Ball tooth universal joint for sewage conveying screw pump

Abstract

The utility model provides a ball tooth universal joint for a sewage conveying screw pump, and relates to the technical field of universal joints, the ball tooth universal joint comprises an inner ball tooth sleeve and an outer ball tooth universal shaft, the inner ball tooth sleeve is in ball tooth transmission connection with the outer ball tooth universal shaft; the connecting rod is connected with the outer spherical tooth universal shaft, and the inner spherical tooth sleeve and the outer spherical tooth universal shaft are combined and distributed at the two ends of the connecting rod. An elastic sealing sleeve is buckled to the outer portion of the inner spherical tooth sleeve, protruding ends are arranged at the two ends of the elastic sealing sleeve, annular grooves corresponding to the protruding ends are formed in the outer surface of the inner spherical tooth sleeve and the outer surface of the connecting rod, and the protruding ends are connected with the annular grooves in a matched mode. The inner spherical gear sleeve and the connecting rod are connected through the elastic sealing sleeve, it is guaranteed that the joint between the inner spherical gear sleeve and the connecting rod is sealed well, and sewage or other impurities are prevented from entering the spherical gear transmission part to affect the transmission effect and the service life.

Description

Technical Field

[0001] The utility model relates to the technical field of universal joints, in particular to a ball gear universal joint for a sewage conveying screw pump. Background Art

[0002] A screw pump for sewage transportation is a pump used to transport sewage or liquids containing solid particles. It consists of a screw and an external casing. The screw pump is usually driven by an electric motor, and the transmission between the motor and the screw pump usually requires a universal joint to connect. The universal joint allows the transmission shaft between the motor and the screw pump to rotate at different angles. When the screw rotates, the liquid moves along the spiral line of the screw and is pushed to the outlet of the pump.

[0003] In the sewage conveying screw pump, there may be large sewage pressure and corrosiveness. The moving parts of the existing ball gear universal joint have poor sealing performance and are easily eroded and corroded by sewage, which in turn leads to damage and leakage of the pump. Utility Model Content

[0004] Purpose of the utility model: In view of the above shortcomings, the utility model provides a ball gear universal joint for a sewage conveying screw pump to solve the above problems existing in the prior art.

[0005] Technical solution: A ball gear universal joint for a sewage conveying screw pump, comprising: an inner ball gear sleeve, an outer ball gear universal shaft, a connecting rod and an elastic sealing sleeve.

[0006] Inner ball gear sleeve,

[0007] An outer ball gear universal shaft, the inner ball gear sleeve is connected to the outer ball gear universal shaft through ball gear transmission;

[0008] A connecting rod connected to the outer ball gear universal shaft, wherein the inner ball gear sleeve and the outer ball gear universal shaft are combined and distributed at both ends of the connecting rod;

[0009] The elastic sealing sleeve is buckled on the outside of the inner ball gear sleeve. Both ends of the elastic sealing sleeve are provided with protruding ends. The inner ball gear sleeve and the outer surface of the connecting rod are both provided with annular grooves corresponding to the protruding ends. The protruding ends are matched and connected with the annular grooves.

[0010] In a further embodiment, the elastic sealing sleeve is provided with a corrugated telescopic end, and the telescopic end extends from the inner ball gear sleeve toward the connecting rod to form a cone shape.

[0011] In a further embodiment, the connecting rod is hollow inside and has internal threads at both ends, and the end of the external ball gear universal shaft is provided with external threads that match the internal threads.

[0012] In a further embodiment, the end of the external ball gear universal shaft is provided with a smooth end, and after the external ball gear universal shaft is connected to the connecting rod, the end of the elastic sealing sleeve fits the connecting rod and the smooth end.

[0013] In a further embodiment, the protruding end is an annular protrusion, and both the annular groove and the annular protrusion are provided with a corrugated surface.

[0014] Beneficial effects: The utility model provides a ball gear universal joint for a sewage conveying screw pump, which connects the inner ball gear sleeve and the connecting rod through an elastic sealing sleeve, and seals the ball gear transmission part of the inner ball gear sleeve and the outer ball gear universal shaft, thereby preventing sewage from affecting the ball gear transmission. The two ends of the elastic sealing sleeve are in contact with the inner ball gear sleeve and the outer surface of the connecting rod in the form of a corrugated surface, respectively, to increase the contact area, and the elastic sealing sleeve adaptively shrinks and fits tightly with the inner ball gear sleeve and the connecting rod to ensure the sealing effect. The connecting rod is threadedly connected to the outer ball gear universal shaft at both ends to facilitate disassembly, maintenance and replacement. The elastic sealing sleeve fits the connection position between the connecting rod and the outer ball gear universal shaft to increase the sealing surface to ensure the sealing effect between the connecting rod and the elastic sealing sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an overall half-section view of the utility model.

[0016] Figure 2 It is a partial half-section view of the utility model.

[0017] Figure 3 for Figure 2 A partial enlarged view of point A in the middle.

[0018] Figure 4 for Figure 2 A partial enlarged view of point B in the middle.

[0019] The reference numerals in the figure are: inner ball gear sleeve 1, annular groove 101, outer ball gear universal shaft 2, elastic sealing sleeve 3, raised end 301, raised end 302, telescopic end 303, connecting rod 4, annular groove 401, smooth end 201, corrugated surface 3011. DETAILED DESCRIPTION

[0020] In the following description, a large number of specific details are given to provide a more thorough understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the utility model, some technical features known in the art are not described.

[0021] The utility model provides a ball gear universal joint for a sewage conveying screw pump, comprising: an inner ball gear sleeve 1 with inner ball gears inside, an outer ball gear universal shaft 2 with outer ball gears outside, a connecting rod 4 and an elastic sealing sleeve 3 connected to the outer ball gear universal shaft 2, wherein the inner ball gear sleeve 1 is connected to the outer ball gear universal shaft 2 by ball gear transmission; the connecting rod 4 is detachably connected to the outer ball gear universal shaft 2, and the inner ball gear sleeve 1 and the outer ball gear universal shaft 2 are combined and distributed at both ends of the connecting rod 4; one end of the elastic sealing sleeve 3 is buckled on the outside of the inner ball gear sleeve 1. Both ends of the elastic sealing sleeve 3 are provided with a raised end 301 and a raised end 302, and the annular grooves 101 and 401 opened on the outer surfaces of the inner ball gear sleeve 1 and the connecting rod 4 correspond to and are matched with the raised end 301 and the raised end 302 respectively. The elastic sealing sleeve 3 is made of rubber, and the two ends of the elastic sealing sleeve 3 are respectively connected to the outside of the inner ball gear sleeve 1 and the connecting rod 4, and are connected in an interference fit manner to ensure a tight connection and achieve sealing at the ball gear meshing part. When the screw pump is working, the elastic sealing sleeve 3 prevents sewage from entering the connection part to ensure the normal operation and service life of the pump.

[0022] The elastic sealing sleeve 3 is provided with a corrugated telescopic end 303, and the telescopic end 303 extends from the inner ball gear sleeve 1 to the connecting rod 4 to form a cone shape. The elastic sealing sleeve 3 extends in a cone shape to adapt to the size difference between the connecting rod 4 and the inner ball gear sleeve 1. During the rotation of the universal joint, due to axial and angular deviations, a certain displacement and deformation will occur. The corrugated telescopic end 303 is used to compensate for the displacement and deformation to ensure the normal operation of the transmission system.

[0023] The connecting rod 4 is hollow inside, with internal threads at both ends, and the end of the external ball gear universal shaft 2 is provided with external threads matching the internal threads. The two ends of the connecting rod 4 are threadedly connected with the external ball gear universal shaft 2, so as to facilitate the subsequent disassembly and replacement of the external ball gear universal shaft 2.

[0024] The end of the outer ball gear universal shaft 2 is provided with a smooth end 201. After the outer ball gear universal shaft 2 is connected to the connecting rod 4, the end of the elastic sealing sleeve 3 fits the connecting rod 4 and the smooth end 201. After the outer ball gear universal shaft 2 is threadedly connected to the connecting rod 4, the smooth end 201 is located at the end of the connecting rod 4, one end of the elastic sealing sleeve 3 elastically shrinks and fits tightly to the outer surface of the connecting rod 4, and the elastic sealing sleeve 3 partially fits the smooth end 201 of the outer ball gear universal shaft 2, thereby improving the tightness of the connection between the connecting rod 4 and the outer ball gear universal shaft 2. At the same time, because the elastic sealing sleeve 3 is locked and fits the connecting rod 4 and the smooth end 201 of the outer ball gear universal shaft 2, the sealing surface is increased, thereby preventing sewage from entering the ball gear meshing part when the universal joint is working.

[0025] The raised end 301 is an annular raised portion, and the annular groove 101 and the annular raised portion are both provided with a corrugated surface 3011. The annular groove 101 on the inner ball gear sleeve 1 is connected to the raised end 301 of the elastic sealing sleeve 3, and the annular groove 401 on the connecting rod 4 is connected to the raised end 302 of the elastic sealing sleeve 3. The corrugated surface 3011 increases the contact area between the elastic sealing sleeve 3 and the inner ball gear sleeve 1, thereby improving the tightness of the connection. At the same time, the elastic sealing sleeve 3 has a certain deformation ability, and when the outer ball gear universal shaft 2 and the connecting rod 4 are rotating, the corrugated surface 3011 can enable the elastic sealing sleeve 3 to adapt to slight deviations and deformations during the rotation process, thereby maintaining a good sealing effect.

[0026] During installation, the raised end 301 of the elastic sealing sleeve 3 is connected to the annular groove 101 on the connecting rod 4, and the outer ball gear universal shaft 2 is connected to the inner ball gear sleeve 1 with ball gears to form a whole, and the outer ball gear universal shaft 2 or the connecting rod 4 is rotated to connect with each other. During the rotational connection between the inner ball gear sleeve 1 and the connecting rod 4, the other raised end 301 of the elastic sealing sleeve 3 gradually connects to the annular groove 101 on the inner ball gear sleeve 1 to complete the connection. The initial radial size of the raised end 301 of the elastic sealing sleeve 3 is smaller than the outer ball gear universal shaft 2 and the connecting rod 4, so that when connected, the elastic sealing sleeve 3 fits tightly with the outer ball gear universal shaft 2 and the connecting rod 4.

[0027] As described above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be interpreted as limiting the present invention itself. Various changes can be made to it in form and detail without departing from the spirit and scope of the present invention defined in the appended claims.

Claims

1. A ball gear universal joint for a sewage conveying screw pump, characterized in that: include: Inner ball gear sleeve; An outer ball gear universal shaft, the inner ball gear sleeve is connected to the outer ball gear universal shaft through ball gear transmission; A connecting rod connected to the outer ball gear universal shaft, wherein the inner ball gear sleeve and the outer ball gear universal shaft are combined and distributed at both ends of the connecting rod; The elastic sealing sleeve is buckled on the outside of the inner ball gear sleeve. Both ends of the elastic sealing sleeve are provided with protruding ends. The inner ball gear sleeve and the outer surface of the connecting rod are both provided with annular grooves corresponding to the protruding ends. The protruding ends are matched and connected with the annular grooves.

2. The ball gear universal joint for a sewage conveying screw pump according to claim 1, characterized in that: The elastic sealing sleeve is provided with a corrugated telescopic end, and the telescopic end extends from the inner ball gear sleeve toward the connecting rod to form a cone shape.

3. The ball gear universal joint for a sewage conveying screw pump according to claim 2, characterized in that: The connecting rod is hollow inside and has internal threads at both ends. The end of the external ball gear universal shaft is provided with external threads matching the internal threads.

4. The ball gear universal joint for a sewage conveying screw pump according to claim 3, characterized in that: The end of the external ball gear universal shaft is provided with a smooth end. After the external ball gear universal shaft is connected to the connecting rod, the end of the elastic sealing sleeve fits the connecting rod and the smooth end.

5. A ball gear universal joint for a sewage conveying screw pump according to any one of claims 1 to 4, characterized in that: The protruding end is an annular protrusion, and both the annular groove and the annular protrusion are provided with corrugated surfaces that match each other.

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