Gear shaping device

Abstract

The present patent application belongs to the technical field of gear processing, and specifically relates to a gear shaping processing device, including a positioning assembly, a rotating mechanism, a clamping mechanism and a gear shaping cutter, wherein the positioning assembly is used to place and position the gear blank, the clamping mechanism is used to drive the positioning assembly and the gear blank to move up and down, so that the upper end surface of the gear blank rests on the rotating mechanism, and the rotating mechanism is used to drive the gear blank to rotate; the positioning assembly includes a support plate, a plurality of inner support rods and a plurality of outer support rods, the plurality of inner support rods are arranged around a rotation center line, each outer support rod is collinear with the center line of the inner support rod, each inner support rod and outer support rod can adjust the length, when the gear blank is placed on the support plate, each inner support rod is in contact with the inner wall of the gear blank, and each outer inner support rod is in contact with the outer wall of the gear blank; by setting the positioning assembly and the clamping mechanism for clamping, the gear shaping cutter can be used for processing inner and outer rings, and there is no need to replace the fixture when processing different types of gears.

Description

Technical Field

[0001] The invention relates to the technical field of gear processing, and in particular to a gear shaping processing device. Background Art

[0002] Gear shaping is a method of machining the tooth surfaces of internal and external gears or racks using a gear shaping cutter on a gear shaping machine.

[0003] For gears with larger diameters, first install the gear blank on a rotatable fixture, and the gear cutter moves back and forth along the axis of the gear blank. The gear cutter cuts the gear blank when it moves downward, and avoids the gear blank when it moves upward to prevent the gear cutter from scratching the cut tooth surface. The fixture drives the gear blank to rotate intermittently, so that the gear cutter cuts the gear blank section by section, thereby completing the processing of the external or internal teeth.

[0004] However, when processing external teeth, the fixture needs to be pressed against the inner circumference of the gear blank. When processing internal teeth, the fixture needs to be pressed against the outer circumference of the gear blank. Different fixtures are required for clamping. Therefore, when processing different types of gears, the fixture needs to be disassembled and assembled, affecting production efficiency. Summary of the invention

[0005] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide a gear shaping processing device, which can be clamped by setting a positioning component and a clamping mechanism so that the gear shaping cutter can process the inner ring and the outer ring and process different types of gears without changing the fixture.

[0006] The technical solution adopted by the present invention is as follows:

[0007] A gear shaping device comprises a positioning assembly, a rotating mechanism and a pressing mechanism, wherein the positioning assembly is used to place and position a tooth blank, the pressing mechanism is used to drive the positioning assembly and the tooth blank to move up and down so that the upper end surface of the tooth blank abuts against the rotating mechanism, the rotating mechanism is used to drive the tooth blank to rotate, and the rotation center line of the rotating mechanism is colinear with the center line of the tooth blank;

[0008] The positioning assembly includes a support plate, a plurality of inner support rods and a plurality of outer support rods, the support plate is fixedly mounted on the movable end of the jacking mechanism, each of the inner support rods and the outer support rods are mounted on the support plate, the plurality of inner support rods are arranged around a rotation center line, each of the outer support rods is colinear with the center line of the inner support rods, each of the inner support rods and the outer support rods can adjust the length, and when the tooth blank is placed on the support plate, each of the inner support rods is in contact with the inner wall of the tooth blank, and each of the outer support rods is in contact with the outer wall of the tooth blank;

[0009] It also includes a gear shaping cutter. A through slot is provided on the support plate. The through slot is located between two adjacent inner support rods. The gear shaping cutter can pass through the through slot when cutting the outer teeth and the inner teeth of the gear blank.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] Before processing, the lengths of the inner and outer support rods can be adjusted according to the inner and outer diameters of the gear blank, and the gear blank can be placed on the support plate and located between the inner and outer support rods, which can be suitable for positioning gear blanks of different sizes; the lifting mechanism drives the support plate and the gear blank to rise, so that the upper end surface of the gear blank is pressed against the rotating mechanism. At this time, the gear shaping cutter cuts the portion of the gear blank located above the through slot. After completing the cutting of the arc segment, the rotating mechanism can drive the gear blank to rotate, and since the gear blank is limited by the inner and outer support rods, the gear blank is not easy to be eccentric during rotation, so that the unprocessed portion of the gear blank is located above the through slot, and it is processed section by section to complete the processing of the entire gear blank. By setting a positioning component and clamping in cooperation with the clamping mechanism, the gear shaping cutter can process the inner and outer rings, and there is no need to replace the fixture when processing different types of gears.

[0012] As a preferred embodiment of the present invention, each of the inner support rods includes a threaded barrel, a threaded rod and an elastic member, a boss is provided on the support plate, the threaded barrel is fixedly connected to the boss, one end of the threaded rod is threadedly connected to the threaded barrel, and the elastic member is fixedly connected to the other end of the threaded rod.

[0013] Beneficial effects: By setting the threaded tube and the threaded rod, the overall length of the inner support rod can be adjusted to be suitable for gear blanks of different sizes; by setting the elastic part, the gear blank can be installed between the inner support rod and the outer support rod, and the gear blank is easier to insert; multiple elastic parts produce a certain tightening force on the inner wall of the gear blank, and there is no gap between the gear blank and the inner support rod and the outer support rod, thereby preventing the gear blank from loosening when rising and falling; when part of the inner teeth are processed, the inner wall is no longer smooth, and by setting the elastic part, the elastic part can always be pressed against the inner wall; when part of the outer teeth are processed, the outer wall is no longer smooth, and since the inner diameter remains unchanged, the inner support rod can still be pressed against the inner wall to ensure accurate positioning.

[0014] As a preferred embodiment of the present invention, the elastic member includes a compression spring and a mounting block, the end of the threaded rod away from the threaded barrel is transversely provided with a sliding groove, the compression spring is transversely mounted in the sliding groove, and the mounting block is fixedly connected to the compression spring and slidably mounted in the sliding groove;

[0015] Each of the mounting blocks is provided with a first freely rotatable ball. When the tooth blank is placed on the support plate, the inner wall of the tooth blank contacts the first ball.

[0016] Beneficial effect: by setting the first ball, when the tooth blank is installed on the support plate, when the tooth blank deviates within a certain range, the tooth blank is pressed downward, the arc surface of the first ball is subjected to force, the compression spring is compressed, and the tooth blank can be pressed between the inner support rod and the outer support rod. At this time, the compression spring rebounds, and the first balls in multiple directions push outward to automatically correct the tooth blank; therefore, through the above mechanism, when manually installing the tooth blank, the tooth blank can be installed by roughly aligning it with the inner support rod, and the installation of the tooth blank is more convenient.

[0017] As a preferred embodiment of the present invention, each of the outer support rods is provided with a freely rotatable second ball at one end close to the boss, and when the tooth blank is placed on the support plate, the outer wall of the tooth blank contacts the second ball.

[0018] Beneficial effect: By providing the first ball and the second ball, when the rotating mechanism drives the tooth blank to rotate, the tooth blank drives the first ball and the second ball to rotate, so that the friction force on the tooth blank is small, thereby preventing the tooth blank from being unable to rotate to the specified position.

[0019] As a preferred embodiment of the present invention, the rotating mechanism includes a driving motor installed on a fixed plate, the output shaft of the driving motor is fixedly connected to a first gear, a transmission shaft is vertically rotatably installed on the fixed plate, a second gear is fixedly connected to the transmission shaft, the second gear is meshed with the first gear, and a pressure plate is fixedly connected to the lower end of the transmission shaft, and after the tightening mechanism drives the tooth blank to rise, the tooth blank is tightened against the pressure plate, and the friction between the pressure plate and the tooth blank is greater than the friction between the support plate and the tooth blank.

[0020] Beneficial effect: The driving motor drives the pressure plate to rotate through the first gear, the second gear and the transmission shaft. The pressure plate and the support plate are arranged to clamp the gear blank, thereby driving the gear blank to rotate. After rotating to the specified position, the gear shaping cutter performs processing. After the processing is completed, the gear shaping cutter avoids the pressure plate, and the tightening mechanism drives the gear blank to descend, and the gear blank separates from the pressure plate. The driving motor drives the pressure plate to rotate to the starting position, and the tightening mechanism drives the gear blank to tighten on the pressure plate again, thereby realizing segmented processing.

[0021] As a preferred embodiment of the present invention, the first gear is a sector gear, and every time the first gear rotates 360°, the arc of rotation of the gear blank is equal to the arc processed by the gear shaping cutter;

[0022] A torsion spring is sleeved on the transmission shaft, one end of the torsion spring is fixedly connected to the fixing plate, and the other end of the torsion spring is fixedly connected to the transmission shaft.

[0023] Beneficial effect: when the position of the tooth blank needs to be adjusted, the driving motor drives the first gear to rotate. Since the first gear is a fan-shaped gear, when the first gear and the second gear are in the meshing section, the second gear and the pressure plate are rotated to compress the torsion spring, thereby driving the tooth blank to rotate a certain distance. At this time, the tightening mechanism drives the tooth blank to descend, and the first gear continues to rotate. Since the first gear and the second gear are no longer meshing, the torsion spring is reset, so that the pressure plate is reset. When the first gear rotates 360°, the tightening mechanism drives the tooth blank to be tightened against the pressure plate again for further processing. Through the above structure, the pressure plate does not need to rotate 360° and will not interfere with the gear shaping cutter. Therefore, the gear shaping cutter does not need to be designed with an avoidance stroke. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of an embodiment of a gear shaping processing device of the present invention;

[0025] Figure 2 2 is a schematic diagram of the structure of the positioning assembly in the gear shaping device embodiment of the present invention;

[0026] Figure 3 2 is a schematic structural diagram of an inner support rod in an embodiment of a gear shaping device of the present invention;

[0027] Figure 4 It is a structural schematic diagram of the rotating mechanism in the embodiment of the gear shaping processing device of the present invention.

[0028] The reference numerals include: positioning assembly 1, support plate 11, through groove 111, boss 112, inner support rod 12, threaded cylinder 121, threaded rod 122, elastic member 123, compression spring 1231, mounting block 1232, first ball 1233, outer support rod 13, second ball 131, rotating mechanism 2, first gear 21, second gear 22, transmission shaft 23, fixing plate 24, torsion spring 25, pressure plate 26, tightening mechanism 3, and gear inserting cutter 4. DETAILED DESCRIPTION

[0029] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially used for illustration purposes rather than for limiting the present invention.

[0030] In the description of the present application, the terms "first", "second", etc. are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the structure referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0031] See also Figure 1As shown, this embodiment discloses a gear shaping processing device, including a positioning assembly 1, a rotating mechanism 2, a clamping mechanism 3 and a gear shaping cutter 4, wherein the positioning assembly 1 is used to place and position the gear blank, and the clamping mechanism 3 is used to drive the positioning assembly 1 and the gear blank to move up and down, so that the upper end surface of the gear blank is against the rotating mechanism 2, and the rotating mechanism 2 is used to drive the gear blank to rotate, and the rotation center line of the rotating mechanism 2 is colinear with the center line of the gear blank.

[0032] In this embodiment, the pressing mechanism 3 is a cylinder. In other embodiments, the pressing mechanism 3 may be a hydraulic cylinder or an electric push rod.

[0033] Among them, see Figure 2 As shown, the positioning assembly 1 includes a support plate 11, a plurality of inner support rods 12 and a plurality of outer support rods 13, the support plate 11 is fixedly mounted on the movable end of the tightening mechanism 3, a through slot 111 is arranged on the support plate 11, the through slot 111 is located between two adjacent inner support rods 12, and the gear cutter 4 can pass through the through slot 111 when cutting the outer teeth and the inner teeth of the gear blank; each of the inner support rods 12 and the outer support rods 13 are mounted on the support plate 11, a plurality of the inner support rods 12 are arranged around the rotation center line, each of the outer support rods 13 is colinear with the center line of the inner support rods 12, and each of the inner support rods 12 and the outer support rods 13 can adjust the length, and when the gear blank is placed on the support plate 11, each inner support rod 12 contacts the inner wall of the gear blank, and each outer support rod 13 contacts the outer wall of the gear blank; the gear blank is mounted between the inner support rods 12 and the outer support rods 13, so that when the rotating mechanism 2 drives the gear blank to rotate, the gear blank is not easily offset.

[0034] Among them, see Figure 3 As shown, each of the inner support rods 12 includes a threaded tube 121, a threaded rod 122 and an elastic member 123. A boss 112 is provided on the support plate 11. The threaded tube 121 is fixedly connected to the boss 112. One end of the threaded rod 122 is screwed to the threaded tube 121, and the elastic member 123 is fixedly connected to the other end of the threaded rod 122. By providing the elastic member 123, when the tooth blank is installed between the inner support rod 12 and the outer support rod 13, the tooth blank is easier to insert. The multiple elastic members 123 generate a certain tightening force on the inner wall of the tooth blank, and there is no gap between the tooth blank and the inner support rod 12 and the outer support rod 13, so as to prevent the tooth blank from loosening when rising and falling.

[0035] Among them, see Figure 3As shown, the elastic member 123 includes a compression spring 1231 and a mounting block 1232. A sliding groove is transversely opened at one end of the threaded rod 122 away from the threaded tube 121. The compression spring 1231 is transversely mounted in the sliding groove. The mounting block 1232 is fixedly connected to the compression spring 1231 and is slidably mounted in the sliding groove. Each of the mounting blocks 1232 is provided with a freely rotatable first ball 1233. When the tooth blank is placed on the support plate 11, the inner wall of the tooth blank contacts the first ball 1233. Each of the outer support rods 13 is provided with a freely rotatable second ball 131 at one end close to the boss, and when the tooth blank is placed on the support plate 11, the outer wall of the tooth blank contacts the second ball 131; when the tooth blank is installed on the support plate 11, when the tooth blank deviates within a certain range, the tooth blank is pressed downward, and the arcuate surface of the first ball 1233 is subjected to force, and the compression spring 1231 is compressed, so that the tooth blank can be pressed between the inner support rod 12 and the outer support rod 13. At this time, the compression spring 1231 rebounds, and the first balls 1233 in multiple directions push outward to automatically correct the tooth blank; therefore, through the above mechanism, the tooth blank is roughly aligned with the inner support rod 12 and can be installed, and the installation of the tooth blank is more convenient.

[0036] Among them, see Figure 2 As shown, each of the outer support rods 13 is provided with a freely rotatable second ball 131 at one end close to the boss, and when the tooth blank is placed on the support plate 11, the outer wall of the tooth blank contacts the second ball 131; when the rotating mechanism 2 drives the tooth blank to rotate, the tooth blank drives the first ball 1233 and the second ball 131 to rotate, so that the friction force on the tooth blank is small, thereby preventing the tooth blank from being unable to rotate to the specified position.

[0037] In this embodiment, the outer support rod 13 and the inner support rod 12 have the same structure, and the length is adjusted by using threads.

[0038] Among them, see Figure 4 As shown, the rotating mechanism 2 includes a driving motor installed on a fixed plate 24, the output shaft of the driving motor is fixedly connected to a first gear 21, a transmission shaft 23 is vertically rotatably installed on the fixed plate 24, a second gear 22 is fixedly connected to the transmission shaft 23, the second gear 22 is meshed with the first gear 21, and a pressing plate 26 is fixedly connected to the lower end of the transmission shaft 23. After the tightening mechanism 3 drives the tooth blank to rise, the tooth blank is tightened on the pressing plate 26, and the friction between the pressing plate 26 and the tooth blank is greater than the friction between the support plate 11 and the tooth blank;

[0039] The first gear 21 is a sector gear. Every time the first gear 21 rotates 360°, the arc of rotation of the gear blank is equal to the arc processed by the gear shaping cutter 4. A torsion spring 25 is sleeved on the transmission shaft 23. One end of the torsion spring 25 is fixedly connected to the fixed plate 24, and the other end of the torsion spring 25 is fixedly connected to the transmission shaft 23. The driving motor drives the first gear 21 to rotate. Since the first gear 21 is a sector gear, when the first gear 21 and the second gear 22 are in the meshing section, the second gear 22 and the pressure plate 26 are rotated to compress the torsion spring 25, thereby driving the gear blank to rotate a certain distance, and the first gear 21 continues to rotate. Since the first gear 21 and the second gear 22 are no longer meshed, the torsion spring 25 is reset, so that the pressure plate 26 is reset. The pressure plate 26 does not need to rotate 360° and will not interfere with the gear shaping cutter 4.

[0040] The usage and principle of this embodiment are as follows:

[0041] According to the inner and outer diameters of the tooth blank, the lengths of the inner support rod 12 and the outer support rod 13 are adjusted, and the tooth blank is placed on the support plate 11 and located between the inner support rod 12 and the outer support rod 13. When the tooth blank deviates within a certain range, the tooth blank is pressed downward, and the arc surface of the first ball 1233 is stressed, and the compression spring 1231 is compressed, so that the tooth blank can be pressed between the inner support rod 12 and the outer support rod 13. At this time, the compression spring 1231 rebounds, and the first balls 1233 in multiple directions push outward, so that the tooth blank is automatically corrected;

[0042] After the tooth blank is placed, the clamping mechanism 3 drives the support plate 11 and the tooth blank to move upward until the tooth blank is clamped on the pressure plate 26. The tooth blank is clamped by the clamping force of the compression spring 1231 from inside to outside and the clamping force of the clamping mechanism 3 from bottom to top. A part of the tooth blank is located above the through groove 111, and the gear shaping cutter 4 processes the part. After the processing is completed, the rotating mechanism 2 adjusts the position of the tooth blank so that the processed section is always located above the through groove 111.

[0043] When adjusting the position of the tooth blank, the driving motor drives the first gear 21 to rotate. Since the first gear 21 is a fan-shaped gear, when the first gear 21 and the second gear 22 are in the meshing section, the second gear 22 and the pressure plate 26 are rotated, compressing the torsion spring 25, thereby driving the tooth blank to rotate a certain distance. At this time, the tightening mechanism 3 drives the tooth blank to descend, and the first gear 21 continues to rotate. Since the first gear 21 and the second gear 22 are no longer meshing, the torsion spring 25 is reset, so that the pressure plate 26 is reset. When the first gear 21 rotates 360°, the tightening mechanism 3 drives the tooth blank to be tightened on the pressure plate 26 again, and then the processing is carried out. Through the above structure, the pressure plate 26 does not need to rotate 360°, and will not interfere with the gear shaping cutter 4.

[0044] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A gear shaping device, characterized in that: It includes a positioning assembly, a rotating mechanism and a tightening mechanism, wherein the positioning assembly is used to place and position the tooth blank, the tightening mechanism is used to drive the positioning assembly and the tooth blank to move up and down, so that the upper end surface of the tooth blank abuts against the rotating mechanism, the rotating mechanism is used to drive the tooth blank to rotate, and the rotation center line of the rotating mechanism is colinear with the center line of the tooth blank; The positioning assembly includes a support plate, a plurality of inner support rods and a plurality of outer support rods, the support plate is fixedly mounted on the movable end of the jacking mechanism, each of the inner support rods and the outer support rods are mounted on the support plate, the plurality of inner support rods are arranged around a rotation center line, each of the outer support rods is colinear with the center line of the inner support rods, each of the inner support rods and the outer support rods can adjust the length, and when the tooth blank is placed on the support plate, each of the inner support rods is in contact with the inner wall of the tooth blank, and each of the outer support rods is in contact with the outer wall of the tooth blank; It also includes a gear shaping cutter, wherein the support plate is provided with a through slot, the through slot is located between two adjacent inner support rods, and the gear shaping cutter can pass through the through slot when cutting the outer teeth and the inner teeth of the gear blank; The rotating mechanism includes a driving motor installed on a fixed plate, the output shaft of the driving motor is fixedly connected to a first gear, a transmission shaft is vertically rotatably installed on the fixed plate, a second gear is fixedly connected to the transmission shaft, the second gear is meshed with the first gear, and a pressure plate is fixedly connected to the lower end of the transmission shaft. After the tightening mechanism drives the tooth blank to rise, the tooth blank is tightened against the pressure plate, and the friction between the pressure plate and the tooth blank is greater than the friction between the support plate and the tooth blank.

2. The gear shaping device according to claim 1, characterized in that: Each of the inner support rods includes a threaded barrel, a threaded rod and an elastic member. A boss is provided on the support plate. The threaded barrel is fixedly connected to the boss. One end of the threaded rod is screwed to the threaded barrel, and the elastic member is fixedly connected to the other end of the threaded rod.

3. The gear shaping device according to claim 2, characterized in that: The elastic member comprises a compression spring and a mounting block, a sliding groove is transversely opened at one end of the threaded rod away from the threaded barrel, the compression spring is transversely mounted in the sliding groove, and the mounting block is fixedly connected to the compression spring and slidably mounted in the sliding groove; Each of the mounting blocks is provided with a first freely rotatable ball. When the tooth blank is placed on the support plate, the inner wall of the tooth blank contacts the first ball.

4. The gear shaping device according to claim 3, characterized in that: A second freely rotatable ball is arranged at one end of each outer support rod close to the boss, and when the tooth blank is placed on the support plate, the outer wall of the tooth blank contacts the second ball.

5. The gear shaping device according to claim 1, characterized in that: The first gear is a sector gear, and when the first gear rotates 360°, the arc of rotation of the gear blank is equal to the arc processed by the gear shaping cutter; A torsion spring is sleeved on the transmission shaft, one end of the torsion spring is fixedly connected to the fixing plate, and the other end of the torsion spring is fixedly connected to the transmission shaft.

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