CN207131810U - Inner planet gear transmission mechanism and the pipe mill with the transmission mechanism - Google Patents

Abstract

The utility model provides an inner planetary gear transmission mechanism, which comprises a sliding guide groove, a frame slider, an inner gear, a planetary gear, a driving rod, a driven rod, a motor, an inner balance block and an outer balance block; the planetary gear and the inner gear Internal meshing, the number of teeth of the internal gear is an even number, and the pitch circle radius is twice the pitch circle radius of the planetary gear; the middle part of the driving rod is provided with a rotating shaft, which is perpendicular to the center of the internal gear and is keyed to the output shaft of the motor. One end is hinged with the center of the driven rod and the center of the planetary gear at the same time, and the other end is connected with the outer balance weight; one end of the driven rod is hinged with the rack slider, and the other end is connected with the inner balance weight; the rack slider can slide along the The guide groove reciprocates; the distance from the hinge point of the driven rod and the frame slider to the center of the planetary gear is equal to the radius of the pitch circle of the planetary gear. The transmission mechanism of the utility model is used in a pipe rolling mill, which prolongs the working life, improves the running speed, precision and stability, saves energy and reduces noise at the same time.

Description

Inner planetary gear transmission mechanism and pipe rolling mill with the transmission mechanism

technical field

The utility model relates to a transmission mechanism, in particular to an inner planetary gear transmission mechanism and a pipe rolling mill with the transmission mechanism.

Background technique

The working stroke of the current cold-rolled pipe mill frame slider is mostly completed by the crank-link mechanism in which the crankshaft or the crank rotates to drive the connecting rod to complete the reciprocating motion of the frame slider. It is the same as a steam locomotive, but with a slight increase in speed, a large counterweight must be added.

As shown in Figure 1, it is a schematic diagram of the crank linkage mechanism in the prior art (this figure is a side view), the frame slider 2' moves back and forth on the slide rail 1', when the crank 4', the balance weight 5' Rotate clockwise around point A', and point B' also makes a clockwise circular motion around point A', and drives the connecting rod 3', so that point C' at the other end of the connecting rod 3' drives the frame slider 2' to make a straight line For reciprocating motion, the working stroke S' is 2*A'B', where A'B' is the straight-line distance from point A' to point B', so that the point B' of the connecting rod 3' is converted from circular motion to C' Point linear motion is completely guided by the frame slider 2' and the sliding guide rail 1', so that the component force between the power direction and the moving direction is generated. There is a large friction force between the guide rail surface and the slider surface, and the friction force is not only It generates a lot of heat and consumes energy, which accelerates the wear of the slide rail 1', and the shaft of the crank 4' is installed horizontally, as shown in point A' in Figure 1. During operation, the balance weight 5' and the connecting rod 3' One end of the pipe moves vertically up and down, which consumes a lot of energy and has large impact fluctuations. This force and moment will cause strong vibration and noise of the cold rolling mill, aggravate the wear and fatigue failure of the parts, and reduce the movement accuracy and accuracy of the mechanism. Motion stability, here it is the Achilles' heel of existing crank-link mechanism can not relatively improve the running speed of pipe mill.

Utility model content

In view of the above-mentioned shortcomings of the prior art, the purpose of this utility model is to provide an inner planetary gear transmission mechanism and a pipe rolling mill with the transmission mechanism, which are used to solve the problem of short working life and poor operation of the pipe rolling mill in the prior art. Poor accuracy, instability, high noise, and difficulty in increasing the speed of operation.

In order to achieve the above object, the utility model provides an inner planetary gear transmission mechanism, the transmission mechanism includes a sliding guide groove, a frame slider, an internal gear, a planetary gear, a driving rod, a driven rod, a motor, an inner balance weight and External balance weight; the planetary gear is internally meshed with the internal gear, wherein the number of teeth of the internal gear is an even number, and the pitch circle radius of the internal gear is twice the pitch circle radius of the planetary gear; the The middle part of the driving rod is provided with a rotating shaft, and the rotating shaft is perpendicular to the center of the inner gear and is coupled with the output shaft of the motor through a spline, and one end of the driving rod is simultaneously connected with the middle part of the driven rod and the The center of the planetary gear is hinged, the other end of the drive rod is connected to the outer balance weight; one end of the driven rod is hinged to the frame slider, and the other end is connected to the inner balance weight; The frame slider can reciprocate along the sliding guide groove; the distance from the hinge point of the driven rod and the frame slider to the center of the planetary gear is equal to the pitch circle radius of the planetary gear.

In one embodiment of the present invention, the inner balance weight is provided with bolt holes, and the inner balance weight and the driven rod are connected by bolts.

In one embodiment of the present invention, the inner balance weight is a fan-shaped structure.

In one embodiment of the present invention, the inner side of the outer balance weight is arc-shaped, and fits with the outer edge of the inner balance weight.

In one embodiment of the present invention, the outer balance weight and the driving rod are connected by bolts, and the joint surfaces of the outer balance weight and the driving rod are all processed with cross key grooves.

In one embodiment of the present utility model, the sliding guide groove is arranged horizontally, and the sliding guide groove and the internal gear are arranged coaxially and symmetrically.

In one embodiment of the present utility model, the sliding guide groove is parallel to the frame slider.

In one embodiment of the present utility model, the driving rod is connected to the driven rod through a bearing, and the driving rod is connected to the planetary gear through a bearing.

In one embodiment of the present invention, the driven rod is connected with the frame slider through a bearing.

The utility model also provides a pipe rolling mill, which includes the above-mentioned internal planetary gear transmission mechanism.

As mentioned above, the inner planetary gear transmission mechanism of the present invention and the pipe rolling mill with the transmission mechanism have the following beneficial effects:

1. The inner planetary gear transmission mechanism is used as the power transmission mechanism on the high-speed cold pipe rolling mill, and its maximum operating speed can reach 320 reciprocations per minute, which is more than 2 to 3 times that of the ordinary crank-link mechanism pipe rolling mill;

2. There is no lateral component force and friction between the frame slider and the sliding guide rail, which improves the mechanical efficiency and increases the service life of the machine tool;

3. Since the inner balance weight and the outer balance weight rotate in the horizontal direction instead of the vertical operation in the crank linkage mechanism, the energy consumption of the machine tool is reduced, and the energy saving effect is obvious;

4. Improve the running speed and running stability, the noise is small, and the working environment is improved.

Description of drawings

Fig. 1 is a schematic side view of a crank linkage mechanism in the prior art.

Fig. 2 is a schematic top view of the rack slider in the present invention when it is located at the starting point of the left end.

Fig. 3 is a schematic top view of the rack slider in the utility model when it is located on the left side of the central position.

Fig. 4 is a schematic top view of the rack slider in the central position in the present invention.

Fig. 5 is a schematic top view of the rack slider in the state where the rack slider is located on the right side of the center position in the present invention.

Fig. 6 is a top view schematic diagram of the rack slider in the utility model in the state where the right end is located.

Component designation description

1’ slide rail

2’ Rack Sliders

3’ connecting rod

4' crank

5’ counterweight

1 rack slider

2 internal gears

3 planetary gears

4 inner balance weights

5 outer balance weights

6 guide groove

7 drive rod

8 follower lever

Detailed ways

The implementation of the present utility model is illustrated by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification.

See Figures 2 through 6. It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification, for those who are familiar with this technology to understand and read, and are not used to limit the implementation of the utility model Therefore, it has no technical substantive meaning. Any modification of structure, change of proportional relationship or adjustment of size shall still fall within the scope of Within the scope covered by the technical content disclosed by the utility model. At the same time, terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit this specification. The practicable range of the utility model, and the change or adjustment of its relative relationship, without any substantial change in the technical content, shall also be regarded as the practicable scope of the utility model.

Please refer to Fig. 2-Fig. 6, the utility model provides a kind of internal planetary gear transmission mechanism, described transmission mechanism comprises sliding guide groove 6, frame slider 1, internal gear 2, planetary gear 3, driving rod 7, driven Rod 8, motor (not shown), inner balance weight 4 and outer balance weight 5; the planetary gear 3 is internally meshed with the inner gear 2, wherein the number of teeth of the inner gear 2 is an even number, and the inner gear The pitch circle radius of 2 is 2 times of the pitch circle radius of described planetary gear 3; The middle part of described driving lever 7 is provided with rotating shaft, and described rotating shaft vertically passes through the circle center of described internal gear 2 and is connected with the output of described motor The shaft is connected by a spline, and one end of the driving rod 7 is hinged with the middle part of the driven rod 8 and the center of the planetary gear 3 at the same time, and the other end of the driving rod 7 is connected with the outer balance weight 5; One end of the driven rod 8 is hinged with the frame slider 1, and the other end is connected with the inner balance weight 4; the frame slider 1 can reciprocate along the sliding guide groove 6; The distance from the hinge point between the moving rod 8 and the frame slider 1 to the center of the planetary gear 3 is equal to the radius of the pitch circle of the planetary gear 3 .

For ease of description, let the center of the inner gear 2 be point A, that is, the rotating shaft in the middle of the driving rod 7 passes through point A, and set the center of circle of the planetary gear 3 as point B, that is, the distance between the driving rod 7 and the driven rod 8. The hinge point is point B, and the hinge point between the driven rod 8 and the frame slider 1 is point C.

Since the planetary gear 3 and the internal gear 2 are meshed with each other, and the internal gear 2 is fixed, only fine-tuning is performed to keep the frame slider 1 parallel to the sliding guide groove 6, so the planetary gear 3 revolves clockwise It also rotates counterclockwise. Point C drives the frame slider 1 to perform linear reciprocating motion. To make point C perform linear motion, the following conditions must be met: 1) The number of teeth of the internal gear 2 is an even number, and the number of teeth of the internal gear 2 The pitch circle radius must be twice the pitch circle radius of the planetary gear 3; 2) The revolution radius AB of the planetary gear 3 should be equal to the pitch circle radius of the planetary gear 3; 3) The point C in the frame slider 1 must be at the 3 on the pitch circle, that is, the distance AB is equal to the distance BC.

As an example, the internal balance weight 4 is a fan-shaped structure. Preferably, the inner balance weight 4 is provided with bolt holes, and the inner balance weight 4 is connected to the driven rod 8 by bolts. It is convenient to replace the inner balance weight 4 of different quality as required.

As an example, the inner side of the outer balance weight 5 is arc-shaped, and is adapted to the outer edge of the inner balance weight 4, and there is a certain gap between the outer balance weight and the inner balance weight. When the driven rod 8 overlaps with the driving rod 7, it is ensured that the outer balance weight 5 and the inner balance weight 4 pass smoothly without friction or obstruction.

As an example, the outer balance weight 5 and the driving rod 7 are connected by bolts, and the joint surfaces of the outer balance weight 5 and the driving rod 7 are all processed with cross key grooves (not shown). The cross key is used for positioning and insurance in the direction of rotation and centrifugal direction.

It should be noted that, in order to ensure that the height (thickness) of the outer balance weight 5 is consistent with that of the inner balance weight 4, the outer balance weight 5 is a boss structure, and when the driven rod 8 overlaps with the driving rod 7, The inner balance weight 4 is located at the inner side of the outer balance weight 5, and the heights of the two are about the same.

The quality of the inner balance weight 4 and the outer balance weight 5 is calculated by the quality of the rack slider 1 and the length of the driven rod 8 driving rod 7, the rack slider 1 and the driven rod 7 of different masses The lengths of the rod 8 and the driving rod 7 need to be matched by different weights of the balance weight, and the best balance weight of the balance weight is selected within the minimum optimization target of the maximum value of the residual inertial force.

As an example, the sliding guide groove 6 is arranged horizontally, and the sliding guide groove 6 is arranged coaxially and symmetrically with the internal gear 2 .

As an example, the driving rod 7 is connected to the driven rod 8 through a bearing, and the driving rod 7 is connected to the planetary gear 3 through a bearing. The driven rod 8 is connected with the frame slider 1 through a bearing. Here, the hinge point B and the hinge point C are provided with bearings, which reduces the frictional force and prolongs the working life of the transmission mechanism.

The utility model also provides a pipe rolling mill, which includes the above-mentioned internal planetary gear transmission mechanism.

Please refer to Fig. 2-Fig. 6, the working process of the inner planetary gear transmission mechanism of the present utility model is as follows:

Fig. 2 shows the status diagram of the frame slider 1 at the front starting point of the left end, at this moment, the driven rod 8 overlaps with the driving rod 7 and is parallel to the sliding guide groove 6; Fig. In 3, the motor works, and the output shaft of the motor drives the outer balance weight 5 to rotate clockwise around point A, and point B relatively drives the planetary gear 3 to also rotate clockwise; Figure 4 shows that the frame slider 1 has gone half of the total stroke ( 1/2S stroke), point C just falls on the center point of the inner gear 2, at this time, the inner balance weight 4 and the outer balance weight 5 are on the same straight line opposite to each other, and are perpendicular to the sliding guide groove 6 to completely balance it Fig. 5 is that the rack slider 1 continues to move to the right end. Taking Fig. 4 as a benchmark, the working condition of Fig. 5 is just symmetrical with Fig. 3; Fig. 6 is the end state of the rack slider 1 at the right end.

From the working state in Figure 2 to the working state in Figure 6, the outer balance weight 5 rotates 180° clockwise around point A, and the inner balance weight 4 rotates 360° counterclockwise around point B, and rotates 360°-180°=180° relative to point A , the frame slider 1 slides from the front starting point of the left end to the rear end point of the right end, this distance is the pitch circle diameter of the internal gear 2, and is also the working stroke S of the frame slider 1.

In summary, the inner planetary gear transmission mechanism of the utility model and the pipe rolling mill with the transmission mechanism have the following beneficial effects: 1) In the inner planetary gear mechanism of the utility model, the C point on the frame slider produces The linear motion of the planetary gear is a compound trajectory formed by a point on the pitch circle line of the planetary gear. It is formed by a compound motion. Therefore, unlike the original crank linkage mechanism, there is a lateral Force component and friction, so it can greatly improve the mechanical efficiency and increase the service life of the machine tool. 2) The rotation shaft of the inner planetary gear ultra-high-speed pipe rolling mill of the utility model is installed vertically, and the running track is in the horizontal direction. The inner and outer balance weights do not move vertically up and down, so the stability is good during operation, and the overall performance of the work is excellent. Reliable, under the same working conditions, not only the noise is small, the working environment is improved, but also a lot of electric energy is saved, which is in line with the concept of environmental protection and energy saving advocated by today's society. 3) The inner planetary gear transmission mechanism of the utility model is used as a power transmission mechanism on a high-speed cold pipe rolling mill, and its maximum operating speed can reach 320 reciprocations per minute, which is 2 to 3 times faster than that of an ordinary crank-connecting rod mechanism pipe rolling mill. times, reaching the international advanced level of similar products.

The above-mentioned embodiments only illustrate the principles and effects of the present utility model, but are not intended to limit the present utility model. Anyone familiar with this technology can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed in the utility model should still be covered by the claims of the utility model.

Claims (10)

1. a kind of inner planet gear transmission mechanism, it is characterised in that the transmission mechanism includes sliding guide groove, frame sliding block, internal tooth Wheel, planetary gear, drive rod, follower lever, motor, inner equilibrium block and outer balance weight；In the planetary gear and the internal gear Portion is engaged, wherein, the number of teeth of the internal gear is even number, and the pitch radius of the internal gear is the planetary pitch circle half 2 times of footpath；The middle part of the drive rod is provided with rotating shaft, the rotating shaft perpendicular to the center of circle of the internal gear and with the motor Output shaft is coupled by spline, one end of the drive rod while the middle part with the follower lever and the planetary circle The heart is hinged, and the other end of the drive rod is connected with the outer balance weight；Cut with scissors with the frame sliding block one end of the follower lever Connect, the other end is connected with the inner equilibrium block；The frame sliding block can move back and forth along the sliding guide groove；The follower lever and institute The distance for stating pin joint to the center planetary gear of frame sliding block is equal to the planetary pitch radius.

2. inner planet gear transmission mechanism according to claim 1, it is characterised in that be provided with spiral shell on the inner equilibrium block Keyhole, the inner equilibrium block and the follower lever are bolt connection.

3. inner planet gear transmission mechanism according to claim 2, it is characterised in that the inner equilibrium block is tied to be fan-shaped Structure.

4. inner planet gear transmission mechanism according to claim 3, it is characterised in that the inner side of the outer balance weight is arc Shape, and be adapted with the outer rim of the inner equilibrium block.

5. inner planet gear transmission mechanism according to claim 1, it is characterised in that the outer balance weight and the driving Bar is bolt connection, and the composition surface of the outer balance weight and the drive rod is machined with cross keyway.

6. inner planet gear transmission mechanism according to claim 1, it is characterised in that the sliding guide groove is horizontally disposed with, and The sliding guide groove is set with the internal gear coaxial-symmetrical.

7. inner planet gear transmission mechanism according to claim 6, it is characterised in that the sliding guide groove is slided with the frame Block is parallel.

8. inner planet gear transmission mechanism according to claim 1, it is characterised in that the drive rod passes through bearing and institute Follower lever connection is stated, the drive rod is connected by bearing with the planetary gear.

9. inner planet gear transmission mechanism according to claim 1, it is characterised in that the follower lever passes through bearing and institute State the connection of frame sliding block.

10. a kind of pipe mill, it is characterised in that the pipe mill includes the inner planet gear described in claim any one of 1-9 Transmission mechanism.