Positioning clamp for gear machining

Abstract

The utility model belongs to the technical field of gear machining, and particularly relates to a positioning clamp for gear machining, which comprises a supporting seat and a positioning supporting mechanism arranged on the supporting seat, and a pressing clamping mechanism corresponding to the positioning supporting mechanism is arranged above the supporting seat. The positioning and supporting mechanism comprises a supporting disc and a worm gear, two stable shaft plates are fixedly arranged on the bottom face of the supporting base and are both in rotating fit with a worm, and the worm is connected with the worm gear in an engaged mode. An electric push rod on the pressing and clamping mechanism extends out to drive a pressing ring to descend to press a gear workpiece on a supporting disc, then a drawing rotating plate on the positioning and supporting mechanism is used for drawing and rotating, and meanwhile the supporting disc on a rotating supporting shaft and the gear workpiece are driven to rotate to cope with milling of a tooth groove. In this way, the clamp can conveniently conduct running fit milling machining on the gear workpiece, the horizontal plane of the gear workpiece can be pressed, and the stability and machining precision of the gear workpiece in the machining process are improved.

Description

Technical Field

[0001] This utility model belongs to the field of gear processing technology, and specifically relates to a positioning fixture for gear processing. Background Technology

[0002] A gear is a mechanical component with teeth on its rim that can continuously mesh to transmit motion and power. Gears have been used in transmission for a long time. In the late 19th century, the principle of generating gear cutting and the subsequent emergence of specialized machine tools and cutting tools based on this principle led to increased emphasis on the smoothness of gear operation as production developed. Gear machining requires specialized and complex tooling systems, necessitating the selection and design of different tools according to different gear products and machining methods. Before milling, the gear workpiece needs to be clamped and positioned to allow the cutting tool to perform the milling process.

[0003] Problems with existing technology:

[0004] Existing fixtures for clamping gear workpieces mostly use the outer peripheral side for clamping. When the gear workpiece rotates, it is necessary to release the clamp, rotate, and then clamp again. This is not only cumbersome, but also does not provide a stable clamping of the entire horizontal plane of the gear workpiece, resulting in shaking during the milling process and affecting the milling accuracy. Utility Model Content

[0005] The purpose of this invention is to provide a positioning fixture for gear processing that can solve the above-mentioned technical problems.

[0006] The specific technical solution adopted by this utility model is as follows:

[0007] The present invention provides a positioning fixture for gear processing, including a support base and a positioning support mechanism disposed on the support base, wherein a pressing and clamping mechanism corresponding to the positioning support mechanism is disposed above the support base;

[0008] The positioning support mechanism includes a support plate and a worm gear. A rotating support shaft is rotatably mounted on the support base. The support plate is located above the support base and fixed to the upper end of the rotating support shaft. The worm gear is located below the support base and fixed to the lower end of the rotating support shaft. Two stabilizing shaft plates are fixed to the bottom surface of the support base. Both stabilizing shaft plates are rotatably engaged with the worm. The worm is meshed with the worm gear.

[0009] The pressing and clamping mechanism includes a lifting and pulling plate and upper and lower corresponding pressing rings on the support plate. A fixed plate is fixed on the support base. An electric push rod is provided on the fixed plate. Two slide rail columns are sleeved on the fixed plate. The lifting and pulling plate is fixedly connected to the lower side of the two slide rail columns. The protruding end of the electric push rod is sleeved through the fixed plate and fixedly connected to the lifting and pulling plate.

[0010] Using the above-mentioned positioning fixture for gear processing, the gear workpiece is placed on the support plate and sleeved on the inner sleeve pin hole shaft, and then connected by a key. Then, the electric push rod on the pressing and clamping mechanism is controlled to extend. The electric push rod drives the pressing ring and the base plate to descend synchronously, so that the base plate descends to the inner sleeve pin hole shaft, and at the same time the pressing ring descends to press against the gear workpiece for clamping, and then milling is performed.

[0011] When a rotation angle is required, the pull-out rotating plate on the positioning support mechanism can be pulled, causing the pull-out rotating plate to move synchronously with the push-pull plate and the outer sleeve plate, compressing the rebound spring. At the same time, it drives the transmission push-pull shaft to rotate the flip push-pull plate against the central fixed shaft. This allows the flip push-pull plate to rotate, causing the brake tooth groove plate to move away from the support plate, thereby releasing the brake tooth groove plate from the outer circumference of the support plate. Then, rotating the pull-out rotating plate drives the worm gear to rotate, which in turn drives the worm wheel and the rotating support shaft to rotate. This causes the rotating support shaft to drive the gear workpiece on the support plate to rotate synchronously, which facilitates the machining of another tooth groove during gear milling. At the same time, the pull-out rotating plate is released, causing the rebound spring to push the brake tooth groove plate to lock onto the corresponding brake tooth, thus braking the support plate. This allows the milling process to continue.

[0012] Preferably, four side support plates are fixedly provided on the pressing ring, and a rotating plate is rotatably provided at the lower end of the electric push rod. The four side support plates are respectively fixed on the four sides of the rotating plate. A base is provided at the center of the pressing ring. A telescopic rod is fixedly provided on the bottom surface of the extended end of the electric push rod opposite to the base. A buffer spring is sleeved on the telescopic rod. The upper side of the buffer spring is fixedly connected to the bottom surface of the extended end of the electric push rod, and the lower side of the buffer spring is fixedly connected to the base.

[0013] Preferably, the worm gear is provided with a pull-out rotating mechanism, and the pull-out rotating mechanism includes a pull-out rotating plate slidably sleeved in the worm gear. The bottom surface of the support base is fixed with a secondary stabilizing plate, and the secondary stabilizing plate is slidably engaged with the pull-out rotating plate through a rotating turntable.

[0014] Preferably, a push-pull plate is fixedly provided on one side of the pull-out rotating plate, and a rebound spring is sleeved on the pull-out rotating plate. The rebound spring is fixed between the push-pull plate and one of the stabilizing shaft plates. An outer sleeve is rotatably provided on the push-pull plate, and a transmission push-pull shaft is fixedly provided on the side of the outer sleeve. The transmission push-pull shaft is connected to the braking mechanism.

[0015] Preferably, the braking mechanism includes a brake toothed plate, a flip-pull plate, and multiple brake teeth disposed on the outer periphery of the support plate. The brake toothed plate is meshed with the multiple brake teeth through the formed toothed grooves. A sliding sleeve frame is fixedly provided on the upper surface of the support base, and the brake toothed plate is slidably sleeved in the sliding sleeve frame.

[0016] Preferably, the support base is fitted with a flip-pull plate through a shaped flip hole, and a central fixed shaft is fixed inside the flip hole. The flip-pull plate is movably connected to the central fixed shaft through a shaped central movable hole. The upper side of the flip-pull plate is hinged to the bottom surface of the brake tooth groove plate, and the lower side of the flip-pull plate is movably connected to the transmission push-pull shaft through a shaped flip-pull hole.

[0017] Preferably, the support plate is fixed with an inner sleeve pin hole shaft that corresponds to the upper and lower parts of the chassis.

[0018] The beneficial effects are:

[0019] This invention utilizes an electric push rod extending from a pressing and clamping mechanism to lower a pressing ring and press the gear workpiece on the support plate. Then, a pull-out rotating plate on a positioning support mechanism adjusts the brake tooth groove plate on the braking mechanism away from the brake teeth, thereby disengaging the brake teeth. This allows the worm and worm wheel to rotate synchronously by rotating the pull-out rotating plate, simultaneously rotating the support plate on the rotating support shaft and the gear workpiece to perform milling of the tooth groove. Thus, this fixture not only facilitates rotational milling of the gear workpiece but also presses the gear workpiece horizontally, improving the stability and machining accuracy of the gear workpiece. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the positioning support mechanism in this utility model;

[0022] Figure 3 This is a schematic diagram of the other side of the positioning support mechanism in this utility model;

[0023] Figure 4 This is a schematic diagram of the pressing and clamping mechanism in this utility model.

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 1. Support base; 2. Positioning support mechanism; 201. Rotating support shaft; 202. Worm gear; 203. Worm; 204. Stabilizing shaft plate; 205. Pull-out rotating plate; 206. Secondary stabilizing plate; 207. Support plate; 208. Brake teeth; 209. Inner sleeve pin hole shaft; 210. Brake tooth groove plate; 211. Sliding sleeve frame; 212. Central fixed shaft; 213. Flip-up push-pull plate; 214. Transmission push-pull shaft; 215. Outer plate; 216. Push-pull plate; 217. Rebound spring; 3. Fixed plate; 4. Pressing and clamping mechanism; 401. Electric push rod; 402. Slide rail column; 403. Lifting push-pull plate; 404. Rotating plate; 405. Side support plate; 406. Pressing ring; 407. Chassis; 408. Telescopic rod; 409. Buffer spring. Detailed Implementation

[0026] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0027] like Figure 1-4 As shown, a positioning fixture for gear processing includes a support base 1 and a positioning support mechanism 2 disposed on the support base 1. A pressing and clamping mechanism 4 corresponding to the positioning support mechanism 2 is disposed above the support base 1.

[0028] The positioning support mechanism 2 includes a support disk 207 and a worm gear 202. A rotating support shaft 201 is rotatably mounted on the support base 1. The support disk 207 is located above the support base 1 and fixed to the upper end of the rotating support shaft 201. The worm gear 202 is located below the support base 1 and fixed to the lower end of the rotating support shaft 201. Two stabilizing shaft plates 204 are fixed to the bottom surface of the support base 1. Both stabilizing shaft plates 204 are rotatably engaged with the worm 203. The worm 203 is meshed with the worm gear 202.

[0029] The pressing and clamping mechanism 4 includes a lifting and pulling plate 403 and a support plate 207 with corresponding pressing rings 406 on the upper and lower sides. A fixed plate 3 is fixed on the support base 1. An electric push rod 401 is provided on the fixed plate 3. Two slide rail columns 402 are sleeved on the fixed plate 3. The lifting and pulling plate 403 is fixedly connected to the lower side of the two slide rail columns 402. The extended end of the electric push rod 401 is sleeved through the fixed plate 3 and fixedly connected to the lifting and pulling plate 403.

[0030] As an optional implementation, four side support plates 405 are fixedly mounted on the pressing ring 406. A rotating plate 404 is rotatably mounted on the lower end of the electric push rod 401. The four side support plates 405 are respectively fixed on the four sides of the rotating plate 404. A base 407 is provided at the center of the pressing ring 406. A telescopic rod 408 is fixedly mounted on the bottom surface of the extended end of the electric push rod 401 opposite to the base 407. A buffer spring 409 is sleeved on the telescopic rod 408. The upper side of the buffer spring 409 is fixedly connected to the bottom surface of the extended end of the electric push rod 401, and the lower side of the buffer spring 409 is fixedly connected to the base 407. With this arrangement, the buffer spring 409 can elastically push the telescopic rod 408, so that the base 407 presses against the inner sleeve pin hole shaft 209 to cope with the continuous descent of the pressing ring 406.

[0031] See attached document Figure 2 and attached Figure 3 The worm gear 203 is equipped with a pull-out rotating mechanism, which includes a pull-out rotating plate 205 slidably sleeved inside the worm gear 203. A secondary stabilizing plate 206 is fixedly provided on the bottom surface of the support base 1. The secondary stabilizing plate 206 slides in cooperation with the pull-out rotating plate 205 through a rotating turntable. With this arrangement, the secondary stabilizing plate 206 can be used to slide and rotate to support the pull-out rotating plate 205, thereby avoiding the suspension deformation of the pull-out rotating plate 205 and affecting its service life.

[0032] Furthermore, a push-pull plate 216 is fixedly provided on one side of the pull-out rotating plate 205, and a rebound spring 217 is sleeved on the pull-out rotating plate 205. The rebound spring 217 is fixed between the push-pull plate 216 and one of the stabilizing shaft plates 204. An outer sleeve plate 215 is rotatably provided on the push-pull plate 216, and a transmission push-pull shaft 214 is fixedly provided on the side of the outer sleeve plate 215. The transmission push-pull shaft 214 is connected to the braking mechanism. With this arrangement, the push-pull plate and the outer sleeve plate 215 can be continuously pushed by the rebound spring 217, thereby driving the brake toothed plate 210 to mesh with the brake teeth 208 on the support plate 207.

[0033] Furthermore, the braking mechanism includes a brake toothed plate 210, a flip-pull plate 213, and multiple brake teeth 208 disposed on the outer peripheral surface of the support plate 207. The brake toothed plate 210 is formed with grooves that mesh with the multiple brake teeth 208. A sliding sleeve 211 is fixedly provided on the upper surface of the support base 1. The brake toothed plate 210 is slidably sleeved in the sliding sleeve 211. This arrangement allows the sliding sleeve 211 to restrict the sliding trajectory of the brake toothed plate 210, thereby enabling the brake toothed plate 210 to mesh with the multiple brake teeth 208 on the outer peripheral surface of the support plate 207, thus achieving the braking effect after rotation adjustment.

[0034] Furthermore, the support base 1 is fitted with a flip-pull plate 213 through a formed flip hole, and a central fixed shaft 212 is fixed inside the flip hole. The flip-pull plate 213 is movably sleeved with the central fixed shaft 212 through a formed central movable hole. The upper side of the flip-pull plate 213 is hinged to the bottom surface of the brake toothed plate 210, and the lower side of the flip-pull plate 213 is movably sleeved with the transmission push-pull shaft 214 through a formed flip-pull shift hole. With this arrangement, when the transmission push-pull shaft 214 pushes and pulls to drive the flip-pull plate 213 to move, the flip-pull shift hole can accommodate the displacement space when the flip-pull plate 213 flips, so as not to affect the flip-pull plate 213 flipping. The central movable hole on the flip-pull plate 213 can accommodate the downward movement space when the flip-pull plate 213 flips and drives the brake toothed plate 210 to flip.

[0035] Furthermore, the support plate 207 is fixed with an inner sleeve pin hole shaft 209 that corresponds vertically to the chassis 407. This arrangement allows the chassis 407 to descend and press against the inner sleeve pin hole shaft 209, thereby tightening the key connection between the gear workpiece and the inner sleeve pin hole shaft 209 and improving the fastening effect on the gear workpiece.

[0036] Using the above structure, the gear workpiece is placed on the support plate 207 and sleeved on the inner sleeve pin hole shaft 209, and then connected by a key. Then, the electric push rod 401 on the pressing and clamping mechanism 4 is controlled to extend. The electric push rod 401 drives the pressing ring 406 and the base plate 407 to descend synchronously, so that the base plate 407 descends onto the inner sleeve pin hole shaft 209, and at the same time, the pressing ring 406 descends and presses against the gear workpiece to clamp it, and then milling is performed.

[0037] When a rotation angle is required, the pull-out rotating plate 205 on the positioning support mechanism 2 can be pulled, causing the pull-out rotating plate 205 to drive the push-pull plate 216 and the outer sleeve plate 215 to move synchronously and compress the rebound spring 217. At the same time, it drives the transmission push-pull shaft 214 to drive the flip push-pull plate 213 to rotate against the central fixed shaft 212. This rotation of the flip push-pull plate 213 causes the brake toothed plate 210 to move away from the support plate 207, thereby releasing the brake toothed plate 210 from the outer periphery of the support plate 207. The moving tooth 208 engages and brakes, then the pull-out rotating plate 205 is rotated to drive the worm 203 to rotate, which in turn drives the worm wheel 202 and the rotating support shaft 201 to rotate. This causes the rotating support shaft 201 to drive the gear workpiece on the support plate 207 to rotate synchronously. This facilitates the processing of another tooth groove during gear milling. At the same time, the pull-out rotating plate 205 is released, causing the rebound spring 217 to push the brake tooth groove plate 210 to lock onto the corresponding brake tooth 208, thus braking the support plate 207. This allows the milling process to continue.

[0038] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A positioning fixture for gear machining, characterized in that: It includes a support base (1) and a positioning support mechanism (2) provided on the support base (1), and a pressing and clamping mechanism (4) corresponding to the positioning support mechanism (2) is provided above the support base (1); The positioning support mechanism (2) includes a support disk (207) and a worm gear (202). A rotating support shaft (201) is rotatably mounted on the support base (1). The support disk (207) is located above the support base (1) and fixed at the upper end of the rotating support shaft (201). The worm gear (202) is located below the support base (1) and fixed at the lower end of the rotating support shaft (201). Two stabilizing shaft plates (204) are fixed on the bottom surface of the support base (1). Both stabilizing shaft plates (204) are rotatably engaged with the worm (203). The worm (203) is meshed with the worm gear (202). The pressing and clamping mechanism (4) includes a lifting and pulling plate (403) and a pressing ring (406) corresponding to the upper and lower parts of the support plate (207). A fixing plate (3) is fixed on the support base (1). An electric push rod (401) is provided on the fixing plate (3). Two slide rail columns (402) are sleeved on the fixing plate (3). The lifting and pulling plate (403) is fixedly connected to the lower side of the two slide rail columns (402). The protruding end of the electric push rod (401) is sleeved through the fixing plate (3) and fixedly connected to the lifting and pulling plate (403).

2. The positioning fixture for gear machining according to claim 1, characterized in that: Four side support plates (405) are fixed on the pressing ring (406). A rotating plate (404) is rotatably provided at the lower end of the electric push rod (401). The four side support plates (405) are respectively fixed on the four sides of the rotating plate (404). A base plate (407) is provided at the center of the pressing ring (406). A telescopic rod (408) is fixed on the bottom surface of the extended end of the electric push rod (401) opposite to the base plate (407). A buffer spring (409) is sleeved on the telescopic rod (408). The upper side of the buffer spring (409) is fixedly connected to the bottom surface of the extended end of the electric push rod (401), and the lower side of the buffer spring (409) is fixedly connected to the base plate (407).

3. A positioning fixture for gear machining according to claim 1, characterized in that: The worm (203) is provided with a pull-out rotating mechanism, and the pull-out rotating mechanism includes a pull-out rotating plate (205) that is slidably sleeved in the worm (203). The bottom surface of the support base (1) is fixed with a secondary stabilizing plate (206), and the secondary stabilizing plate (206) slides in cooperation with the pull-out rotating plate (205) through a rotating turntable.

4. A positioning fixture for gear machining according to claim 3, characterized in that: A push-pull plate (216) is fixedly provided on one side of the pull-out rotating plate (205). A rebound spring (217) is sleeved on the pull-out rotating plate (205). The rebound spring (217) is fixed between the push-pull plate (216) and one of the stabilizing shaft plates (204). An outer sleeve plate (215) is rotatably provided on the push-pull plate (216). A transmission push-pull shaft (214) is fixedly provided on the side of the outer sleeve plate (215). The transmission push-pull shaft (214) is connected to the braking mechanism.

5. A positioning fixture for gear machining according to claim 4, characterized in that: The braking mechanism includes a brake toothed plate (210), a flip-pull plate (213), and a plurality of brake teeth (208) disposed on the outer peripheral surface of the support plate (207). The brake toothed plate (210) is meshed with the plurality of brake teeth (208) through the formed toothed grooves. A sliding sleeve frame (211) is fixedly provided on the upper surface of the support base (1), and the brake toothed plate (210) is slidably sleeved in the sliding sleeve frame (211).

6. A positioning fixture for gear machining according to claim 5, characterized in that: The support base (1) is fitted with a flip-pull plate (213) through a shaped flip hole, and a central fixed shaft (212) is fixed inside the flip hole. The flip-pull plate (213) is movably connected to the central fixed shaft (212) through a shaped central movable hole. The upper side of the flip-pull plate (213) is hinged to the bottom surface of the brake toothed plate (210). The lower side of the flip-pull plate (213) is movably connected to the transmission push-pull shaft (214) through a shaped flip-pull hole.

7. A positioning fixture for gear machining according to claim 6, characterized in that: The support plate (207) is fixed with an inner sleeve pin hole shaft (209) that corresponds vertically to the base plate (407).

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