A drive shaft with a protection device

Abstract

The utility model discloses a drive shaft with protection device, including symmetrical two fixed sleeves, detachable installation positioning piece opposite of two fixed sleeves, detachable connection two semicircular protective cover opposite of two positioning pieces, drive shaft rotation is connected in two fixed sleeves, and the opposite surface clamping of two protective cover has the clearance between the inner wall of protective cover and drive shaft, and the recessed mounting groove is equipped in the middle part of protective cover, and the bottom wall of mounting groove is equipped with a plurality of ventilation holes that communicate with the inboard of protective cover, and the mounting groove is clamped with the air -blowing device, and the air outlet of air -blowing device faces the ventilation hole. The ventilation hole is equipped on the protective cover, can heat dissipation to drive shaft, and the protective cover can also select and install the air -blowing device, and the air -blowing device is blown to drive shaft, and the heat dissipation effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of transmission shaft technology, specifically a transmission shaft with a protective device. Background Technology

[0002] The driveshaft is a high-speed, low-support rotating body and an important component of automobiles. During the operation of a car, the driveshaft transmits torque while its angle and length are constantly changing. To protect the driveshaft, a protective structure is generally installed.

[0003] A search revealed a Chinese utility model patent with publication number CN221049489U, which discloses a novel transmission shaft protection structure. According to its description, when protection is required, a limiting plate is inserted into the limiting installation groove. When the positions of threaded slot one and threaded slot two correspond, they are connected by rotating bolts, thereby fixing protective cover one and protective cover two together to protect sleeve body one, sleeve body two and shaft tube body.

[0004] However, the drive shaft protection device in the above patent and the current drive shaft protection device both have the following problems: (1) The protective cover puts the drive shaft in a fully enclosed state. Although it plays a protective role, it cannot dissipate heat from the drive shaft; (2) The protective cover needs to be fixed on the drive shaft, which causes the protective cover to rotate with the rotation of the drive shaft, which increases the weight of the drive shaft and affects the operation of the drive shaft. Utility Model Content

[0005] In view of the shortcomings of the existing technology, this utility model provides a drive shaft with a protective device to solve the problems of poor heat dissipation effect of the current protective cover and the burden on the movement of the drive shaft.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0007] A drive shaft with a protective device includes two symmetrical fixed sleeves, a positioning component detachably mounted on the opposite face of the two fixed sleeves, and two semi-circular protective covers detachably connected to the opposite face of the two positioning components. The drive shaft is rotatably connected to the two fixed sleeves, and the opposite faces of the two protective covers are engaged. There is a gap between the inner wall of the protective cover and the drive shaft. A recessed mounting groove is provided in the middle of the protective cover. The bottom wall of the mounting groove is provided with several ventilation holes communicating with the inner side of the protective cover. A blower is engaged in the mounting groove, and the air outlet of the blower faces the ventilation holes.

[0008] Preferably, one of the protective covers has a plurality of first slots on its mating surface, and the other protective cover has a locking block that matches the first slots on its mating surface.

[0009] The above technical solution allows the two protective covers to be connected into a whole by the cooperation of the locking block and the first locking slot, which improves the stability of the two protective covers and also facilitates disassembly.

[0010] Preferably, the blower includes a semi-circular housing with mounting plates at both ends. Recessed mounting platforms are located at both ends of the mounting groove. The mounting plates are connected to the mounting platforms by screws. An equal-length box is located outside the housing, positioned on the central axis of the housing. A vertical first partition is located inside the box, dividing the housing into a first cavity and a second cavity. An air outlet is located at the bottom of the second cavity, and a dustproof net is installed at the air outlet. A horizontal second partition is located inside the second cavity. A transmission rod is rotatably connected to one side wall of the box and the first partition. Above the second partition, multiple first bevel gears are fixed on the transmission rod. Several rotating shafts are rotatably connected to the second partition, and each rotating shaft is fixed with a fan blade. The upper end of the rotating shaft extends to the top of the second partition, and a second bevel gear matching the first bevel gear is fixed to the extended end. The first bevel gear meshes with the corresponding second bevel gear. A control board, a stepper motor, and a battery are installed in the first cavity. Wires are connected to the control board, and electrical connectors are connected to the wires. The control board, stepper motor, and battery are electrically connected. The motor shaft of the stepper motor is connected to one end of the transmission rod.

[0011] The above technical solution uses a four-pin connector for connection to an external controller, supporting power supply, PWM speed control, and speed feedback. Additionally, a battery can serve as a backup power source when external power is unavailable.

[0012] Preferably, a cover plate is connected to the housing by screws, and the cover plate is provided with a plurality of heat dissipation holes communicating with the first cavity.

[0013] The above technical solution can dissipate heat from the stepper motor, control board, and battery through the heat dissipation holes on the cover plate.

[0014] Preferably, the fixing sleeve includes an integrally formed sleeve, flange, and fixing ring. The flange is located at opposite ends of the two sleeves, and the fixing ring is located on the outer wall of the sleeve. A second groove is formed between the fixing ring and the sleeve. The second grooves of the two fixing sleeves are arranged opposite to each other. The fixing ring has several first screw holes. The positioning element includes an integrally formed retaining ring, a bearing part, and a connecting part. The retaining ring is arranged opposite to the bearing part, and the connecting part is perpendicular to the bearing part. The retaining ring has a second screw hole that mates with the first screw hole. The retaining ring is embedded in the second groove and fixed to the fixing ring by screws. The connecting part has a third screw hole, and the end face of the protective cover has a fourth screw hole. The end of the protective cover is placed on the bearing part, and the end face of the protective cover is fixed to the connecting part by screws. The inner diameter of the protective cover is larger than the inner diameter of the retaining ring.

[0015] In the above technical solution, the two ends of the protected drive shaft are rotatably mounted inside the sleeve, which is fixed to the external equipment by flanges. The positioning element is fixed to the fixing sleeve by screws, and the protective cover is fixed to the positioning element by screws. The protective cover is composed of two semi-circular parts joined together for easy disassembly. Furthermore, the inner diameter of the protective cover is larger than the inner diameter of the retaining ring. Therefore, when the protective cover is installed on the load-bearing part, there is a certain gap between the inner wall of the protective cover and the drive shaft, thereby separating the drive shaft from the protective cover and reducing the impact of the protective cover on the operation of the drive shaft.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] (1) The protective cover can protect the drive shaft, and the protective cover is equipped with ventilation holes to dissipate heat from the drive shaft. The protective cover can also be equipped with a blower to blow air onto the drive shaft to improve the heat dissipation effect.

[0018] (2) There is a gap between the protective cover and the drive shaft, and the drive shaft is rotatably connected in the fixed sleeve. Therefore, the protective cover will not rotate with the drive shaft and will not increase the burden on the drive shaft, thus reducing the impact of the protective cover on the operation of the drive shaft. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the present invention after removing one protective cover;

[0020] Figure 2 This is a cross-sectional view of the present invention;

[0021] Figure 3 This is a schematic diagram of a blower device;

[0022] Figure 4 This is a sectional view of the box body;

[0023] In the diagram: 1-Fixing sleeve, 101-Sleeve, 102-Flange, 103-Fixing ring, 104-Second slot, 2-Positioning component, 201-Snap ring, 202-Bearing part, 203-Connecting part, 3-Protective cover, 4-Drive shaft, 5-Mounting groove, 6-Ventilation hole, 7-Blowing device, 701-Housing shell, 702-Mounting plate, 703-Box body, 704-First partition, 705-First cavity, 706-Second cavity, 707-Dustproof net, 708-Second partition, 709-Drive rod, 710-First bevel gear, 711-Rotating shaft, 712-Fan blade, 713-Second bevel gear, 714-Control board, 715-Stepper motor, 716-Battery, 717-Electrical connector, 8-First slot, 9-Mounting platform. Detailed Implementation

[0024] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1

[0026] Please see Figures 1-4 A drive shaft with a protective device includes two symmetrical fixed sleeves 1, a positioning element 2 detachably installed on the opposite face of the two fixed sleeves 1, and two semi-circular protective covers 3 detachably connected to the opposite face of the two positioning elements 2. The protected drive shaft 4 is rotatably connected inside the two fixed sleeves 1.

[0027] Specifically, the fixing sleeve 1 includes an integrally formed sleeve 101, flange 102 and fixing ring 103. The flange 102 is disposed at opposite ends of the two sleeves 101. The fixing ring 103 is located on the outer wall of the sleeve 101. A second groove 104 is formed between the fixing ring 103 and the sleeve 101. The second grooves 104 of the two fixing sleeves 1 are arranged opposite to each other. A plurality of first screw holes are opened on the fixing ring 103. The positioning component 2 includes an integrally formed retaining ring 201, a supporting part 202, and a connecting part 203. The retaining ring 201 is arranged in opposite directions to the supporting part 202, and the connecting part 203 is perpendicular to the supporting part 202. The retaining ring 201 has a second screw hole that mates with the first screw hole. The retaining ring 201 is embedded in the second retaining groove 104 and fixed to the fixing ring 103 by screws. The connecting part 203 has a third screw hole, and the end face of the protective cover 3 has a fourth screw hole. The end of the protective cover 3 is placed on the supporting part 202, and the end face of the protective cover 3 is fixed to the connecting part 203 by screws. The inner diameter of the protective cover 3 is larger than the inner diameter of the retaining ring 201.

[0028] The dimensions of the fixing sleeve, positioning component, and protective cover described in this embodiment need to be customized according to the length and diameter of the drive shaft. The fixing sleeve can be made of metal, while the positioning component and protective cover can be made of plastic.

[0029] The two ends of the protected drive shaft 4 are rotatably mounted inside the sleeve 101. The sleeve 101 is fixed to an external device (such as a trolley with a control system) via the flange 102. The positioning element 2 is fixed to the fixing sleeve 1 with screws. The protective cover 3 is fixed to the positioning element 2 with screws, and the protective cover 3 is composed of two semi-circles spliced ​​together. During disassembly, the screws are removed first, and then the protective cover 3 is removed from the positioning element 2, making disassembly convenient. In addition, the inner diameter of the protective cover 3 is larger than the inner diameter of the retaining ring 201. Therefore, when the protective cover 3 is installed on the bearing part 202, there is a certain gap between the inner wall of the protective cover 3 and the drive shaft 4, thereby separating the drive shaft 4 from the protective cover 3 and reducing the impact of the protective cover 3 on the operation of the drive shaft 4.

[0030] One of the protective covers 3 has multiple first slots 8 on its mating surface, and the other protective cover 3 has a locking block that matches the first slots 8 on its mating surface (not shown in the attached figure). Through the cooperation of the first slots and the locking block, the opposite surfaces of the two protective covers 3 can be locked together.

[0031] The protective cover 3 has a recessed mounting groove 5 in the middle, and the bottom wall of the mounting groove 5 has several ventilation holes 6 that communicate with the inside of the protective cover. The ventilation holes 6 on the protective cover can dissipate heat from the drive shaft.

[0032] A blower device 7 is snapped into the mounting groove 5, with its air outlet facing the ventilation hole 6. The blower device 7 includes a semi-circular housing 701, with mounting plates 702 at both ends. Recessed mounting platforms 9 are located at both ends within the mounting groove 5. The mounting plates 702 are connected to the mounting platforms 9 by screws. An equal-length box 703 is located outside the housing 701, situated on its central axis. A vertical first partition 704 divides the housing into a first cavity 705 and a second cavity 706. An air outlet is located at the bottom of the second cavity 706, with a dustproof net 707 installed thereon. A horizontal second partition 708 is located within the second cavity 706. A transmission rod 709 is rotatably connected to one side wall of the box 703 and the first partition 704. The transmission rod 709 is located within the second partition. Above the plate 708, multiple first bevel gears 710 are fixed on the transmission rod 709. Several rotating shafts 711 are rotatably connected to the second partition 708. Each rotating shaft 711 is fixed with a fan blade 712. The upper end of the rotating shaft 711 extends to the upper part of the second partition 708, and a second bevel gear 713 matching the first bevel gear is fixed at the extended end. The first bevel gear 710 meshes with the corresponding second bevel gear 713. A control board 714, a stepper motor 715, and a battery 716 are installed in the first cavity 705. The control board 714 is electrically connected with wires, and electrical connectors 717 are connected to the wires. The control board 714, the stepper motor 715, and the battery 716 are electrically connected. The motor shaft of the stepper motor 715 is connected to one end of the transmission rod 709.

[0033] A blower device 7 can also be optionally installed on the protective cover 3, which is mounted in the mounting slot 5 with screws. The electrical connector 717 uses a four-pin connector, which plugs into the control system of the trolley, supporting power supply, PWM speed regulation, and speed feedback, so that the trolley can control the operation of the stepper motor. In addition, when the external power supply is interrupted, the battery can also serve as a backup power source for the stepper motor.

[0034] When the blower device 7 is working, the stepper motor 715 works, driving the transmission rod 709 to rotate. The transmission rod 70 drives all the second bevel gears 713 to rotate through the first bevel gear 710. The second bevel gears 713 drive the rotating shaft 711 to rotate, thereby driving all the fan blades 712 to rotate together, thus blowing air into the protective cover 3. The air enters the protective cover 3 through the ventilation hole 6, thereby dissipating heat from the transmission shaft 4.

[0035] Example 2

[0036] Based on Embodiment 1, a cover plate 718 is connected to the housing 701 by screws. The cover plate 718 is provided with several heat dissipation holes 719 communicating with the first cavity. The heat dissipation holes on the cover plate can dissipate heat from the stepper motor, control board, and battery.

[0037] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A drive shaft with a protective device, characterized in that: It includes two symmetrical fixed sleeves (1), a positioning component (2) that can be detachably installed on the opposite side of the two fixed sleeves (1), and two semi-circular protective covers (3) that can be detachably connected to the opposite side of the two positioning components (2). The drive shaft (4) is rotatably connected inside the two fixed sleeves (1). The opposite sides of the two protective covers (3) are snapped together. There is a gap between the inner wall of the protective cover (3) and the drive shaft (4). The middle part of the protective cover (3) is provided with a recessed mounting groove (5). The bottom wall of the mounting groove (5) is provided with several ventilation holes (6) that communicate with the inside of the protective cover. A blower (7) is snapped into the mounting groove (5). The air outlet of the blower (7) faces the ventilation hole (6).

2. A transmission shaft with a protective device according to claim 1, characterized in that: One of the protective covers (3) has a plurality of first slots (8) on its mating surface, and the other protective cover (3) has a locking block that matches the first slots (8) on its mating surface.

3. A transmission shaft with a protective device according to claim 2, characterized in that: The blower (7) includes a semi-circular housing (701), with mounting plates (702) at both ends of the housing (701). Recessed mounting platforms (9) are located at both ends of the mounting groove (5). The mounting plates (702) are connected to the mounting platforms (9) by screws. An equal-length box (703) is provided outside the housing (701), located on the central axis of the housing (701). A vertical first partition is provided inside the box (703). The plate (704) divides the interior of the housing into a first cavity (705) and a second cavity (706) by a first partition (704). The bottom of the second cavity (706) is provided with an air outlet, and a dustproof net (707) is installed at the air outlet. The second cavity (706) is provided with a transverse second partition (708). A transmission rod (709) is rotatably connected to one side wall of the box (703) and the first partition (704). The transmission rod (709) is located at the first partition. Above the second partition (708), a plurality of first bevel gears (710) are fixed on the transmission rod (709). A plurality of rotating shafts (711) are rotatably connected to the second partition (708). Each rotating shaft (711) is fixed with a fan blade (712). The upper end of the rotating shaft (711) extends above the second partition (708), and a second bevel gear (713) matching the first bevel gears is fixed to the extended end. Engaging with the corresponding second bevel gear (713), the first cavity (705) is equipped with a control board (714), a stepper motor (715), and a battery (716). The control board (714) is electrically connected to a wire, and an electrical connector (717) is connected to the wire. The control board (714), the stepper motor (715), and the battery (716) are electrically connected. The motor shaft of the stepper motor (715) is connected to one end of the transmission rod (709).

4. A drive shaft with a protective device according to claim 3, characterized in that: A cover plate (718) is connected to the housing (701) by screws, and the cover plate (718) is provided with a number of heat dissipation holes (719) communicating with the first cavity.

5. A drive shaft with a protective device according to claim 4, characterized in that: The fixing sleeve (1) includes an integrally formed sleeve (101), a flange (102) and a fixing ring (103). The flange (102) is located at opposite ends of the two sleeves (101), and the fixing ring (103) is located on the outer wall of the sleeve (101). A second groove (104) is formed between the fixing ring (103) and the sleeve (101). The second grooves (104) of the two fixing sleeves (1) are arranged opposite to each other. A plurality of first screw holes are provided on the fixing ring (103).

6. A drive shaft with a protective device according to claim 5, characterized in that: The positioning component (2) includes an integrally formed retaining ring (201), a support portion (202), and a connecting portion (203). The retaining ring (201) is arranged in opposite directions to the support portion (202), and the connecting portion (203) is perpendicular to the support portion (202). The retaining ring (201) has a second screw hole that mates with the first screw hole. The retaining ring (201) is embedded in the second retaining groove (104) and fixed to the fixing ring (103) by screws. The connecting portion (203) has a third screw hole. The end face of the protective cover (3) has a fourth screw hole. The end of the protective cover (3) is placed on the support portion (202), and the end face of the protective cover (3) is fixed to the connecting portion (203) by screws. The inner diameter of the protective cover (3) is larger than the inner diameter of the retaining ring (201).

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