Universal joint for roller shutter door

Abstract

The universal joint comprises a driving shaft, a transmission shaft and a rack, the transmission shaft is rotationally connected to one side of the driving shaft, the driving shaft is rotationally connected with the transmission shaft through a cross shaft clamping seat, the outer wall of the driving shaft is fixedly connected with a device box, the side wall of the driving shaft is fixedly connected with a spray head, and the spray head is fixedly connected with the rack. A connecting rod is fixedly connected to the outer wall of the lead screw sleeve, the end of the connecting rod is fixedly connected with the piston, and a driving mechanism for driving the piston and the lead screw sleeve to slide is installed in the device box. According to the self-lubricating universal joint, the function of self-lubricating driven by the reciprocating lead screw is introduced into the device, the driving shaft can drive the piston to slide during operation, lubricating liquid is accurately sprayed to rotating parts of the cross shaft clamping seat, friction and abrasion between the rotating parts are effectively reduced, stability of the universal joint during high-load and long-term operation is ensured, and meanwhile the service life of the universal joint is prolonged. Due to the automatic design of lubrication, the maintenance frequency is reduced, and the service life of the system is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to a universal joint technical field especially relates to a universal joint for rolling slats door. BACKGROUND

[0002] The universal joint is a universal joint, is the machine part that realizes variable angle power transmission, is used to the position that needs to change the direction of transmission axis, and the universal joint and transmission shaft combination are called universal joint transmission device, and the structure and function of universal joint are a little like the joint on human body four limbs, it allows the included angle between the connected parts to change in a certain range, satisfies power transmission.

[0003] At present, the universal joint for rolling slats door mostly adopts the cross axle universal joint, and the structure is relatively simple and the cost is lower, is suitable for the universal application in the rolling slats door system, but in the specific practical application process, because the cross axle universal joint bears the alternating load in the running process, especially under the condition of larger angle or heavier load, the friction between rotating parts can lead to faster wear and fatigue, and then affect the transmission performance, so a universal joint for rolling slats door is needed to be proposed aiming at the above problems. UTILITY MODEL CONTENT

[0004] The utility model aims at solving the shortcomings in the prior art and provides a universal joint for rolling slats door.

[0005] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A universal joint for rolling slats door, including driving axle and transmission shaft, gear rack, transmission shaft rotation is connected in driving axle side, driving axle is connected with transmission shaft rotation through cross axle card seat, driving axle outer wall fixed connection device box, the side wall fixed connection of driving axle is equipped with the spray head, the device box is connected with the spray head through the connecting pipe, the piston and the lead screw sleeve of device box sliding connection, the outer wall fixed connection of lead screw sleeve is equipped with connecting rod, the end and piston fixed connection of connecting rod, the device box is installed drive piston and the driving mechanism of lead screw sleeve sliding.

[0007] Preferably, the driving mechanism includes a reciprocating screw rotatingly connected to the bottom of the device box, and the lead screw sleeve is threadedly connected to a threaded segment of the reciprocating screw.

[0008] Preferably, the outer walls on both sides of the lead screw sleeve are in contact with the inner walls of the device box, and the end of the reciprocating screw is fixedly connected with a limiting block.

[0009] Preferably, the outer wall of the device box is rotatably connected with a gear, and the gear is fixedly connected with the reciprocating screw coaxially.

[0010] Preferably, the driving axle is externally provided with a gear rack, and the gear rack is intermeshed with the gear.

[0011] Preferably, the device box outer wall is provided with a sealing plug, and the limiting block has a radius larger than that of the reciprocating lead screw.

[0012] The utility model has the advantages of the following beneficial effects:

[0013] 1. The utility model discloses a device which introduces the automatic lubrication function of reciprocating lead screw driving, and the driving shaft can drive the piston to slide when running, so that the lubricating liquid can be accurately sprayed to the rotating parts of the card seat of the cross shaft, the friction and wear between the rotating parts are effectively reduced, the stability of the universal joint under high load and long-term operation is ensured, and the automatic lubrication design reduces the maintenance frequency and prolongs the service life of the system.

[0014] 2. The utility model discloses a rack and pinion, and the accurate design of the length of the rack controls the spraying amount of each lubrication, effectively prevents the problems of excessive or insufficient lubrication, avoids the waste of resources, and utilizes the reciprocating lead screw, when the lubricating liquid in the device box is exhausted, the piston only slides empty, and the driving shaft does not seize. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The utility model provides a structure schematic diagram of a universal joint for a roller shutter door.

[0016] Figure 2 The utility model discloses a structure schematic diagram of a universal joint for a roller shutter door. Figure 1 Structure schematic diagram.

[0017] Figure 3 The utility model discloses a structure schematic diagram of a universal joint for a roller shutter door. Figure 1 The utility model discloses a structure schematic diagram of a universal joint for a roller shutter door.

[0018] Fig. 1 is a main shaft; 2 is a transmission shaft; 3 is a device box; 4 is a rack; 5 is a cross shaft card seat; 6 is a nozzle; 7 is a connecting pipe; 8 is a sealing plug; 9 is a gear; 10 is a reciprocating lead screw; 11 is a limiting block; 12 is a piston; 13 is a lead screw sleeve; 14 is a connecting rod. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0020] Reference Figures 1-3The utility model relates to a universal joint for roller shutter door, including drive shaft 1 with transmission shaft 2, rack 4, transmission shaft 2 is rotatably connected in drive shaft 1 one side, drive shaft 1 is rotatably connected with transmission shaft 2 through cross axle card seat 5, drive shaft 1 outer wall fixedly connected device box 3, drive shaft 1 side wall fixedly connected with shower nozzle 6, device box 3 is connected with shower nozzle 6 through connecting pipe 7, device box 3 is slidably connected with piston 12 and lead screw sleeve 13 in, lead screw sleeve 13 outer wall fixedly connected with connecting rod 14, connecting rod 14 end and piston 12 fixedly connected, device box 3 is installed drive mechanism that drive piston 12 and lead screw sleeve 13 slide, be injected with lubricating liquid in the device box 3 of setting, and drive piston 12 slide by lead screw sleeve 13, can deliver the lubricating liquid in the device box 3 to the place of shower nozzle 6 through connecting pipe 7, lubrication is carried out by the spray of shower nozzle 6 to cross axle card seat 5.

[0021] Drive mechanism includes reciprocating screw 10 that is rotatably connected in the bottom of device box 3, lead screw sleeve 13 is threadedly connected on the threaded section of reciprocating screw 10, the outer wall of both sides of lead screw sleeve 13 is in contact with the inner wall of device box 3, and the end of reciprocating screw 10 is fixedly connected with limit block 11;It needs to be explained that considering the need to inject lubricating liquid into device box 3 periodically, if a threaded rod is used to drive piston 12 to slide, the rotation of drive shaft 1 is easily locked when the threaded rod reverses, and reciprocating screw 10 is used to prevent the locking of drive shaft 1.

[0022] Gear 9 is rotatably connected to the outer wall of device box 3, gear 9 is coaxially fixedly connected with reciprocating screw 10, rack 4 is installed outside drive shaft 1, rack 4 is meshed with gear 9, sealing plug 8 is installed on the outer wall of device box 3, and the radius size of limit block 11 is greater than the radius size of reciprocating screw 10;The rack 4 is installed in the inner wall of the transmission box of the roller shutter door when used, and the reciprocating screw 10 is driven to rotate synchronously when the drive shaft 1 drives the gear 9 to rotate, and the length of the rack 4 can be controlled to avoid excessive lubrication of the cross axle card seat 5 and waste of resources.

[0023] In the utility model, the device is used as follows: the drive shaft 1 is connected with the drive of the roller shutter door system, when the roller shutter door system is started, the drive device such as a motor drives the drive shaft 1 to rotate, the drive shaft 1 drives the transmission shaft 2 to rotate synchronously through the cross axle card seat 5, so that the opening and closing movement of the roller shutter door is completed.

[0024] When the driving shaft 1 rotates, the gear 9 also moves, the linear motion of the gear 9 matches the meshing of the rack 4, which synchronously drives the gear 9 to rotate, the reciprocating lead screw 10 rotates synchronously, the rotation of the reciprocating lead screw 10 drives the linear motion of the lead screw sleeve 13, and then drives the piston 12 to slide in the device box 3, the sliding of the piston 12 applies pressure to the lubricating liquid in the device box 3, the lubricating liquid is transported to the spray head 6 through the connecting pipe 7, and the lubricating liquid is sprayed to the cross shaft card seat 5 through the spray head 6, the rotating parts at the cross shaft card seat 5 are lubricated, friction and wear are reduced, and the stability and service life of the system in high load or long-term operation are ensured.

[0025] And through the length design of the rack 4, the spraying amount of lubricating liquid can be accurately controlled each time, the reciprocating motion structure of the reciprocating lead screw 10 can not only avoid the seizure of the driving shaft 1, but also can ensure that the lubricating liquid is stably transported to the spray head 6, and prevent the system from being stuck or damaged during key operation.

[0026] The outer wall of the device box 3 is provided with the sealing plug 8, and the user only needs to open the sealing plug 8 to inject new lubricating liquid regularly, so that the device always has enough lubricating liquid to maintain normal operation in long-term operation, and the service life of the universal joint and the roller shutter door is prolonged.

[0027] The above is only a preferred specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any person skilled in the art in the technical range disclosed by the utility model, according to the technical scheme and the utility model concept of the utility model, equivalent replacement or change, should be covered in the protection scope of the utility model.

Claims

1. A universal joint for a roller shutter door comprising a driving shaft (1) and a driven shaft (2), a rack (4), characterized in that, The transmission shaft (2) is rotatably connected on one side of the driving shaft (1), the driving shaft (1) is rotatably connected with the transmission shaft (2) through the cross shaft clamp seat (5), the outer wall of the driving shaft (1) is fixedly connected with the device box (3), the side wall of the driving shaft (1) is fixedly connected with the spray head (6), the device box (3) is connected with the spray head (6) through the connecting pipe (7), the piston (12) and the lead screw sleeve (13) are slidably connected in the device box (3), the outer wall of the lead screw sleeve (13) is fixedly connected with the connecting rod (14), the end of the connecting rod (14) is fixedly connected with the piston (12), and the driving mechanism for driving the piston (12) and the lead screw sleeve (13) to slide is installed in the device box (3).

2. A universal joint for a roller shutter door according to claim 1, characterised in that, The driving mechanism comprises a reciprocating lead screw (10) rotatably connected to the bottom of the device box (3), and the lead screw sleeve (13) is threadedly connected to the threaded section of the reciprocating lead screw (10).

3. A universal joint for a roller shutter door according to claim 2, characterised in that, The outer walls on both sides of the lead screw sleeve (13) are in contact with the inner walls of the device box (3), and the end of the reciprocating lead screw (10) is fixedly connected with the limiting block (11).

4. A universal joint for a roller shutter door according to claim 3, wherein, The outer wall of the device box (3) is rotatably connected with the gear (9), and the gear (9) is coaxially fixedly connected with the reciprocating lead screw (10).

5. A universal joint for a roller shutter door according to claim 4, wherein, The driving shaft (1) is externally provided with a rack (4), and the rack (4) is meshed with the gear (9).

6. A universal joint for a roller shutter door according to claim 5, wherein, The outer wall of the device box (3) is provided with a sealing plug (8), and the radius size of the limiting block (11) is greater than the radius size of the reciprocating lead screw (10).

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