Automatic tooling fixture for processing agricultural machine gear

Abstract

This invention relates to the field of fixture technology, specifically to an automatic tooling fixture for processing agricultural machinery gears, comprising a rotating shaft, a housing, a workpiece, and a gear hobbing mechanism; the rotating shaft is mounted on a reduction motor and slidably connected to the bottom of the housing, the housing is mounted above the rotating shaft, and the workpiece is mounted above the housing, with one side meshing with the gear hobbing mechanism; characterized in that it further comprises a clamping mechanism, the bottom of which is mounted on the rotating shaft and installed inside the housing, and the top of which is connected to the workpiece; the clamping mechanism drives an eccentric pressure rod to rotate via a transmission wheel meshing with the gear, causing the pressure rod to drive a push rod to rotate outward along the center of the rotating shaft, thereby clamping the workpiece, and by utilizing the fact that the relative position between the transmission wheels remains unchanged after the workpiece is clamped, and the transmission wheels rotate around the rotating shaft, the pressure rod drives the clamping mechanism to rotate, thereby causing the clamping mechanism to drive the workpiece to rotate, and the workpiece is clamped tighter and tighter as it rotates.

Description

Technical Field

[0001] This invention relates to the field of fixture technology, and more specifically to an automatic tooling fixture for processing agricultural machinery gears. Background Technology

[0002] With the advancement of mechanized production, agricultural machinery has been widely used, leading to an increased demand for gears. Gear manufacturing primarily utilizes the generating method, with gear hobbing being the most common method. For agricultural machinery gears, to adapt to various environments and maximize load-bearing capacity, the precision requirements are not high, but the hardness requirements are relatively higher than other gears. Furthermore, gear hobbing requires the gear to rotate, ensuring that the entire gear's revolution is machined. This process generates severe vibrations, which affect the quality of the gear manufacturing and can even render the gear unusable. Therefore, a clamp is needed to secure the gear. Existing clamps utilize expansion within the gear during machining, allowing the clamp to hold the gear from the inside. This method is not only convenient but also efficient and stable.

[0003] Existing clamps use bolts to expand the clamp's interior to fix the gears. These gears, which are fixed by internal expansion, are often fixed at the center of the gear. This makes the gears more prone to loosening when facing rotation around the center, resulting in misalignment of the gear teeth.

[0004] In view of the above, in order to overcome the above technical problems, the present invention designs an automatic tooling fixture for processing agricultural machinery gears, which solves the above technical problems. Summary of the Invention

[0005] The technical objective of this invention is to provide an automatic tooling fixture for processing agricultural machinery gears. This fixture expands inside the gear to clamp it, and as the gear rotates, the fixture tightens its grip on the gear, giving the gear greater resistance to thrust when it rotates around a center.

[0006] To achieve the above-mentioned technical objectives, the present invention provides the following technical solution:

[0007] This invention provides an automatic tooling fixture for processing agricultural machinery gears, comprising a rotating shaft, a housing, a workpiece, and a gear hobbing device. The rotating shaft is mounted on a drive motor and slidably connected to the bottom of the housing. The housing is mounted above the rotating shaft, and the workpiece is mounted above the housing, with one side meshing with the gear hobbing device. It also includes a clamping mechanism, the bottom of which is mounted on the rotating shaft and is installed inside the housing. The top of the clamping mechanism is connected to the workpiece. The clamping mechanism drives a transmission wheel to rotate in the opposite direction through the rotation of the rotating shaft. The rotation of the transmission wheel drives a pressure rod to rotate around the center of the transmission wheel. The eccentric cam of the pressure rod drives a push rod to rotate around the center of the transmission wheel. The push rod rotates outward along the center of the rotating shaft to push the workpiece.

[0008] The clamping mechanism includes a chassis, a transmission wheel, a pressure rod, a limiting plate, a fixing plate, a separating plate, a push rod, a top cover, and a clamping wheel. The chassis is mounted on a rotating shaft. The transmission wheel is slidably mounted on the chassis in a circumferential array and meshes with gears on the rotating shaft. The bottom surface of the pressure rod is mounted above the transmission wheel. The limiting plate is penetrated by the pressure rod and is located above the transmission wheel. The pressure rod is slidably connected to the limiting plate within half a circumference along its axis, thereby restricting the rotation path of the pressure rod using the limiting plate. The fixing plate is mounted above the limiting plate via a bearing and is slidably connected to the pressure rod. The separating plate is mounted inside the fixing plate and is slidably connected to the top of the pressure rod. The push rod is mounted above the pressure rod and passes through the top cover. The top cover is mounted above the outer shell. The clamping wheel is mounted on the outer shell, and the clamping wheel is opposite to the gear hobbing, so that one side of the workpiece is squeezed during processing to prevent one side of the workpiece from lifting. The clamping wheel is located above the top cover and is slidably connected to the workpiece.

[0009] The clamping mechanism uses an eccentric pressure rod to push a push rod to clamp the workpiece, and the rotation of the shaft further tightens the clamping of the workpiece. A rotatable limiting plate allows the clamping mechanism to rotate, so that the clamping mechanism can still drive the workpiece to rotate after clamping it.

[0010] A meshing block is installed above the transmission wheel. Multiple right-angled triangular protrusions are arranged in a circular array above the meshing block. The bottom surface of the meshing block is higher than the top surface of the transmission wheel. The overall inclined plane of the triangular protrusion is opposite to the rotation direction of the shaft. The vertical surface of the triangular protrusion can push the pressure rod to rotate when the transmission wheel rotates.

[0011] The drive wheel is rotatably mounted on the chassis and can rotate around the gear on the chassis. The meshing block is slidably connected to the pressure rod. After the pressure rod is lifted, the pressure rod can rotate around the center of the meshing block, and the meshing block is still located inside the pressure rod.

[0012] The bottom surface of the pressure rod is connected to the upper front surface of the cam. The pressure rod cannot be installed above the center of the cam. The further away from the center of the cam, the greater the rotation amplitude of the clamping mechanism pressure rod. A groove is provided at the lower rear end of the cam. The inner wall of the groove engages with the outer surface of the meshing block. The groove is used for sliding connection with the meshing block. Push blocks are arranged in a circular array inside the groove. The push blocks are right-angled triangular structures. The push blocks can engage with the meshing blocks. The overall tilt direction of the push blocks is the same as the rotation direction of the rotating shaft. When the rotating shaft rotates, the meshing block can push the push blocks to drive the cam to rotate around the transmission wheel. A lifting plate is installed on the top surface of the pressure rod. The bottom surface of the lifting plate is slidably connected to the upper surface of the separation plate.

[0013] The pressure rod passes through the limiting plate, the fixing plate, and the separation plate, and is installed at the eccentric position of the cam. The push block can engage with the meshing block. When the rotating shaft rotates, it can drive the pressure rod to rotate through the meshing block. When the height of the separation plate changes, the separation plate can drive the height of the pressure rod to change through the lifting plate, and the lower part of the pressure rod always includes the meshing block.

[0014] The lower end face of the limiting plate has multiple rotating grooves arranged in a circular array. The rotating grooves are designed to allow sufficient space for the cam to rotate. The rotating grooves are Reuleaux triangles, which ensure that the cam can only rotate 180°. The rotating grooves also have semi-circular sliding grooves. The semi-circular structure restricts the rotation distance of the pressure rod, allowing it to move only within the semi-circular sliding groove. The two ends of the sliding groove are located on the same axis of the limiting plate, minimizing the closest distance between the pressure rod and the center of the limiting plate and maximizing the distance between the pressure rod and the circular shape. Multiple connecting rods are installed on the side of the limiting plate. The ends of the connecting rods are fitted with bearings and are slidably connected to the outer shell.

[0015] When the rotating shaft rotates and the clamping mechanism does not clamp the workpiece, the transmission wheel drives the cam to rotate, thereby causing the pressure rod to rotate; when the push rod clamps the workpiece, the limit plate will rotate under the drive of the pressure rod using the bearing.

[0016] The fixed plate has multiple driven grooves arranged in a circumferential array on its end face. The minimum number of driven grooves is two, which allows the pressure rod to spread outward along the driven grooves. The driven grooves are the same shape as the sliding grooves and are opposite each other, so that the pressure rod can drive the fixed plate to rotate along the driven grooves when it spreads outward. The upper end face of the outer ring of the fixed plate is provided with multiple fixed blocks arranged in a circumferential array. The fixed blocks are right-angled triangular structures, and the height of the fixed blocks is not less than the height of the meshing blocks. When the separating plate rotates, the pressure rod can be lifted by the fixed blocks, thereby separating the push block from the meshing block. The overall tilt direction of the fixed blocks is opposite to the rotation direction of the rotating shaft, and the fixed blocks mesh with the separating plate. When the rotating shaft rotates, the fixed plate can drive the separating plate to rotate together.

[0017] When the workpiece is clamped by the clamping mechanism, the pressure rod will drive the fixed plate to rotate around the center of the rotating shaft. At the same time, the fixed plate will drive the separation plate to rotate. When the rotating shaft stops, the fixed plate will be difficult to reverse under the action of the pressure rod because the reduction motor is difficult to reverse.

[0018] The separator plate has multiple rotating grooves arranged in a circumferential array on its end face. These grooves are used to push the pressure rod back to its initial position. The rotating grooves are located above the driven groove. A separator ring is installed on the upper end face of the separator plate. The separator ring has a cross structure inside. When the separator plate is rotated, the cross structure inside the separator ring makes the rotation more stable. The separator ring also has multiple separating grooves arranged in a circumferential array on its outer end face. These grooves make the separator ring and the fixed plate more tightly connected. The separating grooves engage with the fixed block. When the shaft rotates, the fixed plate cannot drive the separator plate to rotate, and the separator plate will not reverse. Multiple rotating rods are installed in a circumferential array on the outer side of the separator ring. Pushing the rotating rods makes the separator plate rotate and changes its height, thereby causing the pressure rod to rotate and change its height, releasing the jamming state of the transmission wheel.

[0019] The separating plate is driven to rotate by the pressure rod. When the rotating shaft stops, the fixed plate is fixed by the pressure rod and cannot rotate. However, the separating plate is pushed to rotate by the rotating rod, which in turn drives the pressure rod to rotate, thereby releasing the clamping state of the clamping mechanism and allowing the workpiece to be removed.

[0020] A teardrop-shaped rotating plate is installed above the push rod. The teardrop shape can withstand more radial load when the push rod rotates, thus making the push rod more stable. A support rod is installed at the rear end of the rotating plate, and a circular extrusion block is installed above the support rod. When the extrusion block extrudes inside the workpiece, the circular structure eliminates the damage to the inside of the workpiece caused by the corners.

[0021] The push rod is used to clamp the workpiece, and since the support rod is located at the end of the rotating plate, the push rod has high strength requirements.

[0022] The top cover has a frustum-shaped structure, which increases the hobbing space during gear machining. A circular through hole is provided on the upper surface of the top cover. Multiple sliding grooves are formed on the top cover by rotating outward along the central through hole. The sliding grooves that rotate outward are the same as the movement path of the push rod.

[0023] In gear machining, hobbing requires cutting off the outer side of the workpiece. The hobbing motion path is an up-and-down movement that gradually approaches the center of the workpiece. The top cover must provide sufficient space for the hobbing motion during the machining process.

[0024] The clamping wheels are made of rubber, enabling them to clamp the workpiece and restrict its vertical displacement. There is one clamping wheel at the top and one at the bottom, and both can rotate. The lower clamping wheel has a semi-circular structure; after rotating half a revolution, it becomes ineffective, allowing the upper clamping wheel to push the workpiece. The distance between the clamping wheels is less than the width of the workpiece, ensuring that after the workpiece is clamped by the push rod, it continues to be clamped by the clamping wheels. This prevents the clamping mechanism from reacting too slowly when the workpiece contacts the gear hobbing teeth, thus avoiding misalignment of the workpiece's teeth. The clamping wheels are mounted on the outer casing via a connecting plate.

[0025] The clamping wheels are used to limit the vertical displacement of the workpiece and increase the initial thrust of the clamping mechanism. When the workpiece rotates, the upper clamping wheel pushes the workpiece downward, making the workpiece more stable.

[0026] The beneficial effects of this invention are as follows:

[0027] 1. This invention solves the problem that existing internal expansion type tooling fixtures are not very effective in limiting the rotation of gears around the center by external thrust during the processing of gears in agricultural machinery, which easily leads to misalignment. The clamping mechanism makes the gear clamp tighter and tighter during rotation, thereby enhancing the gear's resistance to thrust when rotating around the center during processing.

[0028] 2. By setting up a transmission wheel, this invention solves the problem that the rotation of the shaft during gear processing is ineffective in clamping the gear by the fixture. As a result, the transmission wheel continuously clamps the gear during the rotation of the shaft, keeping the gear in a clamped state. Furthermore, since the shaft does not reverse during rotation, the rotation of the shaft further clamps the gear.

[0029] 3. By setting up a separation plate, this invention solves the problem of the cumbersome procedure of needing to rotate the bolts to eliminate the internal expansion of the clamp after the shaft stops and the gear is in a clamped state. This makes it more convenient to pick up the gear and allows the clamping mechanism to return to its initial position for re-clamping the gear. Attached Figure Description

[0030] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0031] The above and other aspects of the invention will now be described by way of example only, with reference to the accompanying drawings, in which:

[0032] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0033] Figure 2 This is a cross-sectional view of the clamping mechanism of the present invention;

[0034] Figure 3 This is a schematic diagram of the transmission wheel structure of the present invention;

[0035] Figure 4 This is a cross-sectional view of the pressure bar of the present invention;

[0036] Figure 5 This is a schematic diagram showing the positional relationship between the limiting plate and the fixing plate of the present invention;

[0037] Figure 6 This is a cross-sectional view of the limiting plate of the present invention;

[0038] Figure 7 This is a schematic diagram of the fixing plate structure of the present invention;

[0039] Figure 8 This is a schematic diagram of the separation plate structure of the present invention;

[0040] Figure 9 This is a schematic diagram of the push rod structure of the present invention;

[0041] Figure 10 This is a schematic diagram of the top cover structure of the present invention;

[0042] Figure 11 This is a schematic diagram of the clamping wheel structure of the present invention.

[0043] In the diagram: 1. Rotating shaft; 2. Housing; 3. Workpiece; 4. Gear hobbing; 5. Clamping mechanism; 51. Chassis; 52. Transmission wheel; 521. Engaging block; 53. Pressure rod; 531. Cam; 532. Push block; 533. Lifting plate; 54. Limiting plate; 541. Rotating groove; 542. Sliding groove; 543. Connecting rod; 55. Fixing plate; 551. Driven groove; 552. Fixing block; 56. Separating plate; 561. Rotating groove; 562. Separating rod; 563. Separating groove; 564. Rotating rod; 57. Push rod; 571. Rotating plate; 572. Support rod; 573. Extrusion block; 58. Top cover; 581. Sliding groove; 59. Clamping wheel; 591. Connecting plate. Detailed Implementation

[0044] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0045] like Figures 1 to 11As shown, an automatic tooling fixture for processing agricultural machinery gears includes a rotating shaft 1, a housing 2, a workpiece 3, and a gear hobbing 4. The rotating shaft 1 is mounted on a reduction motor and is slidably connected to the bottom of the housing 2. The housing 2 is mounted above the rotating shaft 1, and the workpiece 3 is mounted above the housing 2, with one side meshing with the gear hobbing 4. It also includes a clamping mechanism 5. The bottom of the clamping mechanism 5 is mounted on the rotating shaft 1 and is installed inside the housing 2. The top of the clamping mechanism 5 is connected to the workpiece 3. The clamping mechanism 5 drives the transmission wheel 52 to rotate in the opposite direction through the rotation of the rotating shaft 1. The rotation of the transmission wheel 52 drives the pressure rod 53 to rotate around the center of the transmission wheel 52. The eccentric cam 531 of the pressure rod 53 drives the push rod 57 to rotate around the center of the transmission wheel 52. The push rod 57 rotates outward along the center of the rotating shaft 1 to push the workpiece 3.

[0046] like Figures 1 to 11 As shown, the clamping mechanism 5 includes a chassis 51, transmission wheels 52, a pressure rod 53, a limiting plate 54, a fixing plate 55, a separating plate 56, a push rod 57, a top cover 58, and a clamping wheel 59. The chassis 51 is mounted on the rotating shaft 1. The transmission wheels 52 are slidably mounted on the chassis 51 in a circumferential array. The multiple transmission wheels 52 enable the push rod 57 to rotate outward along the center of the rotating shaft 1 and mesh with the gear on the rotating shaft 1. This prevents the clamping mechanism 5 from reducing the pushing force on the workpiece 3 after the gear drives the transmission wheels 52 to rotate. The bottom surface of the pressure rod 53 is mounted above the transmission wheels 52. The limiting plate 54 is penetrated by the pressure rod 53 and is located above the transmission wheels 52. The pressure rod 53 is slidably connected to the limiting plate 54 within half a circumference along the axis, thus restricting the pressure rod 53. The rotation path maximizes and minimizes the rotation amplitude of the pressure rod 53. The fixed plate 55 is mounted above the limiting plate 54 via a bearing and is slidably connected to the pressure rod 53. The separating plate 56 is installed inside the fixed plate 55 and is slidably connected to the top of the pressure rod 53. The push rod 57 is installed above the pressure rod 53 and passes through the top cover 58. The top cover 58 is installed above the outer shell 2. The clamping wheel 59 is installed on the outer shell 2 and is opposite to the gear hobbing 4. When processing gears, the clamping wheel 59 presses the upper side of the workpiece 3, thereby reducing the vibration of the workpiece 3 during processing and thus reducing the impact of vibration on the clamping mechanism 5. The clamping wheel 59 is located above the top cover 58 and is slidably connected to the workpiece 3.

[0047] When the rotating shaft 1 just starts to rotate, the transmission wheel 52 causes the pressure rod 53 to rotate through the rotating shaft 1, thereby causing the pressure rod 53 to push the push rod 57 to rotate outward around the rotating shaft 1, thereby clamping the workpiece 3. Under the action of the clamping wheel 59, the initial clamping cannot drive the workpiece 3 to rotate, so the clamping mechanism 5 continues to squeeze the workpiece 3 until the workpiece 3 can drive the clamping wheel 59 to rotate.

[0048] like Figure 2 and Figure 3As shown, a meshing block 521 is installed above the transmission wheel 52. Multiple right-angled triangular protrusions are arranged in a circular array above the meshing block 521. The bottom of the triangular protrusions does not directly contact the top of the transmission wheel 52. This allows the position of the pressure rod 53 to be restricted when the pressure rod 53 is disengaged from the meshing block 521, thereby making the clamping mechanism 5 operate more stably. The overall inclined plane of the triangular protrusion is opposite to the rotation direction of the rotating shaft 1. The right-angled triangular structure allows the transmission wheel 52 to push the pressure rod 53 to rotate when the rotating shaft 1 rotates, thereby clamping the workpiece 3 by the clamping mechanism 5.

[0049] In this invention, the rotation direction of the rotating shaft 1 is taken as the forward rotation. When the rotating shaft 1 rotates forward, the transmission wheel 52 reverses under the action of the gear. The reverse-rotating transmission wheel 52 drives the pressure rod 53 to reverse under the action of the meshing block 521. When the rotating shaft 1 stops, the up and down movement of the pressure rod 53 disengages the transmission wheel 52 from the pressure rod 53, and the pressure rod 53 does not disengage from the meshing block 521, thereby making the pressure rod 53 more stable during the restoration process.

[0050] like Figure 2 and Figure 4 As shown, the lower bottom surface of the pressure rod 53 is connected to the upper front end surface of the cam 531. A groove is provided at the lower rear end of the cam 531. The inner wall of the groove meshes with the outer surface of the meshing block 521, allowing the pressure rod 53 to rotate around the transmission wheel 52 via the cam 531. The offset installation of the pressure rod 53 and the meshing block 521 allows the pressure rod 53 to rotate with a larger amplitude. Push blocks 532 are arranged in a circular array inside the groove. The overall tilt direction of the push blocks 532 is the same as the rotation direction of the rotating shaft 1. The push blocks 532 have a right-angled triangular structure and can mesh with the meshing block 521, so that when the meshing block 521 reverses, it can drive the cam 531 to reverse. A lifting plate 533 is installed on the top surface of the pressure rod 53. The lower bottom surface of the lifting plate 533 is slidably connected to the upper end surface of the separation plate 56. When the separation plate 56 moves up and down, it can drive the pressure rod 53 to move up and down together, thereby disengaging the pressure rod 53 from the transmission wheel 52.

[0051] When the transmission wheel 52 drives the cam 531 to reverse, the reverse rotation of the cam 531 drives the pressure rod 53 to reverse, which in turn drives the push rod 57 to reverse. After the multiple push rods 57 reverse, they rotate outward to clamp the workpiece 3. When the hobbing gear 4 contacts the workpiece 3, the workpiece 3 pauses for a moment, and the pressure rod 53 continues to rotate, thereby clamping the workpiece 3 again.

[0052] like Figure 2 , Figure 5 and Figure 6As shown, the lower end face of the limiting plate 54 has a circumferential array of multiple rotating grooves 541. The rotating grooves 541 have a Reuleaux triangle structure, which allows the cam 531 to have sufficient rotation space when rotating. After the cam 531 rotates half a turn, it is restricted, reducing the lateral load on the pressure rod 53 and thus increasing the service life of the pressure rod 53. A sliding groove 542 is provided in the rotating groove 541, through which the pressure rod 53 passes. The sliding groove 542 has a semi-circular structure, which restricts the pressure rod 53 to rotate only half a turn. The two ends of the sliding groove 542 are located on the same axis of the limiting plate 54, so that the pressure rod 53 will only move further and further away from the center when rotating, thus ensuring the stability of the clamping mechanism 5. Multiple connecting rods 543 are installed on the side of the limiting plate 54. The multiple connecting rods 543 make the limiting plate 54 rotate more smoothly, thus making the rotation of the workpiece 3 more stable. The end of the connecting rod 543 is equipped with a bearing and is slidably connected to the inner wall of the outer shell 2.

[0053] When the pressure rod 53 rotates along the slide groove 542 and the push rod 57 clamps and fixes the workpiece 3, the pressure rod 53 will continue to rotate under the drive of the transmission wheel 52. The limiting plate 54 is slidably connected to the inner wall of the outer shell 2 through the connecting rod 543, so that the pressure rod 53 can drive the limiting plate 54 to rotate, thereby making the pressure rod 53 rotate around the rotating shaft 1 in reverse while the overall relative distance between the multiple pressure rods 53 remains unchanged.

[0054] like Figure 2 , Figure 5 and Figure 7 As shown, the fixing plate 55 is mounted on the limiting plate 54 via bearings, ensuring that the rotation of the limiting plate 54 does not affect the rotation of the fixing plate 55. Multiple driven grooves 551 are arranged in a circumferential array on the end face of the fixing plate 55. These driven grooves 551 are identical in shape to the sliding groove 542 and are vertically aligned, allowing sufficient space for the pressure rod 53 to rotate around the transmission wheel 52 when rotating outwards. Multiple fixing blocks 552 are arranged in a circumferential array on the upper end face of the outer ring of the fixing plate 55. These fixing blocks 552 are right-angled triangular structures used to engage with the separating plate 56, allowing the separating plate 56 to... The fixing block 552 is more tightly connected, and the height of the fixing block 552 is not lower than the height of the engaging block 521, so that when the separating plate 56 rotates, the pressure rod 53 can be raised to a height higher than the height of the engaging block 521, thereby separating the engaging block 521 from the pressure rod 53. The overall tilt direction of the fixing block 552 is opposite to the rotation direction of the rotating shaft 1, so that the separating plate 56 can only rotate in one direction when manually rotated forward, so that when the fixing plate 55 reverses, it cannot drive the separating plate 56 to rotate, but instead drives the separating plate 56 to reverse through the pressure rod 53, and the fixing block 552 engages with the separating plate 56.

[0055] After the workpiece 3 is clamped, the pressure rod 53 rotates in reverse around the gear under the drive of the transmission wheel 52. At the same time, the pressure rod 53 drives the fixing plate 55 to rotate in reverse. The rotating fixing plate 55 drives the separation plate 56 to rotate. When the rotating shaft 1 stops, the pressure rod 53 is retracted towards the center by making the separation plate 56 rotate in the forward direction, thereby releasing the clamping mechanism 5 from clamping the workpiece 3.

[0056] like Figure 2 Figure 8 As shown, the separation plate 56 has multiple rotating grooves 561 arranged in a circumferential array on its end face. The rotating grooves 561 are located above the driven groove 551. When the separation plate 56 is manually rotated clockwise, the rotating grooves 561 push the pressure rod 53 to retract towards the center. A separation ring 562 is installed on the upper end face of the separation plate 56. The separation ring 562 has a cross structure inside. The cross structure allows the thrust to be distributed more evenly to the entire separation ring 562 when it rotates, thus making the rotation of the separation ring 562 more stable. The outer end face of the separation ring 562 has multiple separation grooves 563 arranged in a circumferential array. The multiple separation grooves 563 make the separation ring 562 more stable when it rotates. The separation grooves 563 engage with the fixed block 552, and the separation ring 562 can only rotate when it rotates clockwise. Multiple rotating rods 564 are installed in a circumferential array on the outer side of the separation ring 562, which makes it easier to push the separation ring 562 to rotate.

[0057] After the rotating shaft 1 stops, the workpiece 3 is still clamped under the action of the transmission wheel 52. The operator pushes the separation ring 562 to rotate forward through the rotating rod 564, so that the separation plate 56 rotates and moves up and down at the same time. This causes the separation plate 56 to drive the lifting plate 533 to move up and down, and the lifting plate 533 to drive the pressure rod 53 to move up and down. At the same time, the pressure rod 53 returns to its initial position through the rotary groove 561, thereby releasing the clamping mechanism 5 from clamping the workpiece 3.

[0058] like Figure 2 and Figure 9 As shown, a teardrop-shaped rotating plate 571 is installed above the push rod 57. The teardrop-shaped rotating plate 571 enables the push rod 57 to withstand a greater load when rotating, thereby increasing the stability of the clamping mechanism 5. A support rod 572 is installed at the rear end of the rotating plate 571, which allows the support rod 572 to have a larger radius when rotating, thereby accommodating more gear inner diameters. A circular pressing block 573 is installed above the support rod 572. The circular pressing block 573 enables the push rod 57 to clamp the gear while preventing damage to the inner ring of the gear when rotating outward.

[0059] The pressure rod 53 reverses, causing the push rod 57 to reverse, which in turn causes the push rod 57 to rotate outward and clamp the gear. After the push rod 57 clamps the gear, it drives the gear to reverse. When the reverse gear contacts the forward-rotating hobbing gear 4, the push rod 57 clamps the gear again, thus making the gear rotate tighter and tighter.

[0060] like Figure 1 , Figure 2 and Figure 10 As shown, the top cover 58 has a frustum-shaped structure. When the hobbing gear 4 is machining the gear, the frustum structure can leave enough space for the hobbing gear 4 to move. A circular through hole is provided on the upper surface of the top cover 58. The top cover 58 has multiple sliding grooves 581 that are rotated outward along the central through hole. The sliding grooves 581 rotate in the same direction as the push rod 57, providing path guidance for the movement of the push rod 57.

[0061] As the push rod 57 rotates outward, the rotating push rod 57 moves along the sliding groove 581, making the push rod 57 more stable during the movement.

[0062] like Figure 1 and Figure 11 As shown, the clamping wheel 59 is made of rubber, which prevents damage to the workpiece 3 when it is squeezed. There is one clamping wheel 59 at the top and one at the bottom. The two clamping wheels 59 restrict the vertical displacement of the workpiece 3. The lower clamping wheel 59 has a semi-circular structure. The semi-circular structure allows the lower clamping wheel 59 to lose its restriction on the workpiece 3 after rotating half a revolution. The distance between the clamping wheels 59 is less than the width of the workpiece 3, so that the push rod 57 can continuously squeeze the workpiece 3 in the initial position until the workpiece 3 can push the clamping wheel 59 to rotate. The initial thrust of the clamping wheel 59 can be adjusted by adjusting the gap between the clamping wheels 59, thereby avoiding the workpiece 3 from being misaligned when it first contacts the hobbing gear 4 due to the excessive reaction time of the clamping mechanism 5. The clamping wheel 59 is mounted on the outer shell 2 through the connecting plate 591.

[0063] When the push rod 57 presses the workpiece 3, the clamping wheel 59 presses the workpiece 3, which makes the push rod 57 need a greater pushing force to push the workpiece 3 to rotate, thereby increasing the initial pushing force of the clamping mechanism 5. When the hobbing gear 4 contacts the workpiece 3, the clamping wheel 59 opposite to the hobbing gear 4 pushes the workpiece 3 downward, thereby preventing one end of the workpiece 3 from lifting up, thereby improving the machining accuracy of the gear. In addition, the rubber clamping wheel 59 can also absorb vibration and reduce the impact of vibration on the clamping mechanism 5.

[0064] During operation, when the rotating shaft 1 rotates under the drive of the reduction motor, the rotation of the rotating shaft 1 drives the gear at the top of the rotating shaft 1 to rotate. After the gear rotates, it drives the multiple transmission wheels 52 on the chassis 51 to rotate. Before the workpiece 3 is clamped, the rotation of the transmission wheels 52 drives the cam 531 to rotate. The rotation of the cam 531 drives the pressure rod 53 at the front end of the cam 531 to rotate around the axis of the cam 531. The upper end of the pressure rod 53 rotates in the limiting plate 54, the fixing plate 55 and the separating plate 56. The lifting plate 533 installed at the top of the pressure rod 53 is connected to the push rod 57, thereby driving the push rod 57 to rotate around the axis of the cam 531. After the push rod 57 rotates, it drives the extrusion block 573 to rotate outward. With the cooperation of multiple extrusion blocks 573, the workpiece 3 is fixed.

[0065] After the extrusion block 573 initially fixes the workpiece 3, under the action of the clamping wheel 59, the extrusion block 573 cannot push the workpiece 3 to rotate, thereby prompting the extrusion block 573 to continue to extrude the workpiece 3, thereby increasing the initial thrust of the clamping mechanism 5.

[0066] After the rotating shaft 1 rotates and the workpiece 3 is clamped, multiple transmission wheels 52, whose relative positions are fixed, rotate around the gear on the base plate under the rotation of the gear. The rotation of the transmission wheels 52 around the gear drives the pressure rod 53 to rotate around the gear together. The pressure rod 53 pushes the limiting plate 54 to rotate, so that the limiting plate 54 rotates on the inner wall of the outer shell 2 through the bearing at the end of the connecting rod 543. At the same time, the pressure rod 53 pushes the fixing plate 55 and the separating plate 56 to rotate. The rotation of the pressure rod 53 around the gear also drives the push rod 57 to rotate around the gear together, so that the push rod 57 drives the clamped workpiece 3 to rotate together, so that the rollers process the workpiece 3 evenly.

[0067] When the processing is completed, the reduction motor stops, thereby stopping the rotation of the rotating shaft 1. This forces the transmission wheel 52 to stop moving and fix its position, ensuring that the workpiece 3 is always clamped. The operator opens the outer casing 2 and uses the rotating rod 564 to push the separation ring 562 to rotate, causing the separation ring 562 to rotate unidirectionally around the center of the fixed plate 55. While rotating, the separation ring 562 also moves up and down, causing the separation plate 56 to rotate and move up and down. When the separation plate 56 moves up and down, it drives the pressure rod 53 to move up and down through the lifting plate 533. At the same time, the rotation of the separation plate 56 also pushes the pressure rod 53 to rotate through the rotary groove 561. This causes the pressure rod 53 to disengage from the transmission wheel 52 when it moves up and down. After disengaging, the pressure rod 53 rotates back to its initial position, causing the pressure rod 53 to drive the push rod 57 to reverse, thereby releasing the clamping of the workpiece 3.

[0068] The description herein is provided to enable those skilled in the art to implement or use the present disclosure. Various modifications to the present disclosure will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other variations without departing from the scope of the disclosure. Therefore, this disclosure is not limited to the examples and designs described herein, but should be given the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. An automatic tooling fixture for processing agricultural machinery gears, comprising a rotating shaft (1), a housing (2), a workpiece (3), and a gear hobbing device (4); the rotating shaft (1) is mounted on a reduction motor and slidably connected to the bottom of the housing (2), the housing (2) is mounted above the rotating shaft (1), and the workpiece (3) is mounted above the housing (2), with one side meshing with the gear hobbing device (4); characterized in that, It also includes a clamping mechanism (5), which has a rotating shaft (1) installed at the bottom and is installed inside the outer shell (2). The top of the clamping mechanism (5) is connected to the workpiece (3). The clamping mechanism (5) drives the transmission wheel (52) to rotate in the opposite direction through the rotation of the rotating shaft (1). The rotation of the transmission wheel (52) drives the pressure rod (53) to rotate around the center of the transmission wheel (52). The eccentric cam (531) of the pressure rod (53) drives the push rod (57) to rotate around the center of the transmission wheel (52). The push rod (57) rotates outward along the center of the rotating shaft (1) to push the workpiece (3). The clamping mechanism (5) includes a chassis (51), a transmission wheel (52), a pressure rod (53), a limiting plate (54), a fixing plate (55), a separating plate (56), a push rod (57), a top cover (58), and a clamping wheel (59). The chassis (51) is mounted on a rotating shaft (1). The transmission wheel (52) is circumferentially arrayed and slidably mounted on the chassis (51) and meshes with a gear on the rotating shaft (1). The bottom surface of the pressure rod (53) is mounted above the transmission wheel (52). The limiting plate (54) is penetrated by the pressure rod (53) and is located above the transmission wheel (52). The pressure rod (53) interacts with the limiting plate (59) within half a circumference along the axis. The position plate (54) is slidably connected. The fixed plate (55) is installed above the limiting plate (54) by bearing and is slidably connected to the pressure rod (53). The separation plate (56) is installed inside the fixed plate (55) and is slidably connected to the top of the pressure rod (53). The push rod (57) is installed above the pressure rod (53) and passes through the top cover (58). The top cover (58) is installed above the outer shell (2). The clamping wheel (59) is installed on the outer shell (2) and is opposite to the hobbing gear (4). The clamping wheel (59) is located above the top cover (58) and is slidably connected to the workpiece (3).

2. The automatic tooling fixture for processing agricultural machinery gears according to claim 1, characterized in that: A meshing block (521) is installed above the transmission wheel (52). Multiple right-angled triangular protrusions are arranged in a circular array above the meshing block (521). The overall inclined plane of the triangular protrusions is opposite to the rotation direction of the rotating shaft (1).

3. The automatic tooling fixture for processing agricultural machinery gears according to claim 2, characterized in that: The bottom surface of the pressure rod (53) is connected to the upper front surface of the cam (531). The lower rear end of the cam (531) has a groove. The inner wall of the groove meshes with the outer surface of the meshing block (521). Push blocks (532) are arranged in a circular array inside the groove. The overall tilt direction of the push blocks (532) is the same as the rotation direction of the rotating shaft (1). A lifting plate (533) is installed on the top surface of the pressure rod (53). The bottom surface of the lifting plate (533) is slidably connected to the upper surface of the separation plate (56).

4. The automatic tooling fixture for processing agricultural machinery gears according to claim 3, characterized in that: The lower end face of the limiting plate (54) is provided with a plurality of rotating grooves (541) arranged in a circular array. A sliding groove (542) is provided in the rotating groove (541). The sliding groove (542) is a semi-circular structure, and the two ends of the sliding groove (542) are located on the same axis of the limiting plate (54). A plurality of connecting rods (543) are installed on the side of the limiting plate (54). The end of the connecting rod (543) is provided with a bearing and is slidably connected to the inner wall of the outer shell (2).

5. An automatic tooling fixture for processing agricultural machinery gears according to claim 4, characterized in that: The end face of the fixed plate (55) has a circumferential array of multiple driven grooves (551). The driven grooves (551) and the sliding grooves (542) have the same shape and are opposite each other. The upper end face of the outer ring of the fixed plate (55) is provided with multiple fixed blocks (552). The height of the fixed blocks (552) is not lower than the height of the meshing blocks (521). The overall tilt direction of the fixed blocks (552) is opposite to the rotation direction of the rotating shaft (1), and the fixed blocks (552) mesh with the separating plate (56).

6. An automatic tooling fixture for processing agricultural machinery gears according to claim 5, characterized in that: The separation plate (56) has a plurality of rotating grooves (561) arranged in a circumferential array on its end face. The rotating grooves (561) are located above the driven groove (551). A separation ring (562) is installed on the upper end face of the separation plate (56). The separation ring (562) has a cross structure inside. The outer end face of the separation ring (562) has a plurality of separation grooves (563) arranged in a circumferential array. The separation grooves (563) engage with the fixed block (552). A plurality of rotating rods (564) are installed in a circumferential array on the outer side of the separation ring (562).

7. An automatic tooling fixture for processing agricultural machinery gears according to claim 6, characterized in that: A teardrop-shaped rotating plate (571) is installed above the push rod (57), a support rod (572) is installed at the rear end of the rotating plate (571), and a circular extrusion block (573) is installed above the support rod (572).

8. An automatic tooling fixture for processing agricultural machinery gears according to claim 7, characterized in that: The top cover (58) has a frustum-shaped structure. A circular through hole is provided on the upper surface of the top cover (58). Multiple sliding grooves (581) are provided on the top cover (58) as it rotates outward along the central through hole.

9. An automatic tooling fixture for processing agricultural machinery gears according to claim 8, characterized in that: The clamping wheel (59) is made of rubber, and there is one clamping wheel (59) installed at the top and one at the bottom. The lower clamping wheel (59) has a semi-circular structure, and the distance between the clamping wheels (59) is less than the width of the workpiece (3). The clamping wheel (59) is installed on the outer shell (2) through the connecting plate (591).

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