Mini lathe headstock structure

Abstract

This utility model discloses a spindle box structure for a mini lathe, comprising: a housing with an opening on its mounting side, a mounting plate fixed to the opening, a mounting cylinder fixed to the upper front of the housing, a spindle mounted in the mounting cylinder, a manual chuck at one end of the spindle, a spindle pulley fixed to the other end of the spindle, a motor top locked to a base plate, screw holes on the upper, lower, left, and right edges of the base plate, the motor top extending into the housing through a clearance hole, a vent cover threaded onto the output side of the housing to cover the motor tail end, four elongated holes on the mounting plate corresponding to four screw holes, four adjusting screws passing through the four elongated holes and screwed into the four screw holes respectively, a motor pulley fixed to the motor output shaft, and belt drive between the spindle pulley and the motor pulley. A housing cover is also provided on the mounting side of the housing, the rear side of which is hinged to the housing. This spindle box structure promotes the miniaturization and lightweighting of lathes.

Description

Technical Field

[0001] This utility model relates to the field of power tools, specifically to a spindle box structure for a mini lathe. Background Technology

[0002] Existing conventional lathes are bulky, making them inconvenient for classroom teaching. There is an urgent need for a mini lathe that is small in size, lightweight, and has roughly the same functions as a conventional lathe. This mini lathe can be used to process plastic parts for teaching demonstrations. The spindle box structure of the mini lathe is key to the miniaturization and lightweighting of the lathe. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a spindle box structure for a mini lathe that can promote the miniaturization and lightweighting of lathes.

[0004] To solve the above problems, the technical solution adopted by this utility model is as follows: a spindle box structure for a mini lathe, comprising: a box body, one side of which is an output side, and the other side of which is a mounting side, with the output side and the mounting side facing each other. The characteristic feature is that: an opening is provided on the mounting side of the box body, and a mounting plate is detachably fixed to the opening by screws; a left-right oriented mounting cylinder is fixed in the upper front part of the box body, and a spindle is mounted in the mounting cylinder via bearings; one end of the spindle extends from the output side of the box body, and a manual chuck for fixing the workpiece is mounted on it; the other end of the spindle passes through the mounting plate, and a spindle pulley is fixed on it; a clearance hole for avoiding the motor is provided on the side wall of the output side at the lower rear part of the box body; the top of the motor where the motor output shaft is located is locked to the base plate by screws; and a screw is provided on each of the upper, lower, left, and right edges of the base plate. The motor has a hole through which its top extends into the housing, while its tail protrudes from the outside of the housing. A vent cover is threaded onto the output side of the housing, covering the tail of the motor. Four vertically oriented elongated holes are provided on the mounting plate, each corresponding to a screw hole. Four adjusting screws pass through the elongated holes and are screwed into the screw holes, securing the motor to the mounting plate. The motor's output shaft passes through the mounting plate, and a motor pulley is fixed to it. A belt drives the main shaft pulley and the motor pulley. Loosening the four adjusting screws allows the belt tension to be adjusted by moving the motor up and down. A cover is also provided on the mounting side of the housing, hinged to the rear of the cover, allowing it to open and close. When closed, the cover protects the opening, mounting plate, main shaft pulley, and motor pulley, and can be locked with a lock.

[0005] Furthermore, in the aforementioned mini lathe headstock structure: a rotatable, left-right oriented shaft is provided on the output side of the headstock, with the inner end of the shaft inserted into the headstock. A transparent cover is provided above the manual chuck, with the rear end of the cover fixed to the shaft, allowing the cover to be flipped via the shaft. A step is provided on the inner side of the cover. When the cover is flipped downwards to cover the manual chuck for protection, the step on the inner side of the cover will abut against the headstock to support the cover. When the cover is flipped upwards to a vertical position without protecting the manual chuck, the rear end of the step on the inner side of the cover will abut against the headstock to limit the cover.

[0006] Furthermore, in the aforementioned spindle box structure of the mini lathe, a micro switch, a follower plate, and a controller for controlling the motor are installed in the housing. The follower plate is located above the micro switch and has contacts. The follower plate is fitted onto the inner end of the rotating shaft and can rotate with the rotating shaft. When the protective cover is placed over the manual chuck for protection, the contacts will not press to trigger the micro switch, and the motor can be started. When the protective cover is driven to flip upward, the follower plate will rotate with the rotating shaft, and the contacts will press to trigger the micro switch under the drive of the follower plate. After the micro switch is triggered, it will send a signal to the controller, which will prevent the motor from starting or immediately stop the working motor.

[0007] Furthermore, in the aforementioned mini lathe headstock structure: a flat surface is provided on the inner end sidewall of the spindle, and a flat surface is also provided on the inner ring of the follower disc. When the follower disc is fitted onto the spindle, the two flat surfaces will cooperate, allowing the follower disc to rotate together with the spindle and to move axially along the spindle. An abutment shoulder is provided on the spindle, located on the outside of the headstock. The abutment shoulder abuts against the outside of the headstock via an outer gasket fitted onto the spindle. A... An inner washer and a tightening nut are provided. The inner washer is fitted onto the rotating shaft and abuts against the shoulder on the inner end of the rotating shaft. The tightening nut is threaded onto the rotating shaft. After the tightening nut is screwed in, it can lock the inner washer. A spring is fitted on the rotating shaft between the inner washer and the follower plate. Under the action of the spring, the follower plate will press against the inner side of the box to increase the friction. The outer washer will press against the outer side of the box to increase the friction. This allows the cover to stop at any position within its rotation range by friction after the external force disappears.

[0008] Furthermore, in the aforementioned spindle box structure of the mini lathe, the spindle is a hollow structure, a through hole is provided on the spindle pulley to allow the workpiece to pass, a workpiece hole is provided on the cover to allow the workpiece to pass, and a hole cover is provided on the outside of the cover to cover the workpiece hole. The upper side of the hole cover is fixed to the cover by screws. After loosening the screws, the hole cover can be moved so that it does not cover the workpiece hole.

[0009] Furthermore, in the aforementioned mini lathe's headstock structure, both the spindle pulley and the motor pulley are double pulleys. The inner side of the spindle pulley is a large pulley, and the outer side is a small pulley. The outer side of the motor pulley is a large pulley, and the inner side is a small pulley. The large pulley on the inner side of the spindle pulley and the small pulley on the inner side of the motor pulley work together for transmission, and the small pulley on the outer side of the spindle pulley and the large pulley on the outer side of the motor pulley work together for transmission. By adjusting the installation position of the belt, two transmission speed ratios can be achieved between the spindle pulley and the motor pulley.

[0010] Furthermore, in the aforementioned mini lathe headstock structure, the lathe's switch panel and speed control knob are located on the upper outer side of the headstock, while the lathe's emergency stop button is located on the front outer side of the headstock.

[0011] Furthermore, in the aforementioned mini lathe's spindle box structure, the triangular power supply socket is located on the outer side of the lower rear end of the box, allowing the lathe to be powered via a standard three-hole power cable.

[0012] The advantages of this utility model are: the main spindle box structure is reasonably laid out and compact, which can greatly promote the miniaturization and lightness of the lathe; the tension of the belt can be adjusted by moving the motor up and down, so that the mini lathe can operate reliably; the transmission speed ratio between the main spindle pulley and the motor pulley can be adjusted by adjusting the installation position of the belt, making the mini lathe more versatile; and the protective cover makes the lathe safer. Attached Figure Description

[0013] Figure 1 This is a three-dimensional schematic diagram of the spindle box structure of the mini lathe from one perspective.

[0014] Figure 2 This is a three-dimensional schematic diagram of the spindle box structure of the mini lathe from another perspective.

[0015] Figure 3 This is a three-dimensional schematic diagram of the spindle box structure of the mini lathe after the cover is opened.

[0016] Figure 4 This is a three-dimensional schematic diagram of the spindle box structure of the mini lathe after the cover is opened and the mounting plate is removed.

[0017] Figure 5 This is a schematic diagram of the installation structure of the protective cover. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0019] like Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, the spindle box structure of the mini lathe includes: a housing 1, one side of which is the output side and the other side is the mounting side, with the output and mounting sides facing each other. An opening is provided on the mounting side of the housing 1, and a mounting plate 2 is detachably fixed to the opening by screws. A left-right oriented mounting cylinder 3 is fixed in the upper front part of the housing 1. A spindle 4 is mounted in the mounting cylinder 3 via bearings. One end of the spindle 4 extends from the output side of the housing 1, and a manual chuck 5 for fixing the workpiece is mounted on it. The other end of the spindle 4 passes through the mounting plate 2, and a spindle pulley 6 is fixed on it. A clearance hole 7 is provided on the lower rear side wall of the output side of the housing 1 to allow passage of a motor 9. The top of the motor 9, where the output shaft is located, is locked to a base plate 8 by screws. A screw hole is provided on each of the upper, lower, left, and right edges of the base plate 8. The top of the motor 9 passes through the clearance hole 7 and extends into the housing 1, while the tail end of the motor 9 protrudes from the outside of the housing 1. A ventilated cover 10, which covers the tail end of the motor 9, is threaded onto the output side of the housing 1. Four vertically oriented elongated holes 11 are provided on the mounting plate 2, each corresponding to a screw hole. Four adjusting screws 12 pass through the four elongated holes 11 and are screwed into the four screw holes, allowing the motor 9 to be fixed to the mounting plate 2. The output shaft of the motor 9 passes through the mounting plate 2, and a motor pulley 13 is fixed thereon. A belt 14 drives the main shaft pulley 6 and the motor pulley 13. Loosening the four adjusting screws 12 allows the tension of the belt 14 to be adjusted by moving the motor 9 up and down. A cover 15 is also provided on the mounting side of the housing 1. The rear side of the cover 15 is hinged to the housing 1, allowing the cover 15 to be opened or closed. When closed, the cover 15 protects the opening, mounting plate 2, main shaft pulley 6, and motor pulley 13, and can be locked by a lock. In this embodiment, the lock is a long screw.

[0020] In this embodiment, as Figure 5 As shown, a rotatable, left-right oriented pivot 16 is provided on the output side of housing 1. The inner end of pivot 16 is inserted into housing 1. A transparent cover 17 is provided above manual chuck 5. The rear end of cover 17 is fixed to pivot 16, allowing cover 17 to be flipped via pivot 16. A step 18 is provided on the inner side of cover 17. When cover 17 is flipped downwards to cover manual chuck 5 for protection, step 18 on the inner side of cover 17 will abut against housing 1 to support cover 17. When cover 17 is flipped upwards to a vertical position and does not protect manual chuck 5, the rear end of step 18 on the inner side of cover 17 will abut against housing 1 to limit cover 17.

[0021] The housing 1 contains a micro switch 19, a follower plate 20, and a controller for controlling the motor. The follower plate 20 is located above the micro switch 19 and has a contact 21. The follower plate 20 is fitted onto the inner end of the rotating shaft 16 and can rotate with the rotating shaft 16. When the protective cover 17 covers the manual chuck 5 for protection, the contact 21 will not press to trigger the micro switch 19, and the motor 9 can be started. When the protective cover 17 is driven to flip upward, the follower plate 20 will rotate with the rotating shaft 16, and the contact 21 will press to trigger the micro switch 19 under the influence of the follower plate 20. After the micro switch 19 is triggered, it sends a signal to the controller, which will prevent the motor 9 from starting or immediately stop the working motor 9. This configuration makes the lathe safer to operate.

[0022] A flat surface is provided on the inner end side wall of the rotating shaft 16, and a flat surface is also provided on the inner ring of the follower disk 20. When the follower disk 20 is fitted onto the rotating shaft 16, the two flat surfaces will cooperate, allowing the follower disk 20 to rotate together with the rotating shaft 16 and to move axially along the rotating shaft 16. An abutment shoulder is provided on the rotating shaft 16, located on the outside of the housing 1. The abutment shoulder abuts against the outside of the housing 1 through an outer washer 22 fitted onto the rotating shaft 16. An inner washer 23 and a tightening nut are provided on the inner end of the rotating shaft 16. 24. The inner gasket 23 is fitted onto the rotating shaft 16 and abuts against the shoulder on the inner end of the rotating shaft 16. The tightening nut 24 is threaded onto the rotating shaft 16. After the tightening nut 24 is screwed in, it can lock the inner gasket 23. A spring 25 is fitted onto the rotating shaft 16 between the inner gasket 23 and the follower plate 20. Under the action of the spring 25, the follower plate 20 will come into close contact with the inner side of the housing 1 to increase the friction. The outer gasket 22 will come into close contact with the outer side of the housing 1 to increase the friction. This allows the protective cover 17 to stop at any position within its rotation range by friction after the external force disappears.

[0023] The spindle 4 has a hollow structure. A through hole is provided on the spindle pulley 6 to allow the workpiece to pass. A workpiece hole 26 is provided on the cover 15 to allow the workpiece to pass. A hole cover 27 is provided on the outside of the cover 15 to cover the workpiece hole 26. The upper side of the hole cover 27 is fixed to the cover 15 by screws. After loosening the screws, the hole cover 27 can be moved so that it does not cover the workpiece hole 26. This setting allows the mini lathe to process long workpieces.

[0024] Both the main shaft pulley 6 and the motor pulley 13 are double pulleys. The inner side of the main shaft pulley 6 is a large pulley and the outer side is a small pulley. The outer side of the motor pulley 13 is a large pulley and the inner side is a small pulley. The large pulley on the inner side of the main shaft pulley 6 and the small pulley on the inner side of the motor pulley 13 cooperate for transmission. The small pulley on the outer side of the main shaft pulley 6 and the large pulley on the outer side of the motor pulley 13 cooperate for transmission. By adjusting the installation position of the belt 14, two transmission speed ratios can be achieved between the main shaft pulley 6 and the motor pulley 13.

[0025] The lathe's switch panel 28 and speed control knob 29 are located on the upper outer side of the housing 1, and the lathe's emergency stop button 30 is located on the front outer side of the housing 1.

[0026] The triangular power supply socket 31 is located on the outer side of the lower rear end of the housing 1, allowing the lathe to be powered by a national standard three-hole power cord. This design allows the power cord and the lathe to be separated, making the mini lathe easy to move.

Claims

1. A headstock structure for a mini-lathe, comprising: The housing has an output side on one side and a mounting side on the other, with the output and mounting sides facing each other. Its distinguishing feature is that the mounting side of the housing has an opening, on which a mounting plate is detachably fixed by screws. A left-right oriented mounting cylinder is fixed in the upper front part of the housing, and a main shaft is mounted in the mounting cylinder via bearings. One end of the main shaft extends from the output side of the housing and is fitted with a manual chuck for fixing the workpiece. The other end of the main shaft passes through the mounting plate and is fitted with a main shaft pulley. A clearance hole for the motor is provided on the lower rear side wall of the output side of the housing. The top of the motor, where the motor output shaft is located, is locked to the base plate by screws. Each of the upper, lower, left, and right edges of the base plate has a screw hole. The top of the motor extends into the housing through the clearance hole. The tail end protrudes from the outside of the housing. A vent cover is threaded onto the output side of the housing, covering the tail end of the motor. Four vertically oriented elongated holes are provided on the mounting plate, each corresponding to a screw hole. Four adjusting screws pass through the four elongated holes and are screwed into the four screw holes, allowing the motor to be fixed to the mounting plate. The motor's output shaft passes through the mounting plate, and a motor pulley is fixed on it. The main shaft pulley and the motor pulley are driven by a belt. After loosening the four adjusting screws, the tension of the belt can be adjusted by moving the motor up and down. A cover is also provided on the mounting side of the housing. The rear side of the cover is hinged to the housing, allowing the cover to be opened or closed. When closed, the cover protects the opening, mounting plate, main shaft pulley, and motor pulley, and can be locked with a lock.

2. The spindle head structure of a mini-lathe according to claim 1, characterized in that: A rotatable, left-right oriented shaft is installed on the output side of the housing. The inner end of the shaft is inserted into the housing. A transparent cover is installed above the manual chuck. The rear end of the cover is fixed to the shaft, allowing the cover to be flipped. A step is provided on the inner side of the cover. When the cover is flipped down to cover the manual chuck for protection, the step on the inner side of the cover will abut against the housing to support the cover. When the cover is flipped up to the upright position and does not protect the manual chuck, the rear end of the step on the inner side of the cover will abut against the housing to limit the cover.

3. The spindle head structure of a mini-lathe according to claim 2, characterized in that: The housing contains a micro switch, a follower plate, and a controller for controlling the motor. The follower plate is located above the micro switch and has contacts. The follower plate is fitted onto the inner end of the rotating shaft and can rotate with the shaft. When the protective cover is placed over the manual chuck for protection, the contacts will not press to trigger the micro switch, and the motor can be started. When the protective cover is driven to flip upward, the follower plate will rotate with the shaft, and the contacts will press to trigger the micro switch under the drive of the follower plate. After the micro switch is triggered, it will send a signal to the controller, which will prevent the motor from starting or immediately stop the working motor.

4. The spindle box structure of the mini lathe according to claim 2 or 3, characterized in that: A flat surface is provided on the inner end side wall of the rotating shaft, and a flat surface is also provided on the inner ring of the follower disk. When the follower disk is fitted onto the rotating shaft, the two flat surfaces will cooperate, allowing the follower disk to rotate together with the rotating shaft and to move axially along the rotating shaft. An abutment shoulder is provided on the rotating shaft, located on the outside of the housing. The abutment shoulder abuts against the outside of the housing via an outer gasket fitted onto the rotating shaft. An inner gasket and a retaining device are provided at the inner end of the rotating shaft. Tighten the nut, the inner washer is fitted onto the rotating shaft and abuts against the shoulder on the inner end of the rotating shaft. The tightening nut is threaded onto the rotating shaft. After the tightening nut is screwed in, it can lock the inner washer. A spring is fitted on the rotating shaft between the inner washer and the follower plate. Under the action of the spring, the follower plate will press against the inner side of the box to increase the friction. The outer washer will press against the outer side of the box to increase the friction. This allows the cover to stop at any position within its rotation range by friction after the external force disappears.

5. The spindle box structure of the mini lathe according to claim 1, 2, or 3, characterized in that: The spindle has a hollow structure. There is a through hole on the spindle pulley to allow the workpiece to pass. There is a workpiece hole on the cover to allow the workpiece to pass. There is a hole cover on the outside of the cover to cover the workpiece hole. The upper side of the hole cover is fixed to the cover by screws. After loosening the screws, the hole cover can be moved so that it does not cover the workpiece hole.

6. The spindle box structure of the mini lathe according to claim 1, 2, or 3, characterized in that: Both the main shaft pulley and the motor pulley are double pulleys. The inner side of the main shaft pulley is a large pulley and the outer side is a small pulley. The outer side of the motor pulley is a large pulley and the inner side is a small pulley. The large pulley on the inner side of the main shaft pulley and the small pulley on the inner side of the motor pulley work together for transmission. The small pulley on the outer side of the main shaft pulley and the large pulley on the outer side of the motor pulley work together for transmission. By adjusting the installation position of the belt, two transmission speed ratios can be achieved between the main shaft pulley and the motor pulley.

7. The spindle box structure of the mini lathe according to claim 1, 2, or 3, characterized in that: The lathe's switch panel and speed control knob are located on the upper outer side of the housing, while the lathe's emergency stop button is located on the front outer side of the housing.

8. The spindle box structure of the mini lathe according to claim 1, 2, or 3, characterized in that: The triangular power supply socket is located on the outer side of the lower rear end of the housing, allowing the lathe to be powered via a standard three-hole power cord.

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