Dual power source belt wheel and clutch device thereof

Abstract

The utility model provides a double power source pulley and clutch device thereof, which comprises a low-speed driving shaft, an internal driving body, a pin shaft, an elastic reset part, a wedge block and a shell, wherein the internal driving body is coaxially arranged inside the shell, and the outer circular surface of the internal driving body is provided with a notch; a plurality of transmission grooves are integrally arranged on the outer circumferential surface of the lower side of the shell, a plurality of profiled notches are arranged on the inner circumferential surface of the shell, and a first pin hole is arranged at the bottom of each profiled notch; the wedge block is arranged in the annular space surrounded by the outer circular surface of the internal driving body and the profiled notch; a second pin hole and a groove are arranged on the wedge block, the pin shaft is fixedly connected with the first pin hole after penetrating through the second pin hole, the elastic reset part is arranged on the pin shaft, one end of the elastic reset part is matched with the groove, and the other end is abutted against the inner wall of the shell. The clutch system composed of the wedge block and the elastic reset part is adopted, so that the wedge block will not be worn in the high-speed rotating state or the low-speed rotating state of the device, and the device has small overall occupied space and low cost.

Description

Technical Field

[0001] This invention relates to the field of clutch device technology, specifically to a dual-power-source pulley for a centrifuge and its clutch device. Background Technology

[0002] In centrifuge applications, high rotational speeds are often required to achieve optimal separation. However, for production processes necessitating multi-speed centrifuges, power needs to be introduced at different stages, ensuring stable power flow without interference. For example, top-mounted centrifuges typically use variable frequency drive (VFD) control for the main motor, starting at low speed and gradually accelerating to high speed. When cleaning the filter cake, a lower speed is usually required, necessitating the introduction of a secondary power source to meet these process requirements. Currently, the industry commonly uses a clutch to achieve this functionality.

[0003] In existing technologies, dual-power-source pulley clutches typically employ friction clutches, jaw clutches, or electromagnetic clutches. Friction clutches transmit torque through the clamping force between friction plates, but suffer from problems such as easy wear of the friction plates, high heat generation, decreased transmission efficiency after long-term use, and high maintenance costs. Jaw clutches achieve power switching through the engagement and disengagement of end-face teeth. While reliable, they often require axially moving parts during switching, demanding high installation precision, and are prone to shock and noise during power switching. Electromagnetic clutches control the clutch state through electromagnetic force, offering fast response, but their structure is relatively complex, requiring electromagnetic coils and power supply lines, occupying significant space, and incurring high costs. Summary of the Invention

[0004] Therefore, it is necessary to address the problems of easy wear, high heat generation, easy impact and noise during power switching, and high cost of existing dual-power source clutches, and to provide a dual-power source pulley and its clutch device. The clutch system is composed of a wedge and an elastic reset element, so that the wedge will not wear whether the device is in high-speed or low-speed rotation, and the overall space occupied is small and the cost is low.

[0005] A dual-power-source pulley and its clutch device are disclosed. The dual-power-source pulley and its clutch device include a low-speed drive shaft, an internal drive body, a pin, an elastic reset member, a wedge, and a housing. The internal drive body is coaxially disposed inside the housing, and its outer circumferential surface has a notch. The outer circumferential surface of the lower side of the housing has multiple transmission grooves integrally formed, and the inner circumferential surface of the housing has multiple contoured slots, each contoured slot having a first pin hole at its bottom. The wedge is disposed within the annular space formed by the outer circumferential surface of the internal drive body and the contoured slots. The wedge has a second pin hole and a groove. The pin passes through the second pin hole and is fixedly connected to the first pin hole. The elastic reset member passes through the pin, with one end engaging with the groove and the other end abutting against the inner wall of the housing. The dual-power-source pulley and its clutch device switch between high-speed and low-speed rotation states by applying a radial reset force to the wedge through the elastic reset member.

[0006] Furthermore, the dual-power source pulley and its clutch device also include a baffle plate, which is connected to the lower end face of the low-speed drive shaft by bolts.

[0007] Furthermore, the dual-power source pulley and its clutch device also include a housing cover, which is fixed to the upper surface of the housing and presses against the pin.

[0008] Furthermore, a flat key is provided between the low-speed drive shaft and the shaft hole of the internal drive body.

[0009] Furthermore, the wedge has an arc-shaped structure, and the arc-shaped inner surface of the wedge is a wedge-tightening surface, which engages with the surface of the notch under the action of the elastic reset member.

[0010] Furthermore, the arc-shaped outer surface of the wedge matches the inner surface of the contoured groove.

[0011] Furthermore, the elastic reset element is a torsion spring, one end of which is fixed in the groove and the other end abuts against the inner wall of the outer shell.

[0012] Furthermore, the transmission groove is a V-shaped groove.

[0013] Furthermore, the number of the contoured groove, the wedge, the elastic reset member, and the notch are matched, with at least three of each.

[0014] Furthermore, four of each of the following are provided: the contoured groove, the wedge, the elastic reset element, and the notch.

[0015] The beneficial effects of this invention are: By coaxially integrating components such as the low-speed drive shaft, internal drive body, wedge block, elastic reset component, and housing into a single unit, the overall structure is compact, occupies little space, and is easy to install in limited spaces. A transmission groove is located at the lower part of the housing, where a belt drives the device to rotate at high speed. A low-speed rotating shaft is coaxially mounted at the upper end of the housing, driving the device to rotate at low speed.

[0016] The switching between high-speed and low-speed rotation states is achieved by utilizing the balance between the centrifugal force and the elastic restoring force experienced by the wedge during rotation. When the belt drives the outer casing to rotate at high speed, the centrifugal force on the wedge is greater than the elastic restoring force. The wedge is accommodated in the contoured groove, separating from the outer surface of the internal drive body. This avoids additional resistance and wear caused by contact between the wedge and the outer surface of the internal drive body, reducing energy loss and extending the service life of the device. In the low-speed rotation state, the centrifugal force on the wedge is less than the elastic restoring force. Under the action of the elastic restoring force, the wedge moves to the notch of the internal drive body and weds tightly with the notch surface. Torque is transmitted through the pin shaft, and the low-speed rotation shaft drives the device to rotate at low speed. Attached Figure Description

[0017] Figure 1 This is an exploded view of a dual-power source pulley and its clutch device according to the present invention; Figure 2 This is a cross-sectional view of a dual-power source pulley and its clutch device according to the present invention; Figure 3 This is a schematic diagram of the structure of a dual-power source pulley and its clutch device according to the present invention; Figure 4 This is a schematic diagram of the wedge block of the present invention; Figure 5 This is a top view of a dual-power-source pulley and its clutch device according to the present invention. Attached Figure

[0018] 1. Low-speed drive shaft, 2. Internal drive body, 3. Baffle plate, 4. Housing cover, 5. Pin, 6. Elastic reset component, 7. Wedge block, 8. Housing, 9. Flat key, 10. Bolt, 201. Notch, 202. Shaft hole, 701. Groove, 702. Second pin hole, 801. Transmission groove, 802. Contouring groove, 803. First pin hole. Detailed Implementation

[0019] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0020] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," "top," "bottom," "end," "top," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0022] This invention provides a dual-power source pulley and its clutch device. The dual-power source pulley and its clutch device include a low-speed drive shaft, an internal drive body, a pin, an elastic reset member, a wedge, and a housing. The internal drive body is coaxially disposed inside the housing, and its outer circumferential surface has a notch. The outer circumferential surface of the lower side of the housing has multiple transmission grooves integrally formed, and the inner circumferential surface of the housing has multiple contoured slots, each contoured slot having a first pin hole at its bottom. The wedge is disposed within the annular space formed by the outer circumferential surface of the internal drive body and the contoured slots. The wedge has a second pin hole and a groove. The pin passes through the second pin hole and is fixedly connected to the first pin hole. The elastic reset member passes through the pin, with one end engaging with the groove and the other end abutting against the inner wall of the housing. The dual-power source pulley and its clutch device switch between high-speed and low-speed rotation states by applying a radial reset force to the wedge through the elastic reset member.

[0023] This invention provides a dual-power-source pulley and its clutch device. By coaxially integrating components such as the low-speed drive shaft, internal drive body, wedge block, elastic reset element, and housing into one unit, the overall structure is compact, occupies little space, and is easy to install in limited spaces. A transmission groove is provided at the lower part of the housing, through which the device is driven to rotate at high speed by a belt. A low-speed rotating shaft is coaxially provided at the upper end of the housing, driving the device to rotate at low speed.

[0024] The following description, in conjunction with specific embodiments, illustrates the dual-power-source pulley and its clutch device to further understand the inventive concept of the dual-power-source pulley and clutch device.

[0025] In one embodiment, such as Figures 1-5As shown, the dual-power source pulley and its clutch device include a low-speed drive shaft 1, an internal drive body 2, a baffle 3, a housing cover 4, a pin 5, an elastic reset component 6, a wedge 7, a housing 8, and a flat key 9; the internal drive body 2 is coaxially disposed inside the housing 8, and the outer circular surface of the internal drive body 2 is provided with a notch 201; the outer circumferential surface of the lower side of the housing 8 is integrally provided with multiple transmission grooves 801, and a belt is usually placed in each of the transmission grooves 801, and the high-speed rotation power is transmitted through the belt to drive the device to rotate at high speed. The inner circumferential surface of the outer shell 8 has multiple contoured slots 802, and each contoured slot 802 has a first pin hole 803 at its bottom. The wedge 7 is disposed within the annular space formed by the outer circumferential surface of the internal drive body 2 and the contoured slots 802. The wedge 7 has a second pin hole 702 and a groove 701. The pin 5 passes through the second pin hole 702 and is fixedly connected to the first pin hole 803. The elastic reset member 6 passes through the pin 5, with one end engaging with the groove 701 and the other end abutting against the inner wall of the outer shell 8. The wedge 7 can rotate around the pin 5 under the action of the elastic reset force of the elastic reset member 6. The elastic reset member 6 applies a radial reset force to the wedge 7 to complete the switching between high-speed and low-speed rotation states of the dual power source pulley and its clutch device. The baffle 3 is connected to the lower end face of the low-speed drive shaft 1 by bolts 10 to achieve reliable axial fixation between the low-speed drive shaft 1 and the internal drive body 2. The outer casing cap 4 is fixed to the upper surface of the outer casing 8 and presses the pin 5. A flat key 9 is also provided between the low-speed drive shaft 1 and the shaft hole 202 of the internal drive body 2. Correspondingly, the outer peripheral surface of the lower end of the low-speed drive shaft 1 and the inner peripheral surface of the shaft hole 202 are provided with keyways for installing the flat key 9. The low-speed drive shaft 1 and the internal drive body 2 are connected by the flat key 9, thereby transmitting the rotational power on the low-speed drive shaft 1 to the internal drive body 2.

[0026] The wedge 7 has an arc-shaped structure, and its arc-shaped inner surface is a wedge-tightening surface, which engages with the surface of the notch 201 under the elastic restoring force of the elastic restoring member 6. The arc-shaped outer surface of the wedge 7 engages with the inner surface of the contoured groove 802.

[0027] In this embodiment, when the dual power source pulley and its clutch device are rotating at high speed, the outer shell 8 is driven to rotate at high speed by the belt. At this time, the centrifugal force on the wedge 7 is greater than the elastic reset force of the elastic reset member 6. Under the action of centrifugal force, the wedge 7 swings into the contoured groove 802. The arc-shaped outer surface of the wedge 7 cooperates with the inner surface of the contoured groove 802, and the arc-shaped inner surface of the wedge 7 separates from the outer circular surface of the internal drive body 2. When the wedge 7 rotates at high speed with the outer shell 8, it will not wear with the internal drive body 2, thus extending the service life of the wedge 7. The internal drive body 2 and the low-speed drive shaft 1 will not rotate at high speed with the outer shell 8.

[0028] When the dual-power-source pulley and its clutch device are rotating at low speed, the belt stops providing power, that is, the power for the high-speed rotation of the outer shell 8 is withdrawn, and the low-speed rotating shaft 1 provides power to drive the device to rotate at low speed. At this time, the centrifugal force on the wedge 7 is less than the elastic restoring force of the elastic restoring member 6. Under the action of the elastic restoring force, the wedge 7 moves into the notch 201 and abuts against the notch 201. The arc-shaped outer surface of the wedge 7 separates from the inner surface of the contoured groove 802. The low-speed drive shaft 1 drives the internal drive body 2 to rotate at low speed. Since the pin 5 is fixedly connected to the first pin hole on the outer shell 8, the power is transmitted to the outer shell 8 through the wedge 7 and the pin 5, so that the entire device rotates at low speed.

[0029] In another embodiment, such as Figure 1 As shown, the elastic reset member 6 is a torsion spring, one end of which is fixed in the groove 701 and the other end abuts against the inner wall of the outer shell 8.

[0030] In another embodiment, such as Figure 2 As shown, the transmission groove 801 is a V-shaped groove, and each V-shaped groove is fitted with a belt.

[0031] In another embodiment, such as Figure 1 As shown, the number of the contoured groove 802, the wedge 7, the elastic reset member 6, and the notch 201 are matched, with at least three of each. Preferably, four of each are provided. That is, each wedge 7 is provided with an independent elastic reset member 6, and the reset action of each wedge 7 is independent of each other, ensuring the synchronous engagement and separation of all wedges 7, improving the consistency and reliability of the device's operation, and avoiding uneven transmission or jamming caused by asynchronous action of individual wedges.

[0032] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0033] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A dual-power-source pulley and its clutch device, the dual-power-source pulley and its clutch device comprising a low-speed drive shaft (1), an internal drive body (2), a pin (5), an elastic reset element (6), a wedge (7), and a housing (8); characterized in that, The internal drive body (2) is coaxially disposed inside the outer shell (8), and the outer circular surface of the internal drive body (2) is provided with a notch (201); the outer circumferential surface of the lower side of the outer shell (8) is integrally provided with multiple transmission grooves (801), and the inner circumferential surface of the outer shell (8) is provided with multiple contoured slots (802), and the bottom of each contoured slot (802) is provided with a first pin hole (803); the wedge (7) is disposed in the annular space formed by the outer circular surface of the internal drive body (2) and the contoured slots (802); the wedge (7) The pin shaft (5) has a second pin hole (702) and a groove (701) on it. After the pin shaft (5) passes through the second pin hole (702), it is fixedly connected to the first pin hole (803). The elastic reset member (6) passes through the pin shaft (5). One end of the elastic reset member (6) cooperates with the groove (701), and the other end abuts against the inner wall of the outer shell (8). The elastic reset member (6) applies a reset force to the wedge block (7) in the radial direction to complete the switching between the high-speed rotation state and the low-speed rotation state of the dual power source pulley and its clutch device.

2. The dual-power source pulley and its clutch device according to claim 1, characterized in that, The dual power source pulley and its clutch device also include a baffle (3), which is connected to the lower end face of the low-speed drive shaft (1) by bolts (10).

3. The dual-power source pulley and its clutch device according to claim 1, characterized in that, The dual power source pulley and its clutch device also include a housing cover (4), which is fixed to the upper surface of the housing (8) and presses the pin (5).

4. The dual-power source pulley and its clutch device according to claim 1, characterized in that, A flat key (9) is also provided between the low-speed drive shaft (1) and the shaft hole (202) of the internal drive body (2).

5. The dual-power source pulley and its clutch device according to claim 1, characterized in that, The wedge (7) has an arc-shaped structure, and the arc-shaped inner surface of the wedge (7) is a wedge-tightening surface, which cooperates with the surface of the notch (201) under the action of the elastic reset member (6).

6. According to claim 1, the arc-shaped outer surface of the wedge (7) is matched with the inner surface of the contoured groove (802).

7. The dual-power source pulley and its clutch device according to claim 1, characterized in that, The elastic reset member (6) is a torsion spring, one end of which is fixed in the groove (701) and the other end abuts against the inner wall of the outer shell (8).

8. The dual-power source pulley and its clutch device according to claim 1, characterized in that, The transmission groove (801) is a V-shaped groove.

9. A dual-power source pulley and its clutch device according to claim 1, characterized in that, The number of the contoured groove (802), the wedge (7), the elastic reset member (6), and the notch (201) are matched, with at least three of each.

10. A dual-power source pulley and its clutch device according to claim 1, characterized in that, The contoured groove (802), the wedge (7), the elastic reset member, and the notch (201) are each provided in four parts.

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