Grinding equipment for spline flange of automobile transmission shaft

Abstract

The invention discloses grinding equipment for an automobile transmission shaft spline flange. The grinding equipment comprises a center shaft arranged at the end of a power rod, grinding wheel blocks which are symmetrically arranged are fixedly arranged on the center shaft, opening and closing grinding wheels are rotationally arranged on the grinding wheel blocks, the center shaft is movably sleeved with an embedding block, and a fan inclined face and a fan plane are arranged on the end face of the embedding block. According to the grinding equipment for the spline flange of the automobile transmission shaft, the two grinding wheel blocks are away from each other in parallel by the gradually increased inclination angles of the fan slopes, so that the two opening and closing grinding wheels are opened in parallel, and the contact area between the circular side walls of the opening and closing grinding wheels and the inner wall of a spline groove is increased; and when the fan planes start to abut against each other, the two opening and closing grinding wheels are opened in a table shape and are attached to the side wall of the table-shaped spline groove, the opening and closing grinding wheels suitable for grinding the inner walls of different spline grooves are obtained, and the spline shaft machining efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of transmission shaft processing, in particular to a grinding device for a spline flange of an automobile transmission shaft. Background Art

[0002] The spline hole processing of the transmission shaft is a kind of precision processing. Usually, a long rod with a rotating grinding wheel is inserted into the spline hole for grinding. It is mainly achieved using a high-precision grinder to effectively remove the processing burrs and rough protrusions in the spline hole.

[0003] According to the publication (announcement) number: CN112809471B, the publication (announcement) date: 2022-11-15, a method for high-finish grinding of straight inner holes is disclosed.

[0004] In the prior art including the above-mentioned patents, the spline grooves arranged circumferentially in the spline hole are usually rectangular or trapezoidal. In order to allow the grinding wheel to have sufficient space for movement and ensure the passage of grinding sparks, the thickness of the grinding wheel is generally smaller than the width of the spline groove. However, during the grinding process of the side walls of the spline groove, it is necessary to use two methods: the side of the grinding wheel actively fits the side wall of the spline groove, or the grinder fixture rotates the spline shaft to make the side wall of the spline groove actively fit the side of the grinding wheel. The short-stroke movement generated in this process requires an additional power stroke for the grinding machine equipment, which undoubtedly increases the difficulty of grinding machine calibration. The trajectory of the grinding wheel or spline shaft after movement is arc-shaped, which cannot ensure the close fit between the inner side wall of the groove and the side of the grinding wheel, making the calibration of the grinder more complicated and affecting the grinding effect. Summary of the invention

[0005] The purpose of the present invention is to provide a grinding device for the spline flange of an automobile transmission shaft, aiming to solve the above-mentioned problems.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A grinding device for a spline flange of a vehicle transmission shaft comprises a grinding head provided with a power rod, and also comprises a central shaft provided at the end of the power rod, on which symmetrically arranged grinding wheel blocks are fixedly provided, and on which an opening and closing grinding wheel is rotated;

[0008] The movable sleeve on the central axis is provided with an engaging block, and the end surface of the engaging block is provided with a fan inclined surface and a fan flat surface, and the grinding wheel block can be switched between the fan inclined surface and the fan flat surface.

[0009] Preferably, an arc groove section is provided on the end surface of the grinding wheel block, and the arc groove section is divided into a first inclined groove and a second inclined groove according to the shape, the fan inclined surface is slidably matched with the first inclined groove, and the fan plane is slidably matched with the second inclined groove.

[0010] Preferably, it further comprises a belt arranged on the grinding head, and a transmission head driven by the belt is fixedly mounted on the opening and closing grinding wheel.

[0011] Preferably, symmetrically arranged sleeves are fixedly mounted on the engaging block, a plurality of clamping blocks are arranged on the opening and closing grinding wheel, and a clamping groove for being clamped and assembled by the clamping blocks is provided on the sleeve.

[0012] Preferably, the grinding wheel block is provided with a plurality of locking holes, and a locking block is movably provided on the central axis and is plugged into and matched with the locking holes to lock the grinding wheel block.

[0013] Preferably, the sleeve is provided with a plurality of sleeve holes, and the locking block is located in the sleeve holes and moves circumferentially.

[0014] Preferably, a guard strip is slidably provided on the transmission head, and a guard shield located outside the belt is fixedly mounted on the guard strip.

[0015] Preferably, a fixing piece for clamping the central axis is provided at the end of the power rod, and the guard strip in the axially movable state abuts against the fixing piece.

[0016] Preferably, it also includes an air pipe arranged between the two power rods, and the two shields in the deployed state divert the exhaust of the air pipe.

[0017] Preferably, the engaging block in the rotating state cooperates with the two unfolded shields to redirect the exhaust airflow.

[0018] In the above technical scheme, a grinding device for the spline flange of an automobile transmission shaft provided by the present invention has the following beneficial effects: the fan bevel is rotated by the engaging block to firstly contact the symmetrically arranged grinding wheel blocks, so that the two grinding wheel blocks are moved away from each other by the gradually increasing inclination angle of the fan bevel. At this time, the two opening and closing grinding wheels are in a parallel open state. On the one hand, the coverage area between the circular side wall of the opening and closing grinding wheel and the inner wall of the spline groove is expanded, and on the other hand, the side edge of the opening and closing grinding wheel is fitted with the side wall of the spline groove, which is used for high-efficiency grinding of the three walls of the rectangular spline groove. When the fan plane begins to contact the work, the two grinding wheel blocks are deflected from each other at a center point after being opened in parallel, so that the two opening and closing grinding wheels are in a trapezoidal open state, so that the side edge of the opening and closing grinding wheel can be fitted with the side wall of the trapezoidal spline groove, and an opening and closing grinding wheel suitable for grinding different inner walls of the spline groove is obtained. There is no need to add a fixture to the grinder or a program stroke of the grinding head, thereby improving the grinding effect of the grinder for processing the spline shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0020] Figure 1 A schematic diagram of a spline shaft and a grinding head equipped with an opening and closing grinding wheel to be ground provided in an embodiment of the present invention;

[0021] Figure 2 A schematic diagram of a grinding head equipped with an opening and closing grinding wheel provided in an embodiment of the present invention;

[0022] Figure 3 A schematic diagram of a half-opened and closed grinding wheel and a power rod from the left side upward view provided in an embodiment of the present invention;

[0023] Figure 4 A schematic diagram of a half-opened and closed grinding wheel and a power rod from a left side top view provided in an embodiment of the present invention;

[0024] Figure 5 An exploded schematic diagram of a half-open and closed grinding wheel and its internal parts from a left side perspective provided by an embodiment of the present invention;

[0025] Figure 6 An exploded schematic diagram of a half-open and closed grinding wheel and its internal parts from a front view provided by an embodiment of the present invention;

[0026] Figure 7 An exploded schematic diagram of a half-opened and closed grinding wheel and its internal parts from a top-down perspective on the right side provided by an embodiment of the present invention;

[0027] Figure 8 A schematic top view of a grinding wheel block inside a half-open and closed grinding wheel provided in an embodiment of the present invention;

[0028] Fig. 9 A schematic diagram of an extended internal groove section of a grinding wheel block provided in an embodiment of the present invention;

[0029] Fig.10 A schematic diagram of the cooperation of two grinding wheel blocks butting guide rods provided by an embodiment of the present invention;

[0030] Fig.11 A schematic diagram of the flow direction of incoming airflow in the deployed state of two shields provided in an embodiment of the present invention.

[0031] Description of reference numerals:

[0032] 1. Grinding head; 2. Power rod; 3. Opening and closing grinding wheel; 31. Transmission head; 32. Belt; 33. Guard strip; 34. Guard; 4. Grinding wheel block; 41. Arc groove section; 411. First inclined groove; 412. Flat groove; 413. Second inclined groove; 414. Third inclined groove; 5. Engraving block; 51. Scalloped surface; 52. Scalloped surface; 53. Sleeve; 54. Sleeve hole; 6. Center axis; 61. Locking block; 62. Locking hole; 7. Clamping block; 70. Naming hole; 71. Clamping groove; 8. Fixing piece; 9. Air pipe. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0034] like Figure 1-11 As shown, a grinding device for a spline flange of a vehicle transmission shaft comprises a grinding head 1 provided with a power rod 2, and also comprises a central shaft 6 provided at the end of the power rod 2, on which a symmetrically arranged grinding wheel block 4 is fixedly provided, and on which an opening and closing grinding wheel 3 is rotated;

[0035] The central shaft 6 is movably sleeved with an engaging block 5 , and the end surface of the engaging block 5 is provided with a fan slope 51 and a fan plane 52 . The grinding wheel block 4 can be switched between the fan slope 51 and the fan plane 52 .

[0036] Specifically, the grinding head 1 is installed on the tool changing device of the machine tool, and the symmetrically arranged power rod 2 is installed in the grinding head 1. The installation method of the power rod 2 and the grinding head 1 are both existing technologies and will not be described in detail here; the circular side walls and side edges of the opening and closing grinding wheel 3 are both grinding wheels in the existing technology and will not be described in detail here.

[0037] Furthermore, the center shaft 6 is fixed to the end of the power rod 2, and the end surface of the opening and closing grinding wheel 3 not used for grinding is provided with a circular groove for placing the grinding wheel block 4, and the end surface of the grinding wheel block 4 is flush with the end surface of the opening and closing grinding wheel 3, so that the two opening and closing grinding wheels 3 in the default state remain close together to ensure the normal grinding of the inner wall of the spline groove.

[0038] Furthermore, the fan plane 52 is the uncut portion of the cylindrical interlocking block 5, and the fan slope 51 is a fan-shaped slope formed by cutting, so that the fan-shaped slope can actively slide between the two grinding wheel blocks 4 to open the two opening and closing grinding wheels 3.

[0039] By rotating the engaging block 5, the fan bevel 51 first contacts the symmetrically arranged grinding wheel block 4, so that the two grinding wheel blocks 4 are moved away from each other by the gradually increasing inclination angle of the fan bevel 51. At this time, the two opening and closing grinding wheels 3 are in a parallel open state. On the one hand, the coverage area between the circular side wall of the opening and closing grinding wheel 3 and the inner wall of the spline groove is expanded, and on the other hand, the side edge of the opening and closing grinding wheel 3 is fitted with the side wall of the spline groove, which is used for efficient grinding of the three walls of the rectangular spline groove. When the fan plane 52 begins to contact the work, the two grinding wheel blocks 4 are deflected from each other at a center point after being opened in parallel, so that the two opening and closing grinding wheels 3 are in a trapezoidal open state, so that the side edge of the opening and closing grinding wheel 3 can fit the side wall of the trapezoidal spline groove, and the opening and closing grinding wheel 3 suitable for grinding different inner walls of the spline groove is obtained. There is no need to add a fixture to the grinder or a program stroke of the grinding head 1, thereby improving the grinding effect of the spline shaft processed by the grinder.

[0040] As an embodiment further provided by the present invention, an arc groove section 41 is opened on the end face of the grinding wheel block 4, and the arc groove section 41 is divided into a first inclined groove 411 and a second inclined groove 413 according to the shape, the fan inclined surface 51 is slidably matched with the first inclined groove 411, and the fan plane 52 is slidably matched with the second inclined groove 413.

[0041] Specifically, Figure 8 and Fig. 9 As shown, a flat groove 412 and a third inclined groove 414 are further provided between the first inclined groove 411 and the second inclined groove 413, and these four grooves form the entire annular arc groove segment 41. Fig. 9 The solid single arrow in the figure indicates the sliding direction of the fan slope 51 , that is, when the fan slope 51 with gradually increasing thickness acts on the first inclined grooves 411 with gradually decreasing spacing, the two first inclined grooves 411 will inevitably move away from each other, thereby achieving the purpose of opening the grinding wheel block 4 .

[0042] Furthermore, the fan plane 52 is in the flat groove 412 by default (the inner wall of the flat groove 412 is flush with the end face of the fan plane 52), and during the sliding fit between the fan inclined surface 51 and the first inclined groove 411, the fan plane 52 is always movable in the flat groove 412, so that the fan plane 52 does not interfere with the parallel opening of the two grinding wheel blocks 4.

[0043] Furthermore, Fig.10 As shown, two plug rods are fixedly installed on the end face of one of the grinding wheel blocks 4, and the end of one of the plug rods is a spherical block. A socket for the plug rod to slide is opened on the end face of the other grinding wheel block 4, and the socket port is enlarged so that the plug rod has sufficient space to move when the two grinding wheel blocks 4 are tilted away from each other. At the same time, the diameter of one of the sockets is larger than the other so that the socket can adapt to the sliding of the spherical block.

[0044] During the rotation of the engaging block 5, the fan bevel 51 actively slides between the two first bevel grooves 411, and gradually slides to the position where the distance between the two first bevel grooves 411 is reduced, and in this process, the surface of the fan bevel 51 fits with the surface of the first bevel groove 411, so that the two grinding wheel blocks 4 are forced to open in parallel, so that the two opening and closing grinding wheels 3 can adapt to the rectangular spline groove grinding; and when the fan plane 52 slides from the flat groove 412 into the second bevel groove 413, similarly, the fan plane 52 gradually slides to the position where the distance between the two second bevel grooves 413 is reduced, and at this time, the fan bevel 51 slides into The two grinding wheel blocks 4 are forced to open because the fan plane 52 is thicker than the fan slope 51, and a gap is gradually formed between the fan slope 51 and the flat groove 412, which cannot meet the fit. During the sliding of the fan plane 52, the flat groove 412 is driven to move closer to the fan slope 51 to fill this gap, so that the two grinding wheel blocks 4 are deflected and the two opening and closing grinding wheels 3 are opened in a table shape, which is used to adapt to the table-shaped spline groove grinding and improve the grinding effect of the opening and closing grinding wheels 3 on the inner wall of the spline shaft.

[0045] As another embodiment further provided by the present invention, it also includes a belt 32 arranged on the grinding head 1, and a transmission head 31 driven by the belt 32 is fixedly installed on the opening and closing grinding wheel 3.

[0046] Specifically, the original transmission head 31 is divided into two to drive the two opening and closing grinding wheels 3 to rotate, while the two belts 32 still use the same driving source, and the driving method of the belts 32 is the existing technology and will not be described here.

[0047] The driving source in the grinding head 1 rotates forward and reversely, and the two opening and closing grinding wheels 3 are driven to rotate forward and reverse via the belt 32, so that the opening and closing grinding wheels 3 can be conveniently used for grinding, and the spacing between the two opening and closing grinding wheels 3 can be adjusted to adapt to different spline groove grinding.

[0048] As another embodiment further provided by the present invention, symmetrically arranged sleeves 53 are fixedly mounted on the engaging block 5 , a plurality of clamping blocks 7 are arranged on the opening and closing grinding wheel 3 , and a clamping groove 71 is provided on the sleeve 53 to be clamped and assembled by the clamping blocks 7 .

[0049] Specifically, the sleeve 53 is located at the axis of the engaging block 5 , and the sleeve 53 is sleeved on the central axis 6 , and the rotatable movable slot 71 is circumferentially arranged on the side wall of the sleeve 53 .

[0050] Furthermore, the opening and closing grinding wheel 3 is also sleeved on the side wall of the sleeve 53 and rotates, and the rotating inner circle of the opening and closing grinding wheel 3 is provided with a plurality of holes 70 for receiving the card blocks 7. The card blocks 7 are hinged at the ends of the holes 70, and the hinged positions are provided with torsion springs and damping.

[0051] Furthermore, the block 7 has a right-angled triangle cross-section, and the torsion spring causes the right-angled vertex of the block 7 to be inserted into the slot 71 in the default state, and causes the block 7 to be received in the hole 70 when the opening and closing grinding wheel 3 rotates at high speed; even if the block 7 is not completely received in the hole 70 under the action of centrifugal force, the long right-angled sides of the block 7 will repeatedly slide out from the ports of multiple slots 71 until the right-angled vertex of the block 7 slides on the side wall of the sleeve 53, thereby ensuring the normal rotation of the opening and closing grinding wheel 3.

[0052] Furthermore, the end of the sleeve 53 is rotated on the power rod 2, and a torsion spring and a damper are provided at the rotation position, so that the rotated sleeve 53 can slowly reset the engaging block 5 until the opened opening and closing grinding wheel 3 completes the grinding work in the current state, and then the engaging block 5 returns to the default position so as to adjust it again when grinding the next spline groove.

[0053] Furthermore, the rotating inner rings of the opening and closing grinding wheel 3 and the grinding wheel block 4 are both provided with a trapezoidal opening, and the smaller bottom surfaces of the two trapezoidal openings are connected (similar to connecting the bottoms of two bowls to each other). The purpose is that when the opening and closing grinding wheel 3 is deflected, the trapezoidal opening thereon can adaptively contact the side wall of the sleeve 53 to avoid the situation where it cannot be deflected.

[0054] After the power rod 2 drives the opening and closing grinding wheels 3 in the closed state to perform grinding work, the opening and closing grinding wheels 3 are separated from the spline groove. At this time, the belt 32 stops working to reset the block 7 under the action of the torsion spring to restore the deformation, so that the block 7 is slowly inserted into the slot 71 with the damping. At this time, the opening and closing grinding wheels 3 are reversed at a low speed to make the short right-angle side of the block 7 abut against the slot 71, and to drive the sleeve 53 to rotate on the central axis 6, so that the mosaic block 5 slides in the arc groove section 41, and the two opening and closing grinding wheels 3 are opened. After the two opening and closing grinding wheels 3 are opened, the opening and closing grinding wheels 3 are rotated forward again to make the block 7 actively slide out of the slot 71, and gradually be received in the receiving hole 70 under the action of centrifugal force, so that the two opening and closing grinding wheels 3 continue to grind after opening.

[0055] As another embodiment further provided by the present invention, a plurality of locking holes 62 are provided on the grinding wheel block 4 , and a locking block 61 is movably provided on the central shaft 6 to be plugged into and matched with the locking holes 62 to lock the grinding wheel block 4 .

[0056] Specifically, circumferentially arranged holes are opened on the side wall of the central axis 6, and the locking block 61 slides in the holes, and a spring and a damper are fixedly installed between the locking block 61 and the hole, so that when the locking block 61 slides out of the hole after the spring restores the deformation, it can slowly extend out under the action of the rubber damper.

[0057] Furthermore, the locking hole 62 is located on the opposite end surface of the grinding wheel block 4 where the arc groove section 41 is opened, and the locking hole 62 is circumferentially arranged on the rotating inner circle of the grinding wheel block 4 so that the locking block 61 can be docked with the grinding wheel block 4.

[0058] When the grinding wheel block 4 is sleeved on the central shaft 6, the locking block 61 extends from the hole on the central shaft 6 and is inserted into the locking hole 62, which is used to lock the grinding wheel block 4 circumferentially to prevent the grinding wheel block 4 from rotating when the opening and closing grinding wheel 3 is driven by the belt 32. The purpose is to ensure the stability of the grinding wheel block 4 so that the grinding wheel block 4, which is responsible for the axial movement, can improve the opening efficiency of the opening and closing grinding wheel 3.

[0059] As another embodiment further provided by the present invention, a plurality of sleeve holes 54 are formed on the sleeve 53, and the locking block 61 is located in the sleeve holes 54 and moves circumferentially.

[0060] Specifically, the sleeve holes 54 are arranged circumferentially on the side wall of the sleeve 53, the slots 71 are opened at the position where the sleeve holes 54 are not opened, and the arc length of the sleeve holes 54 is greater than the rotation angle of the engaging block 5, that is, the spacing change after the two opening and closing grinding wheels 3 are fully opened is satisfied, avoiding the problem of jamming of parts during operation.

[0061] Before the center shaft 6 is installed on the end of the power rod 2, multiple locking blocks 61 are pressed back into the holes, and then the sleeve 53 is sleeved on the center shaft 6. The locking blocks 61 are squeezed by the inner wall of the sleeve 53 until the locking blocks 61 can extend from the sleeve hole 54, and then snapped into the locking hole 62 for circumferential locking, which is used to keep the grinding wheel block 4 fixed and improve the pushing effect of the grinding wheel block 4 on the opening and closing grinding wheel 3. In the process of axial movement of the grinding wheel block 4, the locking blocks 61 passively slide in the locking hole 62 to avoid the problem of the grinding wheel block 4 getting stuck during movement.

[0062] As another embodiment further provided by the present invention, a guard strip 33 is slidably provided on the transmission head 31 , and a guard 34 located outside the belt 32 is fixedly mounted on the guard strip 33 .

[0063] Specifically, a spring is fixedly installed at the rounded end of the guard strip 33, the spring is arranged in an annular shape outside the central axis 6, and the other end of the spring is fixedly installed on the power rod 2 to limit the guard strip 33 and avoid torque from interfering with the transmission work of the belt 32.

[0064] Furthermore, the shield 34 is formed by bending the end of the guard strip 33 , and a rounded rectangular hole is provided on the shield 34 for the belt 32 to pass through, thereby ensuring the normal transmission of the belt 32 .

[0065] The protection cover 34 can provide support for the transmission of the belt 32, and at the same time, shield the area around the belt 32 to prevent sparks generated by grinding from damaging the belt 32, thereby increasing the service life and safety of the belt 32. The spring provided on the guard strip 33 can, on the one hand, limit the guard strip 33 to prevent the guard strip 33 from rotating during the rotation of the transmission head 31, and on the other hand, store force and deform the opening and closing grinding wheel 3 in the open state so that the spring can restore the deformation and push the opening and closing grinding wheel 3 to return to its original position and close together.

[0066] As another embodiment further provided by the present invention, a fixing piece 8 for clamping the central axis 6 is disposed at the end of the power rod 2 , and the guard strip 33 in the axially movable state abuts against the fixing piece 8 .

[0067] Specifically, a U-shaped opening is provided at the end of the power rod 2, and the protrusion on the fixing member 8 is inserted into the opening, and the side wall of the central axis 6 is fixed, and finally the fixing member 8 is fastened to the end of the power rod 2 with bolts, and the protrusion end on the fixing member 8 has an inclined surface, and the installation method of the protrusion is to move radially away from the axial direction of the grinding head 1 (similar to the fastening method of inserting a pin block into a traditional agricultural tool), so that the fixation of the protrusion to the central axis 6 can also be strengthened under the action of centrifugal force.

[0068] The opening at the end of the power rod 2 can make the central shaft 6 easier to disassemble and assemble, and the fixing part 8 is used to improve the disassembly and assembly efficiency. The fixing part 8 has an "L"-shaped plate in cross section, so that the opening and closing grinding wheel 3 in the open state causes the rounded corner position of the guard strip 33 to contact the plate, so that the pressure generated by the guard strip 33 acts on the protrusion of the fixing part 8, further improving the fastening effect of the central shaft 6 and ensuring the stability of the opening and closing grinding wheel 3 during operation.

[0069] As another embodiment further provided by the present invention, it also includes an air pipe 9 arranged between the two power rods 2, and two shields 34 in the deployed state divert the exhaust of the air pipe 9.

[0070] Specifically, the exhaust port of the air pipe 9 is arranged at the axis of the grinding head 1, and the airflow delivered by the air pipe 9 is connected with the pneumatic blowing on the grinding machine. The air supply method is the existing technology and will not be described here.

[0071] The airflow ejected through the air pipe 9 acts on the outer side of the opening and closing grinding wheels 3 in the closed state, so that the sparks generated during the grinding process of the opening and closing grinding wheels 3 are blown away from the spline shaft by the airflow, thereby reducing the spark damage to the belt 32 and the spline groove after grinding. When the two opening and closing grinding wheels 3 are opened, the two protective covers 34 that originally conflicted with each other are opened, so that the airflow is diverted to enter between the two protective covers 34 and is transported between the two grinding wheel blocks 4. The purpose is that the airflow can be blown outward from the two grinding wheel blocks 4, which is used to reduce the sparks entering between the two opening and closing grinding wheels 3 and ensure the normal opening / closing work of the opening and closing grinding wheels 3.

[0072] As another embodiment further provided by the present invention, the engaging block 5 in the rotating state cooperates with the two deployed shields 34 to redirect the exhaust airflow.

[0073] Specifically, Fig.11 As shown, when the two shields 34 present a trapezoidal range, the port for the split flow to enter is reduced, so as to speed up the air flow rate between the two grinding wheel blocks 4 .

[0074] After the port between the shields 34 is narrowed, the air flow rate entering the two grinding wheel blocks 4 is increased, and the rotating engaging block 5 changes the direction of the end of the fan slope 51 facing the air flow direction in the default state, that is, the position with the smallest thickness of the two fan slopes 51 is deflected away from the inner wall of the spline groove, and the fan slope 51 of the air flow entering between the two grinding wheel blocks 4 is guided and drained, so that the air flow flows toward the position of the fan plane 52, that is, toward the inner wall of the spline groove, so that the air flow can be directly blown to the grinding position of the inner wall of the spline groove, which greatly reduces the situation where sparks enter the two opening and closing grinding wheels 3, ensures the working safety of components, and reduces damage to components.

[0075] Working principle: during the rotation of the engaging block 5, the fan bevel 51 actively slides between the two first bevel grooves 411, and gradually slides to the position where the distance between the two first bevel grooves 411 is reduced, and in this process, the surface of the fan bevel 51 fits with the surface of the first bevel groove 411, so that the two grinding wheel blocks 4 are forced to open in parallel, on the one hand, the coverage area between the circular side wall of the opening and closing grinding wheel 3 and the inner wall of the spline groove is expanded, and on the other hand, the side edge of the opening and closing grinding wheel 3 fits with the side wall of the spline groove, which is used for high-efficiency grinding of the three walls of the rectangular spline groove; and when the fan plane 52 slides from the flat groove 412 into the second bevel groove 413, similarly, the fan plane 52 gradually moves to The two second inclined grooves 413 slide at a reduced spacing, and at this time the fan bevel 51 slides into the flat groove 412 and cannot push, so that the two grinding wheel blocks 4 are forced to open. However, since the thickness of the fan plane 52 is greater than the thickness of the fan bevel 51, a gap is gradually formed between the fan bevel 51 and the flat groove 412, and the fit cannot be satisfied. During the sliding of the fan plane 52, the flat groove 412 is driven to move closer to the fan bevel 51 to fill this gap, so that the two grinding wheel blocks 4 are deflected and the two opening and closing grinding wheels 3 are opened in a table shape to adapt to the table-shaped spline groove grinding, thereby obtaining an opening and closing grinding wheel 3 that is adapted to the grinding of the inner walls of different spline grooves.

[0076] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A grinding device for a spline flange of a vehicle transmission shaft, comprising a grinding head (1) provided with a power rod (2), characterized in that: It also comprises a central shaft (6) arranged at the end of the power rod (2), on which symmetrically arranged grinding wheel blocks (4) are fixedly arranged, and on which the opening and closing grinding wheels (3) are rotatably arranged; A fitting block (5) is movably sleeved on the central axis (6), a fan slope (51) and a fan plane (52) are arranged on the end surface of the fitting block (5), and the grinding wheel block (4) can be switched between the fan slope (51) and the fan plane (52).

2. The grinding equipment for the spline flange of a vehicle transmission shaft according to claim 1, characterized in that: An arc groove section (41) is provided on the end surface of the grinding wheel block (4), and the arc groove section (41) is divided into a first inclined groove (411) and a second inclined groove (413) according to the shape; the fan inclined surface (51) is slidably matched with the first inclined groove (411), and the fan plane (52) is slidably matched with the second inclined groove (413).

3. The grinding equipment for the spline flange of a vehicle transmission shaft according to claim 2, characterized in that: It also comprises a belt (32) arranged on the grinding head (1), and a driving head (31) driven by the belt (32) is fixedly mounted on the opening and closing grinding wheel (3).

4. The grinding equipment for the spline flange of the automobile transmission shaft according to claim 3, characterized in that: The engaging block (5) is fixedly mounted with symmetrically arranged sleeves (53), the opening and closing grinding wheel (3) is provided with a plurality of clamping blocks (7), and the sleeve (53) is provided with clamping grooves (71) which are clamped and assembled by the clamping blocks (7).

5. The grinding equipment for the spline flange of the automobile transmission shaft according to claim 4, characterized in that: The grinding wheel block (4) is also provided with a plurality of locking holes (62), and the central shaft (6) is movably provided with a locking block (6) which is plugged into and matched with the locking holes (62) to lock the grinding wheel block (4).

6. The grinding equipment for the spline flange of the automobile transmission shaft according to claim 5, characterized in that: The sleeve (53) is provided with a plurality of sleeve holes (54), and the locking block (6) is located in the sleeve holes (54) and moves circumferentially.

7. The grinding equipment for the spline flange of a vehicle transmission shaft according to claim 5, characterized in that: A guard strip (33) is slidably provided on the transmission head (31), and a guard cover (34) located outside the belt (32) is fixedly installed on the guard strip (33).

8. The grinding equipment for the spline flange of the automobile transmission shaft according to claim 7, characterized in that: The end of the power rod (2) is provided with a fixing piece (8) for clamping the central axis (6), and the guard strip (33) in the axially movable state abuts against the fixing piece (8).

9. The grinding equipment for the spline flange of a vehicle transmission shaft according to claim 7, characterized in that: It also includes an air pipe (9) arranged between the two power rods (2), and two protective covers (34) in the deployed state divert the exhaust of the air pipe (9).

10. The grinding equipment for the spline flange of the automobile transmission shaft according to claim 9, characterized in that: The engaging block (5) in the rotating state cooperates with the two deployed shields (34) to redirect the exhaust airflow.

Images