Gear processing positioning device

Abstract

The present invention discloses a gear processing positioning device, which belongs to the field of gear processing technology. The gear processing positioning device includes a base, a placement table is fixedly installed on the surface of the base, and a through groove is provided inside the base and the placement table, and an opening mechanism is slidably connected inside the through groove; a driving mechanism for driving the opening mechanism to move downward is fixedly installed inside the base, three groups of linkage mechanisms are provided on the surface of the placement table, and three groups of locking mechanisms are slidably connected inside the placement table, and the opening mechanism is placed in the middle of the gear, and the hinge between the first bracket and the second bracket fits in the inner wall of the gear to fix the gear for the first time, and the ends of the first bracket and the second bracket are provided with convex points to increase the friction with the inner wall of the gear. At this time, the driving mechanism is started again to move the opening mechanism downward and simultaneously drive the gear to contact with the surface of the placement table and apply downward force to the gear surface, thereby further improving the fixing effect of the gear.

Description

Technical Field

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

[0002] Gears are mechanical parts with tooth-like structures that transmit power and motion through mutual meshing to achieve speed, torque conversion or direction change. According to the axis position and tooth shape characteristics, they can be divided into parallel axis gears, intersecting axis gears and staggered axis gears. They have the advantages of high transmission accuracy, wide applicable power range and long service life. They are widely used in the automotive industry, aerospace, engineering machinery and other fields.

[0003] During the manufacturing process of gears, there are often many burrs and tiny bumps on their surfaces, which affect the appearance quality of the gears. In order to ensure that the quality of the gears meets the design requirements and usage standards, they need to be finely polished. This process is usually completed manually by staff. They use handheld tools to fix the gears and then perform polishing operations. However, in actual operation, due to the large friction between the polishing tool and the gear surface, and this friction will continue to change during the polishing process, the gears are prone to movement or rotation, thereby affecting the polishing effect and accuracy. In order to solve this problem, a special clamping device is needed to fix the gears.

[0004] Therefore, there is an urgent need to provide a gear processing positioning device to solve the above problems. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a gear processing positioning device.

[0006] The technical solution adopted to solve the above technical problems is: to provide a gear processing positioning device, comprising a base, a placement table fixedly mounted on the surface of the base, a through slot formed inside the base and the placement table, and a support mechanism slidably connected inside the through slot;

[0007] A driving mechanism for driving the expansion mechanism to move downward is fixedly installed inside the base, three sets of linkage mechanisms are provided on the surface of the placement table, and three sets of locking mechanisms are slidably connected inside the placement table. The linkage mechanism is used to drive the locking mechanism to move, and the locking mechanism includes a moving block, and a telescopic mechanism is provided on the surface of the moving block for adjusting the length of the locking mechanism;

[0008] The front end of the locking mechanism is provided with a locking mechanism for limiting the gear, and the connection between the telescopic mechanism and the locking mechanism is provided with a rotating mechanism for adjusting the angle of the locking mechanism.

[0009] The present invention is further configured as follows: the expansion mechanism includes a support block, an electric telescopic rod is fixedly installed on the surface of the support block, a first fixed block is fixedly installed on the end of the electric telescopic rod, three groups of first brackets are hinged on the surface of the support block, the second bracket is hinged on the surface of the first fixed block, one end of the first bracket is hinged to one end of the second bracket, and one end of the first bracket and one end of the second bracket are fixedly installed with multiple protrusions, an internal thread is provided inside the support block, a symmetrical auxiliary block is fixedly installed on the surface of the support block, a symmetrical guide rod is fixedly installed inside the through groove, the auxiliary block is slidably connected to the surface of the guide rod, the driving mechanism includes a motor, the output end of the motor is transmission-connected to the transmission rod, the end surface of the transmission rod is provided with an external thread, and the external thread is meshed with the internal thread.

[0010] Through the above technical solution, the expansion mechanism is placed in the middle of the gear, the electric telescopic rod is started, and the first fixed block at the end of the electric telescopic rod moves downward, thereby causing the second bracket to move downward, the angle between the first bracket and the second bracket becomes smaller, and the hinge between the first bracket and the second bracket extends outward, and the distance between the hinge and the electric telescopic rod becomes longer, until the hinge between the first bracket and the second bracket fits into the inner wall of the gear to fix the gear for the first time. The ends of the first bracket and the second bracket are provided with raised points to increase the friction with the inner wall of the gear. At this time, the driving mechanism is started again, and through the meshing action of the internal thread and the external thread, the expansion mechanism moves downward while driving the gear to contact the surface of the placement table and exert a downward force on the gear surface, further improving the fixing effect of the gear.

[0011] The present invention is further configured as follows: the linkage mechanism includes three rotating brackets, one end of the three rotating brackets is fixedly mounted with a second bevel gear, the surface of the transmission rod is fixedly mounted with a first bevel gear, the first bevel gear is respectively meshed with the three second bevel gears, the other end of the rotating bracket is fixedly mounted with a driving sprocket, three threaded rods are rotatably connected inside the placement table, the ends of the threaded rods are fixedly mounted with driven sprockets, and a chain is meshed between the driving sprocket and the surface of the driven sprocket.

[0012] Through the above technical solution, when the transmission rod rotates, the meshing relationship between the first bevel gear and the second bevel gear causes the three sets of rotating brackets to rotate simultaneously, and the driving sprocket at the other end of the rotating bracket follows the rotation, and the meshing relationship between the chain and the driving sprocket and the driven sprocket enables the rotating bracket to drive the threaded rod to rotate when it rotates. When the threaded rod rotates, it drives the locking mechanism to move toward the middle of the placement table to lock and limit the gear on the surface of the placement table again, thereby preventing the gear from being displaced during grinding and affecting the grinding effect.

[0013] The present invention is further configured as follows: three first sliding grooves are opened on the surface of the placement table, the three threaded rods are rotatably connected inside the three first sliding grooves, the three groups of locking mechanisms are slidably connected inside the first sliding grooves, and the three moving blocks are slidably connected inside the three first sliding grooves.

[0014] Through the above technical solution, the first slide groove makes the movable block more stable when moving toward the middle of the placement table, while ensuring that the clamping block at the front end of the locking mechanism can stably clamp the gear, avoiding position displacement of the locking mechanism during movement, thereby affecting the clamping effect.

[0015] The present invention is further configured as follows: a second fixed block is fixedly mounted on the surface of the moving block, a telescopic slot is provided inside the second fixed block, and the telescopic mechanism includes an extension block, which is slidably connected inside the telescopic slot.

[0016] Through the above technical solution, according to the different sizes of gears, the position of the extension block in the telescopic slot is adjusted before use to ensure that the clamping block at the front end of the locking mechanism can stably clamp the gear, avoiding errors in the clamping of the gear due to different gear sizes and affecting the clamping effect.

[0017] The present invention is further configured as follows: a symmetrical positioning rod is slidably connected inside the telescopic groove, a plurality of positioning holes are opened on the surface of the extension block, and the positioning rod is movably inserted inside the positioning holes.

[0018] With the above technical solution, after the extension block is inserted into the telescopic slot, the positioning rod is inserted into the corresponding positioning hole to fix the position of the extension block, thereby preventing the position of the extension block from being offset due to the reaction force when clamping the gear.

[0019] The present invention is further configured as follows: a symmetrical positioning groove is opened inside the second fixed block, the positioning rod is slidably connected inside the positioning groove, a positioning ring is slidably connected inside the positioning groove, the positioning ring is fixedly connected to the surface of the positioning rod, a first spring is fixedly installed on the surface of the positioning ring, the other end of the first spring is fixedly connected inside the positioning groove, and the positioning rod passes through the interior of the first spring.

[0020] Through the above technical solution, in the initial state, the positioning rod is inserted into the telescopic slot. When the extension block needs to be fixed in position, the positioning rod is pulled out. At this time, the positioning rod is retracted into the positioning slot, and the positioning ring squeezes the first spring. After the extension block is inserted into the telescopic slot to determine the length, the positioning rod is released. Under the reset action of the first spring, the positioning ring is squeezed to drive the positioning rod to be inserted into the corresponding positioning hole, thereby fixing the position of the extension block.

[0021] The present invention is further configured as follows: the locking mechanism includes a third fixed block, the end of the extension block is hinged to the inside of the third fixed block, a locking block is slidably connected inside the third fixed block, a connecting rod is fixedly installed on the surface of the locking block, a connecting plate is fixedly installed on the end of the connecting rod, a second spring is fixedly installed on one side of the connecting plate, a second sliding groove is opened inside the third fixed block, the connecting plate is slidably connected to the inside of the second sliding groove, and the other end of the second spring is fixedly connected to the inside of the second sliding groove.

[0022] Through the above technical solution, after the length of the extension block is determined, in order to ensure that the clamping block can clamp gears of various sizes, the clamping block is connected to the connecting plate through a connecting rod, and the connecting plate slides in the second sliding groove inside the third fixed block, thereby further providing adjustable space for the overall length of the locking mechanism. The second spring cooperates with the second sliding groove to perform secondary adjustment on the position of the clamping block, thereby improving the clamping efficiency of the clamping block for gears of various sizes.

[0023] The present invention is further configured as follows: the rotating mechanism includes a fourth fixed block, the fourth fixed block is fixedly mounted on the surface of the third fixed block, a pin is movably inserted inside the fourth fixed block, a plurality of sockets are opened on the end surface of the extension block, the sockets are distributed in a semicircular shape, and the pin is movably inserted inside the sockets.

[0024] Through the above technical solution, in order to ensure that the card block can be stably inserted between two adjacent teeth on the gear surface, the angle of the card block can be adjusted when the teeth of the card block are on the same horizontal line, and the third fixed block is rotated as a whole. At this time, the fourth fixed block follows the rotation. After the position of the card block is determined, the pin is inserted into the corresponding socket to fix the position of the third fixed block, thereby ensuring that the card block can be stably inserted between two adjacent teeth on the gear surface.

[0025] The present invention is further configured as follows: an arc-shaped groove is provided on the surface of the third fixed block, a docking block is fixedly installed inside the arc-shaped groove, a rotating shaft is fixedly installed inside the docking block, a docking hole is provided at the end of the extension block, the docking block is rotatably connected inside the docking hole, a rotating shaft groove is provided at the end of the extension block, the rotating shaft is rotatably connected inside the rotating shaft groove, and the end of the extension block is rotatably connected inside the arc-shaped groove.

[0026] Through the above technical solution, the arc groove provides space for the rotation of the third fixed block, and the docking block cooperates with the extension block through the connection of the rotating shaft to realize rotation. After the length of the extension block is determined, the angle of the clamping block can be adjusted again as needed, so that it is suitable for gear clamping work of different sizes.

[0027] The beneficial effects of the present invention are as follows:

[0028] 1. The present invention is provided with a spreading mechanism, which is placed in the middle of the gear. The hinge of the first bracket and the second bracket is in contact with the inner wall of the gear to fix the gear for the first time. The ends of the first bracket and the second bracket are provided with bumps to increase the friction with the inner wall of the gear. At this time, the driving mechanism is activated to move the spreading mechanism downward and simultaneously drive the gear to contact the surface of the placement table and exert downward force on the gear surface, further improving the fixing effect of the gear.

[0029] 2. The present invention is provided with a driving mechanism. When the driving mechanism is started, the three sets of locking mechanisms can move toward the middle of the gear through the setting of the linkage mechanism. The three sets of clamping blocks are clamped inside two adjacent teeth on the surface of the gear, further improving the clamping ability of the gear and preventing the gear from moving during grinding and affecting the grinding effect.

[0030] 3. The present invention is provided with a telescopic mechanism and a rotation mechanism. In order to ensure that the locking mechanism can clamp gears of different sizes, the length of the extension block can be adjusted before use. After the position is determined, the position of the extension block is fixed by the cooperation of the positioning rod and the positioning hole. In order to ensure that the card block can be stably inserted between two adjacent teeth on the gear surface, the angle of the card block can be adjusted when the teeth of the card block are on the same horizontal line. The third fixed block is rotated as a whole. At this time, the fourth fixed block follows the rotation. After the position of the card block is determined, the pin is inserted into the corresponding jack to fix the position of the third fixed block, thereby ensuring that the card block can be stably inserted between two adjacent teeth on the gear surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0032] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention;

[0033] Figure 3 This is a schematic diagram of the structure of the opening mechanism of the present invention;

[0034] Figure 4 It is a schematic structural diagram of the locking mechanism of the present invention;

[0035] Figure 5 It is a schematic structural diagram of the telescopic mechanism and the engaging mechanism of the present invention;

[0036] Figure 6 It is a schematic diagram of the linkage mechanism structure of the present invention;

[0037] Figure 7 for Figure 2 Enlarged view of point A in the middle;

[0038] Figure 8 for Figure 2 Enlarged view of point B in the middle;

[0039] Figure 9 for Figure 3 Enlarged view of point C in the middle;

[0040] Figure 10 for Figure 4 Enlarged view of point D in the middle;

[0041] Figure 11 for Figure 5 Enlarged view of point E in the middle.

[0042] Reference numerals: 1, base; 2, placement table; 21, through slot; 3, expansion mechanism; 31, support block; 32, electric telescopic rod; 33, first fixed block; 34, first bracket; 35, second bracket; 36, bump; 37, internal thread; 38, auxiliary block; 39, guide rod; 4, driving mechanism; 41, motor; 42, transmission rod; 43, external thread; 44, first bevel gear; 5, linkage mechanism; 51, rotating bracket; 52, second bevel gear; 53, driving sprocket; 54, threaded rod; 55, driven sprocket; 56, chain; 57, first slide groove; 6. Locking mechanism; 61. Moving block; 62. Second fixed block; 63. Telescopic slot; 64. Positioning rod; 65. Positioning slot; 66. Positioning ring; 67. First spring; 7. Telescopic mechanism; 71. Extension block; 72. Positioning hole; 8. Engaging mechanism; 81. Third fixed block; 82. Engaging block; 83. Connecting rod; 84. Connecting plate; 85. Second spring; 86. Second slide slot; 9. Rotating mechanism; 91. Fourth fixed block; 92. Latch; 93. Socket; 94. Docking block; 95. Rotating shaft; 96. Docking hole; 97. Rotating shaft slot; 98. Arc slot. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0044] See also Figures 1-11 The present application provides a gear processing positioning device, comprising a base 1, a placement table 2 fixedly mounted on the surface of the base 1, a through slot 21 being provided inside the base 1 and the placement table 2, and a support mechanism 3 being slidably connected inside the through slot 21;

[0045] like Figure 3As shown, the expansion mechanism 3 includes a support block 31, an electric telescopic rod 32 is fixedly installed on the surface of the support block 31, and a first fixed block 33 is fixedly installed on the end of the electric telescopic rod 32. Three groups of first brackets 34 are hinged on the surface of the support block 31, and a second bracket 35 is hinged on the surface of the first fixed block 33. One end of the first bracket 34 is hinged to one end of the second bracket 35, and one end of the first bracket 34 and one end of the second bracket 35 are fixedly installed with multiple protrusions 36. An internal thread 37 is provided inside the support block 31, and symmetrical auxiliary blocks 38 are fixedly installed on the surface of the support block 31. A symmetrical guide rod 39 is fixedly installed inside the through groove 21, and the auxiliary block 38 is slidably connected to the surface of the guide rod 39. The driving mechanism 4 includes a motor 41, and the output end of the motor 41 is transmission-connected to the transmission rod 42. The end surface of the transmission rod 42 is provided with an external thread 43, and the external thread 43 engages with the internal thread 37.

[0046] In this embodiment: the expansion mechanism 3 is placed in the middle of the gear, the electric telescopic rod 32 is started, and the first fixing block 33 at the end of the electric telescopic rod 32 moves downward, thereby causing the second bracket 35 to move downward, and the angle between the first bracket 34 and the second bracket 35 becomes smaller and the hinge between the first bracket 34 and the second bracket 35 extends outward, and the distance between the hinge and the electric telescopic rod 32 becomes longer, until the hinge between the first bracket 34 and the second bracket 35 is in contact with the inner wall of the gear to fix the gear for the first time. The ends of the first bracket 34 and the second bracket 35 are provided with protrusions 36 to increase the friction with the inner wall of the gear. At this time, the driving mechanism 4 is started again, and through the meshing action of the internal thread 37 and the external thread 43, the expansion mechanism 3 moves downward while driving the gear to contact the surface of the placement table 2 and exert a downward force on the gear surface, further improving the fixing effect of the gear.

[0047] A driving mechanism 4 for driving the spreading mechanism 3 downward is fixedly installed inside the base 1. Three sets of linkage mechanisms 5 are provided on the surface of the placement table 2. Three sets of locking mechanisms 6 are slidably connected inside the placement table 2. The linkage mechanism 5 is used to drive the locking mechanism 6 to move. The locking mechanism 6 includes a moving block 61. The surface of the moving block 61 is provided with a telescopic mechanism 7 for adjusting the length of the locking mechanism 6.

[0048] like Figure 2 and Figure 7 As shown, the linkage mechanism 5 includes three rotating brackets 51, one end of the three rotating brackets 51 is fixedly mounted with a second bevel gear 52, the surface of the transmission rod 42 is fixedly mounted with a first bevel gear 44, the first bevel gear 44 is respectively meshed with the three second bevel gears 52, the other end of the rotating bracket 51 is fixedly mounted with a driving sprocket 53, the interior of the placement table 2 is rotatably connected with three threaded rods 54, the ends of the threaded rods 54 are fixedly mounted with driven sprockets 55, and a chain 56 is meshed with the surfaces of the driving sprocket 53 and the driven sprocket 55;

[0049] In this embodiment: when the transmission rod 42 rotates, the three groups of rotating brackets 51 rotate simultaneously through the meshing relationship between the first bevel gear 44 and the second bevel gear 52, and the driving sprocket 53 at the other end of the rotating bracket 51 follows the rotation, and the meshing relationship between the chain 56 and the driving sprocket 53 and the driven sprocket 55 is used to make the rotating bracket 51 drive the threaded rod 54 to rotate when it rotates. When the threaded rod 54 rotates, it drives the locking mechanism 6 to move toward the middle of the placement table 2 to lock the gears on the surface of the placement table 2 again, thereby preventing the gears from being displaced during grinding and affecting the grinding effect.

[0050] like Figure 2 As shown, three first chutes 57 are opened on the surface of the placement table 2, the three threaded rods 54 are rotatably connected inside the three first chutes 57, the three sets of locking mechanisms 6 are slidably connected inside the first chutes 57, and the three moving blocks 61 are slidably connected inside the three first chutes 57;

[0051] In this embodiment: the first slide groove 57 makes the moving block 61 more stable when moving toward the middle of the placement table 2, while ensuring that the block 82 at the front end of the locking mechanism 6 can stably clamp the gear, avoiding position displacement of the locking mechanism 6 during movement, thereby affecting the clamping effect.

[0052] like Figure 4 As shown, a second fixed block 62 is fixedly mounted on the surface of the moving block 61, a telescopic slot 63 is opened inside the second fixed block 62, and the telescopic mechanism 7 includes an extension block 71, which is slidably connected to the inside of the telescopic slot 63;

[0053] In this embodiment: according to the different sizes of gears, the position of the extension block 71 in the telescopic slot 63 is adjusted before use to ensure that the clamping block 82 at the front end of the locking mechanism 6 can stably clamp the gear, avoiding errors in the clamping of the gear due to different gear sizes and affecting the clamping effect.

[0054] like Figure 4 and Figure 10 As shown, a symmetrical positioning rod 64 is slidably connected to the interior of the telescopic slot 63, and a plurality of positioning holes 72 are opened on the surface of the extension block 71, and the positioning rod 64 is movably inserted into the interior of the positioning hole 72;

[0055] In this embodiment, after the extension block 71 is inserted into the telescopic slot 63 , the positioning rod 64 is inserted into the corresponding positioning hole 72 to fix the position of the extension block 71 , thereby preventing the position of the extension block 71 from being offset due to the reaction force when clamping the gear.

[0056] like Figure 10As shown, a symmetrical positioning groove 65 is formed inside the second fixing block 62, a positioning rod 64 is slidably connected to the positioning groove 65, a positioning ring 66 is slidably connected to the positioning groove 65, the positioning ring 66 is fixedly connected to the surface of the positioning rod 64, a first spring 67 is fixedly mounted on the surface of the positioning ring 66, the other end of the first spring 67 is fixedly connected to the positioning groove 65, and the positioning rod 64 passes through the interior of the first spring 67;

[0057] In this embodiment: in the initial state, the positioning rod 64 is inserted into the telescopic slot 63. When the extension block 71 needs to be fixed in position, the positioning rod 64 is pulled out. At this time, the positioning rod 64 is retracted into the positioning slot 65, and the positioning ring 66 squeezes the first spring 67. After the extension block 71 is inserted into the telescopic slot 63 to determine the length, the positioning rod 64 is released. Under the reset action of the first spring 67, the positioning ring 66 is squeezed to drive the positioning rod 64 to be inserted into the corresponding positioning hole 72, thereby fixing the position of the extension block 71.

[0058] A locking mechanism 8 for limiting the position of the gear is provided at the front end of the locking mechanism 6 , and a rotating mechanism 9 for adjusting the angle of the locking mechanism 8 is provided at the connection between the telescopic mechanism 7 and the locking mechanism 8 .

[0059] like Figure 5 As shown, the locking mechanism 8 includes a third fixed block 81, the end of the extension block 71 is hinged to the inside of the third fixed block 81, a clamping block 82 is slidably connected to the inside of the third fixed block 81, a connecting rod 83 is fixedly installed on the surface of the clamping block 82, a connecting plate 84 is fixedly installed on the end of the connecting rod 83, a second spring 85 is fixedly installed on one side of the connecting plate 84, a second sliding groove 86 is opened inside the third fixed block 81, the connecting plate 84 is slidably connected to the inside of the second sliding groove 86, and the other end of the second spring 85 is fixedly connected to the inside of the second sliding groove 86;

[0060] In this embodiment: after the length of the extension block 71 is determined, in order to ensure that the clamping block 82 can clamp gears of various sizes, the clamping block 82 is connected to the connecting plate 84 through the connecting rod 83, and the connecting plate 84 slides in the second sliding groove 86 inside the third fixed block 81, thereby further providing adjustable space for the overall length of the locking mechanism 6, and the second spring 85 cooperates with the second sliding groove 86 to provide secondary adjustment space for the position of the clamping block 82, thereby improving the clamping efficiency of the clamping block 82 for gears of various sizes.

[0061] like Figure 11 As shown, the rotating mechanism 9 includes a fourth fixing block 91, which is fixedly mounted on the surface of the third fixing block 81. A latch 92 is movably inserted into the fourth fixing block 91. A plurality of insertion holes 93 are formed on the end surface of the extension block 71. The insertion holes 93 are distributed in a semicircular shape. The latch 92 is movably inserted into the insertion holes 93.

[0062] In this embodiment: to ensure that the clamping block 82 can be stably inserted between two adjacent teeth on the gear surface, the angle of the clamping block 82 can be adjusted when the teeth of the clamping block 82 are on the same horizontal line, and the third fixing block 81 is rotated as a whole. At this time, the fourth fixing block 91 rotates accordingly. After the position of the clamping block 82 is determined, the pin 92 is inserted into the corresponding socket 93 to fix the position of the third fixing block 81, thereby ensuring that the clamping block 82 can be stably inserted between two adjacent teeth on the gear surface.

[0063] like Figure 11 As shown, an arcuate groove 98 is formed on the surface of the third fixed block 81, a docking block 94 is fixedly installed inside the arcuate groove 98, a rotating shaft 95 is fixedly installed inside the docking block 94, a docking hole 96 is formed at the end of the extension block 71, the docking block 94 is rotatably connected inside the docking hole 96, a rotating shaft groove 97 is formed at the end of the extension block 71, the rotating shaft 95 is rotatably connected inside the rotating shaft groove 97, and the end of the extension block 71 is rotatably connected inside the arcuate groove 98;

[0064] In this embodiment: the arc groove 98 provides space for the rotation of the third fixed block 81, and the docking block 94 cooperates with the extension block 71 through the connection of the rotating shaft 95 to achieve rotation. After the length of the extension block 71 is determined, the angle of the clamping block 82 can be adjusted again as needed, so as to be suitable for clamping gears of different sizes.

[0065] The working principle of this embodiment is as follows: first, the expansion mechanism 3 is placed in the middle of the gear, the electric telescopic rod 32 is started, and the first fixing block 33 at the end of the electric telescopic rod 32 moves downward, thereby causing the second bracket 35 to move downward, and the angle between the first bracket 34 and the second bracket 35 becomes smaller and the hinge of the first bracket 34 and the second bracket 35 extends outward, and the distance between the hinge and the electric telescopic rod 32 becomes longer, until the hinge of the first bracket 34 and the second bracket 35 fits the inner wall of the gear to fix the gear for the first time, and the ends of the first bracket 34 and the second bracket 35 are provided with protrusions 36 to increase the friction with the inner wall of the gear, and then the motor 41 in the driving mechanism 4 is started, and the transmission rod 42 rotates, and through the meshing action of the internal thread 37 and the external thread 43, the expansion mechanism 3 moves downward while driving the gear to contact the surface of the placement table 2 and exerting downward pulling force on the gear. When the transmission rod 42 rotates, the first bevel gear 44 and the second bevel gear When the gear 52 is engaged, the three sets of rotating brackets 51 rotate at the same time, and the driving sprocket 53 at the other end of the rotating bracket 51 rotates accordingly. The meshing relationship between the chain 56, the driving sprocket 53 and the driven sprocket 55 enables the rotating bracket 51 to drive the threaded rod 54 to rotate when it rotates. When the threaded rod 54 rotates, it drives the locking mechanism 6 to move toward the middle of the placement table 2 to lock the gear on the surface of the placement table 2 again. When it is necessary to adjust the length of the locking mechanism 6 according to gears of different sizes, the positioning rod 64 is pulled out. At this time, the positioning rod 64 is retracted into the positioning groove 65, the positioning ring 66 squeezes the first spring 67, and after the extension block 71 is inserted into the telescopic groove 63 to determine the length, the positioning rod 64 is released. Under the reset action of the first spring 67, the positioning ring 66 is squeezed to drive the positioning rod 64 to insert into the corresponding positioning hole 72, thereby fixing the position of the extension block 71, so that the locking mechanism 6 can clamp the gear as required.

[0066] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A gear processing positioning device, comprising a base (1), characterized in that: A placement platform (2) is fixedly mounted on the surface of the base (1); a through slot (21) is provided inside the base (1) and the placement platform (2); and a support mechanism (3) is slidably connected inside the through slot (21); A driving mechanism (4) for driving the spreading mechanism (3) to move downward is fixedly installed inside the base (1); three groups of linkage mechanisms (5) are provided on the surface of the placement table (2); three groups of locking mechanisms (6) are slidably connected inside the placement table (2); the linkage mechanisms (5) are used to drive the locking mechanisms (6) to move; the locking mechanisms (6) include a moving block (61); and a telescopic mechanism (7) for adjusting the length of the locking mechanism (6) is provided on the surface of the moving block (61); The front end of the locking mechanism (6) is provided with a locking mechanism (8) for limiting the position of the gear, and the connection between the telescopic mechanism (7) and the locking mechanism (8) is provided with a rotating mechanism (9) for adjusting the angle of the locking mechanism (8); The expansion mechanism (3) comprises a support block (31), an electric telescopic rod (32) is fixedly mounted on the surface of the support block (31), a first fixed block (33) is fixedly mounted on the end of the electric telescopic rod (32), three groups of first brackets (34) are hingedly connected to the surface of the support block (31), a second bracket (35) is hingedly connected to the surface of the first fixed block (33), one end of the first bracket (34) is hingedly connected to one end of the second bracket (35), and one end of the first bracket (34) and one end of the second bracket (35) are both fixedly mounted with a plurality of protrusions ( 36), an internal thread (37) is provided inside the support block (31), a symmetrical auxiliary block (38) is fixedly installed on the surface of the support block (31), a symmetrical guide rod (39) is fixedly installed inside the through groove (21), the auxiliary block (38) is slidably connected to the surface of the guide rod (39), the driving mechanism (4) includes a motor (41), the output end of the motor (41) is transmission-connected to a transmission rod (42), an end surface of the transmission rod (42) is provided with an external thread (43), and the external thread (43) is engaged with the internal thread (37); The linkage mechanism (5) comprises three rotating brackets (51), one end of each of the three rotating brackets (51) is fixedly mounted with a second bevel gear (52), a surface of the transmission rod (42) is fixedly mounted with a first bevel gear (44), the first bevel gear (44) is respectively meshed with the three second bevel gears (52), a driving sprocket (53) is fixedly mounted on the other end of the rotating bracket (51), three threaded rods (54) are rotatably connected inside the placement table (2), a driven sprocket (55) is fixedly mounted at the end of each of the threaded rods (54), and a chain (56) is meshed between the surfaces of the driving sprocket (53) and the driven sprocket (55); The surface of the placement table (2) is provided with three first sliding grooves (57), the three threaded rods (54) are all rotatably connected inside the three first sliding grooves (57), the three groups of locking mechanisms (6) are slidably connected inside the first sliding grooves (57), and the three moving blocks (61) are slidably connected inside the three first sliding grooves (57); A second fixed block (62) is fixedly mounted on the surface of the movable block (61), a telescopic slot (63) is provided inside the second fixed block (62), and the telescopic mechanism (7) includes an extension block (71), and the extension block (71) is slidably connected inside the telescopic slot (63); A symmetrical positioning rod (64) is slidably connected inside the telescopic groove (63), a plurality of positioning holes (72) are opened on the surface of the extension block (71), and the positioning rod (64) is movably inserted into the positioning holes (72); A symmetrical positioning groove (65) is provided inside the second fixed block (62), the positioning rod (64) is slidably connected inside the positioning groove (65), a positioning ring (66) is slidably connected inside the positioning groove (65), the positioning ring (66) is fixedly connected to the surface of the positioning rod (64), a first spring (67) is fixedly installed on the surface of the positioning ring (66), the other end of the first spring (67) is fixedly connected to the inside of the positioning groove (65), and the positioning rod (64) passes through the inside of the first spring (67).

2. A gear processing positioning device according to claim 1, characterized in that: The locking mechanism (8) includes a third fixed block (81), an end portion of the extension block (71) is hinged to the inside of the third fixed block (81), a clamping block (82) is slidably connected to the inside of the third fixed block (81), a connecting rod (83) is fixedly installed on the surface of the clamping block (82), a connecting plate (84) is fixedly installed on the end portion of the connecting rod (83), a second spring (85) is fixedly installed on one side of the connecting plate (84), a second slide groove (86) is opened inside the third fixed block (81), the connecting plate (84) is slidably connected to the inside of the second slide groove (86), and the other end of the second spring (85) is fixedly connected to the inside of the second slide groove (86).

3. A gear processing positioning device according to claim 2, characterized in that: The rotating mechanism (9) includes a fourth fixed block (91), the fourth fixed block (91) is fixedly mounted on the surface of the third fixed block (81), a latch (92) is movably inserted into the interior of the fourth fixed block (91), a plurality of insertion holes (93) are provided on the end surface of the extension block (71), the insertion holes (93) are distributed in a semicircular shape, and the latch (92) is movably inserted into the interior of the insertion holes (93).

4. A gear processing positioning device according to claim 3, characterized in that: The surface of the third fixed block (81) is provided with an arc-shaped groove (98), a docking block (94) is fixedly installed inside the arc-shaped groove (98), a rotating shaft (95) is fixedly installed inside the docking block (94), a docking hole (96) is provided at the end of the extension block (71), the docking block (94) is rotatably connected inside the docking hole (96), a rotating shaft groove (97) is provided at the end of the extension block (71), the rotating shaft (95) is rotatably connected inside the rotating shaft groove (97), and the end of the extension block (71) is rotatably connected inside the arc-shaped groove (98).

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