterized in that: The second step portion (25) has a side wall, and a plurality of cutting fluid discharge holes (23) are arranged around the side wall.

8. The transmission tooling for cylindrical grinding of shaft parts according to claim 5, characterized in that: The second step portion (25) and the first disc (11) are fitted with a stopper.

9. The transmission tooling for cylindrical grinding of shaft parts according to claim 5, characterized in that: The inner wall of the second step portion (25) is provided with a circular groove (27); the second disc (21) is provided with an annular protrusion (16) at one end close to the clamp body (2); the circular groove (27) is an outer stop, and the annular protrusion (16) is an inner stop.

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