Transmission shaft safety protection device

Abstract

The utility model discloses a transmission shaft safety protection device which comprises a transmission shaft, a protection cover assembly arranged on the outer side of the transmission shaft in a sleeving mode, a plurality of bearing assemblies arranged between the protection cover assembly and the transmission shaft and an expansion sleeve assembly. The protective cover assembly comprises an outer protective cover and an inner protective cover which is arranged on the inner side of one end of the outer protective cover in a sleeving mode and detachably connected through a plurality of connection limiting assemblies. The bearing assembly comprises an annular bearing outer sleeve, a bearing inner sleeve and a bearing arranged between the bearing outer sleeve and the bearing inner sleeve. The expansion assembly comprises an expansion ring; wherein the bearing outer sleeve is matched with the inner side of the inner protective cover and is detachably connected with the inner side of the inner protective cover, and the expansion ring is arranged between the bearing inner sleeve and the outer circle of the transmission shaft in an expansion mode. The safety protection device is simple in structure, convenient to mount and dismount, capable of achieving effective safety protection on the telescopic transmission shaft running at a high speed, capable of conducting oil injection maintenance on the transmission shaft under the condition that the protection device body is not dismounted, and high in practicability.

Description

TECHNICAL FIELD

[0001] The utility model belongs to transmission shaft protection technical field, concretely relates to a transmission shaft safety device. BACKGROUND

[0002] Transmission shaft is an important component of power transmission widely used in various mechanical equipment, which is often in high-speed operation state. In order to protect the surrounding equipment and on-site staff safety, avoid the accident such as the flying out of rotating parts, it is usually necessary to set up safety protection facilities for transmission shaft.

[0003] At present, in the transmission shaft or shaft coupling protection field, the protection types are various, which can be mainly divided into external non-contact type and body direct protection type. The external non-contact type is the most common, which generally sets up metal protective net, protective plate, protective cover and the like on the periphery of transmission shaft or shaft coupling, and is fixed on the ground or other stationary objects by bolts, has the advantages of simple structure and convenient operation, but occupies larger space, so it is not suitable for occasions with limited space. The body direct protection type generally sets up protective cover on the body of transmission shaft or shaft coupling, and the protective cover needs to be matched with the structure of transmission shaft or shaft coupling. The characteristic of this protection is compact structure and strong speciality, but the universality is deficient, especially in the protection of high-speed transmission shaft with telescopic requirement. In addition, the existing body direct protection type device also has defects such as inconvenient oiling. CONTENT OF THE UTILITY MODEL

[0004] In view of the defects in the background art, the utility model provides a transmission shaft safety device, which can provide effective safety protection for telescopic rotating parts, especially high-speed rotating parts, and can maintain the transmission shaft without disassembling the body of the protective device.

[0005] The technical scheme for solving the technical problems of the utility model is as follows:

[0006] According to one aspect of the present application, a transmission shaft safety device is provided, which comprises a transmission shaft, a protective cover assembly arranged outside the transmission shaft, a plurality of bearing assemblies arranged between the protective cover assembly and the transmission shaft, and an expansion sleeve assembly. The protective cover assembly comprises an outer protective cover and an inner protective cover arranged inside one end of the outer protective cover and detachably connected through a plurality of connecting and limiting assemblies. The bearing assembly comprises a ring-shaped bearing outer sleeve, a bearing inner sleeve, and a bearing arranged between the bearing outer sleeve and the bearing inner sleeve. The expansion assembly comprises an expansion ring. The bearing outer sleeve is detachably connected with the inner side of the inner protective cover, and the expansion ring is arranged between the bearing inner sleeve and the outer circle of the transmission shaft.

[0007] Further, a plurality of first bosses are arranged at the same circumferential position near the end of one side of the outer protective cover, and a first limiting screw hole is formed through the first boss and the outer protective cover; a plurality of second limiting holes corresponding to the first limiting screw hole are formed at a plurality of circumferential positions of the inner protective cover; the outer protective cover and the inner protective cover are gap-fitted, and the first limiting screw hole and the second limiting hole are connected through the connecting and limiting assembly.

[0008] Further, the connecting and limiting assembly comprises a limiting pin installed in the first limiting screw hole and the second limiting hole, the limiting pin comprises a head cylindrical segment, an outer threaded segment and a tail end arranged from one side to the other side, the head cylindrical segment is inserted into the second limiting hole, and the outer threaded segment is threadedly connected with the first limiting screw hole.

[0009] Further, a matching nut is threadedly arranged on the outer threaded segment, and the nut locks the limiting pin in the first limiting screw hole.

[0010] Further, the nut comprises a first nut and a second nut.

[0011] Further, a plurality of first oil injection windows and second oil injection windows are formed on the outer protective cover and the inner protective cover respectively, and an oil injection window cover is arranged at each of the first oil injection window and the second oil injection window.

[0012] Further, a plurality of second bosses are arranged on the outer circumference of the inner protective cover.

[0013] Further, the bearing comprises a bearing outer ring, a bearing inner ring, a rolling body arranged between the bearing outer ring and the bearing inner ring, and a retainer arranged at the rolling body; a plurality of corresponding bearing assembly limiting holes and first screw holes are formed on the inner protective cover and the bearing outer sleeve respectively, and each of the corresponding bearing assembly limiting hole and the first screw hole is detachably connected through a first screw; a first stop opening is formed on one side of the inner circle of the bearing outer sleeve, a plurality of second screw holes are formed on the end face near the first stop opening in the circumferential direction, a second stop opening corresponding to the first stop opening is arranged on one side of the inner circle of the bearing inner sleeve, and a retainer ring groove is formed on the second stop opening near the end face of the side; the bearing outer ring and the bearing inner ring of the bearing are arranged at the first stop opening and the second stop opening respectively, a retainer ring is arranged in the retainer ring groove, the side face of the retainer ring is in limiting contact with the bearing inner ring, a first pressing plate is arranged on the end face of the first stop opening of the bearing outer sleeve, the first pressing plate is connected and fixed with the second screw hole through a second screw, and the first pressing plate is in limiting contact with the bearing outer ring.

[0014] Further, the third screw holes are formed in the bearing inner sleeve away from the second stopper side end face; the bearing inner sleeve and the expansion ring cooperation face are respectively provided with an inner taper face and an outer taper face; the expansion ring outer side is provided with a second pressing plate for expanding the expansion ring between the bearing inner sleeve and the transmission shaft outer circle; the second pressing plate is connected and fixed with the third screw holes through the third screw.

[0015] Compared with the prior art, the transmission shaft safety protection device has the advantages of simple structure, convenient installation and dismounting, and safety protection of the telescopic transmission shaft through the inner and outer protective covers and the connecting and limiting assembly; the high-speed transmission shaft safety protection is realized through the bearing assembly and the expansion sleeve assembly; the transmission shaft can be maintained by online oiling through the oiling window, and the operation is easy and convenient. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The figure is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 The figure is a schematic diagram of the structure of the outer protective cover in the utility model;

[0018] Figure 3 The figure is a schematic diagram of the structure of the inner protective cover in the utility model;

[0019] Figure 4 The figure is a schematic diagram of the side view structure of the inner protective cover in the utility model;

[0020] Figure 5 The figure is a schematic diagram of the structure of the connecting and limiting assembly in the utility model;

[0021] Figure 6 The figure is a schematic diagram of the structure of the bearing outer ring in the utility model;

[0022] Figure 7 The figure is a schematic diagram of the structure of the bearing inner ring in the utility model;

[0023] Figure 8 The figure is a schematic diagram of the structure of the expansion ring in the utility model;

[0024] Figure 9 The figure is a schematic diagram of the connection of the protective cover assembly, the bearing assembly, the expansion assembly and the transmission shaft in the utility model;

[0025] In the diagram: 1. Protective cover assembly; 11. Outer protective cover; 111. First boss; 112. First limiting screw hole; 113. First oil filling window; 12. Inner protective cover; 121. Second limiting hole; 122. Second oil filling window; 123. Second boss; 124. Bearing assembly limiting hole; 13. Connecting limiting assembly; 131. Head cylindrical section; 132. External thread section; 133. First nut; 134. Second nut; 135. Tail end; 2. Bearing assembly; 21. Bearing outer sleeve; 211. First stop; 21 2. Second threaded hole; 213. First threaded hole; 22. Bearing inner sleeve; 221. Second stop; 222. Third threaded hole; 223. Inner conical surface; 224. Retaining ring groove; 23. Bearing; 231. Bearing outer ring; 232. Bearing inner ring; 233. Rolling element; 234. Cage; 24. First screw; 25. Second screw; 26. First pressure plate; 27. Retaining ring; 3. Expansion sleeve assembly; 31. Expansion ring; 311. Outer conical surface; 32. Second pressure plate; 33. Third screw; 4. Drive shaft; 5. Oil injection window cover. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by those skilled in the art to which this disclosure pertains. The terms "upper," "lower," "left," "right," "front," "back," "inside," and "outside" used in the specification and claims of this patent application are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship also changes accordingly. Any aspects not detailed in the present utility model are well-known technologies to those skilled in the art.

[0027] like Figures 1-9 As shown, this application provides a drive shaft safety protection device, including a protective cover assembly 1, a bearing assembly 2, a shrink sleeve assembly 3, and a drive shaft 4. The protective cover assembly 1 is sleeved on the outside of the drive shaft 4, the bearing assembly 2 is disposed between the protective cover assembly 1 and the drive shaft 4, and the shrink sleeve assembly 3 is tightly disposed between the outer circle of the drive shaft 4 and the bearing assembly 2. In use, the drive shaft 4 rotates inside the protective cover assembly 1 through the shrink sleeve assembly 3 and the bearing assembly 2, and the protective cover assembly 1 provides protection.

[0028] The protective cover assembly 1 includes an outer protective cover 11 and an inner protective cover 12. The outer protective cover 11 is sleeved on the outside of one end of the inner protective cover 12 and is detachably connected by a number of connecting and limiting components 13, thereby restricting the relative movement and rotation of the inner and outer protective covers.

[0029] In a preferred embodiment, one or more first protrusions 111 are provided on one side of the outer protective cover 11 near the end position. When there are multiple first protrusions 111, they are evenly distributed circumferentially along the position. Each first protrusion 111 and the outer protective cover 11 are provided with a first limiting screw hole 112. One or more second limiting holes 121 corresponding to the first limiting screw holes 112 are provided on the inner protective cover 12. The outer protective cover 11 and the inner protective cover 12 are clearance-fitted to facilitate the free axial movement of the outer protective cover. The corresponding first limiting screw holes 112 and second limiting holes 121 are connected by a connecting limiting component 13.

[0030] According to different limiting position requirements, as a preferred embodiment, one or more second limiting holes 121 corresponding to the first limiting screw hole 112 are respectively opened at different circumferential positions in the axial direction of the inner protective cover 12. The first limiting screw hole 112 is connected to the corresponding second limiting holes 121 at different axial positions by the connecting limiting component 13 to meet the need for safety protection of the telescopic transmission shaft.

[0031] To facilitate the lubrication of the drive shaft 4, the outer protective cover 11 and the inner protective cover 12 are respectively provided with a number of first lubrication windows 113 and second lubrication windows 122. Each of the first lubrication windows 113 and the second lubrication windows 122 is provided with a lubrication window cover 5. When lubrication is required, the lubrication window cover 5 can be opened. Each lubrication window is arranged according to the lubrication point of the drive shaft 4. The lubrication windows can be rectangular, circular or other irregular shapes. The lubrication window cover 5 is adapted to each lubrication window.

[0032] In a preferred embodiment, the inner protective cover 12 is provided with a plurality of second protrusions 123 on its outer circumference. The second protrusions 123 can be circular or square, etc., so that the second protrusions can be fixed to the external foundation or stationary components using rigid connectors.

[0033] As a preferred embodiment, the coupling limiting assembly 13 comprises a limiting pin installed in the corresponding first limiting hole 112 and second limiting hole 121, the limiting pin comprises a head cylindrical segment 131, an external thread segment 132 and a tail end 135 arranged from one side to the other side, the head cylindrical segment 131 is inserted into the second limiting hole 121, and the external thread segment 132 is threadedly connected with the first limiting hole 112. As a further preferred embodiment, a corresponding nut is threadedly arranged on the external thread segment 132, and the nut locks the limiting pin in the first limiting hole 112. As a further preferred embodiment, the nut comprises a first nut 133 and a second nut 134, and the double-nut arrangement can prevent the nut from loosening while effectively locking the limiting pin in the first limiting hole 112.

[0034] The bearing assembly 2 is arranged along the transmission shaft 4 in the axial direction according to the specification of the transmission shaft 4, each bearing assembly 2 comprises a ring-shaped bearing outer sleeve 21 and a bearing inner sleeve 22, and a bearing 23 arranged between the bearing outer sleeve 21 and the bearing inner sleeve 22, the bearing 23 comprises a bearing outer ring 231, a bearing inner ring 232, a rolling body 233 arranged between the bearing outer ring 231 and the bearing inner ring 232, and a retainer 234 arranged at the rolling body 233; the outer circle of the bearing outer sleeve 21 is arranged with a small gap on the inner side of the inner protective cover 12 and is detachably connected, for limiting the rotation of the bearing outer sleeve 21.

[0035] More specifically, the inner protective cover 12 and the bearing outer sleeve 21 are respectively circumferentially arranged with a plurality of corresponding radial bearing assembly limiting holes 124 and first screw holes 213, and each corresponding bearing assembly limiting hole 124 and first screw hole 213 are detachably connected through a first screw 24; the inner circle of the bearing outer sleeve 21 is arranged with a first stopper 211 on one side, and the end face close to the first stopper 211 is circumferentially arranged with a plurality of axial second screw holes 212; the inner circle of the bearing inner sleeve 22 is arranged with a second stopper 221 corresponding to the first stopper 211 on one side, and the second stopper 221 is arranged with a retaining ring groove 224 close to the position of the side end face; the bearing outer ring 231 and the bearing inner ring 232 of the bearing 23 are respectively arranged at the first stopper 211 and the second stopper 221, and the retaining ring groove 224 is arranged with a retaining ring 27, the side face of the retaining ring 27 is in limiting contact with the bearing inner ring 232, and the bearing outer sleeve 21 is arranged with a first pressing plate 26 on the side end face of the first stopper 211, the first pressing plate 26 is connected and fixed with the second screw hole 212 through a second screw 25, and the first pressing plate 26 is in limiting contact with the bearing outer ring 231.

[0036] The expansion sleeve assembly 3 comprises an expansion ring 31 arranged between the bearing inner sleeve 22 and the outer circle of the transmission shaft 4, and more specifically, a plurality of third screw holes 222 are axially arranged on the circumferential surface of the bearing inner sleeve 22 away from the side end face of the second stopper 221; the fitting surfaces of the bearing inner sleeve 22 and the expansion ring 31 are respectively provided with an inner taper surface 223 and an outer taper surface 311 matched with each other; the outer side of the expansion ring 31 is provided with a second pressing plate 32 for expanding the expansion ring 31 between the bearing inner sleeve 22 and the outer circle of the transmission shaft 4; the second pressing plate 32 is connected and fixed with the third screw holes 222 through third screws 33; and the inward force is applied to the expansion ring 31 through the second pressing plate 32, so that the expansion ring 31 is simultaneously clamped with the bearing inner sleeve 22 and tightly clamped with the outer circle of the transmission shaft.

Claims

1. A drive shaft safety guard comprising a drive shaft (4), characterized in that, Also include: The protective cover assembly (1) is sleeved outside the transmission shaft (4), the protective cover assembly (1) includes outer protective cover (11) and the inner protective cover (12) that is sleeved inside one end of the outer protective cover (11) and is connected through a plurality of connecting limiting components (13); A plurality of bearing assemblies (2) are arranged between the protective cover assembly (1) and the transmission shaft (4), the bearing assembly (2) includes annular bearing outer sleeve (21), bearing inner sleeve (22) and bearing (23) arranged between the bearing outer sleeve (21) and the bearing inner sleeve (22);And The expansion sleeve assembly (3) includes an expansion ring (31); Wherein: the bearing outer sleeve (21) is matched with the inner side of the inner protective cover (12) and is detachably connected, and the expansion ring (31) is expanded and arranged between the bearing inner sleeve (22) and the outer circle of the transmission shaft (4).

2. A driveshaft safety device according to claim 1, wherein, The outer protective cover (11) is provided with a plurality of first bosses (111) at the same circumferential position near one side of the end portion, and the first boss (111) and the outer protective cover (11) are provided with a first limiting screw hole (112) penetratingly arranged; a plurality of second limiting holes (121) corresponding to the first limiting screw hole (112) are arranged at a plurality of circumferential positions of the inner protective cover (12); the outer protective cover (11) and the inner protective cover (12) are gap matched, and the first limiting screw hole (112) and the second limiting hole (121) are connected through the connecting limiting component (13).

3. A driveshaft safety device according to claim 2, wherein, The connecting limiting component (13) includes a limiting pin mounted in the corresponding first limiting screw hole (112) and the second limiting hole (121), the limiting pin includes a head cylindrical section (131), an outer threaded section (132) and a tail end (135) arranged from one side to the other side, the head cylindrical section (131) is inserted into the second limiting hole (121), and the outer threaded section (132) is threadedly connected with the first limiting screw hole (112).

4. A driveshaft safety device according to claim 3, wherein, The outer threaded section (132) is threadedly provided with a matched nut, and the nut locks the limiting pin in the first limiting screw hole (112).

5. A driveshaft safety device according to claim 4, wherein, The nut includes a first nut (133) and a second nut (134).

6. A driveshaft safety device according to claim 1, wherein, A plurality of first oil injection windows (113) and second oil injection windows (122) are respectively arranged on the outer protective cover (11) and the inner protective cover (12), and an oil injection window cover (5) is arranged at the first oil injection window (113) and the second oil injection window (122) respectively.

7. A driveshaft safety device according to claim 1, wherein, The inner protective cover (12) is provided with a plurality of second bosses (123) on the outer circumference.

8. A driveshaft safety device according to any one of claims 1 to 7, wherein, The bearing (23) comprises a bearing outer ring (231), a bearing inner ring (232), rolling elements (233) arranged between the bearing outer ring (231) and the bearing inner ring (232), and a retainer (234) arranged at the rolling elements (233); the inner protective cover (12) and the bearing sleeve (21) are respectively provided with a plurality of corresponding bearing assembly limiting holes (124) and first screw holes (213) in the circumferential direction, and each corresponding bearing assembly limiting hole (124) and first screw hole (213) are detachably connected by a first screw (24); a first stop opening (211) is arranged on one side of the inner circle of the bearing sleeve (21), and a plurality of second screw holes (212) are arranged on the end face close to the first stop opening (211) in the circumferential direction; the bearing inner sleeve (22) is provided with a second stop opening (221) corresponding to the first stop opening (211) on one side of the inner circle, and a check ring groove (224) is arranged at the second stop opening (221); the bearing outer ring (231) and the bearing inner ring (232) of the bearing (23) are arranged at the first stop opening (211) and the second stop opening (221) respectively, the check ring groove (224) is provided with a check ring (27), the side surface of the check ring (27) is in limiting contact with the bearing inner ring (232), and the bearing sleeve (21) is provided with a first pressing plate (26) on the end face on the side of the first stop opening (211), the first pressing plate (26) is connected and fixed with the second screw hole (212) by a second screw (25), and the first pressing plate (26) is in limiting contact with the bearing outer ring (231).

9. A driveshaft safety device according to claim 8, wherein, A plurality of third screw holes (222) are arranged on the end face of the bearing inner sleeve (22) away from the second stop opening (221) in the circumferential direction; the bearing inner sleeve (22) and the expansion ring (31) are respectively provided with matching inner and outer tapered surfaces (223) and (311) on the matching surfaces, the expansion ring (31) is provided with a second pressing plate (32) on the outer side, the second pressing plate (32) is arranged to expand the expansion ring (31) between the bearing inner sleeve (22) and the outer circle of the transmission shaft (4), and the second pressing plate (32) is connected and fixed with the third screw hole (222) by a third screw (33).

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