CN202294936U

CN202294936U - Steering handle with damping device

Info

Publication number: CN202294936U
Application number: CN2011204330553U
Authority: CN
Inventors: 李红雨; 周学军; 冯平
Original assignee: Zhejiang Nuoli Machinery Co Ltd
Current assignee: Zhejiang Nuoli Machinery Co Ltd
Priority date: 2011-11-04
Filing date: 2011-11-04
Publication date: 2012-07-04
Anticipated expiration: 2021-11-04

Abstract

A power-assisting steering handle with a damping device comprises a handle, a handle shaft and the damping device, wherein the damping device comprises a gear, a gear rack and a hydraulic cylinder; the gear is arranged on the handle shaft; the gear rack is arranged on the hydraulic cylinder; the gear and the gear rack are meshed with each other; the hydraulic cylinder comprises a left cylinder, a right cylinder and a plunger rod; the left cylinder and the right cylinder share the plunger rod; the plunger rod is provided with a gear rack; and a damping hole I communicated with the left cylinder and the right cylinder is formed in the plunger rod. The power-assisting steering handle can provide a reacting force for the steering of the handle promptly according to the steering speed of the handle; and a steering wheel or the handle is prevented from steering too fast due to the hydraulic damping force generated by the damping hole. Compared with the prior art, the power-assisting steering handle has the advantages that the structure is simple; the cost is low; the steering effect of an industrial vehicle with a power-assisting steering function can be safer and more reliable; and the steering handling feeling is improved.

Description

The servo-steering handle of band damping arrangement

Technical field

The utility model relates to a kind of servo-steering handle of industrial vehicle, particularly relates to the servo-steering handle of being with damping arrangement.

Background technology

The industrial vehicle that disposes servo steering systems such as electronics or electric liquid turn to is well-known; Steering transmission linkage like steering handwheel, handle and so on is connected with the angular drive device; Its angle according to rotation produces electronic signal, and this electronic signal is passed to steering hardware, makes the drive wheel of industrial vehicle turn to; Make car realize more easily turning to through servo steering device; To such an extent as to the use location control setup will not cause chaufeur to carry out steering operation with too fast or even speed that surpass the performer speed of response, will cause the chaufeur forfeiture to turn to the control sense like this, the motion of vehicle trends towards insubjection.For avoiding this counter productive more than the appearance; Often through using steering effort positioner like miniature car; This steering effort positioner can apply opposition to bearing circle or handle according to the motoring condition of vehicle, therefore can avoid turning to too fast, yet; Steering effort positioner cost is too high, and the low and middle-end industrial vehicle is difficult to accept the increase of this cost.

Though friction braking can reach the effect of the cornering resistance that gives steering handwheel; It also is a kind of comparatively economic selection; But also there is certain defective in friction braking, one of which: friction braking can only produce the resistance of constant size; Chaufeur applies steering effort under the situation of any steering angle or turning velocity size is identical, so just can not fully fully avoid the too fast rotation of steering handwheel; Its two, according to the groundwork of tribology, each other there is two states in the friction force of mobile; That is: kinetic force of friction and static friction force, and static friction force will be far longer than kinetic force of friction, when steering operation; Can quiet, kinetic force of friction switching process inevitably occur, at the beginning of turning to, chaufeur has to overcome bigger static friction force; Steering effort diminishes suddenly then, gives to turn to and brings the adverse consequences that is difficult to confirm.

Summary of the invention

The utility model provides a kind of servo-steering handle of simple in structure, economical and practical band damping arrangement, solved in the prior art bearing circle or handle turn to too fast, and the problem of steering manipulation sense difference.

The servo-steering handle of band damping arrangement comprises handle, Handle axis and damping arrangement, and damping arrangement comprises gear, tooth bar and hydraulic ram, and gear is arranged on the Handle axis, and tooth bar is arranged on the hydraulic ram, and wheel and rack is meshing with each other.

In the utility model technique scheme, when handle rotated, the gear driven tooth bar that is arranged on the Handle axis was done straight-line motion; The hydraulic ram at tooth bar place provides hydraulic damping power; This dumping force reacts on handle, thereby reduces the turning velocity of handle, and it is too fast to prevent that handle from turning to.The size of the hydraulic damping power that hydraulic ram provides and the speed of rotary handle are the forward correlationship, and promptly the speed of rotary handle is fast more, and the dumping force that hydraulic ram provides is big more.

As preferably, described hydraulic ram comprises the plunger rod of the band tooth bar that left and right cylinder body and left and right cylinder body are shared, is provided with the hydraulic oil channel that is communicated with left and right cylinder body in the plunger rod.Through rotating band carry-over bar straight-line motion, fluid flows in left and right cylinder body through the hydraulic oil channel on the plunger rod back and forth in this technical scheme, because the existence of hydraulic oil channel shock damping action can produce tangible resistance during the rotary handle rotation.

Preferred as further, the two ends of described plunger rod are respectively equipped with the damping body that has damping hole one, and the inside of said plunger rod is provided with the through hole that is communicated with said damping hole one, and said damping hole one is formed said hydraulic oil channel with said through hole.

As preferably, described hydraulic ram comprises the piston that is provided with damping hole two, two rod piston rod and cylinder body two.Drive tooth bar left and right sides straight-line motion through gear cw or left-hand revolution in this technical scheme, fluid flows in the cylinder body two of piston both sides through damping hole two back and forth, because the existence of damping hole two can produce certain dumping force during motion.

As preferably, take up space in order to save the hydraulic ram institute that moves back and forth, described hydraulic ram comprises piston, cylinder body two, single rod piston rod and the oil sump tank that is provided with damping hole two, the rod end chamber of said hydraulic ram is communicated with oil sump tank.

The utility model is through the constituent elements motion of rack-and-gear interlock and then drive hydraulic ram; Make the damp channel of hydraulic oil flow through forming with modes such as damping holes; The hydraulic damping power that produces is used to control bearing circle or handle turning velocity, avoids handling maneuver too fast, can the handle that become the forward correlationship with turning velocity cornering resistance be provided in real time according to the handle turning velocity; Make the operator have good handling maneuver sense; And compared with prior art have advantage simple in structure, with low cost, bring safer, failure-free turning efficiency to having power-steering industrial vehicle.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the semisectional view of the utility model hydraulic ram embodiment one;

Fig. 3 is the structural representation of the utility model hydraulic ram embodiment two;

Fig. 4 is the structural representation of the utility model hydraulic ram embodiment three;

Among the figure: 1-handle, 2-Handle axis, 3-gear, 4-tooth bar, 5-plunger rod, 6-left cylinder, the right cylinder body of 7-, 8-damping hole one, 9-damping body, 10-through hole, 11-car body, 12-damping hole two, 13-piston, the two rod piston rods of 14-, 15-cylinder body two, the single rod piston rod of 16-, 17-oil sump tank.

The specific embodiment

As shown in Figure 1, the servo-steering handle of band damping arrangement comprises handle 1, Handle axis 2 and damping arrangement.

Turn to too fast for controlling bearing circle or handle; The steering tiller of this specific embodiment comprises gear 3, tooth bar 4 and hydraulic ram; Its middle gear 3 is fixedly connected on the bottom of Handle axis 2, and tooth bar 4 is captiveed joint with the plunger rod 5 of hydraulic ram, and gear 3 is meshing with each other with tooth bar 4.Drive tooth bar left and right sides straight-line motion through gear cw or left-hand revolution, the dumping force that produces in the hydraulic ram reacts on the handle of rotation, thus the speed that control handle turns to, and it is too fast to prevent that handle from turning to.

As shown in Figure 2; The above-mentioned hydraulic ram specific embodiment one: hydraulic ram is the Y-axis symmetrical structure; The plunger rod 5 of the band tooth bar 4 that the left and

right cylinder body

6,7 that is fixedly installed by symmetry and left and

right cylinder body

6,7 are shared is formed, and wherein the two ends of plunger rod 5 are respectively equipped with the damping body 9 that has damping hole 1, and the inside of plunger rod 5 is provided with the through hole 10 that is communicated with damping hole 1; Damping body 9 is through being located at the two ends of plunger rod 5 in the thread connecting mode; Offer damping hole 1 in the damping body 9, the outside face of plunger rod 5 is provided with and gear 3 ingear tooth bars 4, and left and

right cylinder body

6,7 is fixed on the car body 11.Like this; Drive tooth bar 4 left and right sides straight-line motions through gear 3 cws or left-hand revolution; The hydraulic oil channel that hydraulic oil liquid can be formed through damping hole 1 and through hole 10 is at left and right cylinder body 6, flow between 7 back and forth; Because the existence of damping hole 1 can produce certain dumping force during the steering tiller motion.

Of Fig. 3; The hydraulic ram specific embodiment two: hydraulic ram is the Y-axis symmetrical structure; Form by the piston that is provided with damping hole 2 12 13, two rod piston rod 14 and cylinder body 2 15; Can offer one or more damping holes 2 12 as required on the piston 13, an end of two rod piston rods 14 is captiveed joint on same straight line with tooth bar 4.Like this, drive tooth bar 4 left and right sides straight-line motions through gear 3 cws or left-hand revolution, fluid can flow in the cylinder body 2 15 of piston 13 both sides through damping hole 2 12 back and forth, because the existence of damping hole 2 12 can produce certain dumping force during motion.

As shown in Figure 4, consider the restriction of installing space, the hydraulic ram specific embodiment three: be made up of the piston that is provided with damping hole 2 12 13, cylinder body 2 15, single rod piston rod 16 and oil sump tank 17, wherein the rod end chamber of hydraulic ram is communicated with oil sump tank 17.Like this; Hydraulic ram shared two relatively rod hydraulic rams in space when motion are wanted much less; Single rod piston rod 16 is captiveed joint on same straight line with tooth bar 4; When gear 3 cws or left-hand revolution drive tooth bar 4 left and right sides straight-line motions, fluid can flow in the cylinder body 2 15 of piston 13 both sides through damping hole 2 12 back and forth, and refluxes or in time additional fluid through oil sump tank 17.Because the existence of damping hole 2 12 can produce certain dumping force during motion.

The principle of work of the utility model is following:

The gear 3 that when handle 1 receives a steering effort, just is fixed on Handle axis 2 bottoms is along with rotation; Gear 3 drives ingear tooth bar 4 and does straight-line motion; The plunger rod 5 of the hydraulic ram that is connected with tooth bar 4 is also done straight-line motion, thus this moment fluid through damping hole 1 and through hole 10 at left and right cylinder body 6, flowing back and forth between 7 produces hydraulic damping power.Because the effect of power is mutual, this dumping force reacts on the handle 1 of rotation through rack and pinion mechanism, thereby control handle 1 rotation is too fast, improves and controls sense.Particularly, when the steering effort on putting on handle 1 was big, the dumping force that produces when hydraulic oil passes through damping hole 1 with through hole 10 was big more, and this has just effectively guaranteed that turning velocity is difficult for the realization of too fast security purpose.

Claims

1. be with the servo-steering handle of damping arrangement; Comprise handle (1), Handle axis (2) and damping arrangement; It is characterized in that: said damping arrangement comprises gear (3), tooth bar (4) and hydraulic ram; Gear (3) is arranged on the Handle axis (2), and tooth bar (4) is arranged on the hydraulic ram, and gear (3) is meshing with each other with tooth bar (4).

2. the servo-steering handle of band damping arrangement according to claim 1; It is characterized in that: described hydraulic ram comprises the plunger rod (5) of the band tooth bar (4) that left and right cylinder body (6,7) and left and right cylinder body (6,7) are shared, is provided with the hydraulic oil channel that is communicated with left and right cylinder body (6,7) in the plunger rod (5).

3. the servo-steering handle of band damping arrangement according to claim 2; It is characterized in that: the two ends of described plunger rod (5) are respectively equipped with the damping body (9) that has damping hole one (8); The inside of said plunger rod (5) is provided with the through hole (10) that is communicated with said damping hole one (8), and said damping hole one (8) and said through hole (10) are formed said hydraulic oil channel.

4. the servo-steering handle of band damping arrangement according to claim 1 is characterized in that: described hydraulic ram comprises piston (13), two rod piston rod (14) and the cylinder body two (15) that is provided with damping hole two (12).

5. the servo-steering handle of band damping arrangement according to claim 1; It is characterized in that: described hydraulic ram comprises piston (13), cylinder body two (15), single rod piston rod (16) and the oil sump tank (17) that is provided with damping hole two (12), and the rod end chamber of said hydraulic ram is communicated with oil sump tank (17).