Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
  • F16D51/00—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
  • B62L—BRAKES SPECIALLY ADAPTED FOR CYCLES
  • B62L1/00—Brakes; Arrangements thereof
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
  • F16D65/00—Parts or details
  • F16D65/02—Braking members; Mounting thereof
  • F16D65/10—Drums for externally- or internally-engaging brakes

Definitions

• the present invention relates to a drum brake mounted on a wheel of a vehicle such as a motorcycle, and in particular, to further improve the waterproof performance of a gap between a wheel hub as a rotating member and a brake panel as a non-rotating member.
• drum brake In vehicles such as motorcycles, many types of vehicles are equipped with a drum brake on wheels, and the drum brake is operated by a brake lever or a brake pedal.
• a drum brake mechanism In a vehicle equipped with such a drum brake, a drum brake mechanism is housed in a concave portion of a wheel hub that is a rotating member, and a concave portion is closed while supporting a main part of the drum brake mechanism with a brake panel that is a non-rotating member.
• a motorcycle in which the gap between the wheel hap and the brake panel is sealed with a labyrinth structure is known, for example, in Japanese Utility Model Publication No. 62-12913.
• FIG. 19 As a waterproof structure for such a drum brake, a conventional technique shown in FIG. 19 is known.
• the waterproof structure of the drum brake shown in FIG. 19 is described in Japanese Utility Model Publication No. 62-12913 for ease of comparison with the present invention. Is changed and shown.
• FIG. 19 is a cross-sectional view showing a waterproof structure of a drum brake mounted on a conventional wheel.
• the wheel 100 has a wheel hub 103 for accommodating the drum brake mechanism 102 in the recess 101, and a brake panel 1004 for closing the recess 101 and supporting the main part of the drum brake mechanism 102.
• Consists of The brake panel 104 has a panel portion 105 that covers the concave portion 101, and an outer peripheral fitting portion 106 that extends from the panel portion 105 into the concave portion 101 and fits into the concave portion 101.
• An object of the present invention is to provide a waterproof structure of a drum brake having a high waterproof effect even during a car washing operation by further enhancing waterproof performance of a gap between a wheel hub as a rotating member and a brake panel as a non-rotating member. It is in.
• a wheel hub having a concave portion for accommodating a drum brake mechanism, and a brake panel closing a concave portion while supporting a main portion of the drum brake mechanism are provided.
• a drum brake that seals the gap with the non-rotating member brake panel with a labyrinth structure
• the labyrinth structure is configured such that an outer peripheral surface of the brake panel is fitted into the concave portion, and an outer labyrinth is formed on the outer peripheral surface of the brake panel from outside the panel width direction into the concave portion.
• a waterproof structure for a drum brake is provided in which a groove and an inner labyrinth groove are provided in this order, and a cross-sectional area of the outer labyrinth groove is smaller than a cross-sectional area of the inner labyrinth groove.
• the drainage capacity of the outer labyrinth groove with a smaller cross section is smaller than that of the inner labyrinth groove with a larger cross section.
• the waterproof performance of the labyrinth structure that seals the gap between the wheel hub and the brake panel can be further enhanced, and the waterproof effect during the car washing operation can be enhanced.
• the wheel hub has a concave portion for accommodating the drum brake mechanism, and a brake panel for closing the concave portion while supporting a main part of the drum brake mechanism.
• a drum brake that seals the gap with the non-rotating member brake panel with a labyrinth structure
• the labyrinth structure In a portion below the axle of the drum brake, the labyrinth structure includes an outer labyrinth groove and an inner labyrinth groove in this order from the outside to the concave portion, and three types in the circumferential direction from the bottom to the vicinity of the axle height position. And a waterproof wall extending radially outward from the brake panel in these three types of drainage structures.
• the lowermost first drainage structure sandwiches the outer labyrinth groove. The height of the outer ribs and the intermediate ribs is minimized, and the distance between the wheel hub and the waterproof wall is maximized to improve drainage,
• the height of the outer rib and the intermediate rib sandwiching the outer labyrinth groove is the same as that of the first drainage structure, and the space between the wheel hub and the waterproof wall is the first drainage structure.
• the drainage structure is narrower than the drainage structure of
• the outer rib and the intermediate rib sandwiching the outer labyrinth groove are extended to be higher than the first and second drainage structures, and the distance between the wheel hub and the waterproof wall is increased.
• the water entering the outer and inner labyrinth grooves can be quickly drained by lowering the outer ribs and intermediate ribs and increasing the distance between the wheel hub and the waterproof wall. So it has good drainage.
• the outer ribs and the middle ribs are lowered, so that the gap between the outer labyrinth groove and the inner labyrinth groove is greatly increased. Can increase. Furthermore, in the second drainage structure, the distance between the wheel hub and the waterproof wall is made narrower than in the first drainage structure, so that the surface tension of the water accumulated in the lower part of the outer and inner labyrinth grooves causes the labyrinth structure to seal. And drainage can be ensured in a well-balanced manner. Therefore, it is possible to balance the drainage of water entering the outer and inner labyrinth grooves with the sealing property of the labyrinth structure.
• the outer ribs and intermediate ribs must be higher than in the first drainage structure, and the distance between the wheel hub and the waterproof wall must be narrower than in the first drainage structure. Thereby, the sealing property of the labyrinth structure can be improved. Furthermore, in the third drainage structure, by reducing the distance between the wheel hub and the waterproof wall, drainage can be ensured by the surface tension of water accumulated in the lower part of the outer labyrinth groove. In this manner, the waterproof performance of the labyrinth structure that seals the gap between the wheel hub and the brake panel can be further enhanced, and the waterproof effect during the car washing operation can be enhanced.
• a wheel hub having a recess for accommodating the drum brake mechanism, and a brake panel for closing the recess while supporting a main part of the drum brake mechanism,
• a drum brake that seals a gap with a brake panel, which is a non-rotating member, with a labyrinth structure, wherein the drum panel detents and supports the brake panel on a lyafork of a motorcycle.
• a waterproof structure of a rear drum brake of a motorcycle provided with a waterproof wall for stopping water directed to the labyrinth structure.
• the waterproof wall provided on the extending portion extends toward the outer peripheral portion of the spoke flange erected from the wheel hub. Since the range in which water is reflected on the outer surface of the extending portion toward the labyrinth structure can be further suppressed, the waterproof performance can be further enhanced.
• FIG. 1 is a side view around a wheel hub of a wheel according to a first embodiment of the present invention
• FIG. 2 is a cross-sectional view taken along line 2 — 2 of FIG.
• FIG. 3 is a side view of the configuration in which the brake panel is mounted on the wheel hub shown in FIG. 1;
• FIG. 4 is a longitudinal sectional view of the configuration in which the brake panel is mounted on the wheel hub shown in FIG. 3;
• Fig. 3 5-5 cross section
• Fig. 6 is a sectional view taken along line 6-6 in Fig. 3.
• Fig. 7 is a sectional view taken along the line 7-7 in Fig. 3.
• Fig. 8 is a sectional view taken along line 8-8 in Fig. 3.
• Fig. 9 is a cross-sectional view taken along line 9-9 in Fig. 3.
• Figure 10 is a rear view of the brake panel shown in Figure 3;
• Fig. 11 is a cross-sectional view taken along line 1 1 1 1 1 in Fig. 10.
• Fig. 12 is a cross-sectional view of Fig. 10 taken along the line 12--12.
• Fig. 13 is a sectional view taken along the line 13-13 in Fig. 10.
• Fig. 14 is a sectional view taken along the line 14-14 in Fig. 10.
• Fig. 15 is a sectional view taken along the line 15--15 in Fig. 3;
• FIG. 16 is a side view of a configuration in which a brake panel is assembled to a wheel hub according to a second embodiment of the present invention.
• Fig. 17 is a sectional view taken along the line 17-17 in Fig. 16;
• Fig. 18 is a rear view of the brake panel shown in Fig. 16;
• Figure 19 is a cross-sectional view showing the waterproof structure of a drum brake mounted on a conventional wheel. is there. BEST MODE FOR CARRYING OUT THE INVENTION
• FIGS. 1 and 2 show a motorcycle 10 around a rear wheel 20 according to a first embodiment of the present invention.
• the motorcycle 10 includes a rear swingable lyafork 11 extending rearward (to the left in the drawing) from a body frame (not shown), and a rear leek fork 11. And an axle 12 provided at the end.
• the axle 12 includes a wheel hub 21 rotatably provided via bearings 13 and 14 and a rear brake panel 30 adjacent to the wheel hub 21.
• rear brake panel 30 of the first embodiment shown in FIGS. 1 and 2 is the brake panel according to the present invention.
• the wheel hub 21 is a hub of the wheel 20 as a rear wheel.
• the wheel hub 21 has a pair of left and right disk-shaped spoke flanges 22, 22, which are set up radially outward from the outer peripheral portion, and is opened outward in the axial direction of the axle 12 and on the side of the rear brake panel 30. And a concave portion 23 having a circular shape in a side view.
• the left and right spoke flanges 2 2, 2 2 are members for attaching one end of a large number of spokes 24.
• reference numeral 25 denotes a driven sprocket for a wheel hub.
• the lya brake panel 30 includes a panel portion 31 for closing the opening of the concave portion 23, and an extension portion 32 in which a part of the panel portion 31 extends along the lya fork 11.
• the drum brake mechanism 0 is housed in the concave portion 23 of the wheel hub 21, and the main part of the drum brake mechanism 40 is formed by the panel portion 31 of the rear brake panel 30.
• the drum brake 20 A of the wheel 20 is composed of a wheel hub 21 as a rotating member, a rear brake panel 30 as a non-rotating member, and a drum interposed between the wheel hub 21 and the rear brake panel 30.
• the drum brake mechanism 40 is, for example, an expanding drum brake, which comes into contact with and separates from the anchor pin 41 and the brake operating shaft 42 supported by the panel 31 and the brake disk 43 in the recess 23.
• a pair of brake shoes 4 4 (only one is shown) attached to the anchor pin 41 so that the return springs 4 5 resiliently reduce the diameter of the pair of brake shoes 44, and brake operation
• a brake operation arm 46 provided on the shaft 42 is provided.
• the drum brake mechanism 40 is configured so that the brake operating shaft 42 is rotated by the brake operating arm 46 to expand the diameter of the brake shoe 44 so that the lining of the brake shoe 44 and the brake disc 43 are connected.
• the frictional force acts as a brake.
• the drum brake mechanism 40 is omitted from FIG.
• the wheel 20 has a waterproof structure in which a gap between the wheel hap 21 that is a rotating member and the rear brake panel 30 that is a non-rotating member is sealed by a lapirins mechanism 50.
• the labyrinth mechanism 50 will be described in detail.
• the labyrinth mechanism 50 includes an outer labyrinth groove 5 3 and an inner labyrinth groove on the outer peripheral surface 51 of the panel portion 31 from the outer side in the panel width direction (axially outer side of the axle 12 shown in FIG. 2) into the concave portion 23.
• the outer and outer labyrinth grooves 53, 54 are annular grooves formed on the outer peripheral surface 51 of the panel portion 31.
• the concave portion 23 is a circular hole having an opening 23 a having an inner diameter D1.
• the panel portion 31 is a disk having an outer diameter D2 and is smaller than the inner diameter D1 of the opening portion 23a.
• the dimension of the gap 52 between the inner peripheral surface of the opening 23 a and the outer peripheral surface 51 of the panel portion 31 is S. This dimension ⁇ 5 is extremely small.
• the dimension ⁇ 5 of the gap 52 can be easily set small, and the outer diameter of the rear brake panel 30 can be reduced. It can be made smaller and lighter. Furthermore, axle 1 2 (see Figure 2) By slightly bending, the fluctuation of the dimension 6 of the gap 52 can be suppressed even when the rear brake panel 30 is slightly inclined.
• the conventional technique shown in FIG. 19 has a structure in which a cover part 109 is extended so as to cover the outside of the wheel hub 103 from the outer peripheral fitting part 106.
• the entire outer peripheral surface 51 of the panel portion 31 is fitted into the concave portion 23 without having the cover portion 109. Since there is no cover portion 109, water from above does not enter through the gap between the cover portion 109 and the wheel hub 21. Therefore, waterproofness at the time of car washing is improved.
• the diameter of the bottom of the outer labyrinth groove 53 is D3.
• the bottom diameter of the inner labyrinth groove 54 is D4 and smaller than the bottom diameter D3 of the outer labyrinth groove 53.
• the groove depth H 1 of the outer labyrinth groove 53 is larger than the groove depth H 2 of the inner labyrinth groove 54. Is also small.
• the groove width of the outer labyrinth groove 53 is almost the same as the groove width of the inner labyrinth groove 54. Therefore, the cross-sectional area A 1 of the outer labyrinth groove 53 is smaller than the cross-sectional area A 2 of the inner labyrinth groove 54.
• groove depth H1 is also the height of the outer rib 55 and the intermediate rib 56 sandwiching the outer labyrinth groove 53.
• the inner labyrinth groove 54 is a groove sandwiched between the intermediate rib 56 and the inner rib 57.
• the rear brake panel 30 includes a waterproof wall 65 extending radially outward from the panel portion 31.
• FIG. 6 shows a cross section of the lowermost first drainage mechanism 61
• FIG. 7 shows a cross section of the second drainage mechanism 62
• FIG. 8 shows a cross section of the third drainage mechanism 63
• FIG. The cross section of the labyrinth structure above the third drainage mechanism 63 is shown in FIG.
• the lowermost first drainage mechanism 61 has the lowest height H 11 of the outer rib 55 and the intermediate rib 56,
• the distance W1 between the wheel hub 21 and the waterproof wall 65 is the widest, drainage structure.
• Outer 'inner labyrinth groove 5 3, 54 groove depth is small. In this way, by providing the large drainage channel 66 leading from the outer and inner labyrinth grooves 53, 54 to the outside, the drainage of the lowermost first drainage mechanism 61 can be enhanced.
• the range of the first drainage mechanism 61 is L1 (see Figs. 3 and 10).
• the second drainage mechanism 62 above the first drainage mechanism 61 is the same as the height of the outer rib 55 and the intermediate rib 56. H11 is the same lowest drainage structure as the first drainage mechanism 61.
• the distance W2 between the wheel hub 21 and the waterproof wall 65 in the second drainage mechanism 62 is smaller than the distance W1 between the wheel hub 21 and the waterproof wall 65 in the first drainage mechanism 61.
• the outer and inner labyrinth grooves 53, 54 have a small depth. In this way, by providing the slightly larger drainage channel 66 extending from the outer and inner labyrinth grooves 53, 54 to the outside, the drainage performance and sealing performance of the second drainage mechanism 62 are balanced. be able to.
• the area of the second drainage mechanism 62 is L2 (see Figs. 3 and 10).
• the third drainage mechanism 63 above the second drainage mechanism 62 is provided with the height of the outer rib 55 and the intermediate rib 56.
• H 12 is a drainage structure higher than the height H 11 of the first and second drainage mechanisms 6 1, 62.
• the reason why the height H12 is large is that the tips of the outer rib 55 and the intermediate rib 56 are extended toward the inner peripheral surface of the concave portion 23.
• the distance W2 between the wheel hap 21 and the waterproof wall 65 in the third drainage mechanism 63 is the same as that of the second drainage mechanism 62, and the wheel hub 2 in the first drainage mechanism 61
• the distance between 1 and the waterproof wall 6 5 is smaller than W 1. Therefore, the outer-inner labyrinth grooves 53, 54 have a relatively large groove depth.
• the range of the third drainage mechanism 63 is L3 (see Figs. 3 and 10).
• the labyrinth structure of the upper portion of the third drainage mechanism 63 has a height H1 of the outer rib 55 and the intermediate rib 56. It is the highest and is the same as the part shown in FIG.
• the outer and inner labyrinth grooves 53, 54 have a large groove depth. Moreover, it has almost no waterproof wall 65.
• the heights H 11 and H 12 of the outer rib 55 and the intermediate rib 56 refer to the height from the bottom of the outer labyrinth groove 53.
• the extension 32 of the rear brake panel 30 is formed with a waterproof wall 68 extending toward the outer periphery 22a of the spoke flange 22. ing.
• the waterproof wall 68 stops water flowing toward the labyrinth mechanism 50 by being reflected on the outer surface of the extension 32.
• the waterproof wall 68 is an arc-shaped wall member along the outer peripheral portion 22 a of the spoke flange 22.
• the tip of the waterproof wall 68 extends to near the end on the opening side of the wheel hub 21. For example, as shown by arrows in FIG. 15, even if water such as rainwater or washing water is reflected on the outer surface of the extension 32, there is no need to worry about going to the lapillin mechanism 50.
• FIG. 16, FIG. 17 and FIG. 18 show the area around the front wheel 70 of the motorcycle 10 according to the second embodiment of the present invention.
• the same members as those in the first embodiment shown in FIGS. 1 to 15 are denoted by the same reference numerals, and description thereof will be omitted. Also, in FIGS. 16 and 17, the drum brake mechanism 40 is omitted.
• the configuration of the section taken along line 6-6 is the same as the configuration shown in FIG. 6, and the section of the section taken along line 7-7 is the same as the configuration shown in FIG.
• the configuration of the section taken along line 8-8 is the same as the configuration shown in FIG. 8 above, and the configuration of the section taken along line 9-9 is the same as the configuration shown in FIG. 9 above, and description thereof will be omitted.
• FIG. 18 the configuration of the cross section taken along line 11-11 is the same as the configuration shown in FIG. 11 above, and the configuration of the cross section taken along line 12-12 is shown in FIG. 12 above.
• the structure is the same as that shown in FIG. 13 with respect to the cross section taken along the line 13-13, and the structure shown in FIG. 14 above is the cross section taken along the line 14-14. The description is omitted.
• a wheel 70 as a front wheel is rotatably provided on an axle 12 (see FIG. 2) via bearings 13 and 14. It comprises a haptic 71 and a front brake panel 80 adjacent to the wheel hub 71.
• the front brake panel 80 of the second embodiment shown in FIGS. 16, 17, and 18 is a brake panel according to the present invention.
• the wheel hub 71 has substantially the same configuration as the wheel hub 21 described above.
• the front brake panel 80 has almost the same configuration as the rear brake panel 30 described above, It has a panel part 81 that closes the opening of. However, the front brake panel 80 does not have the extension 32 and the waterproof wall 68 shown above.
• the drum brake 7OA of the wheel 70 is interposed between the wheel hub 71, which is a rotating member, the front brake panel 80, which is a non-rotating member, and the wheel hap 71, and the front brake panel 80.
• Drum brake mechanism 40 (see Fig. 2). Industrial applicability
• the outer labyrinth groove and the inner labyrinth groove are provided on the outer peripheral surface of the brake panel from the outside in the width direction of the panel into the recess in this order, and the cross-sectional area of the outer labyrinth groove is cut in the inner labyrinth groove.
• the clearance between the wheel hub and the brake panel can be reduced by appropriately setting the height of the outer rib and the intermediate rib sandwiching the outer labyrinth groove and the distance between the wheel hap and the waterproof wall.
• the waterproof performance of the labyrinth structure that seals can be further enhanced.
• the gap between the wheel hub and the brake panel is sealed by providing a waterproof wall on the extension to stop the rotation of the brake panel and to stop the water reflected on the outer surface of the extension and going to the lapiling structure.
• the labyrinth structure improves the waterproof performance.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Braking Arrangements (AREA)
• Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)

Priority Applications (8)

Applications Claiming Priority (1)

Publications (1)

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Family Applications (1)

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Citations (5)

• 2001
  • 2001-07-02 CN CNB018234348A patent/CN1289833C/zh not_active Expired - Fee Related
  • 2001-07-02 WO PCT/JP2001/005706 patent/WO2003008830A1/ja active Application Filing
  • 2001-07-02 BR BRPI0117073-2A patent/BR0117073B1/pt not_active IP Right Cessation
  • 2001-07-02 JP JP2003514141A patent/JP3640659B2/ja not_active Expired - Fee Related
  • 2001-11-22 TW TW090129147A patent/TW496841B/zh not_active IP Right Cessation
• 2002
  • 2002-02-22 KR KR10-2002-0009539A patent/KR100489775B1/ko not_active IP Right Cessation
  • 2002-03-22 AR ARP020101041A patent/AR033188A1/es active IP Right Grant
  • 2002-06-06 GR GR20020100274A patent/GR20020100274A/el not_active IP Right Cessation

Patent Citations (5)

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