CN202137627U

CN202137627U - Electrical main shaft speed reduction device for operation turntable of machine tool

Info

Publication number: CN202137627U
Application number: CN201120218552U
Authority: CN
Inventors: 王凡奇; 汤海锋
Original assignee: ZHEJIANG RIFA DIGITAL PRECISION MACHINERY CO Ltd
Current assignee: Zhejiang Rifa Precision Machinery Co., Ltd.
Priority date: 2011-06-24
Filing date: 2011-06-24
Publication date: 2012-02-08
Anticipated expiration: 2021-06-24

Abstract

The utility model discloses an electric main shaft speed reduction device of an operation turntable of a machine tool, which belongs to components of a cutting machine tool. The prior-art electrical main shaft speed reduction device for the operation turntable of the machine tool has a defect that a transmission mechanism easily leads to vibration of a grating. The electric main shaft speed reduction device comprises the following components: a speed reduction box, a motor, a worm gear, a worm gear shaft and a double-lead worm. The speed reduction box is internally provided with the following components: an inner chamber, a transverse shaft hole and a vertical shaft hole. The transverse shaft hole and the vertical shaft hole are respectively communicated with the inner chamber. The motor is equipped in the speed reduction box. A rotating shaft of the motor is equidirectional with a central line of the transverse shaft hole. The worm is supported by a first bearing and a second bearing and is mounted in the transverse shaft hole. The worm gear shaft is supported by a third bearing and a fourth bearing and is mounted in the vertical shaft hole. The worm gear is equipped on the worm gear shaft. The worm gear and the worm are engaged in the inner chamber. The rotating shaft of the motor is connected with the worm through a coupling. According to the electric main shaft speed reduction device of the operation turntable of the machine tool, double-lead worm-worm-gear pair transmission is adopted for changing direction. Furthermore the electric main shaft speed reduction device has the following advantages: accurate engagement, small transmission clearance, and improved scaling precision of the turntable.

Description

Lathe Work turning table electricity main shaft deceleration device

Technical field

The utility model belongs to the stock-removing machine part field, and is especially relevant with a kind of lathe Work turning table electricity main shaft deceleration device.

Background technology

The rotary table of multi-axis linkage numerical control lathe uses independent electric main shaft drives rotation; Deceleration and steering gear all adopt the meshed transmission gear structure in its deceleration device, and transmission accuracy is not high enough, are prone to cause the vibration of grating chi; Influence the feedback signal of servo-drive system, reduce the machining accuracy of lathe.

The utility model content

The purpose of the utility model is exactly the defective that is prone to cause the vibration of grating chi for the transmission mechanism that overcomes the existence of existing multi-axis linkage numerical control lathe Work turning table electricity main shaft deceleration device, proposes the lathe Work turning table electricity main shaft deceleration device that a kind of reliability is high, transmission accuracy is high.

For this reason, the utility model adopts following technical scheme: lathe Work turning table electricity main shaft deceleration device comprises deceleration box and motor; Be provided with inner chamber, horizontal axis hole and vertical axis hole in the deceleration box; Laterally axis hole is communicated with inner chamber respectively with vertical axis hole, and motor is installed on deceleration box, and machine shaft and lateral shaft centerline hole are in the same way; It is characterized in that: described deceleration device also comprises worm gear, worm-wheel shaft and worm screw; Worm screw is installed in the described horizontal axis hole by the clutch shaft bearing and second bearings, and worm-wheel shaft is installed on described vertical axis hole through the 3rd bearing and the 4th bearings, and worm gear is installed on the worm-wheel shaft; Worm gear and worm screw mesh in described inner chamber, and machine shaft and worm screw are connected by shaft coupling.

As to technique scheme replenish and perfect, the utility model also comprises following technical characterictic.

Described worm screw is two helical pitch worm screws.

Described second bearing is the single-row needle bearing of no inner ring.

Described clutch shaft bearing is a bearing group, is organized back-to-back being installed in the bearing sleeve by two angular contact roller bearings, and bearing sleeve is installed in the described horizontal axis hole.

Turn left from the right side on the worm screw in the described clutch shaft bearing outside and be set with inner spacing collar and locking nut, clutch shaft bearing is played the axial limiting effect.

Be set with outside framework oil seal on the worm screw in described second bearing outside, be set with rotating seal ring on the described inner spacing collar, the deceleration box inner chamber is sealed.

Described deceleration box is made up of main box, installation adjustment tube and support, and described motor is rack-mount, and described the 3rd bearing and the 4th bearing are installed in installs the adjustment tube inner chamber.

Between described the 3rd bearing and the 4th bearing spacer is set, cover is loaded onto seal disc on the worm-wheel shaft of the 3rd bearing upside, and suit lower seal dish on the worm-wheel shaft of the 4th bearing downside seals to adjustment tube inner chamber and main box inner chamber are installed.

Described worm gear upper surface is resisted against described lower seal dish, and the downside end face is resisted against the tensioner cover that is sleeved on the worm-wheel shaft, by tensioner cover and lower seal dish worm gear is carried out axial limiting.

Described worm-wheel shaft top is equipped with output gear, is used for being in transmission connection with rotary table.

Use the utility model can reach following beneficial effect: the utility model adopts two helical pitch worm and wormwheel auxiliary driving to change rotation direction; Engagement is accurate, and drive gap is little, moves more stable; While compactness simple for structure; Easy to adjust, improve the precision of turntable calibration, thereby can guarantee the high manufacturing accuracy of Digit Control Machine Tool.

Description of drawings

Fig. 1 is the front view of the utility model.

Fig. 2 is the A-A cutaway view of Fig. 1.

Fig. 3 is the B-B cutaway view of Fig. 1.

The specific embodiment

Be described in detail below in conjunction with the specific embodiment of accompanying drawing the utility model.

Like Fig. 1～shown in Figure 3; The utility model comprises deceleration box, motor 1, worm gear 14, worm-wheel shaft 13 and worm screw 7, and deceleration box is made up of main box 2, installation adjustment tube 18 and support 4, is provided with inner chamber and horizontal axis hole in the main box 2; Support 4 is installed in main box 2 horizontal axis hole apertures; Adjustment tube 18 is installed vertically is installed on the main box 2, the inner chamber that adjustment tube 18 is installed is as vertical axis hole, and laterally axis hole is communicated with inner chamber respectively with vertical axis hole; Worm screw 7 is two helical pitch worm screws, and worm screw 7 right sections are supported by second bearing 6, and second bearing 6 is the single-row needle bearing of no inner ring, and second bearing 6 is installed in the right section of horizontal axis hole; Worm screw 7 left side sections are supported by clutch shaft bearing 8, and clutch shaft bearing 8 is that two angular contact roller bearings are organized the bearing group to forming back-to-back, and clutch shaft bearing 8 is installed in the bearing sleeve 9, and bearing sleeve 9 is installed in the left side section of horizontal axis hole; Turning left from the right side on the worm screw 7 in clutch shaft bearing 8 outsides is set with inner spacing collar 12 and locking nut 11, and clutch shaft bearing is played the axial limiting effect; Be set with outside framework oil seal 15 on the worm screw 7 in second bearing, 6 outsides, be set with rotating seal ring 10 on the inner spacing collar 12; Worm-wheel shaft 13 supports through the 3rd bearing 17 and the 4th bearing 19 and installs, and the 3rd bearing 17 and the 4th bearing 19 are installed on the inner chamber that adjustment tube 18 is installed, promptly described vertical axis hole; Cover is set between the 3rd bearing 17 and the 4th bearing 19 on the worm-wheel shaft of spacer 22, the three bearings 17 upsides loads onto seal disc 16, worm-wheel shaft 13 upper ends are provided with end face and lean on and take on; Last seal disc 16 upper surfaces are resisted against the end face of worm-wheel shaft upper end by shoulder; By this end face by the shoulder axial limiting, suit lower seal dish 20 on the worm-wheel shaft of the 4th bearing 19 downsides, worm gear 14 is installed on the worm-wheel shaft 13; The upper surface of worm gear 14 is resisted against lower seal dish 20; The lower surface of worm gear 14 is resisted against the tensioner cover 21 that is sleeved on the worm-wheel shaft 13, carries out axial limiting by 21 pairs of worm gears 14 of tensioner cover, and worm gear 13 meshes in main box 2 inner chambers with worm screw 14; Motor is installed on support 4, machine shaft and lateral shaft centerline hole in the same way, the rotating shaft of motor 1 and worm screw 7 are connected by shaft coupling 5; Worm-wheel shaft 13 tops are equipped with output gear 3.

Claims

1. lathe Work turning table electricity main shaft deceleration device; Comprise deceleration box and motor (1); Be provided with inner chamber, horizontal axis hole and vertical axis hole in the deceleration box; Laterally axis hole is communicated with inner chamber respectively with vertical axis hole, and motor (1) is installed on deceleration box, and machine shaft and lateral shaft centerline hole are in the same way; It is characterized in that: described deceleration device also comprises worm gear (14), worm-wheel shaft (13) and worm screw (7); Worm screw (7) is supported by clutch shaft bearing (8) and second bearing (6) and is installed in the described horizontal axis hole, and worm-wheel shaft (13) supports through the 3rd bearing (17) and the 4th bearing (19) and is installed on described vertical axis hole, and worm gear (14) is installed on the worm-wheel shaft (13); Worm gear (14) and worm screw (7) mesh in described inner chamber, and the rotating shaft of motor (1) and worm screw (7) are connected by shaft coupling (5).

2. lathe Work turning table electricity main shaft deceleration device according to claim 1, it is characterized in that: described worm screw (7) is two helical pitch worm screws.

3. lathe Work turning table electricity main shaft deceleration device according to claim 2, it is characterized in that: described second bearing (6) is the single-row needle bearing of no inner ring.

4. lathe Work turning table electricity main shaft deceleration device according to claim 3; It is characterized in that: described clutch shaft bearing (8) is bearing group; Organized back-to-back being installed in the bearing sleeve (9) by two angular contact roller bearings, bearing sleeve (9) is installed in the described horizontal axis hole.

5. lathe Work turning table electricity main shaft deceleration device according to claim 4, it is characterized in that: the worm screw (7) in described clutch shaft bearing (8) outside is upward turned left from the right side and is set with inner spacing collar (12) and locking nut (11).

6. lathe Work turning table electricity main shaft deceleration device according to claim 5; It is characterized in that: be set with outside framework oil seal (15) on the worm screw (7) in described second bearing (6) outside, be set with rotating seal ring (10) on the described inner spacing collar (12).

7. according to claim 2 or 6 described lathe Work turning table electricity main shaft deceleration devices; It is characterized in that: described deceleration box is made up of main box (2), installation adjustment tube (18) and support (4); Described motor (1) is installed on the support (4), and described the 3rd bearing (17) and the 4th bearing (19) are installed in the inner chamber that adjustment tube (18) is installed.

8. lathe Work turning table electricity main shaft deceleration device according to claim 7; It is characterized in that: between described the 3rd bearing (17) and the 4th bearing (19) spacer (22) is set; The worm-wheel shaft (13) of the 3rd bearing (17) upside is gone up cover and is loaded onto seal disc (16), and the worm-wheel shaft (13) of the 4th bearing (19) downside is gone up suit lower seal dish (20).

9. lathe Work turning table electricity main shaft deceleration device according to claim 8, it is characterized in that: described worm gear (14) upper surface is resisted against described lower seal dish (20), and the downside end face is resisted against the tensioner cover (21) that is sleeved on the worm-wheel shaft.

10. lathe Work turning table electricity main shaft deceleration device according to claim 9, it is characterized in that: described worm-wheel shaft (13) top is equipped with output gear (3).