A cutting device for gear machining

Abstract

The application discloses a cutting device for gear machining and relates to the technical field of gear cutting. The cutting device comprises a cutting unit, a C-shaped block arranged on one side of a feeding assembly, a driving rod penetratingly arranged in the C-shaped block, a driven rod and a driving disc sleeved on the outer wall of the driving rod, a pushing rod sleeved on the outer wall of the driven rod, and a hob sleeved on the outer wall of the pushing rod. The application has the beneficial effect that the left and right switching of the hob can be realized, the cutter teeth at each point can be fully utilized and replaced, the cutter teeth at the same point are prevented from being used for a long time, the influence of wear, high pressure and high temperature is reduced, and the service life of the cutter is prolonged. In addition, when cutter collision occurs, the damage of the cutter and the workpiece can be reduced, and the situation that metal fragments splash and injure people under severe impact can be effectively avoided.

Description

Technical Field

[0001] This invention relates to the field of gear cutting technology, and in particular to a cutting device for gear machining. Background Technology

[0002] Gear machining technology is a core part of the machinery manufacturing field, and is currently mainly divided into two categories: cutting and plastic forming. In cutting, forming and generating methods are the two main processing methods. Among them, plastic forming processes, such as gear precision forging, are considered to be the development trend of gear machining due to their advantages such as high material utilization and high production efficiency, while generating methods are more common due to their convenience and wide application.

[0003] Rapid hob wear typically occurs in high-pressure, high-temperature machining environments, especially in dry cutting processes without coolant assistance, or when cutting parameters are improperly set or the hob material and coating are not selected appropriately. If operational errors, machine tool malfunctions, tool installation problems, or improper workpiece clamping occur during cutting, it can lead to tool collisions, potentially resulting in tool damage, workpiece scrap, and even endangering personal safety. Summary of the Invention

[0004] In view of the problems existing in the above or prior art, the present invention is proposed.

[0005] Therefore, the object of the present invention is to provide a cutting device for gear processing that can solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a cutting device for gear processing, comprising an adjustment unit, including a base, a clamping assembly disposed at one end of the base, and a feed assembly disposed at the other end of the base;

[0007] The cutting unit includes a C-block disposed on one side of the feed assembly, a drive rod disposed through the inside of the C-block, a driven rod and a drive disk sleeved on the outer wall of the drive rod, a push rod sleeved on the outer wall of the driven rod, and a hob sleeved on the outer wall of the push rod.

[0008] As a preferred embodiment of the gear processing cutting device of the present invention, the base includes a first support platform disposed on one side of its surface, a second support platform disposed on the other side of the base surface, and at least one sliding groove disposed on the side wall of the second support platform.

[0009] As a preferred embodiment of the gear processing cutting device of the present invention, the clamping assembly includes a three-jaw caliper disposed on the upper surface of the first support table and a motor disposed on the bottom of the first support table.

[0010] The motor can drive the three-jaw caliper to rotate on the surface of the first support platform.

[0011] As a preferred embodiment of the gear machining cutting device of the present invention, the feed assembly includes a push rod disposed on the upper end of the second support platform and a slide table disposed on the actuating end of the push rod;

[0012] The slide includes a pair of fixed plates, a push plate disposed on the surface of one of the fixed plates, and a plurality of connecting columns disposed between the fixed plates.

[0013] As a preferred embodiment of the gear machining cutting device of the present invention, the C-block includes a square hole disposed at one end thereof and a cylindrical hole disposed at the other end thereof.

[0014] In a preferred embodiment of the gear machining cutting device of the present invention, the drive rod includes a first limiting ring disposed at one end thereof, a bushing disposed at the other end of the drive rod, and a first limiting rail disposed on one side of the bushing.

[0015] As a preferred embodiment of the gear processing cutting device of the present invention, the driven rod includes a second limiting ring disposed at one end thereof, a second limiting rail disposed on one side of the second limiting ring, a first toothed disc disposed at the other end of the driven rod, and a cam groove disposed on the outer wall of the driven rod.

[0016] The teeth on the first tooth insert are triangular.

[0017] As a preferred embodiment of the gear processing cutting device of the present invention, the drive disk includes a second toothed disc, a spring disposed on one side of the drive disk, and a first limiting strip disposed on the inner wall of the second toothed disc;

[0018] The second tooth insert has the same tooth shape as the first tooth insert.

[0019] As a preferred embodiment of the gear machining cutting device of the present invention, the push rod includes a third limiting ring disposed at one end thereof, a square rod disposed at the other end of the push rod, and a protrusion disposed on the inner wall of the push rod.

[0020] As a preferred embodiment of the gear machining cutting device of the present invention, the hob includes a limiting groove disposed at one end of its inner wall and a second limiting strip disposed at the end opening of the hob.

[0021] The beneficial effects of this invention are as follows: This invention enables the left and right switching of the hob, so that the cutting teeth at each point can be fully utilized and rotated, avoiding the long-term use of the cutting teeth at the same point, reducing wear and the effects of high pressure and high temperature, and extending the service life of the cutting tool. In addition, when a collision occurs, the transmission can be interrupted in time to buffer the impact, reduce damage to the cutting tool and the workpiece, protect the drive source, and effectively prevent metal fragments from flying and injuring people under violent impact. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is an overall three-dimensional view of the present invention.

[0024] Figure 2 This is an exploded view of the entire invention.

[0025] Figure 3 This is an exploded view of the cutting unit of the present invention.

[0026] Figure 4 This is a structural diagram of the cutting unit of the present invention.

[0027] Figure 5 This is a full sectional view of the cutting unit of the present invention. Detailed Implementation

[0028] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0029] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0030] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments.

[0031] Example 1

[0032] Reference Figures 1-5 This is the first embodiment of the present invention. This embodiment provides a cutting device for gear processing, which includes an adjustment unit 1, including a base 11, a clamping assembly 12 disposed at one end of the base 11, and a feed assembly 13 disposed at the other end of the base 11.

[0033] The cutting unit 2 includes a C-block 21 disposed on one side of the feed assembly 13, a drive rod 22 disposed through the inside of the C-block 21, a driven rod 23 and a drive disk 24 sleeved on the outer wall of the drive rod 22, a push rod 25 sleeved on the outer wall of the driven rod 23, and a hob 26 sleeved on the outer wall of the push rod 25.

[0034] Furthermore, the base 11 includes a first support platform 111 disposed on one side of its surface, a second support platform 112 disposed on the other side of the surface of the base 11, and at least one slide groove 113 disposed on the side wall of the second support platform 112.

[0035] Furthermore, the clamping assembly 12 includes a three-jaw caliper 121 disposed on the upper surface of the first support platform 111, and a motor 122 disposed on the bottom of the first support platform 111.

[0036] The motor 122 can drive the three-jaw caliper 121 to rotate on the surface of the first support platform 111.

[0037] Furthermore, the feed assembly 13 includes a push rod 131 disposed on the upper end of the second support platform 112, and a slide 132 disposed on the actuating end of the push rod 131;

[0038] The slide table 132 includes a pair of fixed plates 1321, a push plate 1322 disposed on the surface of one of the fixed plates 1321, and a plurality of connecting columns 1323 disposed between the fixed plates 1321.

[0039] Furthermore, the C-block 21 includes a square hole 211 disposed at one end and a cylindrical hole 212 disposed at the other end of the C-block 21.

[0040] Furthermore, the drive rod 22 includes a first limiting ring 221 disposed at one end thereof, a bushing 222 disposed at the other end of the drive rod 22, and a first limiting rail 223 disposed on one side of the bushing 222.

[0041] Furthermore, the driven rod 23 includes a second limiting ring 231 disposed at one end thereof, a second limiting rail 232 disposed on one side of the second limiting ring 231, a first toothed disc 233 disposed at the other end of the driven rod 23, and a cam groove 234 disposed on the outer wall of the driven rod 23.

[0042] The teeth on the first tooth disc 233 are triangular in shape.

[0043] Furthermore, the drive disk 24 includes a second toothed disc 241, a spring 242 disposed on one side of the drive disk 24, and a first limiting strip 243 disposed on the inner wall of the second toothed disc 241.

[0044] The second tooth inlay 241 has the same tooth shape as the first tooth inlay 233.

[0045] Furthermore, the push rod 25 includes a third limiting ring 251 disposed at one end, a square rod 252 disposed at the other end of the push rod 25, and a protrusion 253 disposed on the inner wall of the push rod 25.

[0046] Furthermore, the hob 26 includes a limiting groove 261 disposed at one end of its inner wall, and a second limiting strip 262 disposed at the end opening of the hob 26.

[0047] It should be noted that a first support platform 111 and a second support platform 112 are fixed on the surface of the base 11 respectively. The two support platforms have different heights, with the first support platform 111 being shorter. A motor 122 is fixed on its lower surface. The shaft end of the motor 122 passes through the first support platform 111 and is fixed to the bottom of the three-jaw caliper 121, so that the motor 122 can drive the three-jaw caliper 121 to rotate. A reducer can also be installed between the three-jaw caliper 121 and the motor 122 to ensure that the motor 122 has sufficient torque.

[0048] The three-jaw caliper 121 can clamp the gear from the center of the shaft hole.

[0049] The second support platform 112 is relatively high and consists of at least one horizontal plane and one vertical plane. A push rod 131 is fixed on the upper surface of the second support platform 112. In this embodiment, a hydraulic push rod is used, but an electric push rod or a pneumatic rod can also be used. The actuating end of the push rod 131 passes through the upper surface of the second support platform 112 and extends downward. Two symmetrically distributed sliding grooves 113 are formed on the vertical surface of the second support platform 112, and the sliding grooves 113 are through-hole.

[0050] Preferably, the slide table 132 is mainly composed of two fixed plates 1321, which are connected by two vertical rows of connecting columns 1323, with at least one connecting column 1323 in each row. Therefore, each vertical row of connecting columns 1323 can pass through the corresponding slide groove 113, allowing the slide table 132 to move along the slide groove 113. The two fixed plates 1321 are respectively in close contact with the openings of the slide groove 113 on both sides. A horizontally placed push plate 1322 is fixed on the fixed plate 1321 facing the push rod 131, which can be fixed to the actuating end of the push rod 131. The fixed plate 1321 on the other side can be used to fix the cutting unit 2.

[0051] When the actuator on push rod 131 extends or retracts, it can drive slide table 132 to move up and down.

[0052] Preferably, the C-block 21 has a gap on the side facing away from the push rod 131, and a through square hole 211 and a cylindrical hole 212 are respectively opened at both ends of the C-block 21. An annular groove is also opened on the inner wall of the cylindrical hole 212.

[0053] One end of the drive rod 22 is fixed with a first limiting ring 221, which can engage with an annular groove on the inner wall of the cylindrical hole 212, thus preventing the drive rod 22 from falling off while rotating. A bushing 222 is fixed to the other end of the drive rod 22, which can be fixed to the shaft end of other drive sources, including motors and internal combustion engines. On one side of the bushing 222, at least one first limiting rail 223 is also provided on the outer wall of the drive rod 22.

[0054] Preferably, the driven rod 23 is sleeved on the outer wall of the driving rod 22, and a second limiting ring 231 is fixed at one end of the driving rod 22. The outer diameter of the second limiting ring 231 is the same as the outer diameter of the first limiting ring 221, so it can also cooperate with the annular groove opened in the inner wall of the cylindrical hole 212, so that the driving rod 22 can rotate circumferentially about the driving rod 22 as an axis. In addition, the sum of the thicknesses of the first limiting ring 221 and the second limiting ring 231 is the same as the groove width of the annular groove in the cylindrical hole 212.

[0055] On one side of the second limiting ring 231, at least one second limiting rail 232 is also provided on the outer wall of the driven rod 23. The groove shape of the second limiting rail 232 and the first limiting rail 223 is not limited but is the same. At the other end of the second limiting ring 231, a first toothed disc 233 is fixed. The first toothed disc 233 has triangular teeth arranged circumferentially, and the teeth face the axial extension direction of the driven rod 23. In addition, a cam groove 234 with the ends connected is also provided on the outer wall of the driven rod 23.

[0056] Preferably, the drive disc 24 is composed of a second toothed disc 241 and a spring 242. The second toothed disc 241 has the same shape and size as the first toothed disc 233, but their teeth are distributed opposite each other. The drive disc 24 is sleeved on the side of the drive rod 22 with the bushing 222. The spring 242 is sleeved between the bushing 222 and the drive disc 24. Therefore, the force of the spring 242 can push the drive disc 24 against the first toothed disc 233. At least one first limiting strip 243 is fixed on the inner wall of the drive disc 24, which can cooperate with the first limiting rail 223, so that the drive rod 22 can drive the drive disc 24 to rotate when it rotates, and the drive disc 24 drives the driven rod 23 to rotate under the action of the spring 242.

[0057] Furthermore, since the drive disc 24 needs to disconnect from the first toothed disc 233 and retract against the force of the spring 242 when the driven rod 23 is suddenly stopped, the length of the first limit rail 223 is greater than the overall width of the drive disc 24.

[0058] Preferably, the push rod 25 is sleeved on the outer wall of the driven rod 23. A third limiting ring 251 is fixed to one end of the push rod 25, and a square rod 252 is fixed to the other end. The shape and size of the square rod 252 are consistent with the square hole 211, so the two can cooperate with each other. It should be noted that when the push rod 25 moves axially on the driven rod 23, the square rod 252 never disengages from the square hole 211, so the push rod 25 cannot rotate. On the inner wall of the push rod 25, a protrusion 253 with the same size as the width of the cam groove 234 is fixed. The protrusion 253 is always inserted into and cooperates with the cam groove 234. When the driven rod 23 rotates, the protrusion 253 can move within the cam groove 234, realizing the effect of reciprocating axial movement of the push rod 25 on the driven rod 23.

[0059] Preferably, the hob 26 is used for machining the gear blank in the gear blank generating method. It is sleeved on the outer wall of the round rod portion of the push rod 25. A limiting groove 261 is formed on the inner wall of one end of the hob 26, which can cooperate with the third limiting ring 251 to prevent the axial movement of the hob 26. On one side of the limiting groove 261, at least one second limiting strip 262 is fixed at the opening of the hob 26. The second limiting strip 262 can cooperate with the second limiting rail 232. When the driven rod 23 rotates, it can drive the hob 26 to perform rotary cutting. Since the push rod 25 can drive the hob 26 to move axially, the second limiting rail 232 also needs to have a relatively long distance to ensure the normal movement of the push rod 25.

[0060] In use, when machining the gear, the gear blank is clamped and fixed on the three-jaw caliper 121. The motor 122 drives the three-jaw caliper 121 to rotate, causing the gear blank to rotate as well. At this time, the cutting unit 2 is located at the upper end of the gear blank. It drives the drive rod 22 to rotate through other drive sources. Due to the action of the spring 242, the drive disk 24 meshes with the first toothed disc 233, so the driven rod 23 also rotates accordingly. Then, the rotation of the cam groove 234 drives the reciprocating movement of the protrusion 253. At this time, the push rod 25 also reciprocates accordingly without rotating, while the hob 26 is driven to rotate by the driven rod 23. Therefore, the hob 26 can rotate circumferentially and reciprocate, so that the cutting point changes continuously.

[0061] Then, the cutting unit 2 is driven to move downward by the push rod 131 and slowly cuts the edge of the gear blank. If the hob 26 collides with the gear, the hob 26 is stopped by the gear, and the driven rod 23 is also stopped accordingly. At this time, the drive disc 24 will retract under the resistance, thereby interrupting the power, reducing the impact caused by the collision, and also avoiding overload of the drive source.

[0062] In summary, this design enables the hob to switch between left and right, allowing the teeth at each point to be fully utilized and rotated. This avoids prolonged use of the same teeth at the same point, reduces wear and the effects of high pressure and high temperature, and extends the tool's service life. In addition, in the event of a collision, the transmission can be interrupted in time to buffer the impact, reducing damage to the tool and workpiece, protecting the drive source, and effectively preventing metal fragments from flying and injuring people under violent impact.

[0063] Importantly, the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A cutting apparatus for gear machining, characterized by: The adjusting unit (1) comprises a base (11), a clamping assembly (12) arranged at one end of the base (11), and a feeding assembly (13) arranged at the other end of the base (11); The cutting unit (2) comprises a C-shaped block (21) arranged at one side of the feeding assembly (13), a driving rod (22) arranged through the inside of the C-shaped block (21), a driven rod (23) and a driving disc (24) sleeved on the outer wall of the driving rod (22), a pushing rod (25) sleeved on the outer wall of the driven rod (23), and a hob (26) sleeved on the outer wall of the pushing rod (25); The C-shaped block (21) comprises a square hole (211) arranged at one end thereof, and a cylindrical hole (212) arranged at the other end of the C-shaped block (21); The driving disc (24) comprises a second toothed disc (241), a spring (242) arranged at one side of the driving disc (24), and a first limiting strip (243) arranged on the inner wall of the second toothed disc (241); The pushing rod (25) comprises a third limiting ring (251) arranged at one end thereof, a square rod (252) arranged at the other end of the pushing rod (25), and a protrusion (253) arranged on the inner wall of the pushing rod (25); The driving rod (22) comprises a first limiting ring (221) arranged at one end thereof, a shaft sleeve (222) arranged at the other end of the driving rod (22), and a first limiting rail (223) arranged at one side of the shaft sleeve (222); The driven rod (23) comprises a second limiting ring (231) arranged at one end thereof, a second limiting rail (232) arranged at one side of the second limiting ring (231), a first toothed disc (233) arranged at the other end of the driven rod (23), and a cam groove (234) arranged on the outer wall of the driven rod (23); The teeth on the first toothed disc (233) are triangular in shape; The hob (26) comprises a limiting groove (261) arranged on the inner wall at one end thereof, and a second limiting strip (262) arranged at the opening of the end portion of the hob (26); The first limiting ring (221) cooperates with the annular groove formed in the inner wall of the cylindrical hole (212); The outer diameter of the second limiting ring (231) is consistent with the outer diameter of the first limiting ring (221), and can cooperate with the annular groove formed in the inner wall of the cylindrical hole (212); A limiting groove (261) is formed on the inner wall at one end of the hob (26), and can cooperate with the third limiting ring (251); The inner wall of the pushing rod (25) is fixed with a protrusion (253) having a size consistent with the groove width of the cam groove (234), and the protrusion (253) is always inserted into and cooperates with the cam groove (234).

2. The gear cutting device according to claim 1, characterized in that: ​ The base (11) comprises a first support table (111) arranged on one side of the surface of the base (11), a second support table (112) arranged on the other side of the surface of the base (11), and at least one sliding groove (113) arranged on the side wall of the second support table (112).

3. The cutting device for gear machining according to claim 2, characterized in that: The clamping assembly (12) comprises a three-jaw chuck (121) arranged on the upper end of the surface of the first support table (111), and a motor (122) arranged at the bottom of the first support table (111); The motor (122) can drive the three-jaw chuck (121) to rotate on the surface of the first support table (111).

4. The cutting device for gear machining according to claim 3, characterized in that: The feeding assembly (13) comprises a push rod (131) arranged on the upper end of the second support table (112), and a sliding table (132) arranged on the execution end of the push rod (131); The sliding table (132) comprises a pair of fixed plates (1321), a push plate (1322) arranged on the surface of one of the fixed plates (1321), and a plurality of connecting columns (1323) arranged between the fixed plates (1321).

5. The cutting device for gear machining according to claim 4, characterized in that: The second toothed disc (241) is consistent with the tooth shape of the first toothed disc (233).

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