A safety brake device with adaptive friction

Abstract

The present invention provides an adaptive friction safety brake device, comprising a caliper body having a longitudinally extending guide rail channel for passage of an elevator guide rail; the caliper body having mounting recesses on either side of the guide rail channel for mounting a friction member and a lifting member, respectively; the mounting recesses for the friction member being provided with a cantilevered elastic member, one end of the cantilevered elastic member being fixed to the caliper body and the other end being suspended in the air; the cantilevered elastic member and the friction member being sequentially distributed along the longitudinal direction of the caliper body; when the lifting member moves upward or downward, the friction member contacts and rubs against the elevator guide rail, and the friction member moves along the caliper body until it abuts against the cantilevered elastic member, whereupon the cantilevered elastic member applies positive pressure to the friction member toward the elevator guide rail. The present invention achieves automatic adaptation to changes in friction and wear by feeding back the elastic force based on the magnitude of the braking force.

Description

Technical Field

[0001] The invention belongs to the technical field of elevator components, and in particular relates to an adaptive friction safety brake device. Background Art

[0002] Safety brake devices, such as safety pliers, are shipped with a pre-set elastic member compression (or guide rail positive pressure). However, in actual use, the characteristics and surface conditions of the mating members vary, resulting in significant fluctuations in braking force and presenting certain risks. Currently, most systems ensure consistent braking force through strict control of guide rail and lubricant matching and surface conditions. Functional implementation requires strict control throughout the entire process to ensure reliability. During braking, as friction and wear increase, the positive pressure of the elastic member decreases, resulting in insufficient braking force and an inability to automatically adjust to changes in friction between the friction member and the elevator guide rail, or to compensate for wear on the friction member. Summary of the Invention

[0003] Based on the above-mentioned shortcomings and deficiencies in the prior art, one of the objects of the present invention is to at least solve one or more of the above-mentioned problems in the prior art. In other words, one of the objects of the present invention is to provide an adaptive friction safety braking device that meets one or more of the above-mentioned requirements.

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

[0005] An adaptive friction safety brake device includes a caliper body, the caliper body has a longitudinal guide rail channel, the guide rail channel is used for the elevator guide rail to pass through; the caliper body has mounting recesses located on both sides of the guide rail channel, respectively, for respectively mounting a friction member and a lifting member, and is characterized in that the mounting recess with the friction member is provided with a cantilever elastic member, one end of the cantilever elastic member is fixed to the caliper body, and the other end is suspended in the air; the cantilever elastic member and the friction member are distributed in sequence along the longitudinal direction of the caliper body; when the lifting member moves upward or downward, the friction member contacts and rubs with the elevator guide rail, and the friction member moves along the caliper body until it abuts against the cantilever elastic member, and positive pressure toward the elevator guide rail is applied to the friction member through the cantilever elastic member.

[0006] As a preferred embodiment, a slideway is provided on the inner wall of the mounting recess provided with the friction member. The slideway extends longitudinally along the caliper body, with a first end thereof being away from the guide rail channel and adjacent to the cantilever elastic member, and a second end thereof being inclined and extending at a set angle toward the guide rail channel. The slideway and the caliper body are integrally formed or are separate structures fixed to each other.

[0007] The inclination angle of the slideway is the same as the inclination angle of the movable guide surface of the lifting member.

[0008] As a preferred solution, the safety brake device is a bidirectional safety clamp structure. Accordingly, there are two cantilever elastic members and two slideways, which are symmetrically distributed along the longitudinal direction of the clamp body.

[0009] As a preferred solution, a steel ball is provided between the friction member and the slideway; and / or a rolling ball is provided between the cantilever elastic member and the friction member, and the rolling ball is clearance-fitted with the cantilever elastic member or the friction member.

[0010] As a preferred solution, the mounting recess of the lifting member is provided with a cantilever elastic member, one end of the cantilever elastic member is fixed to the pliers body, and the other end is suspended in the air; the cantilever elastic member and the lifting member are distributed in sequence along the longitudinal direction of the pliers body; when the lifting member moves upward or downward to the braking position, the lifting member presses against the cantilever elastic member.

[0011] As a preferred solution, a limit adjustment bolt is provided on the caliper body corresponding to the cantilever elastic member, which is used to limit the deformation of the cantilever elastic member and to adjust the deformation limit.

[0012] As a preferred solution, the mounting recess where the friction member is provided is provided with a reset mechanism for movable reset of the friction member.

[0013] As a preferred solution, the reset mechanism includes a reset push rod and a reset spring. Accordingly, the caliper body has an avoidance hole for the reset push rod to move; when the friction part moves along the caliper body to abut the cantilever elastic part, the friction part links the reset push rod to move along the avoidance hole to compress the reset spring.

[0014] As a preferred solution, the caliper body is provided with a friction member cover plate corresponding to the mounting recess where the friction member is provided, and the friction member cover plate is provided with a limiting guide groove; correspondingly, the friction member is provided with a limiting column, which passes through the limiting groove for limiting guide cooperation.

[0015] As a preferred solution, the lifting member is a roller, and the mounting recess of the lifting member is provided with a raceway cooperating with the roller, and the raceway and the clamp body are a split structure fixed to each other.

[0016] As a preferred solution, the lifting member is a wedge structure.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The self-adaptive friction safety brake device of the present invention achieves automatic adaptation to friction coefficient changes and wear compensation by feeding back the elastic force of the cantilever elastic member by the magnitude of the braking force. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 1 is a schematic structural diagram of an adaptive friction safety brake device according to embodiment 1 of the present invention;

[0020] Figure 2 1 is a schematic structural diagram of a clamp body according to embodiment 1 of the present invention;

[0021] Figure 3 Schematic diagram of the internal structure of the adaptive friction safety brake device according to Example 1 of the present invention;

[0022] Figure 4 Schematic diagram of the internal structure of the adaptive friction safety brake device according to Example 1 of the present invention;

[0023] Figure 5 1 is a schematic structural diagram of an elastic cantilever according to Example 1 of the present invention;

[0024] Figure 6 2 is a schematic structural diagram of an adaptive friction safety brake device according to embodiment 2 of the present invention;

[0025] Figure 7 2 is a schematic diagram of the internal structure of the adaptive friction safety brake device according to Example 2 of the present invention; DETAILED DESCRIPTION

[0026] To more clearly illustrate the embodiments of the present invention, specific embodiments of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings and other embodiments can be obtained based on these drawings without inventive efforts.

[0027] Example 1:

[0028] like Figure 1-5 As shown, the adaptive friction safety brake device of this embodiment is a bidirectional safety clamp structure, comprising a clamp body 1 having a longitudinally penetrating guide rail channel 10 for the elevator guide rail to pass through.

[0029] The caliper body 1 has a left mounting recess 1-1 and a right mounting recess 1-2, respectively located on either side of the guide rail channel, for mounting a friction member 2 and a lifting member 3, respectively. Upper and lower cantilever elastic members 4a and 4b are also provided, respectively, above and below the mounting recess for the friction member 2, i.e., the left mounting recess 1-1. The installation of the upper cantilever elastic member 4a will be used as an example for detailed description. The mounting structures of the lower cantilever elastic member 4b and the upper cantilever elastic member 4a are symmetrical and will not be further described here.

[0030] Specifically, the upper cantilever elastic member 4a is a long leaf spring structure, and the upper surface of the left end of the upper cantilever elastic member 4a is an upward-curved arc structure A. A slide seat 5 is fixedly mounted on the left side wall of the left mounting recess 1-1. The right surface of the slide seat 5 has an upper slide and a lower slide that are symmetrical with each other, both of which are concave spherical structures. The left end of the upper cantilever elastic member 4a is embedded in the clamping space formed by the left mounting recess 1-1 of the caliper body and the top of the slide seat 5. The left end of the upper cantilever elastic member 4a is supported from left to right by a set screw I fixed to the caliper body. The top wall of the clamping space is a downward-inclined arc structure that matches the upward-curved arc structure A, thereby achieving clamping and limiting the movement of the upper cantilever elastic member 4a in the left and right directions. The slide seat 5 and the caliper body 1 adopt a split structural design, which facilitates the processing of the caliper body and the slide structure and reduces the processing difficulty.

[0031] The upper cantilever elastic member 4a of this embodiment extends to the right above the friction member 2 and is suspended in the air. The upper cantilever elastic member 4a and the friction member 2 are distributed in the longitudinal direction of the caliper body 1 in sequence. Specifically, the upper cantilever elastic member 4a and the lower cantilever elastic member 4b are respectively located on the upper and lower sides of the friction member 2 and are matched with a preset clearance.

[0032] Furthermore, the upper and lower slides are vertically symmetrical. The upper slide is used as an example for detailed description. The upper slide extends longitudinally along the caliper body 1, with its upper end separated from the guide rail channel 10 and adjacent to the upper cantilever elastic member 4a, and its lower end extending obliquely toward the guide rail channel. As the friction member 2 moves upward, it also moves leftward. A steel ball 6 is positioned between the friction member 2 and the upper and lower slides, respectively. The ball is partially embedded in the left side of the friction member 2 and held in place by a pressure cap 7 secured to the friction member 2 to prevent it from falling out.

[0033] In this embodiment, a ball 8 is installed between the upper cantilever elastic member 4a and the lower cantilever elastic member 4b, respectively, and the top and bottom of the friction member. The ball 8 is partially embedded in the top or bottom of the friction member 2 and is held in place by a gland fixed to the friction member 2 to prevent it from falling out. The ball 8 is loosely fitted with the upper cantilever elastic member 4a or the lower cantilever elastic member 4b. The lower surface of the upper cantilever elastic member 4a and the upper surface of the lower cantilever elastic member 4b each have a concave spherical slideway.

[0034] The left mounting recess 1-1 of this embodiment also features a reset mechanism for resetting the friction member 2's braking motion. Specifically, the reset mechanism is mounted in the center of the slideway seat 5 and includes a reset push rod 9a and a reset spring 9b. Accordingly, the caliper body 1 and slideway seat 5 define a clearance hole 11 for the reset push rod 9a. When the friction member 2 moves along the caliper body 1 until it abuts the upper or lower elastic cantilever, the friction member 2, in conjunction with the reset push rod 9a, moves along the clearance hole, compressing the reset spring 9b. The left side of the friction member 2 is V-shaped, enabling the friction member 2 to reset when it moves upward or downward.

[0035] The lifting member 3 of this embodiment is a roller, and a mounting recess for the lifting member is provided, namely, the right mounting recess 1-2 is provided with an upper raceway 3-1 and a lower raceway 3-2 that cooperate with the roller 3. The upper raceway 3-1 and the lower raceway 3-2 are symmetrical with each other in the upper and lower directions, and are a split structure fixed to the caliper body, which facilitates the structural processing of the raceway and the caliper body and reduces the processing difficulty. In addition, a gasket P is provided between the upper raceway 3-1 and the top wall of the right mounting recess 1-2, and the gasket P is fixed between the upper raceway 3-1 and the caliper body 1 by a screw L. The braking parameters can be adjusted by adjusting the number of gaskets; a gasket is also provided between the lower raceway 3-1 and the bottom wall of the right mounting recess 1-2, that is, a corresponding structural design is made as above. Among them, the inclination angles of the upper and lower slides are the same as the inclination angles of the movable guide surfaces of the upper and lower raceways 3-1 and 3-2, thereby ensuring adaptive friction force feedback.

[0036] In addition, the caliper body of this embodiment is fixedly mounted with a friction member cover plate D1 and a lifting member cover plate D2 corresponding to the left and right mounting recesses 1-1 and 1-2, respectively. The friction member cover plate D1 has a retaining groove D11; correspondingly, the friction member 2 is provided with a retaining post 20, which extends through the retaining groove D11 to engage and limit the movement of the friction member 2. Furthermore, the lifting member cover plate D2 has a V-shaped lifting groove D21, and the lifting arm of the roller extends beyond the V-shaped lifting groove, enabling bidirectional lifting.

[0037] The caliper body of this embodiment is respectively provided with an upper limit adjustment bolt X1 and a lower limit adjustment bolt X2 corresponding to the upper cantilever elastic member 4a and the lower cantilever elastic member 4b, which are respectively used to limit the deformation amount of the corresponding cantilever elastic member and adjust the deformation amount.

[0038] In the adaptive friction safety brake device of this embodiment, when the friction member contacts and rubs against the elevator guide rail, the friction member moves along the caliper body until it abuts against the elastic cantilever, and the elastic cantilever applies positive pressure to the friction member toward the elevator guide rail. Since the force point of the elastic cantilever is constantly changing, the elastic force of the elastic cantilever is fed back through the magnitude of the braking force, thereby achieving automatic adaptation to changes in the friction coefficient and wear compensation.

[0039] Example 2:

[0040] The adaptive friction safety brake device of this embodiment is different from that of embodiment 1 in that:

[0041] like Figure 6 and 7As shown, the upper and lower balls are not embedded in the top or bottom of the friction member, but are installed between the caliper body and the friction member cover plate via a retainer K. The friction member cover plate has a movable groove D12 for the retainer to move. Correspondingly, the top and bottom of the friction member each have a concave spherical slideway to accommodate the balls. In addition, the upper and lower raceways of the right mounting recess are integrated with the caliper body, achieving structural diversity to meet the needs of different applications.

[0042] For other structures, please refer to Example 1.

[0043] Example 3:

[0044] The adaptive friction safety brake device of this embodiment is different from that of Embodiment 1 or 2 in that:

[0045] Only one direction of safety brake is retained, and it can be used as a one-way safety clamp to meet the needs of different applications;

[0046] For the specific structure, please refer to Examples 1 and 2.

[0047] Example 4

[0048] The adaptive friction safety brake device of this embodiment is different from that of embodiment 1 in that:

[0049] The lifting parts adopt wedge blocks to meet the needs of different applications;

[0050] The specific structure can be referred to Example 1.

[0051] Example 5:

[0052] The adaptive friction safety brake device of this embodiment is different from that of embodiment 1 in that:

[0053] The mounting recess provided with the lifting member may also be provided with a cantilever elastic member, one end of the cantilever elastic member being fixed to the caliper body and the other end being suspended in the air; the cantilever elastic member and the lifting member being sequentially distributed along the longitudinal direction of the caliper body; when the lifting member moves upward or downward to the braking position, the lifting member abuts against the cantilever elastic member; the specific mounting structure may refer to the cantilever elastic member corresponding to the friction member, to meet the needs of different applications;

[0054] The specific structure can be referred to Example 1.

[0055] The above description is only a detailed description of the preferred embodiments and principles of the present invention. For ordinary technicians in this field, based on the ideas provided by the present invention, there may be changes in the specific implementation methods, and these changes should also be considered as the scope of protection of the present invention.

Claims

1. An adaptive friction safety brake device, comprising a caliper body having a longitudinally extending guide rail channel for passage of an elevator guide rail; the caliper body having mounting recesses located on either side of the guide rail channel for mounting a friction member and a lifting member, respectively, characterized in that: A cantilever elastic part is provided in the mounting recess where the friction part is provided, one end of the cantilever elastic part is fixed to the caliper body and the other end is suspended in the air; the cantilever elastic part and the friction part are distributed in sequence along the longitudinal direction of the caliper body; when the pulling part moves upward or downward, the friction part contacts and rubs against the elevator guide rail, and the friction part moves along the caliper body until it rests against the cantilever elastic part, and positive pressure toward the elevator guide rail is applied to the friction part through the cantilever elastic part.

2. The adaptive friction safety brake device according to claim 1, characterized in that: A slideway is provided on the inner wall of the mounting recess provided with the friction member. The slideway extends longitudinally along the caliper body, with a first end thereof being away from the guide rail channel and adjacent to the cantilever elastic member, and a second end thereof being inclined and extending at a set angle toward the guide rail channel. The slideway and the caliper body are integrally formed or are separate structures fixed to each other. The inclination angle of the slideway is the same as the inclination angle of the movable guide surface of the lifting member.

3. The adaptive friction safety brake device according to claim 2, characterized in that: The safety brake device is a bidirectional safety clamp structure. Accordingly, there are two cantilever elastic members and two slideways, which are symmetrically distributed along the longitudinal direction of the clamp body.

4. An adaptive friction safety brake device according to claim 2 or 3, characterized in that: A steel ball is provided between the friction member and the slideway; and / or a rolling ball is provided between the cantilever elastic member and the friction member, and the rolling ball is in clearance fit with the cantilever elastic member or the friction member.

5. The adaptive friction safety brake device according to claim 1, characterized in that: A cantilever elastic part is provided in the mounting recess where the lifting part is provided, one end of the cantilever elastic part is fixed to the pliers body and the other end is suspended in the air; the cantilever elastic part and the lifting part are distributed in sequence along the longitudinal direction of the pliers body; when the lifting part moves upward or downward to the braking position, the lifting part presses against the cantilever elastic part.

6. An adaptive friction safety brake device according to claim 1 or 5, characterized in that: A limit adjustment bolt is provided on the clamp body corresponding to the cantilever elastic member, which is used for limiting the deformation of the cantilever elastic member and for limiting the deformation adjustment.

7. The adaptive friction safety brake device according to any one of claims 1 to 3, characterized in that: The mounting recess where the friction piece is provided is provided with a reset mechanism for movable reset of the friction piece.

8. The adaptive friction safety brake device according to claim 7, characterized in that: The reset mechanism includes a reset push rod and a reset spring. Accordingly, the caliper body has an avoidance hole for the reset push rod to move; when the friction member moves along the caliper body to abut against the cantilever elastic member, the friction member links the reset push rod to move along the avoidance hole to compress the reset spring.

9. The adaptive friction safety brake device according to any one of claims 1 to 3, characterized in that: The caliper body is provided with a friction member cover plate corresponding to the mounting recess provided with the friction member, and the friction member cover plate is provided with a limiting guide groove; correspondingly, the friction member is provided with a limiting column, and the limiting column passes through the limiting groove for limiting and guiding cooperation.

10. The adaptive friction safety brake device according to any one of claims 1 to 3, characterized in that: The lifting member is a roller, and the mounting recess of the lifting member is provided with a rolling track matched with the roller, and the rolling track and the clamp body are a split structure fixed to each other.

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