Polishing device for conical disc of automobile continuously variable transmission

Abstract

The invention relates to the technical field of grinding of conical discs of automobile gearboxes, in particular to a grinding device for a conical disc of an automobile continuously variable transmission. Comprising a frame body which is provided with a rotating main shaft; the rotating shaft is fixedly connected to a rotating main shaft on the frame body; the fixing frame is fixedly connected to the frame body; and the two grinding pieces are arranged on the frame body in a mirror image mode, each grinding piece is in a circular truncated cone shape, and the inclination angle of a horizontal generatrix of each grinding piece is the same as that of a horizontal generatrix of the adjacent conical disc, so that the grinding trace is spiral. The grinding piece moves back and forth relative to the conical disc, so that the grinding lines of the conical disc are spiral, and the two spiral lines generated by the back and forth movement of the grinding piece are staggered, so that a plurality of rhombic lines are formed on the conical surface of the conical disc, the lubricating performance is improved, and vibration is reduced; and the repairing and grinding effect on the conical disc is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of grinding a conical disc of an automobile gearbox, and in particular to a grinding device for a conical disc of an automobile stepless gearbox. Background Art

[0002] A continuously variable transmission for automobiles is a transmission that shifts speeds without a sense of jerk. It is widely used because cars equipped with this type of transmission are smoother than traditional cars during driving. A continuously variable transmission is mainly composed of two sets of conical discs and a steel belt between them. By changing the distance between the two conical discs in the same group, the transmission ratio between the two sets of conical discs is changed, thereby achieving the purpose of continuously variable speed change.

[0003] As the main component of power transmission, the characteristics of the cone disc directly affect the normal operation of the continuously variable transmission. Therefore, during the production process of the cone disc, it needs to be polished accordingly to make the cone disc meet the requirements of clamping and lubrication. As the cone disc is used for a longer time, it will be worn out. In this case, it is necessary to repair and polish the cone disc. The existing polishing method is usually to manually polish the cone disc with an oilstone. Since it is difficult to ensure the polishing accuracy of the cone disc manually, the original texture of the cone disc is destroyed, which affects the subsequent normal use of the cone disc and even causes the continuously variable transmission to be scrapped. Summary of the invention

[0004] In order to overcome the shortcomings mentioned in the above technical background, the present invention provides a grinding device for a conical disc of an automobile continuously variable transmission.

[0005] Technical solution: A grinding device for a tapered disc of an automobile continuously variable transmission, comprising: a frame, on which a rotating spindle is provided; a rotating shaft, fixedly connected to the rotating spindle on the frame; a fixed frame, fixedly connected to the frame; two mirror-arranged grinding pieces, both provided on the frame, the grinding pieces are frustum-shaped, and the inclination angle of their horizontal generatrix is ​​the same as the inclination angle of the horizontal generatrix of the adjacent tapered disc, and the grinding marks on the tapered disc are spirally shaped by changing the distance between the axis of the grinding piece and the axis of the tapered disc; a fixing mechanism, provided on the rotating shaft, for clamping and fixing the tapered disc; a feeding mechanism, provided on the fixed frame, for grinding the tapered disc to the same extent at all locations, and for connecting the frame and the grinding piece.

[0006] Furthermore, the fixing mechanism includes: a fixing part fixedly connected to the rotating shaft; an intermediate sleeve installed on the fixing part; a clamping nut threadedly connected to the fixing part and used to clamp the conical disk; a supporting part arranged on the frame, the supporting part and the rotating shaft limiting cooperation are used to provide anti-bending support for the rotating shaft.

[0007] Furthermore, the fixing member is provided with a boss, and the clamping nut never contacts the boss, so that the clamping nut can fully squeeze the two conical disks.

[0008] Furthermore, the feeding mechanism includes: an electric push rod installed on the fixed frame; a moving part fixedly connected to the telescopic end of the electric push rod; a moving shell fixedly connected to the moving part; two connecting parts arranged in a mirror image, both provided on the moving shell; two first sliding parts arranged in a mirror image, respectively spline-connected to adjacent connecting parts, the first sliding parts are fixedly connected to the adjacent polishing parts, and the first sliding parts are slidably connected to the moving shell; a transmission assembly is provided on the moving shell, and is used to make the two first sliding parts move relative to each other.

[0009] Furthermore, the back sides of the two first sliding members are both made of a soft material that can only undergo axial deformation, so as to allow the grinding member to have a movement margin to facilitate grinding work.

[0010] Further, the transmission assembly includes: a rotating member, rotatably connected to the movable shell; two threaded rods arranged in a mirror image, both fixedly connected to the rotating member; two second sliding members arranged in a mirror image, both splined to the movable shell, the second sliding member threadably cooperates with the adjacent threaded rod, the second sliding member is rotationally connected to the adjacent first sliding member in a limited position, and a power structure is arranged on the frame, for causing the rotating member and the movable shell to rotate relative to each other.

[0011] Furthermore, the power structure includes: a rack fixedly connected to the frame; a rotating shaft rotatably connected to the moving part, the rotating shaft and the rotating part are connected via a pulley belt transmission; a gear fixedly connected to the rotating shaft, the gear meshing with the rack.

[0012] Furthermore, the tooth pitch of the rack, the transmission ratio between the rotating shaft and the rotating member, the pitch of the thread on the threaded rod, and the slope of the conical surface on the conical disk match each other.

[0013] Furthermore, it also includes: a motor installed on the moving shell, the connecting member is rotatably connected to the moving shell, the motor has a double output shaft, and the connecting member is connected to the adjacent output shafts on the motor through a pulley belt transmission.

[0014] Furthermore, the rotation direction of the grinding piece under the power output of the motor is opposite to the rotation direction of the conical disk under the power output of the main shaft on the frame.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: the grinding piece moves back and forth relative to the conical disk, so that the grinding pattern of the conical disk is spiral, and the two spiral patterns generated by the forward and backward movement of the grinding piece are intertwined, so that a plurality of "diamond-shaped" patterns are formed on the conical surface of the conical disk, thereby improving the lubrication performance and reducing vibration, thereby improving the repair and grinding effect of the conical disk; the conical disk on the right is squeezed by the clamping nut, so that the two conical disks are clamped and fixed, ensuring the stability of the conical disk in the subsequent grinding process, thereby improving the repair and grinding effect of the conical disk The grinding effect of the conical disk is improved; the relative position of the grinding parts on the adjacent conical disks is changed by moving the two grinding parts towards each other (back to back), while keeping the contact stress between the conical surfaces of the adjacent conical disks unchanged, so that all parts on the conical disks are ground to the same extent, thereby improving the grinding effect of the conical disks; the adjacent grinding parts are driven to rotate together by the first sliding part, so that the relative rotation speed between the grinding parts and the adjacent conical disks is increased, the contact frequency between the grinding parts and the adjacent conical disks is increased, and the plastic deformation of the surface of the conical disk is reduced, thereby improving the grinding effect of the conical disk. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 It is a three-dimensional structural schematic diagram of the rotating shaft and the parts thereon of the present invention; Figure 3 It is a three-dimensional structural exploded diagram of the rotating shaft and the parts thereon of the present invention; Figure 4 It is a three-dimensional structural schematic diagram of the movable shell and the parts thereon of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the threaded rod and the second sliding member of the present invention; Figure 6 It is a sectional view of the three-dimensional structure when the movable shell and the connecting member of the present invention rotate relative to each other; Figure 7 It is a three-dimensional structural exploded diagram of the movable shell and the parts thereon of the present invention; Figure 8 It is a schematic diagram of the three-dimensional structure when the moving part and the rotating shaft of the present invention rotate relative to each other.

[0017] Figure numbers: 101-conical disk, 1-frame, 2-rotating shaft, 3-fixed frame, 4-polishing part, 501-fixed part, 502-middle sleeve, 601-tightening nut, 602-support part, 701-electric push rod, 702-moving part, 703-moving shell, 704-connecting part, 705-first sliding part, 801-rotating part, 802-threaded rod, 803-second sliding part, 901-rack, 902-rotating shaft, 903-gear, 10-motor. DETAILED DESCRIPTION

[0018] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation mode of the present invention is described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are elaborated to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0019] like Figure 1 As shown, an embodiment of the present invention is proposed, which provides a grinding device for a tapered disc of a continuously variable transmission of an automobile, and is used for grinding the tapered disc of the continuously variable transmission of an automobile, comprising: a frame 1, on which a rotating spindle is arranged; a rotating shaft 2, fixedly connected to the rotating spindle on the frame 1; a fixed frame 3, fixedly connected to the frame 1; two mirror-arranged grinding pieces 4, both arranged on the frame 1, the grinding pieces 4 are truncated, and the inclination angle of the horizontal generatrix thereof is the same as the inclination angle of the horizontal generatrix of the adjacent tapered disc 101, and the grinding marks on the tapered disc 101 are spirally shaped by changing the distance between the axis of the grinding piece 4 and the axis of the tapered disc 101; a fixing mechanism, arranged on the rotating shaft 2, for clamping and fixing the tapered disc 101; a feeding mechanism, arranged on the fixed frame 3, for grinding the tapered disc 101 to the same degree at all places, and for connecting the frame 1 and the grinding piece 4.

[0020] In the above scheme, it is intended to solve the problem in the prior art that when grinding the conical disk 101, the texture of the conical disk 101 is uneven after grinding, which affects the normal use, so as to improve the grinding effect of the conical disk 101. A grinding device for a conical disk of an automobile continuously variable transmission in this embodiment, wherein the frame 1 is in the form of a traditional machine tool, which is used to provide power to the rotating shaft 2, thereby rotating the conical disk 101, and a cooling system (not drawn in the schematic diagram) is also installed on the frame 1, which is used to cool the grinding area of ​​the conical disk 101, and the fixing frame 3 is high-strength steel, which is used to ensure the high stability of the parts thereon during the working process, thereby improving the grinding effect of the conical disk 101, and grinding stones are arranged on the conical surfaces of the grinding parts 4, and the particle size of the grinding stones can be flexibly limited as needed. When grinding, first place the two conical disks 101 in sequence on the fixing mechanism in the form of conical surfaces facing each other. After the two conical disks 101 are clamped and fixed by the fixing mechanism, start the rotating spindle on the frame 1, and use the feeding mechanism to move both grinding pieces 4 backward (close to and contact with the conical disk 101), so as to grind the conical surface of the conical disk 101. During the grinding process, the grinding piece 4 is moved backward relative to the conical disk 101, so that the grinding texture of the conical disk 101 is spiral. Then, when the grinding piece 4 moves forward, the conical disk 101 forms a new spiral texture. The two spiral textures are intertwined to form a plurality of "diamond" textures on the conical surface of the conical disk 101 for temporarily storing lubricating oil, thereby improving the lubrication performance and reducing vibration, thereby improving the repair and grinding effect of the conical disk 101.

[0021] like Figure 1-Figure 3 As shown, the fixing mechanism includes: a fixing member 501, fixedly connected to the rotating shaft 2; an intermediate sleeve 502, installed on the fixing member 501; a clamping nut 601, threadedly connected to the fixing member 501, used to clamp the conical disk 101; the fixing member 501 is provided with a boss, and the clamping nut 601 is never in contact with the boss, which is used to enable the clamping nut 601 to fully squeeze the two conical disks 101; a supporting member 602, arranged on the frame 1, and the supporting member 602 is limitedly matched with the rotating shaft 2, and is used to provide anti-bending support for the rotating shaft 2.

[0022] In the above scheme, a groove is provided on the right side of the rotating shaft 2, and protrusions and rotating handles are respectively provided on the left and right sides of the supporting member 602, which are used to make the protrusions on it fit in the grooves on the rotating shaft 2, so that both the left and right ends of the rotating shaft 2 are supported, the flexible deformation of the rotating shaft 2 is reduced, and the stability of the rotating shaft 2 during the rotation process is improved, thereby improving the grinding effect of the conical disk 101. First, a conical disk 101 is placed on the left side of the fixing member 501, and then the middle sleeve 502 and the other conical disk 101 are placed in the middle and right side of the fixing member 501 in turn, so that the two conical disks 101 are located on the left and right sides of the middle sleeve 502, and finally the clamping nut 601 is screwed onto the fixing member 501, and the conical disk 101 on the right is squeezed, so as to grind the two conical disks 101. The clamping and fixing are performed to ensure the stability of the conical disk 101 during the subsequent grinding process, thereby improving the grinding effect of the conical disk 101. Since the formation of the clamping nut 601 can never reach the degree of contact with the boss on the fixing member 501, the clamping nut 601 can always be rotated in the threaded area on the fixing member 501, and the adjacent conical disk 101 can be continuously squeezed, so as to fully squeeze it, thereby improving the stability of the conical disk 101 during the grinding process, and then the rotating handle on the support member 602 is rotated to make the protrusion on the support member 602 move to the left and cooperate with the groove limiter on the rotating shaft 2, so as to reduce the deformation of the rotating shaft 2 caused by gravity, improve the stability of the conical disk 101 during subsequent grinding, and thereby improve the grinding effect of the conical disk 101.

[0023] like Figure 2 and Figure 4-Figure 7 As shown, the feeding mechanism includes: an electric push rod 701, installed on a fixed frame 3; a moving member 702, fixedly connected to the telescopic end of the electric push rod 701; a moving shell 703, fixedly connected to the moving member 702; two mirror-arranged connecting members 704, both of which are arranged on the moving shell 703; two mirror-arranged first sliding members 705, respectively spline-connected to adjacent connecting members 704, the first sliding member 705 is fixedly connected to the adjacent grinding member 4, and the first sliding member 705 is slidably connected to the moving shell 703; the back sides of the two first sliding members 705 are both set to soft material, and the soft material can only undergo axial deformation, so as to allow the grinding member 4 to have a movement margin, thereby facilitating the grinding work; a transmission assembly, arranged on the moving shell 703, is used to cause the two first sliding members 705 to move relative to each other.

[0024] In the above scheme, the axis of the grinding piece 4, the axis of the connecting piece 704, the axis of the first sliding piece 705 and the axis of the moving shell 703 coincide, so as to make the rotating grinding piece 4 contact evenly with the adjacent conical disk 101, the telescopic end of the electric push rod 701 drives the moving piece 702 to move backward (forward), the moving piece 702 drives the moving shell 703 to move backward (forward) together, the moving shell 703 drives the two connecting pieces 704 and the two first sliding pieces 705 to move backward (forward) together, the sliding piece 705 drives the adjacent grinding piece 4 to move backward (forward), and the conical disk 101 rotates continuously during the process, so that the grinding piece 4 is used to reciprocately grind the conical surface of the conical disk 101, so that the conical surface of the conical disk 101 forms a special "diamond" pattern, thereby improving the use effect of the conical disk 101 after grinding.

[0025] like Figure 4-Figure 7 As shown, the transmission assembly includes: a rotating member 801, which is rotatably connected to the moving shell 703; two threaded rods 802 arranged in a mirror image, both of which are fixedly connected to the rotating member 801; two second sliding members 803 arranged in a mirror image, both of which are splined to the moving shell 703, the second sliding member 803 is threadedly matched with the adjacent threaded rod 802, and the second sliding member 803 is limitedly rotatably connected with the adjacent first sliding member 705, and the power structure is arranged on the frame 1, which is used to make the rotating member 801 and the moving shell 703 rotate relative to each other.

[0026] In the above scheme, the threads on the two threaded rods 802 are rotated in opposite directions, so as to enable the two second sliding members 803 to move in opposite directions (backwards), the axis of the rotating member 801, the axis of the threaded rod 802 and the axis of the second sliding member 803 coincide, and the opposite sides of the two first sliding members 705 are provided with cavities for accommodating adjacent threaded rods 802, and the threaded rods 802 move in the cavities in the adjacent first sliding members 705. When the moving shell 703 moves backward, the rotating member 801 rotates, and the rotating member 801 drives the two threaded rods 802 to rotate together, and the rotating threaded rods 802 The adjacent second sliding members 803 are driven to move together (the two second sliding members 803 move towards each other), the second sliding members 803 drive the adjacent first sliding members 705 to move together (the two first sliding members 705 move towards each other), and the first sliding member 705 drives the adjacent grinding members 4 to move together (the two grinding members 4 move towards each other), thereby changing the relative position of the grinding members 4 on the adjacent conical disks 101, while maintaining the contact stress between the conical surfaces of the adjacent conical disks 101, so as to evenly grind various locations on the conical disks 101, thereby improving the grinding effect of the conical disks 101.

[0027] like Figure 2 , Figure 4 and Figure 8As shown, the power structure includes: a rack 901, fixedly connected to the frame 1; a rotating shaft 902, rotatably connected to the moving member 702, and the rotating shaft 902 and the rotating member 801 are connected via a pulley belt transmission; a gear 903, fixedly connected to the rotating shaft 902, and the gear 903 is meshed with the rack 901; the pitch of the rack 901, the transmission ratio between the rotating shaft 902 and the rotating member 801, the pitch of the thread on the threaded rod 802, and the inclination of the conical surface on the conical disk 101 match each other, so as to enable the grinding piece 4 to grind the conical disk 101 with the same contact stress.

[0028] In the above scheme, the teeth on the gear 903 and the teeth on the rack 901 are tempered to improve the surface hardness of the two and extend the service life of the two. In the process of the moving member 702 moving backward, the moving member 702 drives the rotating shaft 902 to move backward together, and the rotating shaft 902 drives the gear 903 to move backward together. The gear 903 rolls along the rack 901, and the gear 903 rotates. The gear 903 drives the rotating shaft 902 to start rotating, and the rotating shaft 902 and the moving member 702 rotate relative to each other. The rotating shaft 902 transmits power to the rotating member 801 through the pulley belt, and the rotating member 801 starts to rotate. The rotating member 801 and the moving shell 703 rotate relative to each other. During the process, the grinding member 4 gradually moves backward under the premise of maintaining close contact with the adjacent conical disk 101 (the two grinding members 4 also move in opposite directions during the backward movement), so as to fully grind the adjacent conical disk 101.

[0029] like Figure 4 and Figure 5 As shown, it also includes: a motor 10, installed on a movable shell 703, a connecting member 704 rotatably connected to the movable shell 703, the motor 10 has a double output shaft, and the connecting member 704 is connected to the adjacent output shafts on the motor 10 through a pulley belt transmission; the rotation direction of the grinding piece 4 under the power output of the motor 10 is opposite to the rotation direction of the conical disk 101 under the power output of the main shaft on the frame 1, which is used to increase the relative rotation speed between the two.

[0030] In the above scheme, the motor 10 is a servo motor, which is used to automatically change the rotation speed of its output shaft, so as to change the rotation speed of the grinding piece 4, so that the rotation speed of the grinding piece 4 gradually increases during the backward movement, so as to compensate for the uneven grinding caused by the gradual decrease in the diameter of the conical surface of the conical disk 101 and the decrease in the relative rotation speed of the two. The two output shafts on the motor 10 transmit power to the adjacent connecting members 704 through adjacent pulley belts respectively, and then the connecting members 704 begin to drive the adjacent first sliding members 705 to rotate together, and the first sliding member 705 drives the adjacent grinding piece 4 to rotate together, so that the grinding piece 4 and the adjacent conical disk 101 rotate in the opposite direction, so as to increase the relative rotation speed between the grinding piece 4 and the adjacent conical disk 101, increase the contact frequency between the grinding piece 4 and the adjacent conical disk 101, reduce the plastic deformation of the surface of the conical disk 101, and thus improve the grinding effect of the conical disk 101.

[0031] The preferred embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various specific technical features in any suitable manner. For example, in order to avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A grinding device for a tapered disc of an automobile continuously variable transmission, characterized in that it comprises: A frame (1), wherein a rotating main shaft is provided on the frame (1); A rotating shaft (2) is fixedly connected to the rotating main shaft on the frame (1); A fixed frame (3) fixedly connected to the frame body (1); Two mirror-arranged grinding pieces (4) are both arranged on the frame (1); the grinding piece (4) is truncated cone-shaped, and the inclination angle of its horizontal generatrix is ​​the same as the inclination angle of the horizontal generatrix of the adjacent conical disk (101); by changing the distance between the axis of the grinding piece (4) and the axis of the conical disk (101), the grinding mark on the conical disk (101) is spiral-shaped; A fixing mechanism, arranged on the rotating shaft (2), and used for clamping and fixing the conical disc (101); A feeding mechanism, arranged on the fixed frame (3), used for grinding the conical disc (101) to the same degree at all locations, and also used for connecting the frame (1) and the grinding member (4); The feeding mechanism comprises: An electric push rod (701) mounted on the fixing frame (3); A moving member (702) fixedly connected to the telescopic end of the electric push rod (701); A moving shell (703) fixedly connected to the moving member (702); Two connecting members (704) arranged in a mirror image are both provided on the movable shell (703); Two first sliding members (705) arranged in a mirror image are respectively spline-connected to the adjacent connecting members (704), the first sliding member (705) is fixedly connected to the adjacent grinding member (4), and the first sliding member (705) is slidably connected to the movable shell (703); A transmission assembly is arranged on the moving shell (703) and is used to enable the two first sliding members (705) to move relative to each other.

2. A grinding device for a tapered disc of a continuously variable transmission of an automobile according to claim 1, characterized in that: The fixing mechanism comprises: A fixing member (501) fixedly connected to the rotating shaft (2); An intermediate sleeve (502) is mounted on the fixing member (501); A compression nut (601) threadedly connected to the fixing member (501) and used for compressing the conical disk (101); A support member (602) is arranged on the frame body (1), and the support member (602) is limitedly matched with the rotating shaft (2) to provide anti-bending support for the rotating shaft (2).

3. A grinding device for a tapered disc of a continuously variable transmission of an automobile according to claim 2, characterized in that: The fixing member (501) is provided with a boss, and the clamping nut (601) never contacts the boss, so that the clamping nut (601) can fully squeeze the two conical disks (101).

4. A grinding device for a tapered disc of a continuously variable transmission of an automobile according to claim 1, characterized in that: The back sides of the two first sliding members (705) are both made of a soft material, which can only undergo axial deformation, so as to allow the grinding member (4) to have a movement margin, thereby facilitating the grinding work.

5. A grinding device for a tapered disc of a continuously variable transmission of an automobile according to claim 1, characterized in that: The transmission assembly comprises: A rotating member (801) rotatably connected to the moving shell (703); Two threaded rods (802) arranged in mirror image are both fixedly connected to the rotating member (801); Two second sliding members (803) arranged in mirror image are both spline-connected to the moving shell (703), the second sliding member (803) is threadedly matched with the adjacent threaded rod (802), and the second sliding member (803) is rotationally connected to the adjacent first sliding member (705) in a limited position; A power structure is arranged on the frame (1) and is used to enable the rotating member (801) and the movable shell (703) to rotate relative to each other.

6. A grinding device for a tapered disc of a continuously variable transmission of an automobile according to claim 5, characterized in that: The power structure includes: A rack (901) fixedly connected to the frame (1); A rotating shaft (902) is rotatably connected to the moving member (702), and the rotating shaft (902) and the rotating member (801) are connected via a pulley and belt transmission; A gear (903) is fixedly connected to the rotating shaft (902), and the gear (903) is meshed with the rack (901).

7. A grinding device for a tapered disc of a continuously variable transmission of an automobile according to claim 6, characterized in that: The tooth pitch of the rack (901), the transmission ratio between the rotating shaft (902) and the rotating member (801), the pitch of the thread on the threaded rod (802), and the inclination of the conical surface on the conical disk (101) match each other.

8. The grinding device for the tapered disc of a continuously variable transmission of an automobile according to claim 5, characterized in that: Also included are: The motor (10) is mounted on the moving shell (703), the connecting member (704) is rotationally connected to the moving shell (703), the motor (10) has a double output shaft, and the connecting member (704) is connected to adjacent output shafts on the motor (10) via a pulley belt drive.

9. A grinding device for a tapered disc of a continuously variable transmission of an automobile according to claim 8, characterized in that: The direction of rotation of the grinding piece (4) under the power output of the motor (10) is opposite to the direction of rotation of the conical disc (101) under the power output of the main shaft on the frame (1).

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