CN216034626U

CN216034626U - Scalable energy-absorbing formula jackshaft structure

Info

Publication number: CN216034626U
Application number: CN202220153099.9U
Authority: CN
Inventors: 王应
Original assignee: Zhejiang Zero Run Technology Co Ltd
Current assignee: Zhejiang Zero Run Technology Co Ltd
Priority date: 2022-01-20
Filing date: 2022-01-20
Publication date: 2022-03-15
Anticipated expiration: 2032-01-20

Abstract

The utility model discloses a telescopic energy-absorbing type intermediate shaft structure which comprises a first section fork and a second section fork, wherein the first section fork is provided with a mandrel, the second section fork is fixedly provided with a sleeve, the mandrel is in sliding fit with the sleeve, the first section fork is in sliding fit with the mandrel, and a damping reinforcing piece is arranged between the first section fork and the mandrel. The utility model provides an jackshaft is when using, and outside knuckle fork is connected through the cross respectively to first section fork and second section fork, and dabber and sleeve, first section fork sliding fit accomplish the function of the radial moment of torsion of jackshaft transmission, and the useful part of this application lies in: because the damping reinforcing part is arranged between the first section fork and the mandrel, when the vehicle body is vibrated, damping energy absorption can be formed between the first section fork and the mandrel, the steering mechanism directly invades a driver cabin when collision is avoided, the knee safety of a driver is protected, and the safety is improved.

Description

Scalable energy-absorbing formula jackshaft structure

Technical Field

The application relates to the technical field of intermediate shafts of steering systems, in particular to a telescopic energy-absorbing intermediate shaft structure.

Background

The steering system comprises a steering control component and a steering execution component, and is mainly used for transmitting the torque of a steering wheel end to a vehicle end and driving wheels to turn. The intermediate shaft is a part of a steering control component and plays a role of connecting the upper pipe column and a steering executing component steering engine. The two ends of a common intermediate shaft are connected through a joint yoke and a cross shaft, and the middle part of the common intermediate shaft is matched with an external spline shaft through an internal spline barrel to transmit torque. The spline shaft and the spline cylinder are in interference fit through an injection molding part, and sliding force is provided.

For example, in chinese patent literature, a spline type steering intermediate shaft mechanism disclosed in patent No. CN2021102552938 at 7/16/2021 relates to the field of component performance testing, and includes a male shaft, a female shaft, an upper inner yoke, a lower steering yoke, an EPS yoke and a cross shaft assembly, one end of the male shaft is sleeved with one end of the female shaft through spline type fitting, the other end of the male shaft is provided with the lower inner yoke, the other end of the male shaft and the lower inner yoke are in interference fit through spline teeth, one end of the lower inner yoke is connected with the lower steering yoke, the other end of the female shaft and the upper inner yoke are in interference fit through spline teeth, one end of the upper inner yoke is connected with the EPS yoke, wherein the lower inner yoke and the lower steering yoke, and the upper inner yoke and the EPS yoke are connected through a cross shaft assembly respectively.

The traditional intermediate shaft internal spline shaft and the external spline cylinder are fully extruded by an injection molding part, and the sliding force below about 80N is provided. The intermediate shaft is mainly used for connecting the upper tubular column and the steering machine and transmitting the torque of the steering wheel end to the steering machine so as to drive wheels to move transversely, so that a driver can steer the whole vehicle. However, if the whole vehicle is driven and the front collision occurs, the front cabin parts and the steering wheel of the whole vehicle can press the front panel of the vehicle body and invade the driver cabin. When the steering engine moves to the passenger compartment, the traditional intermediate shaft only has sliding force below 80N and cannot absorb the energy of the part, so that the steering mechanism is very direct and quick to invade the driver compartment, and potential safety hazards are formed.

SUMMERY OF THE UTILITY MODEL

Based on the defects in the prior art, the utility model provides a telescopic energy-absorbing type intermediate shaft structure which not only provides a sliding stroke in an assembling process, but also can absorb collision capacity in collision so as to ensure the knee safety of a driver.

In order to achieve the purpose of the utility model, the utility model adopts the following technical scheme.

The utility model provides a scalable energy-absorbing formula jackshaft structure, includes first festival fork and second festival fork, and first festival fork is equipped with the dabber, and the fixed sleeve that is equipped with on the second festival fork, dabber and sleeve sliding fit, first festival fork and dabber sliding fit are equipped with the damping reinforcement between first festival fork and the dabber. The utility model provides an jackshaft is when using, outside knuckle fork is connected through the cross respectively to first section fork and second section fork, dabber and sleeve, first section fork sliding fit, accomplish the function of the radial moment of torsion of jackshaft transmission, because be equipped with the damping reinforcement between first section fork and the dabber, when the automobile body receives vibrations, can form the damping energy-absorbing between first section fork and the dabber, steering mechanism directly invades the driver cabin when avoiding colliding, protect driver's knee safety, the security is improved.

Preferably, a first spline and a second spline are respectively arranged at two ends of the mandrel, and a guide spline groove matched with the first spline is arranged on the sleeve; be equipped with the spacing spline groove of cooperation second spline on the first section fork, be equipped with the mounting groove that corresponds spacing spline groove on the first section fork, the damping reinforcement adopts the fastener of connecting the mounting groove both sides. Guide spline groove and first spline cooperation, accomplish the function of the radial moment of torsion of jackshaft transmission, and spacing spline groove and the cooperation of second spline, because fastener locking mounting groove, cause the damping of spacing spline groove and second spline very big, thereby when the jackshaft is used, if the collision takes place, spacing spline groove and second spline can relative slip, thereby form damping absorbing effect, the effect that has the energy-absorbing, damping effect is reliable, the jackshaft radial drive effect is reliable.

Preferably, the sleeve is provided with riveting convex points corresponding to the inner part of the guide spline groove. Because receive processing technology's restriction among the prior art, the unable tight thread joint close completely of processing of spline and spline groove, so can have the clearance, the existence in clearance can lead to easy production collision and noise when spline and spline groove cooperate, influences the reliability and the life of spline, and the sleeve reduces the clearance between first spline and the direction spline groove through setting up the riveting bump in this application, can improve the transmission reliability and the life of first spline.

Preferably, the riveting convex points are in a long strip shape, and the riveting convex points are arranged along the axis of the first spline. The riveting salient point has reliable limiting and adjusting functions.

Preferably, the minor diameter of the first spline is not less than the diameter of the mandrel, and the major diameter of the second spline is not greater than the diameter of the mandrel. The mandrel can completely slide into the first spline without interference, and the application reliability of the intermediate shaft in the steering mechanism is ensured.

Preferably, the mounting groove is an open groove arranged along a limiting spline groove bus, and two corresponding mounting grooves are arranged on two opposite sides of the limiting spline groove. Make things convenient for the fastening locking of mounting groove, realize that spacing spline groove compresses tightly the reliable damping of second spline, guarantee the shock attenuation energy-absorbing effect between spacing spline groove and the second spline.

Preferably, the fastening piece adopts a fastening bolt, the first section of fork is provided with a mounting hole matched with the fastening bolt, and the outer end of the fastening bolt of the first section of fork is provided with a fastening nut. The fastening and pressing action of the fastening piece is reliable.

Preferably, a buffer is arranged between the groove bottom of the limiting spline groove and the end part of the second spline. The bolster can adopt elastic rubber or spring etc. and the improvement compresses tightly the buffering, avoids the direct collision between second spline tip and the spacing spline groove to can provide the power that resets, spacing spline groove and second spline between the damping effect can continuously provide.

The utility model has the following beneficial effects: the sliding stroke in the assembling process is provided, the collision capacity can be absorbed in the collision process, the safety of knees of a driver is guaranteed, and the structure is reliable and stable.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic structural view of the first yoke in the present invention.

FIG. 3 is a state diagram of the mandrel mating guide spline grooves and limit spline grooves of the present invention.

In the figure: a first section fork 1 mandrel 2 first spline 3 second spline 4 second section fork 5 sleeve 6 guide spline groove 7 riveting convex point 8 limiting spline groove 9 mounting groove 10 fastening bolt 11 cross 12 steering yoke 13.

Detailed Description

The utility model is further illustrated with reference to the figures and the specific embodiments.

In the embodiment of the method, the first step,

as shown in fig. 1 to 3, a telescopic energy-absorbing intermediate shaft structure comprises a first yoke 1 and a second yoke 5, wherein the first yoke 1 is provided with a mandrel 2, the second yoke 5 is fixedly provided with a sleeve 6, the mandrel 2 is in sliding fit with the sleeve 6, the first yoke 1 is in sliding fit with the mandrel 2, and a damping reinforcing member is arranged between the first yoke 1 and the mandrel 2. The two ends of the mandrel 2 are respectively provided with a first spline 3 and a second spline 4, the small diameter of the first spline 3 is equal to the diameter of the mandrel 2, and the large diameter of the second spline 4 is equal to the diameter of the mandrel 2. The sleeve 6 is provided with a guide spline groove 7 matched with the first spline 3; and riveting salient points 8 corresponding to the inner part of the guide spline grooves 7 are arranged on the sleeve 6. The riveting salient point 8 is in a long strip shape, and the riveting salient point 8 is arranged along the axis of the first spline 3. Be equipped with the spacing spline groove 9 of cooperation second spline 4 on the first section fork 1, be equipped with the mounting groove 10 that corresponds spacing spline groove 9 on the first section fork 1, mounting groove 10 is the open slot that sets up along spacing spline groove 9 generating line, and mounting groove 10 is equipped with two of correspondence in the both sides that spacing spline groove 9 is relative. The damping reinforcing member employs a fastening member connecting both sides of the installation groove 10. The fastener adopts fastening bolt 11, is equipped with the mounting hole of cooperation fastening bolt 11 on the first section fork 1, and first section fork 1 is equipped with fastening nut in fastening bolt 11's outer end. A buffer gap is arranged between the bottom of the limiting spline groove 9 and the end part of the second spline 4, and a buffer piece is arranged in the buffer gap. The buffer member can be an elastic rubber block or a spring, and the like, and the buffer member is hidden in the drawing of the embodiment.

The jackshaft is when using, outside knuckle fork 13 is connected through cross 12 respectively to first section fork 1 and second section fork 5, dabber 2 and

sleeve

6, 1 sliding fit of first section fork, accomplish the function of the radial moment of torsion of jackshaft transmission, because be equipped with the damping reinforcement between first section fork 1 and the dabber 2, when the automobile body receives vibrations, can form the damping energy-absorbing between first section fork 1 and the dabber 2, steering mechanism directly invades the driver's cabin when avoiding colliding, protection driver's knee safety, the security is improved. Guide spline groove 7 and the cooperation of first spline 3, accomplish the function of the radial moment of torsion of jackshaft transmission, and spacing spline groove 9 and the cooperation of second spline 4, because fastener locking mounting groove 10, it is very big to cause the damping of spacing spline groove 9 and second spline 4, thereby when the jackshaft is used, if collide, spacing spline groove 9 and second spline 4 can slide relatively, thereby form the absorbing effect of damping, the effect that has the energy-absorbing, damping effect is reliable, the jackshaft radial drive effect is reliable. Because spline and spline groove's processing can't be tight thread joint completely among the prior art, so can have the clearance, the existence in clearance can lead to easy production collision and noise when spline and spline groove cooperate, influences the reliability and the life of spline, and sleeve 6 reduces the clearance between first spline 3 and the direction spline groove 7 through setting up riveting bump 8 in this application, can improve the transmission reliability and the life of first spline 3.

Claims

1. The utility model provides a scalable energy-absorbing formula jackshaft structure, its characterized in that includes first section fork and second section fork, and first section fork is equipped with the dabber, and the last fixed sleeve that is equipped with of second section fork, dabber and sleeve sliding fit, first section fork and dabber sliding fit are equipped with the damping reinforcement between first section fork and the dabber.

2. The telescopic energy-absorbing intermediate shaft structure as claimed in claim 1, wherein the mandrel is provided at both ends thereof with a first spline and a second spline, respectively, and the sleeve is provided with a guide spline groove for fitting the first spline; be equipped with the spacing spline groove of cooperation second spline on the first section fork, be equipped with the mounting groove that corresponds spacing spline groove on the first section fork, the damping reinforcement adopts the fastener of connecting the mounting groove both sides.

3. The telescopic energy-absorbing intermediate shaft structure as claimed in claim 2, wherein the sleeve is provided with riveting protrusions corresponding to the inner portions of the guide spline grooves.

4. The retractable energy-absorbing intermediate shaft structure as claimed in claim 3, wherein the riveting protrusions are in the shape of long strips, and the riveting protrusions are arranged along the axis of the first spline.

5. The telescoping energy absorbing countershaft structure of claim 2 wherein the minor diameter of the first spline is no less than the diameter of the mandrel and the major diameter of the second spline is no greater than the diameter of the mandrel.

6. The telescopic energy-absorbing intermediate shaft structure as claimed in claim 2, wherein the mounting grooves are open grooves formed along the generatrix of the limit spline groove, and two corresponding mounting grooves are formed on two opposite sides of the limit spline groove.

7. The telescopic energy-absorbing intermediate shaft structure as claimed in claim 2 or 6, wherein the fastening member is a fastening bolt, the first yoke is provided with a mounting hole for fitting the fastening bolt, and the first yoke is provided with a fastening nut at the outer end of the fastening bolt.

8. The telescopic energy-absorbing intermediate shaft structure as claimed in claim 2 or 6, wherein a buffer is provided between the groove bottom of the limit spline groove and the end of the second spline.