Tensioning device of elevator

Abstract

The utility model discloses a tensioning device of an elevator. The tensioning device comprises a mounting bottom plate (1), an adapter plate (2), a rocker (3), a rope wheel (4), a shield vertical plate (5), a supporting transverse plate (6) and a balancing weight (7), the adapter plate (2), the rocker (3), the protective cover vertical plate (5) and the supporting transverse plate (6) form a four-bar mechanism, the connecting point of the protective cover vertical plate (5) and the rocker (3) is located on the axis of the rope wheel (4), the adapter plate (2) is always parallel to the protective cover vertical plate (5) when the balancing weight (7) swings upwards or downwards, and the rocker (3) is always parallel to the supporting transverse plate (6). According to the tensioning device, the adapter plate, the rocker, the shield vertical plate and the supporting transverse plate form a four-connecting-rod mechanism, so that a steel wire rope on a rope wheel does not touch a rope blocking rod when ascending or descending, and potential safety hazards are eliminated.

Description

Technical Field

[0001] The utility model relates to the technical field of elevator parts, in particular to a tensioning device for an elevator. Background Art

[0002] The tensioning device of the elevator is composed of a tensioning wheel, a bracket, a tensioning wheel switch, a counterweight or a spring, etc. It is installed in the pit and connected to the speed limiter and the car safety clamp through the speed limiter rope. It has two purposes. First, under normal conditions, it ensures that the speed limiter can monitor the car speed in real time; second, in an emergency, when the speed limiter is activated, it ensures that sufficient tension is generated on the speed limiter rope.

[0003] The tensioning wheel is generally installed on the rocker, and a protective cover is provided on the outside of the tensioning wheel. A rope stop rod is provided on the left and right sides of the tensioning wheel respectively. Under normal circumstances, there is a certain distance between the wire rope on the tensioning wheel and the rope stop rods on both sides, and the straightened wire rope on each side will not touch the rope stop rod. However, when the tensioning wheel moves up or down, the wire rope on one side will touch the rope stop rod on the same side, thereby affecting the operation of the wire rope. The wire rope may be worn out during long-term operation, posing a serious safety hazard. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a tensioning device for an elevator which comprises a transfer plate, a rocker, a guard vertical plate and a supporting horizontal plate to form a four-bar linkage, so that the steel wire rope on the rope wheel will not collide with the rope blocking rod when rising or falling, thereby eliminating the potential safety hazard.

[0005] The technical solution of the utility model is to provide a tensioning device of an elevator with the following structure, including a mounting base plate, an adapter plate, a rocker, a rope pulley, a guard vertical plate, a supporting horizontal plate, and a counterweight; one end of the adapter plate is fixed to the mounting base plate, the rocker is horizontally arranged and one end is fixed to the other end of the adapter plate, and the counterweight is arranged at the other end of the rocker; the rope pulley is rotatably connected to the middle part of the rocker; it is characterized in that: the adapter plate, the rocker, the guard vertical plate and the supporting horizontal plate form a four-bar mechanism, and the connection point between the guard vertical plate and the rocker is located on the axis of the rope pulley, and when the counterweight is swinging upward or downward, the adapter plate is always parallel to the guard vertical plate, and the rocker is always parallel to the supporting horizontal plate.

[0006] The four-bar linkage mechanism composed of the adapter plate, rocker, shield vertical plate and supporting horizontal plate is a parallelogram structure, and the connection points of the adapter plate, rocker, shield vertical plate and supporting horizontal plate are all hinged together.

[0007] The tensioning device is provided with trigger switches of two mounting structures: the first trigger switch is a first switch trigger component arranged on the rocker arm, and the second trigger switch is a second switch trigger component arranged on the adapter plate. When the counterweight block swings upward or downward, the trigger mechanism located on the rocker arm triggers the first switch trigger component or the second switch trigger component.

[0008] The rocker is provided with a first switch trigger assembly, which includes a first switch, a first switch trigger plate, a switch lever, and a driving rod; the switch lever is connected to the first switch, and the driving rod is fixed to one end of the switch lever; the first switch trigger plate is L-shaped and includes a cross bar and a vertical bar; a notch is provided at the free end of the cross bar, and the other end of the driving rod is cut into the notch; the bottom end of the vertical rod is rotatably connected to the vertical plate of the shield and the hinge shaft supporting the cross plate; when the counterweight block swings upward or downward, the side wall of the notch on the first switch trigger plate pushes the driving rod, and drives the switch lever to trigger the first switch.

[0009] A second switch trigger assembly is provided on the adapter plate, and the second switch trigger assembly includes a travel switch and a second switch trigger rod. The second switch trigger rod is located on the rocker, and an arc groove is provided on the adapter plate. The second switch trigger rod passes through the arc groove and is located above the trigger end of the travel switch. When the counterweight block swings downward, the second switch trigger rod moves downward and triggers the travel switch.

[0010] The first switch is located on a rocker between the rotating shaft of the rope wheel and the counterweight.

[0011] The travel switch is arranged on the adapter plate and arranged along the vertical direction.

[0012] After adopting the above structure, the utility model has the following advantages: the adapter plate, rocker, shield vertical plate and supporting horizontal plate form a four-bar linkage, and the connection point of the shield vertical plate and the rocker is located on the axis of the rope wheel, so that the central axis of the rope wheel is located at a vertex of the four-bar linkage. When the counterweight block swings upward or downward, the adapter plate is always parallel to the shield vertical plate, and the rocker is always parallel to the supporting horizontal plate, so that the motion trajectory of the central axis of the rope wheel is parallel to the adapter plate. In the normal state, the distance between the central axis of the rope wheel and the rope stop rod is the longest. When the rope wheel is lifted up and down, the distance between the central axis of the rope wheel and the rope stop rod is shortened, so as to avoid the steel wire rope from colliding with the rope stop rod after tilting, so that the steel wire rope on the rope wheel will not collide with the rope stop rod whether it is rising or falling, eliminating the safety hazard.

[0013] As an improvement, the four-bar linkage composed of the adapter plate, rocker, shield vertical plate and supporting horizontal plate is a parallelogram structure, and the connections between the adapter plate, rocker, shield vertical plate and supporting horizontal plate are hinged together to ensure the connection reliability of the four sides.

[0014] As an improvement, the tensioning device is provided with trigger switches of two installation structures: the first trigger switch is a first switch trigger component arranged on the rocker arm, and the second trigger switch is a second switch trigger component arranged on the adapter plate. When the counterweight block swings upward or downward, the trigger mechanism located on the rocker arm triggers the first switch trigger component or the second switch trigger component, and the installation positions and methods of the two switches can be provided, so that the tensioning device has a wider range of applications.

[0015] As an improvement, the rocker is provided with a first switch trigger assembly, which includes a first switch, a first switch trigger plate, a switch lever, and a driving rod; the switch lever is connected to the first switch, and the driving rod is fixed to one end of the switch lever; the first switch trigger plate is L-shaped and includes a cross bar and a vertical bar; the free end of the cross bar is provided with a notch, and the other end of the driving rod is cut into the notch; the bottom end of the vertical rod is rotatably connected to the hinge shaft of the vertical plate of the shield and the supporting cross plate; when the counterweight block swings upward or downward, the side wall of the notch on the first switch trigger plate pushes the driving rod, drives the switch lever to trigger the first switch; the structure has good reliability, direct drive, and can ensure the triggering effect.

[0016] A second switch trigger assembly is provided on the adapter plate, and the second switch trigger assembly includes a travel switch and a second switch trigger rod. The second switch trigger rod is located on the rocker, and an arc groove is provided on the adapter plate. The second switch trigger rod passes through the arc groove and is located above the trigger end of the travel switch. When the counterweight block swings downward, the second switch trigger rod moves downward and triggers the travel switch. This structure has good reliability, direct drive, and can ensure the triggering effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the tensioning device of the elevator of the utility model.

[0018] Figure 2 It is a schematic diagram of a first switch trigger component of the utility model.

[0019] Figure 3 It is a schematic diagram of the second switch trigger component of the utility model.

[0020] Figure 4 It is a front schematic diagram of the four-bar linkage of the utility model.

[0021] Figure 5 It is a schematic diagram of the back and front of the four-bar linkage of the utility model.

[0022] Figure 6 It is a structural schematic diagram of the normal state of the tensioning device of the elevator of the utility model.

[0023] Figure 7 It is a structural schematic diagram of the downward state of the tensioning device of the elevator of the utility model.

[0024] Figure 8 It is a structural schematic diagram of the upward state of the tensioning device of the elevator of the utility model.

[0025] As shown in the figure: 1. Installation base plate, 2. Adapter plate, 3. Rocker, 4. Pulley, 5. Guard vertical plate, 6. Support horizontal plate, 7. Counterweight, 8. First switch, 9. First switch trigger plate, 9.1. Cross bar, 9.2. Vertical bar, 10. Switch lever, 11. Drive rod, 12. Notch, 13. Travel switch, 14. Second switch trigger rod. DETAILED DESCRIPTION

[0026] The utility model will be further described below in conjunction with the accompanying drawings.

[0027] like Figure 1-8 As shown, the utility model is a tensioning device for an elevator, comprising a mounting base plate 1, an adapter plate 2, a rocker 3, a rope pulley 4, a guard vertical plate 5, a supporting horizontal plate 6, and a counterweight 7; one end of the adapter plate 2 is fixed to the mounting base plate 1, the rocker 3 is horizontally arranged and one end is fixed to the other end of the adapter plate 2, and the counterweight 7 is arranged at the other end of the rocker 3; the rope pulley 4 is rotatably connected to the middle part of the rocker 3.

[0028] The rocker 3 is a lever, the fulcrum of which is located on the adapter plate 2, the rope pulley 4 to the fulcrum is a power arm, and the counterweight block 7 to the fulcrum is a resistance arm.

[0029] like Figure 4 and Figure 5 As shown, the adapter plate 2, rocker 3, shield vertical plate 5 and supporting horizontal plate 6 form a four-bar linkage, and the connection point of the shield vertical plate 5 and the rocker 3 is located on the axis of the rope pulley 4. The four-bar linkage composed of the adapter plate 2, rocker 3, shield vertical plate 5 and supporting horizontal plate 6 is a parallelogram structure, and the connection points of the adapter plate 2, rocker 3, shield vertical plate 5 and supporting horizontal plate 6 are all hinged together. When the counterweight 7 swings upward or downward, the adapter plate 2 is always parallel to the shield vertical plate 5, and the rocker 3 is always parallel to the supporting horizontal plate 6.

[0030] like Figure 1 As shown, the tensioning device is provided with trigger switches of two mounting structures: the first trigger switch is a first switch trigger component arranged on the rocker 3, and the second trigger switch is a second switch trigger component arranged on the adapter plate 2. When the counterweight block 7 swings upward or downward, the trigger mechanism located on the rocker 3 triggers the first switch trigger component or the second switch trigger component.

[0031] like Figure 2As shown, the rocker 3 is provided with a first switch trigger assembly, which includes a first switch 8, a first switch trigger plate 9, a switch lever 10, and a driving rod 11; the switch lever 10 is connected to the first switch 8, and the driving rod 11 is fixed to one end of the switch lever 10. The first switch trigger plate 9 is L-shaped and includes a crossbar 9.1 and a vertical bar 9.2. The free end of the crossbar 9.1 is provided with a notch 12, and the other end of the driving rod 11 is cut into the notch 12. The bottom end of the vertical bar 9.2 is rotatably connected to the hinge shaft of the shield vertical plate 5 and the supporting cross plate 6. When the counterweight 7 swings upward or downward, the side wall of the notch 12 on the first switch trigger plate 9 pushes the driving rod 11, drives the switch lever 10 and triggers the first switch 8. The first switch 8 is located on the rocker 3 between the rotating shaft of the rope wheel 4 and the counterweight 7.

[0032] like Figure 3 As shown, the adapter plate 2 is provided with a second switch trigger assembly, the second switch trigger assembly includes a travel switch 13 and a second switch trigger rod 14, the second switch trigger rod 14 is located on the rocker 3, the adapter plate 2 is provided with an arc groove 15, the second switch trigger rod 14 passes through the arc groove 15 and is located above the trigger end of the travel switch 13, when the counterweight 7 swings downward, the second switch trigger rod 14 moves downward and triggers the travel switch 13. The travel switch 13 is arranged on the adapter plate 2 and is arranged in the vertical direction.

[0033] like Figure 6 As shown, it is the normal state of the tensioning device of the elevator, at this time, the rocker 3 is in a horizontal state, the tension of the wire rope is balanced with the gravity of the counterweight 7, and the four-bar mechanism composed of the adapter plate 2, the rocker 3, the guard vertical plate 5 and the supporting horizontal plate 6 is a rectangular structure.

[0034] like Figure 7 As shown, the elevator tensioning device is in the downward state, the counterweight block 7 moves downward and at the same time drives the far end of the rocker 3 downward, and at the same time the vertical plate 5 of the shield moves downward along the parallel line of the adapter plate 2, so that the four-bar linkage becomes a parallelogram inclined downward.

[0035] like Figure 8 As shown, the tensioning device of the elevator is in the upward state, the counterweight block 7 moves upward and drives the distal end of the rocker 3 upward at the same time, and the vertical plate 5 of the shield moves upward along the parallel line of the adapter plate 2, so that the four-bar linkage becomes a parallelogram inclined upward.

Claims

1. An elevator tensioning device, comprising a mounting base plate (1), an adapter plate (2), a rocker (3), a rope pulley (4), a guard vertical plate (5), a supporting horizontal plate (6), and a counterweight (7); one end of the adapter plate (2) is fixed to the mounting base plate (1), the rocker (3) is horizontally arranged and one end is fixed to the other end of the adapter plate (2), and the counterweight (7) is arranged at the other end of the rocker (3); the rope pulley (4) is rotatably connected to the middle part of the rocker (3); characterized in that: The adapter plate (2), the rocker (3), the guard vertical plate (5) and the supporting transverse plate (6) form a four-bar linkage, and the connection point between the guard vertical plate (5) and the rocker (3) is located on the axis of the rope pulley (4). When the counterweight (7) swings upward or downward, the adapter plate (2) and the guard vertical plate (5) are always parallel, and the rocker (3) and the supporting transverse plate (6) are always parallel.

2. The tensioning device of an elevator according to claim 1, characterized in that: The four-bar linkage composed of the adapter plate (2), the rocker (3), the shield vertical plate (5) and the supporting horizontal plate (6) is a parallelogram structure, and the first connection points of the adapter plate (2), the rocker (3), the shield vertical plate (5) and the supporting horizontal plate (6) are all hinged.

3. The tensioning device of an elevator according to claim 1, characterized in that: The tensioning device is provided with trigger switches of two installation structures: the first type of trigger switch is a first switch trigger component arranged on the rocker (3), and the second type of trigger switch is a second switch trigger component arranged on the adapter plate (2); when the counterweight (7) is in an upward or downward swinging state, the trigger mechanism located on the rocker (3) triggers the first switch trigger component or the second switch trigger component.

4. The tensioning device of an elevator according to claim 3, characterized in that: The rocker (3) is provided with a first switch trigger assembly, which comprises a first switch (8), a first switch trigger plate (9), a switch lever (10), and a driving rod (11); the switch lever (10) is connected to the first switch (8), the driving rod (11) is fixed to one end of the switch lever (10), the first switch trigger plate (9) is L-shaped, and comprises a cross bar (9.1) and a vertical bar (9.2), a notch (12) is provided at the free end of the cross bar (9.1), the other end of the driving rod (11) is cut into the notch (12), the bottom end of the vertical bar (9.2) is rotatably connected to the hinge shaft of the shield vertical plate (5) and the supporting cross plate (6), and the side wall of the notch (12) on the first switch trigger plate (9) pushes the driving rod (11) when the counterweight (7) swings upward or downward, and drives the switch lever (10) to trigger the first switch (8).

5. The tensioning device of an elevator according to claim 3, characterized in that: The adapter plate (2) is provided with a second switch trigger assembly, the second switch trigger assembly comprises a travel switch (13) and a second switch trigger rod (14), the second switch trigger rod (14) is located on the rocker (3), an arc groove (15) is provided on the adapter plate (2), the second switch trigger rod (14) passes through the arc groove (15) and is located above the trigger end of the travel switch (13), and when the counterweight (7) is in a downward swinging state, the second switch trigger rod (14) moves downward and triggers the travel switch (13).

6. The tensioning device of an elevator according to claim 4, characterized in that: The first switch (8) is located on the rocker (3) between the rotating shaft of the rope wheel (4) and the counterweight (7).

7. The tensioning device of an elevator according to claim 5, characterized in that: The travel switch (13) is arranged on the adapter plate (2) and is arranged in the vertical direction.

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