JPH0110310Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a brake structure that also serves as a steering clutch for a power working machine.

In this invention, when the steering clutch is operated, the brakes on either the left or right traveling section are simultaneously activated, ensuring reliable steering operation. The purpose of this invention is to provide a brake structure for this purpose.

An embodiment of this invention will be described in detail with reference to the drawings.The structure for operating the steering clutch portion A is as follows. That is, 1 is a lever connected to an operating lever (not shown) of a power working machine, a lever rotation shaft 2 is connected to the lever part 1, and a cam 3 is attached to the tip of the lever rotation shaft 2. A cam operating body 4 that slides laterally along the lever rotation shaft 2 is fitted therein. Reference numeral 5 denotes a spring for returning the actuating body 4 to horizontal sliding.

A pin 6 is provided protruding from the cam operating body 4, and the pin 6 engages with one end 7-1 of the clutch operation plate 7 in the steering clutch portion A, and the other end 7-1 of the clutch operation plate 7. 2 is rotatably fitted loosely into the case 8, and by sliding one end 7-1 of the clutch operation plate 7 via the pin 6 by the lateral sliding of the cam actuating body 4, the other end 7-2 is centered. Clutch operation plate 7
can be tilted freely.

Reference numeral 9 denotes an adjusting case for adjusting the position of the loosely fitted portion of the other end 7-2 of the clutch operation plate 7, and by changing the position where it is connected to the case 8, the other end 7-2 of the clutch operation plate 7 can be adjusted. -Perform position adjustment in step 2.

10 is a power output shaft inserted through the center of the clutch operating plate 7, and is interlocked and connected by a prime mover, and a multi-plate clutch 1 is attached to the tip of the power output shaft 10.
1 are consecutively installed.

An interlocking shaft 12 is connected to the power output shaft 10 via a multi-plate clutch 11, and a pressure plate 13, which can be press-fitted to the multi-plate clutch 11, is connected to the clutch operation plate 7.
The pressure plate 13 is connected to the multi-plate clutch 11 by a connecting bolt 14, and when the clutch operation plate 7 is tilted, the pressure plate 13 can be freely pressed against the multi-plate clutch 11 to perform a clutch function. 1
5 is a spring. 16 is a running shaft that is interlocked with the interlocking shaft 12 via a gear 17, and 18 is a gear for a chain winding frame provided on the running shaft 16.

The steering clutch section A configured as described above is
The power output shaft 10 and the travel shaft 1 are activated by the operation of the lever rotation shaft 2, the cam actuating body 4, the clutch operation plate 7, etc. by the operation of the lever part 1 connected to the operation lever.
Clutch operation with 6 is performed.

On the other hand, the structure for operating the brake section B in conjunction with the operation of the lever section 1 is as follows.

That is, the cylindrical body 19 is loosely fitted to the lever rotation shaft 2 of the lever part 1, and the protruding piece 20 protruding from the lever part 1 and the receiver 21 protruding from the cylindrical body 19 are connected to the lever part 1. The projecting piece 20 is configured to engage with the receiver 21 and rotate the cylindrical body 19 by the rotation.

Reference numeral 22 denotes an adjustment bolt provided at the contact portion of the protruding piece 20 of the receiver 21, and by adjusting the abutment interval between the protruding piece 20 and the receiver 21, the lever rotation shaft 2 and the cylindrical body 19 are adjusted. The operating time difference is adjusted to form an appropriate operating time difference between clutch operation and brake operation.

A brake rod 23 is connected to the cylindrical body 19, and left and right connecting members 24, which are bifurcated in side view, are pivotally attached to the tip of the brake rod 23.
Both ends of the connecting member 24 are connected to two band connecting parts 25-1 and 25-2 protruding from the brake band operating body 25 via pins 24a rotatably and pivotally connected to both ends. are connected to each other,
The brake band operating body 25 is configured in a bifurcated shape in a plan view with both ends thereof being paired as a left and right pair to form two band connecting portions 25-1 and 2, and the middle portion thereof is connected to a rotating shaft 26 as described later. It is supported by

The brake band operation body 25 is configured to be rotatable by an integrated rotating shaft 26, and a main brake coupling body 27 connected to a main brake foot pedal (not shown) is attached to the rotating shaft 26. In addition to performing a brake operation for steering on one side of the traveling part at the same time as the clutch operation of the steering clutch part A that is protrudingly provided, a brake operation to stop the running of the power working machine itself is performed separately. It is configured so that it can be done.

That is, at the tip of the brake rod 23 that is interlocked and connected to the cylindrical body 19, two curved connecting members 24b and 24c configured in a horseshoe shape are pivotally connected. The two connecting members 24b and 24c have their proximal ends pivotally supported to each other, and the distal end of the brake rod 23 is further pivotally connected to the same pivoting portion.
b and 24c are formed in a horseshoe shape at the tip of the rod 23 and are connected to each other.

Moreover, both ends of the brake band 30 are connected to the tip portions of the multi-connecting members 24b and 24c, respectively, and both ends of the brake band 30 are disposed such that the extension lines of the brake band 30 intersect with each other. It is.

In the figure, 32 is a connecting plate connected to the connecting member 24b connected to one end of the brake band 30, the flat plate is folded back and the folded part is formed into a ring shape, the ring-shaped part is used as the connecting member, and the folded flat plate is The end portions of the brake band 30 are pressed from both sides and fixed with rivets so as to be integrally connected to the band 30. On the connecting plate 32 of the folded portion, a connecting member 24b is provided with a protruding tip at the tip. A pin 24a is loosely fitted to pivotally connect the tip of the connecting member 24b and one end of the brake band 30 via the pin.

Further, 33 is a band connecting member to the connecting member 24c connected to the other end of the brake band 30. Specifically, a bolt 34 is connected to the brake band 30 via the connecting plate 33, and the bolt 34 is connected to the brake band 30 through the connecting plate 33. A cylindrical nut 36 is screwed into the cylindrical nut 36, and the nut 36 is inserted into the insertion hole 31 of the connecting plate 32 connected to one end of the brake band 30, and the brake band 3
The bolts 34 cross each other in the direction of both ends of the brake band, and the brake actuation of the brake bands is performed. The circumferential surface of the pipe 35 is pressed against the tip of the aforementioned cylindrical nut 36, and the connection position between the pipe 35 and the bolt 34 can be adjusted by adjusting the rotation of the nut 36. ing.

Further, a rotating shaft 26 is disposed on the case 8 at a location approximately in the center of the two connecting body members 24b and 24c, and the rotating shaft 26 has a brake band operating arm having arms radiating in opposite directions. The center of the body 25 is integrally connected, and the operating body 25 rotates together with the coaxial shaft 26.

Furthermore, band connecting portions 25-1 and 25-2 are formed at the tips of the two arms of the operating body 25, each facing in the same direction and having a partially cut-out opening.
The above-mentioned connecting plate 31 tip and pipe 35 are removably engaged with the connecting portions 25-1, 25-1, and the band connecting portions 25-1, 25-1 are removably engaged with the pipe 35, respectively. The opening directions of the openings 2 open toward the extension direction of both ends of the intersecting brake band 30, and the relationship between the opening direction and the direction of movement of the tips of the connecting members 24b and 24c when the brake is activated is as follows. are set in substantially the same direction.

Therefore, as the clutch is operated, the connecting members 24b and 24c are operated via the brake rod 23 to effectively tighten the brake band 30 in the direction of brake operation, as will be described later in the description of the operation of the present invention.

Further, a stopper protrusion 28 is connected to the rotating shaft 26, and the stopper protrusion 28 can come into contact with a stopper bolt 29 connected to the case.

That is, it restricts the brake band operating body 25 from rotating beyond a certain range,
Because the two connecting members 24b and 24c are only displaced in a certain direction within a certain range due to the regulation of the operating body 25, the tip of one of the connecting members is detached from one of the band connecting parts when the brake rod is operated. Even if the other connecting member distal end is engaged with the other band connecting portion, the brake band can be operated reliably as described below.

Here, the brake band operating body 25 will be explained. The operating body 25 is used not only for brake operation when the clutch is activated, but also for performing brake operation using the original foot pedal, and is a main brake connection that is linked to the foot pedal. By interlocking and connecting the body 27 to the rotating shaft 26, the brake band operating body 25 can be rotated via the rotating shaft 26 by operating the foot pedal, and the connection engaged with the arm tip of the operating body 25 can be made to rotate. By displacing the plate 31 and the pipe 35 in the direction in which both ends of the brake band 30 operate the brake, the brake can also be operated using the foot pedal.

38 is a lid removably provided in the adjustment hole 37. 39 is a spring for relaxing the brake band 30.

The embodiment of this invention is constructed as described above, and the force required to operate the steering clutch part A with the lever part 1 is determined by the lever ratio, the cam 3 of the lever rotation shaft 2, and the cam actuating body 4. When the operation of the brake rod 23 is transmitted to both ends of the brake band 30 via the two connecting members 24b and 24c and the braking action begins, The band 30 rotates in response to a force in the rotation direction of the outer periphery of the clutch, which is transmitted to the brake operating body 25 via a connecting plate 31 or pipe 35 connected to the end of the brake band 30 on the opposite side to the rotation direction. However, since the operation of the operating body 25 is limited, the tensile force in the rotational direction is supported at the limit of the rotation range. Note that the displacement of both ends of the brake band 30 due to the rotation of the brake band 30 is absorbed by changing the intersection angle between the brake rod 23 and each connecting member 24b, 24c, so the rotational force does not reach the brake rod 23. do not have.

On the other hand, the end of the brake band 30 in the rotational direction is connected to the connecting plate 31 or the pipe 35 on the opposite rotational direction.
However, since it is fixed to the brake band operating body 31 by the above-mentioned tensile force, the pivot point between the other connecting member and the brake rod 23 is approximately centered on the tip of the connecting plate 31 fixed above or the pipe 35. Since the brake rod 23 operates in an arcuate trajectory and the operation of the brake rod 23 continues to be transmitted through the other connecting member, a stronger braking action is performed.

In addition, if it is necessary to adjust the tightening state of the brake band 30, adjust the length of the band connecting member 33 using the cylindrical nut 36 through the adjustment hole 37 to tighten the brake band 30 more or less, and adjust the brake. do.

Also, one end of the brake band 30 is connected to the bolt 3
4. The hexagonal cylindrical nut 36 can be connected to one end of the brake band operating body 25 in a length-adjustable manner, and the rotation of the brake band operating body 25 can be performed without any hindrance when the brake band 30 is tightened. ing. Further, the length of the brake band 30 can be easily adjusted from outside the case 8.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional side view of the proposed brake structure. FIG. 2 is a sectional view taken along the - line in FIG. 1. Figure 3 shows
FIG. 2 is a sectional view taken along the - line in FIG. 1; FIG. 4 is a view taken along the line shown in FIG. 22: Adjuster bolt, 23: Brake rod, 24: Connecting member, 25: Brake band operating body, 26: Rotating shaft, 27: Main brake connecting body,
28: Stopper projection piece, 29: Stopper gilt, 30: Brake band, 31: Insertion hole, 3
2: Connecting plate, 33: Band connecting member, 34: Bolt, 35: Pipe, 36: Hexagonal cylindrical nut, 3
7: Adjustment hole, 38: Lid body.

Claims (1)

[Scope of utility model registration request] In the steering clutch part A and the steering brake part, in which the outer periphery of the multi-plate clutch 11 of the steering clutch part A connected to the left and right running parts is configured as a drum of a band brake, a clutch operation plate 7 is provided on the clutch part A. , the base end of the clutch operating plate 7 is supported by a case 8, and a cam actuating body 4 is slidably and loosely fitted to the tip of a lever rotating shaft 2 connected to the lever part 1. By connecting the tip of the clutch operating plate 7 to the lever rotating shaft 2 and sliding the cam operating body 4 via the cam 3 connected to the lever rotation shaft 2, the clutch operating body pivotably supported by the case 8 is formed. The clutch operation plate is tilted and raised using the base end of the clutch 4 as a fulcrum, and the power is transmitted from the steering clutch part A through the pressure plate 13 of the multi-plate clutch 11 which is interlocked and connected to the middle part of the operation plate 7. In addition to being configured to perform the cutting 13, the cylindrical body 19 is loosely fitted to the lever rotation shaft 2, and the engagement between the protrusion 20 protruding from the lever rotation shaft 2 and the receiving body 21 protruding from the cylindrical body 19 is achieved. The cylindrical body 19 is rotated through the joint, and the cylindrical body 1
The proximal ends of two connecting members 24b and 24c arranged in a horseshoe shape are pivotally connected to the tip of the brake rod 23, and the connecting members 24b ,2
4c are pivotally connected to both free ends of the brake band 30, and in this pivotally connected state, a connecting plate 32 having an insertion hole 31 is connected to one end of the brake band 30, and the connecting plate 32 A bolt 34 is connected to the other end of the brake band 30, and the bolt 34 is attached to the pipe 3.
A cylindrical nut 36 is screwed onto the tip of the bolt 34, and the nut 36 is brought into contact with the pipe 35, and both connecting members 24
A brake band operation body 25 whose operation is restricted by a stopper bolt 29 inserted through the case 8 is rotatably disposed approximately in the middle position between b and 24c.
The operating body 25 has two arms protruding radially, and a band connecting part 25-1,
25-2, each connecting portion 25-1, 25-2
The brake band connecting plate 32 and the pipe 35 are removably engaged with each other, and the connecting portions 25-1,
25-2 is partially cut out in the extension direction of both ends of the brake band 30 to form an opening 25-3;
The brake band operating body 25 is configured to be detached from the connecting portions 25-1 and 25-2 through the openings 25-3, and the brake band operating body 25 is interlocked and connected to a foot pedal for brake operation, and is connected to a cylindrical nut 36. The tip of the brake band 30 is inserted into the insertion hole 31 of the connecting plate 32 of the brake band 30.
This brake structure is also used as a steering clutch for a power working machine, and is configured so that the length of a brake band 30 can be adjusted from outside the case 8 by inserting the brake band 30 into the case 8 and protruding it outside the case 8.