阅读说明：本技术 一种平行轴减速机 (Parallel shaft speed reducer ) 是由 郭远军 郭幸铜 郭幸钢 于 2019-04-08 设计创作，主要内容包括：本发明公开了一种平行轴减速机,其包括壳体、传动机构和限速机构。其中壳体具有容纳空间,传动机构设于壳体的容纳空间内,传动机构包括输入轴和与输入轴啮合的输出轴,输出轴具有容纳空间；其中限速机构设于输出轴的容纳空间内,用于当输出轴大于预设值时降低输出轴的转速。本平行轴减速机能够保证匀速转动,不会因为超速而造成不必要的损失,并且,通过搅拌机构的结构和非牛顿流体的材料可以设置不同的转速,能够适应不同需求的转动设备,即使在高温、高压的恶劣环境下也能够安全、稳性的运行。(The invention discloses a parallel shaft speed reducer which comprises a shell, a transmission mechanism and a speed limiting mechanism. The transmission mechanism comprises an input shaft and an output shaft meshed with the input shaft, and the output shaft is provided with an accommodating space; the speed limiting mechanism is arranged in the accommodating space of the output shaft and used for reducing the rotating speed of the output shaft when the output shaft is larger than a preset value. This parallel shaft speed reducer can guarantee the rotation at the uniform velocity, can not cause the unnecessary loss because of speeding to, structure and the fluidic material of non-Newton through rabbling mechanism can set up different rotational speeds, can adapt to the rotating equipment of different demands, even also can be safe, the operation of stability under high temperature, highly compressed adverse circumstances.)

1. A parallel shaft speed reducer, comprising:

a housing (200) having an accommodation space;

the transmission mechanism (300) is arranged in the accommodating space of the shell (200), the transmission mechanism (300) comprises an input shaft (310) and an output shaft (320) meshed with the input shaft (310), and the output shaft (320) is provided with the accommodating space;

and the speed limiting mechanism (100) is arranged in the accommodating space of the output shaft (320) and is used for reducing the rotating speed of the output shaft (320) when the output shaft (320) is larger than a preset value.

2. The parallel shaft speed reducer according to claim 1, wherein the speed limiting mechanism (100) comprises:

one end of the rotating shaft (120) is connected into the output shaft (320), the other end of the rotating shaft is connected with the shell (200), and the rotating shaft and the shell (200) are relatively fixed;

the stirring mechanism (130) is arranged on the rotating shaft (120), and the stirring mechanism (130) is provided with a first stirring blade (135);

and the non-Newtonian fluid is hermetically arranged in the accommodating space of the output shaft (320).

3. The parallel shaft speed reducer according to claim 2, wherein the speed limiting mechanism (100) further comprises:

and the adjusting mechanism (140) is arranged on the rotating shaft (120) and is used for adjusting the fluid resistance received by the first stirring blade (135) when the output shaft (320) rotates.

4. The parallel shaft speed reducer according to claim 2, wherein the speed limiting mechanism (100) further comprises:

and the friction mechanism (150) is arranged between the inner wall of the output shaft (320) and the stirring mechanism (130) and is used for enabling the friction mechanism (150) to generate friction so as to reduce the rotating speed when the rotating speed of the output shaft (320) is greater than a preset value.

5. The parallel shaft speed reducer according to claim 3, wherein the adjusting mechanism (140) penetrates one end of the output shaft (320), and the adjusting mechanism (140) has a second stirring blade that overlaps the first stirring blade (135) and is relatively movable.

6. The parallel shaft reducer of claim 5, wherein the adjustment mechanism (140) further comprises:

the adjusting plate (141) is provided with a circular ring part and the second stirring blade, the circular ring part is sleeved on the rotating shaft (120), and one end of the circular ring part is connected with the second stirring blade;

and the adjusting operation part (142) is connected with the other end of the circular ring part, is positioned outside the shell (200), and is used for driving the second stirring blade to axially move relative to the first stirring blade (135) so as to adjust the relative position of the second stirring blade and the first stirring blade (135).

7. The parallel-axis reducer according to any of claims 2-4, wherein the stirring mechanism (130) further comprises:

the sliding sleeve (131) is sleeved on the rotating shaft (120), and a sliding groove (136) is formed in the sliding sleeve (131);

the sliding block (132) is embedded in the sliding groove (136) and can axially move relative to the sliding groove (136), and the first stirring blade (135) is connected with the sliding block (132);

one end of the connecting rod (133) is hinged with the sliding block (132), the other end of the connecting rod is hinged with the rotating shaft (120), and the connecting rod (133) drives the sliding block (132) to move axially when swinging;

and one end of the elastic piece (134) is connected with the rotating shaft (120), and the other end of the elastic piece is connected with the sliding block (132) and is used for providing axial pulling force between the rotating shaft (120) and the sliding block (132).

8. The parallel shaft reducer according to claim 4, wherein the friction mechanism (150) is a friction disk, and is disposed between an inner wall of the output shaft (320) and the stirring mechanism (130).

9. The parallel shaft speed reducer according to claim 5 or 6, wherein a second adjusting hole (143) is formed in the second stirring blade, and a first adjusting hole (137) is formed in the first stirring blade (135).

10. The parallel axis reducer of claim 3, wherein the stirring mechanism (130) further comprises:

the sliding sleeve (131) is sleeved on the rotating shaft (120), and a sliding groove (136) is formed in the sliding sleeve;

the sliding block (132) is embedded in the sliding groove (136) and can move radially relative to the sliding groove (136), and the first stirring blade (135) is connected with the sliding block (132);

the cam part (138) is arranged on the rotating shaft (120) and is used for driving the sliding block (132) to move in the radial direction when the sliding sleeve (131) rotates relative to the rotating shaft (120);

and one end of the elastic piece (134) is connected with the rotating shaft (120), and the other end of the elastic piece is connected with the sliding block (132) and is used for providing a pulling force between the rotating shaft (120) and the sliding block (132).

11. The parallel shaft reducer of claim 9, wherein the adjustment mechanism (140) comprises:

the adjusting shaft (144) is arranged in the rotating shaft (120), and an adjusting groove (145) is formed in the adjusting shaft (144);

the swing rod (146) is clamped in the adjusting groove (145), the first stirring blade (135) is provided with a circular blade handle, and the blade handle penetrates through the sliding block (132) and then is connected with the swing rod (146) and is used for adjusting the angle of the first stirring blade (135) when the swing rod (146) swings;

and the adjusting operating part (142) is connected with the adjusting shaft (144) and the shell (200) and is used for driving the adjusting shaft (144) to axially move relative to the shell (200) so as to drive the swing rod (146) to swing.

Technical Field

The invention relates to a speed reducing device, in particular to a parallel shaft speed reducer.

Background

The parallel shaft speed reducer is a speed reducer in which gear shafts are parallel to each other, and is a power transmission mechanism that obtains a large torque by reducing the number of revolutions of a motor (motor) to a desired number of revolutions using a speed converter of a gear. In a mechanism for transmitting power and motion, a parallel shaft speed reducer has a quite wide application range, but the devices connected with the speed reducer are generally driven by a motor and often have rated rotating speeds, the rotating speed of the motor can be changed by factors such as frequency, voltage and the like, and when a frequency converter is in failure or damaged, the rotating speed can be out of control and a runaway accident can be caused. For example, the excessive speed of the conveyer results in the excessive conveying amount and causes blockage, and for example, the excessive speed of the elevator causes safety accidents.

Disclosure of Invention

In order to solve the technical problems, the invention aims to provide a parallel shaft speed reducer capable of stably running and preventing equipment from running in an overspeed manner.

The embodiment of the invention provides a parallel shaft speed reducer, which comprises:

a housing having an accommodating space;

the transmission mechanism is arranged in the accommodating space of the shell and comprises an input shaft and an output shaft meshed with the input shaft, and the output shaft is provided with an accommodating space;

and the speed limiting mechanism is arranged in the accommodating space of the output shaft and used for reducing the rotating speed of the output shaft when the output shaft is larger than a preset value.

Optionally, the speed limiting mechanism includes:

one end of the rotating shaft is connected into the output shaft, and the other end of the rotating shaft is connected with the shell and is relatively fixed with the shell;

the stirring mechanism is arranged on the rotating shaft and is provided with a first stirring blade;

and the non-Newtonian fluid is hermetically arranged in the accommodating space of the output shaft.

Optionally, the speed limiting mechanism further includes:

and the adjusting mechanism is arranged on the rotating shaft and used for adjusting the fluid resistance of the first stirring blade when the output shaft rotates.

Optionally, the speed limiting mechanism further includes:

and the friction mechanism is arranged between the inner wall of the output shaft and the stirring mechanism and used for reducing the rotating speed by enabling the friction mechanism to generate friction when the rotating speed of the output shaft is greater than a preset value.

Optionally, the adjusting mechanism penetrates through one end of the output shaft, and the adjusting mechanism is provided with a second stirring blade which is overlapped with the first stirring blade and can move relatively.

Optionally, the adjusting mechanism further includes:

the adjusting plate is provided with a circular ring part and the second stirring blade, the circular ring part is sleeved on the rotating shaft, and one end of the circular ring part is connected with the second stirring blade;

and the adjusting operation part is connected with the other end of the circular ring part, is positioned on the outer side of the shell and is used for driving the second stirring blade to axially move relative to the first stirring blade so as to adjust the relative position of the second stirring blade and the first stirring blade.

Optionally, the stirring mechanism further includes:

the sliding sleeve is sleeved on the rotating shaft and is provided with a sliding chute;

the sliding block is embedded in the sliding groove and can axially move relative to the sliding groove, and the first stirring blade is connected with the sliding block;

one end of the connecting rod is hinged with the sliding block, the other end of the connecting rod is hinged with the rotating shaft, and the connecting rod drives the sliding block to move axially when swinging;

and one end of the elastic piece is connected with the rotating shaft, and the other end of the elastic piece is connected with the sliding block and used for providing axial pulling force between the rotating shaft and the sliding block.

Optionally, the friction mechanism is a friction disc, and is disposed between the inner wall of the output shaft and the stirring mechanism.

Optionally, a second adjusting hole is formed in the second stirring blade, and a first adjusting hole is formed in the first stirring blade.

Optionally, the stirring mechanism further includes:

the sliding sleeve is sleeved on the rotating shaft and is provided with a sliding chute;

the sliding block is embedded in the sliding groove and can move radially relative to the sliding groove, and the first stirring blade is connected with the sliding block;

the cam part is arranged on the rotating shaft and used for driving the sliding block to move in the radial direction when the sliding sleeve rotates relative to the rotating shaft;

and one end of the elastic piece is connected with the rotating shaft, and the other end of the elastic piece is connected with the sliding block and used for providing pulling force between the rotating shaft and the sliding block.

Optionally, the adjusting mechanism includes:

the adjusting shaft is arranged in the rotating shaft, and an adjusting groove is formed in the adjusting shaft;

the swing rod is clamped in the adjusting groove, the first stirring blade is provided with a circular blade handle, and the blade handle penetrates through the sliding block and is connected with the swing rod for adjusting the angle of the first stirring blade when the swing rod swings;

and the adjusting operation part is connected with the adjusting shaft and the shell and used for driving the adjusting shaft to axially move relative to the shell so as to drive the swing rod to swing.

The input end of the parallel shaft speed reducer is connected with the motor, the output end of the parallel shaft speed reducer is connected with the rotating part of the rotating equipment, the rotating equipment synchronously rotates or proportionally rotates, the required speed and the working speed of the stirring mechanism can be selected according to the requirement of the equipment by changing the rotating sectional area of the first stirring blade, when the section of the first stirring blade is larger, the resistance for stirring the non-Newtonian fluid is larger, otherwise, the resistance is smaller, the resistance can also be changed by the material of the non-Newtonian fluid, when the non-Newtonian fluid is thinner, the resistance is smaller, and otherwise, when the non-Newtonian fluid is thicker, the resistance is larger. For example, when the rated rotation speed is set to be 100rpm, the output shaft drives the rotating device to rotate to drive the non-newtonian fluid to rotate, the first stirring blade keeps still, so that the non-newtonian fluid is stirred to generate resistance, and when the rotation speed is within 100rpm, the non-newtonian fluid is in a liquid state, so that the non-newtonian fluid is very good in fluidity and cannot generate great resistance. When the rotating speed is higher than 100rpm, the stirring speed of the non-Newtonian fluid is increased, resistance is generated, the non-Newtonian fluid becomes thick under the condition of large resistance and even becomes a solid state, so that the first stirring blade is subjected to large resistance, the rotating speed is limited, and the rotating speed is stable at 100 rpm.

The viscosity of the shear thickening fluid can be well adjusted, so that the shear thickening fluid is suitable for rotating speeds in different ranges, such as: the critical shear rate at which shear thickening of a suspension of SiO2 particles in a shear thickening fluid occurs decreases with increasing particle size and increases with increasing particle size distribution. The shear thickening strength of the SiO2 suspension decreases with increasing particle size and decreases with increasing particle size distribution. The particle size and distribution changes the shear thickening effect of the particle suspension primarily by changing the interparticle distance and the effective concentration of the particles.

Therefore, the non-Newtonian fluid is hermetically arranged in the stirring mechanism and the output shaft, so that the parallel shaft speed reducer can be ensured to rotate at a limited rotating speed, and unnecessary loss caused by exceeding the speed is avoided. The axial relative position of the rotating shaft in the output shaft is limited through the limiting mechanism, and the stability and the continuity of uniform-speed rotation can be guaranteed. And different rotating speeds can be set through the structure of the stirring mechanism and the material of the non-Newtonian fluid, so that the stirring mechanism can adapt to rotating equipment with different requirements, and can safely and stably operate even in a high-temperature and high-pressure severe environment.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 to 3 are perspective views showing respective orientations of a first embodiment of the present invention, in which fig. 1 is an overall external view, fig. 2 is a view with a part of a housing cut away to show the structure of an internal transmission mechanism, and fig. 3 is a view taken along an output shaft to show the internal structure;

FIG. 4 illustrates a cross-sectional view of the speed limiting mechanism in isolation to more clearly show the internal mechanisms of the speed limiting mechanism;

FIG. 5 is an enlarged view of part B of FIG. 4;

FIG. 6 independently illustrates an internal perspective view of the speed limiting mechanism with a portion of the output shaft removed, highlighting the internal stirring mechanism and adjustment mechanism portions;

FIG. 7 is an exploded view of the speed limiting mechanism with parts removed;

FIGS. 8 and 9 show the speed limiting mechanism with a portion of the output shaft removed, with the internal stirring mechanism and adjustment mechanism portions highlighted;

FIG. 10 is a schematic cross-sectional view of another speed limiting mechanism of the present invention;

FIG. 11 is the perspective view of FIG. 10 with the output shaft removed, highlighting the internal stirring mechanism portion;

FIG. 12 is an exploded view of FIG. 11;

FIG. 13 is the perspective view of FIG. 10 with the output shaft and friction disk removed, with portions of the adjustment mechanism inside highlighted;

fig. 14 is a right side view of fig. 10 with the output shaft removed, highlighting the agitation mechanism portion.

Detailed Description

The following detailed description of the present invention is given for the purpose of better understanding technical solutions of the present invention by those skilled in the art, and the present description is only exemplary and explanatory and should not be construed as limiting the scope of the present invention in any way.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

It is to be understood that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like are used in a generic and descriptive sense only and not for purposes of limitation, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like are used in the generic and descriptive sense only and not for purposes of limitation, as the term is used in the generic and descriptive sense, and not for purposes of limitation, unless otherwise specified or implied, and the specific reference to a device or element is intended to be a reference to a particular element, structure, or component. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.