CN209972563U

CN209972563U - Adjustable steering column of forklift

Info

Publication number: CN209972563U
Application number: CN201920710242.8U
Authority: CN
Inventors: 翁利达
Original assignee: Yuyao Jiali Forklift Parts Co Ltd
Current assignee: Yuyao Jiali Forklift Parts Co Ltd
Priority date: 2019-05-17
Filing date: 2019-05-17
Publication date: 2020-01-21
Anticipated expiration: 2029-05-17

Abstract

The utility model discloses an adjustable steering column of forklift, which comprises an upper steering tube assembly and a lower steering tube assembly, wherein the input end of the upper steering tube assembly is connected with a steering wheel, the output end of the lower steering tube assembly is connected with a steering gear, and the output end of the upper steering tube assembly is movably connected with the lower steering tube assembly; the locking device is arranged at the joint of the output end of the upper steering tube assembly and the lower steering tube assembly and used for limiting the relative sliding of the upper steering tube assembly and the lower steering tube assembly, and the locking device has adjustable clamping force; the upper end steering pipe assembly is also connected with a crushing mechanism and a guide mechanism. The utility model discloses a scalable connection's upper end steering tube assembly and lower extreme steering tube assembly have realized the adjustable of steering column height from top to bottom, set up locking device in the junction, possess handle angularly adjustable, the function of clamp force size adjustable, and it is convenient to adjust, still through setting up conquassation mechanism and guiding mechanism, the effect of buffer part impact improves driving safety.

Description

Adjustable steering column of forklift

Technical Field

The utility model relates to a fork truck turns to technical field of device, especially relates to an adjustable steering column of fork truck.

Background

The forklift belongs to the industrial vehicle industry in the field of engineering machinery, and along with the high-speed development of modern industry, the forklift is used as an important logistics transportation tool in modern industrial production at present, and the application field of the forklift is more and more extensive.

The steering mechanism of a vehicle is composed of a steering wheel, a steering shaft, a steering column and the like, and is used for transmitting the steering force of a driver for rotating the steering wheel to a steering gear. The steering shaft is an important component in a vehicle steering system, and the design of the steering shaft must ensure that the steering shaft can reliably transmit torque so that a steering wheel is positioned to conform to the driving posture of a driver. In order to meet the requirements of drivers of different statures and driving postures on the optimal operation position of a steering wheel, an automobile steering column generally has an adjusting function, and when the steering column is adjusted to a proper position, a locking mechanism is adopted to clamp the steering column, so that the position of the steering column is ensured to be fixed. At present, a common steering column locking mechanism applies clamping force to a steering column through a spiral or cam structure, however, the clamping force of the steering column cannot be adjusted and cannot compensate for a later abrasion gap, and the latter is complex in manufacture, complicated in structure and inconvenient to install, so that the requirements of customers cannot be completely met.

In addition, when the forklift runs and collides, the driver is impacted to the steering wheel under the influence of inertia, and if no corresponding protective measures exist, the driver is greatly injured. In the prior art, the safety performance of a vehicle is improved by designing a collapsing steering column system with a buffering function, and the injury to a driver caused by an accident is reduced. A steering column system collapse structure in the prior art is provided with a collapse energy absorption device, but the structure is complex and the maintenance is not easy after the collapse energy absorption device is damaged. Therefore, it is very important to design a collapsible steering column system that is simple in structure and easy to maintain.

Therefore, those skilled in the art are dedicated to develop an adjustable steering column for a forklift, which can be conveniently adjusted in position to meet the operation requirement and can play a role in buffering to protect the driver during impact.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned defect of prior art, the utility model aims to solve the technical problem that the inconvenient problem of clamp force adjustment and fork truck steering column do not have the problem of safety protection performance more when present fork truck steering column adjusts.

In order to achieve the purpose, the utility model provides an adjustable steering column of a forklift, the upper end and the lower end of the adjustable steering column are respectively connected with a steering wheel and a steering gear, and the adjustable steering column is characterized by comprising an upper steering tube assembly and a lower steering tube assembly, wherein the input end of the upper steering tube assembly is connected with the steering wheel, the output end of the lower steering tube assembly is connected with the steering gear, and the output end of the upper steering tube assembly is movably connected with the lower steering tube assembly; the locking device is arranged at the joint of the output end of the upper steering tube assembly and the lower steering tube assembly and used for limiting the relative sliding of the upper steering tube assembly and the lower steering tube assembly, the positioning bolt extends out of the upper steering tube assembly towards the side face, the locking device comprises a locking nut, a sliding block and a locking handle, the locking nut is sleeved on the positioning bolt and is in threaded connection with the positioning bolt, the sliding block is sleeved on the positioning bolt and is matched with the positioning bolt to clamp the lower steering tube assembly, the locking handle is sleeved on the locking nut and is used for controlling the locking nut to rotate, the lower steering tube assembly is provided with a sliding groove for embedding the sliding block and the positioning bolt, and the sliding block and the; the upper end steering tube assembly is also connected with a crushing mechanism and a guide mechanism, the crushing mechanism comprises a locking block fixedly arranged on a forklift body and an upper mounting bracket fixedly connected with the upper end steering tube assembly, the locking block is clamped on the upper mounting bracket, the locking block and the upper mounting bracket are fixed through a crushing piece, the guide mechanism comprises a guide bracket fixed on the upper end steering tube assembly and a guide piece fixedly connected on the forklift body, and the guide piece can move along a track set by the guide bracket.

Furthermore, the upper steering tube assembly comprises an upper sleeve and an upper rotating shaft coaxially arranged in the upper sleeve through a bearing, wherein the output end of the upper rotating shaft is hollow and is provided with an internal spline; the lower steering tube assembly comprises a lower sleeve and a lower rotating shaft coaxially arranged in the lower sleeve through a bearing, wherein an external spline is formed on the outer circumferential surface of the lower rotating shaft; an upper sleeve at the output end of the upper steering tube assembly coaxially extends into an annular gap between the lower sleeve and the lower rotating shaft, and the external spline and the internal spline are matched with each other.

Furthermore, the locking nut and the locking handle are in splined connection, the locking nut is provided with external spline teeth, and the locking handle is provided with internal spline teeth.

Furthermore, the locking nut is provided with a limiting clamp spring for axially limiting the locking handle.

Furthermore, bosses embedded into the sliding grooves are respectively arranged on two sides of the sliding block.

Furthermore, the locking piece has two, all is equipped with two holes that are used for installing the conquassation piece on every locking piece.

Furthermore, guiding mechanism still includes linking bridge and fixed bolster, and the fixed bolster passes through bolt fixed connection on the fork truck automobile body, linking bridge and fixed bolster fixed connection, and the guide is fixed to be set up on linking bridge.

Furthermore, the guide support is U-shaped, two wings of the guide support are provided with oblong guide holes, and the guide piece is slidably arranged in the guide holes.

Preferably, the crushers are rivets.

Preferably, the guide is a pin.

The utility model discloses an adjustable steering column of fork truck has following technical characterstic:

(1) the telescopic upper steering pipe assembly and the telescopic lower steering pipe assembly are adopted to replace a steering pipe with a fixed length in the prior art, and an up-down adjustable locking device for locking the upper steering pipe assembly and the lower steering pipe assembly to limit relative sliding is arranged at the joint of the upper steering pipe assembly and the lower steering pipe assembly, so that the up-down height of the steering device is adjustable, and the ergonomic requirement is met;

(2) the locking device has simple structure and low cost, has the functions of adjustable handle angle and adjustable clamping force, is convenient to adjust and is easy to install and maintain;

(3) through setting up conquassation mechanism and guiding mechanism, when having realized human and steering wheel and taking place the striking, the effect of buffering partial impact, and then reduce or avoid the injury that causes the driver, improve driving safety nature.

The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings, so as to fully understand the objects, the features and the effects of the present invention.

Drawings

Fig. 1 is the overall structure schematic diagram of the adjustable steering column of the forklift of the utility model.

Fig. 2 is a schematic structural diagram of a lock nut in the locking device of the forklift adjustable steering column of the present invention.

Fig. 3 is a schematic structural view of a slider in the locking device.

Fig. 4 is a schematic view of the structure of a locking handle in the locking device.

Fig. 5 is a schematic structural diagram of a limit clamp spring in the locking device.

Fig. 6 is a schematic structural view of the crushing mechanism of the forklift adjustable steering column of the present invention.

Fig. 7 is a schematic structural view of the guiding mechanism of the forklift adjustable steering column of the present invention.

In the figure, 1 steering wheel, 2 upper end steering tube assembly, 21 upper sleeve, 22 upper rotating shaft, 23 positioning bolt, 3 lower end steering tube assembly, 31 lower sleeve, 32 lower rotating shaft, 33 sliding groove, 4 locking device, 41 locking nut, 42 sliding block, 421 limit surface, 422 boss, 43 locking handle, 44 limit clamp spring, 5 crushing mechanism, 51 locking block, 52 upper mounting bracket, 53 rivet hole, 54 mounting hole, 6 guiding mechanism, 61 guiding bracket, 62 connecting bracket, 63 fixing bracket, 64 pin, 65 guiding hole, 7 steering gear.

Detailed Description

As shown in fig. 1, the utility model discloses an adjustable steering column of fork truck, its upper and lower both ends are connected with steering wheel 1 and steering gear 7 respectively, including upper end steering tube assembly 2 and lower extreme steering tube assembly 3, wherein, the input of upper end steering tube assembly 2 is connected with steering wheel 1, and the output of lower extreme steering tube assembly 3 is connected with steering gear 7, and the output of upper end steering tube assembly 2 is movably connected with lower extreme steering tube assembly 3. The torque generated by the operator operating the steering wheel is transmitted to the steering gear 7 through the upper end steering assembly and the lower end steering assembly in sequence, so that the steering of the vehicle is realized.

The upper end steering tube assembly 2 comprises an upper sleeve 21 and an upper rotating shaft 22 coaxially arranged in the upper sleeve 21 through a bearing, wherein the input end of the upper rotating shaft 22 is connected with the steering wheel 1, and the output end is hollow and provided with an internal spline; the lower end steering tube assembly 3 comprises a lower sleeve 31 and a lower rotating shaft 32 coaxially arranged in the lower sleeve 31 through a bearing, wherein the outer circumferential surface of the lower rotating shaft 32 is provided with an external spline, and the output end of the external spline is connected with the steering gear 7; the upper sleeve 21 at the output end of the upper steering tube assembly 2 coaxially extends into an annular gap between the lower sleeve 31 and the lower rotating shaft 32, and can freely slide in the gap along the axis of the upper sleeve 21, so that the height adjustment of the steering column is realized. The external splines cooperate with the internal splines for transmitting the torque of the upper shaft 22 to the lower shaft 32.

A locking device 4 is arranged at the joint of the output end of the upper end steering tube assembly 2 and the lower end steering tube assembly 3 for limiting the relative sliding between the two, a positioning bolt 23 extends from the upper end steering tube assembly 2 to the side, the locking device 4 comprises a locking nut 41 (shown in fig. 2), a sliding block 42 (shown in fig. 3) and a locking handle 43 (shown in fig. 4), the locking nut 41 is sleeved on the positioning bolt 23 and is in threaded connection, the sliding block 42 is sleeved on the positioning bolt 23 and is matched with the positioning bolt 23 to clamp the lower end steering tube assembly 3, the locking handle 43 is sleeved on the locking nut 41 and is used for controlling the locking nut 41 to rotate, the lower end steering tube assembly 3 is provided with a sliding groove 33 for embedding the sliding block 42 and the positioning bolt 23, and the sliding block 42 and the positioning bolt 23 can move. The locking nut 41 and the locking handle 43 are in spline connection, external spline teeth are arranged on the locking nut 41, and internal spline teeth are arranged on the locking handle 43. The outer spline teeth are arranged on the outer circular surface of the locking nut 41 in a circle, the inner spline teeth are arranged on the inner circular surface of the locking handle 43 in a circle, the outer spline teeth of the locking nut 41 are meshed with the inner spline teeth of the locking handle 43, the locking nut can be controlled to rotate by pulling the locking handle 43, and therefore clamping and releasing of the middle connection position of the steering column are achieved, and adjustment of the clamping force is achieved. The locking nut 41 with the external spline teeth is adopted, so that the structure is simple, and the clamping force is convenient to adjust.

Preferably, the lock nut 41 is provided with a limit circlip 44 (as shown in fig. 5) for axially limiting the lock handle 43, and correspondingly, the lock nut 41 has a circlip groove for installing the limit circlip 44, and the circlip groove is an annular groove extending along the whole circumferential direction on the outer circumferential surface of the lock nut 41. The lock nut 41 is further provided with a limiting surface 421 for axially limiting the lock handle 43 in the circumferential direction, the lock handle 43 is clamped between the limiting snap spring 44 and the limiting surface 421 on the lock nut 41, the limiting surface 421 is located between the sliding block 42 and the lock handle 43, and the limiting surface 421 is matched with the limiting snap spring 44 to realize the fixation of the lock handle 43 on the lock nut 41.

The outer surface of the positioning bolt 23 is provided with an external thread, the lock nut 41 is sleeved on the positioning bolt 23 and is in threaded connection with the positioning bolt 23, and the positioning bolt 23 is inserted into the chute 33 of the lower steering tube assembly 3. The two sides of the sliding block 42 are respectively provided with a boss 422 embedded in the sliding slot 33, which plays a guiding role when the positioning bolt 23 slides, so that the positioning bolt 23 can slide up and down along the sliding slot 33 of the steering column.

The installation process of the locking device 4 is as follows: the positioning bolt 23 penetrates through the chute 33 of the steering column, the sliding block 42 penetrates through the positioning bolt 23, and the boss 422 on the sliding block 42 is embedded into the chute 33; screwing the locking nut 41 on the positioning bolt 23 and pressing the sliding block 42 tightly to enable the sliding block 42 to clamp the lower sleeve 31 of the lower steering column assembly and meet the requirement of clamping force; combining the locking handle 43 with the locking nut 41 through spline teeth according to a specified initial angle; and (3) clamping the limiting clamp spring 44 into a clamp spring groove of the locking nut 41 to limit the position of the locking handle 43, and completing the installation of the adjustable locking mechanism. When the steering column locking device is used, the locking nut 41 rotates clockwise on the positioning bolt 23 along the thread, the sliding block 42 is pressed tightly, and the sliding block 42 clamps the lower sleeve 31 of the lower steering column assembly, so that the purpose of locking the steering column is achieved; when the locking is required to be released, the locking handle 43 is rotated anticlockwise, the locking handle 43 drives the locking nut 41 to rotate anticlockwise along the thread through the spline teeth, the pressing force applied to the sliding block 42 by the locking nut 41 disappears, and the locking of the steering column can be released.

In another embodiment of the present invention, the positioning bolts and the sliding grooves are symmetrically disposed to be two sets, and the corresponding locking devices are also disposed to be two sets.

When an operator needs to adjust the vertical height of the steering wheel 1, the locking device 4 is firstly loosened to enable the upper sleeve 21 and the lower sleeve 31 to relatively slide, then the steering wheel 1 moves up and down to reach an ideal height, and then the locking device 4 is locked, at the moment, the upper sleeve 21 and the lower sleeve 31 cannot relatively slide due to the existence of friction force, so that the vertical adjustable function is realized. The utility model discloses the mechanism is simple, and it is convenient to adjust, and locking effect is good, can easily realize the function of 1 position adjustable of steering wheel, can satisfy various customers' demand.

The upper end steering tube assembly 2 is further connected with a crushing mechanism 5 and a guide mechanism 6, and the crushing mechanism 5 comprises a locking block 51 fixedly arranged on the forklift body and an upper mounting bracket 52 fixedly connected with the upper end steering tube assembly 2 as shown in fig. 6. The locking block 51 is provided with a mounting hole 54 which is oblong in order to allow fine adjustment of the position during mounting. Locking piece 51 joint is on last installing support 52, and locking piece 51 is fixed mutually through the conquassation piece with last installing support 52, is equipped with the recess on the locking piece 51, is equipped with the arch on going up installing support 52, and the two cooperatees, can realize the relative motion between locking piece 51 and last installing support 52. The two locking blocks 51 are respectively arranged on two sides of the upper sleeve 21 of the upper end steering tube assembly 2, and each locking block 51 is provided with two holes for installing the crushing pieces, so that the purpose of setting is to provide enough supporting force for a steering column system and break the crushing pieces in time after receiving impact force. In the preferred embodiment, the crushers are rivets to facilitate the relative fixing between the locking block 51 and the upper mounting bracket 52, the rivets are made of special metal or other materials which can be broken under a certain shearing force, the holes for mounting the crushers are rivet holes 53, and the relative fixing between the locking block 51 and the upper mounting bracket 52 is realized through the rivets and the rivet holes 53.

As shown in fig. 7, the guide mechanism 6 includes a guide bracket 61 fixed to the upper sleeve 21 of the upper-end steering pipe assembly 2, and a guide member fixedly attached to the body of the forklift, and the guide member is movable along a track set by the guide bracket 61. The guide support 61 is U-shaped, the two wings of the guide support 61 are provided with oblong guide holes 65, the guide piece can be slidably mounted in the guide holes 65, the guide piece fixedly connected with the vehicle body penetrates through the guide holes 65, when the crushing mechanism 5 of the upper-end steering tube assembly 2 is damaged and the upper-end steering tube assembly 2 is separated from the vehicle body constraint, the guide support 61 and the guide piece move relatively, the guide support 61 drives the steering column to move relatively with the vehicle body, and then the crushing movement of the steering column is realized. The guide mechanism 6 further comprises a connecting support 62 and a fixing support 63, the fixing support 63 is fixedly connected to the forklift body through bolts, the connecting support 62 is fixedly connected with the fixing support 63 through bolts, and the guide piece is fixedly arranged on the connecting support 62. Preferably, the guide member is a pin 64, the pin 64 can be easily inserted into the guide hole 65, has high strength, can support the steering column well, and is installed conveniently, and the pin 64 is fixedly disposed on the connection bracket 62. In the driving process, the fixed support 63 and the connecting support 62 do not move relatively, so that the installation is convenient and the structure is compact. Through the connection of the pin 64, the connecting bracket 62 and the guide bracket 61 can move relatively, and the movement track is along the direction of the guide hole 65. The structure of the guide bracket 61 not only enables the guide mechanism to be compact, but also provides sufficient supporting force for the steering column.

The utility model discloses a set up conquassation mechanism and guiding mechanism, when having realized human and steering wheel emergence striking, the motion of collapsing of steering column system accessible promptly, the steering column system breaks away from former mounted position, drives human slant application one end distance down, plays the buffer part impact, and then reduces or avoids the injury that causes the driver, improves driving safety.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims

1. The adjustable steering column of the forklift is characterized by comprising an upper steering tube assembly and a lower steering tube assembly, wherein the input end of the upper steering tube assembly is connected with the steering wheel, the output end of the lower steering tube assembly is connected with the steering gear, and the output end of the upper steering tube assembly is movably connected with the lower steering tube assembly; wherein the content of the first and second substances,

the locking device is arranged at the joint of the output end of the upper steering tube assembly and the lower steering tube assembly and used for limiting the relative sliding of the upper steering tube assembly and the lower steering tube assembly, the positioning bolt extends out of the upper steering tube assembly towards the side face, the locking device comprises a locking nut, a sliding block and a locking handle, the locking nut is sleeved on the positioning bolt and is in threaded connection with the positioning bolt, the sliding block is sleeved on the positioning bolt and is matched with the positioning bolt to clamp the lower steering tube assembly, the locking handle is sleeved on the locking nut and is used for controlling the locking nut to rotate, the lower steering tube assembly is provided with a sliding groove for embedding the sliding block and the positioning bolt, and the sliding block;

the upper end steering tube assembly is also connected with a crushing mechanism and a guide mechanism, the crushing mechanism comprises a locking block fixedly arranged on a forklift body and an upper mounting bracket fixedly connected with the upper end steering tube assembly, the locking block is clamped on the upper mounting bracket, the locking block and the upper mounting bracket are fixed through a crushing piece, the guide mechanism comprises a guide bracket fixed on the upper end steering tube assembly and a guide piece fixedly connected on the forklift body, and the guide piece can move along a track set by the guide bracket.

2. The adjustable steering column for forklifts of claim 1, wherein the upper steering tube assembly comprises an upper sleeve, an upper rotating shaft coaxially mounted in the upper sleeve through a bearing, wherein the output end of the upper rotating shaft is hollow and provided with an internal spline; the lower steering tube assembly comprises a lower sleeve and a lower rotating shaft coaxially arranged in the lower sleeve through a bearing, wherein an external spline is formed on the outer circumferential surface of the lower rotating shaft; an upper sleeve at the output end of the upper steering tube assembly coaxially extends into an annular gap between the lower sleeve and the lower rotating shaft, and the external spline and the internal spline are matched with each other.

3. The adjustable steering column for forklifts of claim 1, wherein the lock nut and the lock handle are in splined connection, the lock nut is provided with external spline teeth, and the lock handle is provided with internal spline teeth.

4. The forklift adjustable steering column according to claim 1, wherein the lock nut is provided with a limit snap spring for axially limiting the lock handle.

5. The adjustable steering column for forklifts of claim 1, wherein the two sides of the slider are each provided with a boss that fits into the slide slot.

6. The adjustable forklift steering column of claim 1, wherein there are two lock blocks, and each lock block has two holes for receiving crushing members.

7. The adjustable steering column for forklifts as claimed in claim 1, wherein the guide mechanism further comprises a connecting bracket and a fixing bracket, the fixing bracket is fixedly connected to the forklift body through a bolt, the connecting bracket is fixedly connected to the fixing bracket, and the guide member is fixedly disposed on the connecting bracket.

8. The forklift adjustable steering column according to claim 1, wherein the guide bracket is U-shaped, and both wings of the guide bracket are provided with oblong guide holes, and the guide member is slidably mounted in the guide holes.

9. The forklift adjustable steering column of claim 1, wherein the crushing member is a rivet.

10. The forklift adjustable steering column of claim 1, wherein the guide is a pin.