Spindle box structure of mini lathe

Abstract

The spindle box structure comprises a box body, an opening is formed in the mounting side of the box body, a mounting plate is fixed to the opening, a mounting cylinder is fixed to the upper front portion of the box body, a spindle is mounted in the mounting cylinder, a manual chuck is arranged at one end of the spindle, a spindle belt wheel is fixed to the other end of the spindle, and the top end of a motor is locked to a seat plate. Screw holes are formed in the upper, lower, left and right edges of the seat plate, the top end of the motor penetrates through the receding hole to extend into the box body, the output side of the box body is in threaded connection with a ventilation cover covering the tail end of the motor, four long-strip-shaped holes are formed in the mounting plate, and the four long-strip-shaped holes and the four screw holes are in one-to-one correspondence; four adjusting screws penetrate through the four long-strip-shaped holes and then are screwed into the four screw holes respectively, a motor belt wheel is fixed to an output shaft of the motor, the main shaft belt wheel and the motor belt wheel are in transmission through a belt, a box cover is further arranged on the installation side of the box body, and the rear side of the box cover is hinged to the box body. The spindle box structure can promote miniaturization and light weight of a lathe.

Description

Technical Field

[0001] The present invention relates to the field of electric tools, and in particular to a spindle box structure of a mini lathe. Background Art

[0002] Existing conventional lathes are large in size, making them inconvenient to use in classroom teaching. Now there is an urgent need for a mini lathe that is small in size, light in weight, and has roughly the same functions as a conventional lathe. Teaching demonstrations can be carried out by processing plastic parts on a mini lathe. The spindle box structure of the mini lathe is the key to the miniaturization and lightweighting of the lathe. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a spindle box structure of a mini lathe which can promote the miniaturization and lightness of the lathe.

[0004] In order to solve the above problems, the technical solution adopted by the present invention is: a spindle box structure of a mini lathe, comprising: a box body, one side of the box body is the output side, and the other side of the box body is the installation side, the output side and the installation side are opposite to each other on the left and right, and is characterized in that: an opening is provided on the installation side of the box body, and a mounting plate is detachably fixed on the opening by screws, and a mounting cylinder running left and right is fixed in the front upper part of the box body, and a spindle is installed in the mounting cylinder through a bearing, one end of the spindle extends from the output side of the box body, and a manual chuck for fixing the workpiece is installed thereon, the other end of the spindle passes through the mounting plate, and a spindle pulley is fixed thereon, and an avoidance hole for avoiding the motor is provided on the side wall of the output side of the rear lower part of the box body, and the top of the motor where the motor output shaft is located is locked with the base plate by screws, and a screw is provided on the upper, lower, left and right edges of the base plate. The top of the motor extends into the box through the avoidance hole, and the tail end of the motor is exposed to the outside of the box. A breathable cover is threadedly connected to the output side of the box, which covers the outside of the tail end of the motor. Four vertical long holes are provided on the mounting plate, and the four long holes and four screw holes correspond to each other one by one. Four adjusting screws pass through the four long holes and are screwed into the four screw holes respectively, so that the motor can be fixed to the mounting plate. The output shaft of the motor passes through the mounting plate, and a motor pulley is fixed thereon. The spindle pulley and the motor pulley are driven by a belt. After loosening the four adjusting screws, the tightness of the belt can be adjusted by moving the motor up and down. A box cover is also provided on the installation side of the box, and the rear side of the box cover is hinged to the box so that the box cover can be opened or closed. After the box cover is closed, the cover is protected on the opening, the mounting plate, the spindle pulley and the motor pulley, and can be locked by a lock.

[0005] Furthermore, the aforementioned spindle box structure of a mini lathe, wherein: a rotatable, left-right rotating shaft is provided outside the output side of the box body, the inner end of the rotating shaft is inserted into the box body, and a transparent protective cover is provided above the manual chuck, and the rear end of the protective cover is fixed to the rotating shaft so that the protective cover can be flipped through the rotating shaft, and a step is provided on the inner side of the protective cover. When the protective cover is flipped downward to cover the manual chuck for protection, the step inside the protective cover will abut against the box body to support the protective cover, and when the protective cover is flipped upward to an upright state without protecting the manual chuck, the rear end of the step inside the protective cover will abut against the box body to limit the protective cover.

[0006] Furthermore, the aforementioned spindle box structure of a mini lathe, wherein: a micro switch, a follower disk, and a controller for controlling the motor are arranged in the box body, the follower disk is located above the micro switch, and a contact is arranged on the follower disk, and the follower disk is mounted on the inner end of the rotating shaft. The follower disk can rotate with the rotating shaft. When the protective cover is covered above the manual chuck for protection, the contact will not press and trigger the micro switch, and the motor can be started at this time. When the protective cover is driven to flip upward, the follower disk will rotate with the rotating shaft, and the contact will press and trigger the micro switch under the drive of the follower disk. After the micro switch is triggered, it will send a signal to the controller. At this time, the controller will prevent the motor from being started or will stop the working motor immediately.

[0007] Furthermore, the spindle box structure of the aforementioned mini lathe, wherein: 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 driven plate. When the driven plate is mounted on the rotating shaft, the two flat surfaces on the two will cooperate, so that the driven plate can rotate together with the rotating shaft and the driven plate can move axially along the rotating shaft. A shaft shoulder is provided on the rotating shaft, and the shaft shoulder is located on the outside of the box body. The shaft shoulder is abutted against the outside of the box body through an outer gasket mounted on the rotating shaft, and on the inner end head of the rotating shaft An inner gasket and a tightening nut are provided. The inner gasket is fitted on the rotating shaft and abuts against the shoulder on the inner end of the rotating shaft. The tightening nut is threadedly connected to the rotating shaft. After the tightening nut is screwed in, the inner gasket can be locked. A spring is provided on the rotating shaft between the inner gasket and the follower plate. Under the action of the spring, the follower plate will be pressed against the inner side of the box body to increase the friction force, and the outer gasket will be pressed against the outer side of the box body to increase the friction force, so that the shield can be stopped at any position within its flipping range by friction after the external force disappears.

[0008] Furthermore, the aforementioned spindle box structure of a mini lathe, wherein: the spindle is a hollow structure, a through hole for avoiding the workpiece is provided on the spindle pulley, a workpiece hole for avoiding the workpiece is provided on the box cover, and a hole cover covering the workpiece hole is provided on the outer side of the box cover, and the upper side of the hole cover is fixed to the box cover by screws. After loosening the screws, the hole cover can be moved so that the hole cover does not cover the workpiece hole.

[0009] Furthermore, the spindle box structure of the aforementioned mini lathe, wherein: the spindle pulley and the motor pulley are both 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 inside the spindle pulley and the small pulley inside the motor pulley cooperate for transmission, the small pulley outside the spindle pulley and the large pulley outside the motor pulley cooperate for transmission, and by adjusting the installation position of the belt, there are two transmission speed ratios between the spindle pulley and the motor pulley.

[0010] Furthermore, the spindle box structure of the aforementioned mini lathe, wherein: the switch panel and speed control knob of the lathe are arranged on the outer side of the upper end of the box body, and the emergency stop button of the lathe is arranged on the outer side of the front end of the box body.

[0011] Furthermore, the spindle box structure of the aforementioned mini lathe, wherein: the herringbone-shaped power supply socket is arranged on the outer side of the lower rear end of the box body, so that the lathe can be powered by a national standard three-hole power cord.

[0012] The advantages of the present invention are: the spindle box structure has a reasonable layout and compact structure, which can greatly promote the miniaturization and lightweight of the lathe; the tightness of the belt can be adjusted by moving the motor up and down, so that the mini lathe can operate reliably; the mini lathe can adjust the transmission speed ratio between the spindle pulley and the motor pulley by adjusting the installation position of the belt, so that the mini lathe has stronger applicability; the setting of the protective cover makes the lathe safer. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0014] Figure 2 It 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 box cover is opened.

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

[0017] Figure 5 Schematic diagram of the installation structure of the shield. DETAILED DESCRIPTION

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

[0019] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 As shown, the spindle box structure of the mini lathe includes: a box body 1, one side of the box body 1 is the output side, and the other side of the box body 1 is the installation side, the output side and the installation side are opposite to each other on the left and right, and an opening is provided on the installation side of the box body 1, and a mounting plate 2 is detachably fixed on the opening by screws, and a left-right mounting cylinder 3 is fixed in the front upper part of the box body 1, and a spindle 4 is installed in the mounting cylinder 3 through a bearing, one end of the spindle 4 extends from the output side of the box body 1, and a manual chuck 5 for fixing the workpiece is installed thereon, the other end of the spindle 4 passes through the mounting plate 2, and a spindle pulley 6 is fixed thereon, and an avoidance hole 7 for avoiding the motor 9 is provided on the side wall of the output side of the rear lower part of the box body 1, and the top of the motor 9 where the output shaft of the motor 9 is located is locked with the seat plate 8 by screws, and a screw hole is provided on the upper, lower, left and right edges of the seat plate 8, and the top of the motor 9 extends into the box body 1 through the avoidance hole 7, and the tail end of the motor 9 is exposed outside the box body 1 , a breathable cover 10 is threadedly connected to the output side of the box body 1, which covers the outside of the tail end of the motor 9. Four vertical long holes 11 are provided on the mounting plate 2. The four long holes 11 and the four screw holes correspond one to one. Four adjusting screws 12 pass through the four long holes 11 and are screwed into the four screw holes respectively, so that the motor 9 can be fixed on 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. The spindle pulley 6 and the motor pulley 13 are driven by a belt 14. After loosening the four adjusting screws 12, the tightness of the belt 14 can be adjusted by moving the motor 9 up and down. A box cover 15 is also provided on the installation side of the box body 1. The rear side of the box cover 15 is hinged to the box body 1 so that the box cover 15 can be opened or closed. After the box cover 15 is closed, it is protected on the opening, the mounting plate 2, the spindle pulley 6, and the motor pulley 13, and can be locked by a lock. The lock in this embodiment is a long screw.

[0020] In this embodiment, if Figure 5 As shown, a rotatable, left-right rotating shaft 16 is provided on the outside of the output side of the box body 1, and the inner end of the rotating shaft 16 is inserted into the box body 1. A transparent protective cover 17 is provided above the manual chuck 5. The rear end of the protective cover 17 is fixed to the rotating shaft 16, so that the protective cover 17 can be flipped through the rotating shaft 16. A step 18 is provided on the inner side of the protective cover 17. When the protective cover 17 is flipped downward to cover the manual chuck 5 for protection, the step 18 on the inner side of the protective cover 17 will abut against the box body 1 to support the protective cover 17. When the protective cover 17 is flipped upward to an upright state without protecting the manual chuck 5, the rear end of the step 18 on the inner side of the protective cover 17 will abut against the box body 1 to limit the protective cover 17.

[0021] A microswitch 19, a follower disk 20, and a controller for controlling the motor are provided in the housing 1. The follower disk 20 is located above the microswitch 19 and is provided with a contact 21. The follower disk 20 is mounted on the inner end of the rotating shaft 16 and can rotate with the rotating shaft 16. When the shield 17 covers the manual chuck 5 for protection, the contact 21 does not press and trigger the microswitch 19, and the motor 9 can be started. When the shield 17 is driven to flip upward, the follower disk 20 rotates with the rotating shaft 16. The contact 21, driven by the follower disk 20, presses and triggers the microswitch 19. When the microswitch 19 is triggered, it sends a signal to the controller, which then prevents the motor 9 from being started or immediately stops the motor 9. This arrangement makes the lathe safer during operation.

[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 driven plate 20. When the driven plate 20 is mounted on the rotating shaft 16, the two flat surfaces on the two will match, so that the driven plate 20 can rotate together with the rotating shaft 16 and the driven plate 20 can move axially along the rotating shaft 16. A shaft shoulder is provided on the rotating shaft 16, and the shaft shoulder is located on the outside of the box body 1. The shaft shoulder is abutted against the outside of the box body 1 through an outer gasket 22 mounted on the rotating shaft 16. An inner gasket 23 and a tightening nut are provided on the inner end of the rotating shaft 16. 24. The inner gasket 23 is mounted on the rotating shaft 16 and abuts against the shoulder on the inner end of the rotating shaft 16. The tightening nut 24 is threadedly connected to the rotating shaft 16. After the tightening nut 24 is screwed in, the inner gasket 23 can be locked. A spring 25 is mounted on 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 be in close contact with the inner side of the box body 1 to increase the friction force, and the outer gasket 22 will be in close contact with the outer side of the box body 1 to increase the friction force, so that the shield 17 can be stopped at any position within its flip range by friction after the external force disappears.

[0023] The spindle 4 has a hollow structure, and a through hole for avoiding the workpiece is provided on the spindle pulley 6. A workpiece hole 26 for avoiding the workpiece is provided on the box cover 15. A hole cover 27 covering the workpiece hole 26 is provided on the outer side of the box cover 15. The upper side of the hole cover 27 is fixed to the box cover 15 by screws. After loosening the screws, the hole cover 27 can be moved so that the hole cover 27 does not cover the workpiece hole 26. This arrangement enables the mini lathe to process long workpieces.

[0024] The main shaft pulley 6 and the motor pulley 13 are both 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 inside the main shaft pulley 6 and the small pulley inside the motor pulley 13 cooperate for transmission, the small pulley outside the main shaft pulley 6 and the large pulley outside the motor pulley 13 cooperate for transmission, and by adjusting the installation position of the belt 14, there are two transmission speed ratios between the main shaft pulley 6 and the motor pulley 13.

[0025] The switch panel 28 and the speed control knob 29 of the lathe are arranged on the outer side of the upper end of the box body 1 , and the emergency stop button 30 of the lathe is arranged on the outer side of the front end of the box body 1 .

[0026] The herringbone power supply socket 31 is arranged on the outer side of the lower rear end of the box body 1, so that the lathe can be powered by a national standard three-hole power cord. After this arrangement, the power cord and the lathe can be separated, making the mini lathe easy to carry.

Claims

1. A spindle box structure of a mini lathe, comprising: The box body has one side as the output side and the other side as the installation side, and the output side and the installation side are opposite to each other on the left and right, and the characteristics are as follows: an opening is provided on the installation side of the box body, and a mounting plate is detachably fixed on the opening by screws, and a mounting cylinder running left and right is fixed in the front upper part of the box body, and a main shaft is installed in the mounting cylinder through a bearing, and one end of the main shaft extends from the output side of the box body, and a manual chuck for fixing the workpiece is installed thereon, and the other end of the main shaft passes through the mounting plate, and a main shaft pulley is fixed thereon, and an avoidance hole for avoiding the motor is provided on the side wall of the output side of the rear lower part of the box body, and the top of the motor where the motor output shaft is located is locked with the base plate by screws, and a screw hole is provided on the upper, lower, left and right edges of the base plate, and the top of the motor extends into the box body through the avoidance hole, and the motor The tail end is exposed outside the box body, and a breathable cover is threadedly connected to the output side of the box body to cover the outside of the tail end of the motor. Four vertical long holes are provided on the mounting plate, and the four long holes and four screw holes correspond to each other one by one. Four adjusting screws pass through the four long holes and are screwed into the four screw holes respectively, so that the motor can be fixed to the mounting plate. The output shaft of the motor passes through the mounting plate, and a motor pulley is fixed thereon. The spindle pulley and the motor pulley are driven by a belt. After loosening the four adjusting screws, the tightness of the belt can be adjusted by moving the motor up and down. A box cover is also provided on the installation side of the box body, and the rear side of the box cover is hinged to the box body so that the box cover can be opened or closed. After the box cover is closed, the cover is protected on the opening, the mounting plate, the spindle pulley and the motor pulley, and can be locked by a lock.

2. The spindle box structure of a mini lathe according to claim 1, characterized in that: A rotatable, left-right rotating shaft is provided on the outside of the output side of the box body, the inner end of the rotating shaft is inserted into the box body, and a transparent protective cover is provided above the manual chuck, and the rear end of the protective cover is fixed to the rotating shaft so that the protective cover can be flipped over by the rotating shaft. A step is provided on the inner side of the protective cover. When the protective cover is flipped down to cover the manual chuck for protection, the step inside the protective cover will abut against the box body to support the protective cover. When the protective cover is flipped upward to an upright state without protecting the manual chuck, the rear end of the step inside the protective cover will abut against the box body to limit the protective cover.

3. The spindle box structure of a mini lathe according to claim 2, characterized in that: A micro switch, a follower disk, and a controller for controlling the motor are provided in the box. The follower disk is located above the micro switch. A contact is provided on the follower disk. The follower disk is mounted on the inner end of the rotating shaft. The follower disk can rotate with the rotating shaft. When the guard cover is covered above the manual chuck for protection, the contact will not press and trigger the micro switch. At this time, the motor can be started. When the guard cover is driven to flip upward, the follower disk will rotate with the rotating shaft. The contact will press and trigger the micro switch under the drive of the follower disk. After the micro switch is triggered, it will send a signal to the controller. At this time, the controller will prevent the motor from being started or will stop the working motor immediately.

4. The spindle box structure of a 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 driven plate. When the driven plate is mounted on the rotating shaft, the two flat surfaces on the two will match, so that the driven plate can rotate with the rotating shaft and move along the axial direction of the rotating shaft. A shaft shoulder is provided on the rotating shaft, and the shaft shoulder is located outside the box body. The shaft shoulder is abutted against the outside of the box body through an outer gasket mounted on the rotating shaft. An inner gasket and a receiving gasket are provided on the inner end of the rotating shaft. The tightening nut and the inner gasket are fitted on the rotating shaft and abut against the shoulder on the inner end of the rotating shaft. The tightening nut is threadedly connected to the rotating shaft. After the tightening nut is screwed in, the inner gasket can be locked. A spring is fitted on the rotating shaft between the inner gasket and the follower plate. Under the action of the spring, the follower plate will be closely against the inner side of the box to increase the friction force, and the outer gasket will be closely against the outer side of the box to increase the friction force, so that the shield can be stopped at any position within its flipping range by friction after the external force disappears.

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

6. The spindle box structure of a 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 the large pulley and the outer side is the small pulley, the outer side of the motor pulley is the large pulley and the inner side is the small pulley, the large pulley inside the main shaft pulley and the small pulley inside the motor pulley cooperate for transmission, the small pulley outside the main shaft pulley and the large pulley outside the motor pulley cooperate for transmission, by adjusting the installation position of the belt, there are two transmission speed ratios between the main shaft pulley and the motor pulley.

7. The spindle box structure of a mini lathe according to claim 1, 2 or 3, characterized in that: The switch panel and speed regulating knob of the lathe are arranged on the outer side of the upper end of the box body, and the emergency stop button of the lathe is arranged on the outer side of the front end of the box body.

8. The spindle box structure of a mini lathe according to claim 1, 2 or 3, characterized in that: The herringbone power socket is located on the outside of the lower rear end of the box, so that the lathe can be powered by a national standard three-hole power cord.

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