Transmission connecting device, spinning metering pump and working method of transmission connecting device

Abstract

The present invention belongs to the field of mechanical engineering technology, and specifically relates to the field of coupling technology for transmitting rotational motion, and more particularly to a transmission connection device, a spinning metering pump, and a working method of the transmission connection device. The transmission connection device connects the metering pump gear shaft to the motor output shaft via a provided connection disk, thereby achieving power transmission. At the same time, the provided transmission assembly is configured to drive the metering pump gear shaft to rotate, and when the metering pump gear shaft is blocked from rotating, the transmission assembly releases the connection with the connection disk and simultaneously establishes a connection with the metering pump housing, thereby blocking power transmission while limiting the rotation of the gear shaft, thereby avoiding the reverse torque generated by the high-pressure melt in the metering pump, which causes the gear to rotate backward and damage the meshing surface.

Description

Technical Field

[0001] The present invention belongs to the field of mechanical engineering technology, specifically relates to the technical field of a coupling for transmitting rotational motion, and more particularly to a transmission connection device, a spinning metering pump and a working method of the transmission connection device. Background Art

[0002] During the chemical fiber spinning process, the melt enters a metering pump driven by a synchronous motor and is then fed into the spinning assembly for spinning.

[0003] During the spinning process, impurities accumulate in the spinneret assembly, increasing the resistance of the filtration layer and the pressure differential between the inlet and outlet of the metering pump. When this differential pressure exceeds the designed value, the pump gear system may suffer damage such as gear deformation and bearing fracture due to excessive torque. To address this, related technologies use shear pins as sacrificial protection for the transmission chain. When the torque exceeds a set threshold, the shear pins are sheared first, forcibly interrupting power transmission and preventing damage to the high-precision metering pump.

[0004] However, although the power transmission is interrupted after the safety pin breaks, the gear shaft of the metering pump will still have rotational inertia, and the metering pump that has lost the drive connection will push the gear in the opposite direction due to the high-pressure melt in the pump, generating reverse torque, which will cause the gear to reverse and damage the meshing surface.

[0005] Therefore, there is an urgent need to provide a transmission connection device to solve the technical problem in the related art that the gear rotates in the opposite direction after the safety pin breaks.

[0006] It should be noted that the above information disclosed in this background technology section is only used to understand the background technology of the present application concept, and therefore, the above description is not considered to constitute information of the prior art. Summary of the Invention

[0007] The embodiment of the present disclosure provides at least one transmission connection device, comprising: a connection plate configured to connect a metering pump gear shaft to a motor output shaft; and

[0008] A transmission assembly sleeved on the outside of the metering pump gear shaft;

[0009] The transmission assembly includes: a shaft sleeve and a sliding sheet sleeved on the outside of the metering pump gear shaft;

[0010] The shaft sleeve is provided with a sliding piece receiving groove, and a resistance spring is provided at the bottom of the sliding piece receiving groove; and

[0011] A sinking groove is provided on the inner wall of the through hole of the connecting plate, and a pushing plate is provided at the bottom of the sinking groove;

[0012] The resistance spring is configured to apply a pushing force to the sliding plate to push the lower half of the sliding plate into the sink, so that the sliding plate contacts the push plate;

[0013] The push plate is configured to push the sliding plate upward when the rotation of the gear shaft is blocked, so that the lower half of the sliding plate is moved out of the sink.

[0014] In an optional embodiment, the surface of the push plate that contacts the sliding sheet is an inclined surface;

[0015] The surfaces of the sliding piece and the pushing plate that contact each other are both inclined surfaces.

[0016] In an optional embodiment, the transmission assembly further comprises a friction ring provided on the metering pump housing;

[0017] The friction ring is arranged on the periphery of the shaft sleeve; and

[0018] The friction ring is configured to apply friction force to the moved-out sliding sheet to restrict the gear shaft from rotating.

[0019] In an optional embodiment, the end of the friction ring that contacts the sliding sheet is arranged as an inclined surface; and

[0020] The surfaces of the sliding sheet and the friction ring that are in contact are both inclined surfaces.

[0021] The embodiment of the present disclosure further provides at least one spinning metering pump, comprising: the transmission connection device described above; a metering pump body and a driving motor body;

[0022] The gear shaft of the metering pump body is connected to the motor output shaft of the drive motor body through a connecting disc.

[0023] The embodiment of the present disclosure further provides at least one operating method of a transmission connection device, including:

[0024] The transmission connection device is used to connect the metering pump gear shaft to the motor output shaft through the connecting plate;

[0025] The connecting disk is driven to rotate by the rotation of the motor output shaft;

[0026] Drive the transmission assembly through the connecting plate and then drive the gear shaft to rotate; and

[0027] When the gear shaft is blocked from rotating, the transmission assembly releases the transmission with the connecting disk, thereby causing the gear shaft to stop rotating;

[0028] The transmission assembly includes: a shaft sleeve and a sliding sheet sleeved on the outside of the metering pump gear shaft;

[0029] The shaft sleeve is provided with a sliding piece receiving groove, and a resistance spring is provided at the bottom of the sliding piece receiving groove; and

[0030] A sinking groove is provided on the inner wall of the through hole of the connecting plate, and a pushing plate is provided at the bottom of the sinking groove;

[0031] The resistance spring is configured to apply a pushing force to the sliding plate to push the lower half of the sliding plate into the sink, so that the sliding plate contacts the push plate;

[0032] The push plate is configured to push the sliding plate upward when the rotation of the gear shaft is blocked, so that the lower half of the sliding plate is moved out of the sink.

[0033] In an optional embodiment, the method of driving the transmission assembly and then driving the gear shaft to rotate through the connecting disk includes:

[0034] The connecting disc rotates to enable the push plate to push the sliding piece to rotate, thereby driving the gear shaft to rotate.

[0035] In an optional embodiment, when the rotation of the gear shaft is blocked, the method of releasing the transmission assembly from the connecting disk, thereby stopping the gear shaft, includes:

[0036] When the gear shaft is blocked, the push plate overcomes the pushing force of the resistance spring and pushes the sliding plate upward to release the connection between the sliding plate and the sink groove of the connecting plate; and

[0037] When the sliding plate moves upward, its tail end contacts the friction ring, thereby increasing its rotational resistance and limiting the rotation of the gear shaft.

[0038] The beneficial effect of the present invention is that the transmission connection device connects the metering pump gear shaft and the motor output shaft through the provided connecting disk, thereby realizing power transmission. At the same time, the provided transmission assembly is configured to drive the metering pump gear shaft to rotate, and when the rotation of the metering pump gear shaft is blocked, the transmission assembly releases the connection with the connecting disk and establishes a connection with the metering pump housing at the same time, thereby blocking the power transmission while limiting the rotation of the gear shaft, avoiding the reverse push of the gear by the high-pressure melt in the metering pump, generating reverse torque, and causing the gear to reverse and damage the meshing surface.

[0039] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0040] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0042] Figure 1 A schematic diagram of the three-dimensional structure of a transmission connection device provided by an embodiment of the present disclosure is shown;

[0043] Figure 2 A schematic diagram showing the connection relationship between the transmission connection device and the metering pump provided in an embodiment of the present disclosure is shown;

[0044] Figure 3 A schematic diagram showing the connection relationship between the transmission connection device and the metering pump housing provided by an embodiment of the present disclosure is shown;

[0045] Figure 4 for Figure 3 Schematic diagram of the viewing angle along direction F;

[0046] Figure 5 A schematic diagram of the three-dimensional structure of a spinning metering pump provided in an embodiment of the present disclosure is shown;

[0047] Figure 6 A front view of a spinning metering pump provided by an embodiment of the present disclosure is shown.

[0048] In the picture:

[0049] 1. Connecting plate; 2. Transmission assembly; 20. Bushing; 21. Sliding plate; 201. Sliding plate receiving groove; 22. Resistance spring; 23. Push plate; 24. Friction ring; 240. Sink; 3. Drive motor body; 31. Motor output shaft; 4. Metering pump body; 41. Metering pump gear shaft. DETAILED DESCRIPTION

[0050] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0051] It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings. In addition, in the drawings, the thickness of components may be exaggerated or reduced in order to effectively describe the technical content.

[0052] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features therein may be combined with each other.

[0053] See also Figure 1 , Figure 1 A transmission connection device is shown, comprising: a connecting disk 1, which is configured to connect the metering pump gear shaft to the motor output shaft 31; and a transmission assembly 2 sleeved on the outside of the metering pump gear shaft 41; wherein the sliding plate 21 in the transmission assembly 2 is adapted to the recessed groove 240 provided on the inner wall of the through hole of the connecting disk 1; and the transmission assembly 2 is configured to drive the metering pump gear shaft 41 to rotate, and when the rotation of the gear shaft is obstructed, it disengages from the recessed groove 240 and abuts against the metering pump housing to limit the rotation of the gear shaft.

[0054] In some embodiments, the metering pump gear shaft 41 is connected to the motor output shaft 31 through a connecting disk 1, thereby realizing power transmission. At the same time, the transmission assembly 2 is configured to drive the metering pump gear shaft 41 to rotate, and when the rotation of the metering pump gear shaft 41 is obstructed, the transmission assembly 2 releases the connection with the connecting disk 1 and establishes a connection with the metering pump housing, thereby blocking the power transmission while limiting the rotation of the gear shaft, avoiding the reverse push of the gear by the high-pressure melt in the metering pump, generating reverse torque, and causing the gear to reverse and damage the meshing surface.

[0055] See also Figure 2 、 Figure 3 and Figure 4 Specifically, the transmission assembly 2 includes: a sleeve 20 mounted on the outside of the gear shaft; a sliding plate accommodating groove 201 is provided on the sleeve 20; and a resistance spring 22 is provided at the bottom of the sliding plate accommodating groove 201; wherein the resistance spring 22 is configured to apply a pushing force to the sliding plate 21 to push the lower half of the sliding plate 21 into the sinking groove 240.

[0056] As a preferred embodiment, the shaft sleeve 20 and the gear shaft are connected in an assembled manner, and the receiving groove 201 opened on the shaft sleeve 20 cooperates with the sliding plate 21 to form a connection method equivalent to a safety pin, and the resistance spring 22 set at the bottom of the receiving groove 201 serves as a standard for the torque threshold.

[0057] Specifically, when the gear shaft can rotate smoothly, the resistance spring 22 pushes the sliding piece 21 downward, so that the lower end of the sliding piece 21 extends into the sink groove 240, so that the friction between the sliding piece 21 and the push plate 23 makes the two contact, thereby connecting the gear shaft and the connecting disk 1 and achieving joint rotation. When the gear shaft encounters resistance in rotation, the push plate 23 in the transmission assembly 2 will push the sliding piece 21 to overcome the spring resistance and move upward, thereby releasing the connection between the sliding piece 21 and the sink groove 240. By changing the resistance spring 22 with different elastic strengths, the torque threshold can be adjusted.

[0058] See also Figure 4 As a preferred embodiment, since the direction of the torsional force on the sliding piece 21 is inconsistent with the direction of the elastic force of the resistance spring 22, the contact surfaces of the push plate 23 and the sliding piece 21 are first set to be inclined surfaces, so that the sliding piece 21 can slide up and down. In addition, when selecting the spring, the lateral torsional force is decomposed into the vertical elastic force through force decomposition, and then the spring is selected according to the elastic force, so as to obtain a spring that meets the safety requirements of the metering pump.

[0059] Specifically, since the sliding piece 21 partially extends into the sink groove 240, when normal power is transmitted, the connecting disk 1 is rotated by the driving force of the driving motor. At this time, the push plate 23 rotates following the connecting disk 1 and drives the sliding piece 21 to rotate. The sliding piece 21 drives the shaft sleeve 20 to rotate, thereby realizing the rotation of the metering pump gear shaft 41. When the resistance in the metering pump exceeds the threshold, the push plate 23 will slip off the sliding piece 21, that is, when the resistance in the metering pump is too large, the push plate 23 will squeeze the sliding piece while rotating following the connecting disk 1 to overcome the elastic force of the resistance spring 22 and move backward to release the connection between the two, thereby blocking the transmission of power.

[0060] In some embodiments, the transmission assembly 2 further includes a friction ring 24 disposed on the metering pump housing; the friction ring 24 is sleeved on the periphery of the sleeve 20; and the friction ring 24 is configured to apply friction to the removed sliding sheet 21 to limit the rotation of the gear shaft.

[0061] Specifically, the friction ring 24 is provided on the metering pump housing to solve the problem of rotational inertia of the gear shaft. Since the sliding piece 21 is moved out of the sink groove 240 due to the extrusion force, when the connecting disk 1 continues to rotate due to the rotation of the motor, the sliding piece 21 will be pressed against the inner wall of the connecting disk 1 due to the thrust of the resistance spring 22. In this regard, the gear shaft may continue to rotate due to the friction between the sliding piece 21 and the connecting disk 1. The friction ring 24 is fixedly provided on the metering pump housing, and the metering pump housing is fixedly provided. Therefore, the rotational resistance of the sliding piece 21 is increased by the provided friction ring 24, thereby achieving a deceleration braking effect, avoiding the inertia of the gear shaft to rotate forward and the high-pressure melt to push the gear in the reverse direction, resulting in reverse rotation.

[0062] As an optional embodiment, the end of the friction ring 24 that contacts the sliding plate 21 is configured as an inclined surface; and the surface of the sliding plate 21 that contacts the friction ring 24 is also an inclined surface, thereby fully increasing the contact area between the two to provide sufficient braking resistance.

[0063] See also Figure 5 and Figure 6 , Figure 5 and Figure 6 A spinning metering pump is shown, comprising: the above-mentioned transmission connection device; a metering pump body 4 and a driving motor body 3; the gear shaft of the metering pump body 4 is connected to the motor output shaft 31 of the motor body through a connecting disk 1.

[0064] On the other hand, some embodiments also provide a working method of a transmission connection device, including: adopting a transmission connection device as described above, and connecting the metering pump gear shaft 41 to the motor output shaft 31 through the connecting disk 1; driving the connecting disk 1 to rotate by rotating the motor output shaft 31; driving the transmission assembly 2 through the connecting disk 1 and then driving the gear shaft to rotate; and when the rotation of the gear shaft is blocked, the transmission assembly 2 releases the transmission with the connecting disk 1, thereby causing the gear shaft to stop rotating.

[0065] In some embodiments, the method of driving the transmission assembly 2 and then driving the gear shaft to rotate by the connecting disk 1 includes: rotating the connecting disk 1 so that the pushing plate 23 pushes the sliding piece 21 to rotate, thereby driving the gear shaft to rotate.

[0066] To sum up, the transmission connection device connects the metering pump gear shaft 41 with the motor output shaft 31 through the provided connecting disk, thereby realizing power transmission. At the same time, the provided transmission assembly is configured to drive the metering pump gear shaft 41 to rotate, and when the rotation of the metering pump gear shaft 41 is obstructed, the transmission assembly releases the connection with the connecting disk and establishes a connection with the metering pump housing at the same time, thereby blocking the power transmission while limiting the rotation of the gear shaft, changing the existing way of breaking the safety pin, and thus avoiding the reverse push of the gear by the high-pressure melt in the metering pump, generating reverse torque, thereby causing the gear to reverse and damage the meshing surface.

[0067] Herein, when it is mentioned that a first component is located on a second component, this may mean that the first component may be directly formed on the second component or a third component may be interposed between the first component and the second component.

[0068] As used herein, when an element or layer is referred to as being "located on," "engaged to," "connected to," "attached to," or "coupled to" another element or layer, it may be directly located on, engaged, connected, attached to, or coupled to the other element or layer, or there may be intervening elements or layers. Conversely, when an element is referred to as being "directly on," "directly engaged to," "directly connected to," "directly attached to," or "directly coupled to" another element or layer, there may be no intervening elements or layers. Other words used to describe the relationship between elements should be interpreted in a similar manner (e.g., "between" versus "directly between," "adjacent" versus "directly adjacent," etc.). As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0069] With the above-described preferred embodiments of the present invention as a guide, and with reference to the above description, relevant personnel are fully capable of making various changes and modifications without departing from the technical scope of this invention. The technical scope of this invention is not limited to the contents of the specification and must be determined according to the scope of the claims.

Claims

1. A transmission connection device, characterized in that: include: A connecting disc (1) configured to connect the metering pump gear shaft (41) to the motor output shaft (31); and A transmission assembly (2) sleeved on the outer side of the metering pump gear shaft; The transmission assembly (2) comprises: a shaft sleeve (20) and a sliding plate (21) sleeved on the outside of the metering pump gear shaft (41); The shaft sleeve (20) is provided with a sliding piece receiving groove (201), and a resistance spring (22) is provided at the bottom of the sliding piece receiving groove (201); and A sinking groove (240) is provided on the inner wall of the through hole of the connecting plate (1), and a pushing plate (23) is provided at the bottom of the sinking groove (240); wherein The resistance spring (22) is configured to apply a pushing force to the sliding plate (21) to push the lower half of the sliding plate (21) into the sink, so that the sliding plate (21) contacts the push plate (23); wherein The pushing plate (23) is configured to push the sliding plate (21) upward when the rotation of the gear shaft is blocked, so that the lower half of the sliding plate (21) is moved out of the sink (240).

2. The transmission connection device according to claim 1, characterized in that: The push plate (23) and the sliding plate (21) have a contact surface that is an inclined surface; The surfaces of the sliding piece (21) and the push plate (23) that contact each other are both inclined surfaces.

3. The transmission connection device according to claim 2, characterized in that: The transmission assembly (2) further comprises a friction ring (24) arranged on the metering pump housing; The friction ring (24) is sleeved on the outer periphery of the shaft sleeve; and The friction ring (24) is configured to apply friction to the moved sliding sheet (21) to limit the rotation of the gear shaft.

4. The transmission connection device according to claim 3, characterized in that: The end of the friction ring (24) in contact with the sliding plate (21) is arranged as an inclined surface; and The surfaces of the sliding sheet (21) and the friction ring (24) that are in contact are both inclined surfaces.

5. A spinning metering pump, characterized in that: include: Adopting the transmission connection device according to any one of claims 1 to 4; as well as A metering pump body (4) and a drive motor body (3); The gear shaft of the metering pump body (4) is connected to the motor output shaft of the drive motor body (3) via a connecting disc (1).

6. A working method of a transmission connection device, characterized in that: include: Using the transmission connection device according to any one of claims 1 to 4, and Connect the metering pump gear shaft to the motor output shaft via a connecting plate (1); The connecting disk (1) is driven to rotate by the rotation of the motor output shaft; The connecting disc (1) drives the transmission assembly (2) and then drives the gear shaft to rotate; and When the rotation of the gear shaft is blocked, the transmission assembly (2) releases the transmission from the connecting disk (1), thereby causing the gear shaft to stop rotating; in The transmission assembly (2) comprises: a shaft sleeve (20) and a sliding plate (21) sleeved on the outside of the metering pump gear shaft; The shaft sleeve (20) is provided with a sliding piece receiving groove (201), and a resistance spring (22) is provided at the bottom of the sliding piece receiving groove (201); and A sinking groove (240) is provided on the inner wall of the through hole of the connecting plate (1), and a pushing plate (23) is provided at the bottom of the sinking groove (240); wherein The resistance spring (22) is configured to apply a pushing force to the sliding plate (21) to push the lower half of the sliding plate (21) into the sink, so that the sliding plate (21) contacts the push plate (23); wherein The pushing plate (23) is configured to push the sliding plate (21) upward when the rotation of the gear shaft is blocked, so that the lower half of the sliding plate (21) is moved out of the sink (240).

7. The working method according to claim 6, characterized in that: The method of driving the transmission assembly (2) and thereby driving the gear shaft to rotate via the connecting disk (1) includes: The connecting disk (1) rotates so that the pushing plate (23) pushes the sliding plate (21) to rotate, thereby driving the gear shaft to rotate.

8. The working method according to claim 7, characterized in that: The method of releasing the transmission assembly (2) from the connecting disk (1) when the rotation of the gear shaft is blocked, thereby causing the gear shaft to stop rotating, comprises: When the gear shaft is blocked, the push plate (23) overcomes the pushing force of the resistance spring (22) to push the sliding plate (21) upward to release the connection between the sliding plate (21) and the sink groove of the connecting plate (1); and When the sliding plate (21) moves upward, its tail end contacts the friction ring (24), thereby increasing its rotation resistance and limiting the rotation of the gear shaft.

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