CN210938788U

CN210938788U - Arc grinding wheel grinding equipment with variable grinding radius

Info

Publication number: CN210938788U
Application number: CN201921664292.3U
Authority: CN
Inventors: 赵薇
Original assignee: Jiangxi Xinlong Grinding Wheel Co ltd
Current assignee: Jiangxi Xinlong Grinding Wheel Co ltd
Priority date: 2019-10-08
Filing date: 2019-10-08
Publication date: 2020-07-07
Anticipated expiration: 2029-10-08

Abstract

The utility model discloses a grinding radius variable circular arc emery wheel grinding equipment, including the grinding base, hand wheel feed subassembly, sliding assembly, the sliding plate, two triangle pendulum blocks, two transmission levers, the grinding drive subassembly, grinding radius adjustment subassembly and the grinding head, be equipped with two circular arc holes on the sliding plate, two triangle pendulum blocks are all fixed with the spacer pin, two spacer pins correspond to imbed in two circular arc holes, the one end of two transmission levers is rotated respectively and is connected on one of them triangle pendulum block, the middle-end of two transmission levers is rotated respectively and is connected on another triangle pendulum block, grinding drive subassembly is used for driving the grinding head to swing back and forth, grinding radius adjustment subassembly rotates with the other end of two transmission levers and is connected; the utility model discloses can realize handling the coping of circular arc emery wheel, the coping radius of accessible coping radius adjusting part adjusting wheel bistrique again adapts to the coping demand of different circular arc emery wheels, and the coping radius is adjusted more accurately, and the coping precision is high, and the coping is efficient.

Description

Arc grinding wheel grinding equipment with variable grinding radius

Technical Field

The utility model relates to a circular arc emery wheel coping technical field especially relates to a changeable circular arc emery wheel coping equipment of coping radius.

Background

The existing grinding requirements of different arc grinding wheels are often manually moved to roughly adjust the grinding radius of the grinding head, so that the grinding precision is low and the grinding efficiency is low.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above shortcoming, provide a grinding radius changeable circular arc emery wheel coping equipment.

In order to achieve the above purpose, the specific scheme of the utility model is as follows:

an arc grinding wheel grinding device with a variable grinding radius comprises a grinding base, a hand wheel feeding assembly, two sliding assemblies fixed on the grinding base side by side, a sliding plate, two triangular swing blocks which are distributed at intervals and rotatably connected to the sliding plate, two E-shaped transmission levers, a grinding driving assembly, a grinding radius adjusting assembly and a grinding head; the sliding plate is connected to the sliding assembly in a sliding mode, and two arc holes are formed in the sliding plate at intervals corresponding to the two triangular swing blocks; the hand wheel feeding assembly is arranged at one end of the grinding base and is used for feeding the grinding head; limiting pins are fixed on the two triangular swing blocks, and the two limiting pins are correspondingly embedded into the two arc holes; one ends of the two transmission levers are respectively and rotatably connected to the triangular swing block close to the hand wheel feeding assembly, and the middle ends of the two transmission levers are respectively and rotatably connected to the triangular swing block far away from the hand wheel feeding assembly; the grinding driving component is arranged on the bottom surface of the sliding plate and is used for driving the grinding head to swing back and forth; the grinding head is fixed on the grinding radius adjusting component, and the grinding radius adjusting component is rotatably connected with the other ends of the two transmission levers and is used for adjusting the grinding radius of the grinding head.

In this embodiment, further, the grinding radius adjusting assembly includes a grinding radius adjusting seat, a first handle handwheel, a lead screw bracket, an adjusting lead screw and a radius adjusting slider, the grinding radius adjusting seat is rotatably connected with the other ends of the two transmission levers, the lead screw bracket is fixed at one end of the grinding radius adjusting seat, one end of the adjusting lead screw is rotatably connected with the lead screw bracket, the first handle handwheel is fixedly connected with one end of the adjusting lead screw, the radius adjusting slider is movably embedded in the grinding radius adjusting seat, the other end of the adjusting lead screw extends into the radius adjusting slider and is in threaded connection with the radius adjusting slider, and the grinding head is fixed at the other end of the radius adjusting slider.

In this embodiment, the grinding driving assembly further includes a grinding driving motor, a motor bracket, a driving main gear and a driven gear, the motor bracket is fixed on the bottom surface of the sliding plate, the grinding driving motor is fixed on the motor bracket, an output end of the grinding driving motor is fixedly connected with the driving main gear, and the driven gear is in transmission connection with one of the triangular swinging blocks and is meshed with the driving main gear.

In this embodiment, further, the driven gear is of a half gear structure.

In this embodiment, furthermore, the driving main gear is of a half-gear structure, the motor support is further rotatably connected with a transmission cylindrical gear, the triangular swing block close to the hand wheel feeding assembly is further fixedly connected with a direction-changing gear, the direction-changing gear is of a half-gear structure, and the transmission cylindrical gear is located between the driving main gear and the direction-changing gear and can be meshed with the driving main gear and the direction-changing gear.

In this embodiment, further, the hand wheel feeding assembly includes a second handle hand wheel, a pair of bearing seats fixed on the coping base at intervals, a screw rod, a nut, and an L-shaped connecting block, two ends of the screw rod are respectively rotatably connected to the bearing seats, the second handle hand wheel is fixedly connected to one end of the screw rod, the nut is in threaded connection with the screw rod, one end of the connecting block is fixedly sleeved on the nut, and the other end of the connecting block is fixed on the sliding plate.

The utility model has the advantages that: compared with the prior art, the utility model discloses set up the hand wheel and feed the feeding of subassembly adjustment and repair bistrique, then under the drive of coping drive assembly, under the cooperation transmission of triangle pendulum piece and transmission lever and the cooperation restriction of circular arc hole and spacer pin, make the bistrique be the circular arc orbit and swing back and forth, realize the coping processing to the circular arc emery wheel, and before the coping, the coping radius of adjustment and repair bistrique of accessible coping radius adjusting part adjustment, and then can adapt to the coping demand of different circular arc emery wheels, need not artifical manual removal and repair the bistrique, make the coping radius adjustment of coping head more accurate, the coping precision is higher, improve the efficiency of circular arc emery wheel coping, the suitability is stronger;

the two triangular swing blocks and the two transmission levers are arranged to be matched to drive the grinding head to swing, so that power transmission of the grinding driving assembly is achieved, the stability of the grinding radius adjusting assembly in the grinding process is improved, the grinding head is more stable to grind, and the grinding precision is guaranteed.

Drawings

Fig. 1 is a schematic structural diagram of an arc grinding wheel grinding device provided by an embodiment of the present invention;

fig. 2 is a schematic view of a partial structure of the arc grinding wheel grinding device provided by the embodiment of the present invention;

fig. 3 is a state diagram of the arc grinding wheel sharpening device provided by the embodiment of the present invention after swinging the sharpening head from one side to the other side;

fig. 4 is a schematic structural view of the grinding radius adjusting assembly and the grinding head provided in the embodiment of the present invention;

fig. 5 is a schematic structural diagram of a sharpening driving assembly provided in an embodiment of the present invention;

fig. 6 is a schematic structural view of the hand wheel feeding assembly installed on the grinding base according to the embodiment of the present invention;

description of reference numerals: 1-grinding the base; 2-a hand wheel feed assembly; 21-a second handle hand wheel; 22-a bearing seat; 23-a screw; 24-a nut; 25-connecting blocks; 3-a sliding assembly; 4-a sliding plate; 41-circular arc hole; 5-triangular swinging blocks; 6-a transmission lever; 7-grinding the driving component; 71-grinding a driving motor; 72-a motor mount; 73-driving the main gear; 74-driven gear; 75-a drive cylindrical gear; 76-a change gear; 8-grinding the radius adjusting component; 81-grinding radius adjusting seat; 82-a first handle handwheel; 83-screw rod bracket; 84-adjusting screw rod; 85-radius adjusting slide block; 9-grinding head; 10-limiting pin.

Detailed Description

The following detailed description of the present invention, taken in conjunction with the accompanying drawings and specific examples, is not intended to limit the scope of the invention.

As shown in fig. 1 to 6, the arc grinding wheel sharpening device with a variable sharpening radius according to the present embodiment includes a sharpening base 1, a hand wheel feeding assembly 2, two sliding assemblies 3 fixed side by side on the sharpening base 1, a sliding plate 4, two triangular swinging blocks 5 distributed at intervals and rotatably connected to the sliding plate 4, two E-shaped transmission levers 6, a sharpening driving assembly 7, a sharpening radius adjusting assembly 8 and a sharpening head 9; the sliding plate 4 is connected to the sliding assembly 3 in a sliding manner, two arc holes 41 are formed in the sliding plate 4 at intervals corresponding to the two triangular swing blocks 5, preferably, the two arc holes 41 are semicircular, and the application range is wider; the hand wheel feeding assembly 2 is arranged at one end of the grinding base 1 and is used for feeding the grinding head 9; the two triangular swing blocks 5 are both fixed with limiting pins 10, and the two limiting pins 10 are correspondingly embedded into the two arc holes 41; one ends of the two transmission levers 6 are respectively and rotatably connected to the triangular swing block 5 close to the hand wheel feeding assembly 2, and the middle ends of the two transmission levers 6 are respectively and rotatably connected to the triangular swing block 5 far away from the hand wheel feeding assembly 2; the coping driving component 7 is arranged on the bottom surface of the sliding plate 4 and is used for driving the coping head 9 to swing back and forth; the grinding head 9 is fixed on the grinding radius adjusting component 8, and the grinding radius adjusting component 8 is rotatably connected with the other ends of the two transmission levers 6 and is used for adjusting the grinding radius of the grinding head 9. In this embodiment, be equipped with on the coping base 1 and dodge the groove, should dodge the groove and be used for providing installation space and remove space for coping radius adjusting part 8, the structure is compacter, small.

Specifically, one vertex angle of each of the two triangular swing blocks 5 is rotatably connected to the sliding plate 4 through a connecting pin, one end of each of the two transmission levers 6 is rotatably connected to the other two vertex angles of the triangular swing block 5 close to the hand wheel feeding assembly 2 through a connecting pin, the middle ends of the two transmission levers 6 are rotatably connected to the other two vertex angles of the triangular swing block 5 far away from the hand wheel feeding assembly 2 through connecting pins, and the output end of the grinding driving assembly 7 is in transmission connection with the triangular swing block 5 far away from the hand wheel feeding assembly 2 through a connecting pin;

when in use, firstly, the datum adjustment is carried out, the grinding driving component 7 drives the triangular swing block 5 far away from the hand wheel feeding component 2 to rotate, the triangular swing block 5 drives the limiting pin 10 to move along the arc hole 41, the moving range of the limiting pin 10 is limited by the arc hole 41, the maximum moving range is from one end of the arc hole 41 to the other end, and further the rotating range of the triangular swing block 5 can be limited, meanwhile, the triangular swing block 5 drives the two transmission levers 6 to swing through the connecting pin, the two transmission levers 6 can drive the other triangular swing block 5 to swing, the other triangular swing block 5 also drives the limiting pin 10 to move along the arc hole 41, meanwhile, the two transmission levers 6 can drive the grinding radius adjusting component 8 to swing, and the grinding head 9 is arranged on the grinding radius adjusting component 8, therefore, the grinding head 9 can also swing along with the two transmission levers 6, and the swinging track is arc, then the grinding head 9 can be deviated to one side, then the hand wheel feeding component 2 drives the sliding plate 4 to move to realize the feeding of the grinding head 9, the arc grinding wheel is arranged on the grinding machine, the arc grinding wheel rotates at high speed under the driving of the grinding machine, then the arc grinding wheel grinding equipment of the embodiment is placed on one side of the grinding machine, the swinging plane of the grinding head 9 is perpendicular to the rotating plane of the arc grinding wheel, then the hand wheel feeding component 2 continues to drive the grinding head 9 to move slowly until the tip of the grinding head 9 is just contacted with the arc grinding wheel, then the point is taken as the zero point, as the grinding head 9 is contacted with the arc grinding wheel, sand particles fly out, whether the grinding head 9 is contacted with the arc grinding wheel can be judged, then the grinding driving component 7 drives the grinding head 9 to move to the back of the arc grinding wheel by the distance of a half arc grinding wheel according to the thickness of the arc grinding wheel, at the moment, the central plane of the circular arc grinding wheel can be determined, so that the reference adjustment is completed;

after the reference adjustment and calibration are completed, according to the actual required polishing degree, the polishing radius of the polishing head 9 can be adjusted through the polishing radius adjusting component 8, so that the polishing treatment can be performed on different arc grinding wheels, then the polishing head 9 swings back and forth along an arc track under the driving of the polishing driving component 7, the arc grinding wheels rotate at a high speed under the driving of the grinding machine, and the arc grinding wheels can be automatically polished by the polishing head 9.

In the embodiment, the hand wheel feeding component 2 is arranged to adjust and repair the feeding of the grinding head 9, then the grinding head 9 swings back and forth along an arc track under the driving of the grinding driving component 7, the matching transmission of the triangular swing block 5 and the transmission lever 6 and the matching limitation of the arc hole 41 and the limiting pin 10, so that the grinding head 9 can grind the arc grinding wheel, before grinding, the grinding radius of the grinding head 9 can be adjusted through the grinding radius adjusting component 8, the grinding requirements of different arc grinding wheels can be met, the grinding head 9 does not need to be manually moved, the grinding radius of the grinding head 9 can be adjusted more accurately, the grinding precision is higher, the grinding efficiency of the arc grinding wheel is improved, and the applicability is higher.

The two triangular swing blocks 5 and the two transmission levers 6 are arranged to be matched with each other to drive the grinding head 9 to swing, so that power transmission of the grinding driving assembly 7 is achieved, the stability of the grinding radius adjusting assembly 8 in the grinding process is improved, the grinding head 9 is more stable in grinding, and grinding precision is guaranteed.

In this embodiment, preferably, the sliding assembly 3 includes a linear sliding rail and a sliding block, the linear sliding rail is fixedly installed on two sides of the avoiding groove of the coping base 1, the sliding block is slidably connected to the linear sliding rail, and two sides of the bottom surface of the sliding plate 4 are respectively and fixedly connected to the sliding block; specifically, under the drive of the hand wheel feeding assembly 2, the sliding plate 4 slides along the linear sliding rail under the action of the sliding block, so that the grinding head 9 is fed, and the manufacturing cost is low.

Based on the above embodiment, as shown in fig. 1 to 4, the grinding radius adjusting assembly 8 includes a grinding radius adjusting seat 81, a first handle handwheel 82, a lead screw bracket 83, an adjusting lead screw 84 and a radius adjusting slider 85, the grinding radius adjusting seat 81 is rotatably connected with the other ends of the two transmission levers 6, the lead screw bracket 83 is fixed at one end of the grinding radius adjusting seat 81, one end of the adjusting lead screw 84 is rotatably connected with the lead screw bracket 83 through a bearing, the first handle handwheel 82 is fixedly connected with one end of the adjusting lead screw 84, the radius adjusting slider 85 is movably embedded in the grinding radius adjusting seat 81, the other end of the adjusting lead screw 84 extends into the radius adjusting slider 85 and is in threaded connection with the radius adjusting slider 85, and the grinding head 9 is fixed at the other end of the radius adjusting slider 85; specifically, the two sides of the grinding radius adjusting seat 81 are respectively extended with a lug, the two lugs are respectively rotatably connected with the other ends of the two transmission levers 6 through a pin shaft, when the grinding radius adjusting seat 81 is operated, the pin shaft moves along with the transmission levers 6 and pushes the grinding radius adjusting seat 81 to move, the grinding radius adjusting seat 81 rotates by taking the two pin shafts as a rotating shaft due to the change of the relative position of the two transmission levers 6, the position of the grinding head 9 is adjusted and repaired, when the grinding radius of the grinding head 9 needs to be adjusted and repaired, the first handle 82 is manually and slowly shaken, the first handle 82 drives the adjusting screw rod 84 to rotate, the radius adjusting slide block 85 slides by the rotation of the adjusting screw rod 84, so as to adjust and repair the grinding radius of the grinding head 9, the first handle 82 and the adjusting screw rod 84 are matched for transmission, the grinding radius of the grinding head 9 is more conveniently adjusted and more flexibly controlled, and the screw thread self-locking function of the adjusting, the grinding head 9 can be prevented from shaking in the grinding process, the structure is more reliable, and the manufacturing cost is low.

Based on the above embodiment, as shown in fig. 2 and 5, the thinning driving assembly 7 includes a thinning driving motor 71, a motor bracket 72, a driving main gear 73 and a driven gear 74, the motor bracket 72 is fixed on the bottom surface of the sliding plate 4, the thinning driving motor 71 is fixed on the motor bracket 72, the output end of the thinning driving motor 71 is fixedly connected with the driving main gear 73, and the driven gear 74 is in transmission connection with the triangular swing block 5 far away from the handwheel feeding assembly 2 and is meshed with the driving main gear 73; specifically, the motor bracket 72 is also provided with an avoiding groove for providing an installation space for the driving main gear 73 and the driven gear 74, namely, the driving main gear 73 and the driven gear 74 are positioned in the avoiding groove, the coping driving motor 71 is fixed on the bottom surface of the motor bracket 72, the output end of the coping driving motor passes through the motor bracket 72 and then is fixedly connected with the driving main gear 73, the driven gear 74 is fixedly connected on a connecting pin of the triangular swing block 5 far away from the handwheel feeding component 2 and is meshed with the driving main gear 73, when in operation, the coping driving motor 71 drives the driving main gear 73 to rotate, the driving main gear 73 drives the connecting pin to rotate, the connecting pin drives the triangular swing block 5 to rotate, the triangular swing block 5 drives the two transmission levers 6 to swing and the other triangular swing block 5 to rotate, so that the coping head 9 deviates from one side to the other side, and then the coping driving motor 71 rotates reversely, the grinding head 9 is driven to swing back to one side from the other side, so that the grinding head 9 can be provided with power for swinging back and forth. In this embodiment, the driven gear 74 preferably has a half-gear structure, and the half-gear structure is lower in processing cost than the cylindrical gear structure, and can further reduce the manufacturing cost.

Based on the above embodiment, further, as shown in fig. 5, the driving main gear 73 is of a half-gear structure, two teeth on the driving main gear 73 at the edge end are cut off to facilitate the matching between the driving main gear 73 and the driven gear 74, a transmission cylindrical gear 75 is rotatably connected to the motor bracket 72, a direction changing gear 76 is connected to the other end of the connecting pin connected to the triangular swing block 5 close to the handwheel feeding assembly 2, the direction changing gear 76 is of a half-gear structure, and the transmission cylindrical gear 75 is located between the direction changing gear 76 and the driving main gear 73 and can be meshed with the direction changing gear 76 and the driving main gear 73; specifically, during installation, the teeth of the driving main gear 73 and the teeth of the driven gear 74 are in the same direction, and the teeth of the change gear 76 and the teeth of the driven gear 74 are in opposite directions, when in use, as shown in fig. 1 and 3, if the sharpening head 9 swings from one side to the other side, the sharpening driving motor 71 drives the driving main gear 73 to rotate, the driving main gear 73 drives the driven gear 74 to rotate but does not drive the transmission cylindrical gear 75 to rotate, the driven gear 74 indirectly drives the change gear 76 to rotate in the same direction through the triangular swing block 5 and the transmission lever 6, the rotation of the change gear 76 drives the transmission cylindrical gear 75 to rotate until the sharpening head 9 swings from one side to the other side, at this time, the driving main gear 73 and the driven gear 74 are no longer meshed, the driven gear 74 cannot be driven to rotate, and under the continued driving of the sharpening driving motor 71, the driving main gear 73 is meshed with the transmission cylindrical gear 75, the transmission cylindrical gear 75 is driven to rotate, the transmission cylinder can drive the change gear 76 to rotate reversely (namely, the direction is opposite to the direction in which the change gear 76 is driven by the driven gear 74), the change gear 76 can drive the triangular swing block 5 and the transmission lever 6 to swing, and then the driven gear 74 is indirectly driven to rotate, so that the grinding head 9 swings to one side from the other side, then the grinding driving motor 71 is driven continuously, the driving main gear 73 can drive the driven gear 74 to rotate, the process is repeated, the grinding head 9 can still swing back and forth under the condition that the grinding driving motor 71 does not change the rotating direction, the reversing of the grinding driving motor 71 is not needed, the grinding efficiency of the arc grinding wheel is improved, meanwhile, the grinding driving motor 71 is protected, and the problem that the grinding driving motor 71 is burnt due to frequent reversing is avoided.

Based on the above embodiment, as shown in fig. 6, the hand wheel feeding assembly 2 includes a second handle hand wheel 21, a pair of bearing seats 22 fixed to the coping base 1 at intervals, a screw 23, a nut 24, and an L-shaped connecting block 25, both ends of the screw 23 are respectively rotatably connected to the bearing seats 22, the second handle hand wheel 21 is fixedly connected to one end of the screw 23, the nut 24 is screwed to the screw 23, one end of the connecting block 25 is fixedly sleeved on the nut 24, and the other end of the connecting block 25 is fixed to the sliding plate 4; specifically, the two ends of the screw 23 are respectively connected to the bearing seats 22 through bearings in a rotating mode, during operation, the second handle hand wheel 21 is manually shaken, the second handle hand wheel 21 drives the screw 23 to rotate, the nut 24 moves along the screw 23 due to rotation of the screw 23, the nut 24 drives the connecting block 25 to move, and the connecting block 25 drives the sliding plate 4 to move, so that feeding of the grinding head 9 can be achieved, operation is convenient, control is flexible, and cost is low.

The above is only a preferred embodiment of the present invention, so all the equivalent changes or modifications made by the structure, features and principles in accordance with the claims of the present invention are included in the protection scope of the present invention.

Claims

1. The arc grinding wheel grinding equipment with the variable grinding radius is characterized by comprising a grinding base (1), a hand wheel feeding assembly (2), two sliding assemblies (3) fixed on the grinding base (1) side by side, a sliding plate (4), two triangular swinging blocks (5) which are distributed at intervals and rotatably connected on the sliding plate (4), two E-shaped transmission levers (6), a grinding driving assembly (7), a grinding radius adjusting assembly (8) and a grinding head (9); the sliding plate (4) is connected to the sliding assembly (3) in a sliding mode, and two arc holes (41) are formed in the sliding plate (4) at intervals corresponding to the two triangular swing blocks (5); the hand wheel feeding assembly (2) is installed at one end of the grinding base (1) and is used for feeding the grinding head (9); limiting pins (10) are fixed on the two triangular swing blocks (5), and the two limiting pins (10) are correspondingly embedded into the two arc holes (41); one ends of the two transmission levers (6) are respectively and rotatably connected to a triangular swing block (5) close to the hand wheel feeding assembly (2), and the middle ends of the two transmission levers (6) are respectively and rotatably connected to a triangular swing block (5) far away from the hand wheel feeding assembly (2); the grinding driving component (7) is arranged on the bottom surface of the sliding plate (4) and is used for driving the grinding head (9) to swing back and forth; the grinding head (9) is fixed on the grinding radius adjusting component (8), and the grinding radius adjusting component (8) is rotatably connected with the other ends of the two transmission levers (6) and is used for adjusting the grinding radius of the grinding head (9).

2. The arc grinding wheel grinding equipment with the variable grinding radius according to claim 1, wherein the grinding radius adjusting component (8) comprises a grinding radius adjusting seat (81), a first handle hand wheel (82), a lead screw bracket (83), an adjusting lead screw (84) and a radius adjusting slide block (85), the grinding radius adjusting seat (81) is rotatably connected with the other ends of the two transmission levers (6), the lead screw bracket (83) is fixed at one end of the grinding radius adjusting seat (81), one end of the adjusting lead screw (84) is rotatably connected with the lead screw bracket (83), the first handle hand wheel (82) is fixedly connected with one end of the adjusting lead screw (84), the radius adjusting slide block (85) is movably embedded in the grinding radius adjusting seat (81), and the other end of the adjusting lead screw (84) extends into the radius adjusting slide block (85), and is in threaded connection with the radius adjusting slide block (85), and the grinding head (9) is fixed at the other end of the radius adjusting slide block (85).

3. The arc grinding wheel sharpening device with the variable sharpening radius according to claim 1, wherein the sharpening driving assembly (7) comprises a sharpening driving motor (71), a motor bracket (72), a driving main gear (73) and a driven gear (74), the motor bracket (72) is fixed on the bottom surface of the sliding plate (4), the sharpening driving motor (71) is fixed on the motor bracket (72), the output end of the sharpening driving motor (71) is fixedly connected with the driving main gear (73), and the driven gear (74) is in transmission connection with one of the triangular swinging blocks (5) and is meshed with the driving main gear (73).

4. The apparatus for grinding round grinding wheels with variable grinding radius according to claim 3, characterized in that the driven gear (74) is of a half-gear structure.

5. The arc grinding wheel sharpening device for the variable sharpening radius according to claim 4, wherein the driving main gear (73) is of a half-gear structure, the motor support (72) is further rotatably connected with a transmission cylindrical gear (75), the triangular swing block (5) close to the hand wheel feeding assembly (2) is further fixedly connected with a change gear (76), the change gear (76) is of a half-gear structure, and the transmission cylindrical gear (75) is located between the driving main gear (73) and the change gear (76) and can be meshed with the driving main gear (73) and the change gear (76).

6. The arc grinding wheel grinding device with the variable grinding radius according to claim 1, wherein the hand wheel feeding assembly (2) comprises a second handle hand wheel (21), a pair of bearing seats (22) fixed on the grinding base (1) at intervals, a screw rod (23), a nut (24) and an L-shaped connecting block (25), two ends of the screw rod (23) are respectively and rotatably connected to the bearing seats (22), the second handle hand wheel (21) is fixedly connected with one end of the screw rod (23), the nut (24) is in threaded connection with the screw rod (23), one end of the connecting block (25) is fixedly sleeved on the nut (24), and the other end of the connecting block (25) is fixed on the sliding plate (4).