JPH0231028A - Centripetal regulation device of brake shoe - Google Patents

Abstract

PURPOSE:To respond to various kinds of brakes by composing to displace a little a pair of rollers in the longitudinal direction of a brake shoe on condition that the brake shoe is pressed from the outer side while keeping the separation distance between each of the pair of rollers and the centripetal point of the brake shoe at the same distance. CONSTITUTION:After the composition is installed to a centripetal regulation device, the composition is fixed by operating a lever 221. Then, the first cylinder 206 is operated, a spindle support 203 is rotated clockwise, and five rollers 2 are displaced to the inner side in the diameter direction. As a result, the ends in the longitudinal direction of a brake shoe 1 are being pressed continuously by the rollers 2. And the second cylinder 202 is contracted a specific stroke to rotate a base 201, and the rollers 2 are displaced synchronously in the circumferential direction, to carry out a centripetal regulation of the brake shoe 1. Since the rollers 2 are at both ends in the longitudinal direction of the brake shoe 1 in such a composition, they can respond to a brake shoe of a different diameter.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a brake shoe centripetal adjusting device for correcting the brake shoe to its normal position before assembling the drum when assembling a drum type brake.

(Prior art and its problems) A drum type brake is assembled in the following order: first, a pair of brake shoes, which are its constituent elements, are assembled, and then a brake drum is assembled.

By the way, even if the diameter of a pair of brake shoes is reduced to the maximum, it is customary to have a diameter 1-1 smaller than the inner diameter of the drum, and the difference between the drum and brake shoes is The clearance between them is extremely small. Therefore, it is necessary to centripetally adjust the brake shoes before assembling the drum. That is,
If the brake shoes are deviated from their normal positions, there is a problem in that the drums interfere with the brake shoes when the drums are assembled, resulting in damage to these elements. Particularly when the assembly of the drum is automated, even if the drum is assembled while damaging the brake shoes, it is difficult to detect this.

One conventional example of a centripetal device for brake shoes is one in which a pair of brake shoes are sandwiched from the outside using a jig having the same curved surface as the outer surface of the brake shoes.

According to this conventional example, since the centripetal adjustment is performed while grasping the brake shoe with a surface, there is an advantage that centripetal adjustment can be performed accurately no matter how the brake shoe is deviated. However, on the other hand, since the - model requires a special centripetal adjustment device,
The drawback is that it is not versatile for brake shoes with different curvatures. For this reason, there is a problem in that a dedicated centripetal adjustment device must be rebuilt every time there is a change in the design of the brake, and it is difficult to apply it to mixed production of multiple models. are doing.

Another conventional example is disclosed in Japanese Utility Model Application Publication No. 59-171035. This centripetal adjustment device moves a pair of rollers placed corresponding to both ends of the brake shoe in the longitudinal direction from the outside of the brake shoe to a predetermined position on the circumference 11 with a diameter slightly smaller than the inner diameter of the drum, and then fixes the rollers. Then, by expanding the diameter of the brake shoe, centripetal adjustment of the brake shoe is performed. According to this device, by changing the movement Gl of the pair of rollers (the fixed position of the rollers), it is possible to adapt to multiple types of brakes.

However, in order to perform centripetal adjustment by enlarging the diameter of the brake shoe in this manner, it is naturally necessary to attach a mechanism for enlarging the diameter of the brake shoe to the centripetal adjustment device. By the way, in the device disclosed in the same publication, by providing a weight on the adjuster as a brake shoe clearance adjustment mechanism and driving a gear that meshes with the weight,
The diameter of the brake shoe is expanded. In this way, if a gear and a means for driving the gear are attached to the centripetal adjustment device, the device becomes complicated, and if the weight and the gear do not mesh well, the structure of the brake product will be changed. Risk of damage to elements. Furthermore, even if it were possible to accommodate many different types of brakes, the amount of roller movement (fixed position) would need to be adjusted for each model, so an adjustment mechanism would also need to be provided. , Also from this point of view, there is a problem that the centripetal adjustment device becomes complicated.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a centripetal device for a brake shoe that has a simple configuration and is compatible with many types of brakes.

(Means and effects for solving the problem) The present invention reviews the centripetal adjusting device from the centripetal point of the brake shoe, and if the brake shoe is located on the circumference centering on the centripetal point, then This means that the centripetal adjustment of the brake shoes has been properly made, and is based on the idea that there will be no interference when attaching the drum to the drum.

That is, in the present invention, as shown in FIG. 1, the brake shoes are provided corresponding to each of the pair of brake shoes 1, and are arranged so as to face both longitudinal ends of the brake shoes from the outside. The pair of rollers 2 are moved in a direction that suppresses the brake shoe 1 while keeping the distance C between each of the pair of rollers 2 and the centripetal point O of the brake shoe 1 the same. a first driving means for displacing each of the pair of rollers 2;
Distance between centripetal point O of brake shoe 1 in YI °C
and a second lower drive stage that slightly displaces the pair of rollers 2 in the longitudinal direction of the brake shoe 1 while pressing the brake shoe 1 from the outside while keeping the same.

With the above configuration, both ends of the brake shoe 1 in the longitudinal direction are pressed by the rollers 2, so it is possible to press the brake shoe 1 radially inward regardless of the curvature of the brake shoe 1. . However, even if the distance C between each of the pair of rollers 2 and the brake shoe 1 is kept the same and the brake shoe 1 is displaced in the direction of pressing from the outside, the brake shoe 1 will be You can't make it centripetal. Regarding this point, the first
To explain in detail with reference to the figure, the brake shoe 1 is usually ``displaced'' under -F as shown by the solid line in the figure, and for this reason, the roller 2 is displaced in the X direction. Even so, as shown in the figure, only the - roller 2 presses the brake shoe I. That is,
There is no action until the vertical "misalignment" of the brake shoe 1 is corrected. In order to correct this vertical "misalignment" of the brake shoe 1, it is necessary to physically apply force to the brake shoe 1 in the vertical direction in the figure. Therefore, in the present invention,
The roller 2 is slightly displaced in the longitudinal direction Y of the brake shoe 1 while the brake shoe 1 is pressed from the outside.

Due to this displacement movement of roller 2 in the X direction, brake shoe 1
A vertical force is applied to the brake shoe 1, and as a result, the centripetal adjustment to the brake shoe 1 at its normal position, that is, on the circumference Z centered on the centripetal point O, is completed.

Even if the brake shoe 1 is of a different model, the roller 2 presses the brake shoe 1 in the X direction in its operating state, so the amount of displacement of the roller 2 in the X direction is set in particular. There's no need. Therefore, no matter what type of brake is used, it is possible to correspond to one minute without changing the operating state of the centripetal adjustment device.

Incidentally, since the application of force in the downward direction Y to the brake shoe 1 is performed by the roller 2, there is no risk of damaging the lining (not shown) due to the transfer of the roller 2.

(Example) FIG. 2 shows an assembly line for a brake system, in which reference numeral 11 indicates an assembly line for brake drums, and L2 indicates an assembly line for drum type brakes. ] The brake tram 3 that has passed through the washing machine 10 is carried into the second line L1, and this line 1. -, At station Sl of I, bearings and the like are assembled to the brake tram 3.

The brake drum 3, on which the various elements have been assembled in this way, is transferred onto a pallet 12 running on the line L2 by the conveyor 11.

The line L2 is provided with stations 82 to 87 from the upstream side to the downstream side, and at the station S2, the brake shoe 1 is assembled to the drum 3, and at the station S3, the lock nut of the brake system is installed. The brake shoe 1 is tightened and the diameter of the brake shoe 1 is expanded using air. At station S4, the lock nut is further tightened, and at station 5, the lock nut is crimped. Also station 6
At , the brake and suspension are assembled, and the assembled assembly is carried out from station S7.

As shown in FIG. 3, the station S2 is provided with a centripetal adjustment device 20 that centripetally adjusts the brake shoe 1. The solid body W is attached to the centripetal adjustment device 20 to perform centripetal adjustment of the brake shoes 1, and the assembly W after this centripetal adjustment is assembled onto the brake tram 3 of the pallet 121 by the transfer device 15. Below 5 the above transfer device 15 and centripetal adjustment/adjustment device 2
0 will be explained in detail based on the drawings from FIG. 3 onwards.

As shown in FIGS. 3 and 4, the transfer device 15 has a guide rail 151 that crosses the conveyor 11 on the -F side of station S2, and the main body 152 guided by the guide rail +51 is connected to the cylinder +53. by conveyor 1
It is possible to move in the direction across 1. Further, the main body +52 can be moved up and down by a second cylinder 155, and the main body 152 is provided with a pair of clampers 154 that extend up and down. The clamper +54 is rotatably attached to the main body 152 via a support shaft 156 at its longitudinally intermediate portion, and a third cylinder 157 is installed at the upper end of the clamper 154.
By expanding or shortening the clamper 7, the lower end of the clamper 154 is expanded or contracted. The lower end of the clamper 154 is provided with claws +58 extending opposite to each other, and the other assembly W is provided with claws +58 as shown in FIG.
A hole 159 is provided for receiving 58, so that the assembly W is clamped by the clamper 154.

As shown in FIGS. 6 and 7, the centripetal adjustment device 20 has a base 200 and a movable base 201, and the movable base 201 has a rail fixed to the north end of the base 200. 20
A moving base 2 that moves in the front and back direction of the page while being guided by 0a.
13, is rotatable about a vertical axis in a horizontal plane, and is driven by a second cylinder 202. The movable base 201 is provided with a spindle support 203 that extends up and down coaxially with the vertical axis, and the spindle support 203 supports the bearing 2.
04, and its lower end is connected to the link 20.
5 to a first cylinder 206, which is fixed to the movable base 201. The upper end of the spindle support 203 is a spindle support part 203a that opens on one side, and the assembly W is assembled by fitting the spindle 5 into the spindle support part 203a coaxially with the vertical axis. It is adapted to be attached to the adjustment device 20. A first link 209 is also rotatably attached to the north end of the spindle support 203 via a support shaft 208.
A shaft 2+1 is attached to the outer end of the link 209 via a bearing 210. One end of the second link 212 is integrally attached to this shaft 2]1,
Further, a roller 2 is rotatably attached. and,
1. The other end of the second link 2+2 is attached to the movable base 20+ via a bracket 214. This second
The structure for attaching the other end of the link 212 will be described in detail later.

Here, the rollers 2 are provided five times at intervals of the same circumference about the vertical axis, and these rollers 2 are connected to the first link having substantially the same length. 209 and a second link 212, the attachment points of the inner ends of these first links 209 are arranged on the same circumference centered on the vertical axis, and similarly the second link 212 The attachment point at the other end is located on the same circumference around the vertical axis and is attached to the spindle support 203.
When the rollers 2 rotate, each roller 2 rotates as shown in FIG.
are synchronously displaced inwardly and outwardly at the same ra.

The centripetal adjusting device 20 also has a rotation adjustment means 220 for regulating the rotation of the assembly W, as shown in FIG. It is roughly composed of an engaging plate 221 that fits together and a tension spring 222, and the engaging plate 221 is attached to the base 200 via a bracket 223. More specifically, the engagement plate 221
The engagement plate 221 is configured to be able to rotate up and down about 24, and a four part 221a is formed at the tip of the engagement plate 221 (see FIG. 6), and this concave part 221a is engaged with the bottle part P of the assembly W. ing. The tension spring 222 is connected to the engagement plate 22.
A hook is passed between 1 and the bracket 223, and when the engagement plate 221 is engaged or disengaged with the bottle part 1], this state is maintained by the tension spring 222. It looks like this. In addition, the engagement plate 22
1, a lever 225 is attached, and the operator can press the lever 225.
5, a state of engagement or disengagement between the engagement plate 221 and the pin portion P is generated.

In the above configuration, after the operator attaches the assembly W to the centripetal adjustment device 20, the operator operates the lever 221 to fix the assembly W. Thereafter, the operation of the first cylinder 206 is started, the spindle support 203 is rotated clockwise in FIG. 6, and the five rollers 2 are displaced radially inward (see FIG. 9). The reason why five rollers 2 are provided here is because the arrangement of the brake shoes 1 is different between the assembly W for the right wheel and the assembly W for the left wheel. For example, the arrangement shown in FIG. Therefore, in the assembly W for the left wheel, the arrangement is shifted by 90 degrees. Further, a brake shoe -I-1 indicated by a broken line in the same figure indicates a brake shoe 1 of an assembly W of a different model.

Due to this radially inward displacement movement of the roller 2, each longitudinal end of the brake shoe 1 is pressed from the outside, and the first
This results in the state shown by the solid line in the figure. The first cylinder 206 continues to operate thereafter, and the brake shoe 1 continues to be pressed by the roller 2. While this suppressed state is maintained, the second cylinder 202 is expanded and contracted by a predetermined stroke, and the roller 2 is reciprocated by a small amount of movement in the Y direction of FIG. 1 (see FIG. 10).

As a result of the above-described operation, the brake shoe 1 is corrected for its misalignment and takes the heavy duty position as shown in FIG. 11. Thereafter, the roller 2 is displaced radially outward and returned to its original position (dashed line). The assembly W, which has been centripetally adjusted in this way, is transferred to the pallet 12 by the transfer device 15.
It is attached to the upper drum 3. Note that the station S2 is provided with a positioning means 30 below the conveyor 11, and this positioning means 30 moves the drum 3 on the pallet 12.
is positioned at a predetermined position (see FIG. 4).

12 and 13 show the structure of the second link 212 and the bracket 2+4, and the second link 212 and the bracket 2+4 are attached to each other.
+2 is attached to bracket 2+4 via eccentric shaft 230. That is, the eccentric shaft 230 is
The head portion 230a and the shaft portion 230b are eccentric by δ (1 mm in the embodiment). The head portion 230a of the eccentric shaft 230 has a total of 14 recesses 230c equiangularly formed around its circumference. It is said to be adjustable. In this embodiment, two bolt holes 232 into which the bolts 231 are threaded are provided, and by changing the bolt holes 232 into which the bolts 231 are threaded, the eccentric shaft 230 can be adjusted in its eccentric position in units of 28 divisions. can be adjusted. By adjusting the eccentricity δ of the eccentric shaft 230 in this way, the length of the second link 212 is substantially changed, and as a result, the radially inward displacement W of the roller 2 is adjusted. It is considered possible. As a result, when the positions of the rollers 2 deviate from the same circumference due to friction between the rollers 2, this can be corrected by appropriately adjusting the eccentric position of the eccentric shaft 230.

One embodiment of the present invention has been described above. According to this embodiment, each roller 2 is displaced radially inward by the l cylinder 206 via the link 209.2+2. Synchronous movements and uniformity of their displacements can be guaranteed. Similarly, by rotating the movable hess 201 to which the rollers 2, etc. are assembled, each roller 2
can rotate relative to the assembly q body W, it is possible to ensure synchronized displacement movement of each roller 2 in the circumferential direction, and the cylinder 202 that drives the stiffness is It has the advantage that only one is enough. Also,
Since the rollers 2 are arranged at both longitudinal ends of the brake shoes l, it is possible to accommodate brake shoes 1 having different diameters, and the rollers 2 are always pressed against the brake shoes in the operating state. Therefore, even if the brake shoes l have different diameters, there is an advantage that there is no need to set a radially inward displacement meter for each roller 2.

(Effects of the Invention) As is clear from the above description, according to the present invention, centripetal adjustment of the brakes of any model can be performed with a simple configuration without setting any special operating conditions. 1゜ possible

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the operation of the present invention, Fig. 2 is an overall tfA diagram of the brake assembly line in which the centripetal adjustment device is arranged, Fig. 3 is a plan view of the station showing the set of brake shoes and brake drums, Figure 4 is a side view of the assembly station for brake shoes and brake trams, Figure 5 is a schematic configuration diagram of the clamper, and Figure 6 is a plan view of the centripetal adjustment device. Fig. 7 is a sectional view taken along the line ■-■ in Fig. 6, Fig. 8 is a side view showing details of the anti-rotation means of the assembly W, Fig. 9 is an explanatory diagram of the operation of the roller that presses the brake shoe, and Fig. 1O. is an explanatory diagram showing the displacement movement in the direction of the roller when the brake shoe is pressed, Figure 11 is a diagram showing the completed centripetal adjustment of the brake shoe, and Figures 12 and 13 are the roller position adjustment! ′! ! Detailed view of the mechanism: Brake shoe, roller: brake drum: centripetal adjustment device, second drive means O6: first drive means W: assembly

Claims (1)

[Claims] (1) A pair of rollers provided corresponding to each of the pair of brake shoes and facing both longitudinal ends of the brake shoe from the outside, and each of the pair of rollers and the brake shoe. a first driving means for displacing the pair of rollers in a direction that presses the brake shoes while maintaining the same distance between the centripetal points of each of the pair of rollers and the centripetal points of the brake shoes; and second driving means for slightly displacing the pair of rollers in the longitudinal direction of the brake shoe while pressing the brake shoe from the outside while maintaining the same distance between the brake shoe and the brake shoe. Features a centripetal adjustment device for brake shoes.