Machining tool for gear inner key groove

Abstract

The utility model provides a machining tool for an internal key groove of a gear. The machining tool comprises a broaching machine flange plate, the broaching machine guide sleeve is arranged on the broaching machine flange plate in a sleeving mode, a through open groove is formed in the broaching machine guide sleeve, and the broaching machine guide sleeve is used for being sleeved with a gear; the positioning assembly can be arranged on the broaching machine flange plate in a sliding mode along an arc line, the positioning assembly is provided with positioning teeth, the positioning teeth are matched with tooth grooves of the gear, and the tooth surfaces of the positioning teeth can be in complete contact with the tooth groove surfaces of the gear. The positioning assembly is arranged and provided with the positioning groove matched with the tooth groove of the gear, the tooth surface of the positioning tooth can be in complete contact with the tooth groove surface of the gear, and therefore gapless positioning of the positioning block and the gear to be machined is achieved, and machining precision is improved. The positioning assembly can be arranged on the broaching machine flange plate in the mode of sliding along the arc line, the angle between the gear key groove and the tooth groove can be adjusted by changing the relative position of the positioning assembly and the broaching machine flange plate, operation is easy and convenient, and machining efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing, in particular to a processing tool for a keyway inside a gear. Background Art

[0002] The gear keyway is an important part of the gear and is usually located on the gear shaft. Its main function is to connect the gear and the shaft, ensuring that the gear can be firmly fixed on the shaft and rotate and transmit smoothly. The angle between the center line of the gear keyway and the center line of the gear tooth groove (hereinafter referred to as the angle between the gear keyway and the tooth groove) usually has an angle requirement.

[0003] In the prior art, a matching gear is required, which is fixed on a fixture, and the gear to be processed is meshed with the positioning teeth on the matching gear. After the positioning tooth surface is positioned with the gear to be processed, the internal keyway is processed.

[0004] In the process of realizing the utility model, the inventors found that there are at least the following problems in the prior art: since the tooth surface of the positioning tooth and the tooth surface of the gear to be processed are clearance-matched, the processing accuracy is not high. 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 tool for processing the keyway in the gear, which is easy to operate and improves the processing efficiency and processing accuracy.

[0007] In order to achieve the above-mentioned purpose, the utility model proposes a tooling for machining a keyway in a gear, comprising:

[0008] Broaching machine flange;

[0009] A broaching machine guide sleeve, which is sleeved on the broaching machine flange, and the broaching machine guide sleeve is provided with a through opening groove, and the broaching machine guide sleeve is used for sleeve-mounting the gear;

[0010] The positioning assembly can be slidably arranged on the flange of the broaching machine along an arc. The positioning assembly has positioning teeth, which are adapted to the tooth grooves of the gears. The tooth surfaces of the positioning teeth can be in full contact with the tooth groove surfaces of the gears.

[0011] According to the processing tool for the keyway in the gear of the utility model, by setting a positioning component, the positioning component has a positioning groove adapted to the gear tooth groove, and the tooth surface of the positioning tooth can be in full contact with the tooth groove surface of the gear, so that the positioning block and the gear to be processed can be positioned without gap, thereby improving the processing accuracy. The positioning component in the utility model can be slidably arranged on the flange of the broaching machine along an arc, and the angle between the gear keyway and the tooth groove can be adjusted by changing the relative position of the positioning component and the flange of the broaching machine, which is easy to operate and improves the processing efficiency.

[0012] According to an embodiment of the present invention, a through hole is provided at the center of the flange of the broaching machine.

[0013] According to an embodiment of the utility model, the broaching machine guide sleeve comprises a first cylindrical section, a support portion and a second cylindrical section which are sequentially connected from top to bottom, and the diameter of the support portion is greater than the diameter of the through hole.

[0014] According to one embodiment of the utility model, the broaching machine flange further comprises:

[0015] A sinking sector is provided on the top surface of the flange of the broaching machine;

[0016] An arc-shaped hole is provided in the sinking sector;

[0017] A waist-shaped hole is provided at the edge of the flange of the broaching machine;

[0018] The guide sleeve is arranged at the center of the bottom surface of the flange of the broaching machine.

[0019] According to one embodiment of the utility model, the positioning assembly includes:

[0020] A positioning sleeve, arranged above the arc-shaped hole;

[0021] The positioning block is arranged in the positioning sleeve and is slidably connected with the positioning sleeve along the radial direction. The positioning teeth are arranged at the inner end of the positioning block.

[0022] According to an embodiment of the present invention, the center of the arc-shaped hole is concentric with the center of the through hole, and the center angle of the arc-shaped hole is 30 degrees to 90 degrees.

[0023] According to an embodiment of the utility model, the positioning sleeve is provided with a groove, the positioning block is arranged in the groove, and the side surface of the positioning block contacts the inner surface of the groove.

[0024] According to an embodiment of the utility model, the positioning assembly further comprises: a pressing plate, the pressing plate having a baffle extending downward, the pressing plate being arranged on the positioning sleeve, and the pressing plate being provided with a strip groove.

[0025] According to an embodiment of the utility model, a handle is provided on the positioning block, and the handle passes through the strip groove and is limited by the strip groove.

[0026] According to an embodiment of the utility model, an elastic member is provided between the baffle and the positioning block.

[0027] 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

[0028] 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:

[0029] Figure 1 The utility model is a schematic structural diagram of a tooling for machining a keyway in a gear according to an embodiment of the utility model.

[0030] Figure 2 The utility model is an exploded schematic diagram of a tooling for machining a keyway in a gear according to an embodiment of the utility model.

[0031] Figure 3 This is a schematic diagram of the exploded view of the tooling used for processing the keyway inside the gear from another angle.

[0032] Figure 4 It is a schematic diagram of the utility model after the processing tooling for the keyway inside the gear is installed on the gear.

[0033] Description of reference numerals:

[0034] 10- broaching machine guide sleeve, 11- opening groove, 12- first cylindrical section, 13- supporting part, 14- second cylindrical section, 20- pressing plate, 21- strip groove, 22- baffle, 30- handle, 40- positioning block, 41- positioning tooth, 50- positioning sleeve, 51- groove, 52- inner arc surface, 53- screw, 54- nut, 60- broaching machine flange, 62- sinking sector, 63- arc hole, 64- waist hole, 65- guide sleeve, 70- elastic part, 100- processing tooling for the keyway in the gear, 200- gear, 201- keyway. DETAILED DESCRIPTION

[0035] 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.

[0036] Combination Figures 1 to 4 As shown, the embodiment of the utility model provides a processing tool 100 for the keyway in the gear, comprising: a broaching machine flange 60, a broaching machine guide sleeve 10 and a positioning assembly. The broaching machine guide sleeve 10 is sleeved on the broaching machine flange 60, and a through opening groove 11 is provided on the broaching machine guide sleeve 10, and the broaching machine guide sleeve 10 is used to sleeve the gear 200. The positioning assembly can be slidably arranged on the broaching machine flange 60 along an arc, and the positioning assembly has a positioning tooth 41, and the positioning tooth 41 is adapted to the tooth groove of the gear 200, and the tooth surface of the positioning tooth 41 can be completely in contact with the tooth groove surface of the gear 200.

[0037] The broaching machine flange 60 is used to connect with the mounting platform of the broaching machine. The broaching machine guide sleeve 10 is detachably connected to the broaching machine flange 60, which can be connected by threaded connection, key connection or pin connection. The cross section of the opening slot 11 is rectangular, which can accommodate the sawtooth tool to pass through. The length of the opening slot is determined according to the maximum height of the cutter teeth and the length of the gear keyway. The positioning assembly is also detachably connected to the broaching machine flange 60, for example, by threaded connection.

[0038] It is understandable that the teeth and center hole of the gear 200 have been processed, and the type of the gear 200 can be a spur gear or a helical gear. The number of positioning teeth 41 is 1, and through the marking and sliding of the positioning component, the positioning tooth 41 can cooperate with a tooth groove on the gear 200 within a certain range, so that the angle between the gear keyway to be processed and the tooth groove meets the processing requirements. The teeth on the serrated tool are sequentially longer from bottom to top. During processing, the serrated tool passes through the opening groove 11 and moves from top to bottom to realize the processing and forming of the keyway 201.

[0039] According to the processing tool for the keyway in the gear of the embodiment of the utility model, by setting a positioning component, the positioning component has a positioning groove adapted to the gear tooth groove, and the tooth surface of the positioning tooth can be in full contact with the tooth groove surface of the gear, so that the positioning block and the gear to be processed can be positioned without gap, thereby improving the processing accuracy. The positioning component of the embodiment of the utility model can be slidably arranged on the broaching machine flange along an arc, and the angle between the gear keyway and the tooth groove can be adjusted by changing the relative position of the positioning component and the broaching machine flange, which is easy to operate and improves the processing efficiency.

[0040] In some embodiments, the center of the broaching machine flange 60 has a through hole. The broaching machine guide sleeve 10 includes a first cylindrical section 12, a support portion 13, and a second cylindrical section 14 connected in sequence from top to bottom, and the diameter of the support portion 13 is larger than the diameter of the through hole. The first cylindrical section 12 serves as a positioning mandrel, and its outer diameter is less than or equal to the inner diameter of the inner hole of the gear 200 so that the gear 200 can be inserted. The outer diameter of the second cylindrical section 14 is less than or equal to the inner diameter of the through hole.

[0041] Combination Figure 2 , Figure 3 As shown, the broaching machine flange 60 also includes a sinking sector 62, an arc hole 63, a waist hole 64 and a guide sleeve 65. The sinking sector 62 is arranged on the top surface of the broaching machine flange 60. The sinking sector 62 adopts a sinking design, and the side walls on both sides thereof can limit the maximum movement range of the positioning assembly. The arc hole 63 is arranged in the sinking sector 62. The center of the arc hole 63 is concentric with the center of the through hole. The center angle of the arc hole 63 can be set according to actual needs, and there is no restriction on this. Exemplarily, the center angle of the arc hole 63 is 30 degrees to 90 degrees, which meets the adjustment requirements of the angle between the gear keyway and the tooth groove. The waist hole 64 is arranged at the edge of the broaching machine flange 60. The number of the waist holes 64 is not less than two. The waist holes 64 are used to align with the threaded holes on the broaching machine and then fix them with bolts. The guide sleeve 65 is arranged at the center of the bottom surface of the broaching machine flange 60 , and the guide sleeve 65 can be engaged with the mounting hole on the broaching machine.

[0042] In some embodiments, the positioning assembly in the tooling for machining the keyway in the gear includes a positioning sleeve 50 and a positioning block 40. The positioning sleeve 50 is arranged above the arc hole 63. The positioning block 40 is arranged in the positioning sleeve 50, and is slidably connected with the positioning sleeve 50 in the radial direction, and the positioning teeth 41 are arranged at the inner end of the positioning block 40. The positioning sleeve 50 is connected to the arc hole 63 by a screw 53, and a nut 54 is provided at the part where the screw 53 protrudes from the positioning block 40. The positioning block 40 can also be connected to the positioning sleeve 50 using fasteners. In order to achieve the connection in the radial direction, a notch extending in the radial direction is provided on the positioning block 40 or the positioning sleeve 50.

[0043] In one example, the positioning sleeve 50 is provided with a groove 51, the positioning block 40 is provided in the groove 51, the side of the positioning block 40 contacts the inner surface of the groove 51, and the positioning block 40 can limit the movement of the positioning block 40 in a direction perpendicular to the radial direction, thereby improving the positioning accuracy of the positioning block 40. The side of the positioning sleeve 50 close to the guide sleeve 10 of the broaching machine is an inner arc surface 52 to avoid interference with the guide sleeve 10 of the broaching machine when moving in the circumferential direction.

[0044] The positioning assembly also includes a pressing plate 20, which has a baffle plate 22 extending downward. The pressing plate 20 is arranged on the positioning sleeve 50, and a strip groove 21 is provided on the pressing plate 20. A handle 30 is provided on the positioning block 40, and the handle 30 passes through the strip groove 21 and is limited by the strip groove 21. The arrangement direction of the center line of the strip groove 21 is radial. The handle 30 provides a comfortable gripping point for the operator. The baffle plate 22 is in close contact with the outer side surface of the positioning sleeve 50, limiting the minimum radial outward movement range of the positioning block 40.

[0045] An elastic member 70 is provided between the baffle 22 and the positioning block 40. The elastic member 70 may be a spring or a rubber block. The elastic member 70 generates a pre-tightening force under the extrusion of the positioning block 40, so that the positioning tooth 41 and the tooth groove of the gear are kept in close contact after the positioning block 40 is released, thereby improving the convenience of operation.

[0046] The method of using the tooling for processing the inner keyway of the gear in this embodiment is briefly described as follows:

[0047] S101, after the processing tooling is assembled, the angle between the tooth 41 and the opening slot 11 is located by three coordinates or a universal inspection fixture, and it can be used only after the angle is qualified;

[0048] S102, install the guide sleeve 65 of the broaching machine flange 60 in the broaching machine installation hole, align the waist-shaped hole 64 with the broaching machine connecting threaded hole, and then lock the processing tooling with bolts;

[0049] S103, the handle 30 is pulled to move the positioning block 40 outward, and the elastic member 70 is compressed;

[0050] S104, placing the gear 200 to be processed on the first cylindrical section 12 of the guide sleeve 10 of the broaching machine;

[0051] S105, release the handle 30, and the elastic member 70 presses the positioning block 40 into the tooth groove;

[0052] S106, placing the broach into the opening groove 11, and clamping the broach handle with a broach clamp;

[0053] S107, start the broaching machine to perform broaching.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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 tool for machining a keyway in a gear, characterized in that: include: Broaching machine flange (60); A broaching machine guide sleeve (10) is sleeved on the broaching machine flange (60), the broaching machine guide sleeve (10) is provided with a penetrating opening groove (11), and the broaching machine guide sleeve (10) is used for sleeve-mounting a gear (200); A positioning assembly can be slidably arranged on the broaching machine flange (60) along an arc, and the positioning assembly has a positioning tooth (41), the positioning tooth (41) is adapted to the tooth groove of the gear (200), and the tooth surface of the positioning tooth (41) can be in full contact with the tooth groove surface of the gear (200).

2. The tooling for machining the inner keyway of a gear according to claim 1, characterized in that: The center of the broaching machine flange (60) is provided with a through hole.

3. The tooling for machining the inner keyway of a gear according to claim 2, characterized in that: The broaching machine guide sleeve (10) comprises a first cylindrical section (12), a support portion (13) and a second cylindrical section (14) which are connected in sequence from top to bottom, and the diameter of the support portion (13) is greater than the diameter of the through hole.

4. The tooling for machining the inner keyway of a gear according to claim 2, characterized in that: The broaching machine flange (60) further comprises: A sinking sector (62) is provided on the top surface of the broaching machine flange (60); An arc-shaped hole (63) is provided in the sinking sector (62); A waist-shaped hole (64) is provided at the edge of the broaching machine flange (60); The guide sleeve (65) is arranged at the center of the bottom surface of the broaching machine flange (60).

5. The tooling for machining the inner keyway of a gear according to claim 4, characterized in that: The positioning component comprises: A positioning sleeve (50) is arranged above the arc-shaped hole (63); The positioning block (40) is arranged in the positioning sleeve (50) and is slidably connected to the positioning sleeve (50) along the radial direction. The positioning teeth (41) are arranged at the inner end of the positioning block (40).

6. The tooling for machining the inner keyway of a gear according to claim 4, characterized in that: The center of the arc-shaped hole (63) is concentric with the center of the through hole, and the center angle of the arc-shaped hole (63) is 30 degrees to 90 degrees.

7. The tooling for machining the inner keyway of a gear according to claim 5, characterized in that: The positioning sleeve (50) is provided with a groove (51), the positioning block (40) is arranged in the groove (51), and the side surface of the positioning block (40) contacts the inner surface of the groove (51).

8. The tooling for machining the inner keyway of a gear according to claim 7, characterized in that: The positioning assembly further comprises: a pressing plate (20), the pressing plate (20) having a baffle (22) extending downward, the pressing plate (20) being arranged on the positioning sleeve (50), and the pressing plate (20) being provided with a strip groove (21).

9. The tooling for machining the inner keyway of a gear according to claim 8, characterized in that: The positioning block (40) is provided with a handle (30), and the handle (30) passes through the strip groove (21) and is limited by the strip groove (21).

10. The tooling for machining the inner keyway of a gear according to claim 9, characterized in that: An elastic member (70) is provided between the baffle (22) and the positioning block (40).

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