CN210734411U - Middle steering wheel type steering mechanism of tricycle - Google Patents
Middle steering wheel type steering mechanism of tricycle Download PDFInfo
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- CN210734411U CN210734411U CN201921516890.6U CN201921516890U CN210734411U CN 210734411 U CN210734411 U CN 210734411U CN 201921516890 U CN201921516890 U CN 201921516890U CN 210734411 U CN210734411 U CN 210734411U
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Abstract
The utility model provides a put steering wheel formula steering mechanism in tricycle belongs to the technical field of tricycle accessory. The technical scheme is as follows: the steering column assembly comprises an upper end and a lower end, the upper end is fixedly connected with the steering wheel, the lower end is connected to the upper portion of the front fork assembly through the steering device assembly, the steering device assembly comprises a steering device input shaft and a steering device, the steering device assembly further comprises a steering connecting rod and a steering rocker arm, one end of the steering connecting rod is connected with the steering device through a spherical hinge, the other end of the steering connecting rod is connected with the steering rocker arm through a spherical hinge, and the steering rocker arm is fixedly connected with the upper portion of the front fork assembly. The utility model has the advantages that: the steering gear rack translation displacement drives the steering rocker arm and the front fork to rotate through the ball head connecting rod to realize the steering of the wheels, so the stroke of the steering gear rack can be approximately equal to the chord length of a circular arc generated in the rotating process of the rocker arm, the stroke of the steering gear rack is short, the number of rotating turns of a steering wheel is small, and the turning diameter is small.
Description
Technical Field
The utility model relates to a technical field of tricycle accessory especially relates to a put steering wheel formula steering mechanism in tricycle.
Background
In the current market, most of the steering control modes of tricycles adopt a steering handle type, when the tricycle is driven by the steering handle type, people directly rotate a front wheel in a vertical plane through a handle to enable the advancing direction of a vehicle to meet the requirements of a driver, at the moment, the rotating angle of the front wheel and the rotating angle of the handle are 1:1, and the driving mode has the defects that the stability of the vehicle is deteriorated and the tricycle is easy to turn on one side when the tricycle is steered.
Based on the defects of a steering handle type, in the current market, the steering control mode of a small part of high-end tricycles adopts a steering wheel type, and when the steering wheel type is driven, people use a disc-shaped steering wheel to indirectly rotate a front wheel through a gear rack system, so that the advancing direction of a vehicle meets the requirements of a driver; because the rotation angle of the front wheel is indirectly controlled, the rotation angle of the steering wheel and the rotation angle of the front wheel are 1: n ", so the stability of the vehicle is strong when the vehicle is turning.
The application number is 201621419342.8, the publication date is 2017, 8.18, and the Chinese utility model named "a compact leading steering mechanism and its frame" discloses that "the steering transmission component includes gear, rack, mounting and two fixed axles, two fixed axles and rack fixed connection for with rotating joint fixed connection" can know through the description that the fixed axle is with rotating joint fixed connection, this kind of design method has following defect, the steering gear assembly is connected with the automobile body through two mounting points, adopt this kind of structure to turn to, steering gear rack stroke is long, the steering wheel rotates the number of turns many, turning radius is big.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that exists, the utility model provides a steering wheel steering mechanism is put to steering gear and automobile body three point connection's tricycle has overcome steering gear rack stroke length, and the steering wheel rotates the many and half big drawback of turning of number of turns.
The utility model discloses a realize through following measure: the utility model provides a put steering wheel formula steering mechanism in tricycle, includes steering wheel, steering column assembly, steering gear assembly and front fork assembly, the steering column assembly includes upper end and lower extreme, upper end fixed connection the steering wheel, the lower extreme passes through the steering gear assembly is connected the upper portion of front fork assembly, the steering gear assembly includes steering gear input shaft and steering gear, its characterized in that, the steering gear assembly still includes steering connecting rod and steering rocker arm, steering connecting rod one end with the steering gear ball joint is connected, the other end with the steering rocker arm ball joint is connected, steering rocker arm with the upper portion fixed connection of front fork assembly.
Preferably, the steering rocker arm is V-shaped and comprises a left side bending part, a right side bending part and a middle combining part, the left side bending part and the end part of the right side bending part are provided with through holes A, and the middle combining part is provided with connecting holes.
Preferably, the steering connecting rod comprises a left end portion and a right end portion, the left end portion is provided with a left end connecting rod ball head, and the right end portion is provided with a right end connecting rod ball head.
Preferably, the left end link ball is connected to one end of a tie rod of the steering gear, and the right end link ball is connected to the connecting hole of the middle joint portion.
Preferably, the front fork assembly comprises a front fork upper vertical shaft, a front fork connecting rod and a front fork shock absorber, the front fork upper vertical shaft is fixedly connected with the front fork connecting rod, the front fork shock absorber is arranged at two ends of the front fork connecting rod, threaded holes corresponding to the through holes A are formed in two sides of the end face of the front fork connecting rod, and bolts are arranged in the through holes A and the threaded holes.
Preferably, the steering column assembly comprises an upper steering shaft, an upper vertical pipe, an upper universal joint, a lower steering shaft and a lower universal joint, the upper vertical pipe is fixedly sleeved on the upper steering shaft and fixedly connected with the frame, the upper end of the upper steering shaft is fixedly connected with the steering wheel, the lower end of the upper steering shaft is connected with the upper end of the lower steering shaft through the upper universal joint, and the lower end of the lower steering shaft is connected with the input shaft of the steering gear through the lower universal joint.
The utility model has the advantages that:
1. the steering mechanism of the utility model combines the steering column assembly and the rack and pinion steering gear, and has compact structure and convenient arrangement;
2. the steering gear rack translation displacement drives the steering rocker arm and the front fork to rotate through the ball head connecting rod to realize the steering of the wheels, so that the stroke of the steering gear rack can be approximately equal to the chord length of a circular arc generated in the rotating process of the rocker arm.
3. The rotating circle number of the steering wheel in the utility model is less than that of the steering wheel of the tricycle in the prior art, and the steering wheel can be used by people of different ages, especially aged people;
4. from steering column to steering gear input shaft, form by two universal joint concatenations, because the existence of space contained angle between each axis, the transmission of steering column will have undulantly, the utility model discloses a moment is undulantly little.
5. When the steering torque applied by a driver or accidentally disappears, a part of the turning torque is used for overcoming the friction force of a steering system, and the remaining part of the returning torque enables the steering wheel to return to the original central position, so that the stable straight running of the vehicle is ensured.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a schematic structural view of the steering gear assembly and the front fork assembly.
Fig. 3 is a schematic structural view of the steering column assembly of the present invention.
Fig. 4 is a schematic structural view of the middle steering link of the present invention.
FIG. 5 is a schematic view of the structure between the steering linkage, the pitman arm, and the front fork assembly.
Fig. 6 is a schematic view of the construction of a steering rocker arm.
Wherein the reference numerals are: 1. a steering wheel; 2. a steering column assembly; 21. an upper steering shaft; 22. an upper vertical pipe; 23. an upper gimbal; 24. a lower steering shaft; 25. a lower gimbal; 3. a diverter assembly; 31. a steering gear input shaft; 32. a diverter; 33. a steering link; 331. the left end is connected with a ball head; 332. the right end is connected with a ball head; 34. a steering rocker arm; 341. a left side bent part; 342. a right side bent part; 343. an intermediate bonding portion; 4. a front fork assembly; 41. the front fork is provided with an upper vertical shaft; 42. a front fork connecting rod; 43. and damping the front fork.
Detailed Description
In order to clearly illustrate the technical features of the present solution, the present solution is explained below by way of specific embodiments.
As shown in figure 1: an object of the utility model is to provide a put steering wheel formula steering mechanism in tricycle, this steering mechanism adopt the mode that steering column assembly 2 and rack and pinion's steering gear 3 and front fork assembly 4 combine, its compact structure arranges the convenience.
The utility model relates to a put steering wheel formula steering mechanism in tricycle, including steering wheel 1, steering column assembly 2, steering gear assembly 3 and front fork assembly 4, steering column assembly 2 includes upper end and lower extreme, upper end fixed connection steering wheel 1, the lower extreme passes through steering gear assembly 3 and connects the upper portion at front fork assembly 4, steering gear assembly 3 includes steering gear input shaft 31 and steering gear 32, steering gear assembly 3 still includes steering connecting rod 33 and steering rocker 34, steering connecting rod 33 one end is connected with steering gear 32 ball joint, the other end with turn to the 34 ball joint of rocker and be connected, the upper portion fixed connection of steering rocker 34 and front fork assembly 4.
The utility model discloses a put steering wheel formula steering mechanism in tricycle can transmit the steering command of steering wheel to preceding tire through this steering mechanism, realizes whole car and turns to the function.
As shown in fig. 2, 4 and 6: the steering rocker arm 34 is V-shaped and includes a left side bending portion 341, a right side bending portion 342, and a middle connecting portion 343, the ends of the left side bending portion 341 and the right side bending portion 342 are provided with through holes a, and the middle connecting portion 343 is provided with connecting holes.
The steering link 33 includes a left end portion provided with a left-end link ball 331 and a right end portion provided with a right-end link ball 332.
The left end link ball 331 is connected to one end of the tie rod of the steering gear 32, and the right end link ball 332 is connected to a connecting hole of the middle joint 343.
As shown in fig. 5: the front fork assembly 4 comprises a front fork upper vertical shaft 41, a front fork connecting rod 42 and a front fork shock absorption 43, the front fork upper vertical shaft 41 is fixedly connected with the front fork connecting rod 42, the front fork shock absorption 43 is arranged at two ends of the front fork connecting rod 42, threaded holes corresponding to the through holes A are formed in two sides of the end surface of the front fork connecting rod 42, and bolts are arranged in the through holes A and the threaded holes.
As shown in fig. 3: the steering column assembly 2 comprises an upper steering shaft 21, an upper vertical pipe 22, an upper universal joint 23, a lower steering shaft 24 and a lower universal joint 25, wherein the upper vertical pipe 22 is fixedly sleeved on the upper steering shaft 21 and fixedly connected with a frame, the upper end of the upper steering shaft 21 is fixedly connected with a steering wheel 1, the lower end of the upper steering shaft is connected with the upper end of the lower steering shaft 24 through the upper universal joint 23, and the lower end of the lower steering shaft 24 is connected with a steering gear input shaft 31 through the lower universal joint 25.
Use the parameter that provides in table 1 as the standard, introduce from the steering gear rack stroke of tricycle, the total number of turns of steering wheel, in the aspect of minimum turn diameter the utility model discloses a design principle:
steering gear rack travel: the steering system is used for arranging the rack of the steering gear to translate and displace, and the steering rocker arm and the front fork are driven by the steering connecting rod to rotate so as to realize the steering of the wheels. The steering gear rack travel can therefore be approximately equal to the chord length of the arc generated during rotation of the rocker arm
Lc＝2·Ly·sinα
In the formula: l iscThe distance in mm for the travel of the steering rack,Lycalculated for the length of the steering rocker arm, 100mm, α being the maximum rotation angle of the front fork of 33 degreesc＝108.93mm。
Total number of turns of steering wheel: the formula of the number of turns of the steering wheel of the rack and pinion steering gear is as follows:
in the formula: l isc108.93mm for the steering rack assembly travel; i is the steering gear ratio (i.e., the travel of the rack during one turn of the steering wheel), 39.94; calculating to obtain: n is 2.73, and the total number of turns of rotating of general wheel is within 4 circles, considers the use crowd of tricycle ageing partially simultaneously, and the steering wheel number of turns is difficult too much, so the number of turns of rotating of this motorcycle type accords with the designing requirement.
Minimum turning radius: the smaller the turning radius, the smaller the field required for the vehicle to turn, and the better the maneuverability of the vehicle.
Firstly, the actual rotation angle theta of the wheel when the wheel is turned to the limit is calculated
tanθ＝tanα·cosβ
Wherein α is the maximum rotation angle of the front fork, α -33 deg. β is the front extending angle, β -22 deg. is calculated by substituting the above data into the formulamax＝31.05°
Secondly, respectively calculating the front wheel turning radius RfAnd rear wheel turning radius Rr
In the formula: l is the wheelbase of the whole vehicle, 1900mmrTo the rear track, LrAnd (3) substituting the data into the above formula to calculate, wherein t is 1140mm, t is the reach, and t is 30.36 mm: rf＝3.71m；Rr3.75mm here the larger value RrAs the turning radius of the vehicle.Therefore, the minimum turning diameter D is obtained by the above theoretical calculationmin＝2·Rr7.5 m. In order to ensure the high maneuverability of the automobile, the turning radius value of the outer wheel is smaller than 2.5 times of the wheel base of the automobile when the left and right steering wheels are in the maximum turning angle. 1900mm for L, 4.75m for 2.5L, Rr＝3.75m<4.75m, so that the vehicle meets the turning requirement.
For example, as shown in table 1, table 1 is a main parameter value of the steering system in the embodiment of the present invention.
The technical features that the utility model has not been described can be realized through or adopt prior art, and no longer give unnecessary details here, and of course, the above-mentioned explanation is not right the utility model discloses a restriction, the utility model discloses also not only be limited to the above-mentioned example, ordinary skilled person in this technical field is in the utility model discloses a change, modification, interpolation or replacement made in the essential scope also should belong to the utility model discloses a protection scope.
Claims (6)
1. A middle steering wheel type steering mechanism of a tricycle comprises a steering wheel (1), a steering column assembly (2), a steering gear assembly (3) and a front fork assembly (4), the steering column assembly (2) comprises an upper end and a lower end, the upper end is fixedly connected with the steering wheel (1), the lower end is connected to the upper part of the front fork assembly (4) through the steering gear assembly (3), the steering gear assembly (3) comprises a steering gear input shaft (31) and a steering gear (32), characterized in that the steering gear assembly (3) further comprises a steering connecting rod (33) and a steering rocker arm (34), one end of the steering connecting rod (33) is connected with the steering gear (32) in a spherical hinge mode, the other end of the steering connecting rod is connected with the steering rocker arm (34) in a spherical hinge mode, the steering rocker arm (34) is fixedly connected with the upper part of the front fork assembly (4).
2. The mid steering wheel type steering mechanism of a tricycle according to claim 1, wherein the steering rocker (34) is V-shaped and comprises a left side bent portion (341), a right side bent portion (342) and an intermediate connecting portion (343), wherein the ends of the left side bent portion (341) and the right side bent portion (342) are provided with through holes a, and the intermediate connecting portion (343) is provided with a connecting hole.
3. Mid-steering wheel steering mechanism for a tricycle according to claim 2, characterized in that the steering link (33) comprises a left end provided with a left end link bulb (331) and a right end provided with a right end link bulb (332).
4. The mid-steering wheel steering mechanism of a tricycle according to claim 3, characterized in that the left end link bulb (331) is connected with one end of a tie rod of the steering gear (32), and the right end link bulb (332) is connected with the connecting hole of the middle joint part (343).
5. The mid-steering wheel type steering mechanism of the tricycle according to claim 4, wherein the front fork assembly (4) comprises a front fork upper vertical shaft (41), a front fork connecting rod (42) and a front fork shock absorber (43), the front fork connecting rod (42) is fixedly connected to the front fork upper vertical shaft (41), the front fork shock absorber (43) is arranged at two ends of the front fork connecting rod (42), threaded holes corresponding to the through holes A are arranged at two sides of the end surface of the front fork connecting rod (42), and bolts are arranged in the through holes A and the threaded holes.
6. The mid-steering wheel type steering mechanism of the tricycle according to claim 1, wherein the steering column assembly (2) comprises an upper steering shaft (21), an upper vertical pipe (22), an upper universal joint (23), a lower steering shaft (24) and a lower universal joint (25), the upper vertical pipe (22) is fixedly sleeved on the upper steering shaft (21) and is fixedly connected with the frame, the upper end of the upper steering shaft (21) is fixedly connected with the steering wheel (1), the lower end of the upper steering shaft is connected with the upper end of the lower steering shaft (24) through the upper universal joint (23), and the lower end of the lower steering shaft (24) is connected with the steering input shaft (31) through the lower universal joint (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921516890.6U CN210734411U (en) | 2019-09-12 | 2019-09-12 | Middle steering wheel type steering mechanism of tricycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921516890.6U CN210734411U (en) | 2019-09-12 | 2019-09-12 | Middle steering wheel type steering mechanism of tricycle |
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| Publication Number | Publication Date |
|---|---|
| CN210734411U true CN210734411U (en) | 2020-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921516890.6U Expired - Fee Related CN210734411U (en) | 2019-09-12 | 2019-09-12 | Middle steering wheel type steering mechanism of tricycle |
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| CN (1) | CN210734411U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111703497A (en) * | 2020-07-17 | 2020-09-25 | 浙江工业大学 | Steering structure based on disc type electric tricycle |
-
2019
- 2019-09-12 CN CN201921516890.6U patent/CN210734411U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111703497A (en) * | 2020-07-17 | 2020-09-25 | 浙江工业大学 | Steering structure based on disc type electric tricycle |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200612 |