An anti-drop device for elevator cable

Abstract

The present invention relates to an anti-slip device for elevator cables. It comprises a base plate with a plurality of mounting holes, a left side block is provided on the left side of the front side of the base plate, and a right side block is provided on the right side; an outer groove is provided on the outer side of the right side block, a horizontal sleeve is provided in the center of the outer groove, a moving block is provided at the outer end of the sleeve, a spring is provided between the moving block and the sleeve, and a pressure cover is provided on the outside of the moving block, the inner end of the pressure cover is located in the outer groove and is fixedly connected to the right side block; a limiting groove and a turning groove are provided on the outer end face of the moving block, and it also comprises a camshaft with a limiting section and a turning section, the limiting section is located in the limiting groove, the turning section is located in the turning groove, and the front end of the camshaft passes through a shaft hole provided on the side wall of the pressure cover; it also comprises a support arm located between the left side block and the right side block, and the right end of the support arm is fixedly connected to the front end of the camshaft. The present invention has a simple structure, is easy to install, and works stably and reliably.

Description

Technical Field

[0001] The invention belongs to the technical field of elevator facilities, and in particular relates to an anti-slip device for elevator cables. Background Art

[0002] An elevator is a type of lifting platform facility installed in a wind turbine tower to assist in the lifting and movement of personnel and objects during construction and subsequent maintenance. The elevator car is usually equipped with electrical components such as drive, braking devices, and detection devices. Therefore, during the lifting and movement of the elevator, a cable is usually dragged. The cable usually starts from the ground and extends upward, and finally connects to the elevator car. During the upward movement of the elevator, the end of the cable rises as the position of the car rises, and during this process the main part of the cable spreads out to the side on the vertical path of the elevator; during the downward movement of the elevator, the end of the cable drops as the position of the car drops, and during this process the main part of the cable moves from the side to the middle on the vertical path of the elevator.

[0003] Considering the characteristics of cable movement, an auxiliary anti-slip device for the cable should be installed in the moving space of the elevator or on the vertical passage to fix and release the cable to prevent the cable from getting entangled or colliding with other parts of the elevator or other parts on the moving passage. The above anti-slip device should meet the following requirements: during the upward movement of the elevator, the main part of the cable enters the anti-slip device and is fixed; during the downward movement of the elevator, the main part of the cable can be separated from the anti-slip device. In other words, the anti-slip device should be able to fix the cable without affecting the movement and retraction of the cable.

[0004] In the prior art, a rubber block with a groove is usually used as the above-mentioned anti-slip device. During the upward movement of the elevator, the cable is pushed into the groove of the rubber block by the accompanying lever on the car and fixed. During the downward movement of the elevator, the cable automatically detaches from the groove of the rubber block under the downward pulling force of the car. The anti-slip device of the above-mentioned structure is provided by the plastic deformation ability of the rubber material.

[0005] This type of anti-slip device has the following problems: after long-term use, the rubber material will age, lose elasticity or break easily, resulting in a weakening or loss of the clamping and fixing effect on the cable; on the other hand, the rubber material is prone to wear, resulting in the size of the groove becoming larger and larger, and eventually losing the fixing effect on the cable. Therefore, it is necessary to optimize the structure of the anti-slip device to solve the above problems. Summary of the invention

[0006] In order to solve the technical problems existing in the known technology, the present invention provides an anti-slip device for elevator cables which has a simple structure, is easy to install, and works stably and reliably.

[0007] The technical solution adopted by the present invention to solve the technical problems existing in the known technology is: an anti-slip device for elevator cables includes a base plate with multiple mounting holes, a left side block is provided on the left side of the front side of the base plate, and a right side block is provided on the right side; an outer groove is provided on the outer side of the right side block, a horizontal sleeve is provided in the center of the outer groove, a moving block is provided at the outer end of the sleeve, a spring is provided between the moving block and the sleeve, and a pressure cover is also provided on the outside of the moving block, the inner end of the pressure cover is located in the outer groove and is fixedly connected to the right side block; a limiting groove and a turning groove are provided on the outer end face of the moving block, and also includes a camshaft with a limiting section and a turning section, the limiting section is located in the limiting groove, the turning section is located in the turning groove, and the front end of the camshaft passes through a shaft hole opened on the side wall of the pressure cover; it also includes a support arm located between the left side block and the right side block, and the right end of the support arm is fixedly connected to the front end of the camshaft.

[0008] The advantages and positive effects of the present invention are as follows: the present invention provides an anti-slip device for elevator cables with a simple and reasonable structural design. Compared with the existing anti-slip devices, the anti-slip device is made of metal material as a whole in the present technical solution, which improves the overall structural strength. At the same time, the anti-slip device made of metal material will not cause aging failure and other problems, so it can maintain a reliable state under long-term operation. By setting a plurality of mounting holes on the substrate, the anti-slip device can be quickly installed and fixed to the corresponding position on the elevator platform by a plurality of bolts, and the operation is convenient. By setting a support arm and configuring a tilting control device composed of a camshaft, a spring, a moving block and a pressure cover for the support arm, the anti-slip device has an action mode that matches the moving action of the cable, that is, the support arm can be located between the two states of horizontal stable state and non-horizontal transient state, and has the switching between the two states of anti-slipping of the cable when the elevator car is going up and automatic release of the cable when the elevator is going down, and the operation is stable and reliable.

[0009] Preferably, the moving block is in a stepped shape with a larger outer portion and a smaller inner portion, wherein the inner portion is cylindrical, and the outer end of the spring is sleeved on the outer side of the cylindrical portion.

[0010] Preferably: the limiting groove and the rotating groove of the moving block are horizontally connected, a bayonet is provided in the middle of the front side of the limiting groove, and the rotating groove extends to the rear end face of the moving block; the limiting section of the camshaft is an oblate cylinder, the cross-section of the rotating section is a crescent shape, and the neck of the camshaft falls into the bayonet of the moving block.

[0011] Preferably, the base plate, the left side block and the right side block are integrally cast, the upper and lower corners of the left side block located inside are both arc-shaped transitions, and the upper and lower corners of the right side block located inside are both arc-shaped transitions.

[0012] Preferably, the gland is fixedly connected to the right side block by using a plurality of fastening screws.

[0013] Preferably, the end of the support arm is fixedly connected to the outer end of the camshaft by means of screws.

[0014] Preferably: a plurality of through holes are also provided on the support arm. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention, from a frontal perspective;

[0016] Figure 2 It is a schematic diagram of the structure of the present invention, from a rear side perspective;

[0017] Figure 3 It is a schematic cross-sectional view of the structure of the present invention, in which the section line is not shown;

[0018] Figure 4 It is a schematic diagram of the structure of the camshaft, moving block and spring.

[0019] In the figure: 1. base plate; 2. mounting hole; 3. left side block; 4. right side block; 5. pressure cover; 6. fastening screw; 7. camshaft; 7-1. limit section; 7-2. rotation section; 8. outer groove; 9. through hole; 10. support arm; 11. moving block; 11-1. limit groove; 11-2. rotation groove; 12. spring; 13. sleeve. DETAILED DESCRIPTION

[0020] In order to further understand the content, features and effects of the present invention, the following embodiments are described in detail as follows:

[0021] See also Figure 1 and Figure 2 The anti-drop device for elevator cables of the present invention comprises a base plate 1 with a plurality of mounting holes 2, and a left side block 3 is provided on the left side of the front side of the base plate 1, and a right side block 4 is provided on the right side. The base plate 1 serves as a basis for the anti-drop device to be installed and fixed on the elevator platform facility, and a plurality of bolts are provided in each mounting hole 2 when the anti-drop device is installed and fixed on the platform.

[0022] In this embodiment, the base plate 1, the left side block 3 and the right side block 4 are integrally cast, which can simplify the processing technology and ensure the overall structural strength. Figure 2In the integral casting process, a convex rib can be integrally formed on the back of the base plate 1, which can further improve the structural strength of the base plate 1, and a cavity can be integrally cast inside the left side block 3 and the right side block 4, which helps to save materials and reduce the weight of the entire anti-slip device. It is conceivable that the base plate 1, the left side block 3 and the right side block 4 can also be manufactured by separate processing and then welding.

[0023] During operation, the cable is located in the space between the left side block 3 and the right side block 4. In this embodiment, in order to protect the cable skin and avoid friction damage to the cable caused by the left side block 3 and the right side block 4 during repeated contact and friction, the upper and lower corners of the left side block 3 on the inside are both arc-shaped transitions, and the upper and lower corners of the right side block 4 on the inside are both arc-shaped transitions. The above-mentioned arc-shaped transition parts can be further polished to be smooth, which can effectively reduce the friction damage to the cable skin.

[0024] See also Figure 1 and Figure 3 An outer groove 8 is provided on the outer side of the right side block 4, a horizontal sleeve 13 is provided in the center of the outer groove 8, a moving block 11 is provided at the outer end of the sleeve 13, a spring 12 is provided between the moving block 11 and the sleeve 13, and a pressure cover 5 is also provided on the outside of the moving block 11. The inner end of the pressure cover 5 is located in the outer groove 8 and is fixedly connected to the right side block 4.

[0025] The outer groove 8 and the sleeve 13 are formed by milling on the right side block 4. In this embodiment, the gland 5 is fixedly connected to the right side block 4 by a plurality of fastening screws 6. Specifically, a plurality of threaded holes are processed on the groove bottom of the outer groove 8, each of which is located at the four corners of the outer side of the sleeve 13. Connecting holes are provided at the four corners of the gland 5. Each fastening screw 6 passes through each connecting hole and the inner end is screwed into the corresponding threaded hole to realize the installation and fixation of the gland 5. After the gland 5 is installed and fixed, its inner end face abuts against the outer end face of the sleeve 13.

[0026] The moving block 11 moves back and forth along the axial direction of the sleeve 13, and the spring 12 provides elastic force for the moving block 11 to return to its original position. Figure 3 and Figure 4As shown in , the moving block 11 is in a stepped shape with a large outside and a small inside. The inner part is cylindrical and the outer part is rectangular. The outer part of the rectangular shape can prevent the moving block 11 from rotating as a whole. The outer end of the spring 12 is sleeved on the outside of the cylindrical part. The cross-sectional shape of the inner cavity of the gland 5 is consistent with the cross-sectional shape of the outer part of the moving block 11, and it also plays a certain guiding role in the movement of the moving block 11, that is, the gland 5 is equivalent to the guide sleeve of the moving block 11. As mentioned above, after the gland 5 is installed and fixed, its inner end face is against the outer end face of the sleeve 13, the inner diameter of the sleeve 13 is smaller than the length and width of the inner cavity of the gland 5, and the cross-sectional shape of the inner cavity of the gland 5 is consistent with the cross-sectional shape of the outer part of the moving block 11. It can be seen that when the moving block 11 moves inward as a whole, its outer part will be blocked by the outer end edge of the sleeve 13, so the range of movement of the moving block 11 in the axial direction is limited by the gland 5 and the sleeve 13.

[0027] See also Figure 3 and Figure 4 The outer end surface of the moving block 11 is provided with a limit groove 11-1 and a rotation groove 11-2, and also includes a camshaft 7 with a limit section 7-1 and a rotation section 7-2, the limit section 7-1 is located in the limit groove 11-1, the rotation section 7-2 is located in the rotation groove 11-2, and the front end of the camshaft 7 is passed through the shaft hole opened on the side wall of the pressure cover 5. The function of the camshaft 7 is to move the moving block 11 along the axial direction of the sleeve 13 during the rotation process, and the spring 12 provides the return elastic force of the moving block 11.

[0028] In this embodiment, the limiting groove 11-1 and the rotating groove 11-2 of the moving block 11 are horizontally connected, and a snap-in is provided in the middle of the front side of the limiting groove 11-1, and the rotating groove 11-2 extends to the rear end face of the moving block 11; the limiting section 7-1 of the camshaft 7 is a flat cylindrical shape, and the cross-section of the rotating section 7-2 is a crescent shape, and the neck of the camshaft 7 falls into the snap-in of the moving block 11.

[0029] The camshaft 7 rotates and moves the moving block 11 during the rotation process. The above-mentioned flat cylindrical limiting section 7-1 cooperates with the limiting groove 11-1 to limit the axial position of the camshaft 7, that is, the camshaft 7 will not move axially. The cooperation between the limiting section 7-1 and the limiting groove 11-1 allows the camshaft 7 to rotate freely. The cooperation between the above-mentioned neck and the bayonet improves the stability of the camshaft 7 during the rotation action, and at the same time prevents the camshaft 7 from slipping outward in the axial direction. This point is explained in the following processing and assembly methods and will not be repeated here.

[0030] During the rotation of the camshaft 7, the crescent-shaped shifting section 7-2 cooperates with the shifting groove 11-2 to achieve the axial shifting movement of the moving block 11. Figure 3 and Figure 4 : When the camshaft 7 rotates forward or reverse, the crescent-shaped edges on both sides thereof will exert a driving effect on the bottom of the dial groove 11-2, so that the moving block 11 moves inward along the axial direction. When it rotates to a certain extent, the arc-shaped part of the dial section 7-2 of the camshaft 7 contacts with the bottom of the dial groove 11-2; the reverse process is that when the camshaft 7 rotates forward or reverse, under the action of the elastic force of the spring 12, the moving block 11 moves outward along the axial direction. When it rotates to a certain extent, the planar part of the dial section 7-2 of the camshaft 7 contacts with the bottom of the dial groove 11-2, thus restoring the initial state.

[0031] The device further comprises a support arm 10 located between the left side block 3 and the right side block 4, and the right end of the support arm 10 is fixedly connected to the front end of the camshaft 7. In this embodiment, the end of the support arm 10 is fixedly connected to the outer end of the camshaft 7 by screws. Furthermore, in this embodiment, a plurality of through holes 9 are provided on the support arm 10, and the main function of providing the through holes 9 is to reduce the overall weight of the anti-slip device. When the support arm 10 is in a position such as Figure 1 and Figure 2 When the cable is in a horizontal state, the cable is confined in the space among the base plate 1, the left side block 3, the right side block 4 and the support arm 10 (this state is called a steady state). When the cable needs to leave the above space, the support arm 10 tilts upward or downward to open the front of the left side block 3 and the right side block 4 (this state is called a transient state).

[0032] 1. Processing and assembly methods

[0033] The base plate 1, the left side block 3 and the right side block 4 are formed by an integrated casting process; the mounting holes 2, the outer grooves 8 and the sleeves 13 are processed on a machining center, and the inner corners of the left side block 3 and the right side block 4 are finely polished to make them smooth; the moving block 11 and the pressure cover 5 are formed separately;

[0034] The spring 12 is placed inside the sleeve 13, and the inner cylindrical part of the moving block 11 is inserted into the outer end of the spring 12; then the camshaft 7 is inserted into the axial hole of the pressure cover 5, and then the combination of the pressure cover 5 and the camshaft 7 is installed on the moving block 11, that is, the limiting section 7-1 of the camshaft 7-1 falls into the limiting groove 11-1 of the moving block 11, the turning section 7-2 falls into the turning groove 11-2, and the neck of the camshaft 7 falls into the bayonet of the moving block 11 (so that the camshaft 7 can only rotate in the circumferential direction but cannot translate in the axial direction); then a plurality of fastening screws 6 are used to fix the pressure cover 5 and the right side block 4;

[0035] Then, screws are used to fix the end of the support arm 10 to the outer end of the camshaft 7. Specifically, a threaded hole is opened in the center of the outer end of the camshaft 7, and a connecting hole is set at the end of the support arm 10. The screw passes through the threaded hole on the support arm 10 and is screwed into the threaded hole at the outer end of the camshaft 7.

[0036] 2. On-site installation method

[0037] The anti-slip device is installed and fixed to a corresponding position on the elevator platform facility, that is, a specific position on the cable moving path, by using a plurality of bolts passing through each mounting hole 2.

[0038] 3. The dynamic process of work

[0039] In the initial state, the support arm 10 is in a non-horizontal state, that is, in a transient state; the elevator car drives the cable to move upward, and when it reaches the anti-slip device, the cable enters the space between the left side block 3 and the right side block 4, and then the lever set on the car moves the support arm 10, so that the support arm 10 reaches Figure 1 The cable is in a closed space and will not be detached from the device under the disturbance of external force, which is equivalent to fixing and protecting the cable.

[0040] When the elevator car drives the cable to move downward, the lever provided on the car moves the support arm 10, causing it to move upward. Figure 1 The steady state shown in FIG. 1 changes to a transient state of a non-horizontal state (moving the support arm 10 along the Figure 1 The cable is rotated counterclockwise in the middle), so that the cable is in a non-enclosed space. When the car continues to descend, the cable automatically escapes from the space between the left side block 3 and the right side block 4;

[0041] The above dynamic process is repeated during the multiple lifting and lowering of the car.

Claims

1. An anti-drop device for elevator cables, characterized in that: The invention comprises a base plate (1) with a plurality of mounting holes (2); a left side block (3) is provided on the left side of the front side of the base plate (1); a right side block (4) is provided on the right side; an outer groove (8) is provided on the outer side of the right side block (4); a horizontal sleeve (13) is provided at the center of the outer groove (8); a moving block (11) is provided at the outer end of the sleeve (13); a spring (12) is provided between the moving block (11) and the sleeve (13); a pressure cover (5) is also provided on the outside of the moving block (11); the inner end of the pressure cover (5) is located in the outer groove (8) and is fixedly connected to the right side block (4). The movable block (11) is provided with a limit groove (11-1) and a rotation groove (11-2) on the outer end surface thereof, and further comprises a camshaft (7) with a limit section (7-1) and a rotation section (7-2), wherein the limit section (7-1) is located in the limit groove (11-1), and the rotation section (7-2) is located in the rotation groove (11-2), and the front end of the camshaft (7) passes through an axial hole provided on the side wall of the pressure cover (5); and further comprises a support arm (10) located between the left side block (3) and the right side block (4), and the right end of the support arm (10) is fixedly connected to the front end of the camshaft (7).

2. The anti-drop device for elevator cables according to claim 1, characterized in that: The moving block (11) is in a stepped shape with a larger outer portion and a smaller inner portion. The inner portion of the moving block (11) is cylindrical, and the outer end of the spring (12) is sleeved on the outer side of the cylindrical portion.

3. The anti-dropping device for elevator cables according to claim 2, characterized in that: The limiting groove (11-1) and the rotating groove (11-2) of the moving block (11) are transversely connected, a bayonet is provided in the middle of the front side of the limiting groove (11-1), and the rotating groove (11-2) extends to the rear end surface of the moving block (11); the limiting section (7-1) of the camshaft (7) is in an oblate cylindrical shape, the cross section of the rotating section (7-2) is in a crescent shape, and the neck of the camshaft (7) falls into the bayonet of the moving block (11).

4. The anti-dropping device for elevator cables according to claim 3, characterized in that: The base plate (1), the left side block (3) and the right side block (4) are integrally cast, the upper and lower corners of the left side block (3) located inside are both arc-shaped transitions, and the upper and lower corners of the right side block (4) located inside are both arc-shaped transitions.

5. The anti-dropping device for elevator cables according to claim 4, characterized in that: The gland (5) is fixedly connected to the right side block (4) by using a plurality of fastening screws (6).

6. The anti-drop device for elevator cable according to claim 5, characterized in that: The end of the support arm (10) is fixedly connected to the outer end of the cam shaft (7) by means of screws.

7. The anti-dropping device for elevator cables according to claim 6, characterized in that: A plurality of through holes (9) are also provided on the support arm (10).

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