High-precision transmission shaft of high-frequency welded pipe unit

Abstract

The utility model discloses a high-precision transmission shaft of a high-frequency welded pipe unit, which belongs to the technical field of transmission shafts and comprises a shaft sleeve, a spline shaft inserted in the shaft sleeve, a spline groove formed in the shaft sleeve and matched with the spline shaft, and a shaft rod fixed at the end part of the spline shaft, cruciform universal joints are installed in the first movable connecting pieces, and second movable connecting pieces are installed at the ends of the cruciform universal joints. The fins are uniformly arranged at one end, close to the first movable connecting piece, of the shaft sleeve and one end, close to the first movable connecting piece, of the shaft rod in the circumferential direction, so that the fins can rotate along with the transmission shaft in the rotating process of the transmission shaft, wind flowing towards the cross universal joint is generated, the flowing speed of air at the cross universal joint is increased, the cooling effect on the cross universal joint is accelerated, and the service life of the cross universal joint is prolonged. Abrasion to the cross universal joint is reduced, the service life of the device is prolonged, and the transmission precision of the device is improved.

Description

Technical Field

[0001] The utility model relates to a high-precision transmission shaft, in particular to a high-frequency welded pipe unit high-precision transmission shaft, belonging to the technical field of transmission shafts. Background Art

[0002] In the prior art, for example, the utility model with application number 202121735603.8 discloses a high-precision transmission shaft assembly. In order to solve the problem that the connection is easily loose during transmission connection, which has certain adverse effects and brings certain impacts to people's use process, and the existing transmission shaft has a simple structure and poor heat dissipation effect, thereby affecting the service life and working time of the transmission shaft. A protective cover cylinder is provided on the outside of the transmission main shaft rod to provide external protection to prevent the transmission main shaft rod from being directly corroded by rainwater, a cooling pipe is provided, and coolant is injected into the cooling pipe through the liquid filling port, so that the heat generated by the operation of the transmission main shaft rod can be absorbed to achieve the cooling effect of the transmission main shaft rod, and heat dissipation holes are provided on the protective cover cylinder to facilitate the heat dissipation of the transmission main shaft rod, thereby improving the heat dissipation of the transmission main shaft rod and extending the service life and working time of the device.

[0003] Similar to the above application, there are still some shortcomings:

[0004] During the transmission process, the cross universal joint connection will also generate heat due to the high-speed rotation. The cooling method using coolant can only dissipate heat to the main shaft rod, and the cooling effect on the cross universal joint is poor. In addition, the connection between the spline groove and the sleeve cannot be sealed. Due to the influence of the use environment, dust particles can easily enter the interior of the sleeve, aggravating the wear inside the sleeve and affecting the transmission accuracy.

[0005] Therefore, a high-precision transmission shaft of a high-frequency pipe welding unit is designed to optimize the above problems. Utility Model Content

[0006] The main purpose of the utility model is to provide a high-precision transmission shaft of a high-frequency welding pipe unit, by evenly arranging fins along the circumferential direction on the shaft sleeve and the end of the shaft rod close to the first movable connecting piece, so that during the rotation of the transmission shaft, the fins will also rotate, generating wind flowing toward the cross universal joint, increasing the air flow rate at the cross universal joint, accelerating the cooling effect of the cross universal joint, reducing the wear of the cross universal joint, and improving the service life and transmission accuracy of the device, by providing a flaring groove at the end of the shaft sleeve, and installing a rubber ring at the internal limit of the flaring groove, the inner side of the rubber ring is provided with a groove matching the spline shaft, so that the rubber ring can fit tightly with the outer side of the spline shaft, effectively isolating dust from entering the interior of the shaft sleeve, avoiding dust-induced wear inside the shaft sleeve, and ensuring the accuracy of the transmission shaft during use.

[0007] The purpose of the utility model can be achieved by adopting the following technical solutions:

[0008] A high-precision transmission shaft of a high-frequency welded pipe unit comprises a shaft sleeve, a spline shaft inserted into the shaft sleeve, a spline groove provided in the shaft sleeve and matched with the spline shaft, and a shaft rod fixed to the end of the spline shaft, a first movable connecting piece is installed at one end of the shaft sleeve and the shaft rod away from the spline shaft, a cross universal joint is installed inside the first movable connecting piece, a second movable connecting piece is installed at the end of the cross universal joint, fins are evenly arranged along the circumferential direction on the outer side of one end of the shaft sleeve and the shaft rod away from the spline shaft, and a sealing mechanism is provided at one end of the shaft sleeve close to the shaft rod.

[0009] Preferably, flanges are installed at the ends of the second movable connecting members, and mounting holes are provided on the flanges.

[0010] Preferably, the fins are all arc-shaped and are arranged in a circular array.

[0011] Preferably: the sealing mechanism includes a flaring groove, a limiting groove, a rubber ring and a notch, the flaring groove is opened at the inner end of the sleeve, the limiting groove is opened on the inner side of the flaring groove, a rubber ring is installed inside the limiting groove, notches are evenly opened on the inner side of the rubber ring, and the outer spline of the spline shaft passes through the inside of the notch.

[0012] Preferably, an end of the flared groove close to the spline groove is provided with a chamfered surface, and an outer side surface of the chamfered surface is coated with a wear-resistant coating.

[0013] Preferably, one end of the spline shaft away from the shaft rod is semi-spherical, and the diameter of the semi-spherical shape is the same as the inner diameter of the rubber ring.

[0014] The beneficial effects of the utility model are:

[0015] The utility model provides a high-precision transmission shaft of a high-frequency welding pipe unit. Fins are evenly arranged along the circumferential direction on the shaft sleeve and the end of the shaft rod close to the first movable connecting piece, so that when the transmission shaft rotates, the fins will also rotate, generating wind flowing toward the cross universal joint, increasing the air flow rate at the cross universal joint, accelerating the cooling effect of the cross universal joint, reducing the wear of the cross universal joint, and improving the service life and transmission accuracy of the device;

[0016] By providing a flaring groove at the end of the sleeve and installing a rubber ring at the inner limit of the flaring groove, a groove matching the spline shaft is opened on the inner side of the rubber ring, so that the rubber ring can fit tightly with the outer side of the spline shaft, effectively isolating dust from entering the interior of the sleeve, avoiding dust-induced wear inside the sleeve, and ensuring the accuracy of the transmission shaft during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1It is the front view of the utility model;

[0018] Figure 2 It is a partial split structure diagram of the utility model;

[0019] Figure 3 This is a cross-sectional view of the end of the shaft sleeve of the utility model;

[0020] Figure 4 For the utility model Figure 3 Enlarged view of point A in the middle.

[0021] In the figure: 1. sleeve; 2. shaft; 3. spline shaft; 4. spline groove; 5. first movable connecting member; 6. second movable connecting member; 7. cross universal joint; 8. fin; 9. flared groove; 10. chamfered surface; 11. limit groove; 12. rubber ring; 13. notch. DETAILED DESCRIPTION

[0022] In order to make the technical solution of the utility model more clear and specific to those skilled in the art, the utility model is further described in detail below in conjunction with embodiments and drawings, but the implementation methods of the utility model are not limited thereto.

[0023] like Figure 1-Figure 4 As shown, this embodiment provides a high-precision transmission shaft of a high-frequency welded pipe unit, including a sleeve 1, a spline shaft 3 inserted in the sleeve 1, a spline groove 4 provided in the sleeve 1 and cooperating with the spline shaft 3, and a shaft rod 2 fixed to the end of the spline shaft 3, the sleeve 1 and the shaft rod 2 are both equipped with a first movable connecting piece 5 at one end away from the spline shaft 3, a cross universal joint 7 is installed inside the first movable connecting piece 5, and a second movable connecting piece 6 is installed at the end of the cross universal joint 7, the sleeve 1 and the shaft rod 2 are both equipped with fins 8 evenly arranged on the outer side of the end away from the spline shaft 3 along the circumferential direction, and a sealing mechanism is provided at the end of the sleeve 1 close to the shaft rod 2.

[0024] Overall working principle: When the device is installed, the two sets of second movable connecting parts on the transmission shaft are connected to the output shaft of the reducer and the driving shaft on the pressure wheel respectively. During use, the motor drives the reducer to rotate, and the reducer drives the pressure wheel to rotate through the transmission shaft to extrude the pipe. During the rotation of the transmission shaft, the fins 8 on the sleeve 1 and the shaft 2 will generate wind toward the direction of the cross joint 7, increase the flow rate of the air outside the cross joint 7, accelerate the cooling of the cross joint 7, ensure the normal use of the cross joint 7, and ensure the accuracy of the transmission. In addition, when the transmission shaft is in use, the sealing mechanism can be used to prevent dust from entering the interior of the sleeve 1.

[0025] In this embodiment, flanges are installed at the ends of the second movable connecting member 6, and mounting holes are provided on the flanges.

[0026] Local working principle: During the installation of the transmission shaft, bolts are passed through the mounting holes of the flange for bolt fixation.

[0027] In this embodiment, the fins 8 are all arc-shaped, and the fins 8 are arranged in a circular array.

[0028] Partial working principle: The arc-shaped fins 8 can guide the wind direction to ensure the heat dissipation effect.

[0029] In this embodiment, the sealing mechanism includes a flaring groove 9, a limiting groove 11, a rubber ring 12 and a notch 13. The flaring groove 9 is opened at the inner end of the sleeve 1, and a limiting groove 11 is opened on the inner side of the flaring groove 9. A rubber ring 12 is installed inside the limiting groove 11. Notches 13 are evenly opened on the inner side of the rubber ring 12, and the external spline of the spline shaft 3 passes through the inside of the notch 13.

[0030] Local working principle: During the installation of the spline shaft 3, it will first pass through the inside of the rubber ring 12 and then be inserted into the inside of the spline groove 4. The notch 13 on the inner side of the rubber ring 12 cooperates with the outer spline on the spline shaft 3 to ensure a tight fit with the outer side of the spline shaft 3, thereby ensuring a sealing effect during use.

[0031] In this embodiment, a chamfered surface 10 is provided at one end of the flared groove 9 close to the spline groove 4, and the outer side surface of the chamfered surface 10 is coated with a wear-resistant coating.

[0032] Partial working principle: The setting of the chamfered surface 10 can guide the spline shaft 3 when it is inserted, so as to facilitate assembly.

[0033] In this embodiment, the end of the spline shaft 3 away from the shaft rod 2 is semi-spherical, and the diameter of the semi-spherical shape is the same as the inner diameter of the rubber ring 12 .

[0034] Partial working principle: The semi-spherical setting of the end of the spline shaft 3 can facilitate alignment and insertion, making installation more convenient.

[0035] The above is only a further embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the scope disclosed by the present invention according to the technical solution and concept of the present invention, which fall within the protection scope of the present invention.

Claims

1. A high-precision transmission shaft for a high-frequency welded pipe unit, comprising a sleeve (1), a spline shaft (3) inserted into the sleeve (1), a spline groove (4) provided in the sleeve (1) and cooperating with the spline shaft (3), and a shaft (2) fixed to the end of the spline shaft (3), characterized in that: A first movable connecting member (5) is installed at one end of the shaft sleeve (1) and the shaft rod (2) away from the spline shaft (3), a cross universal joint (7) is installed inside the first movable connecting member (5), and a second movable connecting member (6) is installed at the end of the cross universal joint (7). Fins (8) are evenly arranged along the circumferential direction on the outer sides of the ends of the shaft sleeve (1) and the shaft rod (2) away from the spline shaft (3), and a sealing mechanism is arranged at one end of the shaft sleeve (1) close to the shaft rod (2).

2. A high-precision transmission shaft of a high-frequency welded pipe unit according to claim 1, characterized in that: The ends of the second movable connecting member (6) are all installed with flanges, and the flanges are all provided with mounting holes.

3. The high-precision transmission shaft of a high-frequency welded pipe unit according to claim 1, characterized in that: The fins (8) are all arc-shaped, and the fins (8) are arranged in a circular array.

4. The high-precision transmission shaft of a high-frequency welded pipe unit according to claim 1, characterized in that: The sealing mechanism comprises an expansion groove (9), a limiting groove (11), a rubber ring (12) and a notch (13); the expansion groove (9) is arranged at the inner end of the shaft sleeve (1); the limiting groove (11) is arranged inside the expansion groove (9); the rubber ring (12) is installed inside the limiting groove (11); the notches (13) are evenly arranged inside the rubber ring (12); and the outer spline of the spline shaft (3) passes through the inside of the notch (13).

5. A high-precision transmission shaft for a high-frequency pipe welding machine according to claim 4, characterized in that: An end of the flared groove (9) close to the spline groove (4) is provided with a chamfered surface (10), and the outer side surface of the chamfered surface (10) is coated with a wear-resistant coating.

6. The high-precision transmission shaft of a high-frequency welded pipe unit according to claim 1, characterized in that: One end of the spline shaft (3) away from the shaft (2) is in a semi-spherical shape, and the diameter of the semi-spherical shape is the same as the inner diameter of the rubber ring (12).

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