Mecanum wheel pedestal that can passive adjustment
Technical field
The present invention relates to field of mechanical technique, particularly, relate to a kind of Mecanum wheel pedestal that can passive adjustment in support reaction direction.
Background technology
Mecanum wheels, with variety and the alerting ability of its motion, are widely used in intelligent family moving platform.But, only having in the situation that each Mecanum wheel in wheels can normally move, guarantee intelligent family moving platform is realized diversified mode of motion.In actual conditions, due to the planarization on ground, the constraints such as homogeneity of the homogeneity of friction coefficient and each Mecanum wheel carrying, tend to cause each Mecanum wheel in wheels to be subject to unbalanced load, particularly, from the friction force on ground, cannot guarantee that intelligent family moving platform can be according to predefined mode of motion and route proper motion.In addition, intelligent family moving platform is many times being undertaken the task of guaranteeing its top load bearing component attitude stabilization.So, on not too smooth road surface, under guaranteeing that whole intelligent family moving platform is according to the prerequisite of desired trajectory and predetermined way operation, should guarantee to greatest extent stationarity and the levelness of intelligent family moving platform vehicle frame.Therefore, seek each Mecanum wheel in a kind of assurance wheels and can obtain enough friction force, guarantee that as much as possible the device of intelligent family moving platform horizontal attitude just becomes important simultaneously.
Through retrieval, the suspension frame structure that patent of invention " automobile suspension arrangement " (201010537374.9) proposes can address this problem preferably, guarantees the good kiss the earth of each wheel.But, automobile hanging complicated structure, difficulty of processing is also larger.In addition, above-mentioned intelligent family moving platform is applied in the indoor environments such as laboratory, workshop more, and ground is relatively smooth, and do not need has larger side-play amount as automobile.
Summary of the invention
For defect of the prior art, the object of this invention is to provide a kind of Mecanum wheel pedestal that can passive adjustment in support reaction direction, realize when Mecanum wheel pedestal bears the outside support reaction of change, top base and bottom base can be to slide up and down the passive adjustment of mode under the constraint in pin and waist hole, and spring occurs flexible until reach balance with outside support reaction simultaneously.
For realizing above object, the invention provides a kind of Mecanum wheel pedestal that can passive adjustment in support reaction direction, comprise: top base, bottom base, spring, pin, Mecanum wheel, wheel shaft, bearing and bearing jam nut, wherein: the side of described top base arranges two waist holes of running through, the lateral location of described bottom base arranges two circular holes that run through, and described pin inserts between described waist hole and described circular hole to realize the pin joint of described top base and described bottom base; The lower surface of described top base arranges a square groove, the upper surface of described bottom base arranges a square boss, described square groove coordinates with square boss and has a gap between the two, on the relevant position of described square groove and described square boss, be respectively arranged with two circular holes that radius is equal, spring is positioned in described circular hole; Described Mecanum wheel is arranged on one end of described wheel shaft, after the inner ring of two described bearings of other end insertion of described wheel shaft, runs through described bottom base; Two back-to-back being installed in described bottom base of described bearing, tighten described bearing with jam nut to realize being connected of described wheel shaft and described bottom base.
Preferably, described waist hole and pin, and be free-running fit between the circular hole of bottom base side and pin.
Preferably, the position of the circular hole of the rigidity of described spring and square groove, square boss obtains according to the position calculation of the size of load and acting point.
Preferably, the size of the radius of the circular hole of described square groove, square boss and the degree of depth decide by the parameter of spring.
Preferably, the position of the circular hole of described waist hole and bottom base side and radius size are calculated by load, acting point position Synthesis.
Preferably, the length in described waist hole is determined by the stroke of the maximum perpendicular direction designing.
Compared with prior art, the present invention has following beneficial effect:
The present invention can realize when Mecanum wheel pedestal bears the outside support reaction of change, top base and bottom base can be to slide up and down the passive adjustment of mode under the constraint in pin and waist hole, spring occurs flexible until reach balance with outside support reaction simultaneously, to avoid Mecanum wheel to depart from ground, guarantee friction force enough between Mecanum wheel and ground.
Accompanying drawing explanation
By reading the detailed description of non-limiting example being done with reference to the following drawings, it is more obvious that other features, objects and advantages of the present invention will become:
Fig. 1 is integral structure schematic diagram of the present invention;
Fig. 2 is decomposition chart of the present invention;
Fig. 3 is upper frame of the present invention and lower pedestal structure figure.
In figure: 1 is Mecanum wheel, 2 is wheel shaft, and 3 is axle sleeve, and 4 is top base, and 5 is spring, and 6 is pin, and 7 is bottom base, and 8 is bearing jam nut, and 9 is bearing, and 10 is waist hole, and 11,12,13 is circular hole, and 14 is square groove, and 15 is square boss.
The specific embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.Following examples will contribute to those skilled in the art further to understand the present invention, but not limit in any form the present invention.It should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, can also make some distortion and improvement.These all belong to protection scope of the present invention.
As shown in Figure 1, the present embodiment provides a kind of Mecanum wheel pedestal that can passive adjustment, comprise Mecanum wheel 1, wheel shaft 2, axle sleeve 3, top base 4, spring 5, sell 6, bottom base 7, jam nut 8 and bearing 9 for bearing, wherein: Mecanum wheel 1 is arranged on one end of wheel shaft 2, after the inner ring of the other end of wheel shaft 2 through axle sleeve 3 insertion bearings 9, run through bottom base 7, bearing 9 is back-to-back to be arranged in bottom base 7, tighten bearing with jam nut 8 to realize being connected of wheel shaft 2 and bottom base 7; The lower surface of top base 4 arranges a square groove 14, the upper surface of bottom base 7 arranges a square boss 15, correspondence position in square groove 14 and square boss 15 arranges respectively two circular holes 12,13 that radius is equal, and spring 5 is positioned in circular hole 12,13; Two waist holes 10 of running through are set in the side of top base 4, at the side of bottom base 7 correspondence position, two circular holes that run through 11 are set, sell between 6 insertion waist holes 10 and circular hole 11, thereby realize the pin joint of top base 4 and bottom base 7.
In the present embodiment, described square groove 14 and described square boss 15 are with certain free-running fit.
In the present embodiment, between described waist hole 10 and described pin 6 and described circular hole 11 and described pin 6, be free-running fit.
In the present embodiment, the position of the rigidity of described spring 5 and described circular hole 12,13 obtains according to the position calculation of the size of load and acting point.
In the present embodiment, the radius size of described circular hole 12,13 and the degree of depth decide by the parameter of described spring 5.
In the present embodiment, the position of described waist hole 10 and described circular hole 11 and radius size are calculated by load, acting point position Synthesis.
In the present embodiment, the length in described waist hole 10 is determined by the stroke of the maximum perpendicular direction designing.
The present embodiment is when practice, when the power at the touchdown point place of Mecanum wheel 1 increases, power passes to spring 5 by wheel shaft 2, bearing 3, bottom base 7, causes the amount of compression of spring 5 to increase, sell 6 under the directional tagging in top base 4 holes, the middle part of the side 10, upward sliding; Otherwise when the power at the touchdown point place of Mecanum wheel 1 reduces, the amount of compression of spring 5 reduces, under the directional tagging in the pin 6 waist holes 10 at top base 4, down sliding, to avoid Mecanum wheel 1 to depart from ground, guarantees friction force enough between Mecanum wheel 1 and ground.
Above specific embodiments of the invention are described.It will be appreciated that, the present invention is not limited to above-mentioned specific implementations, and those skilled in the art can make various distortion or modification within the scope of the claims, and this does not affect flesh and blood of the present invention.