A kind of idle gear cushion block
Technical field
The present invention refers to install and protection train field for gear chamber idle pulley before and after the motor, refers to a kind of gear cushion block that limits the idle gear axial motion especially.
Background technique
The major function of gear cushion block is the axial motion of limiting gear, guarantees gear-driven steady, reliable.Existing idle gear cushion block is cirque structure, and the centre is plane structure for the bolt mounting holes thrust surface.
The working principle of idle gear cushion block is to be pressed on the idle gear axle by fixing bolt, and idle gear and the design of idle gear cushion block have certain axial clearance, and existing axial clearance is generally between the 0.1-0.2mm, and axial clearance is used for guaranteeing that idle gear can normal rotation.When the existence of idle gear rotation process moved axially, the idle gear cushion block can stop moving axially of idle gear, and it is steady, reliable to guarantee that idle gear rotates.
Idle gear and has friction and produces in rotation process between the idle gear cushion block, in order to prevent the wearing and tearing of idle gear and idle gear cushion block, improve slickness on surface that idle gear contacts with the idle gear cushion block by lubricant oil and rub reducing.
Idle gear cushion block in the existing technology is the plane with the contacted surface of idle gear, and such plane structure makes lubricant oil be not easy to enter between two surfaces, and lubrication effect is bad.In order to improve the lubrication effect between idle gear and the idle gear cushion block, Chinese patent application number is that the 201120430439.x patent proposes improvement project to the idle gear cushion block, and being provided with uniformly radially by two surfaces at the idle gear cushion block, fluting increases lubrication effect.But this technological scheme has obvious defects: be on the one hand, the idle gear cushion block in the course of the work, it has only a face to contact with idle gear, and what another face contacted is fixing bolt, is provided with fluting on the surface that contacts with fixing bolt without any the cost of production that acts on and increased cushion block.Another aspect is when the employing of idle gear cushion block is radially slotted, the direction of relative movement of idle gear and idle gear cushion block is to be in plumbness with fluting basically, and this state causes the lubricant oil that idle gear when motion drive can be with the collar extension sealing with fluting of the form of film, make and to enter into lubricant oil limited amount with the idle gear surface of contact, though the lubrication effect with the idle gear cushion block of not slotting makes moderate progress, and improves DeGrain.
Summary of the invention
The purpose of this invention is to provide a kind of idle gear cushion block and improve technological scheme, by improving technological scheme, raising the efficiency under the prerequisite that reduces cost, improved the lubrication effect of idle gear and idle gear cushion block surface of contact.
The present invention is achieved by the following technical solutions:
A kind of idle gear cushion block, cushion block are a ring integral body, and its face back to idle gear is the plane, and for reeded plane is set, the center line of described groove is curve or straight line with the face of idle gear contact; When the center line of groove is straight line, the center line of described groove with the angle of the radial line of the cushion block annulus heart greater than but be not equal to zero degree.
Described groove is distributed in the ring surface of cushion block.
Described groove is that both ends open is in the perforation groove of cushion block exterior edge face.
The quantity of described groove is at least two.
The cross section of described groove is the isosceles trapezoidal structure that lacks upper bottom surface.
The angle of two waist limit elongation lines of described isosceles trapezoidal structure is that 30 degree are to 90 degree.
Described groove two inclined-planes are provided with the circular arc lead angle with the plane symphyses of idle gear pad.
The beneficial effect that the present invention compares with prior art is:
1, passes through the technical program, groove has opening with the sense of rotation of idle gear certain angle to be arranged all the time, groove can not produce the oil film closed phenomenon because of the rotation of idle gear in the end face opening of idle gear cushion block like this, lubricant oil can enter into the surface that idle gear contacts with the idle gear cushion block easily, improves lubrication effect.
2, by the technical program, only fluted in a surface Machining of idle gear cushion block, reduced manufacturing procedure, reduce production costs.
Description of drawings
Fig. 1 is the structural representation of idle gear cushion block band groove surface of the present invention;
Fig. 2 is another example structure schematic representation of idle gear cushion block band groove surface of the present invention;
Fig. 3 is the cross sectional representation of idle gear cushion block groove of the present invention;
Fig. 4 uses schematic representation for the present invention.
Embodiment
Below describe technological scheme of the present invention in detail by specific embodiment, following embodiment only is exemplary, only can be used for explaining and technological scheme of the present invention being described, and can not be used for being interpreted as restriction to technical solution of the present invention.
Embodiment 1
As Fig. 2, Fig. 3 and shown in Figure 4, the working principle of idle gear cushion block is to be pressed on the idle gear axle 7 by fixing bolt, and idle gear 6 has certain axial clearance, axial clearance to be used for guaranteeing that idle gear 6 can normal rotation with 5 designs of idle gear cushion block.Idle gear cushion block 5 is a ring integral body 1, sloth wheel gear cushion block external diameter 38.5mm, and internal diameter 12mm, thickness are 2.5mm, and the specification of inertia tooth cushion block can change as required, and becoming does not influence technological scheme of the present invention.Its face back to idle gear is the plane, face with the idle gear contact is the plane that is provided with groove 4, the center line of groove 4 is curve 3, in the present embodiment, the selected material of idle gear cushion block is prior art, its material category is to not influence of technological scheme of the present invention, the center line of groove is that curve is any one, crooked groove structure is conducive to the storage to lubricant oil, the quantity of groove is at least two, be preferably three or four, and three or four grooves are distributed in uniformly on the idle gear cushion block plane.Preferably each groove is that both ends open is in the perforation groove of cushion block exterior edge face, the cross section of groove is the isosceles trapezoidal structure that lacks upper bottom surface, connect two waist limit elongation line shapes of isosceles trapezoidal structure in an angle, the number of degrees of angle are that 30 degree are to 90 degree, preferably 30 degree-60 are spent, and the plane symphyses on groove two inclined-planes with the idle gear pad is provided with the circular arc lead angle.Be provided with by lead angle and be beneficial to the frictional force that reduces between idle gear and idle gear cushion block and minimizing to contacting striking off of surface lubrication oil.
Embodiment 2
As Fig. 1, Fig. 3 and shown in Figure 4, the working principle of idle gear cushion block is to be pressed on the idle gear axle 7 by fixing bolt, and idle gear 6 has certain axial clearance, axial clearance to be used for guaranteeing that idle gear 6 can normal rotation with 5 designs of idle gear cushion block.Idle gear cushion block 5 is a ring integral body 1, and its face back to idle gear is the plane, and the face that contacts with idle gear is the plane that is provided with groove 4.In the present embodiment, the selected material of idle gear cushion block is prior art, its material category is to not influence of technological scheme of the present invention, and the center line of groove 4 is straight line 2, the center line of groove with the angle of the radial line of the cushion block annulus heart greater than but be not equal to zero degree.The quantity of groove is at least two, is preferably three or four, and three or four grooves are distributed on the idle gear cushion block plane uniformly.Preferably each groove is that both ends open is in the perforation groove of cushion block exterior edge face, the cross section of groove is the isosceles trapezoidal structure that lacks upper bottom surface, connect two waist limit elongation line shapes of isosceles trapezoidal structure in an angle, the number of degrees of angle are that 30 degree are to 90 degree, preferably 30 degree-60 are spent, and the plane symphyses on groove two inclined-planes with the idle gear pad is provided with the circular arc lead angle.Be provided with by lead angle and be beneficial to the frictional force that reduces between idle gear and idle gear cushion block and minimizing to contacting striking off of surface lubrication oil.
Although illustrated and described embodiments of the invention, for the ordinary skill in the art, be appreciated that without departing from the principles and spirit of the present invention and can carry out multiple variation, modification, replacement and modification to these embodiments that scope of the present invention is by claims and be equal to and limit.