阅读说明：本技术 齿轨车辆用制动力平衡机构及装有该机构的带式制动装置 (Braking force balancing mechanism for rack-rail vehicle and belt brake device equipped with the same ) 是由 沈铭乾 艾正武 蒋廉华 吴世应 李�杰 于 2019-10-15 设计创作，主要内容包括：一种齿轨车辆用制动力平衡机构,包括杠杆臂、弹簧、制动杆和制动带,还包括制动力平衡机构,所述弹簧、制动杆和制动带均设有两个；所述制动力平衡机构包括关节座和关节杆；所述关节座的一端与所述杠杆臂的一端铰接,另一端通过竖向的铰接件与所述关节杆的中部铰接；所述关节杆的两端分别与两个所述弹簧的一端连接；所述关节杆的两端分别与两个所述制动杆的一端转动连接,两个所述制动带分别与两个所述制动杆的另一端连接。由于采用了上述技术方案,与现有技术相比,本发明通过两组弹簧来提供制动所需制动力,并通过两个制动杆和两个制动带进行制动力的放大、传递和输出,再配合制动力平衡机构,保证两套制动力放大执行机构的制动力平衡输出。(A braking force balance mechanism for a rack rail vehicle comprises a lever arm, a spring, a brake rod and a brake belt, and further comprises two braking force balance mechanisms, wherein the two springs, the two brake rods and the two brake belts are arranged; the braking force balance mechanism comprises a joint seat and a joint rod; one end of the joint seat is hinged with one end of the lever arm, and the other end of the joint seat is hinged with the middle part of the joint rod through a vertical hinge piece; two ends of the joint rod are respectively connected with one ends of the two springs; two ends of the joint rod are respectively and rotatably connected with one end of each of the two brake rods, and the two brake belts are respectively connected with the other ends of the two brake rods. Due to the adoption of the technical scheme, compared with the prior art, the brake system provided by the invention has the advantages that the braking force required by braking is provided by the two groups of springs, the amplification, transmission and output of the braking force are carried out by the two brake rods and the two brake belts, and the balanced output of the braking force of the two sets of braking force amplification executing mechanisms is ensured by matching with the braking force balancing mechanism.)

1. A braking force balance mechanism for a rack-and-pinion vehicle comprises a lever arm, a spring, a brake lever and a brake band, and is characterized in that: the brake device also comprises a braking force balance mechanism, and the number of the springs, the number of the brake rods and the number of the brake belts are two; the braking force balance mechanism comprises a joint seat and a joint rod; one end of the joint seat is hinged with one end of the lever arm, and the other end of the joint seat is hinged with the middle part of the joint rod; two ends of the joint rod are respectively connected with one ends of the two springs; two ends of the joint rod are respectively and rotatably connected with one end of each of the two brake rods, and the two brake belts are respectively connected with the other ends of the two brake rods.

2. The band brake apparatus according to claim 1, characterized in that: first through holes are formed in the two ends of the joint rod along the length direction of the springs, adjusting screw rods are arranged in the first through holes, and one ends of the two springs are connected with the two ends of the joint rod through the adjusting screw rods respectively.

3. The band brake apparatus according to claim 1 or 2, characterized in that: the two ends of the joint rod are respectively provided with a square sleeve, the square sleeve is provided with a second through hole matched with the first through hole, one end of the adjusting screw rod is installed in the first through hole and the second through hole, and the other end of the adjusting screw rod is connected with one end of the spring.

4. A belt brake apparatus equipped with the braking force balance mechanism for a rack-rail vehicle according to any one of claims 1 to 3, characterized in that: the brake device further comprises a brake drum, and the two brake belts are sleeved on the brake drum in parallel.

5. The band brake apparatus according to claim 4, characterized in that: the other end of each brake rod is provided with a crank arm, the middle part of each crank arm is fixedly connected with the other end of each brake rod, and the two ends of each crank arm are respectively connected with the two ends of the corresponding brake belt.

6. The band brake apparatus according to claim 5, characterized in that: the bogie frame comprises a mounting plate and a mounting support, and a first hinge hole and a second hinge hole are formed in the mounting support; the other end of the spring is fixedly arranged on the mounting plate; the end part of the lever arm close to the joint seat is provided with a first rotating pair, the joint of the crank arm and the other end of the brake rod is provided with a second rotating pair, the first rotating pair is rotatably connected with the first hinge hole, and the second rotating pair is rotatably connected with the second hinge hole.

7. The band brake apparatus according to claim 6, characterized in that: still including alleviating the floodgate jar, alleviate the floodgate jar one end with the other end of lever arm is articulated, and the other end is installed on the mounting panel.

Technical Field

The invention relates to the field of braking equipment, in particular to a braking force balance mechanism for a rack-rail vehicle and a belt type braking device with the same.

Background

The basic brake device that domestic urban rail vehicle adopted mainly includes: the braking force provided by the basic braking unit directly or indirectly acts on the wheel pair, and finally the braking and parking of the vehicle are realized through the interaction between the wheel and the rail. However, the existing railway vehicle is limited by adhesive braking force, cannot improve the braking force without limit, and cannot meet the braking requirement of the vehicle on an oversized ramp. The rack rail vehicle is in meshed transmission between the gear disc and the rack rail, braking force acts on the rack rail through the gear disc, the defect of insufficient wheel rail relation is effectively overcome, and the functions of braking, parking and the like of the vehicle on the super-large slope are achieved.

The conventional belt brake device is mainly applied to equipment such as mining machinery, ship anchors, winches and the like, and in order to prevent the risk that hydraulic power assistance is lost and braking force is lost due to sudden flameout of the mechanical equipment in dangerous occasions such as ramps, the mechanical equipment generally adopts a normally closed belt brake device. Normally closed band brakes are normally supplied with an initial braking force by a compression spring and are normally operated manually by a hand wheel screw or a hydraulic jack to overcome the force of the compression spring when emergency release of the brake is required. The invention discloses a Chinese patent with an authorization publication number of CN100402406C, and discloses a normal-close and normal-open dual-function brake device for a crane, which comprises a brake drum, a brake belt I, a pin shaft, a crank arm, a spring, an oil cylinder and the like, wherein the brake force is provided by the spring, the brake is relieved by overcoming the acting force of the spring by the oil cylinder, and the structure can realize both a normal-close function and a normal-open function.

The specific pressure of the braking band needs to satisfy: p2 × Fmax/(D.B) ≦ P, wherein: p is specific pressure; f, the variable tension of the brake belt is in the range from the minimum tension F2 to the maximum tension F1 of the brake belt; d is the brake drum diameter; b-width of brake band; [ P ] -allowable specific pressure. From the above formula, it can be seen that the diameter of the brake drum and the braking force need to satisfy a certain range subject to the specific pressure, and in order to obtain a larger braking force, the specific pressure requirement can be satisfied by increasing the diameter D of the brake drum or increasing the width B of the brake band. Because the too wide band width will be unfavorable for brake band and brake drum to closely laminate, also do not favorable to the heat dissipation of friction pair, consequently current belt brake equipment generally can not satisfy the requirement of specific pressure through increase brake band width B, but satisfies the requirement of specific pressure through increase brake drum diameter to lead to the structure huge, need occupy great installation space. In order to provide sufficient braking torque for a belt brake device for a rack-and-pinion vehicle to meet the braking requirement on an oversized slope, a double-brake-belt structure is required. In this case, since it is necessary to consider the problem of the braking force balance of the double brake band structure, it is necessary to develop a braking force balance mechanism for a rack rail vehicle.

Disclosure of Invention

The invention provides a braking force balance mechanism for a rack rail vehicle, aiming at solving the problem of braking force balance of a double-brake-belt structure in the background technology.

A braking force balance mechanism for a rack rail vehicle comprises a lever arm, a spring, a brake rod and a brake belt, and further comprises two braking force balance mechanisms, wherein the two springs, the two brake rods and the two brake belts are arranged; the braking force balance mechanism comprises a joint seat and a joint rod; one end of the joint seat is hinged with one end of the lever arm, and the other end of the joint seat is hinged with the middle part of the joint rod; two ends of the joint rod are respectively connected with one ends of the two springs; two ends of the joint rod are respectively and rotatably connected with one end of each of the two brake rods, and the two brake belts are respectively connected with the other ends of the two brake rods.

Therefore, the invention provides the braking force required by braking through two groups of springs, amplifies, transmits and outputs the braking force through two brake rods and two brake belts, and ensures the balanced output of the braking force of two groups of braking force amplification executing mechanisms (double springs, double brake rods and double brake belts) by matching with the braking force balancing mechanism. The brake force balancing mechanism is arranged between the spring and the lever arm, when the spring tension at two ends of the joint rod is unbalanced, the joint rod rotates around the hinged piece in the middle of the joint rod, so that the balance of the output force of the spring is realized, meanwhile, the brake rod is also linked to realize the balanced transmission and output of the brake force, the equal clearance of the brake pad when the brake is released is ensured, and the structure is compact and is suitable for the limited installation space of the train walking part. On the other hand, when the brake pad gap is not uniform, the balance component can perform uniform adjustment of the brake pad gap under the action of the tension of the spring.

Preferably, first through holes are formed in the two ends of the joint rod along the length direction of the springs, adjusting screws are arranged in the first through holes, and one ends of the two springs are respectively connected with the two ends of the joint rod through the adjusting screws. The adjustment of the output of the spring braking force can be realized by adjusting the screw rod.

Preferably, two ends of the joint rod are respectively provided with a square sleeve, the square sleeve is provided with a second through hole matched with the first through hole, one end of the adjusting screw rod is arranged in the first through hole and the second through hole, and the other end of the adjusting screw rod is connected with one end of the spring.

Based on the same inventive concept, the invention also provides a belt type brake device provided with the braking force balance mechanism for the rack rail vehicle, which comprises the braking force balance mechanism for the rack rail vehicle and a brake drum, wherein two brake belts are sleeved on the brake drum in parallel.

Therefore, the method for reducing the specific pressure by increasing the diameter of the brake drum in the traditional belt brake device is abandoned, the width B of the brake belt is increased by arranging two brake belts in parallel, the specific pressure is reduced, the requirement of large braking force of a vehicle on an oversized ramp is met, too large installation space is not occupied, and the occupied volume of the whole belt brake device is reduced. On the other hand, because two brake belts are arranged, the brake belts are not easy to be tightly attached to the brake drum due to the fact that the width of a single belt is too wide, and heat dissipation of the friction pair is not influenced.

Preferably, the other end of each brake lever is provided with a crank arm, the middle part of each crank arm is fixedly connected with the other end of each brake lever, and two ends of each crank arm are respectively connected with two ends of the corresponding brake band.

Preferably, the bogie comprises a bogie framework, wherein the bogie framework comprises a mounting plate and a mounting support, and a first hinge hole and a second hinge hole are formed in the mounting support; the other end of the spring is fixedly arranged on the mounting plate; the end part of the lever arm close to the joint seat is provided with a first rotating pair, the joint of the crank arm and the other end of the brake rod is provided with a second rotating pair, the first rotating pair is rotatably connected with the first hinge hole, and the second rotating pair is rotatably connected with the second hinge hole.

The installation space of the railway vehicle is extremely limited, the diameter of the brake drum is limited, and the requirement on the specific pressure cannot be met by a method of increasing the diameter of the brake drum.

Preferably, the brake device further comprises a release brake cylinder, one end of the release brake cylinder is hinged with the other end of the lever arm, and the other end of the release brake cylinder is installed on the installation plate. The release brake cylinder is used for realizing brake release.

Compared with the prior art, the invention provides the braking force required by braking through two groups of springs, amplifies, transmits and outputs the braking force through two braking rods and two braking belts, and ensures the balanced output of the braking force of two groups of braking force amplification executing mechanisms (double springs, double braking rods and double braking belts) by matching with the braking force balancing mechanism. The brake force balancing mechanism is arranged between the spring and the lever arm, when the spring tension at two ends of the joint rod is unbalanced, the joint rod rotates around the hinged piece in the middle of the joint rod, so that the balance of the output force of the spring is realized, meanwhile, the brake rod is also linked to realize the balanced transmission and output of the brake force, the equal clearance of the brake pad when the brake is released is ensured, and the structure is compact and is suitable for the limited installation space of the train walking part. On the other hand, when the brake pad gap is not uniform, the balance component can perform uniform adjustment of the brake pad gap under the action of the tension of the spring.

Drawings

Fig. 1 is a schematic structural diagram of a braking force balancing mechanism for a rack-and-pinion vehicle according to the present invention;

FIG. 2 is a side view of FIG. 1;

FIG. 3 is a schematic structural diagram of a braking force balancing mechanism of the present invention;

FIG. 4 is a top view of FIG. 3;

FIG. 5 is a cross-sectional view A-A of FIG. 4;

FIG. 6 is a schematic structural diagram of the joint base of the present invention;

FIG. 7 is a cross-sectional view B-B of FIG. 6;

FIG. 8 is a schematic structural view of an articulated arm according to the invention;

FIG. 9 is a cross-sectional view C-C of FIG. 8;

FIG. 10 is a schematic structural view of the square sleeve of the present invention;

FIG. 11 is a cross-sectional view D-D of FIG. 10;

fig. 12 is a schematic structural view of a band brake apparatus equipped with a braking force balancing mechanism of the present invention.

Detailed Description

The present invention is described in further detail below with reference to the attached drawing figures.

As shown in fig. 1, a braking force balance mechanism for a rack-and-pinion vehicle includes a lever arm 1, two springs 2, two brake levers 3, two brake bands 4, and a braking force balance mechanism 5. As shown in fig. 1 and 3, the braking force balancing mechanism 5 includes a joint base 51 and a joint rod 52; one end of the joint seat 51 is hinged with one end of the lever arm 1 through a hinge 511, and the other end is hinged with the middle part of the joint rod 52 through a vertical hinge 512. As shown in fig. 1, both ends of the joint rod 52 are respectively connected to one ends of the two springs 2, and both ends of the joint rod 52 are respectively rotatably connected to one ends of the two brake levers 3. As shown in fig. 1 and 2, a crank arm 31 is provided at the other end of the brake lever 3, the middle of the crank arm 31 is fixedly connected to the other end of the brake lever 3, and both ends of the crank arm 31 are respectively connected to both ends corresponding to the brake band 4.

As shown in fig. 1, fig. 3, fig. 6 and fig. 7, the joint seat 51 is formed by oppositely connecting two T-shaped seat bodies, a through hole is formed in the middle of the two seat bodies, and a bolt passes through the through hole to fixedly connect the two seat bodies to form the joint seat 51. One end of the seat body is provided with a through hole, and the hinge piece 511 is matched with the through hole, so that one end of the joint seat 51 is hinged with one end of the lever arm 1; the other end of the seat body is provided with a blind hole, and the vertical hinge element 512 is matched with the blind hole, so that the other end of the joint seat 51 is hinged with the middle part of the joint rod 52.

As shown in fig. 1, 3, 8 and 9, both ends of the joint rod 52 are provided with first through holes 521 along the length direction of the spring 3, both ends of the joint rod 52 are further sleeved with square sleeves 522, and the square sleeves 522 are provided with second through holes 523 matched with the first through holes 521. As shown in fig. 1 and 2, one end of the adjusting screw 53 is installed in the first through hole and the second through hole, and the other end is connected to one end of the spring 2.

As shown in fig. 1 and 12, a belt brake device equipped with the above-described brake force balancing mechanism for a rack-and-pinion vehicle includes the above-described brake force balancing mechanism for a rack-and-pinion vehicle, a brake drum 6, a release cylinder 7, and a bogie frame; the two brake belts 4 are sleeved on the brake drum 6 in parallel; the bogie framework comprises a mounting plate 81 and a mounting support 82, the other end of the spring 2 is fixedly mounted on the mounting plate 81, one end of the release brake cylinder 7 is hinged with the other end of the lever arm 1, and the other end of the release brake cylinder is fixedly mounted on the mounting plate 81. A first hinge hole 821 and a second hinge hole 822 are formed in the mounting support 82; a first rotating pair is arranged at the end part of the lever arm 1 close to the joint seat 51, a second rotating pair is arranged at the joint of the crank arm 31 and the other end of the brake lever 1, the first rotating pair is rotatably connected with the first hinge hole 821, and the second rotating pair is rotatably connected with the second hinge hole 822.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.