Spline lubricating structure, escalator and personnel transportation device

Abstract

The utility model discloses a spline lubricating structure, an escalator comprising the spline lubricating structure and a personnel transportation device comprising the spline lubricating structure. The spline lubrication structure includes: a main shaft including a main shaft tooth section provided with an internal spline; the chain wheel is arranged on the main shaft in a sleeving mode and comprises a chain wheel tooth section provided with an outer spline and configured to be matched with the main shaft tooth section, an inlet section and an outlet section, the inlet section and the outlet section are located on the two sides of the chain wheel tooth section respectively, and the outlet section is spaced from the main shaft in the radial direction so as to form an outlet annular channel surrounding one part of the main shaft on the whole circumference; and the shaft sleeve is arranged on the main shaft in a sleeving mode, located between the main shaft and the inlet section in the radial direction and spaced from the chain wheel tooth section in the axial direction, so that an inlet annular channel surrounding a part of the main shaft on the whole circumference is formed among the main shaft, the chain wheel and the shaft sleeve. According to the spline lubricating structure, it can be guaranteed that lubricating agents smoothly flow in the spline between the chain wheel and the main shaft, and the service life of the spline is remarkably prolonged.

Description

Technical Field

[0001] The utility model relates to a spline lubrication structure, and an escalator and a personnel transportation device comprising the spline lubrication structure. Background Art

[0002] People transportation devices, such as escalators, usually use the main shaft as the main component to carry passenger load and transmit motor power, and the main shaft and sprocket are usually connected by a key. Compared with the flat key, the spline has a greater load-bearing capacity. However, under long-term use, the spline is prone to wear. Utility Model Content

[0003] In view of the above problems, according to the first aspect of the utility model, a spline lubrication structure is proposed, comprising: a main shaft extending in an axial direction, comprising a main shaft tooth section provided with an internal spline; a sprocket, sleeved on the main shaft, comprising a sprocket tooth section provided with an external spline and configured to cooperate with the main shaft tooth section, an inlet section located on one side of the sprocket tooth section in the axial direction, and an outlet section located on the other side of the sprocket tooth section opposite to the one side in the axial direction, wherein the outlet section is spaced apart from the main shaft in a radial direction to form an outlet annular channel surrounding a portion of the main shaft over the entire circumference; and a sleeve, sleeved on the main shaft, located between the main shaft and the inlet section in a radial direction, and spaced apart from the sprocket tooth section in an axial direction to form an inlet annular channel surrounding a portion of the main shaft over the entire circumference between the main shaft, the sprocket and the sleeve, wherein the sprocket further comprises a fluid inlet fluidly connected to the inlet annular channel and a fluid outlet fluidly connected to the outlet annular channel.

[0004] The spline lubrication structure according to the utility model can ensure that the lubricant flows smoothly in the spline between the sprocket and the main shaft, reduce the wear of the spline, significantly extend the life of the spline, and ensure low stress between the sprocket and the shaft shoulder, and between the bushing and the main shaft and the sprocket.

[0005] The spline lubrication structure according to the present invention may have one or more of the following features.

[0006] According to one embodiment, the fluid inlet and the fluid outlet extend radially and are connected to the outside, respectively, so that the fluid can enter from the fluid inlet, flow through the inlet annular channel, the gap between the main shaft and the sprocket tooth segment of the sprocket, the outlet annular channel, and be discharged from the fluid outlet.

[0007] According to one embodiment, an interference fit is formed between the sleeve and the main shaft, between the sleeve and the sprocket, and between the sprocket and the main shaft on the side of the outlet section away from the sprocket tooth section. This ensures that both ends of the fluid channel are closed, so that the lubricant does not leak to other areas.

[0008] According to one embodiment, the fluid inlet is one, and the spline lubrication structure includes a fluid supply unit configured to supply lubricant to the fluid inlet, the fluid supply unit includes a fluid container configured to store lubricant, a fluid nozzle connected to the fluid container and configured to spray the lubricant, and a pipeline connecting the fluid nozzle to the fluid inlet, and the fluid container is fixed to the sprocket. By extending the pipeline, the fluid container is closer to the maintenance space, which is convenient for adding lubricant.

[0009] According to one embodiment, the sprocket comprises a hub flange sleeved on the main shaft and a wheel disc fixed to the hub flange, the sprocket tooth section, the inlet section, the outlet section, the fluid inlet and the fluid outlet are arranged on the hub flange, and the fluid container is fixed to the hub flange at a side of the hub flange away from the wheel disc. A two-piece sprocket is convenient for installation and matching.

[0010] According to one embodiment, there are two fluid outlets, which are evenly arranged on the circumference of the sprocket. This layout helps to quickly discharge waste lubricant, such as waste grease.

[0011] According to one embodiment, the cross-sectional areas of the inlet annular channel and the outlet annular channel are respectively designed to allow a lubricant having a viscosity of less than 150 mm / s to pass through.

[0012] According to one embodiment, the cross-sectional area of ​​the inlet annular channel is greater than or equal to 20 square millimeters, and the cross-sectional area of ​​the outlet annular channel is greater than or equal to 5 square millimeters.

[0013] According to one embodiment, the spindle comprises a shoulder which transitions from a smooth circumferential surface to the spindle tooth section, the outlet section being arranged at the shoulder.

[0014] According to one embodiment, the diameter of the main shaft section that cooperates with the sleeve is smaller than the diameter of the main shaft tooth section, and the inner diameter of the inlet section is larger than the inner diameter of the sprocket tooth section, so as to ensure that there is space for placing the sleeve between the main shaft and the inlet section in the radial direction.

[0015] According to a second aspect of the utility model, an escalator is provided, comprising the above-mentioned spline lubrication structure.

[0016] According to a third aspect of the utility model, a personnel transportation device is proposed, comprising the above-mentioned spline lubrication structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments of the present invention are briefly introduced below. The drawings are only used to show some embodiments of the present invention, but not to limit all embodiments of the present invention thereto.

[0018] Figure 1 is a cross-sectional view of a spline lubrication structure according to the utility model;

[0019] Figure 2 It is a partial enlarged cross-sectional view of the spline lubrication structure according to the utility model;

[0020] Figure 3 It is a cross-sectional view of a sprocket according to the spline lubrication structure of the utility model.

[0021] Reference numerals list

[0022] 1 Spindle

[0023] 11 Spindle gear section

[0024] 2 Sprocket

[0025] 21 Entrance section

[0026] 22 sprocket tooth segments

[0027] 23 Exit section

[0028] 24 fluid inlet

[0029] 25 Fluid outlet

[0030] 26 Hub flange

[0031] 27 Roulette

[0032] 3 Bushing

[0033] 4 Entrance annular channel

[0034] 5. Exit ring channel

[0035] 6 Fluid supply unit DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the technical solution of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described in combination with the drawings of the specific embodiments of the utility model. The same figure marks in the drawings represent the same parts. It should be noted that the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the described embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] Unless otherwise defined, the technical or scientific terms used herein shall have the usual meanings understood by persons of ordinary skill in the field to which the utility model belongs. The words "first", "second" and similar words used in the patent application specification and claims of the utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0038] The present invention will be described in detail below by describing exemplary embodiments.

[0039] The spline lubrication structure according to the utility model is applied to, for example, a personnel transportation device, such as an escalator. The spline lubrication structure according to the utility model comprises a main shaft 1 and a sprocket 2 sleeved on the main shaft 1. Figure 1 As shown, the main shaft 1 extends in the axial direction and includes a main shaft tooth section 11 provided with an internal spline. Figure 2 and 3 As shown, the sprocket 2 includes a sprocket tooth segment 22 provided with an external spline and configured to cooperate with the main shaft tooth segment 11, and a sprocket tooth segment 22 located on one side of the sprocket tooth segment 22 in the axial direction (at Figure 3 The inlet section 21 is located on the left side in the middle, and the other side of the sprocket tooth section 22 is located opposite to the one side in the axial direction (on the left side). Figure 3 The outlet section 23 is shown in the figure on the right side.

[0040] The spline lubrication structure according to the utility model further comprises a sleeve 3, which is sleeved on the main shaft 1, located between the main shaft 1 and the inlet section 21 in the radial direction, and spaced apart from the sprocket tooth section 22 in the axial direction, so as to form an inlet annular channel 4 surrounding a part of the main shaft 1 on the entire circumference between the main shaft 1, the sprocket 2 and the sleeve 3, as shown in FIG. Figure 2 As shown. Here, "over the entire circumference" means that the inlet annular channel 4 surrounds the main shaft 1 within a circumferential range of 360 degrees, so that the lubricating oil can be lubricated within a circumferential range of 360 degrees during lubrication, thereby obtaining an excellent lubrication effect. By adjusting the length and thickness of the bushing, the inlet annular channel 4 is formed at the fluid inlet 24, which is simple and effective. Optionally, the section of the main shaft 1 that cooperates with the sleeve 3 has a smaller diameter than the main shaft tooth section 11, and the inner diameter of the inlet section 21 is larger than the inner diameter of the sprocket tooth section 22, thereby leaving space for placing the sleeve 3 between the main shaft 1 and the inlet section 21 in the radial direction.

[0041] The outlet section 23 of the sprocket 2 is spaced apart from the main shaft 1 in the radial direction to form an outlet annular channel 5 that surrounds a portion of the main shaft 1 over the entire circumference. Optionally, the inner diameter of the outlet section 23 is larger than the inner diameter of the sprocket tooth section 22, so that a gap is formed between the outlet section 23 and the main shaft 1, more specifically, between the outlet section 23 and the main shaft tooth section 11, thereby forming the outlet annular channel 5. Optionally, the main shaft 1 includes a shoulder that transitions from a smooth circumferential surface to the main shaft tooth section 11, and the outlet section 23 is arranged at the shoulder, more specifically, the outlet section 23 is arranged adjacent to the shoulder step on the side of the shoulder step close to the main shaft tooth section 11 (at Figure 2 The outlet annular channel 5 is formed at the fluid outlet 25 by adjusting the length of the spline groove, which does not affect the structural strength of the main shaft 1 or the sprocket 2.

[0042] The cross-sectional areas of the inlet annular channel 4 and the outlet annular channel 5 are respectively designed to allow lubricants with a viscosity of less than 150 mm / s to pass through to meet the lubrication requirements. Preferably, the cross-sectional area of ​​the inlet annular channel 4 is greater than or equal to 20 square millimeters, for example, 20 square millimeters, 22 square millimeters, 24 square millimeters, 26 square millimeters, 28 square millimeters, 30 square millimeters, 32 square millimeters, 34 square millimeters. Preferably, the cross-sectional area of ​​the outlet annular channel 5 is greater than or equal to 5 square millimeters, for example, 5 square millimeters, 6 square millimeters, 7 square millimeters, 8 square millimeters, 9 square millimeters, 10 square millimeters, 11 square millimeters, 12 square millimeters.

[0043] The sprocket 2 further includes a fluid inlet 24 in fluid communication with the inlet annular channel 4 and radially connected to the outside, and a fluid outlet 25 in fluid communication with the outlet annular channel 5 and radially connected to the outside. In this way, a fluid, such as a lubricant, can enter the inlet annular channel 4 from the fluid inlet 24 and fill the entire inlet annular channel 4, and then flow from the inlet annular channel 4 into the gap between the main shaft tooth segment 11 and the sprocket tooth segment 22 within the entire circumference of the main shaft 1, reach the outlet annular channel 5, and be discharged from the fluid outlet 25. Preferably, there is one fluid inlet 24 and two fluid outlets 25 evenly arranged on the circumference of the sprocket 2, and this layout helps to quickly discharge waste lubricants, such as waste grease.

[0044] Preferably, the spline lubrication structure further includes a fluid supply unit 6 configured to supply lubricant to the fluid inlet 24. The fluid supply unit 6 may include a fluid container configured to store lubricant, a fluid nozzle connected to the fluid container and configured to spray the lubricant, and a pipeline connecting the fluid nozzle to the fluid inlet 24. The fluid container is fixed to the sprocket 2, for example, fixed to the outside of the sprocket 2, and the fluid container is closer to the maintenance space by extending the pipeline, which is convenient for adding lubricant. Figure 1-3 In the embodiment of the present invention, the sprocket 2 is a two-piece sprocket 2, including a hub flange 26 mounted on the main shaft 1 and a wheel disc 27 fixed to the hub flange 26, the sprocket tooth section 22, the inlet section 21, the outlet section 23, the fluid inlet 24 and the fluid outlet 25 are all arranged on the hub flange 26, and the fluid container is fixed to the hub flange 26 on the side of the hub flange 26 away from the wheel disc 27, so that the fluid container is closer to the maintenance space, which is convenient for adding lubricant.

[0045] Preferably, an interference fit is formed between the sleeve 3 and the main shaft 1, and between the sleeve 3 and the sprocket 2. The sprocket 2 and the main shaft 1 are at a side of the outlet section 23 away from the sprocket tooth section 22 (at Figure 2 An interference fit is formed (right side in the middle), that is, both ends of the fluid channel are closed, thereby ensuring that the lubricant enters from the fluid inlet 24, passes through the inlet annular channel 4, the gap between the main shaft 1 and the sprocket tooth segment 22, the outlet annular channel 5, and is discharged from the fluid outlet 25 without leaking to other areas.

[0046] The spline lubrication structure according to the utility model can ensure that the lubricant flows smoothly in the spline between the sprocket 2 and the main shaft 1, reduce the wear of the spline, significantly extend the life of the spline, and ensure low stress between the sprocket 2 and the shaft shoulder, and between the bushing and the main shaft 1 and the sprocket 2.

[0047] The exemplary implementation schemes of the spline lubrication structure, escalator and personnel transportation device proposed in the present invention are described in detail above with reference to the preferred embodiments. However, it can be understood by those skilled in the art that, without departing from the concept of the present invention, various modifications and variations can be made to the above-mentioned specific embodiments, and various technical features and structures proposed in the present invention can be combined in various ways without exceeding the protection scope of the present invention.

Claims

1. A spline lubrication structure, characterized in that: include: A main shaft extending in an axial direction and comprising a main shaft tooth section provided with an internal spline; a sprocket, sleeved on the main shaft, comprising a sprocket tooth segment provided with an external spline and configured to cooperate with the main shaft tooth segment, an inlet segment located on one side of the sprocket tooth segment in the axial direction, and an outlet segment located on the other side of the sprocket tooth segment opposite to the one side in the axial direction, wherein the outlet segment is spaced apart from the main shaft in the radial direction to form an outlet annular channel surrounding a portion of the main shaft over the entire circumference; as well as a sleeve, which is sleeved on the main shaft, is located between the main shaft and the inlet section in the radial direction, and is spaced apart from the sprocket tooth section in the axial direction, so as to form an inlet annular channel surrounding a part of the main shaft on the entire circumference between the main shaft, the sprocket and the sleeve, Wherein, the sprocket further includes a fluid inlet in fluid communication with the inlet annular channel and a fluid outlet in fluid communication with the outlet annular channel.

2. The spline lubrication structure according to claim 1, characterized in that: The fluid inlet and the fluid outlet extend radially and are connected to the outside respectively, so that the fluid can enter from the fluid inlet, flow through the inlet annular channel, the gap between the main shaft and the sprocket tooth section of the sprocket, the outlet annular channel, and be discharged from the fluid outlet.

3. The spline lubrication structure according to claim 1, characterized in that: An interference fit is formed between the shaft sleeve and the main shaft, and between the shaft sleeve and the sprocket. An interference fit is formed between the sprocket and the main shaft at a side of the outlet section away from the sprocket tooth section.

4. The spline lubrication structure according to any one of claims 1 to 3, characterized in that: There is one fluid inlet, and the spline lubrication structure includes a fluid supply unit configured to supply lubricant to the fluid inlet, the fluid supply unit includes a fluid container configured to store lubricant, a fluid nozzle connected to the fluid container and configured to spray the lubricant, and a pipeline connecting the fluid nozzle to the fluid inlet, and the fluid container is fixed to the sprocket.

5. The spline lubrication structure according to claim 4, characterized in that: The sprocket includes a hub flange sleeved on the main shaft and a wheel disc fixed to the hub flange, the sprocket tooth section, inlet section, outlet section, fluid inlet and fluid outlet are arranged on the hub flange, and the fluid container is fixed to the hub flange on a side of the hub flange away from the wheel disc.

6. The spline lubrication structure according to any one of claims 1 to 3, characterized in that: There are two fluid outlets, which are evenly arranged on the circumference of the sprocket.

7. The spline lubrication structure according to any one of claims 1 to 3, characterized in that: The cross-sectional areas of the inlet annular channel and the outlet annular channel are respectively designed to allow lubricant with a viscosity of less than 150 mm / s to pass through.

8. The spline lubrication structure according to claim 7, characterized in that: The cross-sectional area of ​​the inlet annular channel is greater than or equal to 20 square millimeters, and the cross-sectional area of ​​the outlet annular channel is greater than or equal to 5 square millimeters.

9. The spline lubrication structure according to any one of claims 1 to 3, characterized in that: The spindle comprises a shoulder which transitions from a smooth circumferential surface to the spindle tooth section, and the outlet section is arranged at the shoulder.

10. The spline lubrication structure according to any one of claims 1 to 3, characterized in that: The diameter of the section of the main shaft that cooperates with the bushing is smaller than the diameter of the main shaft tooth section, and the inner diameter of the inlet section is larger than the inner diameter of the sprocket tooth section.

11. An escalator comprising a spline lubrication structure according to any one of claims 1 to 10.

12. A personnel transportation device comprising a spline lubrication structure according to any one of claims 1-10.

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