A single-screw pump universal joint structure convenient to disassemble

Abstract

The utility model discloses a single screw pump universal joint structure of convenient dismounting, including rotor, shaft coupling, connecting pin, the shaft coupling passes through connecting pin and transmits rotary torque to rotor, one end of rotor is equipped with the connector, the end side of connector is equipped with the position avoidance groove, one end of shaft coupling is equipped with the ball head, the ball head is located the position avoidance groove, the lateral wall of ball head and the position avoidance groove is equipped with the pin hole of cooperation connecting pin, the lateral wall of connector is equipped with the steel cover of sleeve, the steel cover is used for limiting the axial displacement of connecting pin, the lateral wall of connector is equipped with the clamping position step, the clamping position step abuts one end of steel cover, the other end of the lateral wall of connector is equipped with the ring groove close to steel cover, the ring groove is connected with the clamping spring of dismounting, the position of steel cover on the connector is limited by the cooperation of clamping spring and clamping position step, the utility model discloses simple structure, and the dismounting is convenient, can reduce maintenance cost.

Description

Technical Field

[0001] This utility model belongs to the field of screw pump accessory technology, specifically relating to a universal joint structure for a single screw pump that is easy to assemble and disassemble. Background Technology

[0002] The universal joint is one of the main components of a screw pump. Its working principle mainly utilizes the relative movement between two or more rotating shafts to achieve the pumping function. The universal joint of a screw pump can achieve large-angle output and transport the liquid from the pump inlet to the pump outlet.

[0003] Currently, the connection and transmission between the coupling rod and the rotor of a single screw pump are all achieved through a transmission pin. This allows the rotational torque of the motor to be transmitted to the rotor through the coupling rod and transmission pin, so that the conveying medium is transported out through the meshing rotation of the rotor and stator.

[0004] Traditionally, a protective sleeve needs to be fitted over the area where the coupling rod connects to the rotor, and cable ties are used to secure the sleeve at both ends. However, the existing protective sleeves are too large and inconvenient to install, and routine maintenance is quite troublesome. Special tools are also required to tighten and loosen the cable ties, which are disposable consumables. This not only makes them inconvenient to use but also increases maintenance costs.

[0005] Therefore, how to provide a single screw pump universal joint structure that does not require special tools and is easy to disassemble and assemble is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0006] In view of this, the present invention provides a single screw pump universal joint structure that is easy to disassemble and assemble, requires no special tools, the parts can be reused, facilitates maintenance, eliminates the need for consumable cable ties, and saves costs.

[0007] To achieve the above objectives, this utility model adopts the following technical solution: a universal joint structure for a single screw pump that is easy to disassemble and assemble, comprising a rotor, a coupling rod, and a connecting pin. The coupling rod transmits rotational torque to the rotor through the connecting pin. One end of the rotor is provided with a connector, and the end side of the connector is provided with a clearance groove. One end of the coupling rod is provided with a ball head, which is located in the clearance groove. The ball head and the side wall of the clearance groove are coaxially provided with pin holes for engaging the connecting pin. A steel sleeve is fitted on the outer side wall of the connector, which is used to limit the axial displacement of the connecting pin. A locking step is provided on the outer side wall of the connector, which abuts against one end of the steel sleeve. An annular groove is provided on the other end of the outer side wall of the connector near the steel sleeve. A retaining spring is detachably connected in the annular groove. The retaining spring and the locking step cooperate to limit the position of the steel sleeve on the connector.

[0008] The beneficial technical effects of this utility model are: the steel sleeve is positioned by a retaining spring. When disassembling, the retaining spring is removed, the steel sleeve is slid out, and the connecting pin is removed. Traditionally, special tools are required to remove the cable ties before the steel sleeve can be removed. Compared with the traditional method, this invention does not require special tools, making disassembly and replacement convenient and efficient. It also eliminates the need for cable ties, saving costs.

[0009] Preferably, it also includes a rubber protective sleeve, one end of which is detachably sealed to the opening of the relief groove, and the other end of which is detachably sealed to the outer wall of the coupling rod, and the relief groove is filled with lubricating oil.

[0010] The resulting technical effect is that a rubber protective sleeve is installed at the groove end to create a sealed environment for the lubricating oil, reducing wear at the joint and extending the service life as much as possible.

[0011] Preferably, it also includes an elastic hoop, and a groove is provided on the outer side wall of the rubber protective sleeve near the coupling rod. The elastic hoop is embedded in the groove and improves the tightness of contact between the rubber protective sleeve and the outer wall of the coupling rod.

[0012] The resulting technical effect is that, while conventional rubber protective sleeves are secured with cable ties, this device uses elastic clamps to secure the rubber protective sleeves, thus preventing oil leakage gaps between the rubber protective sleeves and the outer wall of the coupling rod.

[0013] Preferably, the outer wall of the coupling rod is provided with a positioning platform to limit the axial movement of the rubber protective sleeve.

[0014] The resulting technical effect is that the positioning platform can limit the axial movement of the rubber protective sleeve, ensuring its stable installation relationship.

[0015] Preferably, a limiting platform is provided at one end edge of the outer side wall of the rubber protective sleeve, and the limiting platform abuts against the outer edge of the groove opening of the relief groove.

[0016] The resulting technical effect is that the limiting platform abuts against the outer edge of the relief groove, providing a positioning base and increasing the sealing surface, thereby improving the sealing level.

[0017] Preferably, the outer wall of the connector is provided with a plurality of rubber ring grooves corresponding to the steel sleeve connection section. The plurality of rubber ring grooves are distributed on both sides of the pin hole. A sealing rubber ring is connected in the rubber ring groove and the sealing rubber ring abuts against the inner wall of the steel sleeve.

[0018] The resulting technical effect is that the sealing ring prevents lubricating oil from leaking from the gap between the steel sleeve and the outer wall of the connector.

[0019] Preferably, the two ends of the connecting pin are provided with arc surfaces, and the arc surfaces abut against the inner wall of the steel sleeve.

[0020] The resulting technical effect is that the curved surface can reduce friction and wear between the connecting pin and the steel sleeve during the assembly and disassembly process. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the mating structure of a universal joint structure for a single screw pump that is easy to assemble and disassemble according to this utility model;

[0022] Figure 2 This is a partial schematic diagram of the connector of a universal joint structure for a single screw pump that is easy to assemble and disassemble according to this utility model;

[0023] Figure 3 This is a schematic diagram of a rubber protective sleeve for a single screw pump universal joint structure that is easy to assemble and disassemble according to this utility model;

[0024] Figure 4 This is a schematic diagram of the universal joint structure of an existing single screw pump.

[0025] 1. Rotor, 2. Coupling rod, 21. Positioning platform, 22. Ball head, 3. Connecting pin, 4. Connecting head, 5. Alternating groove, 6. Steel sleeve, 7. Positioning step, 8. Ring groove, 9. Snap ring, 10. Rubber protective sleeve, 101. Snap groove, 102. Limiting platform, 11. Elastic hoop, 12. Sealing ring, 13. Cable tie. 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] See appendix to this utility model Figures 1 to 3 According to an embodiment of the present invention, a universal joint structure for a single screw pump that is easy to disassemble and assemble includes a rotor 1, a coupling rod 2, and a connecting pin 3. The coupling rod 2 transmits rotational torque to the rotor 1 through the connecting pin 3. One end of the rotor 1 is provided with a connector 4, and the end side of the connector 4 is provided with a relief groove 5. One end of the coupling rod 2 is provided with a ball head 22, which is located in the relief groove 5. The side walls of the ball head 22 and the relief groove 5 are coaxially provided with pin holes for engaging the connecting pin. A steel sleeve 6 is fitted on the outer side wall of the connector 4. The steel sleeve 6 is used to limit the axial displacement of the connecting pin 3. A locking step 7 is provided on the outer side wall of the connector 4, which abuts against one end of the steel sleeve 6. An annular groove 8 is provided on the other end of the outer side wall of the connector 4 near the steel sleeve 6. A retaining spring 9 is detachably connected in the annular groove 8. The retaining spring 9 and the locking step 7 cooperate to limit the position of the steel sleeve 6 on the connector 4.

[0028] To ensure the filling effect of the lubricating oil, a rubber protective sleeve 10 is set to seal the groove. One end of the rubber protective sleeve 10 is detachably sealed to the groove of the relief groove 5, and the other end of the rubber protective sleeve 10 is detachably sealed to the outer wall of the coupling rod 2. The relief groove 5 is filled with lubricating oil to extend the service life of the joint and reduce friction loss.

[0029] To improve disassembly and connection, an elastic hoop 11 is used to lock the rubber protective sleeve. A groove 101 is provided on the outer wall of the end of the rubber protective sleeve 10 near the coupling rod 2 to provide an installation position for the elastic rubber ring. The elastic hoop 11 is embedded in the groove 101 and improves the tightness between the rubber protective sleeve 10 and the outer wall of the coupling rod 2, thereby achieving the clamping of the rubber protective sleeve.

[0030] In other embodiments, the outer wall of the coupling rod 2 is provided with a positioning platform 21 that limits the axial movement of the rubber protective sleeve 10, thereby ensuring the installation stability of the rubber protective sleeve.

[0031] In some other embodiments, a limiting platform 102 is provided at one edge of the outer side wall of the rubber protective sleeve 10. The limiting platform 102 abuts against the outer edge of the groove of the clearance groove 5 to improve the installation and positioning efficiency of the rubber protective sleeve.

[0032] In some other specific embodiments, the outer wall of the connector 4 and the connecting section of the steel sleeve 6 are provided with a plurality of rubber ring grooves. The plurality of rubber ring grooves are distributed on both sides of the pin hole. A sealing rubber ring 12 is connected in the rubber ring groove. The sealing rubber ring 12 abuts against the inner wall of the steel sleeve 6. The sealing rubber ring can seal the gap and prevent oil leakage between the steel sleeve and the outer wall of the connector.

[0033] Specifically, the two ends of the connecting pin 3 are provided with arc surfaces, which abut against the inner wall of the steel sleeve 6 to reduce friction and wear during disassembly and assembly.

[0034] Compared to existing solutions, this device (see attached document) Figure 4 No special tools are needed to remove the cable ties, the parts can be reused multiple times, which is convenient for maintenance, saves costs, and makes it easy to inject lubricant.

[0035] The apparatus and methods disclosed in the embodiments are described simply because they correspond to the methods disclosed in the embodiments. For relevant details, please refer to the method section.

[0036] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A universal joint structure for a single screw pump that is easy to assemble and disassemble, comprising a rotor (1), a coupling rod (2), and a connecting pin (3), wherein the coupling rod (2) transmits rotational torque to the rotor (1) through the connecting pin (3), characterized in that, One end of the rotor (1) is provided with a connector (4), and the end side of the connector (4) is provided with a clearance groove (5). One end of the coupling rod (2) is provided with a ball head (22), and the ball head (22) is located in the clearance groove (5). The side wall of the ball head (22) and the clearance groove (5) are coaxially provided with a pin hole for a connecting pin. The outer side wall of the connector (4) is provided with a steel sleeve (6), which is used to limit the axial displacement of the connecting pin (3). The outer side wall of the connector (4) is provided with a locking step (7), which abuts against one end of the steel sleeve (6). The other end of the outer side wall of the connector (4) near the steel sleeve (6) is provided with an annular groove (8). A retaining ring (9) is detachably connected in the annular groove (8). The retaining ring (9) and the locking step (7) cooperate to limit the position of the steel sleeve (6) on the connector (4).

2. The universal joint structure for a single screw pump that is easy to assemble and disassemble according to claim 1, characterized in that, It also includes a rubber protective sleeve (10), one end of which is detachably sealed to the opening of the relief groove (5), and the other end of which is detachably sealed to the outer wall of the coupling rod (2), and the relief groove (5) is filled with lubricating oil.

3. The universal joint structure for a single screw pump that is easy to assemble and disassemble according to claim 2, characterized in that, It also includes an elastic hoop (11). The rubber protective sleeve (10) has a groove (101) on the outer side wall of one end near the coupling rod (2). The elastic hoop (11) is embedded in the groove (101) and improves the tightness of the rubber protective sleeve (10) and the outer wall of the coupling rod (2).

4. The universal joint structure for a single screw pump that is easy to assemble and disassemble according to claim 2, characterized in that, The outer wall of the coupling rod (2) is provided with a positioning platform (21) to limit the axial movement of the rubber protective sleeve (10).

5. The universal joint structure for a single screw pump that is easy to assemble and disassemble according to claim 2, characterized in that, The outer edge of the outer wall of the rubber protective sleeve (10) is provided with a limiting platform (102), which abuts against the outer edge of the groove of the avoidance groove (5).

6. The universal joint structure for a single screw pump that is easy to assemble and disassemble according to claim 1, characterized in that, The outer wall of the connector (4) is provided with a plurality of rubber ring grooves corresponding to the connecting section of the steel sleeve (6). The plurality of rubber ring grooves are distributed on both sides of the pin hole. A sealing rubber ring (12) is connected in the rubber ring groove and the sealing rubber ring (12) abuts against the inner wall of the steel sleeve (6).

7. The universal joint structure for a single screw pump that is easy to assemble and disassemble according to claim 1, characterized in that, The connecting pin (3) has arc surfaces at both ends, and the arc surfaces abut against the inner wall of the steel sleeve (6).

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