JPH0311460Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention involves attaching a brake disc to a rotating shaft protruding from a transmission case, inserting near the outer periphery of this brake disc between a pair of inner and outer pads, and This invention relates to a disc brake in which a pair of pads are inserted into and removed from a member that supports them in the radial direction of the disc, and one pad is pressed by a hydraulic piston.

[Prior Art] Conventionally, a disc brake with the above configuration has the following features:
As shown in European Patent Application Publication No. 54779, a pad supporting member is formed with a through space into which a pair of pads can be inserted and pulled out along the radial direction of the disk, and the pads are inserted into the through space. A technique is known in which both pads are penetrated and supported by pins that are attached to a pad support member so as to be freely inserted and removed.

[Problem to be solved by the invention] According to the above-mentioned conventional technology, simply by removing the pin,
There is an advantage that both pads can be attached to and detached from the pad support member along the through space without disassembling the brake.

However, in order to remove the disk attached to the rotating shaft, it is first necessary to remove the entire pad support member including the pad and hydraulic piston, and then move it in the direction of the outer diameter of the disk to disengage it from the disk. However, the work of attaching and detaching them was troublesome and troublesome.

The present invention has been made in view of the above-mentioned circumstances, and has an object to provide a structure of a pad support member that allows disks to be easily replaced by reasonable modification.

[Means for Solving the Problems] A characteristic configuration of the present invention is that the supporting members of both pads are constituted by a pair of pad supporting members that are connected and fixed to each other so as to be divisible in the axial direction of the rotating shaft. Its functions and effects are as follows.

[Operation] According to the above configuration, by releasing the fixation of both pad support members by the split structure, removing the pad support member arranged in the disk removal direction, and then disconnecting the disk from the rotating shaft, the disk can be removed. It can be slid axially, thereby allowing the disk to be replaced.

In other words, in the case of a type in which only one pad is pressed, the pad support member on the side with the hydraulic piston is fixedly connected to the fuselage, etc., so it is not possible to separate the pad support member as described above. For example, it is difficult to remove the hydraulic piping that is connected to the fuselage side as in the past, and there is no need to attach or detach the integrated pad support member while being careful about movement, and it is simply connected and fixed. It is now possible to attach and detach only the outer pad support member, which is easy to remove and is easy to move.

[Effect of the invention] Therefore, the disc can be replaced without impairing the brake function by a relatively simple modification in which the members supporting both pads are formed into a split structure in the axial direction of the rotating shaft that supports the disc. A disc brake having a structure of a pad support member that can be easily and easily performed has now been provided.

Furthermore, since there is no need to move hydraulic piping, there is an advantage that there is less risk of brake failure due to disk replacement work, such as damage to the piping.

[Example] Hereinafter, an example of the present invention will be described based on the drawings.

As shown in FIG. 7, a vehicle body 3 has drive wheels 1 and 2 that can be steered at the front and rear, respectively, and an engine 4 is connected to the front part of the vehicle, and a hydraulic continuously variable transmission drive device 5 and a transmission case 6 are connected to the rear part of the vehicle body 3. As an example of a work vehicle, a mid-mount lawn mower is constructed by installing the mower 7 between the front and rear wheels 1 and 2 so that it can be driven and moved up and down.

As shown in FIGS. 1 to 5, a drive shaft 8 from the engine 4 is connected to the variable speed drive device 5, and the vehicle speed can be changed by pressing a pedal 9 on the right side of the vehicle body, and forward and backward changes can be made. The speed change drive device 5 includes an input shaft 10 to which the drive shaft 8 is connected, a first output shaft 11 disposed below the input shaft 10 facing forward, and an input shaft. 10
A second output shaft 10a protrudes from the back surface of the device 5 in direct connection with the second output shaft 10a, and a third output shaft 12 is provided below the output shaft 10a and directed rearward. The first output shaft 11 drives the front wheels 1 via a transmission shaft 13, and the second output shaft 10a drives an intermediate shaft 14, a hydraulic clutch 15, a gear interlocking mechanism 16, and a planetary reduction mechanism 17.
The rear PTO shaft 18 is driven through the gear link mechanism 16, and the mower 7 is driven through the front PTO shaft 19 at the lower part of the transmission case 6 and the transmission shaft 20.

The third output shaft 12 includes a gear interlocking mechanism 21,
The rear wheels 2 are driven via the differential device 22 and left and right operating shafts 23, 23. A sleeve 14 is spline-fitted into the transmission case inner portion of the left differential shaft 23 so as to be slidable in the axial direction of the left differential shaft 23, and the sleeve 24 and the case portion 22a of the differential device 22
The transmission case 6 is equipped with a so-called differential lock D that stops the operation of the differential device 22 by engagement of respective engagement mechanisms 24k and 22k. The sleeve 24 is urged by a spring 25 in the direction of engagement of the engagement mechanisms 22k and 24k, and the sleeve 24 is urged by a member 24 attached to the transmission case 6.
It is operated via a shift fork 28 by driving a piston 27 fitted inside the shift fork 6.

Pistons 29, 29, which are positioned substantially above the left and right differential shafts 23, 23 and can protrude outwards on both sides, are fitted into the left and right sides of the member 26, and are opposed to the pistons 29, 29. , and the bolts 3 are attached to the member 26 so that the members 30, 30 can be freely divided in the axial direction of the differential shaft 23 at a certain distance apart.
1..., and the respective members 26, 30, 3
0, the engagement recess 2 is inclined slightly rearward with respect to the vertical direction and is directed toward the differential shafts 23, 23.
6a, 26a, 30a, and 30a are formed. Then, the pads 32, 32 are inserted into the engagement recesses 26a, 30a, respectively, supported through the pins 33, and positioned between the pads 32, 32, so that the transmission case of the left and right differential shafts 23, 23 Disc brakes B, B are constructed by providing discs 34, 34 that are spline-fitted to the outer bosses 23a, 23a. In addition, both pads 32,3
2 removes the locking beta pin 35 and removes the pin 33.
By pulling out the pads 32, 32, the pads 32, 32 can be easily replaced because they can be removed along the engaging recesses 26a, 30a, that is, in the radial direction of the disk.

Oil passages 36a and 36b for supplying hydraulic oil to the pistons 27, 29, 29, respectively, are bored in the member 26, and the pistons 27, 29, 29,
The valves 37 and 38 that operate the valves 29 are the oil passages 36a,
36b, and are disposed in front and back in parallel on the upper part of the member 26.

The valves 37 and 38 are positioned in gaps between a hydraulic oil tank 39 and a fuel tank 40, which are disposed on the left and right sides of the upper part of the transmission case 6.

Further, the member 26 has a hole 26b facing in the vertical direction.
At the same time, a rotating shaft 41 having a diameter smaller than the inner diameter of the hole 26b by a certain amount is rotatably arranged in the hole 26b, and a ring material such as a rubber material that can be elastically deformed is attached to the upper and lower parts of the hole 26b. 42, 42 are arranged to support the rotation shaft 41. Cam surfaces 41a, 41a are formed on the left and right sides of the rotation shaft 41, and these cam surfaces 4
Rods 43, 43 are interposed between 1a, 41a and the back surfaces of the pistons 29, 29. When the parking brake pedal 44 disposed on the side of the pedal 9 is depressed, the upper arm 46 of the rotating shaft 41 is operated via a link 45 etc. linked to this pedal 44, and the brake is activated. be. At the same time, a lock mechanism 47 is interposed on the pedal 44 to maintain the operating state of the brake, and when the parking brake pedal 44 is depressed, the lock mechanism 47 is configured to maintain the operating state of the brake. The link members 42, 42 can be elastically deformed.

[Another Embodiment] Although this embodiment was applied to a lawn mower equipped with a disc brake, it may also be applied to an agricultural tractor or the like other than a lawn mower.

[Brief explanation of the drawing]

The drawings show an embodiment of the disc brake according to the present invention, and FIG. 1 is a vertical cross-sectional rear view of the transmission case, and FIG.
The figure is a vertical sectional side view of the transmission case, Figure 3 is a side view of the transmission case, etc., Figure 4 is a cross-sectional plan view of the pad attachment part, etc., Figure 5 is an enlarged plan view of the pad attachment part, and Figure 6 is a side view of the transmission case. FIG. 7 is a side view showing the linkage of the parking brake pedal, etc., and FIG. 7 is an overall side view of the lawn mower. 6... Transmission case, 26, 30, C... Support member,
29... Hydraulic piston, 30a... Engagement recess, 32...
Padded, 34...brake disc.

Claims (1)

[Scope of utility model registration request] A brake disk 34 is attached to the rotating shaft 23 protruding from the transmission case 6, and the vicinity of the outer periphery of the brake disk 34 is inserted between the pair of inner and outer pads 32, 32, and the pair of pads 32, 3
2 are inserted into and removed from a member C that supports them along the radial direction of the disk, and one pad 32 is pressed by a hydraulic piston 29, wherein both pads 32 , 32 support members C are formed by a pair of pad support members 26 and 30 which are separably connected and fixed to each other in the axial direction of the rotating shaft 23.