Auxiliary device for replacing grinding wheel

Abstract

The utility model provides an auxiliary device for replacing a grinding wheel, and belongs to the technical field of grinding wheel replacement. The auxiliary device comprises a fixed base, a first rotating shaft, a connecting rod assembly, an adjusting seat and a clamping piece; the first rotating shaft is movably connected with the fixed base in the axial direction of the first rotating shaft, the end, away from the fixed base, of the first rotating shaft is rotationally connected with the connecting rod assembly, the connecting rod assembly can rotate around the axis of the first rotating shaft, and the end, away from the first rotating shaft, of the connecting rod assembly is rotationally connected with the adjusting base. The clamping piece is movably installed on the adjusting base, the moving direction of the clamping piece is parallel to the axis of the first rotating shaft, and the clamping piece is used for being connected with a grinding wheel; the connecting rod assembly comprises at least one telescopic rod, and the telescopic direction of the telescopic rod is perpendicular to the axis of the first rotating shaft. The auxiliary device can support the grinding wheel and assist operators in replacing the grinding wheel, manpower and time are saved, the grinding wheel replacing efficiency is improved, and the replacing difficulty is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of grinding wheel replacement, and particularly relates to an auxiliary device for replacing a grinding wheel. Background Art

[0002] During the use of a grinding wheel, due to wear and the need for the grinding wheel to adapt to the grinding processes of different workpieces, the grinding wheel needs to be frequently replaced or dressed, and the replacement frequency of the grinding wheel is relatively high. Moreover, the grinding wheel and the grinding wheel chuck of a grinding machine are relatively heavy, and multiple people are often required to cooperate during replacement (such as two people lifting and one person tightening bolts). This kind of operation is difficult to replace, not only consuming manpower, with a large labor intensity, but also having low efficiency, which may affect the production progress. Content of the Utility Model

[0003] The purpose of this application is to provide an auxiliary device for replacing a grinding wheel to solve the above technical problems existing in the prior art.

[0004] This application is implemented as follows:

[0005] An embodiment of this application provides an auxiliary device for replacing a grinding wheel, including a fixed base, a first rotating shaft, a connecting rod assembly, an adjusting seat, and a clamping member; the first rotating shaft is movably connected to the fixed base along its axial direction, one end of the first rotating shaft away from the fixed base is rotatably connected to the connecting rod assembly, the connecting rod assembly can rotate around the axis of the first rotating shaft, one end of the connecting rod assembly away from the first rotating shaft is rotatably connected to the adjusting seat, the rotation axis of the adjusting seat is parallel to the axis of the first rotating shaft, the clamping member is movably installed on the adjusting seat, the moving direction of the clamping member is parallel to the axis of the first rotating shaft, and the clamping member is used to connect the grinding wheel; the connecting rod assembly includes at least one telescopic rod, and the telescopic direction of the telescopic rod is perpendicular to the axis of the first rotating shaft.

[0006] The beneficial effect of this application is:

[0007] In this application, by setting the clamping member to connect the grinding wheel, the auxiliary device can support the grinding wheel and assist the operator in replacing the grinding wheel; the auxiliary device can replace manual labor, save manpower, save time, improve the grinding wheel replacement efficiency, and reduce the replacement difficulty.

[0008] In this application, by arranging the first rotating shaft to be rotationally engaged with the link assembly and arranging the adjusting seat to be rotationally engaged with the link assembly, on the cross-section of the first rotating shaft, the relative position between the clamping member connected to the adjusting seat and the fixed base can be flexibly adjusted to move the clamping member closer to the target position; and a link assembly is arranged, and the link assembly includes a telescopic rod with a variable length. By controlling the telescopic movement of the telescopic rod, the length of the link assembly is adjusted, thereby improving the flexibility of the position adjustment of the clamping member; it is also arranged that the first rotating shaft can move relative to the fixed base along its axial direction, and the clamping member can move relative to the adjusting seat along the axial direction of the first rotating shaft, and the position of the clamping member is adjusted in the axial direction of the first rotating shaft, further improving the flexibility of the position adjustment of the clamping member. Description of the Drawings

[0009] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments of the present invention or the description of the prior art. Obviously, the following described drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0010] Figure 1 is a schematic diagram of the overall structure of the auxiliary device provided by some embodiments of this application Figure 1 ;

[0011] Figure 2 is a schematic diagram of the overall structure of the auxiliary device provided by some embodiments of this application Figure 2 ;

[0012] Figure 3 is a schematic diagram of the structure of the fixed base provided by some embodiments of this application;

[0013] Figure 4 is a schematic diagram of the structure of the first rotating shaft provided by some embodiments of this application;

[0014] Figure 5 is a schematic diagram of a partial structure of the auxiliary device provided by some embodiments of this application Figure 1 ;

[0015] Figure 6 is a schematic diagram of a partial structure of the auxiliary device provided by some embodiments of this application Figure 2 ;

[0016] Figure 7 is a schematic diagram of the structure of the link assembly provided by some embodiments of this application.

[0017] In the figure: 100 - fixed base, 110 - insertion protrusion, 120 - fixed chassis, 130 - fixed shaft, 200 - first rotating shaft, 210 - insertion groove, 300 - connecting rod assembly, 310 - telescopic rod, 320 - second rotating shaft, 330 - third rotating shaft, 400 - adjusting seat, 410 - strip hole, 500 - clamping member, 510 - threaded hole, 520 - clamping cavity, 600 - locking nut, 700 - support screw, 800 - guide plate, 810 - guide cavity. Detailed implementation manners

[0018] The following description provides many different embodiments or examples for implementing different features of the present utility model. The elements and arrangements described in the following specific examples are only used to concisely express the present utility model, and they are only examples and not intended to limit the present utility model.

[0019] An embodiment of the present application provides an auxiliary device for replacing a grinding wheel. Refer to Figure 1 and Figure 2 As shown, the auxiliary device includes a fixed base 100, a first rotating shaft 200, a connecting rod assembly 300, an adjusting seat 400, and a clamping member 500.

[0020] The fixed base 100 is used to be fixed on the installation base, and the installation base can be the body base of an external cylindrical grinding machine or other bases that can be used to install the fixed base 100. The fixed base 100 is generally fixed to the installation base through connecting members such as bolts and screws.

[0021] The first rotating shaft 200 is movably connected to the fixed base 100 along its axial direction. The first rotating shaft 200 can move relative to the fixed base 100 along its axial direction to adjust the relative position between the first rotating shaft 200 and the fixed base 100. One end of the first rotating shaft 200 is movably connected to the fixed base 100, and the other end is the end far from the fixed base 100. This end is rotationally connected to the connecting rod assembly 300, and the connecting rod assembly 300 can rotate around the axis of the first rotating shaft 200 to change the position between the connecting rod assembly 300 and the first rotating shaft 200.

[0022] The end of the connecting rod assembly 300 far from the first rotating shaft 200 is rotationally connected to the adjusting seat 400. The rotation axis line of the adjusting seat 400 is parallel to the axis of the first rotating shaft 200. The clamping member 500 is used to clamp the grinding wheel, support the grinding wheel, and assist the operator in replacing the grinding wheel.

[0023] The clamping member 500 is movably arranged on the adjusting seat 400. The relative position between the clamping member 500 and the adjusting seat 400 is variable, and moreover, the moving direction of the clamping member 500 is arranged parallel to the axis of the first rotating shaft 200. By controlling the movement of the clamping member 500 relative to the adjusting seat 400, the position of the clamping member 500 in the axial direction of the first rotating shaft 200 is adjusted.

[0024] Both the clamping member 500 and the first rotating shaft 200 can adjust their positions in the axial direction of the first rotating shaft 200. In specific use, the axial direction of the first rotating shaft 200 is generally parallel to the direction of gravity. The first rotating shaft 200 and the clamping member 500 respectively adjust the overall height position of the auxiliary device at two ends of the auxiliary device. Control the movement of the first rotating shaft 200 to adjust the approximate position of the clamping member 500, and control the movement of the clamping member 500 to adjust the precise position of the clamping member 500. The two adjustment methods cooperate to improve the flexibility of adjusting the position of the clamping member 500 and also improve the accuracy of adjusting the position of the clamping member 500.

[0025] The connecting rod assembly 300 includes at least one telescopic rod 310. The telescopic rod 310 can be telescoped to change its overall length, and the telescopic direction of the telescopic rod 310 is perpendicular to the axis of the first rotating shaft 200. The telescopic movement of the telescopic rod 310 can change the overall length of the connecting rod assembly 300. The position of the fixed base 100 is fixed. By changing the length of the connecting rod assembly 300, the clamping member 500 is moved to a preset target position, facilitating the replacement of the target grinding wheel.

[0026] The auxiliary device provided by the embodiment of the present application can support the grinding wheel instead of the operator, thereby assisting the operator in replacing the grinding wheel. It can save the number of personnel required for replacing the grinding wheel and save labor. At the same time, the auxiliary device is more convenient to operate, can save the time required for replacing the grinding wheel, improve the replacement efficiency of the grinding wheel, reduce the replacement difficulty, and thus avoid affecting the normal operation of the grinding machine and the production progress of the production line due to the replacement of the grinding wheel. In addition, during the replacement process of the grinding wheel, the auxiliary device stably supports the grinding wheel, which can prevent the operator from being injured or the grinding wheel from being damaged by bumping to a certain extent.

[0027] The auxiliary device provided by the embodiment of the present application, by setting the first rotating shaft 200 to be rotationally matched with the connecting rod assembly 300, adjusts the position of the connecting rod assembly 300 in the circumferential direction of the first rotating shaft 200, and sets the adjusting seat 400 to be rotationally matched with the connecting rod assembly 300 to adjust the position of the adjusting seat 400 in the circumferential direction of the connecting rod assembly 300. Through rotational adjustment, the relative position between the clamping member 500 connected to the adjusting seat 400 and the fixed base 100 is flexibly adjusted in the cross-section of the first rotating shaft 200 to move the clamping member 500 closer to the target position. The connecting rod assembly 300 is provided. By changing the length of the connecting rod assembly 300, cooperating with the rotational adjustment of the connecting rod assembly 300 and the rotational adjustment of the adjusting seat 400, the flexibility of adjusting the position of the clamping member 500 is improved. In addition, the first rotating shaft 200 is also set to be movable relative to the fixed base 100 along its axial direction, and the clamping member 500 is set to be movable relative to the adjusting seat 400 along the axial direction of the first rotating shaft 200 to adjust the position of the clamping member 500 in the axial direction of the first rotating shaft 200, further improving the flexibility of adjusting the position of the clamping member 500.

[0028] The position of the snap-in part 500 has multiple adjustment directions, which improves the flexibility of adjusting the position of the snap-in part 500, and it is easier for the operator to adjust the snap-in part 500 to the target position.

[0029] In some embodiments of the present application, the first rotating shaft 200 and the fixed base 100 are threadedly connected to adjust the relative position between the first rotating shaft 200 and the fixed base 100. Refer to Figure 3 and Figure 4 As shown in the figure, one of the fixed base 100 and the first rotating shaft 200 is provided with a plugging protrusion 110, and the other is provided with a plugging groove 210. The outer surface of the plugging protrusion 110 is provided with an external thread, and the inner surface of the plugging groove 210 is provided with an internal thread. The plugging protrusion 110 is threadedly connected into the plugging groove 210. By the threaded connection between the plugging protrusion 110 and the plugging groove 210, the length of the threaded connection between the plugging protrusion 110 and the plugging groove 210 is adjusted, and the position of the first rotating shaft 200 is adjusted. Moreover, the first rotating shaft 200 is rotatably matched with the link assembly 300. Therefore, the first rotating shaft 200 can be rotated without affecting the link assembly 300 to adjust the relative position between the first rotating shaft 200 and the fixed base 100.

[0030] The plugging groove 210 and the plugging protrusion 110 are threadedly connected, and the connection between the two is stable. Moreover, the two in threaded cooperation can achieve stepless adjustment of the position of the first rotating shaft 200. In some preferred embodiments, a locking nut 600 is also threadedly connected outside the plugging protrusion 110, and the locking nut 600 is in abutting cooperation with the structure provided with the plugging groove 210, so as to further limit the position of the plugging protrusion 110 and improve the connection stability between the plugging protrusion 110 and the plugging groove 210.

[0031] In some specific embodiments, the fixed base 100 is divided into two parts. Refer to Figures 1 to 3 As shown in the figure, the fixed base 100 includes a fixed chassis 120 and a fixed shaft 130. The fixed chassis 120 is used to be fixed to the mounting base. One end of the fixed shaft 130 is fixedly connected to the fixed chassis 120, and the other end is provided with a plugging protrusion 110 or a plugging groove 210 and is connected to the first rotating shaft 200. The radial dimension of the fixed chassis 120 is larger than that of the fixed shaft 130. With such a setting, the supporting effect of the fixed chassis 120 on the fixed shaft 130 is better.

[0032] Refer to Figure 3 and Figure 4 As shown in the figure, the fixed shaft 130 is provided with a plugging protrusion 110, and the plugging groove 210 is provided on the first rotating shaft 200. In some other embodiments, it is also possible that the plugging protrusion 110 is provided on the first rotating shaft 200 and the plugging groove 210 is provided on the fixed shaft 130.

[0033] In some embodiments of the present application, the auxiliary device further includes a connecting bolt. Refer to Figure 1 and Figure 6 As shown, a strip-shaped hole 410 is provided on the adjusting seat 400, and the length direction of the strip-shaped hole 410 is parallel to the moving direction of the clamping member 500. The length direction of the strip-shaped hole 410 refers to the direction with a larger radial dimension in the cross-section of the strip-shaped hole 410. Refer to Figure 2 and Figure 5 As shown, the clamping member 500 is provided with a threaded hole 510, and the threaded hole 510 corresponds to the strip-shaped hole 410. The connecting bolt passes through the strip-shaped hole 410 and is threadedly connected to the threaded hole 510, and the head of the connecting bolt can abut against the surface of the adjusting seat 400, so as to fix the relative positions of the clamping member 500 and the adjusting seat 400. In the figure, the connecting bolt is not drawn.

[0034] By moving the clamping member 500 along the length direction of the strip-shaped hole 410, the relative positions of the clamping member 500 and the adjusting seat 400 are changed. The clamping member 500 can be adjusted in position within the length range of the strip-shaped hole 410. In Figure 5 and Figure 6 the connecting bolt is not drawn.

[0035] In some preferred embodiments of the present application, the auxiliary device further includes a support screw 700, and the support screw 700 is used to support the clamping member 500, and cooperate with the connecting bolt to further fix the relative positions of the clamping member 500 and the adjusting seat 400. Exemplarily, refer to Figure 2 and Figure 5 As shown, the support screw 700 is threadedly connected to the adjusting seat 400, and the support screw 700 is located on the side of the clamping member 500 close to the fixed base 100 and is used to abut against the clamping member 500. During the use of the auxiliary device, the support screw 700 is located below the gravity direction of the clamping member 500 and abuts against the clamping member 500. The support screw 700 can support the clamping member 500 to prevent the clamping member 500 from sliding down along the length direction of the strip-shaped hole 410. When the position of the clamping member 500 changes relative to the adjusting seat 400, the position of the support screw 700 can be adjusted by rotating the support screw 700 so that the support screw 700 can stably abut against the clamping member 500 and stably support the clamping member 500.

[0036] The clamping member 500 is generally directly clamped under the grinding wheel to support the grinding wheel. In some embodiments of the present application, refer to Figure 1 , Figure 2 , Figure 5 as well as Figure 6As shown, the clamping member 500 has a clamping cavity 520 penetrating through two end faces in its axial direction. The clamping cavity 520 has a first opening in its circumferential direction. The clamping member 500 is used for the grinding wheel to pass through. The first opening makes it more convenient for the grinding wheel to enter the clamping cavity 520. The clamping member 500 encloses the grinding wheel in the circumferential direction to provide support for the grinding wheel.

[0037] The auxiliary device further includes a guide plate 800. Refer to Figure 1 、 Figure 2 、 Figure 5 and Figure 6 As shown, the guide plate 800 is fixed to the clamping member 500 and moves along with the movement of the clamping member 500. The guide plate 800 has a guide cavity 810 penetrating through two end faces in its axial direction. The guide cavity 810 is coaxially arranged and communicated with the clamping cavity 520. The guide cavity 810 has a second opening in its circumferential direction. The guide cavity 810 is used for the grinding wheel to pass through. The guide plate 800 encloses the grinding wheel in the circumferential direction to provide support for the grinding wheel.

[0038] The radial dimension corresponding to the clamping cavity 520 is smaller than the radial dimension corresponding to the guide cavity 810. The grinding wheel generally includes several parts, such as the grinding wheel itself, the grinding wheel chuck, the flange plate, etc., and the radial dimensions of each part are different. The clamping member 500 and the guide plate 800 are respectively clamped to different positions of the grinding wheel to support different parts of the grinding wheel, increasing the contact area and acting points between the auxiliary device and the grinding wheel, and preventing the axis of the grinding wheel from tilting relative to the axis of the guide cavity 810, which may affect the installation and disassembly of the grinding wheel.

[0039] In some preferred embodiments, the central angle corresponding to the clamping cavity 520 is less than or equal to 180 degrees, and the central angle corresponding to the guide cavity 810 is greater than 180 degrees, which restricts the guide plate 800 and the clamping member 500 to be inserted and matched with the grinding wheel only along its axial direction. Moreover, after the guide plate 800 is clamped to the grinding wheel, the position of the guide plate 800 in its radial direction is restricted, preventing the clamping member 500 and the guide plate 800 from disengaging from the grinding wheel along its radial direction.

[0040] The radial dimension corresponding to the clamping cavity 520 is relatively small, and the radial dimension of the grinding wheel corresponding to it is also relatively small. By setting the central angle corresponding to the clamping cavity 520 to be less than or equal to 180 degrees, the clamping member 500 can be directly clamped to the position of the grinding wheel along its radial direction. The radial dimension corresponding to the guide cavity 810 is relatively large. By setting its corresponding central angle to be greater than 180 degrees, the size of the second opening corresponding to the guide cavity 810 can be made equal to the size of the first opening corresponding to the clamping cavity 520. The clamping member 500 and the guide plate 800 can be sleeved along the radial direction outside the same part of the grinding wheel, and then moved along the axial direction of the grinding wheel, so that the guide plate 800 is clamped outside its corresponding part of the grinding wheel, improving the flexibility of the cooperation between the grinding wheel and the auxiliary device.

[0041] The connecting rod assembly 300 is mainly used to adjust the distance between the clamping member 500 and the fixed chassis 120 in the horizontal direction. Refer to Figure 1 , Figure 2 and Figure 7 As shown, the connecting rod assembly 300 includes a second rotating shaft 320, a third rotating shaft 330 and two telescopic rods 310. The second rotating shaft 320 and the third rotating shaft 330 are both arranged in parallel with the first rotating shaft 200. One end of one telescopic rod 310 is rotatably connected to the first rotating shaft 200, and the other end is rotatably connected to the second rotating shaft 320. One end of the other telescopic rod 310 is rotatably connected to the second rotating shaft 320, and the other end is rotatably connected to the third rotating shaft 330. The third rotating shaft 330 is fixedly connected to the adjusting seat 400.

[0042] The root component includes two telescopic rods 310, and the two telescopic rods 310 are rotatably connected between them, so that its adjustment range is expanded and the flexibility of adjusting the position of the clamping member 500 is higher.

[0043] In some preferred embodiments, refer to Figure 1 and Figure 2 As shown, one end of one telescopic rod 310 is sleeved outside the first rotating shaft 200, and the other end is sleeved outside the second rotating shaft 320. One end of the other telescopic rod 310 is sleeved outside the second rotating shaft 320, and the other end is sleeved outside the third rotating shaft 330. The telescopic rod 310 is directly sleeved outside the rotating shaft, which increases the contact area between the telescopic rod 310 and the rotating shaft, thereby improving the connection stability between the telescopic rod 310 and the rotating shaft.

[0044] In some specific embodiments, the rotating shaft can be rotatably matched with the telescopic rod 310 by using a bearing to support the telescopic rod 310 and ensure smooth rotation of the telescopic rod 310 at the same time.

[0045] The second rotating shaft 320 is connected to two telescopic rods 310. In some embodiments, refer to Figure 1 , Figure 2 and Figure 7 As shown, the two telescopic rods 310 are respectively sleeved at both ends of the second rotating shaft 320. And, in the axial direction of the second rotating shaft 320, the telescopic rod 310 connected to the first rotating shaft 200 is arranged closer to the fixed chassis 120 than the telescopic rod 310 connected to the third rotating shaft 330. In the direction from the fixed chassis 120 to the clamping member 500, the height position of the telescopic rod 310 gradually increases. The overall adjustable height range of the auxiliary device is wider, and the overall support effect of the auxiliary device on the grinding wheel is also better.

[0046] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An auxiliary device for replacing a grinding wheel, characterized in that, It includes a fixed base (100), a first rotating shaft (200), a connecting rod assembly (300), an adjusting seat (400) and a clamping member (500); The first rotating shaft (200) is movably connected to the fixed base (100) along its axial direction. One end of the first rotating shaft (200) away from the fixed base (100) is rotatably connected to the connecting rod assembly (300). The connecting rod assembly (300) can rotate around the axis of the first rotating shaft (200). One end of the connecting rod assembly (300) away from the first rotating shaft (200) is rotatably connected to the adjusting seat (400). The rotation axis of the adjusting seat (400) is parallel to the axis of the first rotating shaft (200). The clamping member (500) is movably installed on the adjusting seat (400). The moving direction of the clamping member (500) is parallel to the axis of the first rotating shaft (200). The clamping member (500) is used to connect a grinding wheel; The connecting rod assembly (300) includes at least one telescopic rod (310). The telescopic direction of the telescopic rod (310) is perpendicular to the axis of the first rotating shaft (200).

2. The auxiliary device for replacing a grinding wheel according to claim 1, wherein, One of the fixed base (100) and the first rotating shaft (200) is provided with a plugging protrusion (110), and the other is provided with a plugging groove (210). The plugging protrusion (110) is threadedly connected in the plugging groove (210). A locking nut (600) is threadedly connected to the outside of the plugging protrusion (110).

3. An auxiliary device for replacing a grinding wheel according to claim 2, characterized in that, The fixed base (100) includes a fixed chassis (120) and a fixed shaft (130). One end of the fixed shaft (130) is fixedly connected to the fixed chassis (120), and the other end is provided with the plugging protrusion (110) or the plugging groove (210). The radial dimension of the fixed chassis (120) is larger than the radial dimension of the fixed shaft (130).

4. An auxiliary device for replacing a grinding wheel according to claim 1, characterized in that, The auxiliary device further includes a connecting bolt. The adjusting seat (400) is provided with a strip-shaped hole (410). The length direction of the strip-shaped hole (410) is parallel to the moving direction of the clamping member (500). The clamping member (500) is provided with a threaded hole (510). The connecting bolt passes through the strip-shaped hole (410) and is threadedly connected to the threaded hole (510). The head of the connecting bolt can be abutted against the surface of the adjusting seat (400) to fix the relative positions of the adjusting seat (400) and the clamping member (500).

5. The auxiliary device for replacing a grinding wheel according to claim 4, characterized in that, The auxiliary device further includes a support screw (700). The support screw (700) is threadedly connected to the adjusting seat (400). The support screw (700) is located on the side of the clamping member (500) close to the fixed base (100). The support screw (700) is used to abut against the clamping member (500).

6. The auxiliary device for replacing a grinding wheel according to claim 1, characterized in that, The clamping member (500) has a clamping cavity (520) penetrating through two end faces in its axial direction. The clamping cavity (520) has a first opening in its circumferential direction. The clamping cavity (520) is used for the grinding wheel to pass through; The auxiliary device further includes a guide plate (800). The guide plate (800) is fixed to the clamping member (500). The guide plate (800) has a guide cavity (810) penetrating through two end faces in its axial direction. The guide cavity (810) is coaxially arranged and communicated with the clamping cavity (520). The guide cavity (810) has a second opening in its circumferential direction. The guide cavity (810) is used for allowing a grinding wheel to pass through; The radial dimension corresponding to the clamping cavity (520) is smaller than the radial dimension corresponding to the guide cavity (810).

7. The auxiliary device for replacing a grinding wheel according to claim 6, characterized in that, The central angle corresponding to the clamping cavity (520) is less than or equal to 180 degrees, and the central angle corresponding to the guide cavity (810) is greater than 180 degrees.

8. An auxiliary device for replacing a grinding wheel according to claim 1, characterized in that, The link assembly (300) includes a second rotating shaft (320), a third rotating shaft (330), and two of the telescopic rods (310). The second rotating shaft (320) and the third rotating shaft (330) are both arranged parallel to the first rotating shaft (200); One end of one of the telescopic rods (310) is rotatably connected to the first rotating shaft (200), and the other end is rotatably connected to the second rotating shaft (320). The other telescopic rod (310) has one end rotatably connected to the second rotating shaft (320), and the other end rotatably connected to the third rotating shaft (330). The third rotating shaft (330) is fixedly connected to the adjusting seat (400).

9. An auxiliary device for replacing a grinding wheel according to claim 8, characterized in that, One end of one of the telescopic rods (310) is sleeved outside the first rotating shaft (200), and the other end is sleeved outside the second rotating shaft (320). The other telescopic rod (310) has one end sleeved outside the second rotating shaft (320), and the other end sleeved outside the third rotating shaft (330).

10. An auxiliary device for replacing a grinding wheel according to claim 9, characterized in that, The two telescopic rods (310) are respectively sleeved at both ends of the second rotating shaft (320). In the axial direction of the second rotating shaft (320), the telescopic rod (310) connected to the first rotating shaft (200) is arranged closer to the fixed base (100) than the telescopic rod (310) connected to the third rotating shaft (330).

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