JPS589002Y2 - Caliper weight balance mechanism of vertical floating type disc brake - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a type of disc brake in which a caliper floats vertically relative to a horizontally rotating rotor, thereby forcing friction pads to be compressed by the rotor from above and below.

The applicant has developed a disc brake with a vertically floating caliper that is suitable as a brake device for industrial machinery and has already filed an application. The weight of the friction pad on the upper side of the rotor (hereinafter referred to as the inner pad).

) acts as a force pressing against the rotor, and how to prevent the pad from dragging.

Regarding this problem, various studies and improvements have been made in connection with the above-mentioned requirements for supporting the caliper's own weight when the brake is released and for preventing an increase in the caliper stroke due to friction pad lining wear. The invention also relates to improvements in this regard.

In other words, the present invention enables the use of horizontally floating caliper type disc brakes (including both positive and negative types), which have been widely used in the past, by making a relatively simple modification of the guide pin configuration. This is extremely effective in terms of cost reduction through common parts.

The basic idea of this invention is to support the caliper's own weight, which presses during brake release (when not braking), by a balance spring stretched directly or indirectly between the support (fixed part) and the caliper. When adjustments are made to prevent an increase in the caliper stroke (in other words, an increase in the gap between the friction pad and the rotor) that occurs due to wear, the change in spring force of the balance spring caused by the change in relative position between the caliper and the support is adjusted.・It has a spring force receiving structure that can absorb the pressure.

In other words, a pin-type disc brake caliper equipped with a manual gap adjustment screw is mounted on a horizontally rotating rotor so that it floats vertically under the guidance of a guide pin that is slid through the support with the gap adjustment screw positioned below the rotor. A sleeve movable in the generatrix direction is slidably fitted to the outer periphery of the part where the guide pin extends upward from the support, and a balancer tensioned between the support and the lower end of this sleeve is slidably fitted. One end of the spring is brought into contact with the upper end of the sleeve, and the upper end of the sleeve is secured by a caliper static position adjusting nut (nut member) screwed onto the threaded part of the upper end of the guide pin so as to be able to adjust the movement in the axial direction. The force is transmitted to the caliper via the sleeve, the caliper stationary position adjustment nut, the guide pin, the lower end of the guide pin, and the fixed part of the caliper, and is balanced with the caliper's own weight.

According to such a configuration, the gap adjustment operation using the gap adjustment screw as the lining wear of the friction pad progresses,
Even if the relative position between the support and the caliper changes, and as a result the tension length of the balance spring changes, the guide pin of the sleeve can be adjusted by screwing in and out of the caliper stationary position adjustment nut that locks the upper end of the sleeve. Since the position relative to the caliper (that is, the resting position of the caliper) can be adjusted, it is easy to absorb changes in the tensioned length of the balance spring and keep the spring force constant.

The present invention will be described below based on embodiments shown in the drawings.

In the figure, 1 is a rotor that rotates horizontally, and 2 is a support, which extends from the device fixing part to the edge of the rotor 1.

Reference numeral 3 denotes left and right guide pins which are slidably fitted through the support 2 so as to be vertically movable.

4 is a caliper, which is supported by the left and right guide pins 3 so as to be able to float vertically under the guidance of the guide pins 3;
The upper side of the rotor 1 forms a housing portion 5 for a negative-actuation type hydraulic actuation mechanism (not shown) in this example, and the lower side of the rotor 1 forms a reaction portion 6.

Reference numerals 7 and 8 are inner and outer friction pads, respectively, and 9 is a manually operated gap adjustment screw screwed onto the caliper reaction portion 6.

The above configuration is almost the same as that of a conventional caliper in which a horizontally floating type caliper is used as a vertically floating type, and the feature of the present invention lies in the configuration of the three guide pin parts.

Since the structure of the guide pin 3 is bilaterally symmetrical, only one side will be explained for convenience.The lower end of the guide pin 3 is fixed by a fixing nut 10 to support the lower arm 4a of the caliper 4, and the upper end is slidably fitted to the upper arm 4b of the caliper 4 via a sleeve 11 which is externally slidably fitted to the guide pin so as to be movable in the generatrix direction.

Further, the sleeve 11 is pressed upward when one end of the balance spring 12 stretched between it and the support 2 comes into contact with its lower end, and the upper end of the sleeve 11 is formed at the upper end of the guide pin 3. Caliper static position adjustment nut 13 (slotted nut) screwed into the threaded part
It is locked by.

With the above configuration, the caliper's own weight that acts downward when the brake is released is balanced by the upward spring force of the balance spring 12 that is transmitted to the guide pin 3 via the sleeve 11 and then the caliper static position adjustment nut 13. No dragging occurs between the inner pad 7 and the rotor 1.

In addition, the caliper 4 is adjusted to absorb the wear of the upper and lower friction pads using the gap adjustment screw 9, which is performed according to the lining wear of the inner and outer friction pads 1 and 8. A relative position change occurs in the position that should be determined as the rest position (the caliper 4 is deflected downward in the figure), and the balance spring 12
Although the tension length of the caliper becomes shorter and the spring force increases, by adjusting the caliper resting position adjustment nut 13 by screwing it upward in response to this, even though the caliper resting position is displaced downward. The spring force balanced with the caliper's own weight can be kept constant.

Here, the procedure for operating the gap adjustment screw 9 and the corresponding operation for adjusting the spring force will be sequentially explained.

First, in the negative brake operation described above in this example, the hydraulic pressure acting on the hydraulic pressure operating mechanism is released to generate a piston forward force due to mechanical spring force.

Therefore, the inner friction pad 7 above the rotor is pressed against the upper surface of the rotor 1, and the caliper is further pushed upward by this reaction force.

As a result, the outer friction pad 8 is pushed through the reaction part gap adjustment screw 9 and pressed against the lower surface of the rotor, and as a whole, the inner and outer friction pads 7.8 clamp the rotor 1 from above and below, producing a braking force. .

Furthermore, when hydraulic pressure is applied to the hydraulic pressure operating mechanism again, the piston forward force and the generated mechanical spring force are canceled, so the caliper 4 moves downward, the outer friction pad 8 separates from the rotor 1, and the balance spring 12 After the caliper 4 moves down to a position where it is supported by the spring force of The brake is released and the brake is not applied.

Although such an operation is repeated, the rest position of the caliper 4, which is pressed when the brake is not applied, does not change and is determined as a position where its own weight and the spring force of the balance spring 12 are balanced.

However, as already mentioned, the linings of the friction pads 7.8 wear out over time, so when the brakes are not being used, the inner and outer friction pads 7.8 and rotor 1 can be
The gap between them gradually becomes larger.

Therefore, for example, if the spring force adjustment nut 13 is moved (loosened) slightly upward relative to the guide pin 3, the tension length of the balance spring 12 to balance the caliper's own weight should be constant. Therefore, the caliper 4 moves downward only by the amount of upward movement of the spring force adjusting nut 13.

Then, the inner friction pad 7 is placed outside the movement of this nut 13.
If the amount of lining friction is applied, the amount of gap between the inner friction pad 7 and the rotor 1 can be made equal to the initial one.

On the other hand, a large gap is created between the outer friction pad 8 and the rotor 1, which includes the lining wear of the outer friction pad 8 and the downward adjustment of the caliper 4. It is sufficient to match the initial gap amount by manual operation.

With this operation, the inner and outer friction pads 7.8
The gap adjustment between the rotor 1 and the rotor 1 is completed.

Needless to say, this operation can also be achieved by first screwing in the gap adjustment screw 9 and then tightening the spring force adjustment nut 12.

Furthermore, although the above explanation has been made for the case of a negative type, the same operation can be carried out for a positive type as well, except that the generation of the braking force corresponding to the hydraulic pressure action is reversed.

The button 14 is a locking pin for the caliper stationary position adjustment nut 13, and the lower end of the guide pin 3 and the fixed part of the caliper 4 are basically prevented from being pulled out downward from the guide pin 3. It is clear that this is the case.

As mentioned above, the caliper weight balance mechanism of the caliper vertical floating type disc brake according to the present invention can be commonly applied to the conventional caliper horizontal floating type by simply improving the configuration of the guide pin part. The practical benefits are extremely significant.

[Brief explanation of drawings]

The drawing is a front view of a disc brake showing an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Rotor, 2... Support, 3... Guide pin, 4... Caliper, 5... Hydraulic pressure operation mechanism housing part, 6... Reaction part, 7, 8... Friction Pad, 9...
- Gap adjustment screw, 10... Nut, 11... Sleeve, 12... Balance spring, 13... Caliper static position adjustment nut, 14... Stopping pin.

Claims (1)

[Scope of utility model registration request] Left and right guide pins are vertically movably slidably inserted into supports extending from the device fixing part to the edge of the horizontally rotating rotor, and calipers integrated with these guide pins are provided so as to be vertically floating. and the caliper has a hydraulic actuation mechanism for pressing the friction pad on the upper side of the rotor,
In a type of disc brake that has a manually operated gap adjustment screw on the lower side of the rotor, the left and right guide pins that penetrate and slide into the support are fixed to the caliper at their lower ends, or are assembled to prevent removal. , a sleeve having a nut member screwed and fixed on the upper end side thereof and slidably fitted on the upper end side of the guide pin so as to be movable in the generatrix direction; A balance spring that applies a spring force to support the caliper's own weight is provided, and the resting position of the caliper during non-braking can be varied by adjusting the fixing position of the nut member in the axial direction with respect to the guide pin. Caliper weight balance machine coffin etc.