Positioning device for machining center hole of precision forging bevel gear

Abstract

The invention relates to a positioning device for machining a center hole of a precision forging bevel gear, and relates to the technical field of machining positioning. The machining device comprises a working frame, a machining platform and a plurality of positioning rods, the machining platform is arranged on the working frame, the positioning rods are connected with a supporting frame through moving assemblies, the positioning rods are evenly distributed in the circumferential direction of the supporting platform, and the center of a pattern defined by the positioning rods is located on the central axis of the machining platform. The moving assembly can drive the multiple positioning rods to move in the direction close to or away from the machining platform at the same time, and when the bevel gear is placed on the machining platform, the inner walls of the multiple positioning rods make contact with the bevel gear and are used for conducting center positioning on the bevel gear on the machining platform. The device has the effects that the center position of the bevel gear can be quickly and accurately found, and the machining precision is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of machining positioning, in particular to a positioning device for machining the center hole of a precision forged bevel gear. BACKGROUND

[0002] Precision forged bevel gears play an important role in the field of mechanical transmission. With the continuous progress of industrial technology, the machining precision and quality requirements of precision forged bevel gears are increasingly improved. The machining precision of the center hole of the precision forged bevel gear directly affects the matching precision and transmission efficiency with other components, so in the entire mechanical manufacturing industry chain, it is particularly important to improve the accuracy of machining the center hole of the precision forged bevel gear. Accurate center hole machining not only improves the performance of individual gears, but also enhances the stability and reliability of the entire mechanical system, which is of great significance to improving product quality and reducing production cost.

[0003] In the prior art, for the positioning of the center hole machining of the precision forged bevel gear, some traditional methods are often used. One common practice is to use a simple clamp to fix the bevel gear, and then determine the center position by manual measurement and adjustment. This method relies on the experience and skills of workers, and requires workers to spend a lot of time operating, which is inconvenient to operate, and needs to be improved. SUMMARY

[0004] In order to improve the problem of low machining precision caused by the inconvenience of manually determining the center position of the bevel gear, the present application provides a positioning device for machining the center hole of a precision forged bevel gear.

[0005] The positioning device for machining the center hole of a precision forged bevel gear provided by the present application adopts the following technical solution: A positioning device for machining the center hole of a precision forged bevel gear, comprising a workbench, a machining platform and a plurality of positioning rods, the machining platform is arranged on the workbench, the positioning rods are connected with the support frame through a moving assembly, the positioning rods are evenly arranged along the circumference of the support platform, the center of the figure surrounded by the positioning rods is on the central axis of the machining platform, the moving assembly can drive the positioning rods to move towards or away from the machining platform at the same time, when the bevel gear is placed on the machining platform, the inner walls of the positioning rods are in contact with the bevel gear, which is used to center the bevel gear on the machining platform.

[0006] By adopting the technical scheme, when in use, the bevel gear is placed upside down on the machining platform, at this time, the bevel gear is located between the positioning rods, then the moving assembly is started to drive the positioning rods to move towards the center of the machining platform at the same time until all the positioning rods abut against the circumferential side of the bevel gear, so that the bevel gear is an incircle of the figure surrounded by the positioning rods, thereby the bevel gear is coaxial with the machining platform, the center positioning of the bevel gear on the machining platform is realized, the center position of the bevel gear can be quickly and accurately found, and the machining precision of the center hole of the bevel gear is improved.

[0007] Optionally, the moving assembly comprises a driving member and a plurality of connecting blocks, the driving member is arranged on the machining platform, the driving member is connected with the connecting blocks, and is used for driving the connecting blocks to move towards or away from each other, the connecting blocks are in one-to-one correspondence with the positioning rods, the connecting blocks are provided with slots, one end of the positioning rod is fixed on the corresponding connecting block, and the other end penetrates through the slot on the adjacent connecting block, and the positioning rod can move in the slot.

[0008] By adopting the technical scheme, the driving member is started to drive the connecting blocks to move towards or away from the machining platform at the same time, that is, the vertices of the figure surrounded by the positioning rods move synchronously, so that the figure surrounded changes, thereby the positioning rods move in the slots on the adjacent connecting blocks to meet the distance between the adjacent connecting blocks, so that the figure surrounded is always a similar figure, that is, the central axis does not change. Therefore, the center positioning of the bevel gears with different diameters can be realized.

[0009] Optionally, a plurality of guide rods are arranged on the working frame, the guide rods are radially arranged with the center of the machining platform as the center, one end of the guide rod is fixed on the supporting platform, the other end is fixed on the working frame, the connecting blocks are in one-to-one correspondence with the guide rods, the connecting blocks are slidingly connected on the corresponding guide rods, and the driving member is used for driving the connecting blocks to move along the length direction of the guide rod.

[0010] By adopting the technical scheme, when the driving member drives the connecting blocks to move, the connecting blocks move on the corresponding guide rods, the guide rods play a role in limiting the movement direction, so that Optionally, the driving member comprises a moving rod, a moving block and a plurality of connecting rods, the moving rod is vertically arranged, the top end of the moving rod is rotationally connected at the center of the machining platform, the moving block is sleeved on the moving rod and is threadedly connected with the moving rod, when the moving rod rotates, the moving block is driven to move up and down, the connecting rods are in one-to-one correspondence with the connecting blocks, one end of the connecting rod is hingedly connected on the moving block, and the other end is hingedly connected on the corresponding connecting block.

[0011] By adopting the technical scheme, when the positioning rods need to be moved, the moving rod is driven to rotate, the moving block is connected with the connecting block through the connecting rod, the connecting block cannot move around the moving rod under the limitation of the guide rod, so that the moving block cannot rotate with the moving rod, and then the moving block moves along the length direction of the moving rod, at this time, the distance between the moving block and the machining platform changes, the length of the connecting rod is fixed, so that the distance between the other end of the connecting rod and the machining platform changes synchronously, that is, the connecting rod rotates, the connecting block moves along the guide rod, and synchronous movement of the positioning rods is realized.

[0012] Optionally, a linkage member is arranged between adjacent connecting rods, the linkage member comprises a linkage rod and a driven rod, one end of the linkage rod is hinged to one of the connecting rods, the other end of the linkage rod is hinged to one end of the driven rod, and the other end of the driven rod away from the linkage rod is hinged to the other connecting rod.

[0013] By adopting the technical scheme, when the connecting rod rotates, the linkage rod and the driven rod rotate at the same time, drive the adjacent connecting rod to move, enhance the linkage between the connecting rods, and ensure the synchronization of movement of the connecting blocks and the positioning rods.

[0014] Optionally, a plurality of positioning blocks are arranged on the machining platform, the positioning blocks can be inserted into the tooth grooves of the bevel gears, electromagnets are fixed on the positioning blocks, adjacent electromagnets can be attracted to each other, when adjacent positioning blocks are respectively inserted into adjacent tooth grooves of the bevel gears, the electromagnets on the two positioning blocks are attracted to each other, and the adjacent positioning blocks clamp one tooth of the bevel gear.

[0015] By adopting the technical scheme, when adjacent positioning blocks are respectively inserted into adjacent tooth grooves of the bevel gears, the electromagnets on the two positioning blocks are attracted to each other, the adjacent positioning blocks clamp one tooth of the bevel gear, the bevel gear is not easy to be separated from the machining platform, and the stability of the bevel gear placed on the machining platform is improved.

[0016] Optionally, a plurality of accommodating grooves are formed in the top wall of the machining platform, two positioning blocks are inserted into each of the accommodating grooves, an arc rod is arranged in the accommodating groove, the arc rod penetrates the positioning blocks, and the positioning blocks can move on the arc rod.

[0017] By adopting the technical scheme, the accommodating groove provides a space for the positioning block to be placed and moved, the arc rod provides a guiding action for the movement of the positioning block, the displacement of the positioning block is facilitated, different bevel gears with different numbers of teeth can be clamped and limited, and the applicability is better.

[0018] Optionally, a fixing assembly is arranged in the machining platform, the fixing assembly is connected with the positioning block, and is used for limiting the movement of the positioning block on the arc rod.

[0019] By adopting the above technical scheme, when the positioning block is inserted into the tooth groove of the bevel gear, the fixed assembly is started, the positioning block is fixed on the arc rod, and the inner wall of the tooth groove of the bevel gear abuts against the positioning block, so that the bevel gear cannot move, the fixation of the bevel gear on the machining platform is realized, the deviation during the machining of the center hole of the bevel gear is avoided, and the machining precision is improved.

[0020] Optionally, the fixed assembly comprises a plurality of gears and a plurality of racks, the plurality of gears correspond to the arc rods one by one, the two electromagnets connected with the arc rods are slidingly connected to the corresponding gears, the plurality of racks correspond to the gears one by one, the center of the machining platform is provided with a sliding piece, the sliding piece is connected with the racks, and the sliding piece is used to drive the plurality of racks to simultaneously move close to or away from the corresponding gears, and the racks can be engaged with the gears.

[0021] By adopting the above technical scheme, when the positioning block moves, the corresponding gear is driven to move around the circumference, when the positioning block is inserted into the tooth groove of the bevel gear, the sliding piece is started, the rack is driven to move close to the gear, and the rack is engaged with the gear until the side wall of the tooth on the gear abuts against the side wall of the tooth on the rack, so that the gear cannot move, and the positioning block is fixed on the guide rod.

[0022] Optionally, the sliding piece comprises a sliding motor and a plurality of sliding rods, the sliding motor is arranged at the center of the machining platform, the plurality of sliding rods correspond to the racks one by one, one end of the sliding rod is hinged, and the other end is hinged to the output shaft of the sliding motor.

[0023] By adopting the above technical scheme, the sliding motor is started, the plurality of sliding rods are driven to rotate synchronously, so that the plurality of racks simultaneously move close to or away from the corresponding gears, so as to simultaneously limit or release all the gears, and the synergy is better.

[0024] In summary, the present application has at least one of the following beneficial effects: 1. When used, the bevel gear is placed upside down on the machining platform, at this time, the bevel gear is located between the plurality of positioning rods, then the moving assembly is started, the plurality of positioning rods are driven to move close to the center of the machining platform at the same time, until all the positioning rods abut against the circumferential side of the bevel gear, so that the bevel gear is the inscribed circle of the figure surrounded by the plurality of positioning rods, so that the bevel gear is coaxial with the machining platform, the center positioning of the bevel gear on the machining platform is realized, the center position of the bevel gear can be quickly and accurately found, and the machining precision of the center hole of the bevel gear is improved; 2、When the adjacent positioning blocks are respectively inserted into the adjacent tooth grooves of the bevel gear, the electromagnets on the two positioning blocks are attracted to each other, so that the adjacent positioning blocks clamp a tooth of the bevel gear, so that the bevel gear is not easy to be separated from the machining platform, the stability of the bevel gear on the machining platform is improved, and the machining precision is improved. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a structure schematic view of the positioning device for machining the center hole of the precision forged bevel gear; Figure 2 It is a structure schematic view on the machining platform; Figure 3 It is a structure schematic view in the machining platform.

[0026] In the figure: 10, workbench; 11, guide rod; 20, machining platform; 21, containing groove; 30, positioning rod; 40, moving assembly; 41, driving piece; 411, moving rod; 412, moving block; 413, connecting rod; 42, connecting block; 421, insertion slot; 50, linkage; 51, linkage rod; 52, driven rod; 60, arc rod; 70, positioning block; 71, electromagnet; 80, fixing assembly; 81, gear; 82, rack; 90, sliding piece; 91, sliding motor; 92, sliding rod. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings Figures 1-3 The application will be further described in detail.

[0028] The embodiment of the application discloses a positioning device for machining the center hole of a precision forged bevel gear 81. Referring to Figure 1 and Figure 2 The positioning device for machining the center hole of the precision forged bevel gear 81 comprises a workbench 10, a machining platform 20 and a plurality of positioning rods 30, wherein the workbench 10 serves as a support for the whole device, the machining platform 20 is arranged on the workbench 10 and serves as a basic platform for placing the bevel gear 81 for machining. The plurality of positioning rods 30 are connected with the support frame through a moving assembly 40 and are uniformly arranged along the circumference of the support platform. The center of the figure surrounded by the plurality of positioning rods 30 is on the central axis of the machining platform 20, and this arrangement makes the positioning more accurate. The moving assembly 40 can drive the plurality of positioning rods 30 to move towards or away from the machining platform 20 at the same time, when the bevel gear 81 is placed on the machining platform 20, the inner walls of the plurality of positioning rods 30 are in contact with the bevel gear 81, so that the bevel gear 81 is an inscribed circle of the figure surrounded by the plurality of positioning rods 30, thereby centering the bevel gear 81 on the machining platform 20. The advantage of this is that the center position of the bevel gear 81 can be quickly and accurately found, and the influence of human factors and poor universality in the traditional positioning mode is avoided, so that the positioning precision and efficiency are greatly improved.

[0029] With reference to Figure 1 Specifically, the moving assembly 40 comprises a driving member 41 and a plurality of connecting blocks 42. The driving member 41 is arranged on the machining platform 20 and is connected with the connecting blocks 42, and functions to drive the connecting blocks 42 to move closer to or away from each other. The connecting blocks 42 correspond to the positioning rods 30 one by one, and the connecting blocks 42 are provided with slots 421. One end of each positioning rod 30 is fixed on the corresponding connecting block 42, and the other end penetrates through the slot 421 of the adjacent connecting block 42, and the positioning rod 30 is movable in the slot 421.

[0030] With reference to Figure 1 The driving member 41 comprises a moving rod 411, a moving block 412 and a plurality of connecting rods 413. The moving rod 411 is arranged vertically, and the top end thereof is rotatably connected at the center of the machining platform 20. The moving block 412 is sleeved on the moving rod 411 and is threadedly connected with the moving rod 411. When the moving rod 411 rotates, the moving block 412 can be driven to move up and down. The connecting rods 413 correspond to the connecting blocks 42 one by one, and one end of each connecting rod 413 is hingedly connected to the moving block 412, and the other end is hingedly connected to the corresponding connecting block 42. The moving rod 411 can be driven to rotate by a motor, such as a stepping motor, which can accurately control the rotating angle.

[0031] With reference to Figure 1 The working stand 10 is provided with a plurality of guide rods 11, which are arranged radially with the center of the machining platform 20 as the center, and one end of each guide rod 11 is fixed with the support platform, and the other end is fixed with the working stand 10. The connecting blocks 42 correspond to the guide rods 11 one by one, and the connecting blocks 42 are slidingly connected to the corresponding guide rods 11. The driving member 41 is used to drive the connecting blocks 42 to move along the length direction of the guide rods 11. The guide rods 11 function to guide the movement of the connecting blocks 42 and ensure the straightness of the movement.

[0032] With reference to Figure 1 A linkage member 50 is arranged between the adjacent connecting rods 413, and the linkage member 50 comprises a linkage rod 51 and a driven rod 52. One end of the linkage rod 51 is hingedly connected with one of the connecting rods 413, and the other end is hingedly connected with one end of the driven rod 52. The end of the driven rod 52 away from the linkage rod 51 is hingedly connected with the other connecting rod 413. The linkage member 50 functions to enhance the linkage between the connecting rods 413 and ensure the synchronization of the movement of the connecting blocks 42 and the positioning rods 30.

[0033] With reference to Figure 1 and Figure 2The machining platform 20 is provided with a plurality of positioning blocks 70, the positioning blocks 70 can be inserted into the tooth grooves of the bevel gears 81, the positioning blocks 70 are fixed with electromagnets 71, and adjacent electromagnets 71 can be attracted to each other. When adjacent positioning blocks 70 are respectively inserted into the tooth grooves of adjacent bevel gears 81, the electromagnets 71 on the two positioning blocks 70 are attracted to each other, so that the adjacent positioning blocks 70 clamp a tooth of the bevel gear 81. The power of the electromagnets 71 can be selected according to the size of the bevel gear 81.

[0034] With reference to Figure 2 and Figure 3 The top wall of the machining platform 20 is provided with a plurality of accommodating grooves 21, two positioning blocks 70 are inserted into each accommodating groove 21, an arc rod 60 is arranged in the accommodating groove 21, the arc rod 60 penetrates the positioning blocks 70, and the positioning blocks 70 can move on the arc rod 60. The accommodating groove 21 provides a space for the positioning blocks 70 to be placed and moved, and the shape of the arc rod 60 is matched with the tooth shape of the bevel gear 81, so that the positioning blocks 70 can be moved to the appropriate position along the arc rod 60, and the bevel gears 81 with different numbers of teeth can be limited.

[0035] With reference to Figure 2 and Figure 3 The machining platform 20 is provided with a fixing assembly 80 connected with the positioning blocks 70, for limiting the movement of the positioning blocks 70 on the arc rod 60. The fixing assembly 80 includes a plurality of gears 81 and a plurality of racks 82, the plurality of gears 81 correspond to the arc rods 60 one by one, the two electromagnets 71 connected with the arc rod 60 are slidably connected to the corresponding gears 81, and the plurality of racks 82 correspond to the gears 81 one by one. The center of the machining platform 20 is provided with a sliding piece 90 connected with the racks 82, the sliding piece 90 is used to drive the plurality of racks 82 to move close to or away from the corresponding gears 81, and the racks 82 can be engaged with the gears 81.

[0036] When the positioning blocks 70 move, the corresponding gears 81 move around the circumference, when the positioning blocks 70 are inserted into the tooth grooves of the bevel gears 81, the racks 82 are driven to move close to the gears 81 until the racks 82 are engaged with the gears 81, the side walls of the teeth on the gears 81 and the side walls of the teeth on the racks 82 abut, so that the gears 81 cannot move, and the positioning blocks 70 are fixed on the guide rod 11.

[0037] With reference to Figure 2 and Figure 3The sliding member 90 comprises a sliding motor 91 and a plurality of sliding rods 92, the sliding motor 91 is arranged at the center of the machining platform 20, the plurality of sliding rods 92 correspond to the racks 82 one by one, one end of the sliding rod 92 is hinged, and the other end is hinged with the output shaft of the sliding motor 91. Start the sliding motor 91, drive the plurality of sliding rods 92 to rotate synchronously, so that the plurality of racks 82 are close to or away from the corresponding gear 81 at the same time, so as to realize the simultaneous restriction or release of all the gears 81, and the cooperation is better.

[0038] The implementation principle of the positioning device for machining the center hole of the precision forged bevel gear 81 is as follows: when in use, the bevel gear 81 is placed upside down on the machining platform 20, at this time, the bevel gear 81 is located between the plurality of positioning rods 30, then the moving assembly 40 is started, the plurality of positioning rods 30 are driven to move towards the center of the machining platform 20 at the same time, until all the positioning rods 30 abut against the circumferential side of the bevel gear 81, so that the bevel gear 81 is the inscribed circle of the figure surrounded by the plurality of positioning rods 30, so that the bevel gear 81 is coaxial with the machining platform 20, the center positioning of the bevel gear 81 on the machining platform 20 is realized, the center position of the bevel gear 81 can be quickly and accurately found, and the machining precision of the center hole of the bevel gear 81 is improved.

[0039] The above are the preferred embodiments of the present application, and do not limit the protection scope of the present application, therefore: all equivalent changes made according to the structure, shape and principle of the present application should be covered in the protection scope of the present application.

Claims

1. A positioning device for machining a center hole of a closed-die drop-forged bevel gear (81), characterized by, The utility model provides a kind of centering device for conical gear, including workbench (10), processing platform (20) and several positioning rods (30), the processing platform (20) is located on the workbench (10), the positioning rod (30) is connected with support frame by moving assembly (40), several positioning rods (30) are evenly arranged along the circumference of support platform, the center of the figure surrounded by several positioning rods (30) is on the central axis of processing platform (20), the moving assembly (40) can drive several positioning rods (30) to move simultaneously towards the direction of approaching or away from processing platform (20), when bevel gear (81) is placed on processing platform (20), the inner wall of several positioning rods (30) is contacted with bevel gear (81), for center positioning of bevel gear (81) on processing platform (20).

2. The positioning device for machining the center hole of a closed-die drop gear (81) according to claim 1, characterized in that, The moving assembly (40) includes driving part (41) and several connecting blocks (42), the driving part (41) is located on the processing platform (20), the driving part (41) is connected with connecting block (42), for driving several connecting blocks (42) to be close to each other or away from each other, several connecting blocks (42) correspond to positioning rod (30) one by one, the connecting block (42) is equipped with slot (421), one end of the positioning rod (30) is fixed on the corresponding connecting block (42), the other end is threaded the slot (421) on adjacent connecting block (42), and the positioning rod (30) can move in the slot (421).

3. The positioning device for machining the center hole of a closed-die drop gear (81) according to claim 2, wherein The workbench (10) is equipped with several guide rods (11), and several guide rods (11) are radially arranged with the center of processing platform (20) as the center, one end of the guide rod (11) is fixed with the support platform, the other end is fixed with the workbench (10), several connecting blocks (42) correspond to guide rods (11) one by one, the connecting block (42) is slidably connected on the corresponding guide rod (11), and the driving part (41) is used to drive the connecting block (42) to move along the length direction of guide rod (11).

4. The positioning device for machining the center hole of a closed-die drop gear (81) according to claim 2, wherein The driving part (41) includes moving rod (411), moving block (412) and several connecting rods (413), the moving rod (411) is vertically arranged, the top end of the moving rod (411) is rotationally connected at the center of the processing platform (20), the moving block (412) is sleeved on the moving rod (411) and is threadedly connected with the moving rod (411), when the moving rod (411) rotates, the moving block (412) is driven to move up and down, several connecting rods (413) correspond to connecting blocks (42) one by one, one end of the connecting rod (413) is hinged on the moving block (412), and the other end is hinged on the corresponding connecting block (42).

5. The positioning device for machining the center hole of a closed-die drop gear (81) according to claim 4, wherein Linkage members (50) are arranged between adjacent connecting rods (413), and each linkage member (50) comprises a linkage rod (51) and a driven rod (52), one end of the linkage rod (51) is hinged to one of the connecting rods (413), the other end is hinged to one end of the driven rod (52), and the end of the driven rod (52) away from the linkage rod (51) is hinged to the other connecting rod (413).

6. The positioning device for finish machining of the center hole of a drop-forged bevel gear (81) according to claim 1, characterized in that, A plurality of positioning blocks (70) are arranged on the processing platform (20), the positioning blocks (70) can be inserted into the tooth grooves of the bevel gears (81), and electromagnets (71) are fixed on the positioning blocks (70). Adjacent electromagnets (71) can be attracted to each other. When adjacent positioning blocks (70) are inserted into adjacent tooth grooves of the bevel gears (81), the electromagnets (71) on the two positioning blocks (70) are attracted to each other, so that the adjacent positioning blocks (70) clamp one tooth of the bevel gear (81).

7. The positioning device for machining the center hole of a closed-die drop gear (81) according to claim 6, wherein A plurality of accommodating grooves (21) are formed in the top wall of the processing platform (20), two positioning blocks (70) are inserted into each accommodating groove (21), an arc rod (60) is arranged in the accommodating groove (21), the arc rod (60) penetrates the positioning blocks (70), and the positioning blocks (70) can move on the arc rod (60).

8. The positioning device for machining the center hole of a closed-die drop gear (81) according to claim 7, wherein A fixing assembly (80) is arranged in the processing platform (20), the fixing assembly (80) is connected with the positioning blocks (70), and is used for limiting the movement of the positioning blocks (70) on the arc rod (60).

9. The positioning device for machining the center hole of a closed-die drop gear (81) according to claim 8, wherein The fixing assembly (80) comprises a plurality of gears (81) and a plurality of racks (82), the plurality of gears (81) correspond to the arc rods (60) in a one-to-one manner, the two electromagnets (71) connected with the arc rod (60) are slidingly connected to the corresponding gears (81), the plurality of racks (82) correspond to the gears (81) in a one-to-one manner, a sliding member (90) is arranged at the center of the processing platform (20), the sliding member (90) is connected with the racks (82), and the sliding member (90) is used for driving the plurality of racks (82) to move towards or away from the corresponding gears (81) at the same time. The racks (82) can be engaged with the gears (81).

10. The positioning device for machining the center hole of a closed-die drop gear (81) according to claim 9, wherein The sliding member (90) comprises a sliding motor (91) and a plurality of sliding rods (92), the sliding motor (91) is arranged at the center of the processing platform (20), the plurality of sliding rods (92) correspond to the racks (82) in a one-to-one manner, one end of each sliding rod (92) is hinged, and the other end is hinged to the output shaft of the sliding motor (91).

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