A roller braking mechanism

Abstract

The present invention belongs to the technical field of elevator components, and particularly relates to a roller braking mechanism. The roller is rotatably mounted on a wheel seat. The roller braking mechanism includes a braking ring, a friction member, and a driving mechanism. The braking ring is coaxially and fixedly connected to the roller, and the braking ring is located between the roller and the wheel seat; the friction member is mounted on the wheel seat and is located inside the braking ring; the driving mechanism is used to drive the friction member to move radially along the braking ring so as to be in frictional contact with the braking ring, thereby realizing braking of the roller. The roller braking mechanism of the present invention has high braking reliability by virtue of the structural design of the braking ring and the friction member.

Description

Technical Field

[0001] The present invention belongs to the technical field of elevator components, and particularly relates to a roller braking mechanism. Background Art

[0002] In existing elevator components, such as roller rail clamps, roller guide shoes, etc., the electromagnetic force value of the rotating wheel braking mechanism gradually decreases after braking wear, and there are deficiencies in braking reliability, and the reliability needs to be further improved. Summary of the Invention

[0003] Based on the above deficiencies in the prior art, the object of the present invention is to provide a roller braking mechanism.

[0004] In order to achieve the above object of the invention, the present invention adopts the following technical solutions:

[0005] A roller braking mechanism, the roller is rotatably installed on a wheel seat, and the roller braking mechanism includes a braking ring, a friction member and a driving mechanism. The braking ring is coaxially and fixedly connected to the roller, and the braking ring is located between the roller and the wheel seat;

[0006] The friction member is installed on the wheel seat and is located inside the braking ring;

[0007] The driving mechanism is used to drive the friction member to move radially along the braking ring to frictionally contact the braking ring, so as to realize roller braking.

[0008] As a preferred solution, the driving mechanism includes a driving member, a pressure plate, a guiding pull rod, a triggering member, a wedge block and a return spring. The pressure plate is connected to one end of the guiding pull rod. The guiding pull rod axially penetrates the wheel seat and is in guiding cooperation. The other end of the guiding pull rod is connected to the triggering member. The triggering member is used to trigger the wedge block to move radially and outward along the braking ring. The friction member is arranged on the wedge block; the return spring is used to reset the wedge block moving radially and outward along the braking ring;

[0009] The driving member is installed on the wheel seat and is used to magnetically drive the pressure plate.

[0010] As a preferred solution, the wedge block has a kidney-shaped hole, and the wedge block is limited to the wheel seat by a fixing member passing through the kidney-shaped hole, so that the wedge block can move radially along the braking ring.

[0011] As a preferred solution, the driving member is an electromagnet.

[0012] As a preferred solution, the structure of the friction member is adapted to the inner diameter structure of the braking ring.

[0013] As a preferred solution, the number of the friction members is two, which are respectively located on both sides of the wheel axle; correspondingly, the number of the wedge blocks is two, and there are two return springs. The two ends of the return spring are respectively connected to the two wedge blocks.

[0014] As a preferred solution, the trigger member includes a base frame and rollers installed on both sides of the base frame. The base frame is fixedly connected to the guiding tie rod, and the two rollers are respectively in contact and cooperation with the inclined surfaces of the two wedge blocks.

[0015] As a preferred solution, the trigger member is of a trapezoidal wedge block structure, and its two waist surfaces are respectively in contact and cooperation with the inclined surfaces of the two wedge blocks.

[0016] As a preferred solution, there are two sets of the trigger members, which are respectively located on both sides of the wheel axle; correspondingly, the number of guiding tie rods is two.

[0017] As a preferred solution, the wedge block and the friction member arranged thereon are integrally formed.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] For the roller braking mechanism of the present invention, by means of the structural design of the braking ring and the friction member, the braking reliability is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the roller rail clamp in Embodiment 1 of the present invention;

[0021] Figure 2 is a front view structural diagram of the roller rail clamp in Embodiment 1 of the present invention;

[0022] Figure 3 is Figure 2 a partial view of the sectional view taken along line A-A in

[0023] Figure 4 is a rear view structural diagram (with some structures omitted) of the roller rail clamp in Embodiment 1 of the present invention;

[0024] Figure 5 is a schematic structural diagram of the left roller braking mechanism and the braking ring in Embodiment 1 of the present invention;

[0025] Figure 6 is a schematic structural diagram of the left roller braking mechanism in Embodiment 1 of the present invention;

[0026] Figure 7 is a side view structural diagram of the left roller braking mechanism in Embodiment 1 of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0027] In order to more clearly illustrate the embodiments of the present invention, the specific implementation manners of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings, and other implementation manners can also be obtained.

[0028] Embodiment 1:

[0029] The roller braking mechanism of this embodiment is applied to a roller rail clamp. First, the structure of the roller rail clamp will be described in detail as follows:

[0030] As Figure 1-7 shown, specifically, the roller rail clamp includes an outer frame 1, a left roller 2, a right roller 3, a left wheel seat 4, a right wheel seat 5, a connecting rod 6, a left roller braking mechanism, and a right roller braking mechanism.

[0031] The outer frame 1 of this embodiment includes a frame structure formed by a base 1a, vertical plates 1b on the left and right sides and at the rear, and a top plate 1c. The front side of the base 1a has a guide rail through-hole 100 for the elevator guide rail to pass through.

[0032] The left roller 2 and the right roller 3 of this embodiment are symmetrically distributed on the left and right sides of the guide rail through-hole 100. Specifically, the left roller 2 is rotatably mounted on the left wheel seat 4 through a wheel axle L, and the right roller 3 is rotatably mounted on the right wheel seat 5 through another wheel axle.

[0033] The left wheel seat 4 and the right wheel seat 5 of this embodiment are respectively rotatably mounted on the support seats 7 fixed on the base 1a. Specifically, the left wheel seat 4 and the right wheel seat 5 of this embodiment are both cam structures, and their convex parts are rotatably mounted on the support seats 7.

[0034] The left and right ends of the connecting rod 6 of this embodiment are respectively rotatably connected to the left wheel seat 4 and the right wheel seat 5. The axial direction of the connecting rod 6 is perpendicular to the axial direction of the left roller 2 (or the right roller 3). Among them, the rotation fulcrum of the left wheel seat 4 and the rotation fulcrum of the connecting rod thereon are respectively located on the upper and lower sides of the rotation fulcrum of the corresponding left roller 2, and the rotation fulcrum of the right wheel seat 5 and the rotation fulcrum of the connecting rod thereon are respectively located on the upper and lower sides of the rotation fulcrum of the corresponding right roller 3. Thus, a parallelogram connection structure is formed to achieve follow-up movement when the car is offset without causing a change in frictional resistance.

[0035] In addition, positive pressure adjusting members 8 are respectively provided at both ends of the connecting rod 6 of this embodiment for adjusting the distance between the left roller and the right roller, so as to achieve the effect of adjusting the positive pressure of the roller on the elevator guide rail. Specifically, the positive pressure adjusting member 8 of this embodiment is a nut member, which is threadedly connected to the connecting rod 6, and can conveniently adjust the positive pressure of the roller on the elevator guide rail.

[0036] The roller braking mechanism of this embodiment is used to brake the roller. Specifically, the left roller braking mechanism is used to brake the left roller in the target state, and the right roller braking mechanism is used to brake the right roller in the target state. Since the structure of the left roller braking mechanism is the same as that of the right roller braking mechanism, the specific structure and installation of the left roller braking mechanism will be described in detail here, and the specific structure and installation of the right roller braking mechanism will not be elaborated here.

[0037] The left roller braking mechanism of this embodiment includes a braking ring 9, a friction member 10, and a driving mechanism. The braking ring 9 is coaxially and fixedly connected to the left roller 2, and the braking ring 9 is located between the left roller 2 and its corresponding left wheel seat 4; the friction member 10 is installed on the left wheel seat 4 and is located inside the braking ring 9; the driving mechanism is used to drive the friction member 10 to move radially along the braking ring 9 to be in frictional contact with or in clearance fit with the braking ring 9.

[0038] Specifically, the driving mechanism includes a driving member 11, a pressure plate 12, two guiding tie rods 13, two triggering members 14, two wedges 15, and two return springs 16. The pressure plate 12 is connected to one end of the guiding tie rod 13. The guiding tie rod 13 axially penetrates the left wheel seat 4 and is in guiding fit. The other end of the guiding tie rod 13 is connected to the triggering member 14. The triggering member 14 is used to trigger the two wedges to move radially and outward along the braking ring. The friction member 10 is provided on the wedge, preferably integrally formed; the structure of the friction member 10 is adapted to the inner diameter structure of the braking ring, so that the friction member can contact and friction with the braking ring; wherein, the wedge 15 has a kidney-shaped hole 150 and is fixed on the left wheel seat 4 through a stud K penetrating the kidney-shaped hole, which can not only fix the wedge 15 but also enable the wedge to move radially and outward along the braking ring.

[0039] Among them, the two guiding tie rods 13 are respectively located on the upper and lower sides of the wheel axle L, the two triggering members 14 are respectively located on the upper and lower sides of the wheel axle L, and are in one-to-one driving connection with the two guiding tie rods 13; the two wedges 15 are respectively located on the left and right sides of the wheel axle L; the two return springs are respectively located on the upper and lower sides of the wheel axle L. The two ends of the return spring 16 are respectively connected to the two wedges and are used to reset the wedges moving radially and outward along the braking ring.

[0040] Among them, the driving member 11 of this embodiment is installed on the left wheel seat 4 and is used to magnetically drive the pressure plate 12. The driving member 11 is an electromagnet.

[0041] The triggering member 14 of this embodiment includes a base frame 140 and rollers 141 installed on both sides of the base frame 140. The base frame 140 is fixedly connected to the guiding tie rod 13, and the two rollers 140 are respectively in contact and fit with the inclined surfaces X of the two wedges 15.

[0042] When the roller rail clamp of this embodiment is installed on the elevator car, when the elevator car reaches the target floor, the electromagnet drives the pressure plate, and through the guiding tie rod, the rollers of the triggering member are linked. The rollers link the wedges to move radially and outward along the braking ring, so that the friction member contacts and frictions with the braking ring to achieve roller braking and avoid the shaking of the elevator car. Among them, using the electromagnetic trigger to open the inclined surface of the wedge to lock the roller for braking has wear compensation for the locking torque and improves the reliability. As the friction member wears, the gap between the pressure plate and the electromagnet becomes smaller and smaller, the magnetic attraction force becomes larger and larger, and the braking reliability becomes higher and higher.

[0043] Embodiment 2:

[0044] The difference between the roller braking mechanism of this embodiment and that of Embodiment 1 lies in that:

[0045] The trigger member can also adopt a trapezoidal wedge structure, and both of its two waist surfaces have inclined surfaces, which can realize the triggering of the two wedges and meet the requirements of different applications;

[0046] Other structures can refer to Embodiment 1.

[0047] The above is only a detailed description of the preferred embodiments and principles of the present invention. For those of ordinary skill in the art, according to the idea provided by the present invention, there will be changes in the specific implementation manners, and these changes should also be regarded as the protection scope of the present invention.

Claims

1. A roller braking mechanism, wherein the roller is rotatably mounted on a wheel seat, and is characterized in that, The roller braking mechanism includes a braking ring, a friction member, and a driving mechanism. The braking ring is coaxially and fixedly connected to the roller, and the braking ring is located between the roller and the wheel seat. The friction member is installed on the wheel seat and is located inside the braking ring. The driving mechanism is used to drive the friction member to move radially along the braking ring so as to be in frictional contact with the braking ring to achieve braking of the roller. The driving mechanism includes a driving member, a pressure plate, a guiding pull rod, a triggering member, a wedge block, and a return spring. The pressure plate is connected to one end of the guiding pull rod. The guiding pull rod axially penetrates the wheel seat and is in guiding cooperation. The other end of the guiding pull rod is connected to the triggering member. The triggering member is used to trigger the wedge block to move radially and outward along the braking ring. The friction member is arranged on the wedge block. The return spring is used to reset the wedge block moving radially and outward along the braking ring. The driving member is installed on the wheel seat and is used to magnetically drive the pressure plate.

2. The roller braking mechanism according to claim 1, characterized in that, The wedge block has a waist-shaped hole, and the wedge block is limited to the wheel seat by a fixing member passing through the waist-shaped hole so that the wedge block can move radially along the braking ring.

3. The roller braking mechanism according to claim 1, characterized in that, The driving member is an electromagnet.

4. A roller braking mechanism according to claim 1, characterized in that, The structure of the friction member is adapted to the inner diameter structure of the braking ring.

5. A roller braking mechanism according to claim 1, characterized in that, The number of the friction members is two, which are respectively located on both sides of the wheel axle. Correspondingly, the number of the wedge blocks is two, and there are two return springs. The two ends of the return spring are respectively connected to the two wedge blocks.

6. The roller braking mechanism according to claim 1, wherein The triggering member includes a base frame and rollers installed on both sides of the base frame. The base frame is fixedly connected to the guiding pull rod, and the two rollers are respectively in contact and cooperation with the inclined surfaces of the two wedge blocks.

7. A roller braking mechanism according to claim 1, characterized in that, The triggering member is of a trapezoidal wedge block structure, and its two waist surfaces are respectively in contact and cooperation with the inclined surfaces of the two wedge blocks.

8. A roller braking mechanism according to claim 6 or 7, characterized in that, There are two groups of the triggering members, which are respectively located on both sides of the wheel axle. Correspondingly, the number of the guiding pull rods is two.

9. The roller braking mechanism according to claim 1, characterized in that, The wedge block and the friction member arranged thereon are integrally formed.

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