CN107627213B

CN107627213B - Tool holder device for tool grinder

Info

Publication number: CN107627213B
Application number: CN201710885201.8A
Authority: CN
Inventors: 赵春利; 李文博; 陶成; 李星; 于金祥
Original assignee: Beijing Hyundai Motor Co Ltd
Current assignee: Beijing Hyundai Motor Co Ltd
Priority date: 2017-09-26
Filing date: 2017-09-26
Publication date: 2024-03-01
Anticipated expiration: 2037-09-26
Also published as: CN107627213A

Abstract

The present disclosure relates to a tool holder device for a tool grinder, comprising: a holder main body (10); a connecting and positioning part (20) connected to the lower part of the bracket main body (10) and used for fixing the cutter bracket device on a cutter grinder (60); a tool support (30) movably connected to the holder body (10) for supporting a tool (70); and an operation unit (40) connected to the holder body (10) for driving the tool support unit (30) to move up and down with respect to the holder body (10). The cutter bracket device can apply supporting force to the slender cutter when the cutter is polished, so that the slender cutter is prevented from being broken due to vibration, and the cutter is prevented from breaking and damaging the grinding wheel.

Description

Tool holder device for tool grinder

Technical Field

The present disclosure relates to the field of machining, and in particular, to a tool holder device for a tool grinder.

Background

In the production process of automobile parts, various parts are machined by utilizing various machine tools, various cutters on the machine tools become dull after being used for a long time, and at the moment, the cutters need to be polished by a cutter grinder so that the cutters can be used continuously. Among them, when a five-axis numerical control grinding machine is used to grind an elongated tool (e.g., a drill, a reamer, etc.), the grinding amount and the feeding amount of the grinding machine work need to be reduced to a small amount. Even so, because the slender cutter is clamped to the workbench, the part of the slender cutter extending out of the clamp is longer, the cutter rigidity is poor, the slender cutter is easy to vibrate and break during grinding, the grinding wheel is easy to collapse and damage during the breaking of the slender cutter, the grinding wheel is damaged and abandoned, the sharpening cost is increased, the grinding wheel is required to be replaced, the labor intensity is increased, and the grinding efficiency is low.

Disclosure of Invention

It is an object of the present disclosure to provide a tool holder device for a tool grinder, which is capable of applying a supporting force to an elongated tool when the tool is ground, preventing the elongated tool from being broken due to vibration, and avoiding the breakage of the tool from damaging a grinding wheel.

To achieve the above object, the present disclosure provides a tool holder apparatus for a tool grinder, comprising: a holder main body; the connecting and positioning part is connected below the bracket main body and used for fixing the cutter bracket device on a cutter grinding machine; a cutter supporting part movably connected to the bracket body for supporting a cutter; and the operation part is connected with the bracket main body and used for driving the cutter supporting part to move up and down relative to the bracket main body.

Optionally, the operation portion includes handle, connecting plate and backup pad, the handle through first round pin axle articulated in the support main part, the backup pad through the second round pin axle articulated in the support main part, the axis of first round pin axle with the axis of second round pin axle is parallel, the handle has operation end and link, the operation end with distance between the first round pin axle is greater than link with distance between the first round pin axle, the backup pad has input and drive end, the drive end with cutter supporting part links to each other, the input with distance between the second round pin axle is greater than the drive end with distance between the second round pin axle, the both ends of connecting plate articulate respectively in link with the input.

Optionally, the operation part further includes a first spring, an upper end of the first spring is connected to a portion of the support plate between the input end and the second pin shaft, and a lower end of the first spring is connected to the bracket body.

Optionally, the support plate is in a shape of a v, and the second pin shaft is disposed at an inflection of the support plate.

Optionally, the support main body includes bottom, installation base member portion and wedge adjusting block, connect the locating part and connect the below of bottom, installation base member portion is located the top of bottom, operating means with the cutter supporting part connect in installation base member portion, installation base member portion with form the gap between the bottom and the two link to each other in being provided with one side of cutter supporting part, the wedge adjusting block inserts in the gap, be used for the adjustment install base member portion with contained angle between the bottom.

Optionally, the bracket main body further includes a positioning block and a positioning pin, the positioning block is connected to the bottom, and the positioning pin passes through the positioning block to prop against the mounting base portion, so as to apply a downward force to the mounting base portion, so that the wedge-shaped adjusting block is clamped in the gap.

Optionally, the connection location portion includes two at least connecting blocks and mutually supporting adjusting bolt and lock nut, the connecting block clearance fit with the mounting groove on the cutter grinding machine, the lower extreme of locating piece extends beyond the lower surface of bottom, the screw hole that the level extends has been seted up to the lower extreme of locating piece, adjusting bolt passes the screw hole is in order to support to the cutter grinding machine on.

Optionally, the tool support device further includes a limiting portion, where the limiting portion is disposed at an upper end of the support body and is used for limiting an upper limit position of the tool support portion.

Optionally, the limiting part comprises a limiting block and a third pin shaft, the axis of the third pin shaft is parallel to the axis of the first pin shaft, the limiting block is hinged on the bracket main body through the third pin shaft, the limiting block is provided with a limiting end, and the limiting end is matched with the top end of the cutter supporting part.

Optionally, the tool support portion includes a tool support block and a V-shaped support block that are connected to each other, the tool support block being connected to the support plate, the V-shaped support block being for placing a tool.

Optionally, a first guiding inclined plane extending upwards is formed at the upper end of the cutter supporting block, and a second guiding inclined plane extending downwards is formed at the limiting end of the limiting block.

Optionally, the driving end of the supporting plate is provided with a groove, the cutter supporting block is provided with a mounting pin, the mounting pin is lapped on the groove, and the cutter supporting block is connected with the bracket main body through a second spring.

According to the technical scheme, the cutter support device is fixedly arranged on the cutter grinding machine through the connecting and positioning part, so that the cutter support part is positioned below the cutter to support the front end of the cutter, and the rigidity of the slender cutter is improved. Because the cutter grinder can apply great grinding force to the cutter when grinding the cutter, the cutter especially the cutter of slender shape is easy to break because of vibration, consequently the cutter supporting part of this disclosure can apply appropriate holding force to the slender cutter when grinding the cutter, prevents that the slender cutter from breaking because of the vibration that produces when grinding the emery wheel, also avoids the cutter fracture to break up the emery wheel simultaneously, improves the processing security. In addition, the operation portion is operated to move the tool support portion up and down with respect to the holder main body to move the tool support portion away from or close to the tool, so that the tool can be mounted or exchanged.

Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure. In the drawings:

FIG. 1 is a front view of a tool holder apparatus for a tool grinder in accordance with an embodiment of the present disclosure;

FIG. 2 is a perspective view of a tool holder apparatus for a tool grinder in accordance with an embodiment of the present disclosure;

FIG. 3 is a mounting diagram of a tool holder apparatus for a tool grinder in accordance with an embodiment of the present disclosure;

FIG. 4 is a front view of a support plate of a tool holder apparatus for a tool grinding machine in accordance with an embodiment of the present disclosure;

FIG. 5 is a front view of a tool support block of a tool support device for a tool grinding machine in accordance with an embodiment of the present disclosure;

fig. 6 is a front view of a stopper of a tool holder apparatus for a tool grinder in accordance with an embodiment of the present disclosure.

Description of the reference numerals

10. The bottom of the bracket main body 11

12. Wedge-shaped adjusting block for mounting base body part 13

14. Gap 15 positioning block

16. Positioning pin

20. Connecting block of connecting and positioning part 21

22. Adjusting bolt 23 lock nut

30. Tool support 31 tool support block

311 first guide ramp 312 mounting pin

32 V-shaped support block 33 second spring

40. Handle of operation part 41

411 operation end 412 connection end

42. Connecting plate 43 supporting plate

431 input 432 drive

433 groove 44 first pin

45. Second pin 46 first spring

50. Limiting part 51 limiting block

511 limit end 512 second guiding inclined plane

52. Third pin shaft

60. Mounting groove of cutter grinder 61

70. Cutting tool

Detailed Description

Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure.

In the present disclosure, unless otherwise stated, terms such as "up, down, left, right, front, and rear" are used to generally refer to the vertical direction in fig. 1 as "up-down direction", the horizontal direction as "left-right direction", and the direction perpendicular to the paper surface as "front-rear direction".

As shown in fig. 1 to 3, an embodiment of the present disclosure provides a tool holder apparatus for a tool grinder, including: a holder main body 10; a connection positioning portion 20 connected to the lower side of the holder body 10 for fixing the tool holder device to the tool grinder 60; a cutter supporting portion 30 movably connected to the holder body 10 for supporting the cutter 70; an operation portion 40 connected to the holder body 10 for driving the tool support portion 30 to move up and down with respect to the holder body 10.

The tool holder apparatus is fixedly mounted to the tool grinder 60 through the connection location portion 20 such that the tool support portion 30 is positioned below the tool 70 to support the front end of the tool 70 (e.g., one end of the tool 70 protrudes from the tool support portion 30 by about 10 mm), thereby enhancing the rigidity of the elongated tool 70. Since the cutter grinder 60 applies a large grinding force to the cutter 70 when grinding the cutter 70, particularly, an elongated cutter is easily broken by vibration, the cutter support portion 30 of the present disclosure can apply an appropriate supporting force to the elongated cutter 70 when grinding the cutter 70, prevent the elongated cutter 70 from being broken by vibration generated when grinding the grinding wheel, and also prevent the cutter 70 from breaking and chipping the grinding wheel, thereby improving the processing safety. In addition, the operating portion 40 is operated to move the tool supporting portion 30 up and down with respect to the holder body 10 so that the tool supporting portion 30 is away from or close to the tool 70, thereby enabling the tool 70 to be mounted or replaced, and facilitating the tool mounting and replacement operations.

Referring to fig. 1 to 3, as an embodiment of the operation part 40, alternatively, the operation part 40 includes a handle 41, a connection plate 42, and a support plate 43, the handle 41 is hinged to the support body 10 through a first pin 44, the support plate 43 is hinged to the support body 10 through a second pin 45, an axis of the first pin 44 is parallel to an axis of the second pin 45, the handle 41 has an operation end 411 and a connection end 412, a distance between the operation end 411 and the first pin 44 is greater than a distance between the connection end 412 and the first pin 44, the support plate 43 has an input end 431 and a driving end 432, the driving end 432 is connected to the cutter supporting part 30, a distance between the input end 431 and the second pin 45 is greater than a distance between the driving end 432 and the second pin 45, and both ends of the connection plate 42 are respectively hinged to the connection end 412 and the input end 431.

The operation end 411 and the connection end 412 of the handle 41 are formed as both ends of the lever with the first pin 44 as a fulcrum, and the input end 431 and the driving end 432 of the support plate 43 are also formed as both ends of the lever with the second pin 45 as a fulcrum, and the handle 41, the connection plate 42, and the support plate 43 are sequentially connected to form a link mechanism to transmit the movement of the operation end 41. For example, when the tool 70 is mounted or replaced, the handle 41, i.e., the operating end 411, is pressed downward to move the input end 431 upward, so that the driving end 43 is driven to move downward by the connecting plate 42 and the supporting plate 43, and the driving end 432 drives the tool supporting part 30 to move downward relative to the bracket body 10 to disengage from the tool 70, at which time a new tool can be replaced or mounted after the tool 70 is removed; then, the handle 41 is released, the respective members are reset to the initial positions, the cutter supporting portion 30 is again brought into contact with the cutter 70 and supports the cutter, and the cutter mounting and replacement operations are convenient and quick.

As shown in fig. 1 to 3, in order to facilitate the return of the operation part 40, the operation part 40 may optionally further include a first spring 46, an upper end of the first spring 46 being connected to a portion of the support plate 43 between the input end 431 and the second pin 45, and a lower end being connected to the bracket body 10. The first spring 46 applies a downward tension to the side of the input end 431 of the support plate 43, so that the driving end 432 of the support plate 43 applies an upward supporting force to the tool support 30, and the tool support 30 can withstand the pressure applied thereto by the tool 70 during grinding. The support plate 43 is tensioned by the first spring 46 to ensure that the tool support 30 has sufficient force to support the tool 70 during machining. In addition, when the cutting force or the cutting amount is excessively large during the machining of the tool, flexible support of the tool in the coping by the tool support portion 30 is achieved by the support plate 43 and the first spring 46.

The support plate 43 may be of various suitable shapes, as shown in fig. 4, alternatively the support plate 43 is in a 'v' shape, and the second pin 45 is disposed at the inflection of the support plate 43. Since the input end 431 and the driving end 432 of the support plate 43 are formed as both ends of the lever with the second pin 45 as a fulcrum, both side portions of the inflection portion extend upward, so that the operation portion 40 is compact in structure, and easy to arrange on the stand main body 10, resulting in compact overall structure.

To adjust the stand body 10, referring to fig. 1 to 3, alternatively, the stand body 10 includes a bottom 11, a mounting base portion 12 and a wedge-shaped adjusting block 13, a connection positioning portion 20 is connected below the bottom 11, the mounting base portion 12 is located above the bottom 11, an operating portion 40 and a tool supporting portion 30 are connected to the mounting base portion 12, a gap 14 is formed between the mounting base portion 12 and the bottom 11 and both are connected at a side where the tool supporting portion 30 is disposed, and the wedge-shaped adjusting block 13 is inserted into the gap 14 for adjusting an included angle between the mounting base portion 12 and the bottom 11. The wedge-shaped adjustment block 13 has a wedge-shaped cross section in the front-rear direction, and the wedge-shaped adjustment block 13 can be moved in the front-rear direction to increase or decrease the depth of insertion of the wedge-shaped adjustment block 13 into the slit 14, thereby increasing or decreasing the distance between the bottom portion 11 and the mounting base portion 12 at the slit 14, resulting in tilting the mounting base portion 12 right or left with respect to the bottom portion 11. Further, to adjust the position of the tool support 30 mounted on the mounting base portion 12 relative to the tool 70 so that the tool support 30 better accommodates and supports the tool 70.

As shown in fig. 1 to 3, in order to position the wedge-shaped adjustment block 13, optionally, the bracket body 10 further includes a positioning block 15 and a positioning pin 16, the positioning block 15 is connected to the bottom 11, and the positioning pin 16 passes through the positioning block 15 to abut against the mounting base portion 12 to apply a downward force to the mounting base portion 12, so that the wedge-shaped adjustment block 13 is clamped in the slit 14. The positioning block 15 is fixed to the bottom 11 by two bolts at the sides thereof, and the positioning pin 16 is screwed on the positioning block 15 and abuts against the mounting base portion 12, so that the wedge-shaped adjustment block 13 is pressed against the bottom 11 without being moved back and forth, whereby the angle between the bottom 11 and the mounting base portion 12 is maintained, and eventually the position of the tool support portion 30 with respect to the tool 70 is not changed.

To mount and fix the tool holder device to the tool grinder as shown in fig. 1 to 3, alternatively, the connection positioning portion 20 includes at least two connection blocks 21 and mutually matched adjusting bolts 22 and lock nuts 23, the connection blocks 21 are clearance-fitted with mounting grooves 61 on the tool grinder 60 as shown in fig. 3, and specifically, the connection blocks 21 are mounted to the mounting grooves 61 of the table of the tool grinder 60. Wherein, the left connecting block 21 can move up and down to be attached to the step surface of the mounting groove 61, and the right connecting block 21 can be locked and positioned on the workbench of the cutter grinder 60 through the adjusting bolt and the adjusting nut of the right connecting block 21, so that the position of the cutter bracket device on the workbench of the cutter grinder 60 is ensured not to deviate, and the positioning precision is ensured.

In addition, the lower end of the positioning block 15 extends beyond the lower surface of the bottom 11, a horizontally extending threaded hole is formed in the lower end of the positioning block 15, the adjusting bolt 22 passes through the threaded hole to be propped against the cutter grinder 60, and the position of the adjusting bolt 22 is locked by the locking nut 23, so that the cutter bracket device is further ensured not to move after being mounted on a workbench of the cutter grinder 60, and the cutter bracket device is stably mounted and accurately positioned.

As shown in fig. 1 to 3, in order to limit the distance of upward movement of the tool support 30, the tool support device optionally further includes a limiting portion 50, the limiting portion 50 being disposed at the upper end of the support body 10 for limiting the upper limit position of the tool support 30, preventing the tool support 30 from moving upward by an excessive distance, thereby preventing the tool 70 from being bent and broken due to upward pushing of the tool 70.

The limiting part 50 may take various suitable forms, as one embodiment of the present disclosure, as shown in fig. 1 to 3, alternatively, the limiting part 50 includes a limiting block 51 and a third pin 52, an axis of the third pin 52 is parallel to an axis of the first pin 44, the limiting block 51 is hinged to the bracket body 10 through the third pin 52, the limiting block 51 has a limiting end 511, and the limiting end 511 is engaged with a top end of the tool supporting part 30. The limiting part 50 further includes a third spring, a second adjusting bolt, and a locking bolt, and specifically, as shown in fig. 6, both ends of the limiting block 51 are respectively formed as a limiting end 511 and an adjusting end located at both sides of the third pin 52, and the limiting end 511 is engaged with the top end of the tool supporting part 30 to limit the upper limit position of the tool supporting part 30. The adjustment end is formed with two clamping arms with a second gap therebetween, through which a second adjustment bolt passes to abut against the bracket body 10, i.e., the mounting base portion 12, and a locking bolt connects the two clamping arms to lock the second adjustment bolt and the stopper to each other to lock the position of the stopper 51, which is not shown in the drawing. The third spring is located between the third pin and the limiting end and is elastically supported between the limiting block 51 and the holder body 10 to apply a pulling force to the limiting block 51, so that the limiting block 51 is in flexible contact with the tool supporting part 30, which is not shown in the drawing.

The tool support 30 may be formed in various forms, as one embodiment of the present disclosure, as shown in fig. 1 to 3, alternatively, the tool support 30 includes a tool support block 31 and a V-shaped support block 32 connected to each other, the tool support block 31 being connected to a support plate 43, the V-shaped support block 32 being used for placing the tool 70. The V-shaped support block 32 conforms to the shape and position of the knife 70 to apply the proper support force to the knife 70.

In addition, the tool support part 30 may further include an intermediate adjustment block connected between the tool support block 31 and the V-shaped support block 32, an arc-shaped mating surface in a horizontal plane being formed between the tool support block 31 and the intermediate adjustment block, the intermediate adjustment block being adjusted so as to be rotated about a rotation axis extending in the up-down direction with respect to the tool support block 31, to adjust the front-rear and left-right positions of the V-shaped support block 32; an arc-shaped mating surface in a vertical plane is formed between the V-shaped support block 32 and the intermediate adjustment block, and the V-shaped support block 32 is adjusted so that the V-shaped support block 32 rotates relative to the intermediate adjustment block about a rotation axis extending in the left-right direction to adjust the front-rear and up-down positions of the V-shaped support block 32. Thus, the position of the V-shaped support block 32 relative to the cutter 70 can be fine-tuned to ensure that both sides of the V-shaped support block 32 are tangential to the outer surface of the cutter 70 such that the V-shaped support block 32 is in line contact with the cutter 70 and the V-shaped support block 32 is in the same horizontal position as the cutter 70.

As shown in fig. 1, 5 and 6, in order to guide and position the limit fit between the tool support block 31 and the positioning block 51, optionally, a first guide inclined surface 311 extending upward is formed at the upper end of the tool support block 31, a second guide inclined surface 512 extending downward is formed at the limit end 511 of the limiting block 51, and the first guide inclined surface 311 and the second guide inclined surface 512 are attached to form a limit fit and can guide the movement of the tool support block 31 toward the limiting block 51 so as to facilitate the fit and positioning therebetween.

As shown in fig. 1 to 3, in order to facilitate the mounting of the tool support block 31 on the support plate 43, optionally, the driving end 432 of the support plate 43 is formed with a groove 433 (see fig. 4), the tool support block 31 is provided with a mounting pin 312 (see fig. 5), and the mounting pin 312 is overlapped on the groove 433 (see fig. 1), so that the connection positioning between the tool support block 31 and the support plate 43 is simple and convenient, the tool support block 31 is connected to the bracket body 10 through the second spring 33, the second spring 33 applies a pulling force to the tool support block 31, and the force of the tool 70 to the tool support 30 when the tool 70 is ground is prevented from deviating the tool support block 31 outwards from the bracket body 10.

The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure.

In addition, the specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, the present disclosure does not further describe various possible combinations.

Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.

Claims

1. A tool holder apparatus for a tool grinder, comprising:

a holder main body (10);

a connecting and positioning part (20) connected to the lower part of the bracket main body (10) and used for fixing the cutter bracket device on a cutter grinder (60);

a cutter supporting portion (30) movably connected to the holder body (10) for supporting a cutter (70), the cutter supporting portion (30) being located below the cutter (70) to support a front end of the cutter (70);

an operation unit (40) connected to the holder body (10) for driving the tool support unit (30) to move up and down with respect to the holder body (10);

the operation part (40) comprises a handle (41), a connecting plate (42) and a supporting plate (43), the handle (41) is hinged to the bracket main body (10) through a first pin shaft (44), the supporting plate (43) is hinged to the bracket main body (10) through a second pin shaft (45), the axis of the first pin shaft (44) is parallel to the axis of the second pin shaft (45), the handle (41) is provided with an operation end (411) and a connecting end (412), the distance between the operation end (411) and the first pin shaft (44) is larger than the distance between the connecting end (412) and the first pin shaft (44), the supporting plate (43) is provided with an input end (431) and a driving end (432), the driving end (432) is connected with the cutter supporting part (30), the distance between the input end (431) and the second pin shaft (45) is larger than the distance between the driving end (432) and the second pin shaft (45), and the connecting plate (42) is hinged to the connecting end (412) and the two ends (412) respectively;

the bracket body (10) comprises a bottom (11), a mounting base body part (12) and a wedge-shaped adjusting block (13), wherein the connecting and positioning part (20) is connected below the bottom (11), the mounting base body part (12) is positioned above the bottom (11), the operating part (40) and the cutter supporting part (30) are connected to the mounting base body part (12), a gap (14) is formed between the mounting base body part (12) and the bottom (11), the mounting base body part and the bottom (11) are connected on one side provided with the cutter supporting part (30), and the wedge-shaped adjusting block (13) is inserted into the gap (14) and is used for adjusting an included angle between the mounting base body part (12) and the bottom (11);

the operation part (40) further comprises a first spring (46), wherein the upper end of the first spring (46) is connected to the part of the supporting plate (43) between the input end (431) and the second pin shaft (45), and the lower end of the first spring is connected to the bracket main body (10);

the cutter support device further comprises a limiting part (50), wherein the limiting part (50) is arranged at the upper end of the support main body (10) and used for limiting the upper limit position of the cutter supporting part (30).

2. The tool holder device for a tool grinding machine according to claim 1, characterized in that the support plate (43) is "v" -shaped, the second pin (45) being arranged at an inflection of the support plate (43).

3. Tool holder device for a tool grinding machine according to claim 1, characterized in that the holder body (10) further comprises a positioning block (15) and a positioning pin (16), the positioning block (15) being connected to the bottom part (11), the positioning pin (16) passing through the positioning block (15) to bear against the mounting base part (12) to exert a downward force on the mounting base part (12) such that the wedge-shaped adjustment block (13) is clamped in the slit (14).

4. A tool holder device for a tool grinding machine according to claim 3, characterized in that the connecting and positioning part (20) comprises at least two connecting blocks (21), and mutually matched adjusting bolts (22) and locking nuts (23), the connecting blocks (21) are in clearance fit with mounting grooves (61) on the tool grinding machine (60), the lower ends of the positioning blocks (15) extend beyond the lower surface of the bottom (11), the lower ends of the positioning blocks (15) are provided with horizontally extending threaded holes, and the adjusting bolts (22) penetrate through the threaded holes to abut against the tool grinding machine (60).

5. The tool holder device for a tool grinder according to claim 1, wherein the limit part (50) includes a limit block (51) and a third pin (52), an axis of the third pin (52) is parallel to an axis of the first pin (44), the limit block (51) is hinged to the holder body (10) through the third pin (52), the limit block (51) has a limit end (511), and the limit end (511) is engaged with a top end of the tool supporting part (30).

6. Tool holder device for a tool grinder according to claim 5, characterized in that the tool support (30) comprises a tool support block (31) and a V-shaped support block (32) connected to each other, the tool support block (31) being connected to the support plate (43), the V-shaped support block (32) being intended for placing a tool (70).

7. The tool holder device for a tool grinder according to claim 6, wherein the upper end of the tool support block (31) is formed with a first guide slope (311) extending upward, and the limit end (511) of the limit block (51) is formed with a second guide slope (512) extending downward.

8. The tool holder device for a tool grinding machine according to claim 6, characterized in that the driving end (432) of the supporting plate (43) is formed with a recess (433), the tool supporting block (31) is provided with a mounting pin (312), the mounting pin (312) is overlapped on the recess (433), and the tool supporting block (31) is connected to the holder body (10) by a second spring (33).