CN218461695U

CN218461695U - Glib needle valve body grinding frock

Info

Publication number: CN218461695U
Application number: CN202222807317.9U
Authority: CN
Inventors: 应建良
Original assignee: Hangzhou Daning Oil Nozzle Pump Co ltd
Current assignee: Hangzhou Daning Oil Nozzle Pump Co ltd
Priority date: 2022-10-24
Filing date: 2022-10-24
Publication date: 2023-02-10
Anticipated expiration: 2032-10-24

Abstract

The utility model belongs to the technical field of glib needle valve production and processing, specifically be a glib needle valve body grinding frock, comprises a workbench, fixed surface is equipped with the backup pad on workstation one side, backup pad fixed surface is equipped with the fixed plate, the workstation upper surface is equipped with the portion of processing that is used for carrying out abrasive machining to the glib needle valve, portion of processing one side is equipped with drive screw, drive screw one end run through the backup pad and with backup pad normal running fit, the backup pad is kept away from fixed being equipped with driving motor in the one side of fixed plate, driving motor's output shaft and drive screw fixed connection, the drive screw overcoat has drive gear, drive gear and drive screw-thread fit, drive gear one side is equipped with rotary gear, rotary gear and drive gear meshing, the portion of processing sets up on rotary gear, the limitation that current grinding device need to use the instrument grinding of different sizes to the height of glib needle valve surperficial difference has been solved.

Description

Glib needle valve body grinding frock

Technical Field

The utility model belongs to the technical field of glib needle valve production and processing, especially, relate to a glib needle valve body grinding frock.

Background

When traditional glib needle valve grinding, adopt horizontal grinding, big or small excircle needs separately the grinding, and for the ease of the location needs still, sets up the technology excircle unanimous with big excircle diameter outside down, causes a needle valve just to correspond one set of needle valve production blank, and the blank specification is many, improves manufacturing cost, and need earlier grind off the technology excircle earlier when little excircle grinding, and grinding efficiency is low, and grinding cost is high.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an overcome prior art not enough, provide a glib needle valve body grinding frock.

The utility model discloses a realize above-mentioned purpose, provide following technical scheme: the utility model provides a glib needle valve body grinding frock, includes the workstation, fixed surface is equipped with the backup pad on workstation one side, backup pad fixed surface is equipped with the fixed plate, the workstation upper surface is equipped with the portion of processing that is used for carrying out abrasive machining to the glib needle valve, processing portion one side is equipped with drive screw, drive screw one end run through the backup pad and with backup pad normal running fit, the backup pad is kept away from fixed driving motor that is equipped with in the one side of fixed plate, driving motor's output shaft and drive screw fixed connection, the drive screw overcoat has drive gear, drive gear and drive screw thread fit, drive gear one side is equipped with the swing pinion, swing pinion and drive gear meshing, processing portion sets up on the swing pinion.

Optionally, the workstation upper surface both sides have all been seted up and have been removed the spout, both sides all slide in the removal spout and be equipped with removal limiting plate, both sides remove the fixed second limiting plate that is equipped with of limiting plate upper end surface symmetry, both sides the fixed second spacing axle that is equipped with of fixed surface symmetry that the second limiting plate is close to rotary gear, the second spacing groove has all been seted up on the rotary gear two sides, both sides the second spacing axle slides respectively and sets up in two sides second spacing groove, is close to one side of drive gear remove fixed first limiting plate, both sides of being equipped with of symmetry on the limiting plate middle section both sides outer wall in the symmetry first limiting plate is close to drive gear's the fixed first spacing axle that is equipped with of symmetry in one side, first spacing groove has all been seted up on the drive gear two sides first spacing axle slides respectively and sets up in two first spacing inslots.

Optionally, the processing portion includes a control motor and a grinding wheel, the center of the grinding wheel is fixedly connected with an output shaft of the control motor, a first fixing plate and a second fixing plate are fixedly arranged on the surface of the inner ring of the rotary gear, a movable through groove is formed in the upper surfaces of the first fixing plate and the second fixing plate, movable limiting grooves are symmetrically formed in the inner walls of two sides of the movable through groove, a second sliding plate is arranged in the movable through groove of the second fixing plate in a sliding mode, second limiting strips are symmetrically fixed to the outer walls of two sides of the second sliding plate, two sides of the second limiting strips are respectively arranged in the movable limiting grooves of two sides in a sliding mode, and the control motor is fixedly arranged on the surface, close to the fixing plate, of the second sliding plate.

Optionally, a second expansion rod is fixedly arranged on one side of the surface of the second sliding plate, which is far away from the control motor, a second moving rack is fixedly arranged on one end of the second expansion rod, which is far away from the second sliding plate, a second moving gear is arranged on one side of the second moving rack, the second moving gear is meshed with the second moving rack, a second mounting plate is fixedly arranged on one side wall, which is close to the second fixing plate, of the rotating gear, a second rotating shaft is fixedly arranged at the center of the second moving gear, one end of the second rotating shaft is in rotating fit with the surface of the second mounting plate, and a second synchronizing wheel is fixedly arranged at one end, which is far away from the second mounting plate, of the second rotating shaft, which penetrates through the second moving gear.

Optionally, a first sliding plate is slidably disposed in the through groove of the first fixing plate, first limiting strips are fixedly disposed on outer walls of two sides of the first sliding plate, the first limiting strips are slidably disposed in the limiting grooves of the two sides, a first expansion rod is fixedly disposed on one side of the surface of the first sliding plate, a first moving rack is fixedly disposed at one end of the first expansion rod, which is far away from the first sliding plate, a first moving gear is disposed on one side of the first moving rack, the first moving gear is disposed on the same side of the first moving gear as the second moving gear, the first moving gear is meshed with the first moving rack, a first rotating shaft is fixedly disposed in the center of the first moving gear, a first mounting plate is fixedly disposed on one side of the rotating gear, one end of the first rotating shaft is rotatably matched with the first mounting plate, one end of the first rotating shaft, which is far away from the first mounting plate, penetrates through the first moving gear and is fixedly disposed with a first synchronizing wheel, and the first synchronizing wheel is connected with the second synchronizing wheel through a synchronizing belt.

Optionally, a return spring is fixedly arranged on the lower surface of the first extension rod, and one end, far away from the first extension rod, of the return spring is fixedly arranged on the surface of the rotating gear.

Optionally, the distance from one surface of the first sliding plate close to the second sliding plate to the center of the rotary gear is equal to the distance from one surface of the grinding wheel close to the first sliding plate to the center of the rotary gear.

To sum up, the beneficial effects of the utility model reside in that: the driving motor is used for controlling the driving screw rod to rotate, the driving screw rod is driven to rotate and move by the rotation of the driving screw rod, so that the rotating gear meshed with the driving screw rod synchronously moves in the rotating process, and the processing part arranged on the rotating gear can move forwards in the process of circular motion to comprehensively and integrally grind the whole oil nozzle needle valve; the height of the surface of the oil nozzle needle valve is judged by the contact of the first sliding plate and the surface of the oil nozzle needle valve, so that the first sliding plate moves up and down to drive the grinding wheel to move up and down, the condition that the heights of the surface of the oil nozzle needle valve are different is met, a grinding tool can be used for finishing work, the cost is reduced, and the efficiency is improved.

Drawings

Fig. 1 is an overall external schematic view of the present invention.

Fig. 2 is a schematic view of a rotary gear and a driving gear of the present invention.

Fig. 3 is a schematic view of a movable chute according to the present invention.

Fig. 4 is the utility model discloses a drive gear, second limiting plate schematic diagram.

Fig. 5 is the utility model discloses a remove limiting plate, drive gear schematic diagram.

Fig. 6 is a schematic view of a first limit shaft and a second limit shaft of the present invention.

Fig. 7 is a schematic diagram of a grinding wheel and a control motor according to the present invention.

Fig. 8 is a schematic view of the first fixing plate, the first extension rod and the return spring of the present invention.

Fig. 9 is a schematic view of the through groove, the movable limiting groove, the first sliding plate and the first limiting strip of the present invention.

Fig. 10 is a schematic view of a lower partial wheel of a rotary gear according to the present invention.

Fig. 11 is a schematic view of a first mounting plate, a first rotating shaft, a first moving gear and a first synchronizing wheel of the present invention.

Fig. 12 is a schematic view of an upper portion of a rotary gear according to the present invention.

Fig. 13 is a schematic view of a second mounting plate, a second rotating shaft, a second moving gear and a second synchronizing wheel of the present invention.

In the figure, 1, a workbench; 2. a support plate; 3. a drive motor; 4. driving a lead screw; 5. a fixing plate; 6. A processing section; 101. a moving chute; 601. moving the limiting plate; 602. a first limit plate; 603. a second limiting plate; 604. a drive gear; 605. a first limit groove; 606. a rotating gear; 607. a second limit groove; 608. a first limit shaft; 609. a second limit shaft; 610. controlling the motor; 611. a grinding wheel; 612. a first fixing plate; 613. a first sliding plate; 614. a first extension bar; 615. a first moving rack; 616. a return spring; 617. a first limit bar; 618. a first mounting plate; 619. a first rotating shaft; 620. a first moving gear; 621. a first synchronizing wheel; 622. a synchronous belt; 623. a second fixing plate; 624. a second sliding plate; 625. a second extension rod; 626. a second moving rack; 627. a second moving gear; 628. a second synchronizing wheel; 629. a second rotation shaft; 630. a second mounting plate; 631. moving the through groove; 632. movable limiting groove

Detailed Description

In order to make the technical field personnel understand the utility model discloses the scheme, will combine the drawing in the embodiment of the utility model below, to the technical scheme in the embodiment of the utility model carries out clear, complete description.

Referring to fig. 1-13, a glib needle valve body grinding frock includes workstation 1, and workstation 1 one side fixed surface is equipped with backup pad 2, and backup pad 2 fixed surface is equipped with fixed plate 5 for fix the needle valve glib talker that needs the grinding, avoid in the grinding process that the needle valve glib talker takes place to remove, causes the grinding process to have the problem.

The upper surface of the workbench 1 is provided with a processing part 6 for grinding the oil nozzle needle valve, one side of the processing part 6 is provided with a driving lead screw 4, one end of the driving lead screw 4 penetrates through the supporting plate 2 and is in running fit with the supporting plate 2, one surface of the supporting plate 2, which is far away from the fixing plate 5, is fixedly provided with a driving motor 3, an output shaft of the driving motor 3 is fixedly connected with the driving lead screw 4, the driving lead screw 4 is sleeved with a driving gear 604, the driving gear 604 is in threaded fit with the driving lead screw 4, one side of the driving gear 604 is provided with a rotating gear 606, the rotating gear 606 is meshed with the driving gear 604, the processing part 6 is arranged on the rotating gear 606, the driving lead screw 4 is driven to rotate by an output source of the driving motor 3, the driving gear 604 in threaded fit with the driving lead screw 4 rotates and can move along with the driving lead screw 4, the rotation of the driving gear 604 can drive the rotating gear 606 to rotate continuously, the processing track conforms to the shape of the oil nozzle needle valve, on the one hand, energy is saved, the cost is reduced, on the other hand, the appearance of parts which need to be processed is fully conformed to the appearance of the oil nozzle needle valve, and the processing is more convenient.

The two sides of the upper surface of the workbench 1 are both provided with the movable sliding chutes 101, the two sides of the movable sliding chutes 101 are both provided with the movable limiting plates 601 in a sliding manner, the upper end surfaces of the two sides of the movable limiting plates 601 are symmetrically and fixedly provided with the second limiting plates 603, the surfaces of the two sides of the second limiting plates 603, which are close to the rotary gear 606, are symmetrically and fixedly provided with the second limiting shafts 609, the two sides of the rotary gear 606 are both provided with the second limiting grooves 607, the two sides of the second limiting shafts 609 are respectively and slidably arranged in the two second limiting grooves 607, the outer walls of the two sides of the middle section of the movable limiting plate 601, which are close to the drive gear 604, are symmetrically and fixedly provided with the first limiting shafts 608, the two sides of the first limiting plates 602, which are close to the drive gear 604, are both provided with the first limiting grooves 605, the two sides of the first limiting shafts 608 are respectively and slidably arranged in the two first limiting grooves 605, the movable limiting plates 601, provide a supporting force for the rotary gear 606, so that the rotary gear 606 can keep the current state to move, and the synchronous movement of the drive gear 604 can be prevented from being meshed with the rotary gear 604, and the synchronous movement of the drive gear 604, and the rotary gear 604, and the synchronous movement of the rotary gear 604 can be prevented from occurring along with the synchronous movement of the synchronous movement process of the rotary gear 604.

The processing part 6 comprises a control motor 610 and a grinding wheel 611, the center of the grinding wheel 611 is fixedly connected with an output shaft of the control motor 610, and the control motor 610 controls the rotation of the grinding wheel 611, so that the grinding wheel 611 can grind the surface of the oil nozzle needle valve.

The fixed first fixed plate 612 and the second fixed plate 623 that are equipped with in the surface of the internal ring of rotating gear 606, remove logical groove 631 has all been seted up to first fixed plate 612 and second fixed plate 623 upper surface, remove to lead to the symmetry on the inner wall of groove 631 both sides and seted up and remove spacing groove 632, the removal of second fixed plate 623 is led to the groove 631 and is slided and is equipped with second sliding plate 624, the fixed second spacing strip that is equipped with of second sliding plate 624 both sides outer wall symmetry, the spacing strip of both sides second slides respectively and sets up in the removal spacing groove 632 of both sides, control motor 610 is fixed to be set up on the surface that second sliding plate 624 is close to fixed plate 5.

A second extension bar 625 is fixedly arranged on one side of the surface of the second sliding plate 624 away from the control motor 610, a second moving rack 626 is fixedly arranged on one end of the second extension bar 625 away from the second sliding plate 624, a second moving gear 627 is arranged on one side of the second moving rack 626, the second moving gear 627 is meshed with the second moving rack 626, a second mounting plate 630 is fixedly arranged on one side wall of the rotating gear 606 close to the second fixing plate 623, a second rotating shaft 629 is fixedly arranged at the center of the second moving gear 627, one end of the second rotating shaft 629 is in rotating fit with the surface of the second mounting plate 630, and a second synchronizing wheel 628 is fixedly arranged on one end of the second rotating shaft 629 away from the second mounting plate 630.

A first sliding plate 613 is slidably disposed in the moving through groove 631 of the first fixing plate 612, first limiting strips 617 are fixedly disposed on outer walls of two sides of the first sliding plate 613, the first limiting strips 617 on two sides are respectively slidably disposed in the moving limiting grooves 632 on two sides, a first expansion rod 614 is fixedly disposed on one side of a surface of the first sliding plate 613, the first expansion rod 614 and the second expansion rod 625 are located on opposite sides, a first moving rack 615 is fixedly disposed on one end of the first expansion rod 614 away from the first sliding plate 613, a first moving gear 620 is disposed on one side of the first moving rack 615, the first moving gear 620 and the second moving gear 627 are in a vertical line, the first moving gear 620 is engaged with the first moving rack 615, the first moving rack 615 and the second moving rack 626 are located on opposite sides of the first moving gear 620 and the second moving gear 627, a first rotating shaft 619 is fixedly disposed at a center of the first moving gear 620, a first rotating shaft 628 is fixedly disposed on one side of the rotating gear 606 close to the first sliding plate 613, one end of the first rotating shaft 618 is rotatably engaged with the first rotating shaft 618, and a second rotating shaft 628, the first rotating shaft 628 is connected to the first synchronous pulley 619, and the second synchronous pulley 619, and the first synchronous pulley 628, and the first synchronous pulley can move synchronously through the same direction, and the first synchronous pulley 619, and the synchronous pulley 622, and the synchronous pulley 628, the synchronous pulley 622, and the synchronous pulley 622, the synchronous pulley can move synchronously, the height of the surface of the oil nozzle needle valve is sensed automatically to change.

The lower surface of the first extension rod 614 is fixedly provided with a return spring 616, one end of the return spring 616, which is far away from the first extension rod 614, is fixedly arranged on the surface of the rotating gear 606, when the height of the surface of the nozzle needle valve changes, the first sliding plate 613 can restore by itself, the situation that the first sliding plate 613 can only move downwards is avoided, the grinding wheel 611 can be in contact with the surface of the nozzle needle valve by matching with the first synchronizing wheel 621 and the second synchronizing wheel 628, the situation that a spring is also fixedly arranged below the second extension rod 625 is avoided, thus, an unnecessary buffer effect of the grinding wheel 611 occurs in the working process, and the grinding effect of the grinding wheel 611 is reduced.

The distance from the surface of the first sliding plate 613 close to the second sliding plate 624 to the center of the rotary gear 606 is equal to the distance from the surface of the grinding wheel 611 close to the first sliding plate 613 to the center of the rotary gear 606, and both the first sliding plate 613 and the grinding wheel 611 need to be in contact with the surface of the nozzle needle, so that the first sliding plate 613 can move according to the surface of the nozzle needle, and thus the second sliding plate 624 is driven to move, and the second sliding plate 624 drives the grinding wheel 611 to move.

The upper surface of the first sliding plate 613 is in contact with the surface of the nozzle needle valve, the grinding wheel 611 is in contact with the surface of the nozzle needle valve, the driving motor 3 operates to drive the driving screw rod 4 to rotate, the driving gear 604 rotates synchronously when the driving screw rod 4 rotates due to the threaded connection between the driving gear 604 and the driving screw rod 4, the driving gear 604 continuously moves forwards while rotating, the rotating gear 606 is driven to rotate by the rotation of the driving gear 604, and the first limiting shaft 608 and the second limiting shaft 609 on the one-side movement limiting plate 601 synchronously limit the movement of the driving gear 604 and the rotating gear 606, so that the rotating gear 606 moves along with the movement of the driving gear 604.

While the rotary gear 606 moves while rotating, the control motor 610 drives the grinding wheel 611 to rotate, and the surface of the nozzle needle is continuously machined.

When the rotating gear 606 moves, when the first sliding plate 613 moves downward due to the change of the height difference of the nozzle needle surface, the first moving rack 615 is simultaneously driven to move downward, the first moving gear 620 rotates counterclockwise, the counterclockwise rotation of the first moving gear 620 drives the first rotating shaft 619 to rotate counterclockwise, the first synchronizing wheel 621 rotates counterclockwise, the second synchronizing wheel 628 drives the second moving gear 627 to rotate counterclockwise through the timing belt 622, the second moving rack 626 is driven to move upward, so that the grinding wheel 611 contacts with the nozzle needle surface when the upper surface of the first sliding plate 613 contacts with the nozzle needle surface.

As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, that a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect.

It is noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrases "comprising one of \8230;" does not exclude the presence of additional like elements in an article or system comprising the element.

The foregoing description shows and describes several preferred embodiments of the present application, but as aforementioned, it is to be understood that the application is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the application as described herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the application, which is to be protected by the claims appended hereto.

Claims

1. The utility model provides a glib needle valve body grinding frock, a serial communication port, including workstation (1), fixed surface is equipped with backup pad (2) on workstation (1) one side, backup pad (2) fixed surface is equipped with fixed plate (5), workstation (1) upper surface is equipped with and is used for carrying out abrasive machining's processing portion (6) to the glib needle valve, processing portion (6) one side is equipped with drive lead screw (4), drive lead screw (4) one end run through backup pad (2) and with backup pad (2) normal running fit, fixed driving motor (3) that are equipped with in the one side of fixed plate (5) are kept away from in backup pad (2), the output shaft and the drive lead screw (4) fixed connection of driving motor (3), drive lead screw (4) overcoat has drive gear (604), drive gear (604) and drive lead screw (4) screw-thread fit, drive gear (604) one side is equipped with swing pinion (606), swing pinion (606) and drive gear (604) meshing, processing portion (6) set up on swing pinion (606).

2. The grinding tool for the nozzle needle valve body according to claim 1, wherein moving sliding grooves (101) are formed in two sides of the upper surface of the workbench (1), moving limiting plates (601) are slidably arranged in the moving sliding grooves (101) in the two sides, second limiting plates (603) are symmetrically and fixedly arranged on the upper end surfaces of the moving limiting plates (601) in the two sides, second limiting shafts (609) are symmetrically and fixedly arranged on the surfaces, close to the rotating gear (606), of the second limiting plates (603) in the two sides, second limiting grooves (607) are formed in two sides of the rotating gear (606), second limiting shafts (609) in the two sides are respectively and slidably arranged in second limiting grooves (607) in the two sides, first limiting plates (602) are symmetrically and fixedly arranged on the outer walls of the two sides of the middle section of the moving limiting plate (601) in the two sides, first limiting shafts (608) are symmetrically and fixedly arranged on one sides, close to the driving gear (604), first limiting grooves (605) are respectively and slidably arranged on the two sides of the first limiting shafts (608).

3. The glib needle valve body grinding tool of claim 1, characterized in that the processing part (6) comprises a control motor (610) and a grinding wheel (611), the center of the grinding wheel (611) is fixedly connected with an output shaft of the control motor (610), a first fixing plate (612) and a second fixing plate (623) are fixedly arranged on the surface of an inner ring of the rotating gear (606), a moving through groove (631) is formed in the upper surfaces of the first fixing plate (612) and the second fixing plate (623), moving limiting grooves (632) are symmetrically formed in the inner walls of two sides of the moving through groove (631), a second sliding plate (624) is arranged in the moving through groove of the second fixing plate (623) in a sliding manner, second limiting strips are symmetrically and fixedly arranged on the outer walls of two sides of the second sliding plate (624), the second limiting strips are respectively arranged in the moving limiting grooves (632) of two sides in a sliding manner, and the control motor (610) is fixedly arranged on the surface, close to the fixing plate (5), of the second sliding plate (624).

4. The glib needle valve body grinding tool according to claim 3, characterized in that a second extension rod (625) is fixedly arranged on one side of the surface of the second sliding plate (624) far away from the control motor (610), a second moving rack (626) is fixedly arranged on one end of the second extension rod (625) far away from the second sliding plate (624), a second moving gear (627) is arranged on one side of the second moving rack (626), the second moving gear (627) is meshed with the second moving rack (626), a second mounting plate (630) is fixedly arranged on one side wall of the rotating gear (606) close to the second fixing plate (623), a second rotating shaft (629) is fixedly arranged in the center of the second moving gear (627), one end of the second rotating shaft (629) is rotatably matched with the surface of the second mounting plate (630), and one end of the second rotating shaft (629) far away from the second mounting plate (630) penetrates through the second moving gear (627) and is fixedly provided with a second synchronizing wheel (628).

5. The nozzle needle valve body grinding tool according to claim 4, wherein a first sliding plate (613) is slidably arranged in the moving through groove (631) of the first fixing plate (612), first limiting bars (617) are fixedly arranged on outer walls of two sides of the first sliding plate (613), the first limiting bars (617) on the two sides are respectively slidably arranged in the moving limiting grooves (632) on the two sides, a first expansion rod (614) is fixedly arranged on one side of the surface of the first sliding plate (613), a first moving rack (615) is fixedly arranged at one end, away from the first sliding plate (613), of the first expansion rod (614), a first moving gear (620) is arranged on one side of the first moving rack (615), the first moving gear (620) is arranged on the same side as the second moving gear (627) and the first moving gear (620) is meshed with the first moving rack (615), a first rotating shaft (619) is fixedly arranged at the center of the first moving gear (620), a first mounting plate (618) is fixedly arranged on one surface, close to the first sliding plate (613), of the rotating gear (606), one end of the first rotating shaft (619) is in rotating fit with the first mounting plate (618), one end, far away from the first mounting plate (618), of the first rotating shaft (619) penetrates through the first moving gear (620) and is fixedly provided with a first synchronizing wheel (621), and a synchronizing belt (a) is arranged between the first synchronizing wheel (621) and the second synchronizing wheel (628) 622) And (4) connecting.

6. The glib needle valve body grinding tool according to claim 5, characterized in that a return spring (616) is fixedly arranged on the lower surface of the first extension rod (614), and one end of the return spring (616) far away from the first extension rod (614) is fixedly arranged on the surface of the rotating gear (606).

7. The grinding tool for the valve body of the nozzle needle according to claim 6, wherein the distance from the surface of the first sliding plate (613) close to the second sliding plate (624) to the center of the rotary gear (606) is equal to the distance from the surface of the grinding wheel (611) close to the first sliding plate (613) to the center of the rotary gear (606).