CN103671603A - Clearance type coupler, steel ball clutch and vehicle reverse slipping prevention machine - Google Patents

Abstract

Based on the utility model with the patent number being 201120129374.5 and the invention with the patient application number being 201110107488.4, the invention provides a novel clearance type coupler and a novel steel ball clutch transmission mechanism. The technical scheme of a vehicle reverse slipping prevention machine is improved. A coupling control mechanism is formed by the clearance type coupler and a steel ball clutch, a machine case, a one-way brake system and the like are included, and a vehicle reverse slipping prevention machine which is universally suitable for installation of a vehicle transmission system is formed.

Description

Clearance type coupling, steel ball clutch and the anti-slip back device of vehicle

Technical field

The present invention relates to mechanical engineering current techique field and AE field, belong to a kind of driving mechanism parts in machine driven system, be specifically related to a kind of clearance type coupling, a kind of steel ball clutch and with the anti-slip back device of a kind of vehicle of above-mentioned clearance type coupling and steel ball clutch.

Background technique

Automobile is in up-hill journey process, tend to run into the operating mode that need to stop on ramp, effect due to gravity, automobile is subject to one to the active force of slippage under slope, and starting upward slope is more a lot of than starting difficulty on level road again in this case, driver's operating technology is had to higher requirement.The starting of generally going up a slope need to be controlled break, engage a gear, control accelerator pedal, solenoidoperated cluthes pedal, and this series of operation must be accomplished that order is correct, dynamics is moderate, accurately puts in place, accomplish without any letup.Careless slightly, operation failure, mainly causes two kinds of results, and the one, engine misses in starting-up process, the 2nd, cause in car load starting-up process and slip.And while running into the bad working environments such as heavy duty, large slope, in car load starting-up process, slip and often lead to major traffic accidents.

For solving the slip problem of automobile in up-hill journey starting-up process, the patent No. is the application for a patent for invention that 201120129374.5 utility model patent and number of patent application are 201110107488.4, a kind of novel bi-directional drive mechanism at intermittence has been proposed, and with the automobile up slope anti-slip back device of starting to walk of bi-directional drive mechanism at this at intermittence.The technological scheme that the intermittence that this patent application proposes, bi-directional drive mechanism adopted is: described intermittence bi-directional drive mechanism, by input shaft, output shaft, bi-directional drive pawl, driving wheel, driven wheel, casing etc., formed.Driving wheel and input shaft are fixedly connected, and driven wheel and output shaft are fixedly connected; Bi-directional drive pawl is arranged on driving wheel, can orientation axis be installed around it and swing, and driven wheel and driving wheel are coaxially installed, and driven wheel is provided with and the equal engageable teeth groove of positive and negative two sense of rotation of bi-directional drive pawl.Driving wheel is during towards a direction rotation, drive bi-directional drive pawl to circle towards a direction, bi-directional drive pawl also swings around orientation axis is installed, and bi-directional drive pawl progressively enters the teeth groove of driven wheel, bi-directional drive pawl is meshed with the teeth groove of driven wheel, drives driven wheel towards a direction rotation.Driving wheel is during towards contrary another direction rotation, drive bi-directional drive pawl to circle towards another contrary direction, bi-directional drive pawl also swings around orientation axis is installed, bi-directional drive pawl progressively depart from driven wheel teeth groove original engagement, progressively enter the teeth groove of another sense of rotation of driven wheel, bi-directional drive pawl is meshed with the teeth groove of another direction rotation of driven wheel, drives driven wheel towards another contrary direction rotation.

The vehicle anti-running device that this patent application provides, utilize the dwell time at intermittence of bi-directional drive mechanism at above-mentioned intermittence, bi-directional drive pawl is before another contrary direction and driven wheel engagement, its inclined working contacts with knock-out pin, by knock-out pin, promote brake disc and move, the set castellated attachment tooth attachment tooth set with driven wheel of brake disc combined.Because brake disc and braking roller have formed a uni-directional brake, so after driven wheel connects with brake disc, driven wheel and the output shaft connecting have had reverse rotating brake function, so can realize the design object of vehicle anti-running.

The anti-slip back automobile that this patent application provides, by above-mentioned vehicle anti-running device, be arranged between automobile gearbox transmission shaft and automobile drive axle transmission shaft, realized a kind of Selective Control, automobile advance upward slope, the descending that advances, the upward slope that falls back, fall back in four kinds of ramp driving states of descending, select automobile to advance while going up a slope, the driving mechanism of automobile is automatically subject to braking action in the sense of rotation falling back, and has solved the anti-slip back problem of starting of going up a slope.Automobile advances in descending process and stops, and while again starting to walk, Action of Gravity Field direction is consistent with motor racing direction, does not therefore exist vehicle backing to slip problem.At car reversed upward slope, the two kinds of ramp driving states of descending that fall back, the break of the one direction effect that automobile drive axle transmission shaft is built-in with vehicle anti-running device is not connected, and the upward slope that therefore falls back, the descending that falls back starting and general-utility car are as broad as long.

In the Related product trial-production of above-mentioned patent application and process of the test, although it is no problem to recognize that intermittently bi-directional drive mechanism function realizes aspect, aspect simplified structure and reduction manufacturing process cost, also there is larger room for improvement; In process of the test, also recognize the impact due to machining accuracy, when the set castellated attachment tooth attachment tooth set with driven wheel of this product brake disc combines, have some catching phenomena.Therefore need to improve design to product.

Summary of the invention

First object of the present invention is to provide a kind of clearance type coupling, cam ring is meshed to transmit the motion of positive and negative two sense of rotation with external cam, cam ring and external cam arrange very large matching gap each other, in restart procedure after rotation direction conversion, because large matching gap causes the larger stroke that rotates freely, make passive rotary component have an of short duration dwell time at intermittence, can realize bi-directional drive mechanism intermittently identical function and structure simpler.

Second object of the present invention is to provide a kind of steel ball clutch, on driving wheel and driven wheel, all circumferentially process one group of semicircle teeth groove, in groove, place steel ball, the transmitting rotary power by compressing steel ball, when impacting force is eliminated, rely on spring return function and stop the transmission of rotating power, can improve the catching phenomenon of castellated connection teeth.

The 3rd object of the present invention is to provide the anti-slip back device of a kind of vehicle, adopt clearance type coupling and steel ball clutch to form and connect control mechanism, also comprise casing, one-way brake mechanism etc., form a kind of anti-slip back device of vehicle that vehicle drive system is installed that is generally applicable to.

Clearance type coupling of the present invention, comprises cam ring, external cam, it is characterized in that:

Described cam ring and described external cam are coaxially installed;

Described cam ring at least arranges the motion that convex gear teeth match to transmit positive and negative two sense of rotation with the evagination gear teeth of described external cam, and described external cam at least arranges the motion that described evagination gear teeth match to transmit positive and negative two sense of rotation with the described convex gear teeth of described cam ring;

The described evagination gear teeth of the described convex gear teeth of described cam ring and described external cam are provided with the matching gap along the circumferential direction going up, described matching gap can guarantee the described cam ring as active rotation parts, or the described external cam as active rotation parts, after changing sense of rotation in initial start-up course, there is angle of swing for being greater than 5 °, and be less than the stroke that rotates freely of 355 °.

In above-mentioned clearance type coupling technological scheme, for fear of active rotation parts, after changing sense of rotation, in initial start-up course, because rotating freely stroke, produce impact, it is characterized in that:

One end in described external cam is also provided with seal stopper ring, and the interior annulus of the outer toroid of described seal stopper ring and described cam ring has airtight gap A radially;

The described evagination gear teeth root circle of the described convex gear teeth top circle of described cam ring and described external cam has airtight gap B radially;

The described evagination gear teeth top circle of the described convex gear teeth root circle of described cam ring and described external cam has airtight clearance C radially;

The dynamic airtight damping characteristic of described airtight gap A, described airtight gap B, described airtight clearance C forms airtight damping cavity A and airtight damping cavity B when described cam ring and described external cam relative movement.

In above-mentioned clearance type coupling technological scheme, for fear of in normal operation process, passive rotary component surmounts active rotation component speed, it is characterized in that:

At evagination gear teeth tooth top position described at least one of described external cam, be radially provided with radially locking bolt hole, in described radially locking bolt hole, be provided with centrifugal locking bolt;

Corresponding two of the arranging knock hole radially radially at convex gear teeth tooth root position described at least one of described cam ring is provided with ejector pin and ejector pin spring in described radially knock hole;

When described cam ring and described external cam are when transmitting the working state of left-handed rotation campaign, the described radially locking bolt hole that described external cam arranges, knock hole centering in coaxial state radially described in of setting corresponding to described cam ring;

When working state in transmitting dextrad and rotatablely moving of described cam ring and described external cam, the described radially locking bolt hole that described external cam arranges, knock hole centering in coaxial state radially described in another of setting corresponding to described cam ring.

In above-mentioned clearance type coupling technological scheme, in order to make the described cam ring as active rotation parts, or as the described external cam of active rotation parts, initial after changing sense of rotation have the execution active force to other component in rotating freely stroke, it is characterized in that:

The described evagination gear teeth of described external cam are provided with pushing tow inclined-plane;

On the end face web of described cam ring, be provided with pushing tow pin-and-hole;

In described pushing tow pin-and-hole, be provided with knock-out pin, one end of described knock-out pin is associated with described pushing tow inclined-plane.

Steel ball clutch of the present invention, comprises left half-clutch, right semi-clutch, it is characterized in that:

Described left half-clutch is circumferentially provided with one group of left steel bead groove, and described right semi-clutch is circumferentially provided with one group of right steel bead groove;

In described left steel bead groove, be provided with left steel ball group, in described right steel bead groove, be provided with right steel ball group.

In above-mentioned steel ball Clutch Technology scheme, in order to realize the separation of controlling and the combination of steel ball clutch, and can normal delivery move, also comprise return spring, pushing tow ring, it is characterized in that:

On described left half-clutch, be provided with castellated connection teeth, described right semi-clutch is provided with inner spline groove.

The anti-slip back device of vehicle of the present invention, comprise input shaft, output shaft, left casing, right casing, brake hoop, braking star-wheel, braking roller, it is characterized in that: also comprise described clearance type coupling, described steel ball clutch, the set described knock-out pin described left half-clutch set with described steel ball clutch of described clearance type coupling is associated, and the axial motion of described knock-out pin promotes described left half-clutch and produces axial motion.

In the anti-slip back device technological scheme of above-mentioned vehicle, for guaranteeing that described steel ball clutch can normal separation the bearing load in the situation that, it is characterized in that: described braking star-wheel is provided with castellated connection teeth groove, the described castellated connection teeth groove described castellated connection teeth set with described left half-clutch is meshed to transmit motion, described castellated connection teeth is with described castellated to be connected the working surface that teeth groove bears brake load be inclined-plane, and the angle of this inclined working and described left half-clutch movement direction is more than or equal to the friction angle of working surface.

Essence of an invention feature and remarkable result:

A kind of clearance type coupling provided by the present invention is a kind of mechanical transmission spare part in common use, pass through cam ring, external cam transmission just, the rotating power of anti-both direction, due to cam ring, the convex gear teeth that external cam cooperatively interacts and the evagination gear teeth are designed with a very large matching gap in a circumferential direction, therefore, no matter be that cam ring is as active rotation parts, or external cam is as active rotation parts, after changing sense of rotation in initial start-up course, driving wheel has changed rotation direction, and driven wheel is not followed driving wheel rotation immediately, driven wheel at this constantly in standstill state at intermittence, in this dwell time at intermittence, can be used for other the action of component.Clearance type coupling is mainly that the usability of the anti-slip back device of vehicle is improved.

A kind of steel ball clutch provided by the present invention is a kind of mechanical transmission spare part in common use, by be arranged at left half-clutch left steel ball group, be arranged at the right steel ball group transmitting rotary power of right semi-clutch, the effect with return spring that moves to axial of left half-clutch and right semi-clutch is controlled in operation, realizes the separated and combination of driving wheel and driven wheel motion transmission.Steel ball clutch is mainly that the usability of the anti-slip back device of vehicle is improved.

The anti-slip back device of a kind of vehicle provided by the present invention is a kind of transmission system that is generally applicable to vehicle, by the pushing tow inclined-plane of the clearance type coupling evagination gear teeth, automatically controls knock-out pin, realizes separation and combination that the motion of steel ball clutch is transmitted; By separation and the combination of steel ball clutch, the uni-directional brake that realization consists of braking roller, braking star-wheel, brake hoop and the separated and combination of driving wheel of vehicle, thus realize the design object while selecting vehicle to advance upward slope with anti-slip back function.

Remarkable result of the present invention is, designed a kind of simple in structure, reliable operation, had the intermittently coupling of bi-directional drive function, designed a kind of separation with in conjunction with steadily, steel ball clutch reliably; The improvement of above-mentioned two kinds of mechanical parts and application, reached the object of the anti-slip back device service behaviour of lifting vehicle.

Accompanying drawing explanation

Fig. 1 is clearance type coupling outline drawing of the present invention;

Fig. 2 is clearance type coupler structure isometric cutaway view of the present invention;

Fig. 3 is the main sectional view of clearance type coupler structure of the present invention;

Fig. 4 is external cam structure isometric cutaway view of the present invention;

Fig. 5 is cam ring structure isometric cutaway view of the present invention;

Fig. 6 is the explanation of A-A working state shown in Fig. 3 sectional view;

Fig. 7 is the explanation of A-A working state shown in Fig. 3 sectional view;

Fig. 8 is the explanation of A-A working state shown in Fig. 3 sectional view;

Fig. 9 is the explanation of A-A working state shown in Fig. 3 sectional view;

Figure 10 is the explanation of A-A working state shown in Fig. 3 sectional view;

Figure 11 is steel ball clutch configuration isometric cutaway view of the present invention;

Figure 12 is left half-clutch profile axonometric drawing of the present invention;

Figure 13 is right semi-clutch profile axonometric drawing of the present invention;

Figure 14 is steel ball clutch separation working state schematic representation of the present invention;

Figure 15 is that steel ball clutch of the present invention is in conjunction with working state schematic representation;

Figure 16 is Figure 15 B-B sectional view;

Figure 17 is the main sectional view of the anti-slip back device of vehicle of the present invention;

Figure 18 is Figure 17 C-C sectional view;

Figure 19 is steel ball clutch of the present invention and braking star-wheel coupled condition schematic diagram.

The explanation of accompanying drawing mark:

1-cam ring 2-knock-out pin 3-external cam

The centrifugal locking bolt 5-of 4-ejector pin 6-seal stopper ring

A 8-ejector pin spring 9-pushing tow inclined-plane, the airtight gap of 7-

10-evagination gear teeth 11-is locking bolt hole 12-pushing tow pin-and-hole radially

13-convex gear teeth 14-is the airtight damping cavity A of knock hole 15-radially

The airtight clearance C of the airtight damping cavity B 18-of the airtight gap of 16-B 17-

The castellated connection teeth of the left steel bead groove 21-of 19-left half-clutch 20-

The right steel ball group of the left steel ball group of 22-23-24-right semi-clutch

The right steel bead groove 26-of 25-return spring 27-pushing tow ring

The left casing 30-of 28-input shaft 29-brake hoop

31-braking roller 32-braking star-wheel 33-output shaft

The castellated connection teeth groove of the right casing 35-of 34-

Embodiment

The clearance type coupling that the present invention proposes, main driving component is cam ring 1 and external cam 3, cam ring 1 and external cam 3 all can be used as driving wheel, in the present embodiment, using external cam 3 as driving wheel, as shown in Figure 1 and Figure 2.Cam ring 1, external cam 3 are all processed with internal spline, and cam ring 1 is processed with the convex gear teeth 13, and external cam 3 is processed with the evagination gear teeth 10, and external cam 3 is inserted cam ring 1 and coaxially installs with cam ring 1, as shown in Fig. 2, Fig. 3, Fig. 4, Fig. 5.External cam 3 is inserted after cam ring 1, in the end of external cam 3, is provided with seal stopper ring 6, and the interior annulus of the cylindrical of seal stopper ring 6 and cam ring 1 has the radial fit gap that is less than 1 millimeter, and this matching gap forms airtight gap A 7 radially, as shown in Figure 3.The end of the evagination gear teeth 10 is processed with pushing tow inclined-plane 9, on the end face web of cam ring 1, be processed with accordingly pushing tow pin-and-hole 12, in pushing tow pin-and-hole 12, be provided with knock-out pin 2, one end of knock-out pin 2 contacts with the pushing tow inclined-plane 9 of the evagination gear teeth 10 ends, external cam 3 rotation and cam ring 1 are when relatively static, the pushing tow inclined-plane 9 of the evagination gear teeth 10 ends can promote knock-out pin 2 produce move axially moving, as shown in Fig. 2, Fig. 3, Fig. 4, Fig. 5.

Fig. 6, Fig. 7, Fig. 8, Fig. 9, Figure 10 are respectively when different operating state, A-A sectional view as shown in Figure 3.As shown in Figure 4, Figure 5, the evagination gear teeth 10 tooth top positions are radially provided with radially locking bolt hole 11, and the convex gear teeth 13 tooth root positions are corresponding two of arranging knock hole 14 radially radially; As shown in Figure 6, the evagination gear teeth 10 are provided with centrifugal locking bolt 4 in set radially locking bolt hole 11, and the set radially knock hole 14 of the convex gear teeth 13 is provided with ejector pin 5 and ejector pin spring 8.Fig. 6 is that external cam 3 drives cam ring 1 towards the working state schematic representation of the rotation of counterclockwise shown in arrow.As shown in Figure 6, the radially locking bolt hole 11 of external cam 3 is with radially knock hole 14 centerings of cam ring 1 and in coaxial state, under the effect of rotary centrifugal force, the pressure promotion ejector pin 5 that centrifugal locking bolt 4 overcomes ejector pin spring 8 moves radially, in the radially knock hole 14 of centrifugal locking bolt 4 thereby partial insertion cam ring 1, cam ring 1 and external cam 3 are temporarily in the lock state, avoid in normal operation process, passive rotary component surmounts active rotation component speed.Figure 7 shows that driving wheel shuts down, external cam 3 and cam ring 1 are all in static working state schematic representation.As shown in Figure 7, under the pressure of ejector pin spring 8 promotes, ejector pin 5 moves radially and promotes the radially knock hole 14 that centrifugal locking bolt 4 exits cam ring 1, and cam ring 1 and the lock state of external cam 3 are disengaged.Figure 8 shows that external cam 3 is towards rotation clockwise shown in arrow, because the convex gear teeth 13 and the matching gap of the evagination gear teeth 10 make external cam 3 in rotating freely stroke, the convex gear teeth 13 are in relatively static working state schematic representation.Figure 9 shows that external cam 3 continues rotation, external cam 3 rotations are over and rotate freely stroke, the evagination gear teeth 10 and the convex gear teeth 13 are again in contact transferring power state after changing sense of rotation, and another of the radially locking bolt hole 11 of external cam 3 and cam ring 1 be knock hole 14 centerings in coaxial state radially.As shown in figure 10, external cam 3 drives cam ring 1 towards rotation clockwise shown in arrow, under the effect of rotary centrifugal force, the pressure promotion ejector pin 5 that centrifugal locking bolt 4 overcomes ejector pin spring 8 moves radially, in the radially knock hole 14 of centrifugal locking bolt 4 thereby partial insertion cam ring 1, make cam ring 1 and external cam 3 again in temporary transient lock state.

As shown in Fig. 6, Fig. 7, Fig. 8, Fig. 9, Figure 10, the convex gear teeth 13 top circles of cam ring 1 and the evagination gear teeth 10 root circles of external cam 3 have the radial fit gap that is less than 1 millimeter, and this matching gap forms airtight gap B16 radially; The convex gear teeth 13 root circles of cam ring 1 and the evagination gear teeth 10 top circles of external cam 1 have the radial fit gap that is less than 1 millimeter, and this matching gap forms airtight clearance C 18 radially.In external cam 3, drive cam ring 1 in the movement process of positive and negative both direction rotation, airtight gap A7, airtight gap B16, airtight clearance C 18 are because gap is less, there is certain dynamic airtight damping characteristic, therefore in the movement process towards positive and negative both direction rotation, the both sides of cam tooth 10 form airtight damping cavity A15 and airtight damping cavity B17 outside.Due to the damping function of airtight damping cavity A15 and airtight damping cavity B17, can alleviate the impact that active rotation parts external cam 3 produces because rotating freely stroke in initial start-up course after changing sense of rotation.

The steel ball clutch that the present invention proposes, main driving component is left half-clutch 19, right semi-clutch 24, left steel ball group 22, right steel ball group 23, in the present embodiment, adopts the steel ball of 10 millimeters of diameters to form left steel ball group 22 and right steel ball group 23.On the cylindrical of left half-clutch 19, with the cylinder end mill of 10 millimeters of diameters, circumferentially process 30 left steel bead grooves 20; On the interior annulus of right semi-clutch 24, with the cylinder end mill of 10 millimeters of diameters, circumferentially process 30 right steel bead grooves 25; Within left steel ball group 22 and right steel ball group 23 are placed on respectively left steel bead groove 20 and right steel bead groove 25, as shown in Figure 11, Figure 12, Figure 13.In work, left half-clutch 19, right semi-clutch 24 all can be used as and move axially main body, in the present embodiment, using left half-clutch 19 as moving axially main body.

Figure 14 shows that steel ball clutch is in mask work view, as shown in figure 14, left steel ball group 22, does not interfere mutually on volume when axis rotate with right steel ball group 23, so left half-clutch 19 and right semi-clutch 24 transmitting rotary power not mutually.

Figure 15 shows that steel ball clutch is in conjunction with working state schematic representation, left half-clutch 19, under the effect of steering force, has produced axis shift to the right, because pushing tow ring 27 causes return spring 26, is compressed.As shown in Figure 15, Figure 16, left steel ball group 22 and the state of right steel ball group 23 in mutual embedding, so left half-clutch 19 mutually can transmitting rotary power with right semi-clutch 24.When being applied to the steering force of left half-clutch 19, remove, under the effect of return spring 26, left half-clutch 19 is to left dislocation, and left half-clutch 19 returns to the mask work state shown in Figure 14 with right semi-clutch 24 combination working state as shown in Figure 15.

As Figure 12, shown in Figure 13, right semi-clutch 24 is processed with inner spline groove output torque, on left half-clutch 19, be processed as especially castellated connection teeth 21, because in the present embodiment, left half-clutch 19 is connected and bears brake load with braking star-wheel 32 as moving axially main body, the working surface that castellated connection teeth 21 bears brake load can be processed as inclined-plane easily, the angle of inclined working and movement direction is more than or equal to the friction angle of working surface, can guarantee that self-locking does not occur steel ball clutch in the situation that of bearing load, can be under the effect of return spring 26 normal separation.

The anti-slip back device of vehicle that the present invention proposes, is structurally connected and is formed integrated type casing by connecting bolt by left casing 29, brake hoop 30, right casing 34, and be convenient to installation and removal; The brake hoop 30 that is arranged on intermediate portion forms uni-directional brake with braking roller 31, braking star-wheel 32, and brake hoop 30 both sides are provided with to be supported otic placode and attachment hole is installed, and braking moment can be passed on to the carrying position to vehicle, as shown in Figure 17, Figure 18.

As shown in Figure 17, Figure 19, clearance type coupling, steel ball clutch are installed in integrated type casing.Input shaft 28 is arranged in left casing 29 by rolling bearing, external cam 3 and the input shaft 28 of clearance type coupling pass through spline joint, output shaft 33 is arranged in right casing 34 by rolling bearing, and cam ring 1 and the output shaft 33 of clearance type coupling pass through spline joint.Right semi-clutch 24 and the output shaft 33 of steel ball clutch pass through spline joint, the left half-clutch 19 of steel ball clutch is connected with braking star-wheel 32 by castellated connection teeth 21, castellated connection teeth groove 35, castellated connection teeth 21 is connected the working surface that teeth groove 35 bears brake load and is processed as inclined-plane with castellated, and the angle of this inclined working and movement direction is more than or equal to the friction angle of working surface.One end of the knock-out pin 2 of clearance type coupling is associated with the left half-clutch 19 of steel ball clutch, and the axial motion that knock-out pin 2 obtains can promote that left half-clutch 19 produces axial motions and the separation and the combination that realize steel ball clutch.On design parameter, need to guarantee the axially movable height that allows distance must be less than castellated connection teeth 21 of left half-clutch 19, to guarantee that castellated connection teeth 21 can not depart from and mesh with the castellated teeth groove 35 that is connected in the process of separated and the combination of steel ball clutch.

Below in conjunction with Figure 17, Figure 18, Figure 19, the working principle of the anti-slip back device of vehicle of the present invention is further described:

As shown in Figure 17, Figure 18, Figure 19, input shaft 28 passes to vehicle the external cam 3 of clearance type coupling towards rotatablely moving of direction of advance by spline, the external cam 3 of clearance type coupling passes to vehicle the cam ring 1 of clearance type coupling by the evagination gear teeth 10, the convex gear teeth 13 towards rotatablely moving of direction of advance, cam ring 1 passes to output shaft 33 by vehicle towards rotatablely moving of direction of advance by spline, and vehicle obtains onward impulse.Under this operating mode, to rightmost is pushed knock-out pin 2 in the pushing tow inclined-plane 9 of the evagination gear teeth 10,2 of knock-out pins apply a steering force to left half-clutch 19, the pressure that overcomes return spring 26 is pushed left half-clutch 19 to rightmost, make left steel ball group 22 and the state of right steel ball group 23 in mutual embedding, therefore left half-clutch 19 and right semi-clutch 24 mutually can transmitting rotary power, and actual effect is exactly that combination by steel ball clutch couples together output shaft 33 and braking star-wheel 32.As shown in figure 18, one-way brake mechanism only allows to brake star-wheel 32 towards dextrorotation veer, the direction rotation that rotatablely moves namely advancing towards vehicle, and braking star-wheel 32, towards counterclockwise rotation, is braked.Because at this moment output shaft 33 and driver for vehicle are connected with braking star-wheel 32, therefore whole driver for vehicle binds together with the braking star-wheel 32 being connected, and does not allow the direction rotation that rotatablely moves towards vehicle rollback.Therefore, vehicle is when advancing gear, the transmission system that vehicle advances rotatablely moves and is not subject to restrict, and rotatablely moving that any external force or the vehicle self gravitation on ramp make that vehicle falls back braked, thereby realizes the vehicle anti-slip back function while going up a slope of advancing.

When vehicle need to be moveed backward, according to the operation order of vehicle, vehicle first comes to a complete stop, and then hangs reverse gear, and vehicle is started to walk again.Vehicle is by front and then while coming to a complete stop, the working state of driver for vehicle and clearance type coupling as shown in Figure 9, at this moment vehicle starts to walk to rotate by counter clockwise direction again, the working state of driver for vehicle and clearance type coupling is transitioned into working state as shown in Figure 8 by working state as shown in Figure 9, then is transitioned into the working state as shown in Fig. 7, Fig. 6.In the transition and conversion process of this working state, driven wheel namely cam ring shown in Fig. 91 in standstill state at intermittence, at this of cam ring 1 intermittently in standstill state process, return spring 26 pushing tow left half-clutch 19, jacking force is passed to knock-out pin 2, knock-out pin 2 is moved along the pushing tow inclined-plane 9 of the evagination gear teeth 10.This just makes the separated and left steel ball group 22 of the left half-clutch 19 of steel ball clutch and right semi-clutch 24 and right steel ball group 23 in separated state, also makes output shaft 33 and the coupled condition of braking star-wheel 32 be disengaged.The transmission system of the reverse direction brake function of braking star-wheel 32 when at this time vehicle is fallen back rotatablely moves inoperative, so the motion of vehicle while falling back is unaffected.

From above-mentioned working principle, the anti-slip back device of vehicle that the present invention proposes is arranged in the driving transmission system of vehicle, when vehicle advances, vehicle is hung into the gear that advances, the built-in one-way brake mechanism of the anti-slip back device of vehicle drive axle transmission shaft and vehicle is automatically connected in starting-up process, thereby realize, advance while going up a slope, the driving mechanism of vehicle is automatically subject to braking action in the sense of rotation falling back, and has solved the anti-slip back problem of starting of going up a slope.When vehicle need to fall back, vehicle is hung into the gear that falls back, and being connected in starting-up process of the one-way brake mechanism that the anti-slip back device of vehicle drive axle transmission shaft and vehicle is built-in automatically terminates, and the motion of travelling that vehicle need to fall back is unaffected.

The related upward slope of the present embodiment anti-slip back device maximum transmitted moment of torsion of starting to walk is 8000 Newton meters, and boundary dimension is: 216 millimeters * 420 millimeters of Φ, sole mass is 70kg.

Claims (8)

1. a clearance type coupling, comprises cam ring (1), external cam (3), it is characterized in that:

Described cam ring (1) is coaxially installed with described external cam (3);

Described cam ring (1) at least arranges the motion that convex gear teeth (13) match to transmit positive and negative two sense of rotation with the evagination gear teeth (10) of described external cam (3), and described external cam (3) at least arranges the motion that described evagination gear teeth (10) match to transmit positive and negative two sense of rotation with the described convex gear teeth (13) of described cam ring (1);

The described convex gear teeth (13) of described cam ring (1) are provided with the described evagination gear teeth (10) of described external cam (3) matching gap along the circumferential direction going up, described matching gap can guarantee the described cam ring (1) as active rotation parts, or the described external cam (3) as active rotation parts, after changing sense of rotation in initial start-up course, there is angle of swing for being greater than 5 °, and be less than the stroke that rotates freely of 355 °.

2. clearance type coupling according to claim 1, is characterized in that:

In one end of described external cam (3), be also provided with seal stopper ring (6), the interior annulus of the outer toroid of described seal stopper ring (6) and described cam ring (1) has airtight gap A (7) radially;

The described evagination gear teeth (10) root circle of the described convex gear teeth (13) top circle of described cam ring (1) and described external cam (3) has airtight gap B (16) radially;

The described evagination gear teeth (10) top circle of the described convex gear teeth (13) root circle of described cam ring (1) and described external cam (3) has airtight clearance C (18) radially;

The dynamic airtight damping characteristic of described airtight gap A (17), described airtight gap B (16), described airtight clearance C (18) forms airtight damping cavity A (15) and airtight damping cavity B (17) when described cam ring (1) and described external cam (3) relative movement.

3. clearance type coupling according to claim 1, is characterized in that:

At the evagination gear teeth (10) tooth top position described at least one of described external cam (3), be radially provided with radially locking bolt hole (11), in described radially locking bolt hole (11), be provided with centrifugal locking bolt (4);

Corresponding two of the arranging knock hole (14) radially radially at the convex gear teeth (13) tooth root position described at least one of described cam ring (1) is provided with ejector pin (5) and ejector pin spring (8) in described radially knock hole (14);

When described cam ring (1) and described external cam (3) are when transmitting the working state of left-handed rotation campaign, the described radially locking bolt hole (11) that described external cam (3) arranges, knock hole (14) centering in coaxial state radially described in of setting corresponding to described cam ring (1);

When working state in transmitting dextrad and rotatablely moving of described cam ring (1) and described external cam (3), the described radially locking bolt hole (11) that described external cam (3) arranges, knock hole (14) centering in coaxial state radially described in another of setting corresponding to described cam ring (1).

4. clearance type coupling according to claim 1, is characterized in that:

The described evagination gear teeth (10) of described external cam (3) are provided with pushing tow inclined-plane (9);

On the end face web of described cam ring (1), be provided with pushing tow pin-and-hole (12);

In described pushing tow pin-and-hole (12), be provided with knock-out pin (2), one end of described knock-out pin (2) is associated with described pushing tow inclined-plane (9).

5. a steel ball clutch, comprises left half-clutch (19), right semi-clutch (24), it is characterized in that:

Described left half-clutch (19) is circumferentially provided with one group of left steel bead groove (20), and described right semi-clutch (24) is circumferentially provided with one group of right steel bead groove (25);

In described left steel bead groove (20), be provided with left steel ball group (22), in described right steel bead groove (25), be provided with right steel ball group (23).

6. steel ball clutch according to claim 5, also comprise return spring (26), pushing tow ring (27), it is characterized in that: on described left half-clutch (19), be provided with castellated connection teeth (21), described right semi-clutch (24) is provided with inner spline groove.

7. the anti-slip back device of vehicle, comprise input shaft (28), output shaft (33), left casing (29), right casing (34), brake hoop (30), braking star-wheel (32), braking roller (31), it is characterized in that: also comprise the clearance type coupling described in any one claim in claim 1 to 4, also comprise claim 5, described steel ball clutch in 6 described in any one claim, the other end of the described knock-out pin (2) that described clearance type coupling the is set described left half-clutch (19) set with described steel ball clutch is associated, (2) axial motion of described knock-out pin promotes described left half-clutch (19) and produces axial motion.

8. the anti-slip back device of vehicle according to claim 7, it is characterized in that: described braking star-wheel (32) is provided with castellated connection teeth groove (35), described castellated connection teeth groove (35) the described castellated connection teeth (21) set with described left half-clutch (19) is meshed to transmit motion, described castellated connection teeth (21) is with described castellated to be connected the working surface that teeth groove (35) bears brake load be inclined-plane, and the angle of this inclined working and described left half-clutch (19) movement direction is more than or equal to the friction angle of working surface.

Images