A pulley device for elevators

Abstract

This invention discloses an elevator pulley device, relating to the field of elevator pulley technology. The elevator pulley device of this invention includes a wheel body. A detachable positioning ring is circumferentially arranged on the outer wall of the wheel body. The positioning ring has multiple circumferentially arranged grooves. Multiple radially movable limiting blocks are provided on the outer wall of the wheel body. A limiting groove for cooperating with the limiting blocks is formed on the inner wall of the positioning ring. An annular guide groove is formed on the wheel body. A guide ring is disposed within the guide groove. A guide block is provided on the outer wall of the guide ring. The guide block has an inclined guide surface, which contacts the limiting blocks and drives them to move radially outward, so that the limiting blocks enter the limiting groove to form a limiting structure. Modular replacement is convenient when the grooves on the outer wall of the pulley become worn and need to be replaced, or when it is necessary to adapt to steel wire ropes of different outer diameters.

Description

Technical Field

[0001] This invention relates to the field of elevator pulley technology, and more specifically to an elevator pulley device. Background Technology

[0002] Elevators often require pulleys to move them up and down. Pulleys typically have multiple grooves on their circumferential surface to accommodate the steel wire rope. However, the groove widths on existing pulleys are fixed. Over time, as the grooves wear and widen, they become mismatched with the outer diameter of the steel wire rope, leading to wobbling. Furthermore, when using steel wire ropes of different outer diameters, pulleys of different specifications must be replaced, necessitating the replacement of the entire pulley system.

[0003] Existing technology, such as Chinese patent application number 202310337587.4, discloses a steel-plastic composite pulley for elevators, which combines metal and engineering plastic, effectively solving the shortcomings of unstable and poor strength of plastic products. Furthermore, its patent literature... Figure 3 It can also be seen that the outer wall of the pulley has multiple grooves for accommodating the wire rope. However, the width of the grooves is fixed. When wire ropes of different diameters are needed, or when the grooves are worn and need to be replaced, the entire pulley needs to be replaced, which is not conducive to the rational use of resources. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a pulley device for elevators, which facilitates modular replacement when the grooves on the outer wall of the pulley are worn and need to be replaced, or when it is necessary to adapt to steel wire ropes of different outer diameters.

[0005] The specific technical solution of the present invention is as follows:

[0006] This invention provides a pulley device for elevators, including a wheel body. A detachable positioning ring is circumferentially arranged on the outer wall of the wheel body. The positioning ring has multiple circumferentially arranged grooves. Multiple radially movable limiting blocks are provided on the outer wall of the wheel body. A limiting groove for engaging with the limiting blocks is formed on the inner wall of the positioning ring. An annular guide groove is formed on the wheel body. A guide ring is disposed within the guide groove. A guide block is provided on the outer wall of the guide ring. The guide block has an inclined guide surface. The guide surface contacts the limiting blocks and drives them to move radially outward, so that the limiting blocks enter the limiting groove to form a limiting structure.

[0007] Preferably, the wheel body has a receiving groove for accommodating the limiting block, and the depth of the receiving groove is greater than or equal to the thickness of the limiting block.

[0008] Preferably, the bottom of the limiting block is provided with a guide rod, and the bottom wall of the receiving groove is provided with a guide hole for the guide rod to pass through. The guide hole is connected to the guide groove, and the guide rod can contact the guide surface.

[0009] Preferably, a spring groove is extended at the end of the guide hole away from the receiving groove, a baffle is provided on the outer wall of the guide rod, and a reset spring is sleeved around the guide rod between the baffle and the spring groove, so that the limiting block has a tendency to move into the receiving groove.

[0010] Preferably, the guide block protrudes from the outer wall of the guide ring, and the two sides of the guide block are inclined outward in the direction close to the guide ring to form the guide surface. The guide block has a positioning groove located between the two guide surfaces.

[0011] Preferably, the side wall of the wheel body is provided with an annular through groove, the through groove is located outside the guide groove and is interconnected, the width of the through groove is smaller than the width of the guide groove, and the outer wall of the guide ring is provided with a fixing rod that passes through the through groove.

[0012] Preferably, the outer end of the fixing rod is provided with a multi-purpose rod, and the outer end of the fixing rod is provided with a first positioning hole along the axial direction. The inner wall of the first positioning hole is provided with a pin. One end of the multi-purpose rod extends into the first positioning hole and is rotatably connected to the pin, and the other end is a free end. The multi-purpose rod is provided with a sliding groove for the pin to pass through in the radial direction. The sliding groove extends along the axial direction of the multi-purpose rod. The side wall of the first positioning hole is provided with a second positioning hole in the vertical direction. The part of the second positioning hole above the pin passes through the outer wall of the multi-purpose rod in the axial direction.

[0013] Preferably, the inner diameter of the first positioning hole and the second positioning hole is greater than or equal to the outer diameter of the multi-purpose rod, and when the multi-purpose rod is penetrating the second positioning hole, its free end can form a limiting structure with the positioning ring.

[0014] Preferably, a compression spring is provided between the pin and the inner wall of the slide near the guide groove.

[0015] Preferably, the intersection of the axis of the first positioning hole and the axis of the second positioning hole is located on the axis of the multi-purpose rod.

[0016] The above-mentioned technical features can be combined in various suitable ways or replaced by equivalent technical features, as long as the purpose of the present invention can be achieved.

[0017] The elevator pulley device provided by this invention has the following advantages compared with the prior art:

[0018] The positioning ring is detachably mounted on the outer wall of the wheel body. When the groove on the positioning ring is severely worn and needs to be replaced, or when steel wire ropes of different outer diameters are required, only the positioning ring needs to be replaced, without replacing the entire wheel body, thus saving resources. The cooperation between the limiting block and the limiting groove effectively prevents the positioning ring from sliding relative to the wheel body, avoiding slippage. The guide block and guide ring enable the rotating guide ring to simultaneously move multiple ring-shaped limiting blocks radially outward, achieving quick installation of the positioning ring. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0020] Figure 1 This is a cross-sectional structural diagram provided in Embodiment 1 of the present invention;

[0021] Figure 2 for Figure 1 Enlarged structural diagram at point A in the middle;

[0022] Figure 3 This is a front view schematic diagram of the guide ring;

[0023] Figure 4 for Figure 3 Enlarged structural diagram at point B;

[0024] Figure 5 This is a schematic diagram of the main external shape of the present invention;

[0025] In the attached diagram, 10-wheel body, 20-positioning ring, 21-groove, 22-limiting groove, 30-limiting block, 31-accommodating groove, 32-spring groove, 33-guide groove, 40-guide ring, 41-guide block, 42-guide surface, 43-positioning groove, 50-guide rod, 51-reset spring, 52-baffle, 60-fixing rod, 61-through groove, 70-multi-purpose rod, 71-pin, 72-compression spring, 73-slide groove, 80-first positioning hole, 90-second positioning hole. Detailed Implementation

[0026] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0027] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate for the embodiments of this application described herein.

[0028] In this application, the terms "upper," "lower," "inner," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily used to better describe this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0029] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0030] Furthermore, the terms "set up," "equipped with," "connected," and "fixed" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0031] In addition, the term "multiple" should mean two or more.

[0032] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0033] like Figure 1 and 2As shown, the present invention provides an elevator pulley device, including a wheel body 10, which may be made of steel-plastic composite material. The outer wall of the wheel body 10 is provided with a detachable positioning ring 20 along the circumferential direction. The positioning ring 20 has a plurality of grooves 21 arranged along the circumferential direction. The outer wall of the wheel body 10 is provided with a plurality of limiting blocks 30 that can move radially therefrom. The inner wall of the positioning ring 20 is provided with a limiting groove 22 for cooperating with the limiting blocks 30. The wheel body 10 is provided with an annular guide groove 33. A guide ring 40 is provided in the guide groove 33. A guide block 41 is provided on the outer wall of the guide ring 40. The guide block 41 has an inclined guide surface 42. The guide surface 42 is used to contact the limiting block 30 and can drive it to move radially outward, so that the limiting block 30 enters the limiting groove 22 to form a limiting structure.

[0034] Specifically, different positioning rings 20 may have different widths of the grooves 21 on their outer walls for mating with the wire rope, in order to adapt to wire ropes of different outer diameters. The limiting block 30 is preferably arc-shaped, and the inner wall of the limiting groove 22 matches the outer wall of the limiting block 30, ensuring that the positioning ring 20 can be tightly connected to the wheel body 10 after the limiting block 30 enters the limiting groove 22. All the limiting blocks 30 are arranged in a ring; furthermore, multiple sets of limiting block 30 structures can be provided according to the width of the wheel body 10. The guide block 41 is connected to the guide ring 40. By applying a circumferential rotational force to the guide ring 40, the guide ring 40 moves circumferentially relative to the limiting block 30. During the movement of the guide ring 40, the guide block 41 located on the periphery of the guide ring 40 contacts the guide block 41. Since the guide block 41 has an inclined guide surface 42, the guide surface 42 applies a radially outward component force to the guide block 41, thereby pushing the limiting block 30 to move radially outward, so that the limiting block 30 enters the limiting groove 22 to form a limiting structure, thereby keeping the positioning ring 20 and the wheel body 10 as one, completing the installation. When it is necessary to replace the positioning ring 20, the above operation is reversed. It should be noted that the guide ring 40 and the guide groove 33 are damped, that is, the guide ring 40 needs to overcome a certain external force to make rotational movement.

[0035] Preferably, the wheel body 10 has a receiving groove 31 for accommodating the limiting block 30, and the depth of the receiving groove 31 is greater than or equal to the thickness of the limiting block 30.

[0036] Specifically, by limiting the depth of the receiving groove 31, the limiting block 30 can be completely housed within the receiving groove 31. Furthermore, when the inner diameter of the positioning ring 20 is equal to the outer diameter of the wheel body 10, it can be installed smoothly without applying radial external force to the positioning ring 20 to cause elastic deformation, reducing the limitation on the material and facilitating the installation of the positioning ring 20, thus improving installation efficiency.

[0037] Preferably, the bottom of the limiting block 30 is provided with a guide rod 50, and the bottom wall of the receiving groove 31 is provided with a guide hole for the guide rod 50 to pass through. The guide hole is connected to the guide groove 33, and the guide rod 50 can contact the guide surface 42.

[0038] Specifically, the upper end of the guide rod 50 is connected to the limiting block 30 as a whole, the lower end of the guide rod 50 is a free end, and the lower end of the guide rod 50 is hemispherical, so that when it contacts the inclined guide surface 42, it can smoothly transition and ensure the stability of the movement of the limiting block 30.

[0039] Preferably, a spring groove 32 is extended at the end of the guide hole away from the receiving groove 31, a baffle 52 is provided on the outer wall of the guide rod 50, and a reset spring 51 located between the baffle 52 and the spring groove 32 is sleeved around the guide rod 50, so that the limiting block 30 has a tendency to move into the receiving groove 31.

[0040] Specifically, by setting a reset spring 51, the guide rod 50 and the limiting block 30 form a whole that tends to move radially inward. When the positioning ring 20 needs to be replaced, the guide block 41 loses its thrust and can automatically exit from the limiting groove 22 and be stored in the receiving groove 31 under the action of the reset spring 51. This causes the limiting block 30 to lose its limiting effect on the positioning ring 20, so that the positioning ring 20 can be easily removed from the wheel body 10, thereby improving the replacement efficiency of the positioning ring 20.

[0041] Preferred, such as Figure 3 and 4 As shown, the guide block 41 is protruding on the outer wall of the guide ring 40, and the two sides of the guide block 41 are inclined outward along the direction close to the guide ring 40 to form guide surfaces 42. The guide block 41 has a positioning groove 43 located between the two guide surfaces 42.

[0042] Specifically, both sides of the guide block 41 are guide surfaces 42, allowing the guide ring 40 to rotate in the same direction, thus enabling the limiting block 30 to enter and exit the limiting groove 22. By providing a positioning groove 43, the positioning groove 43 can provide a certain positioning function for the guide rod 50, ensuring that when the guide rod 50 moves into the positioning groove 43, the positioning rod will not move arbitrarily on the outer wall of the positioning block, improving the stability of the overall structure.

[0043] Preferably, the side wall of the wheel body 10 is provided with an annular through groove 61, the through groove 61 is located outside the guide groove 33 and is interconnected, the width of the through groove 61 is smaller than the width of the guide groove 33, and the outer wall of the guide ring 40 is provided with a fixing rod 60 that passes through the through groove 61.

[0044] Specifically, a fixing rod 60 is provided to apply an external force for circumferential rotation to the guide ring 40.

[0045] Preferably, a multi-purpose rod 70 is provided at the outer end of the fixing rod 60. A first positioning hole 80 is provided at the outer end of the fixing rod 60 along the axial direction. A pin 71 is provided on the inner wall of the first positioning hole 80. One end of the multi-purpose rod 70 extends into the first positioning hole 80 and is rotatably connected to the pin 71, while the other end is a free end. A sliding groove 73 is provided radially through the multi-purpose rod 70 for the pin 71 to pass through. The sliding groove 73 extends along the axial direction of the multi-purpose rod 70. A second positioning hole 90 is provided vertically through the side wall of the first positioning hole 80. The portion of the second positioning hole 90 located above the pin 71 extends axially through the outer wall of the multi-purpose rod 70.

[0046] Specifically, the multi-purpose rod 70 can be located in the first positioning hole 80 and the second positioning hole 90, and its function differs depending on the location in the two holes. When the multi-purpose rod 70 is located in the first positioning hole 80, the axes of the multi-purpose rod 70 and the fixed rod 60 are on the same straight line. The multi-purpose rod 70 extends the fixed rod 60, making it easier for the operator to hold the multi-purpose rod 70 and apply a circumferential rotational force to the guide ring 40. At this time, the inner wall of the first positioning hole 80 can also restrict the multi-purpose rod 70 to ensure that the operator can smoothly drive the guide ring 40 to rotate. When the multi-purpose rod 70 is located within the second positioning hole 90, its axis is perpendicular to the axis of the fixed rod 60. The inner wall of the second positioning hole 90 provides a limiting function for the multi-purpose rod 70. The multi-purpose rod 70 is long enough to ensure that its outer end is located around the positioning ring 20. The multi-purpose rod 70 also provides auxiliary limiting to the outer wall of the positioning ring 20, preventing the positioning ring 20 from accidentally detaching from the wheel body 10. It should be noted that the portion of the second positioning hole 90 above the pin 71 extends axially through the outer wall of the multi-purpose rod 70 to ensure that the multi-purpose rod 70 can be transferred from the first positioning hole 80 to the second positioning hole 90. During the transfer of the multi-purpose rod 70 from the first positioning hole 80 to the second positioning hole 90, an outward pulling force is first applied to the multi-purpose rod 70 to remove it from the first positioning hole 80, and then it is rotated upwards by 90° to move its lower end into the second positioning hole 90.

[0047] Preferably, the inner diameter of the first positioning hole 80 and the second positioning hole 90 is greater than or equal to the outer diameter of the multi-purpose rod 70, and when the multi-purpose rod 70 is in the position of penetrating the second positioning hole 90, its free end can form a limiting structure with the positioning ring 20.

[0048] Specifically, by limiting the length of the multi-purpose rod 70, it is ensured that when it is in a vertical state, its free end can be located outside the positioning ring 20 and form a limiting structure with it.

[0049] Preferably, a compression spring 72 is provided between the pin 71 and the inner wall of the slide groove 73 near the guide groove 33.

[0050] Specifically, by setting a compression spring 72, the multi-purpose rod 70 always tends to move closer to the first positioning hole 80 or the second positioning hole 90 under the action of the compression spring 72, so that the end of the multi-purpose rod 70 is always located in the first positioning hole 80 or the second positioning hole 90, ensuring that the multi-purpose rod 70 will not wobble.

[0051] Preferably, the intersection of the axis of the first positioning hole 80 and the axis of the second positioning hole 90 is located on the axis of the multi-purpose rod 70.

[0052] Specifically, by limiting the position of the pin 71, it is ensured that the end of the multi-purpose rod 70 can enter the first positioning hole 80 or the second positioning hole 90.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A pulley device for elevators, characterized in that, The device includes a wheel body, the outer wall of which is provided with a detachable positioning ring along the circumferential direction. The positioning ring has multiple grooves arranged along the circumferential direction. The outer wall of the wheel body is provided with multiple limiting blocks that can move radially therefrom. The inner wall of the positioning ring is provided with a limiting groove for cooperating with the limiting blocks. The wheel body is provided with an annular guide groove. A guide ring is provided in the guide groove. A guide block is provided on the outer wall of the guide ring. The guide block has an inclined guide surface. The guide surface is used to contact the limiting blocks and can drive them to move radially outward so that the limiting blocks enter the limiting groove to form a limiting structure. The wheel body has a receiving groove for accommodating the limiting block, and the depth of the receiving groove is greater than or equal to the thickness of the limiting block. The side wall of the wheel body is provided with an annular through groove, the through groove is located outside the guide groove and is interconnected, the width of the through groove is smaller than the width of the guide groove, and the outer wall of the guide ring is provided with a fixing rod that passes through the through groove; The outer end of the fixed rod is provided with a multi-purpose rod. The outer end of the fixed rod is provided with a first positioning hole along the axial direction. The inner wall of the first positioning hole is provided with a pin. One end of the multi-purpose rod extends into the first positioning hole and is rotatably connected to the pin, while the other end is a free end. The multi-purpose rod is provided with a sliding groove for the pin to pass through in the radial direction. The sliding groove extends along the axial direction of the multi-purpose rod. The side wall of the first positioning hole is provided with a second positioning hole in the vertical direction. The part of the second positioning hole above the pin passes through the outer wall of the multi-purpose rod in the axial direction. The bottom of the limiting block is provided with a guide rod, and the bottom wall of the receiving groove is provided with a guide hole for the guide rod to pass through. The guide hole is connected to the guide groove, and the guide rod can contact the guide surface. The guide hole is extended with a spring groove at the end away from the receiving groove, a baffle is provided on the outer wall of the guide rod, and a reset spring is sleeved around the guide rod between the baffle and the spring groove, so that the limiting block has a tendency to move into the receiving groove; The guide block protrudes from the outer wall of the guide ring, and the two sides of the guide block are inclined outward along the direction close to the guide ring to form the guide surface. The guide block has a positioning groove located between the two guide surfaces.

2. The elevator pulley device according to claim 1, characterized in that: The inner diameter of the first positioning hole and the second positioning hole is greater than or equal to the outer diameter of the multi-purpose rod. When the multi-purpose rod is in the position of passing through the second positioning hole, its free end can form a limiting structure with the positioning ring.

3. The elevator pulley device according to claim 1, characterized in that: A compression spring is provided between the pin and the inner wall of the slide near the guide groove.

4. The elevator pulley device according to claim 1, characterized in that: The intersection of the axis of the first positioning hole and the axis of the second positioning hole is located on the axis of the multi-purpose rod.

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