CN201824025U - Transmission mechanism of rack differential gear shaping machine - Google Patents

Abstract

The utility model relates to a transmission mechanism of a gear shaping machine. A rack differential gear shaping machine transmission mechanism, which includes a crank slider mechanism, a worm and worm gear transmission mechanism, and a cutter shaft; it is characterized in that a rack assembly is fixedly installed on the slider of the crank slider mechanism, and the rack The rack of the assembly meshes with the gear of the intermediate transmission device; the first bevel gear of the intermediate transmission device is fixedly installed on the differential main shaft of the differential transmission device; the differential input wheel of the differential transmission device is driven by the second transmission belt or the second The transmission chain is connected with the worm gear transmission wheel in the worm and worm gear transmission mechanism, and the dual output transmission wheel of the differential transmission device is connected with the knife shaft transmission wheel of the knife shaft transmission mechanism through the first transmission belt or the first transmission chain, and the knife shaft transmission mechanism is set on the cutter shaft. The device can not only overcome the defect that the helical guide rail is easy to wear, but also can conveniently meet the needs of processing helical gears with different helix angles.

Description

A rack differential gear shaper transmission mechanism

technical field

The utility model relates to a transmission mechanism of a gear shaping machine, in particular to a transmission mechanism of a gear shaping machine used for processing helical gears (or called helical gears).

Background technique

Helical gears (or helical gears) have the characteristics of smooth transmission, low vibration and noise during the meshing process, and are widely used in high-speed, heavy-duty, and low-noise transmission. Gear shaping is an irreplaceable gear machining method with many advantages.

Gear shaping is a common method for machining helical gears. In addition to the normal motion between the tool shaft and the workpiece, in order to realize the processing of helical gears, the gear shaping tool shaft must have additional rotational motion, and the rotational motion Steering is frequently changed forward and reverse.

At present, regarding the additional rotation of the cutter shaft of the gear shaping machine, the general method is to use a spiral groove and a spiral guide rail, so that the cutter shaft must move along the spiral groove while moving up and down in a straight line, and the cutter shaft is forcibly generated under the action of the spiral groove. Additional rotation in forward and reverse. The main defect of this mechanical spiral groove type additional rotation is: frequent friction between the cutter shaft and the spiral groove, not only the helical guide rail is easy to wear, but also increases power consumption; when changing the helical angle of the processed helical gear, the spiral groove guide rail must be replaced accordingly. It is suitable for processing helical gears with different helix angles.

Contents of the invention

The technical problem to be solved by the utility model is to provide a rack differential type gear shaper transmission mechanism for the shortcomings of the above-mentioned prior art. This mechanism can not only overcome the defect that the spiral guide rail is easy to wear, but also can easily adapt to The need for helical gears with different helix angles.

The technical scheme adopted by the utility model to solve the above-mentioned technical problems is: a rack differential type gear shaping machine transmission mechanism, which includes a crank slider mechanism, a worm gear transmission mechanism, and a cutter shaft; the upper end of the cutter shaft The slider in the crank-slider mechanism is connected by a kinematic pair, and the lower end of the cutter shaft is fixedly equipped with a gear-shaping cutter; the worm wheel and the worm wheel in the worm-worm gear mechanism are both hollowly sleeved on the cutter shaft; it is characterized in that: A rack assembly is fixedly installed on the slider of the slider crank mechanism, and the rack of the rack assembly meshes with the gear of the intermediate transmission device; the first bevel gear of the intermediate transmission device is fixedly installed on the differential main shaft of the differential transmission device The differential input wheel of the differential transmission is connected with the worm wheel in the worm gear transmission mechanism by the second transmission belt or the second transmission chain, and the double output transmission wheel of the differential transmission is passed through the first transmission belt or the first transmission chain It is connected with the cutter shaft transmission wheel of the cutter shaft transmission mechanism, and the cutter shaft transmission mechanism is arranged on the cutter shaft.

The crank-slider mechanism includes a crank plate, a connecting rod, a slider, and a crank shaft. The crank shaft is supported by bearings on the body of the gear shaping machine tool. The crank plate is fixedly mounted on the crank shaft. The crank plate and the crank shaft are perpendicular to each other. One end of the crank rotary shaft is connected to the output shaft of the main motor of the gear shaping machine tool by a coupling or a transmission mechanism, the crank disc is hinged to one end of the connecting rod, the other end of the connecting rod is hinged to one end of the slider, and the slider is installed Set on the gear shaping machine tool body, the slider and the gear shaping machine tool body form a sliding pair.

The intermediate transmission device includes a first pulley, a second pulley, a third transmission belt or a third transmission chain, a first bevel gear, a second bevel gear, a first transmission shaft, a second transmission shaft, gears; the second pulley and The gears are respectively fixed on the second transmission shaft, and the two ends of the second transmission shaft are respectively connected with the gear shaper machine body by bearings, and the gears are meshed with the rack of the rack assembly; the first pulley and the second bevel gear are respectively Fixed on the first transmission shaft, the two ends of the first transmission shaft are respectively connected with the gear shaper machine body by bearings, the second bevel gear meshes with the first bevel gear, and the first bevel gear is fixedly installed on the differential transmission device On the differential main shaft; the first pulley and the second pulley are connected by the third transmission belt or the third transmission chain.

The differential transmission device includes a differential main shaft, a differential main shaft gear, a differential input wheel, a double planetary gear, and a double output wheel. Above, the differential input wheel is connected with the worm wheel in the worm gear transmission mechanism by the second transmission belt or the second transmission chain; the supporting shaft of the double planetary gear is fixedly installed on the wheel body of the differential input wheel, and the double planetary gear Composed of the first planetary gear and the second planetary gear, the first planetary gear of the double planetary gear meshes with the differential main shaft gear, the second planetary gear of the double planetary gear meshes with the double output wheel, and the double output wheel It is fixedly connected with the double output transmission wheel, the double output wheel and the double output transmission wheel are sleeved on the differential main shaft, and the double output transmission wheel is connected with the cutter shaft transmission wheel through the first transmission belt or the first transmission chain.

The worm gear transmission mechanism comprises a worm gear transmission wheel, a worm gear, and a worm screw. The worm gear and the worm gear transmission wheel are fixedly connected.

The knife shaft transmission mechanism includes a sliding sleeve and a knife shaft transmission wheel. A sliding sleeve is fixedly installed on the knife shaft. The knife shaft transmission wheel is sleeved on the sliding sleeve. The upper slider is located in the chute.

The utility model abandons the spiral groove type spiral guide rail, and adopts the positive transmission mechanism of the rack differential type to realize the additional rotation of the cutter shaft and the combined movement of the cutter shaft and the workpiece.

The beneficial effects of the utility model are: (1) the frequent friction between the traditional mechanical spiral groove guide rail and the cutter shaft is eliminated, and the defect that the spiral guide rail is easy to wear is overcome; (2) the helical angle of the processed helical gear can be easily changed, It can be realized only by changing the transmission ratio of the first pulley and the second pulley, or changing the transmission ratio of the first bevel gear and the second bevel gear, which is convenient for production, and the utility model can be easily adapted to process different helix angles The need for helical gears. (3) Due to the use of mechanical transmission, the synchronization of each movement is good, and the control system of the gear shaping machine is simplified.

Description of drawings

Fig. 1 is a structural schematic diagram of an embodiment of the utility model.

In Figure 1: 1 is the crank plate, 2 is the connecting rod, 3 is the body of the gear shaping machine tool, 4 is the slider, 5 is the rack assembly, 6 is the motion pair, 7 is the worm gear drive wheel, 8 is the worm wheel, and 9 is the Worm, 10 is the cutter shaft transmission wheel, 11 is the sliding sleeve; 12 is the cutter shaft, 13 is the gear shaper cutter, 14 is the first transmission belt or the first transmission chain, 15 is the first planetary gear, 16 is the second planetary gear, 17 is the planetary gear shaft, 18 is the double output gear, 19 is the double output transmission wheel, 20 is the differential main shaft of the differential transmission device, 21 is the differential main shaft gear, 22 is the wheel body of the differential input wheel, 23 24 is the second transmission belt or the second transmission chain, 25 is the first bevel gear, 26 is the second bevel gear, 27 is the first pulley, 28 is the first transmission shaft, and 29 is the third transmission belt Or the 3rd transmission chain, 30 is the second pulley, 31 is the gear, 32 is the second transmission shaft, and 33 is the crank rotary shaft.

Detailed ways

Further illustrate the embodiment of the present utility model below in conjunction with accompanying drawing.

Example 1:

As shown in Figure 1, a rack and differential gear shaping machine transmission mechanism includes a crank slider mechanism, a rack assembly 5, an intermediate transmission device, a differential transmission device, a worm and worm gear transmission mechanism, a cutter shaft, a cutter Shaft drive mechanism;

The slider crank mechanism comprises a crank disc 1, a connecting rod 2, a slide block 4, and a crank shaft 33. The crank shaft 33 is supported by bearings on the gear shaping machine tool body 3 (the crank shaft 33 can rotate), and the crank disc 1 is fixed. Installed on the crank shaft 33, the crank disc 1 and the crank shaft 33 are perpendicular to each other, and one end of the crank shaft 33 is connected with the output shaft of the main motor of the gear shaping machine tool by a coupling or a transmission mechanism (the crank disc is controlled by the main motor of the gear shaping machine tool. Driven by a motor, the main motor of the gear shaping machine tool is arranged on the gear shaping machine tool body 3), the crank disc 1 is hingedly connected with one end of the connecting rod 2, and the other end of the connecting rod 2 is hingedly connected with one end of the slider 4, and the slider 4 is installed Set on the gear shaper machine body 3, the slide block 4 and the gear shaper machine body 3 form a sliding pair (that is, the gear shaper machine body 3 is provided with a chute, the slide block 4 is located in the chute, and the slide block 4 can move along the chute for linear motion).

A rack assembly 5 is fixedly installed on the slider 4 of the slider crank mechanism;

The intermediate transmission device includes a first pulley 27, a second pulley 30, a third transmission belt or a third transmission chain 29, a first bevel gear 25, a second bevel gear 26, a first transmission shaft 28, a second transmission shaft 32, Gear 31; the second pulley 30 and gear 31 are respectively fixed on the second transmission shaft 32, and the two ends of the second transmission shaft 32 are respectively connected with the gear shaping machine tool body 3 by bearings (that is, the second transmission shaft 32 can rotate ), the gear 31 meshes with the rack of the rack assembly 5; the first pulley 27 and the second bevel gear 26 are respectively fixed on the first transmission shaft 28, and the two ends of the first transmission shaft 28 are respectively connected by the bearing and the plug The gear machine body 3 is connected (that is, the first transmission shaft 28 can rotate), the second bevel gear 26 is meshed with the first bevel gear 25, and the first bevel gear 25 is fixedly installed on the differential main shaft 20 of the differential transmission; The first pulley 27 and the second pulley 30 are connected by the third transmission belt or the third transmission chain 29 (the slider 4 moves up and down to drive the gear 31 to rotate, thereby driving the second pulley 30 to rotate, through the third transmission belt or the third transmission The chain 29 drives the first pulley 27 to rotate until the differential main shaft 20 of the differential transmission rotates);

The differential transmission device includes a differential main shaft 20, a differential main shaft gear 21, a differential input wheel 23, a double planetary gear, and a double output wheel 18. The differential main shaft gear 21 is fixedly installed on the differential main shaft 20, and the differential input The wheel 23 is vacantly sleeved on the differential main shaft 20, and the differential input wheel 23 is connected to the worm gear drive wheel 7 in the worm and worm gear mechanism by the second transmission belt or the second transmission chain 24 (the motion of the differential input wheel 23 is driven by the worm and worm gear. The worm gear transmission wheel 7 in the mechanism is driven by the second transmission belt or the second transmission chain); the support shaft of the double planetary gear is fixedly installed on the wheel body 22 of the differential input wheel, and the double planetary gear is driven by the first planetary gear 15 Composed of the second planetary gear 16, the first planetary gear 15 of the double planetary gear meshes with the differential main shaft gear 21, the second planetary gear 16 of the double planetary gear meshes with the double output wheel 18, and the double output wheel 18 is fixedly connected with duplex output transmission wheel 19, and duplex output transmission wheel 18 and duplex output transmission wheel 19 are sleeved on the differential main shaft 20, and duplex output transmission wheel 19 passes through the first transmission belt or the first transmission chain 14 and the cutter Shaft transmission wheel 10 links to each other (drives cutter shaft transmission wheel);

The worm gear transmission mechanism comprises a worm wheel 7, a worm wheel 8, and a worm screw 9, and the worm wheel 8 is fixedly connected with the worm wheel 7, and the worm wheel 8 and the worm wheel 7 are all set on the cutter shaft 12 (can rotate around the cutter shaft 12), The worm 9 is meshed with the worm wheel 8 (the movement of the worm is driven by the motor of the machine tool and its transmission mechanism);

The upper end of the cutter shaft 12 is connected with the slider 4 in the slider crank mechanism by a kinematic pair 6 (spherical pair, universal joint) (the cutter shaft can rotate around its own axis), and the lower end of the cutter shaft 12 is fixedly installed with gear shaper cutter 13;

Cutter shaft transmission mechanism comprises sliding sleeve 11, cutter shaft driving wheel 10, is fixedly installed with sliding sleeve 11 on the cutter shaft 12, and cutter shaft driving wheel 10 is enclosed within on the sliding sleeve 11, and the axial direction of cutter shaft 12 is arranged on the sliding sleeve 11. There is a chute, and the slider on the cutter shaft drive wheel 10 is located in the chute (the cutter shaft drive wheel 10 and the sliding sleeve 11 can slide linearly, and the cutter shaft drive wheel 10 can drive the sliding sleeve 11 and the cutter shaft 12 rotate together).

In Fig. 1, when the crank shaft 33 drives the crank disc 1 to rotate, the connecting rod 2 drives the slider 4 and the rack assembly 5 to move up and down, the gear 31 meshes with the rack assembly 5 to produce a rotational movement, and the second pulley 30 and The gear 31 is installed on the second transmission shaft 32, and the first pulley 27 is rotated through the third transmission belt or the third transmission chain 29, and then the second bevel gear 26 and the first bevel gear 25 drive the differential transmission. The differential main shaft 20 and the differential main shaft gear 21 rotate;

Simultaneously, the fanning motion of the machine tool is driven by the motor through a series of transmission devices to drive the worm 9 to move, and the fanning motion is transmitted to the differential through the worm wheel 8, the worm gear wheel 7, the second transmission belt or the second transmission chain 24, and the differential input wheel 23. in the transmission;

In this way, the differential transmission synthesizes the reciprocating rotational motion of the differential main shaft 20 and the rotational motion of the differential input wheel 23, and the combined motion is output by the dual output transmission wheels 19 of the differential transmission, through the first transmission belt or The first transmission chain 14 drives the cutter shaft transmission wheel 10 to rotate, and then drives the cutter shaft 12 and the gear shaping cutter 13 to move through the sliding sleeve 11 to complete the gear shaping process. Wherein, along with the up and down reciprocating motion of the slider and the cutter shaft, the differential spindle 20 produces a reciprocating rotational motion, realizing the additional reciprocating rotational motion of the gear shaping machine tool. By changing the transmission ratio of the third transmission belt or the third transmission chain 29, the second bevel gear 26, or changing the transmission ratio of the first bevel gear 25, the second transmission belt or the second transmission chain 24, the additional reciprocating rotation can be changed. Speed, so as to meet the needs of processing helical gears with different helix angles (helical gears are not drawn in Figure 1, helical gears are helical gears).

Example 2:

It is basically the same as Embodiment 1, except that the cutter shaft transmission mechanism includes a sliding sleeve 11 and a cutter shaft driving wheel 10, the sliding sleeve 11 is fixedly installed on the cutter shaft 12, and the cutter shaft driving wheel 10 is sleeved on the sliding sleeve 11, Sliding sleeve 11 is provided with key or protruding slide block along the axial direction of cutter shaft 12, is provided with chute in the hole on the cutter shaft transmission wheel 10, and key or protruding slide block is positioned at chute (cutter shaft transmission Both the wheel 10 and the sliding sleeve 11 can slide linearly, and simultaneously the cutter shaft drive wheel 10 can drive the sliding sleeve 11 and the cutter shaft 12 to rotate together).

Claims (7)

1. A rack and differential type gear shaping machine transmission mechanism, which includes a slider crank mechanism, a worm and worm gear mechanism, and a cutter shaft; the upper end of the cutter shaft (12) and the slider (4) in the slider crank mechanism ) is connected by the kinematic pair (6), and the lower end of the cutter shaft (12) is fixedly equipped with a gear shaper cutter (13); the worm wheel (7) and the worm wheel (8) in the worm and worm gear transmission mechanism are both hollowly sleeved on the cutter shaft (12); it is characterized in that: a rack assembly (5) is fixedly installed on the slider (4) of the slider crank mechanism, and the rack of the rack assembly (5) meshes with the gear (31) of the intermediate transmission The first bevel gear (25) of the intermediate transmission is fixedly installed on the differential main shaft (20) of the differential transmission; the differential input wheel (23) of the differential transmission is driven by the second transmission belt or the second transmission chain ( 24) It is connected with the worm wheel (7) in the worm gear transmission mechanism, and the dual output transmission wheel (19) of the differential transmission device is connected with the cutter shaft of the cutter shaft transmission mechanism through the first transmission belt or the first transmission chain (14). The transmission wheel (10) is connected, and the cutter shaft transmission mechanism is arranged on the cutter shaft (12). 2. A rack differential gear shaping machine transmission mechanism according to claim 1, characterized in that: the crank-slider mechanism comprises a crank plate (1), a connecting rod (2), a slider (4), a crank The rotary shaft (33), the crank rotary shaft (33) is supported on the gear shaping machine tool body (3) by the bearing, the crank disc (1) is fixedly installed on the crank rotary shaft (33), the crank disc (1) and the crank return The rotating shafts (33) are perpendicular to each other, and one end of the crank rotating shaft (33) is connected with the output shaft of the main motor of the gear shaping machine tool by a coupling or transmission mechanism, and the crank disc (1) is hingedly connected with one end of the connecting rod (2). The other end of the rod (2) is hingedly connected with one end of the slide block (4). form a sliding pair. 3. A rack differential gear shaping machine transmission mechanism according to claim 1, characterized in that: the intermediate transmission device comprises a first pulley (27), a second pulley (30), a third transmission belt or The third transmission chain (29), the first bevel gear (25), the second bevel gear (26), the first transmission shaft (28), the second transmission shaft (32), the gear (31); the second pulley ( 30) and the gear (31) are respectively fixed on the second transmission shaft (32), and the two ends of the second transmission shaft (32) are respectively connected with the gear shaper machine body (3) by bearings, and the gear (31) and the gear The racks of the bar assembly (5) are meshed; the first pulley (27) and the second bevel gear (26) are respectively fixed on the first transmission shaft (28), and the two ends of the first transmission shaft (28) are respectively The bearing is connected with the gear shaping machine body (3), the second bevel gear (26) meshes with the first bevel gear (25), and the first bevel gear (25) is fixedly installed on the differential main shaft ( 20) on: the first pulley (27) and the second pulley (30) are connected by the third transmission belt or the third transmission chain (29). 4. A rack differential gear shaping machine transmission mechanism according to claim 1, characterized in that: the differential transmission device includes a differential main shaft (20), a differential main shaft gear (21), a differential input wheel (23), double planetary gears, double output wheels (18), the differential main shaft gear (21) is fixedly installed on the differential main shaft (20), and the differential input wheel (23) is empty sleeved on the differential main shaft (20) ), the differential input wheel (23) is connected with the worm wheel (7) in the worm gear transmission mechanism by the second transmission belt or the second transmission chain (24); the supporting shaft of the double planetary gear is fixedly installed on the differential input On the wheel body (22) of the wheel, the double planetary gear is composed of a first planetary gear (15) and a second planetary gear (16), and the first planetary gear (15) of the double planetary gear and the differential main shaft gear (21 ), the second planetary gear (16) of the duplex planetary gear meshes with the duplex output wheel (18), and the duplex output wheel (18) is fixedly connected with the duplex output drive wheel (19), and the duplex output wheel (18) and the dual output transmission wheel (19) are empty sleeves on the differential main shaft (20), and the dual output transmission wheel (19) is connected to the cutter shaft transmission wheel (10) through the first transmission belt or the first transmission chain (14) ) connected. 5. A rack differential gear shaping machine transmission mechanism according to claim 1, characterized in that: the worm and worm gear transmission mechanism comprises a worm wheel (7), a worm wheel (8), a worm (9), a worm wheel ( 8) It is fixedly connected with the worm gear (7), and both the worm gear (8) and the worm gear (7) are hollowly sleeved on the cutter shaft (12), and the worm (9) is meshed with the worm gear (8). 6. A rack differential gear shaping machine transmission mechanism according to claim 1, characterized in that: the cutter shaft transmission mechanism comprises a sliding sleeve (11), a cutter shaft drive wheel (10), a cutter shaft (12) A sliding sleeve (11) is fixedly installed on the top, and the cutter shaft driving wheel (10) is sleeved on the sliding sleeve (11). The sliding sleeve (11) is provided with a chute along the axial direction of the cutter shaft (12), and the cutter shaft driving wheel The slide block on (10) is located in the chute. 7. A rack differential gear shaping machine transmission mechanism according to claim 1, characterized in that: the cutter shaft transmission mechanism comprises a sliding sleeve (11), a cutter shaft drive wheel (10), a cutter shaft (12) A sliding sleeve (11) is fixedly installed on the top, the cutter shaft drive wheel (10) is sleeved on the sliding sleeve (11), and the sliding sleeve (11) is provided with a key or a raised slider along the axial direction of the cutter shaft (12) , the hole on the cutter shaft drive wheel (10) is provided with a chute, and the key or raised slide block is located in the chute.