Clamping device for embedded belt pulley and main shaft of lathe

Abstract

The utility model discloses a clamping device for an embedded belt pulley and a spindle of a lathe, which relates to the technical field of machine tool manufacture and comprises a spindle box, a machine tool body, a machine tool motor and a transmission belt, an outer shell is fixedly mounted on the spindle box, an inner support frame is fixedly mounted in the outer shell, a plurality of swing rods are rotatably mounted on the inner support frame, and the swing rods are fixedly mounted on the machine tool body. An elastic torsional spring is fixedly installed on the swing rod, the other end of the elastic torsional spring is fixedly installed on the inner supporting frame, elastic wheels are rotatably installed on the swing rod, the elastic wheels make contact with the side, not provided with protruding teeth, of the transmission belt, the elastic wheels are symmetrically arranged on the two sides of the inner supporting frame, and the elastic wheels are used for pressing the transmission belt. According to the device, the elastic wheel is matched with the elastic torsional spring to extrude the transmission belt, so that the tightness of the transmission belt in use can be kept, meanwhile, the wrap angle of the transmission belt in use can be enlarged, and the transmission belt can transmit power more stably.

Description

Technical Field

[0001] The utility model relates to the technical field of machine tool manufacturing, in particular to a clamping device for an embedded pulley and a main shaft of a lathe. Background Art

[0002] In the field of machine tool manufacturing, lathes are widely used as processing equipment. Their working efficiency and precision are crucial to the production process. The spindle and motor of the lathe are usually connected by pulleys. However, the transmission belt may become loose, difficult to adjust, and severely worn during long-term use, thereby affecting the transmission force and the overall performance of the lathe.

[0003] The Chinese invention patent, with announcement number CN107947441B, discloses an automatic tension adjustment device for the motor belt of an oil pumping unit. The device can automatically move and adjust the tension between the motor and belt of various types of oil pumping units. It can also be used to automatically move and adjust the belts of various large motors in other places of use.

[0004] In the prior art, the belt tightness is generally adjusted by replacing the belt or slightly adjusting the motor, which takes a lot of time and affects the working efficiency of the machine tool. Utility Model Content

[0005] In view of the above technical problems, the present invention proposes the following solutions:

[0006] The driving mechanism that the cam is mounted on the driving mechanism, and the transmission gear of the cam is mounted on a link cam of the driving mechanism. The cam is mounted on a link cam of the driving mechanism. The cam is mounted on a

[0007] Furthermore, a passive shaft is fixedly mounted on the input shaft of the main spindle box, an external spline is provided on the passive shaft, a large pulley is slidably mounted on the passive shaft, a covering ring on the inner support frame is arranged in the large pulley for protection, the covering ring does not contact the large pulley, an internal spline is provided on the large pulley, the internal spline on the large pulley fits with the external spline on the passive shaft, a plurality of upper bolts are provided on the large pulley, the upper bolts are threadedly connected to the large pulley, and the upper bolts are also threadedly connected to the passive shaft.

[0008] Furthermore, a driving shaft is fixedly mounted on the output shaft of the machine tool motor, a motor pulley is slidably mounted on the driving shaft, the protective baffle on the inner support frame does not contact the motor pulley, a sliding key is provided between the driving shaft and the motor pulley, a plurality of lower bolts are provided on the motor pulley, the lower bolts are threadedly connected to the motor pulley, and the lower bolts are also threadedly connected to the driving shaft.

[0009] Furthermore, a passive tooth groove is provided outside the large pulley, and a driving tooth groove is provided outside the motor pulley. One end of the transmission belt is provided on the large pulley, and the other end of the transmission belt is provided on the motor pulley for transmitting power. The side of the transmission belt that contacts the outer surface of the large pulley and the motor pulley is provided with protruding teeth. The protruding teeth on the transmission belt can be matched with the passive tooth groove, and the protruding teeth on the transmission belt can also be matched with the driving tooth groove.

[0010] Compared with the prior art, the present invention has the following advantages: (1) the present device uses an elastic pulley in conjunction with an elastic torsion spring to squeeze the transmission belt, which can maintain the tightness of the transmission belt during use, and at the same time increase the wrap angle of the transmission belt during use, so that the transmission belt can transmit power more stably; (2) the present device uses splines and sliding keys to prevent the large pulley and the motor pulley from falling off or the upper bolt and lower bolt from breaking during use and installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0012] Figure 2 This is a schematic diagram of the cross-section structure of the housing 102 of the present invention.

[0013] Figure 3 It is a structural diagram of the swing rod 209 of the present invention.

[0014] Figure 4 This is a schematic structural diagram of the passive shaft rod 203 of the present invention.

[0015] Figure 5This is a structural diagram of the elastic pulley 210 of the present invention.

[0016] Figure 6 It is a schematic diagram of the cross-section structure of the housing 102, the inner support frame 201, the large pulley 202, the transmission belt 204, and the motor pulley 207 of the present invention.

[0017] Figure numerals: 101-spindle box; 102-housing; 103-machine tool bed; 104-machine tool motor; 201-inner support frame; 202-large pulley; 203-passive shaft; 204-transmission belt; 205-upper bolt; 206-active shaft; 207-motor pulley; 208-lower bolt; 209-swing rod; 210-tension pulley; 211-tension and torsion spring. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0019] like Figures 1 to 6 As shown, a clamping device for an embedded pulley and a main shaft of a lathe comprises a spindle box 101, a machine tool bed 103, and a machine tool motor 104. The spindle box 101 is fixedly connected to the machine tool bed 103, and the machine tool motor 104 is fixedly connected to the machine tool bed 103. A passive shaft 203 is fixedly mounted on the input shaft of the spindle box 101, and an external spline is provided on the passive shaft 203. A large pulley 202 is slidably mounted on the passive shaft 203, and an internal spline is provided on the large pulley 202. The internal spline on the large pulley 202 fits with the external spline on the passive shaft 203. 02 is provided with multiple upper bolts 205, and the upper bolts 205 are connected to the large pulley 202 by threads, and the upper bolts 205 are also connected to the passive shaft 203 by threads. A driving shaft 206 is fixedly installed on the output shaft of the machine tool motor 104, and a motor pulley 207 is slidably installed on the driving shaft 206. A sliding key is provided between the driving shaft 206 and the motor pulley 207, and multiple lower bolts 208 are provided on the motor pulley 207, and the lower bolts 208 are connected to the motor pulley 207 by threads, and the lower bolts 208 are also connected to the driving shaft 206 by threads.

[0020] like Figures 2 to 6As shown, a transmission belt 204 is provided on the large pulley 202, and the other end of the transmission belt 204 is provided on the motor pulley 207 for transmitting power. A passive tooth groove is provided on the outside of the large pulley 202, and a driving tooth groove is provided on the outside of the motor pulley 207. The side of the transmission belt 204 that contacts the outer surface of the large pulley 202 and the motor pulley 207 is provided with protruding teeth. The protruding teeth on the transmission belt 204 can be matched with the passive tooth groove, and the protruding teeth on the transmission belt 204 can also be matched with the driving tooth groove.

[0021] like Figures 2 to 6 As shown, the spindle box 101 is fixedly mounted with a shell 102, and an opening and closing door is provided on the shell 102 for installation and maintenance. The shell 102 is fixedly connected to the spindle box 101 by screws, and an inner support frame 201 is fixedly mounted in the shell 102. A covering ring is fixedly mounted on one end of the inner support frame 201, and the covering ring is arranged in the large pulley 202 for protection. The covering ring does not contact the large pulley 202, and a protective baffle is provided on the other end of the inner support frame 201 for protection. The protective baffle does not contact the motor pulley 207. A plurality of swing rods 209 are rotatably mounted on the inner support frame 201, and an elastic torsion spring 211 is fixedly mounted on the swing rod 209. The other end of the elastic torsion spring 211 is fixedly mounted on the inner support frame 201. An elastic wheel 210 is rotatably mounted on the swing rod 209. The elastic wheel 210 contacts the side of the transmission belt 204 where no protruding teeth are provided. The elastic wheels 210 are symmetrically arranged on both sides of the inner support frame 201. The elastic wheels 210 are used to press the transmission belt 204 to increase the wrap angle of the transmission belt 204 on the large pulley 202 and the motor pulley 207 when in use.

[0022] The upper bolt 205 only bears the axial force, and then the transmission belt 204 is installed, so that the protruding teeth on the transmission belt 204 fit into the passive tooth grooves on the large pulley 202. After that, the protruding teeth on the transmission belt 204 are matched with the driving tooth grooves on the motor pulley 207. When the transmission belt 204 is installed here, the transmission belt 204 can be loosened a little, and the housing 102 is installed later. After the housing 102 is installed, the housing 102 is first fixed to the spindle box 101 by screws. Then, the opening and closing door on the housing 102 is opened. The covering ring and the protective baffle of the inner support frame 201 must be aligned with the large pulley 202 and the motor pulley 207. At the same time, the tension wheel 210 must be adjusted so that the tension wheel 210 is located outside the transmission belt 204. In this way, the tension wheel 210 can squeeze the transmission belt 204 through the tension torsion spring 211, so that the transmission belt 204 is in a taut state and the wrap angle of the transmission belt 204 can be increased. When the tightness of the transmission belt 204 needs to be adjusted, the tension torsion spring 211 needs to be replaced, so that the strength of the tension torsion spring 211 can be changed.

[0023] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A clamping device for an embedded pulley and a main shaft of a lathe, comprising a spindle box (101), a machine tool bed (103), a machine tool motor (104), and a transmission belt (204), wherein the spindle box (101) is fixedly connected to the machine tool bed (103), and the machine tool motor (104) is fixedly connected to the machine tool bed (103), and characterized in that: The spindle box (101) is fixedly mounted with a housing (102), and an opening and closing door is provided on the housing (102) for installation and maintenance. An inner support frame (201) is fixedly mounted in the housing (102), a covering ring is fixedly mounted on one end of the inner support frame (201), and a protective baffle is provided on the other end of the inner support frame (201) for protection. A plurality of swinging rods (209) are rotatably mounted on the inner support frame (201), and the swinging rods (209) are fixedly mounted A tension torsion spring (211) is provided, the other end of the tension torsion spring (211) is fixedly mounted on the inner support frame (201), an elastic wheel (210) is rotatably mounted on the swing rod (209), the elastic wheel (210) contacts the side of the transmission belt (204) where no protruding teeth are provided, the elastic wheels (210) are symmetrically arranged on both sides of the inner support frame (201), and the elastic wheels (210) are used to press the transmission belt (204) to increase the wrap angle of the transmission belt (204) when in use.

2. The clamping device for the embedded pulley and the main shaft of a lathe according to claim 1, characterized in that: A passive shaft (203) is fixedly mounted on the input shaft of the spindle box (101), an external spline is provided on the passive shaft (203), a large pulley (202) is slidably mounted on the passive shaft (203), a covering ring on the inner support frame (201) is arranged in the large pulley (202) for protection, the covering ring does not contact the large pulley (202), an internal spline is provided on the large pulley (202), the internal spline on the large pulley (202) is matched with the external spline on the passive shaft (203), a plurality of upper bolts (205) are provided on the large pulley (202), the upper bolts (205) are connected to the large pulley (202) by thread, and the upper bolts (205) are also connected to the passive shaft (203) by thread.

3. The clamping device for the embedded pulley and the main shaft of a lathe according to claim 2, characterized in that: A driving shaft (206) is fixedly mounted on the output shaft of the machine tool motor (104); a motor pulley (207) is slidably mounted on the driving shaft (206); a protective baffle on the inner support frame (201) does not contact the motor pulley (207); a sliding key is provided between the driving shaft (206) and the motor pulley (207); a plurality of lower bolts (208) are provided on the motor pulley (207); the lower bolts (208) are connected to the motor pulley (207) by threads, and the lower bolts (208) are also connected to the driving shaft (206) by threads.

4. The clamping device for the embedded pulley and the main shaft of a lathe according to claim 3, characterized in that: The large pulley (202) is provided with a passive tooth groove outside, and the motor pulley (207) is provided with a driving tooth groove outside. One end of the transmission belt (204) is provided on the large pulley (202), and the other end of the transmission belt (204) is provided on the motor pulley (207) for transmitting power. The side of the transmission belt (204) that contacts the outer surfaces of the large pulley (202) and the motor pulley (207) is provided with protruding teeth. The protruding teeth on the transmission belt (204) can fit with the passive tooth groove, and the protruding teeth on the transmission belt (204) can also fit with the driving tooth groove.

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