Cutting device for gear machining

Abstract

The invention discloses a cutting device for gear machining, and relates to the technical field of gear cutting, the cutting device comprises a cutting unit, the cutting unit comprises a C-shaped block arranged on one side of a feeding assembly, a driving rod arranged in the C-shaped block in a penetrating mode, a driven rod and a driving disc which are arranged on the outer wall of the driving rod in a sleeving mode, and a pushing rod arranged on the outer wall of the driven rod in a sleeving mode; and the hob is sleeved on the outer wall of the pushing rod. The hobbing cutter has the beneficial effects that left-right switching of the hobbing cutter can be achieved, cutter teeth on each point can be fully utilized and alternated, the cutter teeth on the same point are prevented from being used for a long time, the influences of abrasion, high pressure and high temperature are relieved, the service life of the cutter is prolonged, and in addition, when cutter collision occurs, the cutter teeth are prevented from being damaged. Damage to the cutter and the workpiece can be reduced, and the situation that metal fragments splash to hurt people under violent impact can be effectively avoided.

Description

Technical Field

[0001] The invention relates to the technical field of gear cutting, in particular to a cutting device for gear machining. Background Art

[0002] Gear processing technology is the core of the mechanical manufacturing field, and is currently divided into two categories: cutting and plastic forming. In cutting, forming and die forming 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 processing due to their advantages such as high material utilization and high production efficiency, while die forming is more common due to its convenience and wide application.

[0003] The situation of excessive wear of the hob usually occurs in high-pressure and high-temperature processing environments, especially in dry cutting processes without coolant assistance, or when the cutting parameters are improperly set, and the hob material and coating material are not properly selected. If the hob hits the cutting tool during the cutting process due to operating errors, machine tool failures, tool installation problems, and improper workpiece clamping, it may cause tool damage, workpiece scrapping, and even endanger personal safety. Summary of the invention

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

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

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: A cutting device for gear machining, comprising an adjustment unit, including a base, a clamping assembly arranged at one end of the base, and a feeding assembly arranged at the other end of the base;

[0007] The cutting unit includes a C-shaped block arranged on one side of the feed assembly, a driving rod penetrating the inside of the C-shaped block, a driven rod and a driving disk sleeved on the outer wall of the driving rod, a propulsion rod sleeved on the outer wall of the driven rod, and a roller sleeved on the outer wall of the propulsion rod.

[0008] As a preferred solution of the cutting device for gear processing described in the present invention, the base includes a first support platform arranged on one side of its surface, a second support platform arranged on the other side of the base surface, and at least one slide groove arranged on the side wall of the second support platform.

[0009] As a preferred solution of the gear machining cutting device of the present invention, wherein: the clamping assembly comprises a three-jaw caliper arranged on the upper end of the surface of the first support platform, and a motor arranged on the bottom of the first support platform;

[0010] The motor is capable of driving the three-jaw caliper to rotate on the surface of the first support platform.

[0011] As a preferred solution of the cutting device for gear machining of the present invention, wherein: the feeding assembly comprises a push rod arranged at the upper end of the second support platform, and a slide table arranged at the execution end of the push rod;

[0012] The slide table comprises a pair of fixing plates, a push plate arranged on the surface of one of the fixing plates, and a plurality of connecting columns arranged between the fixing plates.

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

[0014] As a preferred embodiment of the cutting device for gear machining of the present invention, the driving rod comprises a first limiting ring arranged at one end thereof, a sleeve arranged at the other end of the driving rod, and a first limiting rail arranged at one side of the sleeve.

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

[0016] The teeth on the first tooth plate are in a triangular shape.

[0017] As a preferred solution of the gear machining cutting device of the present invention, the driving disc comprises a second toothed disc, a spring arranged on one side of the driving disc, and a first limit strip arranged on the inner wall of the second toothed disc;

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

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

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

[0021] The beneficial effects of the present invention are as follows: the present invention can realize the left and right switching of the hob, so that the cutter teeth at each point can be fully utilized and rotated, avoiding the long-term use of the cutter teeth at the same point, reducing the wear and the influence of high pressure and high temperature and extending the service life of the cutter. In addition, when a cutter collision occurs, the transmission can be interrupted in time to buffer the collision, reduce the damage to the cutter and the workpiece, protect the driving source, and effectively avoid the situation where metal fragments splash and injure people under severe collision. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

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

[0024] Figure 2 It is an overall exploded view of the present invention.

[0025] Figure 3 It 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 It is a full cross-sectional view of the cutting unit of the present invention. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] Secondly, the term "one 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 term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0031] Example 1

[0032] Reference Figure 1 to Figure 5 , which is the first embodiment of the present invention, provides a cutting device for gear machining, which includes an adjustment unit 1, including 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;

[0033] The cutting unit 2 includes a C-block 21 arranged on one side of the feed assembly 13, a driving rod 22 penetrating the inside of the C-block 21, a driven rod 23 and a driving disk 24 sleeved on the outer wall of the driving rod 22, a propulsion rod 25 sleeved on the outer wall of the driven rod 23, and a roller 26 sleeved on the outer wall of the propulsion rod 25.

[0034] Furthermore, the base 11 includes a first support platform 111 disposed on one side of the surface of the base 11 , 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 a side wall of the second support platform 112 .

[0035] Furthermore, the clamping assembly 12 includes a three-jaw caliper 121 disposed on the upper end of the 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 feeding assembly 13 includes a push rod 131 disposed at the upper end of the second support platform 112, and a slide 132 disposed at the execution end of the push rod 131;

[0038] The slide platform 132 includes a pair of fixing plates 1321 , a push plate 1322 disposed on a surface of one of the fixing plates 1321 , and a plurality of connection posts 1323 disposed between the fixing plates 1321 .

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

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

[0041] Furthermore, the driven rod 23 includes a second limiting ring 231 disposed at one end thereof, a second limiting rail 232 disposed at one side of the second limiting ring 231, a first toothed plate 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 plate 233 are triangular in shape.

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

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

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

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

[0047] It should be noted that a first support platform 111 and a second support platform 112 are fixed to the surface of the base 11 respectively. The two support platforms have different heights. The first support platform 111 is shorter, and a motor 122 is fixed to 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 drag 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 torque of the motor 122 is sufficient.

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

[0049] The second support platform 112 is relatively high, and it consists of at least one horizontal surface and one vertical surface. 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, and an electric push rod or a pneumatic push rod can also be used. The execution end of the push rod 131 passes through the upper surface of the second support platform 112 and extends downward. Two symmetrically distributed slide grooves 113 are opened on the vertical surface of the second support platform 112, and the slide grooves 113 are through-shaped.

[0050] Preferably, the slide 132 is mainly composed of two fixed plates 1321, which are connected by two vertical rows of connecting columns 1323, and each vertical row has at least one connecting column 1323. Therefore, each vertical row of connecting columns 1323 can pass through the corresponding position of the slide 113, so that the slide 132 can move along the direction of the slide 113, and the two fixed plates 1321 are respectively close to the two sides of the opening of the slide 113. A horizontally placed push plate 1322 is fixed on the fixed plate 1321 facing the push rod 131, and the push plate 1322 can be fixed to the execution end of the push rod 131, while the fixed plate 1321 on the other side can be used to fix the cutting unit 2.

[0051] When the actuator end of the push rod 131 is extended or retracted, the slide table 132 can be driven to move up and down.

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

[0053] A first stop ring 221 is fixed to one end of the driving rod 22, which can cooperate with the annular groove provided on the inner wall of the cylindrical hole 212, so that the driving rod 22 can rotate without falling off. A sleeve 222 is fixed to the other end of the driving rod 22, and the sleeve 222 can be fixed to the shaft end of other driving sources, including motors, internal combustion engines, etc. On one side of the sleeve 222, the outer wall of the driving rod 22 is also provided with at least one first stop rail 223.

[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 to one end of the driving rod 22. The outer diameter of the second limiting ring 231 is consistent with the outer diameter of the first limiting ring 221, so it can also cooperate with the annular groove provided on the inner wall of the cylindrical hole 212, so that the driving rod 22 can rotate circumferentially with the driving rod 22 as the axis. In addition, the sum of the thickness of the first limiting ring 221 and the second limiting ring 231 is consistent with 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 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 consistent. A first tooth plate 233 is also fixed to the other end of the second limiting ring 231. The circumferential array on the first tooth plate 233 has triangular teeth, and the teeth face the axial extension direction of the driven rod 23. In addition, a cam groove 234 connected end to end is provided on the outer wall of the driven rod 23.

[0056] Preferably, the drive disk 24 is composed of a second toothed disk 241 and a spring 242. The second toothed disk 241 is consistent in shape and size with the first toothed disk 233, but the teeth of the two are arranged opposite to each other. The drive disk 24 is sleeved on the side of the drive rod 22 with the shaft sleeve 222, and the spring 242 is sleeved between the shaft sleeve 222 and the drive disk 24, so that the drive disk 24 can be pushed toward the first toothed disk 233 by the action of the spring 242, and at least one first limit bar 243 is fixed on the inner wall of the drive disk 24, which can cooperate with the first limit rail 223, so that the drive rod 22 can drive the drive disk 24 to rotate when rotating, and the drive disk 24 drives the driven rod 23 to rotate under the action of the spring 242.

[0057] In addition, since the driving disk 24 needs to disconnect the transmission with the first toothed disk 233 and retreat against the force of the spring 242 when the driven rod 23 is suddenly stopped, the length of the first limiting rail 223 is greater than the overall width of the driving disk 24 .

[0058] Preferably, the push rod 25 is sleeved on the outer wall of the driven rod 23, and a third limiting ring 251 is fixed at one end of the push rod 25, and a square rod 252 is fixed at 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 leaves the square hole 211, so the push rod 25 cannot rotate. On the inner wall of the push rod 25, a convex point 253 of the same size as the width of the cam groove 234 is fixed. The convex point 253 is always inserted into and cooperates with the cam groove 234. When the driven rod 23 rotates, the convex point 253 can move in the cam groove 234, so that the push rod 25 can move back and forth axially on the driven rod 23.

[0059] Preferably, the hob 26 is used for processing the gear wheel blank by the mold forming method, and is sleeved on the outer wall of the round rod part of the push rod 25. A limiting groove 261 is provided 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, and 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 rotational cutting. Since the push rod 25 can drive the hob 26 to move axially, the second limiting rail 232 also needs to leave a longer distance to ensure the normal movement of the push rod 25.

[0060] During use, when processing the gear, the gear blank is clamped and fixed on the three-jaw caliper 121, and the motor 122 drags the three-jaw caliper 121 to rotate, so that the gear blank also rotates. At this time, the cutting unit 2 is located at the upper end of the gear blank, and the driving rod 22 is dragged by other driving sources to rotate. Due to the action of the spring 242, the driving disk 24 is meshed with the first tooth disk 233, so the driven rod 23 also rotates accordingly, and then the rotation of the cam groove 234 drives the reciprocating movement of the convex point 253. At this time, the propulsion rod 25 also reciprocates accordingly and does not rotate, while the hob 26 is driven to rotate by the driven rod 23, so the hob 26 can rotate circumferentially and can reciprocate, so that the cutting point changes continuously.

[0061] Then the cutting unit 2 is driven downward by the push rod 131 to slowly cut the edge of the gear wheel 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 driving disk 24 will retreat under resistance, thereby interrupting the power, reducing the impact caused by the collision, and avoiding overload of the driving source.

[0062] In summary, this design can realize the left and right switching of the hob, so that the teeth at each point can be fully utilized and rotated, avoiding the long-term use of the teeth at the same point, reducing the wear and the influence of high pressure and high temperature and extending the service life of the tool. In addition, when a tool collision occurs, the transmission can be interrupted in time to buffer the impact, reduce the damage to the tool and the workpiece, protect the drive source, and effectively avoid the situation where metal fragments splash and injure people under severe impact.

[0063] It is important to note that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A cutting device for gear machining, characterized in that: include, An adjustment 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 on one side of the feeding assembly (13), a driving rod (22) penetrating the interior of the C-shaped block (21), a driven rod (23) and a driving disk (24) sleeved on the outer wall of the driving rod (22), a propulsion rod (25) sleeved on the outer wall of the driven rod (23), and a roller (26) sleeved on the outer wall of the propulsion rod (25).

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

3. The gear cutting device according to claim 2, characterized in that: The clamping assembly (12) comprises a three-jaw caliper (121) arranged on the upper end of the surface of the first support platform (111), and a motor (122) arranged on the bottom of the first support platform (111); The motor (122) is capable of driving the three-jaw caliper (121) to rotate on the surface of the first support platform (111).

4. The gear cutting device according to claim 3, characterized in that: The feeding assembly (13) comprises a push rod (131) arranged at the upper end of the second support platform (112), and a slide platform (132) arranged at the execution end of the push rod (131); The slide platform (132) includes 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 gear machining cutting device according to any one of claims 1 to 4, characterized in that: The C-shaped block (21) comprises a square hole (211) arranged at one end thereof, and a columnar hole (212) arranged at the other end of the C-shaped block (21).

6. The gear cutting device according to claim 5, characterized in that: 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).

7. The gear cutting device according to claim 6, characterized in that: 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.

8. The gear cutting device according to claim 7, characterized in that: The driving disk (24) comprises a second toothed disk (241), a spring (242) arranged on one side of the driving disk (24), and a first limiting strip (243) arranged on the inner wall of the second toothed disk (241); The second toothed disc (241) has the same tooth shape as the first toothed disc (233).

9. The gear cutting device according to claim 8, characterized in that: The propulsion rod (25) comprises a third limiting ring (251) arranged at one end thereof, a square rod (252) arranged at the other end of the propulsion rod (25), and a convex point (253) arranged on the inner wall of the propulsion rod (25).

10. The gear cutting device according to claim 9, characterized in that: The roller cutter (26) comprises a limiting groove (261) arranged at one end of its inner wall, and a second limiting strip (262) arranged at an opening at the end of the roller cutter (26).

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