JPH09156565A - Acceleration lever structure of electric cart - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an acceleration lever structure of an electric cart which can link an acceleration lever with an oscillation amount detection means which can detect an oscillation amount of the acceleration lever by using a simple structure. SOLUTION: An acceleration lever 13 which can be operated by an accelerator by a grip operation together with a handle grip 12 of an operation handle 1 is connected with a turn shaft 17a for input of an oscillation amount detection means 17 which supports the acceleration lever 13 around a horizontal shaft core X in such a manner that it can oscillate and detects an oscillation amount of the acceleration lever 13 and a basic end part of the acceleration lever 13 in the interlocking relationship through a flexible joint 16 which transmits only torque around the horizontal shaft core X.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an accelerator lever structure of an electric cart equipped with an accelerator lever that can be operated by a grip operation together with a handle grip of a steering handle so as to be swingable around a horizontal axis. .

[0002]

2. Description of the Related Art Conventionally, as an accelerator lever structure of this type of electric cart, as disclosed in, for example, Japanese Patent Application Laid-Open No. 7-100611, an accelerator lever is provided in a console box or the like of a steering handle around a horizontal axis. The swing operation is supported and the swing operation amount of the accelerator lever is detected using an angle detector such as a potentiometer via a link mechanism linked to the accelerator lever.

[0003]

However, in the conventional device, the accelerator lever and the accelerator lever swing amount detecting means utilizing an angle detector such as a potentiometer are linked through a link mechanism or the like. , The link mechanism etc. must be assembled with high precision,
There was a problem that the number of parts was large and the structure became complicated.

The present invention has been made in view of the above circumstances, and is an accelerator for an electric cart in which an accelerator lever and a swing amount detecting means capable of detecting the swing amount of the accelerator lever can be linked with a simple structure. The purpose is to provide a lever structure.

[0005]

[Means for Solving the Problems]

(Structure) An accelerator lever structure of an electric cart according to claim 1 of the present invention is provided with an accelerator lever that can be operated by a grip operation of a steering handle together with a handle grip so as to be swingable around a horizontal axis. In the accelerator lever structure of the electric cart, the input rotation shaft of the swing amount detecting means for detecting the swing amount of the accelerator lever and the base end portion of the accelerator lever are connected to each other about the torque about the horizontal axis. It is characterized in that they are interlockingly connected through a flexible joint that transmits only the above.

(Operation) According to the structure of claim 1 of the present invention, the base end portion of the accelerator lever and the input rotating shaft of the swing amount detecting means are swung by the accelerator lever via a flexible joint. Since the torque transmission is possible around the horizontal axis as the axis, the swing axis center position of the accelerator lever and the rotation axis center position of the input rotation shaft of the swing amount detecting means are accurately set. Even if they do not coincide with each other, that is, even when they are assembled in an approximate position setting, the torque transmission due to the swing of the accelerator lever can be satisfactorily transmitted to the input rotation shaft.

(Effect) Therefore, according to the structure of claim 1 of the present invention, it is time-consuming to assemble the accelerator lever and the input rotation shaft of the swing amount detecting means in a freely rotatable manner. It is not necessary to perform well, and since the linkage between the accelerator lever and the input rotation shaft of the swing amount detecting means does not need to use a mechanical linkage mechanism having a large number of parts such as a link mechanism, The attachment work can be done easily and it does not take time and labor, and the work efficiency can be improved. Also, the number of parts is small, the structure is simple and the structure can be made compact, and the manufacturing cost can be reduced by the above. .

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an example of an electric cart. This electric cart has a vehicle body frame 5 supported by a front wheel 2 which is a single wheel steered by a steering wheel 1 and a pair of left and right rear wheels 4 and 4 which are driven by an electric motor 3.
And is equipped with a passenger seat 6, a battery 7, a control device 8 and the like.

As shown in FIGS. 1 and 2, a console box 10 is provided at the upper end of a handle shaft 9 for integrally supporting the front wheels 2, and the left and right side parts of the console box 10 are provided. The pair of left and right handle rods 11, 11 formed in a U shape in a plan view are provided so as to project, and the steering handle 1 is configured. And
Handle grips 12 and 12 are provided at end portions where the pair of left and right handle rods 11 and 11 face each other. An accelerator lever 13 is provided so that it can be operated together with the right handle grip 12. More specifically, the accelerator lever 13 is pivotally attached at its base end to a support boss 14 made of synthetic resin integrally provided on the right side wall of the console box 10 in a protruding state. That is, the inner surface portion of the communication hole 15 formed along the left-right direction so as to communicate with the inside and the outside of the support boss body 14 and the communication hole 15
The flexible joint 1
No. 6, the mounting boss 16A for mounting the shaft portion 13a of the accelerator lever 13 and the mounting boss 16B for mounting the input rotation shaft 17a of the potentiometer 17 described later are rotatably supported. The shaft portion 13a is integrally fitted in the mounting boss 16A. on the other hand,
The potentiometer 17 as a swing amount detecting means is disposed inside the projecting portion of the support boss 14 in the console box 10, and the input rotary shaft 17a of the potentiometer 17 is substantially aligned with the horizontal axis X. The input rotation shaft 17a is rotatably provided around an axial center along the axis, and is integrally fitted into the mounting boss 16B of the flexible joint 16. Then, as shown in FIG. 2, both mounting bosses 16A and 16B are connected by a spring joint 16C so that the rotational torque of the mounting boss 16A is transmitted to the mounting boss 16B. This spring joint 16C is attached to the mounting boss 16
Even if the rotation shaft core positions of A and 16B are slightly deviated from each other, the rotation torque of the mounting boss 16A is equal to that of the mounting boss 16B.
However, it is transmitted with a very small amount of attenuation and the like, and can be deformed relatively easily with respect to misalignment.

Therefore, the swing amount of the accelerator lever 13 is
The electric motor 3 is drive-controlled based on the detection information by the control device 8 which is detected by the potentiometer 17 through the flexible joint 16 in a substantially direct connection state and the detection information of the potentiometer 17 is input. Even if the potentiometer 17 is not accurately attached to the console box 10 or the support boss 14,
The misalignment of the input rotation shaft 17a of the accelerator lever 13 and the potentiometer 17 is absorbed by the flexible joint 16 so that the rotation torque is satisfactorily transmitted. In addition, the flexible joint 16, the potentiometer 17, and the accelerator lever 13 are attached to the support boss 14 in advance, and the support boss 14 is attached to the console box 1
It can be assembled to 0, which makes the assembly work extremely simple and quick. Furthermore, this support boss 1
4, the accelerator lever 13 may be provided on the left side of the console box 10 for a left-handed person, and the support boss 14 and the like may not be fixed to the console box 10 but may be left-right interchangeable. .

Next, a structure for adjusting and adjusting the posture of the steering wheel 1 with respect to the passenger seat 6 will be briefly described. As shown in FIGS. 1 and 3A and 3B, the lower end of the handle shaft 9 of the steering handle 1, that is, the pivotal support for the fork member 18 for pivotally supporting the front wheel 2 is , Is pivotally supported around a horizontal axis X2. With respect to the fork member 8, the handle shaft 9 composed of a square bar member is moved by the ball detent mechanism 19 to the horizontal axis X.
It can be held lightly with an appropriate swing angle around 2. That is, the recess 2 into which the ball 21 elastically biased toward the fork member 8 by the spring 20 provided on the handle shaft 9 is removably engaged with the fork member 8.
.. are formed at a plurality of positions around X2 at appropriate intervals (three positions in FIG. 3B). Then, the bolt 23 for fixing the handle shaft 9 which is set in a predetermined posture by the ball detent mechanism 19 to the fork member 8 can be fastened and moved along the horizontal axis X2.
The handle shaft 9 is screwed onto the fork member 8 through the through hole 24. Thus, the rearward inclination angle of the handle shaft 9 can be easily changed by performing the fastening and unfastening work of the bolt 23 and the posture setting work by the ball detent mechanism 19. Further, the handle shaft 9 and the fork member 18, which is rotatably supported by the machine body frame 5 at the time of steering, are not firmly fastened and fixed, but are relatively lightly linked to each other, and the handle shaft 9 is manually moved forward and backward. If the setting is made to permit displacement operation, the steering wheel 1 can be held in a proper posture while being held in position by the ball detent mechanism 19 during steering, but the steering wheel 1 does not get in the way when the operator gets on and off. The posture of the steering handle 1 can be manually changed forward against the holding force of the ball detent mechanism 19 or the like.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the accompanying drawings.

[Brief description of the drawings]

FIG. 1 is an overall side view showing an electric cart

FIG. 2 is a partially cutaway plan view showing a steering handle.

FIG. 3 is a partially cutaway rear view (a) and an enlarged side view (b) showing a structure capable of changing the attitude of the steering wheel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Steering handle 12 Handle grip 13 Accelerator lever 16 Flexible joint 17 Swing amount detection means 17a Rotating shaft for input X Horizontal axis

Claims (1)

[Claims] 1. An electric motor equipped with a handle grip (12) of a steering handle (1) and an accelerator lever (13) that can be operated by squeezing together with the handle grip (12) so as to be swingable around a horizontal axis (X). An accelerator lever structure for a cart, comprising an input rotation shaft (17a) of a swing amount detecting means (17) for detecting a swing amount of the accelerator lever (13), and a base end portion of the accelerator lever (13). The horizontal axis (X)
Flexible joint that only transmits torque around (16)
Accelerator lever structure of an electric cart that is interlockingly connected via.