A flexible motor shaft connection structure for a grease pump

Abstract

This utility model discloses a flexible motor shaft connection structure for a grease pump, relating to the field of coupling technology. It includes a coupling with a through-hole for inserting a drive shaft and a driven shaft, respectively. A threaded hole is formed in the side wall of the coupling near the drive shaft, with a screw threaded into the hole. The screw abuts against the side wall of the drive shaft. A pin hole is formed in the side wall of the coupling near the driven shaft, with a pin inserted inside. The pin passes through both the driven shaft and the side wall of the coupling. The screw and pin axially fix the drive and driven shafts, ensuring a stable connection between the coupling and the drive and driven shafts. This prevents axial displacement of the shafts during operation, ensuring the stability of the connection structure when transmitting torque, guaranteeing stable shaft operation, improving the reliability of the motor shaft, reducing misalignment caused by abnormal connection between the shaft and the coupling, and reducing vibration and noise between the shaft and the coupling.

Description

Technical Field

[0001] This utility model relates to the field of coupling technology, and in particular to a flexible motor shaft connection structure for grease pumps. Background Technology

[0002] The motor shaft (drive shaft) and pump shaft (driven shaft) of a grease pump are connected by a coupling for normal operation. However, traditional flexible motor shaft connection structures have many shortcomings. With prolonged operation and complex and changing working conditions, such as frequent start-stop cycles and load variations, the axial fixation of the motor shaft and pump shaft within the coupling often becomes ineffective. Due to the lack of effective axial limiting measures, the two shafts are prone to axial misalignment, leading to instability in their relative positions. This results in abnormal power transmission, causing abnormal friction and collisions between the shafts and the coupling, generating significant vibration and noise, accelerating component wear, shortening the service life of the entire connection structure and related equipment, and affecting the normal operation of the grease pump. This makes it difficult to meet current requirements for stable, efficient, and low-noise operation of grease pumps. Utility Model Content

[0003] To improve the connection stability between the shaft and the coupling, this application provides a flexible motor shaft connection structure for a grease pump.

[0004] The flexible motor shaft connection structure for a grease pump provided in this application adopts the following technical solution: A flexible motor shaft connection structure for a grease pump includes: a coupling with a through-hole for inserting a drive shaft and a driven shaft respectively inserted at both ends of the through-hole; a threaded hole for threaded connection of a screw to the threaded hole on the sidewall near the drive shaft; a pin hole for a pin inserted into the pin hole and passing through the driven shaft and the sidewall of the coupling.

[0005] By adopting the above technical solution, and through-holes in the coupling, the driving shaft and driven shaft can be easily inserted and connected to achieve power transmission. A threaded hole is provided on the side wall of the coupling near the driving shaft for threaded screw connection, with the screw abutting against the side wall of the driving shaft. A pin hole with a pin is provided on the side near the driven shaft, with the pin penetrating both the driven shaft and the coupling side wall. This effectively fixes the driving and driven shafts axially, preventing axial displacement during operation, ensuring the stability of the connection structure when transmitting torque, ensuring stable shaft operation, and improving the reliability of the motor shaft. Simultaneously, it reduces misalignment caused by abnormal connection between the shaft and the coupling, and reduces vibration and noise generated between the shaft and the coupling.

[0006] Optionally, the drive shaft has an abutment plane on its circumferential side, and the screw abuts against the abutment plane.

[0007] By adopting the above technical solution, a contact surface is provided on the circumferential side of the drive shaft, allowing the screw to abut against it tightly and stably. Compared to contact with the circular shaft wall, the contact surface provides a more reliable point of force for the screw, further enhancing the axial fixing effect on the drive shaft. This prevents the drive shaft from shifting within the insertion hole under the various forces generated by the motor operation and grease pump operation, thereby maintaining the stability of the entire connection structure and ensuring the continuity and smoothness of power transmission.

[0008] Optionally, the coupling is provided with a claw-shaped clamping member at the insertion hole near one end of the drive shaft. The claw-shaped clamping member includes at least two clamping plates. The inner side of the clamping plate mates with the abutment plane. A fastening ring is threadedly connected to the outer circumference of the clamping plate. The fastening ring is rotatably connected to the coupling.

[0009] By adopting the above technical solution, a claw-type clamping component is set at the insertion hole near the drive shaft end of the coupling. At least two clamping plates of the component mate with the abutment plane of the drive shaft. A fastening ring threaded onto the clamping plates is then rotatably connected to the coupling. The fastening ring rotates and retracts the clamping plates, which radially grips and fixes the drive shaft. This, in conjunction with the axial fixing of the screws, further strengthens the connection between the drive shaft and the coupling. Moreover, the clamping plates can accommodate minor dimensional deviations or angular deviations that may exist in the drive shaft during installation, making installation more convenient. At the same time, it ensures the overall stability after connection and effectively reduces vibration and noise caused by loose connection.

[0010] Optionally, the coupling includes a driving coupling and a driven coupling. The driving coupling is sleeved on the driving shaft, and the driven coupling is sleeved on the driven shaft. An elastic connecting member is provided between the driving coupling and the driven coupling, and both the driving coupling and the driven coupling are connected in cooperation with the elastic connecting member.

[0011] By adopting the above technical solution, the coupling is divided into a driving coupling and a driven coupling, and an elastic connecting element is installed between them. This design allows the connection structure to effectively buffer and absorb vibrations and impacts from both ends of the driving and driven shafts while transmitting torque, thanks to the elastic deformation of the connecting element. Especially in equipment like grease pumps, which may vibrate due to factors such as media flow and load changes during operation, this structure can effectively isolate the transmission of vibration between shafts, reduce the vibration amplitude of the entire transmission system, minimize the impact on other components of the equipment, thereby improving the operational reliability of the grease pump and related transmission components, and reducing the wear and failure rate caused by vibration.

[0012] Optionally, the driving coupling is provided with a plurality of snap-fit ​​blocks I in a ring, and the driven coupling is provided with a plurality of snap-fit ​​blocks II in a ring, wherein the snap-fit ​​blocks I are located between two adjacent snap-fit ​​blocks II, and the snap-fit ​​blocks II are located between two adjacent snap-fit ​​blocks I.

[0013] By adopting the above technical solution, multiple snap-fit ​​blocks (I) are arranged in a ring on the driving coupling, and multiple snap-fit ​​blocks (II) are arranged in a ring on the driven coupling. Snap-fit ​​blocks (I) are located between two adjacent snap-fit ​​blocks (II), and snap-fit ​​blocks (II) are located between two adjacent snap-fit ​​blocks (I). This staggered layout provides the installation and positioning positions for the elastic connectors. This ensures that the elastic connectors can evenly distribute the force when connecting the driving and driven couplings, guaranteeing that the elastic connectors can effectively perform buffering and force transmission functions in different directions. It avoids excessive local force or uneven force transmission, thereby further optimizing the power transmission performance and vibration reduction effect of the entire connection structure, enabling the grease pump to operate smoothly under different working conditions.

[0014] Optionally, the elastic connector includes a plurality of ring-shaped snap-fit ​​blocks three, which are located between snap-fit ​​blocks one and snap-fit ​​blocks two.

[0015] By adopting the above technical solution, the third snap-fit ​​block is located between the first and second snap-fit ​​blocks. This structure creates a tight and orderly snap-fit ​​relationship between the elastic connector and the driving and driven couplings. Multiple third snap-fit ​​blocks can transmit torque and buffer vibrations between the first and second snap-fit ​​blocks, increasing the elasticity and flexibility of the connection structure. When faced with complex and variable load conditions and vibration impacts, it can adapt through its own deformation, ensuring smooth power transmission. It also enhances the fatigue resistance of the entire connection structure, extends its service life, and ensures the long-term stable operation of the grease pump.

[0016] Optionally, the driven coupling includes two semi-ring blocks, with the insertion hole formed between the two semi-ring blocks, and a sliding rod connected between the two semi-ring blocks. The sliding rod has limiting heads at both ends, and a sliding channel is provided inside the semi-ring blocks. The limiting heads are slidably connected in the sliding channel.

[0017] By adopting the above technical solution, the two semi-ring blocks are separated and combined by a sliding rod, so that the driven shaft can be conveniently set in the insertion hole. The limiting head of the sliding rod is set in the sliding channel, which plays a limiting role in the separation of the two semi-ring blocks. The two semi-ring blocks will not be completely separated, so that one of the semi-ring blocks will not be lost in actual use.

[0018] Optionally, the pin passes through both of the semi-ring blocks.

[0019] By adopting the above technical solution, the pin passes through the two semi-ring blocks, which can fix the two semi-ring blocks together radially. The semi-ring blocks will not easily separate or misalign, ensuring the reliability of the connection between the driven coupling and the driven shaft. This ensures that the torque can be stably transmitted from the driving shaft to the driven shaft through the connection structure, maintaining the normal power transmission of the grease pump. At the same time, it reduces the vibration and noise caused by the loosening between the two semi-ring blocks, and improves the working performance of the entire connection structure.

[0020] In summary, this application includes at least one of the following beneficial effects: 1. The driven coupling adopts a structure of two semi-ring blocks with sliding rod and limit head, which can be easily assembled with the driven shaft, and the semi-ring blocks will not completely separate, avoiding the loss of parts; the contact plane design of the drive shaft and the cooperation of the claw-type clamping parts and the fastening ring can adapt to small dimensional deviations, simplify the installation and debugging process, and improve assembly efficiency.

[0021] 2. By using screws to tighten the drive shaft, pins to fix the driven shaft, and claw-type clamps to radially clamp the shaft, combined with the staggered snap-fit ​​structure of the drive coupling and the driven coupling, the displacement and misalignment of the shaft are restricted from multiple dimensions, ensuring continuous and smooth power transmission and enhancing the reliability of the connection structure under various working conditions.

[0022] 3. The elastic connecting parts and locking blocks between the driving coupling and the driven coupling can effectively buffer vibration, absorb impact, and isolate vibration transmission between shafts. At the same time, it reduces abnormal friction and collision between the shaft and the coupling, significantly reduces noise caused by structural loosening or vibration, and optimizes the working environment. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of a flexible motor shaft connection structure for a grease pump according to an embodiment of this application.

[0024] Figure 2 This is an exploded view of a flexible motor shaft connection structure for a grease pump according to an embodiment of this application.

[0025] Figure 3 This is an exploded view of a flexible motor shaft connection structure for a grease pump according to an embodiment of this application.

[0026] Figure 4 This is an exploded view of the driven coupling in the embodiments of this application.

[0027] Explanation of reference numerals in the attached figures: 1. Coupling; 101. Insertion hole; 102. Screw hole; 103. Pin hole; 11. Claw clamping part; 111. Clamping plate; 112. Fastening ring; 12. Driving coupling; 121. Snap-fit ​​block one; 13. Driven coupling; 131. Snap-fit ​​block two; 132. Semi-ring block; 1301. Sliding channel; 133. Sliding rod; 1331. Limiting head; 2. Driving shaft; 201. Abutment plane; 3. Driven shaft; 4. Screw; 5. Pin; 6. Flexible connecting part; 61. Snap-fit ​​block three; Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0029] This application discloses a flexible motor shaft connection structure for a grease pump, referring to... Figure 1 and 2 The coupling includes a coupling 1 with insertion holes 101 at both ends. A drive shaft 2 and a driven shaft 3 are inserted into these insertion holes 101. A screw hole 102 is formed through the side wall of the coupling 1, and a screw 4 is installed within the screw hole 102, abutting against the side wall of the drive shaft 2. Specifically, the screw 4 is a flat-head hexagonal screw, with the head flat on the side closest to the drive shaft 2. A pin hole 103 is also formed through the side wall of the connecting shaft, and a pin 5 is inserted into the pin hole 103. The pin 5 passes through both the driven shaft 3 and the side wall of the coupling 1. Specifically, the pin 5 passes through both side walls of the coupling 1. The screw 4 applies radial pressure to the drive shaft 2, reducing axial displacement of the drive shaft 2 within the coupling 1. The pin 5 directly passes through the coupling 1 and the driven shaft 3 to fix the driven shaft 3, improving the connection stability between the shaft and the coupling 1.

[0030] In a preferred embodiment, refer to Figure 2 and 3 The drive shaft 2 has a contact surface 201 on its circumference, and the screw 4 abuts against the contact surface 201. In this embodiment, the drive shaft 2 has three contact surfaces 201 around its perimeter, and three screws 4 are correspondingly provided, each abutting against one of the three contact surfaces 201. The contact surface 201 abuts against the flat head of the screw 4, which allows the screw 4 to better apply radial pressure to the drive shaft 2, resulting in a better fixing effect of the screw 4 on the drive shaft 2 and reducing axial displacement.

[0031] In a preferred embodiment, refer to Figure 2 and 3The coupling 1 includes a driving coupling 12 and a driven coupling 13. The driving coupling 12 is used to connect to the driving shaft 2, and the driven coupling 13 is used to connect to the driven shaft 3. An elastic connecting member 6 is provided between the driving coupling 12 and the driven coupling 13, and both the driving coupling 12 and the driven coupling 13 are connected to the elastic connecting member 6. Specifically, the elastic connecting member 6 is made of polyurethane. The driving coupling 12 is provided with a plurality of snap-fit ​​blocks 121 in a ring, and the driven coupling 13 is provided with a plurality of snap-fit ​​blocks 131 in a ring. In this embodiment, there are four snap-fit ​​blocks 121 and four snap-fit ​​blocks 131. The snap-fit ​​blocks 121 and the snap-fit ​​blocks 131 are arranged alternately, with the snap-fit ​​blocks 121 located between two adjacent snap-fit ​​blocks 131, and the snap-fit ​​blocks 131 located between two adjacent snap-fit ​​blocks 131. The elastic connector 6 is annularly provided with multiple locking blocks 61. In this embodiment, there are eight locking blocks 61, which are located between locking blocks 121 and locking blocks 131. The locking blocks 61 provide radial torque transmission and buffering function for locking blocks 121 and 131, which can reduce the relative vibration between locking blocks 121 and 131, reduce component wear, and extend the service life of the component.

[0032] In a preferred embodiment, refer to Figure 2 and 3 The active coupling 12 has a claw-type clamping member 11 near the active shaft 2. The claw-type clamping member 11 includes clamping pieces 111. In this embodiment, there are three clamping pieces 111. The inner side of the clamping piece 111 mates with the abutment plane 201. A fastening ring 112 is rotatably connected to the coupling 1. The fastening ring 112 is threaded to the outer wall of the clamping piece 111. The diameter of the inner wall of the fastening ring 112 gradually decreases from the driven shaft 3 toward the active shaft 2. When the fastening ring 112 is rotated, the clamping piece 111 is pushed inward, thereby clamping the active shaft 2 from multiple directions.

[0033] In a preferred embodiment, refer to Figure 3 and 4The driven coupling 13 includes two semi-ring blocks 132, which are mirror-symmetrically arranged. A insertion hole 101 is formed between the two semi-ring blocks 132. The two semi-ring blocks 132 are connected by a sliding rod 133. Each end of the sliding rod 133 is provided with a limiting head 1331, the diameter of which is larger than that of the sliding rod 133. A sliding channel 1301 is provided within each semi-ring block 132, and the limiting head 1331 is located within the sliding channel 1301 and slides back and forth within it. Specifically, a pin 5 passes through the two semi-ring blocks 132 and the driven shaft 3. The two semi-ring blocks 132 can slide open and close relative to each other. When the two semi-ring blocks 132 are open, the insertion hole 101 is enlarged. After the driven shaft 3 is inserted into the insertion hole 101, the two semi-ring blocks 132 are closed, and the pin 5 then passes through the two semi-ring blocks 132 to fix the driven shaft 3. The limiting head 1331 is locked in the sliding channel 1301, and the two semi-ring blocks 132 will not be completely separated, so as to avoid losing one of the semi-ring blocks 132 during use, and no additional fixing is required between the two semi-ring blocks 132.

[0034] The above are all preferred embodiments of this application. These embodiments are merely explanations of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A flexible motor shaft connection structure for a grease pump, characterized by, include: A coupling (1) is provided with a through-hole (101), and the two ends of the through-hole (101) are respectively inserted into the drive shaft (2) and the driven shaft (3). A screw hole (102) is provided through the side wall of the coupling (1) near the drive shaft (2), and a screw (4) is threaded into the screw hole (102). The screw (4) abuts against the side wall of the drive shaft (2). A pin hole (103) is provided through the side wall of the coupling (1) near the driven shaft (3), and a pin (5) is provided in the pin hole (103). The pin (5) is provided through the driven shaft (3) and the side wall of the coupling (1).

2. A flexible motor shaft coupling structure for a grease pump according to claim 1, characterized in that: The drive shaft (2) has an abutment surface (201) on its periphery, and the screw (4) abuts against the abutment surface (201).

3. A flexible motor shaft coupling for a grease pump according to claim 2, wherein: The coupling (1) is provided with a claw-type clamping member (11) at the insertion hole near one end of the drive shaft (2). The claw-type clamping member (11) includes at least two clamping plates (111). The inner side of the clamping plate (111) cooperates with the abutment plane (201). The outer circumference of the clamping plate (111) is threaded with a fastening ring (112). The fastening ring (112) is rotatably connected to the coupling (1).

4. The flexible motor shaft coupling structure for a grease pump according to claim 1, characterized by: The coupling (1) includes a driving coupling (12) and a driven coupling (13). The driving coupling (12) is sleeved on the driving shaft (2), and the driven coupling (13) is sleeved on the driven shaft (3). An elastic connecting member (6) is provided between the driving coupling (12) and the driven coupling (13). Both the driving coupling (12) and the driven coupling (13) are connected to the elastic connecting member (6).

5. The flexible motor shaft connection structure for a grease pump according to claim 4, characterized in that: The driving coupling (12) is provided with a plurality of snap-fit ​​blocks (121) in a ring, and the driven coupling (13) is provided with a plurality of snap-fit ​​blocks (131) in a ring. The snap-fit ​​blocks (121) are located between two adjacent snap-fit ​​blocks (131), and the snap-fit ​​blocks (131) are located between two adjacent snap-fit ​​blocks (121).

6. A flexible motor shaft coupling for a grease pump according to claim 5, wherein: The elastic connector (6) includes a plurality of ring-shaped snap-fit ​​blocks three (61), which are located between snap-fit ​​blocks one (121) and snap-fit ​​blocks two (131).

7. A flexible motor shaft coupling for a grease pump as defined in claim 4, wherein: The driven coupling (13) includes two semi-ring blocks (132), and a sliding rod (133) is connected between the two semi-ring blocks (132). The sliding rod (133) has a limiting head (1331) at both ends. A sliding channel (1301) is provided in the semi-ring block (132), and the limiting head (1331) is slidably connected in the sliding channel (1301).

8. A flexible motor shaft coupling structure for a grease pump according to claim 7, characterized in that: The pin (5) is set through the two semi-ring blocks (132).

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