Elevator car speed detection device

Abstract

The utility model discloses an elevator car speed detection device, including a base; a traction machine fixedly mounted on the base; a traction wheel connected to the output shaft of the traction machine; a car that can be lifted and lowered in the elevator shaft; a guide wheel system arranged on the transmission path between the traction wheel and the car; a first detection mechanism arranged on the base, including: a first gear sleeved on the output shaft of the traction wheel, a first rotating shaft rotatably arranged on the base, an encoder gear sleeved on the first rotating shaft, an intermediate gear assembly located in the load path between the first gear and the encoder gear, and an angular velocity sensor configured to detect the rotation of the encoder gear. The present application utilizes the characteristic of gear meshing having a stable speed ratio, and the running speed of the car can be known by detecting the rotation speed of the encoder gear. Compared with the prior art, there is no slippage phenomenon, and the speed detection is more accurate.

Description

Technical Field

[0001] The utility model relates to the field of special equipment technology, in particular to an elevator car speed detection device. Background Art

[0002] When the elevator is in use, considering the safety of the elevator operation, it is necessary to detect the elevator speed to ensure that the speed of the elevator is always in an appropriate range and has stable safety;

[0003] The commonly used detection method is to set a roller on the top of the car to rotate in contact with the steel guide rail set in the elevator shaft, and then use an encoder to detect the rotation speed of the roller to obtain the running speed of the elevator car. However, the power is transmitted between the roller and the guide rail through contact rolling friction. The power transmission between the two is unstable, there is a possibility of roller slippage, and the speed detection is likely to be distorted. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes an elevator car speed detection device.

[0005] The technical solution adopted by an embodiment of the utility model to solve its technical problem is:

[0006] Provided is an elevator car speed detection device, comprising:

[0007] A base, arranged in the upper space of the elevator shaft;

[0008] A traction machine, fixedly mounted on the base;

[0009] a traction sheave connected to the output shaft of the traction machine and configured to be directly driven by the output shaft of the traction machine;

[0010] A car, which can be raised and lowered and is arranged in the elevator shaft;

[0011] A guide wheel system, arranged on a transmission path between the traction wheel and the car;

[0012] A traction rope is wound between the traction wheel, the guide wheel system and the car;

[0013] The first detection mechanism is arranged on the base and includes:

[0014] A first gear, sleeved on the output shaft of the traction wheel and configured to rotate synchronously with the output shaft of the traction machine;

[0015] A first rotating shaft is rotatably disposed on the base and is located on one side of the output shaft of the traction machine;

[0016] An encoder gear, sleeved on the first rotating shaft and configured to rotate synchronously with the first rotating shaft;

[0017] an intermediate gear assembly located in a load path between the first gear and the encoder gear and configured to transfer torque of the first gear to the encoder gear;

[0018] An angular velocity sensor is configured to detect rotation of the encoder gear.

[0019] Furthermore, the first detection mechanism also includes:

[0020] A sensor bracket is arranged on the base, the angular velocity sensor is mounted on the sensor bracket, and when the angular velocity sensor is mounted on the sensor bracket, the angular velocity sensor is directly opposite to the encoder gear;

[0021] The circuit board is arranged on the sensor bracket and is electrically connected to the angular velocity sensor.

[0022] Furthermore, the output shaft of the traction machine has a gear assembly shaft section with a polygonal cross-section shape, the first gear has a polygonal inner hole matching the gear assembly shaft section, and the first gear can be sleeved on the gear assembly shaft section through the polygonal inner hole.

[0023] Furthermore, the gear assembly shaft section is arranged at a terminal end of the output shaft of the traction machine which is farther away from the traction sheave.

[0024] Furthermore, the first detection mechanism also includes a rotating component, which is threadedly connected to the end of the output shaft that is farther away from the traction machine relative to the gear assembly shaft section, and when the rotating component is assembled to the end of the output shaft, the end face of the rotating component facing the first gear abuts against the first gear.

[0025] Further, the intermediate gear assembly includes at least one intermediate reduction gear.

[0026] Furthermore, the guide gear train comprises:

[0027] A first guide wheel, rotatably disposed on the base;

[0028] A first anti-ropes pulley, rotatably disposed on the top of the car;

[0029] The second deflector pulley is rotatably arranged on the top of the car, and when observed along the vertical direction of the elevator shaft, the first deflector pulley and the second deflector pulley are respectively arranged on both sides of the first guide wheel, the traction rope is sequentially wound between the traction wheel, the first deflector pulley, the first guide wheel, and the second deflector pulley, and one end of the traction rope is connected to the base.

[0030] Furthermore, at least one second detection mechanism is included, which is arranged on the top of the car and is configured to retrieve the rotation speed of the first deflection pulley or the second deflection pulley.

[0031] The beneficial effects of the utility model are as follows: by arranging the first gear, the intermediate gear assembly, the encoder gear and the angular velocity sensor, the rotational speed of the traction machine output shaft (i.e. the rotational speed of the traction wheel) can be synchronized with the first gear, and transmitted to the encoder gear through the intermediate gear assembly. By utilizing the characteristic of the gear meshing with a stable speed ratio, the rotational speed of the traction wheel can be known by detecting the rotational speed of the encoder gear, that is, the running speed of the car can be obtained. Compared with the prior art, the direct rolling connection between the roller and the guide rail is utilized, there is no slipping phenomenon, and the speed detection is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0033] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0034] Figure 2 This is a schematic structural diagram of the traction machine, traction wheel, first gear, and rotating component of an embodiment of the present application;

[0035] Figure 3 This is a schematic diagram of the transmission structure of the first detection mechanism of the embodiment of the present application;

[0036] Figure 4 This is a schematic diagram of the positions of the sensor bracket, angular velocity sensor and encoder gear of the first detection mechanism of the embodiment of the present application;

[0037] Figure 5 It is a side view of the output shaft, traction wheel and first gear of the traction machine according to the embodiment of the present application.

[0038] Description of the symbols in the figure:

[0039] 1. Elevator shaft; 11. Base;

[0040] 2. Traction machine; 21. Output shaft; 22. Assembly shaft section;

[0041] 3. Traction sheave;

[0042] 4. Car;

[0043] 5. Guide wheel system; 51. First guide wheel; 52. First anti-rope wheel; 53. Second anti-rope wheel;

[0044] 6. Towing rope;

[0045] 7. First detection mechanism; 71. First gear; 72. First rotating shaft; 73. Encoder gear; 74. Intermediate gear assembly; 75. Angular velocity sensor; 76. Sensor bracket; 77. Rotating member. DETAILED DESCRIPTION

[0046] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0047] In the description of the present utility model, the meaning of "more than" is more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0048] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0049] In the present invention, unless otherwise clearly defined, the words "set", "install", "connect" and the like should be understood in a broad sense, for example, they can be directly connected or indirectly connected through an intermediate medium; they can be fixedly connected or detachably connected or integrally formed; they can be mechanically connected; they can be the internal connection of two elements or the interaction relationship between two elements. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0050] Reference Figures 1 to 5 The utility model provides an elevator car 4 speed detection device, which includes:

[0051] A base 11 is arranged in the upper space of the elevator shaft 1;

[0052] The traction machine 2 is fixedly mounted on the base 11;

[0053] The traction sheave 3 is connected to the output shaft 21 of the traction machine 2 and is configured to be directly driven by the output shaft 21 of the traction machine 2;

[0054] A car 4 is arranged in the elevator shaft 1 and can be raised and lowered;

[0055] A guide wheel system 5 is arranged on a transmission path between the traction wheel 3 and the car 4;

[0056] A traction rope 6 is wound between the traction wheel 3, the guide wheel system 5 and the car 4;

[0057] The first detection mechanism 7 is arranged on the base 11 and includes:

[0058] The first gear 71 is sleeved on the output shaft 21 of the traction wheel 3 and is configured to rotate synchronously with the output shaft 21 of the traction machine 2;

[0059] A first rotating shaft 72 is rotatably disposed on the base 11 and is located on one side of the output shaft 21 of the traction machine 2;

[0060] An encoder gear 73 is sleeved on the first rotating shaft 72 and is configured to rotate synchronously with the first rotating shaft 72;

[0061] an intermediate gear assembly 74 , located in a load path between the first gear 71 and the encoder gear 73 , and configured to transmit the torque of the first gear 71 to the encoder gear 73 ;

[0062] The angular velocity sensor 75 is configured to detect the rotation of the encoder gear 73 .

[0063] In this embodiment, the encoder gear 73 is a gear with an encoder, and the angular velocity sensor 75 can determine the rotation speed of the encoder gear 73 by detecting the position of the encoder on the encoder gear 73, and then obtain the rotation speed of the first gear 71 through the transmission ratio of the intermediate gear assembly 74. Since the traction wheel 3 has the same rotation speed as the first gear 71, the rotation speed of the first gear 71 is the linear speed of the traction rope 6, that is, the running speed of the car 4. Therefore, by detecting the rotation speed of the encoder gear 73, the running speed of the car 4 can be obtained. Compared with the prior art, the direct rolling connection between the roller and the guide rail is used, there is no slippage phenomenon, and the speed detection is more accurate.

[0064] In one embodiment, the first detection mechanism 7 further includes:

[0065] A sensor bracket 76 is disposed on the base 11, and the angular velocity sensor 75 is mounted on the sensor bracket 76. When the angular velocity sensor 75 is mounted on the sensor bracket 76, the angular velocity sensor 75 is directly opposite to the encoder gear 73;

[0066] The circuit board is disposed on the sensor bracket 76 and is electrically connected to the angular velocity sensor 75 .

[0067] In this way, the angular velocity sensor 75 and the sensor bracket 76 can be independent of the first rotating shaft 72 and the encoder gear 73, making the installation of the two more flexible and more adaptable to complex installation environments. In addition, in order to better facilitate the detection of the angular velocity sensor 75, the encoder gear 73 is preferably arranged at the end of the first rotating shaft 72.

[0068] In another embodiment, the output shaft 21 of the traction machine 2 has a gear assembly shaft section 22 with a polygonal cross-sectional shape, and the first gear 71 has a polygonal inner hole matching the gear assembly shaft section 22, and the first gear 71 can be sleeved on the gear assembly shaft section 22 through the polygonal inner hole.

[0069] With such arrangement, when installing the first gear 71 , the first gear 71 can be directly inserted into the gear assembly shaft section 22 , which is quick to install and helps to improve installation efficiency.

[0070] In a further embodiment, the gear assembly shaft section 22 is arranged at the end of the output shaft 21 of the traction machine 2 which is farther away than the traction wheel 3. By arranging the gear assembly shaft section 22 at the end of the output shaft 21 which is farther away than the traction wheel 3 from the traction machine 2, the first gear 71 can be installed after the traction machine 2 and the traction wheel 3 are installed, without considering the installation order of the detection mechanism and the traction machine 2 and the traction wheel 3.

[0071] In addition, the first detection mechanism 7 also includes a rotating component 77, which is threadedly connected to the end of the output shaft 21 that is farther away from the traction machine 2 relative to the gear assembly shaft section 22, and when the rotating component 77 is assembled to the end of the output shaft 21, the end face of the rotating component 77 facing the first gear 71 abuts against the first gear 71.

[0072] With such a design, the first gear 71 can be fixed to the output shaft 21 of the traction machine 2 via the rotating member 77 .

[0073] Furthermore, the intermediate gear assembly 74 includes at least one intermediate reduction gear and at least one second rotating shaft, and the intermediate reduction gear is mounted on the second rotating shaft. The intermediate reduction gear can increase the reduction ratio between the first gear 71 and the encoder gear 73, which is beneficial to the detection of the angular velocity sensor 75.

[0074] In addition, in the present invention, the guide wheel train 5 comprises:

[0075] A first guide wheel 51 is rotatably disposed on the base 11;

[0076] A first anti-ropes pulley 52 is rotatably disposed on the top of the car 4;

[0077] The second deflector pulley 53 is rotatably arranged on the top of the car 4, and when observed along the vertical direction of the elevator shaft 1, the first deflector pulley 52 and the second deflector pulley 53 are respectively arranged on both sides of the first guide wheel 51, and the traction rope 6 is sequentially wound among the traction wheel 3, the first deflector pulley 52, the first guide wheel 51, and the second deflector pulley 53, and one end of the traction rope 6 is connected to the base 11.

[0078] With such a design, the first guide wheel 51, the first deflection wheel 52 and the second deflection wheel 53 can be effectively used to make the above-mentioned wheel train components more compactly distributed in the elevator shaft 1, without deepening the shaft, thus saving construction costs.

[0079] In order to further improve the accuracy of the speed detection of the car 4 and reduce the accidents caused by the failure of the speed detection of the car 4 due to the failure of the encoder or the angular velocity sensor 75, at least one second detection mechanism is also provided. The second detection mechanism is arranged on the top of the car 4 and is constructed to retrieve the rotation speed of the first deflection pulley 52 or the second deflection pulley 53. The structure of the second detection mechanism is substantially the same as that of the first detection mechanism 7. The difference is that the first gear 71 of the second detection mechanism is mounted on the rotating shaft of the first deflection pulley 52 or the second deflection pulley 53. By cooperating with the first detection mechanism 7, the accidents caused by the failure of the speed detection of the car 4 due to the failure of the encoder or the angular velocity sensor 75 in the first detection mechanism 7 or the second detection mechanism can be reduced.

[0080] Of course, the present invention is not limited to the above-mentioned embodiments, and technicians familiar with the field may make equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications and substitutions are all included in the scope defined by the claims of this application.

Claims

1. An elevator car speed detection device, characterized in that: include: A base (11) is arranged in the upper space of the elevator shaft (1); A traction machine (2) is fixedly mounted on the base (11); A traction wheel (3) connected to the output shaft (21) of the traction machine (2) and configured to be directly driven by the output shaft (21) of the traction machine (2); A car (4) is arranged in the elevator shaft (1) and can be raised and lowered; A guide wheel system (5) is arranged on a transmission path between the traction wheel (3) and the car (4); A traction rope (6) is wound between the traction wheel (3), the guide wheel system (5) and the car (4); The first detection mechanism (7) is arranged on the base (11) and comprises: A first gear (71) is sleeved on the output shaft (21) of the traction wheel (3) and is configured to rotate synchronously with the output shaft (21) of the traction machine (2); A first rotating shaft (72) is rotatably disposed on the base (11) and is located on one side of the output shaft (21) of the traction machine (2); An encoder gear (73) is sleeved on the first rotating shaft (72) and is configured to rotate synchronously with the first rotating shaft (72); an intermediate gear assembly (74) located in a load path between the first gear (71) and the encoder gear (73) and configured to transmit torque of the first gear (71) to the encoder gear (73); An angular velocity sensor (75) is configured to detect the rotation of the encoder gear (73).

2. The elevator car speed detection device according to claim 1, characterized in that: The first detection mechanism (7) further comprises: a sensor bracket (76) disposed on the base (11), the angular velocity sensor (75) being mounted on the sensor bracket (76), and when the angular velocity sensor (75) is mounted on the sensor bracket (76), the angular velocity sensor (75) is directly opposite to the encoder gear (73); A circuit board is arranged on the sensor bracket (76) and is electrically connected to the angular velocity sensor (75).

3. The elevator car speed detection device according to claim 2, characterized in that: The output shaft (21) of the traction machine (2) has a gear assembly shaft section (22) with a polygonal cross-sectional shape, and the first gear (71) has a polygonal inner hole matching the gear assembly shaft section (22). The first gear (71) can be sleeved on the gear assembly shaft section (22) through the polygonal inner hole.

4. The elevator car speed detection device according to claim 3, characterized in that: The gear assembly shaft section (22) is arranged at the end of the output shaft (21) of the traction machine (2) which is further away than the traction wheel (3).

5. The elevator car (4) speed detection device according to claim 4, characterized in that: The first detection mechanism (7) further comprises a rotating member (77), the rotating member (77) being threadedly connected to an end of the output shaft (21) which is farther from the traction machine (2) relative to the gear assembly shaft section (22), and when the rotating member (77) is assembled to the end of the output shaft (21), the end face of the rotating member (77) facing the first gear (71) abuts against the first gear (71).

6. The elevator car speed detection device according to claim 1, characterized in that: The intermediate gear assembly (74) includes at least one intermediate reduction gear.

7. The elevator car speed detection device according to claim 1, characterized in that: The guide gear train (5) comprises: A first guide wheel (51) rotatably disposed on the base (11); A first anti-ropes pulley (52) rotatably disposed on the top of the car (4); The second deflecting pulley (53) is rotatably arranged on the top of the car (4), and when viewed along the vertical direction of the elevator shaft (1), the first deflecting pulley (52) and the second deflecting pulley (53) are respectively arranged on both sides of the first guide wheel (51), the traction rope (6) is sequentially wound between the traction wheel (3), the first deflecting pulley (52), the first guide wheel (51), and the second deflecting pulley (53), and one end of the traction rope (6) is connected to the base (11).

8. The elevator car speed detection device according to claim 7, characterized in that: It also includes at least one second detection mechanism, which is arranged on the top of the car (4) and is configured to retrieve the rotation speed of the first deflection pulley (52) or the second deflection pulley (53).

Images