CN107939936A - Four roller frictional double epicyclic gear drive devices - Google Patents

Abstract

The present invention relates to a kind of four roller frictional double epicyclic gear drive devices, more particularly to a kind of four roller frictional double epicyclic gear drive devices suitable for the transmission of miniature electric hydraulic tongs, belong to technical field of mechanical transmission.The four roller frictionals double epicyclic gear drive device includes a motor, a pair of planetary wheel mechanism, a planetary gear sleeve, a base, an end cap, a cam, two rotation cage sets and two guiding axis；Double-planet gear mechanism is equipped with planet wheel sleeve, cam is between double-planet gear mechanism, and double-planet gear mechanism and cam be between base and end cap, guiding axis respectively with the cooperation of base, cam and end cover clearance.The present invention is better than the transmission device of other miniature electric hydraulic tongses, its is reasonable in design, ingenious, convenient installation and dismounting, while it uses the kind of drive of double rollers friction, make it have it is small, the features such as light-weight and transmission efficiency.

Description

Four-roller friction double planetary transmission

technical field

The invention relates to a four-roller friction double planetary transmission device, in particular to a four-roller friction double planetary transmission device suitable for transmission of miniature electrohydraulic pliers.

Background technique

Planetary transmission, due to its small size and high transmission efficiency, occupies a large share in the transmission market of micro-electrohydraulic tongs; but a large part of the planetary transmission has a complex structure, which is not easy to manufacture and install, and is not easy to disassemble. , and with the increase of use time, problems such as noise and vibration will appear; it does not meet the requirements of modern industry for mechanical transmission devices.

It can be seen that the design of the micro-electric hydraulic pliers transmission device has obvious defects in structure and use compared with the existing micro-electric hydraulic pliers transmission device. The designer actively researched and innovated on this, and finally created a micro-electric hydraulic pliers. The transmission device of hydraulic pliers - four-roller friction double planetary transmission device; under the premise of ensuring the efficiency of transmission and reasonable structural design, this device realizes simple structure, convenient installation and disassembly, low noise, small vibration and output force Great features.

Contents of the invention

The purpose of the present invention is to overcome the above-mentioned problems existing in the prior art, and provide a four-roller friction double planetary transmission device with reasonable and simple structural design, convenient disassembly and installation, low noise, small vibration and large output force. This transmission is mainly suitable for miniature electrohydraulic pliers.

The technical scheme adopted by the present invention to solve the above-mentioned technical problems is: the four-roller friction double planetary transmission device includes a motor and a planetary gear sleeve, and a double planetary gear train is arranged in the planetary gear sleeve, and the feature is: it also includes A base, an end cover, a cam and two guide shafts, the cam is located between the double planetary gear train, and the double planetary gear train and the cam are located between the base and the end cover, and the guide shaft cooperates with the base, the cam and the end cover respectively.

As a preference, the four-roller friction double planetary transmission device includes a motor, a double planetary gear train mechanism, a planetary gear sleeve, a base, an end cover, a cam, two rotating cages and two guide shafts; The sleeve is provided with a double planetary gear train mechanism, and the cam is located between the double planetary gear train mechanisms, while the double planetary gear train mechanism and the cam are located between the base and the end cover, and the guide shafts are in clearance fit with the base, the cam and the end cover respectively.

Preferably, the motor is provided with two threaded holes and a motor shaft.

As a preference, the planetary gear sleeve is provided with two threaded holes 2, two grooves and a thread, the threaded hole 2 is coaxial with the threaded hole, and the two grooves are arranged symmetrically in the direction of 180°.

As a preference, the double planetary gear train is composed of a rotating wheel, a motor shaft and a double rotating wheel cage, and the rotating wheel, the motor shaft and the double rotating wheel cage are installed in the planetary wheel sleeve along the Y axis; the rotating The wheel is four cylindrical structures with the same size, which has a cylindrical surface and two rounded corners. The rotating wheel is located in the double rotating wheel cage and between the motor shaft. Through rough surface contact, it interacts in the circumferential direction. The cross-section of the interaction area is circular; the double rotating wheel cage is composed of a lower rotating wheel cage and an upper rotating wheel cage, and a plate is arranged on the lower rotating wheel cage, and the upper rotating wheel cage A plate two is arranged on the top, and the support plate one and the support plate two ensure that the lower rotating wheel cage and the upper rotating wheel cage have the same angular velocity.

As a preference, the base is provided with a hole 1, an inclined surface 1 and two guide grooves 1; the guide groove 1 and the groove (4-A) are semicircular arc grooves with equal radius, and the guide groove 1 is in a direction of 180° set up symmetrically.

As a preference, the end cover is provided with two holes two, one hole three, one inclined plane two and two guide grooves two; the guide groove two and the groove are semicircular arc grooves with equal radii, and the two guide grooves are at 180 It is arranged symmetrically in the direction of °.

As a preference, the cam is a symmetrical double conical shape, and the cam is provided with a boss, a shaft section 1, two shaft sections 2, two sinusoidal surface profiles and two grooves, and the shaft section 1 is opposite to the shaft section 2. The extended surface has a slope of 2°~3°, the groove and the groove are semicircular arc grooves with equal radius, and the two grooves are arranged symmetrically in the direction of 180°.

As a preference, the grooves respectively form a round hole with the first guide groove, the second guide groove and the groove, and the guide shaft and the first guide groove, the second guide groove and the groove are assembled in a gap to realize the reciprocating movement of the end cover along the Y axis At the same time, the constraint restricts the circumferential rotational movement of the base, end cap and cam.

The beneficial effects of the present invention are: compared with the prior art, this four-roller friction double planetary transmission adopts a double friction transmission mode, although the overall design reduces a lot of structures compared with other planetary transmissions, but There is no reduction in transmission performance; generally speaking, this invention is superior to other transmission devices of micro-electric hydraulic pliers. Its structural design is reasonable, ingenious, and convenient for disassembly and installation. Lightweight, high transmission efficiency and other characteristics.

Description of drawings

Figure 1 is a partial cross-sectional view of a two-dimensional view of the present invention.

Fig. 2 is a full sectional view along A-A of Fig. 1 .

Fig. 3 is a full sectional view along B-B of Fig. 1 .

Fig. 4 is a full sectional view along C-C of Fig. 1 .

Fig. 5 is a full sectional view along D-D of Fig. 1 .

Figure 6 is a two-dimensional view of the planetary sleeve part and a full sectional view along E-E.

Figure 7 is a perspective view of the rotating wheel part.

Figure 8 is a two-dimensional view of the cam part and a full cross-sectional view along F-F.

Figure 9 is a two-dimensional view of the base part and the end cap part and their full section along G-G.

Fig. 10 is a perspective view of an applicable situation.

Fig. 11 is a three-dimensional exploded view after the plunger clamping device and the pincer head device are removed.

In the figure: 1 motor; 1-A threaded hole 1; 2 motor shaft, 3, screw; 4 planetary gear sleeve, 4-A slot; 4-B threaded hole 2; 5 base; 5-A guide slot 1; 5 -B hole one; 5-C inclined plane one; 6 lower rotating wheel cage; 6-A support plate one; 7 rotating wheel; 7-A cylindrical surface; 7-B fillet; 8 cam; ;8-B boss; 8-C groove; 8-E shaft section two; 8-F shaft section one; 9 guide shaft; 10 upper rotating wheel cage; 10-A support plate two; 11 end cover; 11 -A hole two; 11-B hole three; 11-C guide groove two; 11-D inclined plane two; 101 plunger clamping device; 102 clamp head device; 122 thread.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Embodiment: Refer to Fig. 1 to Fig. 11, including a motor 1, a planetary gear sleeve 4, a double planetary gear train, a base 5, an end cover 11, a cam 8 and two guide shafts 9, the cam 8 is located on the double planetary Between the gear trains, the double planetary gear train and the cam 8 are located between the base 5 and the end cover 11, and the two guide shafts 9 are clearance fit with the base 5, the cam 8 and the end cover 11 respectively.

This embodiment generally includes a motor 1 and a planetary gear sleeve 4, the motor 1 and the planetary gear sleeve 4 are connected together by screws 3; there are four rotating wheels 7, and the rotating wheels 7 and the motor shaft 2 form two planets Gear trains, wherein one of the planetary gear trains is located in the lower rotating wheel cage 6, and the other planetary gear train is located in the upper rotating wheel cage 10, there is a cam 8 between the two gear trains, and the two planetary gear trains, the cam 8 and the The double-rotating wheel cage is located between the base 5 and the end cover 11, and the base 5, the end cover 11, the double-rotating wheel cage and the cam 8 are installed in the planetary wheel sleeve 4 along the Y axis, and the guide shaft 9 and the guide The circular holes formed by groove 1 5-A, guide groove 2 11-C and groove 8-C are clearance fit, so that the circumferential direction of the end cover 11 is constrained and the rotation of the end cover 11 is locked.

The lower rotating wheel cage 6 and the upper rotating wheel cage 10 can not only ensure that the rotation axis of the rotating wheel 7 is parallel to the Y axis, but also ensure that the two planetary gear trains form 180° on the matching sinusoidal surface profile 8-A distribution; the first support plate 6-A and the second support plate 10-A can ensure that the lower rotating wheel cage 6 and the upper rotating wheel cage 10 have the same angular velocity.

The rotary wheel 7 is provided with a cylindrical surface 7-A; the extension direction of the cylindrical surface 7-A is parallel to the longitudinal axis Y axis; the rotary wheel 7 and the motor shaft 2 transmit power through surface friction; and the rotary wheel 7 and the motor shaft 2 Generate friction in the circumferential direction, which is the transmission force required by the four-roller friction double planetary transmission.

Referring to Fig. 1, in the planetary gear sleeve 4, the surface extension of the slope one 5-C, the sinusoidal surface profile 8-A and the slope two 11-D is inclined at an acute angle toward the Y axis; the acute angle slope can effectively ensure that the rotating wheel 7 interacts with the motor shaft 2 in the radial direction, and can ensure that the rotating wheel 7 is in high contact with the inclined plane 5-C, the sinusoidal surface profile 8-A, and the inclined plane 11-D, thereby reducing friction loss and improving transmission Efficiency; through data literature and structure optimization, when this acute angle inclination is 45 °, the wear is minimum and the structure is optimal, because the 45 ° acute angle contributes to the four rotating wheels 7 and the inclined plane 5-C, the sinusoidal surface profile 8-A and Rotational fit between ramps two 11-D.

Referring to Fig. 8, the cam 8 is a symmetrical double conical shape; the boss 8 is provided with a boss 8-B, a shaft section 1 8-F, two shaft sections 2 8-E, and two sinusoidal surface profiles 8-A And two grooves 8-C, two grooves 8-C are arranged symmetrically; Shaft section 1 8-F has a slight slope of 2°~3° relative to the extension surface of shaft section 2 8-E, and this slope helps In order to avoid the large-scale contact between the outer surface of the cam 8 and the planetary sleeve 4, and further improve the transmission efficiency of the present invention.

Two holes 11-A and one hole three 11-B on the end cover 11, hole two 11-A and hole three 11-B are concentric, and the cam 8 is also provided with hole two 7-D. During the process, the accumulation of unfavorable pressure in the device can be weakened.

The principle analysis of this embodiment:

Referring to Fig. 2, Fig. 3, Fig. 4 and Fig. 5, the present embodiment drives motor 1 to work by lithium battery, and motor 1 drives the motor shaft 2 with rough surface to rotate; 8-A and the slope 2 11-D squeeze against the motor shaft 2, thus forming the interaction between the rotating wheel 7 and the motor shaft 2 in the circumferential direction, and because the four rotating wheels 7 are all provided with cylindrical surfaces 7 -A, so a transmission force must be generated between the rotary wheel 7 and the motor shaft 2; it is precisely this transmission force that drives the rounded corners 7-B of the four rotary wheels 7 on the inclined plane 5-C and the sinusoidal surface profile 8- When A and inclined plane 11-D are in contact, they all rotate along a circular orbit; the rotating wheel 7 is distributed at 180° equiangular angles under the effect of the double rotating wheel cage, and its maximum stroke is 180°; when the rotating wheel 7 rotates When the position reaches 180°, the cam 8 reciprocates once, and the reciprocating motion of the cam 8 drives the plunger clamping device 101 to operate, thereby realizing the work of the miniature electrohydraulic pliers clamp head device 102 .

Analysis and calculation of this embodiment:

The speed n of the motor 1 is 250r/min, and the power is 0.08kw; calculated by the torque formula M=9549P/n, the torque M of the motor 1 is 3.1Nm; it is known that r is the radius of the motor shaft 2 is 1.15mm, and the motor The friction factor u between the shaft 2 and the four rotating wheels 7 is 0.023, the effective contact area S between the oil rod and the end cover 11 is 28mm ² , and the driving force on the motor shaft 2 is set to F ₁ , according to the formula F= F1× (1-u) and the formula P=f/s can be obtained. The output force F and rated pressure P that this product can generate are 2596N and 92.7MPa respectively, which are 32.7MPa larger than the maximum pressure of 60MPa in the application number 201620069528.

The specific embodiments described herein are only specific implementations of the present invention, and those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or replace them in similar ways, as long as they do not Any deviation from the structure of the present invention or beyond the scope defined by the claims shall belong to the protection scope of the present invention.

Claims (8)

1. four roller frictional double epicyclic gear drive devices include a motor（1）, a pair of planetary wheel mechanism, a planetary gear sleeve（4）、 One base（5）, an end cap（11）, a cam（8）, two rotation cages set and two guiding axis（9）；Planet wheel sleeve（4）It is interior be equipped with it is double Planetary wheel mechanism, cam（8）Between double-planet gear mechanism, and double-planet gear mechanism and cam（8）Positioned at base （5）With end cap（11）Between, guiding axis（9）Respectively with base（5）, cam（8）And end cap（11）Clearance fit.

2. four roller frictionals double epicyclic gear drive device according to claim 1 is characterized in that：The motor（1）On set There are two threaded holes one（1-A）An and motor shaft（2）.

3. four roller frictionals double epicyclic gear drive device according to claim 1 is characterized in that：The planet wheel sleeve （4）Equipped with two threaded holes two（4-B）, two grooves（4-A）An and screw thread（122）, threaded hole two（4-B）With threaded hole one（1- A）It is concentric, two grooves（4-A）It is symmetrical in 180 ° on Y-axis.

4. four roller frictionals double epicyclic gear drive device according to claim 1 is characterized in that：The double-planet train By rotating wheel（7）, motor shaft（2）And bispin runner cage set composition, rotating wheel（7）, motor shaft（2）And bispin runner cage set is along Y Axis is installed on planet wheel sleeve（4）It is interior；The rotating wheel（7）For the identical cylindrical structure of four sizes, it is equipped with a circle Cylinder（7-A）With two fillets（7-B）, rotating wheel（7）Interior and motor shaft is covered positioned at bispin runner cage（2）Between, pass through coarse table Face contacts, and it is circumferentially being formed interaction, the cross section of its interaction zone is circle；The bispin runner cage set By lower rotating wheel cage set（6）With upper rotating wheel cage set（10）Composition, lower rotating wheel cage set（6）It is equipped with a support plate one（6-A）, on Rotating wheel cage set（10）It is equipped with a support plate two（10-A）, support plate one（6-A）With support plate two（10-A）Ensure lower rotating wheel cage set （6）With upper rotating wheel cage set（10）With same angular velocity.

5. four roller frictionals double epicyclic gear drive device according to claim 1 is characterized in that：The base（5）On set There is a hole one（5-B）, an inclined-plane one（5-C）And two guide groove one（5-A）；Guide groove one（5-A）With groove（4-A）For with identical The semi-circular arc groove of radius, and two guide grooves one（5-A）It is symmetrical in 180 ° on Y-axis.

6. four roller frictionals double epicyclic gear drive device according to claim 1 is characterized in that：The end cap（11）On Equipped with holes two（11-A）, a hole three（11-B）, an inclined-plane two（11-D）And two guide groove two（11-C）；Guide groove two（11-C） With groove（4-A）For the semi-circular arc groove with same radius, and two guide grooves two（11-C）In symmetrical on 180 ° of Y-axis.

7. four roller frictionals double epicyclic gear drive device according to claim 1 is characterized in that：The cam（8）For one In lead to symmetrical bi-conical, cam（8）It is equipped with a boss（8-B）, a shaft part one（8-F）, two shaft parts two（8-E）, it is two sinusoidal Curved surface profile（8-A）And two groove（8-C）, shaft part one（8-F）Relative to shaft part two（8-E）Elongated surfaces it is oblique with 2 ° ~ 3 ° Degree, groove（8-C）With groove（4-A）For the semi-circular arc groove with equal radii, and two grooves（8-C）It is right in 180 ° on Y-axis Claim distribution.

8. the four roller frictional double epicyclic gear drive devices according to claim 1 or 3 or 5 or 6 is characterized in that：The groove （4-A）Respectively with guide groove one（5-A）, guide groove two（11-C）And groove（8-C）Form a circular hole, guiding axis（9）With guiding Groove one（5-A）, guide groove two（11-C）And groove（8-C）The circular hole formed is clearance fit relationship, realizes end cap（11）Along Y While axis reciprocatingly moves, constraint limitation base（5）, end cap（11）And cam（8）The movement that rotates in a circumferential direction.