JPH0639749Y2 - Connecting device between crankshaft and connecting rod in foot-operated vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a connecting device between a crankshaft and a connecting rod in a foot-operated vehicle.

(Prior Art) Conventionally, in a foot-operated vehicle, a connecting device between a crankshaft and a connecting rod shown in FIGS. 7 and 8 is known.

Figure 7 is opened in an end portion of the connecting rod a _6, a crankshaft
a clearance hole 14 for inserting the a _7, a fixing plate 1 which is screwed to the end of the connecting rod a ₆ has a guide hole 15a through which the crankshaft a ₇
5 and 5 form a connecting device.

FIG. 8 shows a coupling device comprising a resin-made engaging member 16 into which an end portion of the connecting rod a ₆ is inserted, and a notch 16a for fitting a crankshaft a ₇ recessed from the lower surface of the engaging member 16. is doing.

(Problems to be Solved by the Invention) In the case of FIG. 7 in the above-mentioned prior art, the cumbersome work of passing the crankshaft a ₇ through the stupid hole 14 at the end of the connecting rod a ₆ and the guide hole 15a of the fixing plate 15 is avoided. This is necessary and, in addition to the screwing work, there is a problem that the assembly work is troublesome.

On the other hand, as shown in FIG. 8, when the traveling road surface is bumped or collides with stones or the like, the fitting notch 16a may be disengaged from the crankshaft a ₇ by the upward force.

The present invention has been made in view of the above conventional circumstances, and an object of the present invention is to provide a connecting device in which the crankshaft and the connecting rod can be connected with one touch and which is not disengaged by an external force. .

(Means for Solving the Problem) In order to solve the above-mentioned problems, the technical means taken is to connect the locking claws formed on either one side with the locking concave step portion by elastic locking. It consists of two half-split bodies, and the recesses formed in the corresponding surfaces of one or both half-split bodies constitute a support part for fitting the bent end of the connecting rod, and both half-split bodies are opened in opposite directions. It is characterized in that the cutout portion constitutes a through hole of the crankshaft.

(Operation) According to the above-mentioned technical means, both half halves are engaged with the locking claw so that the bent end of the connecting rod fits in the support portion with the crankshaft positioned in one notch portion. The bent end of the connecting rod is fitted and held in the support part by being fixed by elastic locking with the locking recessed step part, and the other notch part is the through hole of the crankshaft with the one notch part. Make up.

(Effects of the Invention) Since the present invention is configured as described above, the connecting rod and the crankshaft cannot be disengaged only by the simple work of elastically locking the locking claw and the locking recessed step portion. Can be firmly connected.

(Example) Next, the Example of this invention is described based on drawing.

In FIG. 1, A is a foot-operated vehicle and a frame
at both ends of the support rod a ₂ that is laterally placed in a _1, and rotatably supporting a front steering受腕a ₃ fitted with wheels 1,1 rotatably, the steering受腕
Connect the a ₃ to the handle a ₄ to rotate the handle a ₄ so that the front wheels 1, 1 can be tilted in any direction, and the pedal frame
Crankshaft a _{7 in} which the other ends of connecting rods a ₆ and a ₆ whose one ends are connected to a ₅ and a ₅ are mounted on frame a ₁ and rear wheels 2 and 2 are attached.
The other end is connected to the pedal frame a ₅ , a ₅
It has a well-known structure in which the rear wheels 2, 2 are transmitted by transmitting from a ₆ and a ₆ to the crankshaft a ₇ .

The other end of the connecting rod a ₆ and the crankshaft a ₇ are connected using a connecting device B.

This connecting device B is composed of two half halves b ₁ and b ₂ made of synthetic resin.

As shown in FIG. 5, _one half-divided body b ₁ has a notched portion 4 having an open upper surface, which is formed at a substantially central portion of a plate body 3 having a desired thickness, and portions on both sides of the notched portion 4 are formed. In addition, a locking piece 5 having a locking claw 5a at the tip is integrally formed to project, and a projection piece 6 having a receiving surface 6a having the same curvature as the arc surface 4a at the lower end of the cutout portion 4 is formed at the lower end of the cutout portion 4. The stopper 5 is formed integrally with the stopper 5 in the same direction.

As shown in FIG. 6, the other half-divided body b ₂ has a notched portion whose lower surface is opened to a portion corresponding to the notch 4 of the thick plate 7 having the same area as the _one half-divided body b _1. Notches 8 are formed, and engaging recessed step portions 9 are provided on both sides of the notch 8 in correspondence with the forming claws 5a, and at the upper end of the notch 8, an arc of the upper end of the notch 8 is formed. the projecting piece 10 having a receiving surface 10a of the surface 8a of the same curvature, protrude integrally formed, further, the support portion 11 for fitting the bent edge a ₆ 'of the connecting rod a ₆ and the other end is in recessed .

The support portion 11 is recessed in a front shape by utilizing the play surface portions between the projecting piece 10 and the upper surface of the half-divided body b ₂ and between the cutout portion 8 and the locking recessed step portion 9. A horizontal projecting piece 12 is integrally formed at the groove edge directly above the piece 10.

The locking claw 5a is formed by forming the tip of the locking piece 5 in an arrow shape.

The engaging recessed step portion 9,9 has a front side surface portion 9a which guides the inclined surface 5a 'of the engaging claw 5a by its elastic force when the projecting pieces 6,10 are fitted into the cutout portions 4,8, respectively. , One step lower and stepped outward, and locking claw 5a
Step surface 9b for locking the rising surface 5a ″ from the locking piece 5
Is connected to the rear side surface portion 9b having the front side surface portion 9a as a boundary.

Next, using the coupling device B of the present embodiment, the crankshaft
The order of connecting a ₇ and the connecting rod a ₆ will be described.

The crankshaft a ₇ is mounted on the frame a ₁ and is connected to the connecting rod.
a _6, a ₆ respectively of one end thereof is connected to the s pedal frame a _5, a ₅ husband, and the other end is in a free end.

In this state, the arc surface in the notch 4 of _one half-divided body b ₁
The crankshaft a ₇ is brought into contact with 4a and one half half b ₁
Position at a right angle to the crankshaft a ₇ .

Next, the crankshaft a ₇ is inserted into the cutout portion 8 of the other half-divided body b ₂ in which the bent end a ₆ ′ which is the other end of the connecting rod a ₆ is fitted in the support portion 11. Insert it from above, and make both halves b ₁ and b ₂ face each other.

After that, a holding force by a hand is applied to both half-divided bodies b ₁ and b ₂ so that the protruding pieces 6 and 10 fit into the cutout portions 4 and 8, respectively.

Then, the locking claw 5a enters the front side surface portion 9a of the locking recessed step portion 9 in a state of being elastically deformed inward, and the rear side surface portion 9a.
The half halves b ₁ and b ₂ are fixed to each other by being locked to the step surface 9b ′ of 9b.

As a result, the notches 4 and 8 form the through hole 13 of the crankshaft a ₇ , and the half body b ₁ on one side closes the lateral opening of the support 11.

The feature of this embodiment is that the two halves b ₁ and b ₂ can be securely fixed to each other by the guide function for the notches 4 and 8 of the protrusions 6 and 10, and that the two receiving surfaces 6 a and 10 a have the crankshaft a. ₇ through holes 13
The area is expanded and the crankshaft a ₇ when driving the rear wheels 2 and 2
To prevent local contact with and improve durability,
The inner surface of the horizontal projecting piece 12 and the upper surface of the projecting piece 10 function as a guide when the bent end a ₆ ′ is inserted into the support portion 11, and the fitting is simple and reliable.

[Brief description of drawings]

The drawings show an embodiment of a connecting device between a crankshaft and a connecting rod according to the present invention. FIG. 1 is a bottom view of a foot-operated vehicle in which the crankshaft and the connecting rod are connected, and FIG. FIG. 3 is a partial cutaway view showing a state in which a crankshaft and a connecting rod are connected by a connecting device, and FIG. 4 is a sectional view taken along line (4)-(4). Fig. 5, Fig. 5 and Fig. 6 are perspective views of the respective divided bodies, Fig. 7,
FIG. 8 is a sectional view of a conventional example. Naozu in B: coupling device, b _1, b _2: half pieces 5a: locking claw, 9: engaging recessed step a _6: connecting rod, a ₆ ': Orikyokutan a _7: crankshaft, 13 : Through hole A: Foot-operated vehicle

Claims (1)

[Scope of utility model registration request] 1. A two-half split body that is coupled by elastic engagement between a locking claw formed on either side and a locking recessed step portion,
A supporting portion for fitting the bent end of the connecting rod is constituted by a recessed portion formed on one or both corresponding surfaces of the half-divided body, and both half-divided bodies each have a notch opened in the opposite direction to penetrate the crankshaft. A connecting device for connecting a crankshaft and a connecting rod in a foot-operated vehicle, characterized in that it has a hole.