JPS63125472A - Clutch and brake controller for electric system hand type cart - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a single-axis type (so-called cat cart) hand-held cart, and in particular, an electric hand-held cart that can be used when climbing or descending stairs. This relates to the WR that controls the clutch and brake of the vehicle.

(Conventional technology) Climbing and descending stairs with objects on a single-axis electric hand-pushed cart requires considerable attention from the operator. When doing this, it is desirable to appropriately control the clutch and brake as necessary, but there is currently no solution to this problem.

(Problem to be Solved by the Invention) However, when carrying objects on the single-axis handcart and climbing or descending stairs, it is necessary to use a brake to control the speed and prevent falling, especially during transportation up the stairs. is desirable, but
None of the above methods are easy to implement, and are complex and expensive.

In addition, this type of hand cart does not use a clutch that can be easily disengaged, so if it is pushed down due to the resistance of the motor, it is difficult to operate the cart when pulling it up, and it is difficult to drive on a flat road. Workers often have a hard time.

This invention aims to solve the above problems.

(Means and effects for solving the problem) The present invention has been made in view of the above problem, and is an electric hand-push cart used for transporting heavy objects along stairs. Clutch 0N near the top grip
- A first lever capable of OFF operation and brake operation and a second lever capable of operating only the brake alone are provided, and each of these levers is connected to a clutch and a brake, respectively, via a combination link device. , the first half stroke of the first lever is 0N-OF of the clutch.
It is used for F operation, and in the second half of the stroke, the clutch is in the OFF state and the brake can be applied in combination, and the second lever allows the brake to be operated independently.The structure is simple and easy to operate, and the latch and brake control device is advantageous. It will be done.

(Example) Next, embodiments of the present invention will be described based on the drawings.

FIG. 1 shows an electric cart to which an embodiment of the present invention is applied, and in FIG. 1, l is a drive shaft for climbing and descending, and wheel holding frames 2 are attached to both ends of the drive shaft 1, respectively. A plurality of wheels 3 (four wheels on each side in the figure) of the same diameter are provided on the wheel holding frame 2 to which the wheels 3 are fixed and are arranged at equal distances from the drive shaft 1 and at equal angular intervals.

The drive shaft 1 is drivingly connected to an electric motor 5, which is supplied with power from a battery 4 through an electric circuit, via a reduction gear R6. Deceleration 8! Inside the i6.

A clutch and a brake (not shown) are built in, that is, there is a clutch mechanism in the middle of the reducer 6 that controls power transmission between the electric motor 5 and the drive shaft 1 on and off, and a clutch mechanism in the middle of the reducer 6 or the drive shaft. A brake mechanism is provided on the shaft 1 to brake the rotation of the shaft.

Additionally, on the top of the cart body 9, there is a grip 1 that holds the cart in its position when the cart climbs or descends stairs.
0, and a push button switch 11 is provided near the grip 10 to control the drive shaft l from ON to OFF, and a first lever 12 and a second lever 13 are provided to control the clutch and brake. ing.

The features of this embodiment are as follows.

That is, FIG. 2 is an exploded view schematically showing the main parts of the P section and the Q section (see FIG. 1). In FIG. 1, the first lever 12 has a locking mechanism ( (not shown), and is used to perform ON/OFF operations of the clutch.

14 is a lock release lever, and 15I is a lever holder. The first lever 12 is θ1+θ2 shown from ■ to ■ in the figure.
It is a spring that can rotate over a range of .

The range of θ1 shown in I-■, which is the first half of the stroke, is used for ON-OFF operation of only the clutch.

The range of θ2 in the second half strokes ■～■ is.

By interlocking with the combination link CL, which will be described later, the reflatch is in the OFF state and the brake is in the ON state.

Further, at the stroke end (2), as described above, the locking state of the clutch OFF and the brake ON can be maintained intermittently by the lever locking mechanism.

These points will be explained in more detail below. 1
61 is a cable, 17I is a cable fixing bracket, and cable 16. connects the first lever 12 to a clutch body (not shown) via a combination link CL and a clutch actuation link L.

Similarly, the second lever 13 is used to operate the brake alone, and is attached to the frame 9 by a lever holder 15g, and the cable 16□ connects the second lever 13 via the combination link CL and the brake actuation link Lz. Not connected to the brake body.

The configuration of the combination link CL is as shown in the exploded perspective view of the lever 181. Lever 18□ and lever 18
．． having a lever 18. A hollow cylindrical member is provided with a protruding piece 191 and a protruding piece 221, and the small holes in these protruding pieces allow the cable 161 to pass through the lever 18 to the first
Connect the lever 12 and the clutch actuation link L1.

The lever 18□ has a hollow cylindrical member with a plate member 19z and a protrusion 22z, and the lever 1B has a cylindrical member with a protrusion 22 and a protrusion 22z.
have. The connection between the second lever 13 and the brake actuation link L8 by the lever 183 means that the lever 1
81 is the same. 20 is a lever support pin, 21
．． and 21z indicates a pin support bracket, 23. is lever 18. The screw 23□ contacts the plate member 19□ so as to interlock the lever 18g and the lever 18g.
This is a screw that interlocks 88 and 18 levers.

The combination link CL then connects the lever support pin 20 to the support bracket 211. Lever 181° Lever 1
8□, lever 183. The interlocking screws 231 and 232 are inserted into holes provided in the support bracket 21g and are integrally formed by abutting the plate member 19g.

Now, when the first lever 12 is pushed down from the position I to the position ■, the clutch changes from the ON state to the OFF state, and this θ1
In the range of , the clutch OIJ is kept in the OFF state.

And in the range from ■ to ■, combination link CL
, actuate the cable in the direction of the solid arrow X to turn the clutch off, and at the same time tighten screw 23. The tip of the presses the plate member 19□, and the brake is turned on. Also the second
When lever 13 is pushed down in the Z direction, cable 16g moves as shown by arrow Z, and combinator 5 link CL
It is possible to operate the brake alone via the .

(Effect of the invention) This invention is constructed as described above in detail.

For ON-OFF operation of the clutch only, the first half stroke of the first lever is used, and the second half stroke can be used in combination with the combination link to control the brake while the clutch is OFF. Brake control is performed by a single operation.

And because the clutch and brake can be operated by operating the first lever, so-called one lever,
The clutch can be easily disengaged to disconnect the motor and shaft, making it easy to push down or pull up the cart, or lock the vehicle body and drive shaft to facilitate running on flat roads. .

Furthermore, since the brake can be easily operated independently by operating the second lever, it is extremely effective for speed control and fall prevention during transportation down stairs.

As described above, according to the present invention, since the interlocking mechanism between the clutch and the brake can be shared by the combination link, a highly practical control device with a simple structure and easy operation can be obtained.

[Brief explanation of the drawing]

FIG. 1 shows an outline of an electric hand cart to which the present invention is applied, and FIG. 2 schematically shows its main parts. 12...first lever, 13...second lever. 14...Lock release lever. 16. 16□...Cable. CL...Combination link. Ll...link for clutch operation. L2...Link for brake operation.

Claims (1)

[Claims] A first lever for operating the clutch and brake and a second lever for operating only the brake are provided near the grip on the top of the cart body, and the first lever is connected to the clutch and also to the brake via a combination link. and the second lever is connected to a brake via the combination link.