High-precision external thread grinder driving head without reverse gap

Abstract

The utility model discloses a high accuracy outer thread grinding machine drive head without reverse gap relates to thread grinding machine technical field, including box, the inner chamber center of box is provided with the top bar and the center pin, still include: drive assembly, it includes torque motor stator, torque motor rotor and sleeve, torque motor stator fixed mounting is in the inner wall of box, torque motor rotor rotation is connected in torque motor stator center, sleeve outer ring fixed connection is in torque motor rotor, sleeve inner ring rotation is connected in center pin, sleeve drive end is used for linkage dial rotary motion to dial workpiece rotation, utilize torque motor stator and torque motor rotor drive dial, will torque motor be used for center pin immobile, dial movement's drive head, realized the gapless drive structure, and by position detection adopts hollow shaft encoder, realized the gapless movement, make the precision of the precision of main shaft drive head and improve.

Description

Technical Field

[0001] This utility model relates to the field of thread grinding technology, specifically to a high-precision external thread grinding head with no backlash. Background Technology

[0002] A thread grinding machine is a machine tool used to process threads. It is mainly used for precision grinding of threads. Thread grinding machines usually use a grinding method, through a grinding head, to process the workpiece to obtain a precise thread shape and size. To save on operating costs, current external thread grinding machine drive heads often adopt a structure with a fixed center and a rotating dial. This structure typically uses a geared motor or belt drive, both of which have backlash. This causes a brief idle stroke when the transmission system switches directions, resulting in a delayed response at the output end and affecting grinding accuracy. For example, the pitch accuracy of the thread grinding machine may be reduced due to the accumulation of backlash errors, making it difficult to guarantee the accuracy of the lead screw. Therefore, in view of this, the present invention proposes a high-precision external thread grinding head with no backlash to make up for and improve the shortcomings of the prior art. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a high-precision external thread grinding machine drive head with no backlash, including a housing, a top bar and a center passing through the center of the inner cavity of the housing, and also including: The drive assembly includes a torque motor stator, a torque motor rotor, and a sleeve. The torque motor stator is fixedly installed on the inner wall of the housing. The torque motor rotor is rotatably connected to the center of the torque motor stator. The outer ring of the sleeve is fixedly connected to the torque motor rotor. The inner ring of the sleeve is rotatably connected to the center. The drive end of the sleeve is used to drive the rotation of the dial to rotate the workpiece.

[0004] Preferably, a filter assembly is provided between the housing and the sleeve. The filter assembly includes a rotating shaft, a fan blade, and a collection box. The rotating shaft is driven to the drive end of the sleeve, the fan blade is fixedly connected to the outer surface of the rotating shaft, and the collection box is detachably connected to the outer surface of the housing. The suction force generated by the rotation of the fan blade sucks the metal debris generated by the grinding machine into the collection box.

[0005] Preferably, the drive assembly also includes a bearing disposed between the tip and the sleeve, with a shaft at the center of the bearing.

[0006] Preferably, a flange is fixed to the outer surface of the tip, a lock nut is provided on the flange, and a sealing ring is provided between the flange and the lock nut.

[0007] Preferably, a transition plate is fixedly connected to the outer surface of the sleeve, and a hollow shaft encoder is fixedly installed at the end of the transition plate away from the sleeve.

[0008] Preferably, the filter assembly also includes a rotating disk fixedly connected to the drive end of the rotating shaft, and a belt is used for transmission between the rotating disk and the sleeve.

[0009] Preferably, the filter assembly also includes a water-cooled outlet at the drain end of the housing and a water-cooled inlet at the inlet end of the housing.

[0010] Preferably, the filtration assembly also includes a filter screen fixedly connected to the inner wall of the collection box, and a pump is fixedly installed on the outer surface of the collection box.

[0011] Compared with the prior art, the beneficial effects of this utility model are: This utility model, through the setting of the drive component, uses the stator and rotor of the torque motor to drive the dial, and uses the torque motor on the drive head where the top is stationary and the dial moves, to achieve a backlash-free drive structure. Furthermore, the position detection adopts a hollow shaft encoder to achieve backlash-free motion, thereby improving the accuracy of the main spindle drive head. This invention enables the drive head to be forcibly cooled by circulating coolant through the water-cooling outlet and water-cooling inlet, thus ensuring the accuracy of the drive head. This invention, through its filter assembly, utilizes a belt and rotating shaft that follow the rotation of the sleeve. The rotating shaft, carrying the fan blades, generates suction to draw metal debris produced during grinding into a collection box, facilitating the automatic collection of metal debris generated during grinding. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of a preferred embodiment of the present invention; Figure 2 This is a schematic diagram of the installation structure of the water-cooled outlet and water-cooled inlet shown in this utility model; Figure 3 This is a schematic diagram of the connection structure between the transition plate and the hollow shaft encoder shown in this utility model.

[0013] The numbers on the map are: 1. Housing; 2. Top rod; 5. Center; 6. Sealing ring; 7. Flange; 8. Locking nut; 9. Transition plate; 10. Hollow shaft encoder; 3. Drive assembly; 31. Torque motor stator; 32. Torque motor rotor; 33. Bearing; 34. Shaft; 35. Sleeve; 4. Filter assembly; 41. Belt; 42. Rotating disc; 43. Rotating shaft; 44. Fan blade; 45. Collection box; 46. Filter screen; 47. Water-cooled outlet; 48. Water-cooled inlet; 49. Pump. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Embodiments of this utility model Please refer to Figures 1 to 3 As shown, a high-precision external thread grinding head with no backlash includes a housing 1, a top rod 2 and a center 5 passing through the center of the inner cavity of the housing 1, and also includes: Drive assembly 3 includes a torque motor stator 31, a torque motor rotor 32, and a sleeve 35. The torque motor stator 31 is fixedly installed on the inner wall of the housing 1. The torque motor rotor 32 is rotatably connected to the center of the torque motor stator 31. The outer ring of the sleeve 35 is fixedly connected to the torque motor rotor 32, and the inner ring of the sleeve 35 is rotatably connected to the center 5. The drive end of the sleeve 35 is used to drive the rotation of the dial to rotate the workpiece. Drive assembly 3 also includes a bearing 33 disposed between the center 5 and the sleeve 35. A shaft 34 is provided at the center of the bearing 33. The sleeve 35 is rotatably connected to the outer surface of the center 5 through the bearing 33. The outer surface of the center 5 is fixedly connected to the outer surface of the center 5. A flange 7 is fixed, and a locking nut 8 is provided on the flange 7. A sealing ring 6 is provided between the flange 7 and the locking nut 8. The sealing ring 6 is used to seal between the housing 1 and the center 5. A transition plate 9 is fixedly connected to the outer surface of the sleeve 35. A hollow shaft encoder 10 is fixedly installed at the end of the transition plate 9 away from the sleeve 35. The sleeve 35 is rotated by a torque motor. The hollow shaft encoder 10 is used to detect the accuracy. The center 5 is fixed, and the rotating dial moves the workpiece to rotate, realizing the interpolation of workpiece rotation and Z-axis movement. Due to the use of torque motor drive and hollow shaft encoder 10, the workpiece rotation is backlash-free, achieving high precision. The above scheme is adopted: by setting the drive component 3, the torque motor stator 31 and torque motor rotor 32 drive the dial, and the torque motor is used on the drive head where the top 5 is stationary and the dial moves, thus realizing a backlash-free drive structure. The position detection adopts hollow shaft encoder 10 to realize backlash-free movement, thereby improving the accuracy of the main shaft drive head.

[0016] Please refer to Figure 1 and Figure 2As shown, a filter assembly 4 is provided between the housing 1 and the sleeve 35. The filter assembly 4 includes a rotating shaft 43, a fan blade 44, and a collection box 45. The rotating shaft 43 is driven to the drive end of the sleeve 35. The fan blade 44 is fixedly connected to the outer surface of the rotating shaft 43. The collection box 45 is detachably connected to the outer surface of the housing 1. The suction force generated by the rotation of the fan blade 44 draws metal debris generated by the grinding machine into the collection box 45. The filter assembly 4 also includes a rotating disk 42 fixedly connected to the drive end of the rotating shaft 43. The rotating disk 42 and the sleeve 35 are connected to each other. The intermediate drive is connected by a belt 41. The filter assembly 4 also includes a water-cooled outlet 47 opened at the drain end of the box 1 and a water-cooled inlet 48 opened at the inlet end of the box 1. The filter assembly 4 also includes a filter screen 46 fixedly connected to the inner wall of the collection box 45. The filter screen 46 divides the inner cavity of the collection box 45 into a debris storage cavity and a heat dissipation cavity. A pump 49 is fixedly installed on the outer surface of the collection box 45. The pump 49's liquid suction end is connected to the water-cooled outlet 47 through a liquid suction pipe, and the pump 49's liquid discharge end is connected to the water-cooled inlet 48 through a liquid discharge pipe. By adopting the above solution, the coolant is circulated through the water-cooling outlet 47 and the water-cooling inlet 48, which enables the drive head to be forcibly cooled by the coolant, thus ensuring the accuracy of the drive head. In addition, the filter assembly 4 can utilize the belt 41 and the rotating shaft 43 to follow the rotation of the sleeve 35, so that the rotating shaft 43 carries the fan blade 44 and the suction force generated by the rotation can suck the metal debris generated by the grinding machine into the collection box 45, which is beneficial for the device to automatically collect the metal debris generated by the grinding machine.

[0017] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0018] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-precision external thread grinding machine drive head with no backlash, comprising a housing (1), wherein a top rod (2) and a center point (5) are disposed at the center of the inner cavity of the housing (1), characterized in that, It also includes a drive assembly (3), which includes a torque motor stator (31), a torque motor rotor (32) and a sleeve (35). The torque motor stator (31) is fixedly installed on the inner wall of the housing (1). The torque motor rotor (32) is rotatably connected to the center of the torque motor stator (31). The outer ring of the sleeve (35) is fixedly connected to the torque motor rotor (32). The inner ring of the sleeve (35) is rotatably connected to the tip (5). The drive end of the sleeve (35) is used to drive the dial to rotate and rotate to make the workpiece rotate.

2. The high-precision external thread grinding head with zero backlash according to claim 1, characterized in that, A filter assembly (4) is provided between the housing (1) and the sleeve (35). The filter assembly (4) includes a rotating shaft (43), a fan blade (44), and a collection box (45). The rotating shaft (43) is driven to the drive end of the sleeve (35). The fan blade (44) is fixedly connected to the outer surface of the rotating shaft (43). The collection box (45) is detachably connected to the outer surface of the housing (1). The suction force generated by the rotation of the fan blade (44) sucks the metal chips generated by the grinding machine into the collection box (45).

3. The high-precision external thread grinding head with zero backlash according to claim 1, characterized in that, The drive assembly (3) also includes a bearing (33) disposed between the tip (5) and the sleeve (35), and a shaft (34) is provided at the center of the bearing (33).

4. The high-precision external thread grinding head with zero backlash according to claim 1, characterized in that, A flange (7) is fixed to the outer surface of the tip (5), a locking nut (8) is provided on the flange (7), and a sealing ring (6) is provided between the flange (7) and the locking nut (8).

5. The high-precision external thread grinding head with zero backlash according to claim 1, characterized in that, A transition plate (9) is fixedly connected to the outer surface of the sleeve (35), and a hollow shaft encoder (10) is fixedly installed at the end of the transition plate (9) away from the sleeve (35).

6. The high-precision external thread grinding head with zero backlash according to claim 2, characterized in that, The filter assembly (4) also includes a rotating disk (42) fixedly connected to the drive end of the rotating shaft (43), and a belt (41) is connected between the rotating disk (42) and the sleeve (35).

7. The high-precision external thread grinding head with zero backlash according to claim 6, characterized in that, The filter assembly (4) also includes a water-cooled outlet (47) opened at the drain end of the housing (1), and a water-cooled inlet (48) opened at the inlet end of the housing (1).

8. The high-precision external thread grinding head with zero backlash according to claim 2, characterized in that, The filter assembly (4) also includes a filter screen (46) fixedly connected to the inner wall of the collection box (45), and a pump (49) is fixedly installed on the outer surface of the collection box (45).

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