Universal jaw type one-way clutch

Abstract

According to the universal jaw type one-way clutch, the upper end of a lower shaft sleeve is sleeved with the lower end of an outer sleeve, a stepped hole in the upper end of the lower shaft sleeve is sleeved with a lower jaw disc, and clutch teeth of the lower jaw disc are attached to jaw pins of an upper jaw disc; the lower end of the upper jaw plate is sleeved in an inner hole of the lower jaw plate, and the upper end is connected with the lower end of the elastic corrugated pipe; the upper end of the elastic corrugated pipe is connected with the lower end of the upper shaft sleeve, the upper side of the upper shaft sleeve is located in an upper inner hole of the outer sleeve, and the lower spherical surface is attached to an arc inner chamfer of the upper inner hole of the outer sleeve; and the handle is inserted into the lower shaft sleeve mounting hole A and the outer sleeve mounting hole B respectively. According to the utility model, the friction force is small, the axial component force can be reduced, the elastic corrugated pipe, the jaw pin and the lower shaft sleeve have good damping performance, overload slipping caused by impact load can be effectively reduced, the overall safety of a system is improved, and the power transmission performance, the clutch frequency and the separation reliability can be improved at the same time; the utility model also has the functions of a safety clutch and an elastic coupling; and the lower shaft sleeve is in interference threaded connection with the outer sleeve, so that the looseness resistance is good.

Description

Technical Field

[0001] This utility model belongs to the field of clutches, and in particular a tooth clutch. Background Technology

[0002] A jaw clutch typically consists of a pair of jaw discs, two end bushings, and a pressure spring. It transmits power through mechanical meshing. The two end bushings connect the driving shaft and the driven shaft, respectively. The jaw discs transmit power by engaging or disengaging the clutch teeth on them. The engagement and disengagement of the driving and driven shafts are achieved by the interlocking or disengaging of the clutch teeth. The sawtooth-shaped clutch teeth have a large axial force when they reverse, pushing the jaw discs away and causing slippage. This type of clutch is commonly used in jaw clutches for one-way applications.

[0003] Compared to roller clutches, jaw clutches can withstand higher torque and speed. Compared to friction clutches, they can achieve faster slippage and unloading, and have a higher slippage frequency. When overloaded, the axial force of the clutch teeth increases accordingly, pushing the jaw clutch plate open and slipping, thus acting as a safety clutch.

[0004] However, during engagement and disengagement of a jaw clutch, the clutch teeth collide with each other and are subjected to alternating impacts, which can easily lead to fatigue fracture and fatigue wear of the clutch teeth. The clutch teeth of the two jaw clutches are in surface contact, and the friction pair is a lower pair with high friction. In addition to the requirement of a smooth mating surface, the contact surface of the clutch teeth must also have a moderate pressure angle. A large pressure angle results in a large axial force and reduced power transmission performance, while a small pressure angle results in a small axial force, making it difficult to overcome friction, making sliding difficult, and reducing separation reliability. Power transmission performance and separation reliability become a contradiction. Moreover, although overload slippage can provide overload protection for the parts to be protected to a certain extent, it may cause transmission failure and damage to other parts. Therefore, the starting load and starting frequency of overload slippage must be limited. This type of structure also has the problem of jamming failure caused by insufficient parallelism between the drive shaft and the driven shaft, resulting in lateral torque and lateral load. The requirements for the parallelism of the drive shaft and the driven shaft are relatively high. When disassembling, assembling and adjusting the preload of the compression spring, appropriate wrenches and pipe wrenches are required. The components also need to be equipped with corresponding flat squares for wrenches and pipe wrenches to hold, which takes up a lot of space and has a complex structure. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a universal jaw clutch that can ensure reliable power transmission and separation, and effectively buffer and eccentric transmission.

[0006] The present invention provides a general-purpose toothed clutch, comprising: an outer sleeve, an elastic bellows, an upper bushing, an upper toothed disc, a lower toothed disc, a handle, and a lower bushing. The upper end of the lower bushing is externally threaded into the lower end threaded hole of the outer sleeve. The upper end of the lower bushing has a stepped hole that is fixedly connected to the lower end of the lower toothed disc. The upper clutch teeth of the lower toothed disc engage with the toothed pins of the upper toothed disc. The lower end of the upper toothed disc is fitted into the inner hole of the lower toothed disc, and its upper end is fixedly connected to the lower end of the elastic bellows. The upper end of the elastic bellows is fixedly connected to the lower end of the upper bushing. The upper side of the upper bushing is located in the upper inner hole of the outer sleeve, and its lower spherical surface engages with the inner chamfer of the upper inner hole of the outer sleeve. The handle is inserted into the lower bushing mounting hole A and the outer sleeve mounting hole B, respectively.

[0007] The inner hole of the outer sleeve is a stepped hole, with a larger lower inner hole and a smaller upper inner hole; the lower end of the lower inner hole is a screw hole, the upper end is a straight hole, and the middle section is provided with annularly distributed mounting holes B; the inner side of the upper inner hole is provided with a polished arc inner chamfer to match the upper bushing.

[0008] The elastic bellows is an irregularly shaped spring composed of a disc spring with its large and small ends fixedly connected.

[0009] The eccentricity angle β is 0°–3°.

[0010] The upper outer edge of the upper bushing is cylindrical, and the lower outer edge is a polished hemispherical shape that matches the outer sleeve. The central hole is a straight hole with a keyway.

[0011] The upper tooth insert includes: a tooth insert pin and a centering ring. The inner side of the tooth insert pin is sleeved in the pin hole C of the centering ring, with the opening facing upward.

[0012] The toothed pin is a heavy-duty open-type flexible cylindrical pin with a hard chrome plated and polished outer circumference.

[0013] The centering ring has a circular structure, with evenly distributed annular pin holes C in the middle section of the outer circle, and its lower side is polished to match the inner hole of the lower tooth insert.

[0014] The lower tooth insert has a flat end at the bottom and a serrated clutch tooth at the top; the reverse pressure angle γ is 70°–75°, the forward pressure angle α is 30°–35°, and the sharp edges of the teeth are rounded; the material is ductile iron.

[0015] The lower bushing is larger on the upper side and smaller on the lower side. The upper side is a stud and the lower side is a cylinder. The lower cylinder has mounting holes A evenly distributed in annular pattern on its outer side, and the central hole is a straight hole with a keyway. The material is glass fiber filled nylon.

[0016] The inner side of the upper toothed insert pin of this utility model is sleeved in the pin hole C of the centering ring. Under the push of the elastic bellows, the toothed insert pin is in contact with the clutch teeth. The toothed insert pin and the clutch teeth are in line contact, and the friction pair is a high pair, which greatly reduces the friction force. The outer circle of the toothed insert pin is plated with hard chrome and polished, which effectively reduces the coefficient of friction and improves wear resistance. The lower toothed insert is made of ductile iron containing graphite, which has good self-lubricating effect and good wear resistance.

[0017] Because the friction is greatly reduced during clutch engagement, it can slide easily, effectively reducing the axial force required for clutch engagement while ensuring reliable disengagement. This also effectively reduces the forward rotation pressure angle α, reduces the axial force, and improves power transmission. The upward-facing opening of the toothed pin prevents it from colliding with the clutch teeth. The toothed pin is a heavy-duty open-type elastic cylindrical pin, which makes elastic contact with the clutch teeth during engagement, avoiding rigid collisions. The elastic bellows connected to the upper toothed disc is composed of disc springs, and the lower bushing is made of glass fiber-filled nylon. All three components have good shock absorption properties, effectively buffering and damping vibrations, acting as an elastic coupling, and effectively increasing the clutch frequency.

[0018] The flexible bellows not only acts as a compression spring but also serves as a flexible shaft. It eliminates lateral torque through deflection. The lower end of the upper toothed disc is fitted into the inner hole of the lower toothed disc for positioning. It is not affected by the deflection of the flexible bellows and can achieve 0°-3° eccentric transmission. The parallelism of the driving shaft and the driven shaft is greatly reduced.

[0019] The lower bushing is made of glass fiber filled nylon, which has a large compression capacity, strong and long-lasting resilience. The upper external thread of the lower bushing and the lower thread hole of the outer sleeve can be set as interference threads to effectively improve the anti-loosening performance of the threads.

[0020] When disassembling or assembling the clutch and adjusting the preload of the flexible bellows, simply insert the handle into the outer sleeve mounting hole B and the lower bushing mounting hole A respectively and turn it; no corresponding wrench or pipe wrench is required, and the parts do not need to be equipped with corresponding flat squares for wrench and pipe wrench support. It occupies little space and has a simple structure.

[0021] Compared with the existing technology, the present invention has the following advantages:

[0022] This invention has high power transmission efficiency. The friction force during clutch engagement is greatly reduced, which can effectively reduce the forward rotation pressure angle α, reduce the axial component force, and improve power transmission performance.

[0023] This invention features excellent shock absorption. The upper toothed disc has a heavy-duty open-type elastic cylindrical pin that provides elastic contact with the clutch teeth during engagement and disengagement, preventing rigid impacts. The elastic bellows connected to the upper toothed disc is composed of disc springs, and the lower bushing is made of glass fiber-filled nylon. All three components have good shock absorption properties, effectively buffering and absorbing impact loads. This effectively reduces overload slippage caused by impact loads and improves the overall safety of the system.

[0024] This invention features a high clutch frequency and good separation reliability. During clutch engagement, the friction is low, allowing for easy sliding. The toothed pin has a low coefficient of friction and good wear resistance. The lower toothed disc has good self-lubrication and wear resistance. The toothed pin, lower bushing, and elastic bellows all have good buffering and shock absorption properties, effectively reducing clutch tooth fatigue fracture and fatigue wear. The elastic bellows can also act as a flexible shaft, eliminating lateral torque and effectively preventing jamming, thus significantly improving clutch frequency and separation reliability.

[0025] This invention has strong resistance to lateral load. It can perform lateral deflection within the eccentric angle β range while transmitting torque, eliminating lateral torque. The eccentric transmission greatly reduces the impact of the parallelism between the driving shaft and the driven shaft, effectively reducing the installation accuracy requirements.

[0026] This utility model is highly versatile. It can not only perform unidirectional transmission, but also has the functions of a safety clutch and a flexible coupling, making it a multi-purpose device.

[0027] This utility model is easy to maintain. When disassembling or assembling the clutch and adjusting the preload of the elastic bellows, simply insert the handle into the outer sleeve mounting hole B and the lower shaft sleeve mounting hole A respectively and turn it.

[0028] This utility model has good thread anti-loosening performance. The upper end of the lower bushing external thread sleeve and the lower end of the outer sleeve thread hole are interference threads, which have large and lasting spring force and effectively improve the thread anti-loosening performance. Attached Figure Description

[0029] Figure 1 A schematic diagram of the structure of this utility model;

[0030] Figure 2 A schematic diagram of the upper tooth insert structure of this utility model;

[0031] Figure 3 A schematic diagram of the centering ring structure of this utility model;

[0032] Figure 4 A schematic diagram of the lower tooth insert structure of this utility model;

[0033] Figure 5 A top view of the lower tooth insert of this utility model. Detailed Implementation

[0034] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, a general-purpose toothed clutch includes: an outer sleeve 1, an elastic bellows 2, an upper bushing 3, an upper toothed disc 4, a lower toothed disc 5, a handle 6, and a lower bushing 7. The upper end of the lower bushing 7 is externally threaded into the lower end threaded hole of the outer sleeve 1, and the upper end of the lower bushing 7 is stepped into the lower end of the lower toothed disc 5 for a fixed connection. The upper clutch teeth of the lower toothed disc 5 are engaged with the toothed pins 4-1 of the upper toothed disc 4. The lower end of the upper toothed disc 4 is fitted into the inner hole of the lower toothed disc 5, and its upper end is fixedly connected to the lower end of the elastic bellows 2. The upper end of the elastic bellows 2 is fixedly connected to the lower end of the upper bushing 3. The upper side of the upper bushing 3 is located in the upper inner hole of the outer sleeve 1, and its lower spherical surface is engaged with the inner chamfer of the upper inner hole of the outer sleeve 1. The handle 6 is inserted into the mounting hole A of the lower bushing 7 and the mounting hole B of the outer sleeve 1.

[0035] The inner hole of the outer sleeve 1 is a stepped hole, with a larger lower inner hole and a smaller upper inner hole; the lower end of the lower inner hole is a screw hole, the upper end is a straight hole, and the middle section is provided with annularly distributed mounting holes B; the inner side of the upper inner hole is provided with a polished arc inner chamfer that matches the upper bushing 3.

[0036] The elastic bellows 2 is an irregularly shaped spring composed of a disc spring with its large and small ends fixedly connected.

[0037] The eccentricity angle β is 0°–3°.

[0038] The upper outer edge of the upper bushing 3 is cylindrical, and the lower outer edge is a polished hemispherical shape that matches the outer sleeve 1. The central hole is a straight hole with a keyway.

[0039] The upper tooth insert 4 includes: a tooth insert pin 4-1 and a centering ring 4-2. The inner side of the tooth insert pin 4-1 is sleeved in the pin hole C of the centering ring 4-2, with the opening facing upward.

[0040] The toothed pin 4-1 is a heavy-duty open-type elastic cylindrical pin with a hard chrome plated and polished outer circle.

[0041] The centering ring 4-2 has a circular structure, with evenly distributed annular pin holes C in the middle section of the outer circle, and its lower side is polished to match the inner hole of the lower tooth insert 5.

[0042] The lower tooth insert 5 has a flat lower end and a sawtooth-shaped clutch tooth at the upper end; the reverse pressure angle γ is 70°-75°, the forward pressure angle α is 30°-35°, and the sharp edges of the teeth are rounded; the material is ductile iron.

[0043] The lower bushing 7 is larger on the upper side and smaller on the lower side. The upper side is a stud and the lower side is a cylinder. The lower cylinder has mounting holes A evenly distributed in annular pattern on its outer side, and the central hole is a straight hole with a keyway. The material is glass fiber filled nylon.

Claims

1. A universal jaw clutch-type one-way clutch, comprising: The package includes an outer sleeve, an elastic bellows, an upper bushing, an upper toothed disc, a lower toothed disc, a handle, and a lower bushing. The upper end of the lower bushing is threaded into the lower end of the outer sleeve. The lower bushing is characterized by: a stepped hole at the upper end of the lower bushing connecting to the lower end of the lower toothed disc; the upper end of the lower toothed disc's clutch teeth engaging with the toothed pin of the upper toothed disc; the lower end of the upper toothed disc fitting into the inner hole of the lower toothed disc; the upper end of the upper toothed disc connecting to the lower end of the elastic bellows; the upper end of the elastic bellows connecting to the lower end of the upper bushing; the upper side of the upper bushing located within the upper inner hole of the outer sleeve; and the lower spherical surface conforming to the inner chamfer of the upper inner hole of the outer sleeve. The handle is inserted into the lower bushing mounting hole A and the outer sleeve mounting hole B, respectively.

2. A universal jaw clutch one-way clutch according to claim 1, characterized in that: The outer sleeve has annularly distributed mounting holes B in the middle section, and the inner side of the upper inner hole has a polished arc inner chamfer that matches the upper bushing.

3. A universal jaw clutch one-way clutch according to claim 1 or 2, characterized in that: The eccentricity angle β is 0°–3°.

4. A universal jaw clutch one-way clutch according to claim 3, characterized in that: The upper edge of the upper bushing is cylindrical, and the lower edge is a polished hemispherical shape that matches the outer sleeve.

5. A universal jaw clutch one-way clutch according to claim 4, characterized in that: The lower bushing has uniformly distributed mounting holes A on the outer annular shape of the lower cylindrical part.

6. A universal jaw clutch one-way clutch according to claim 5, characterized in that: The upper tooth insert includes: a tooth insert pin and a centering ring. The inner side of the tooth insert pin is sleeved in the pin hole C of the centering ring, with the opening facing upward.

7. A universal jaw clutch one-way clutch according to claim 6, characterized in that: The centering ring has a circular structure, with evenly distributed annular pin holes C in the middle section of the outer circle, and its lower side is polished to match the inner hole of the lower tooth insert.

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