Overload protection device with reverse-rotation-preventing air cooling function

Abstract

The utility model provides an overload protection device with an anti-reversion air cooling function. The overload protection device comprises a base and a spline shaft rotationally installed on the base. The base is connected with the power input end of driven equipment; the spline shaft is connected with the power output end of the driving equipment; the anti-reverse wheel shell is connected to the spline shaft in a sleeving mode, and an elastic locking piece is installed between the anti-reverse wheel shell and the spline shaft; the anti-reverse wheel further comprises friction plates and a middle clamping plate, the middle clamping plate is installed between the two friction plates, the middle clamping plate extends outwards and is fixedly connected with the base, the outer wall of the anti-reverse wheel shell is sleeved with cover plates, and the cover plates are arranged on the two sides of the friction plates respectively. The spring fastening bolt is used for fastening connection among the friction plate, the middle clamping plate and the cover plate; the outer wall of the anti-reverse wheel shell and the inner wall of the cover plate are arranged to be of the same special-shaped structure. The anti-reverse-rotation overload protection device achieves anti-reverse-rotation and overload protection of agricultural machinery in emergency situations, and is stable in operation and high in reliability.

Description

Technical Field

[0001] The utility model belongs to the technical field of protective equipment for agricultural machinery, and in particular relates to an overload protection device with anti-reverse wind cooling. Background Art

[0002] The torque protection device is a device used to protect mechanical equipment. Its working principle is to control the torque to prevent the equipment from being damaged due to overload or abnormal torque.

[0003] At present, the torque overload protection devices used in my country's driven agricultural machinery mainly include friction plate type, marble type, cam type and shear type. Friction plate type torque overload protection device is more commonly used. When the power transmission of the equipment encounters overload or abnormal torque, the friction plate slips and unloads, which has a good effect on protecting the equipment. However, due to the slipping, friction and heat of the friction plate in the case of overload or abnormal torque, the torque transmission effect is affected. Overheating can also cause damage to the friction plate, affecting the normal operation of the equipment. At the same time, when the direction of the power speed is inconsistent with the equipment, the power cannot be effectively cut off, resulting in equipment damage. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the utility model provides a cooling overload protection device with anti-reverse wind, which realizes anti-reverse and overload protection of equipment and runs smoothly and reliably.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A device with anti-reverse wind cooling overload protection comprises a base and a spline shaft rotatably mounted on the base;

[0007] A base connected to a power input terminal of a driven device;

[0008] A spline shaft connected to a power output end of a driving device;

[0009] An anti-reverse wheel housing is sleeved on the spline shaft and an elastic locking member is installed between the spline shaft and the anti-reverse wheel housing;

[0010] It also includes a friction plate and an intermediate clamping plate, wherein the intermediate clamping plate is installed between the two friction plates, the intermediate clamping plate extends outward and is fixedly connected to the base, and a cover plate is sleeved on the outer wall of the anti-rebound wheel housing, and two cover plates are arranged opposite to each other and are respectively arranged on both sides of the friction plate;

[0011] Spring fastening bolts, which are used for fastening connection between the friction plate, the middle clamping plate and the cover plate;

[0012] The outer wall of the anti-rebound wheel housing and the inner wall of the cover plate are arranged as special-shaped structures with the same shape.

[0013] In a preferred embodiment of the utility model, the elastic locking member includes a square key and a leaf spring, a mounting groove for the square key is opened circumferentially on the spline shaft, and a guide groove is opened circumferentially on the inner wall of the anti-rebound wheel housing accordingly, the leaf spring is installed at the bottom of the mounting groove, and a square key is placed on it, and the square key is clamped in the guide groove.

[0014] In a preferred embodiment of the present invention, the elastic locking members are evenly distributed in two groups along the circumference of the spline shaft.

[0015] In a preferred embodiment of the present invention, the special-shaped structure of the anti-rebound wheel housing is configured as a plurality of petal-shaped protrusions evenly arranged in an annular direction, and the inner wall of the cover plate has the same shape as the outer wall of the anti-rebound wheel housing, with a gap therebetween.

[0016] In a preferred embodiment of the present invention, a plurality of ribs with equal heights are provided on the outer end surface of the cover plate, and the ribs are arranged at a certain inclined angle along the axial direction of the cover plate.

[0017] In a preferred embodiment of the utility model, the base is configured as a welded part of the seat body and the transmission shaft, a connecting hole of the transmission shaft is opened at one end of the spline shaft, the transmission shaft extends into the connecting hole, and is connected through a relatively rotating part.

[0018] In a preferred embodiment of the utility model, the relatively rotating parts include steel balls and bearings, which are respectively arranged at both ends of the transmission shaft. Inner annular grooves are opened on the base and the spline shaft. The steel balls are arranged in the inner annular grooves and fixed by top screws and rings.

[0019] In a preferred embodiment of the utility model, the spring fastening bolt includes a bolt, a spring, a limiting washer and a nut. The bolt is passed through the friction plate, the middle clamping plate and the cover plate to sleeve the spring, and is locked by a limiting washer and a nut.

[0020] Beneficial effects: The utility model is a cooling overload protection device with anti-reverse wind. When the equipment needs to cut off the power and stop working, the elastic locking piece installed through the installation groove on the outer surface of the spline shaft slides with the guide groove in the anti-reverse wheel housing to cut off the power; when the equipment encounters a power speed direction inconsistent with the equipment, it can ensure that the equipment is not input to ensure that the equipment is not damaged, thereby protecting the operating equipment;

[0021] When the equipment is working intermittently or the short-term continuous torque exceeds the rated torque of the protection device, the friction plate assembly joint surface will generate sliding friction and heat. Due to the increase in the heat dissipation area of ​​the outer surface of the cover plate and the multiple rib plate structure, the heat generated by the friction of the friction plate can be naturally dissipated and cooled by air, with obvious heat dissipation effect, which greatly improves the service life of the friction plate;

[0022] The utility model realizes the anti-reversal and overload protection for agricultural machinery when encountering sudden situations, and the protection device operates stably and has high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A half-section view of a cooling overload protection device with anti-reverse wind provided by the utility model;

[0024] Figure 2 This is a cross-sectional view of the installation of the spline shaft and the anti-rebound wheel housing of the utility model;

[0025] Figure 3 For the utility model Figure 1 A local enlarged view of point A;

[0026] Figure 4 This is a schematic structural diagram of the anti-rebound wheel housing of the utility model;

[0027] Figure 5 A right view of a cooling overload protection device with anti-reverse wind provided by the utility model;

[0028] Figure 6 It is a structural schematic diagram of the spline shaft of the utility model;

[0029] Figure 7 A half-section view of the base of the utility model;

[0030] Figure 8 The utility model provides a left view of a cooling overload protection device with anti-reverse wind.

[0031] In the figure: 1 base, 11 seat body, 12 transmission shaft;

[0032] 2 spline shaft, 21 mounting groove, 22 connecting hole;

[0033] 3 anti-reverse wheel housing, 31 guide groove, 32 petal-shaped protrusion;

[0034] 4 elastic locking member, 41 square key, 42 leaf spring;

[0035] 5 friction plate;

[0036] 6. Middle splint;

[0037] 7 cover plate;

[0038] 8 Spring fastening bolts;

[0039] 9 relatively rotating parts, 91 steel balls, 92 bearings, 93 top screws, 94 rings. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0041] like Figure 1 As shown, a device with anti-reverse wind cooling overload protection includes a base 1 and a spline shaft 2 rotatably mounted on the base 1;

[0042] A base 1 connected to a power input terminal of a driven device;

[0043] A spline shaft 2, which is connected to the power output end of the driving device;

[0044] The anti-rebound wheel housing 3 is sleeved on the spline shaft 2, and an elastic locking member 4 is installed between the spline shaft 2;

[0045] It also includes a friction plate 5 and an intermediate clamping plate 6. The intermediate clamping plate 6 is installed between the two friction plates 5. The intermediate clamping plate 6 extends outward and is fixedly connected to the base 1. A cover plate 7 is sleeved on the outer wall of the anti-rebound wheel housing 3. Two cover plates 7 are arranged opposite to each other and are respectively arranged on both sides of the friction plate 5.

[0046] Spring fastening bolts 8, which are used for fastening connection between the friction plate 5, the middle clamping plate 6 and the cover plate 7;

[0047] The outer wall of the anti-rebound wheel housing 3 and the inner wall of the cover plate 7 are arranged as special-shaped structures of the same shape, and plug-in is achieved through the special-shaped structures, and effective transmission is performed.

[0048] When power is transmitted to the spline shaft 2, it is transmitted to the anti-rebound wheel housing 3 through the elastic locking piece 4, and then transmitted to the cover plate 7 through the special-shaped structure on the outer surface of the anti-rebound wheel housing 3, and then transmitted to the middle plate 6 through the friction plate 5, and finally transmitted to the base 1 through the middle plate 6, thereby driving the equipment to work.

[0049] Based on the above embodiments, Figure 2-3 As shown, the elastic locking member 4 includes a square key 41 and a leaf spring 42. A mounting groove 21 for the square key 41 is circumferentially opened on the spline shaft 2, and a guide groove 31 is correspondingly circumferentially opened on the inner wall of the anti-rebound wheel housing 3. The leaf spring 42 is installed at the bottom of the mounting groove 21, and the square key 41 is placed thereon. The square key 41 is clamped in the guide groove 31.

[0050] Anti-reverse function:

[0051] When the equipment needs to cut off the power and stop working, due to the inertia of the power transmission of the equipment, the elastic locking member 4 installed in the installation groove 21 on the outer surface of the spline shaft 2 slides with the guide groove 31 in the anti-rebound wheel housing 3 to cut off the power and avoid damage to the equipment;

[0052] Specifically, the counterclockwise rotation facing the spline shaft 2 is the working state, and the clockwise rotation is the disengagement state. Figure 2 As shown, the leaf spring 42 is installed at the bottom of the installation groove 21, and the leaf spring 42 is used to push the square key 41 upward to clamp the anti-rebound wheel housing 3. After the anti-rebound wheel housing 3 is clamped, the base 1 can be driven to rotate; in the opposite direction, the square key 41 slips in the anti-rebound wheel housing 3 under the action of the leaf spring 42, thereby driving the base 1 to stop power transmission.

[0053] On the basis of the above embodiment, the elastic locking members 4 are evenly distributed in two groups along the circumference of the spline shaft 2 .

[0054] Based on the above embodiments, Figure 4 As shown, the special-shaped structure of the anti-rebound wheel housing 3 is configured as a plurality of petal-shaped protrusions 32 evenly arranged in an annular direction, and the inner wall of the cover plate 7 has the same shape as the outer wall of the anti-rebound wheel housing 3, with a gap therebetween.

[0055] Based on the above embodiments, Figure 5 As shown, a plurality of ribs 71 of equal height are provided on the outer end surface of the cover plate 7. The ribs 71 are arranged at a certain inclined angle along the axial direction of the cover plate 7 to increase the heat dissipation area of ​​the cover plate 7 and improve the heat dissipation effect.

[0056] When the equipment is working intermittently or the short-term continuous torque exceeds the rated torque of the protection device, the joint surface of the friction plate 5, the middle clamping plate 6 and the cover plate 7 will produce sliding friction and generate heat. If the temperature generated by the friction is too high, it will affect the service life and working performance of the friction plate 5, and may easily cause mechanical failure. Since the outer end surfaces of the two cover plates 7 adopt a plurality of rib plates 71 structure, the heat dissipation area of ​​the outer surface of the cover plate 7 is increased, and the heat generated by the friction of the friction plate 5 is naturally dissipated and cooled by wind. The heat dissipation effect is obvious, which greatly improves the service life of the friction plate 5.

[0057] Based on the above embodiments, Figure 6-7 As shown, the base 1 is configured as a welded part of the base body 11 and the transmission shaft 12 , and a connecting hole 22 for the transmission shaft 12 is opened at one end of the spline shaft 2 , and the transmission shaft 12 extends into the connecting hole 22 and is connected through a relatively rotating member 9 .

[0058] On the basis of the above embodiments, Figure 3As shown, the relatively rotating member 9 includes a steel ball 91 and a bearing 92, which are respectively arranged at both ends of the transmission shaft 12. An inner annular groove is provided on the base 1 and the spline shaft 2. The steel ball 91 is arranged in the inner annular groove and fixed by a top screw 93 and a circular ring 94, forming a double support connection of the steel ball group and the bearing of the spline shaft 2.

[0059] On the basis of the above embodiment, the spring fastening bolt 8 includes a bolt, a spring, a limiting washer and a nut. The bolt is passed through the friction plate 5, the middle clamping plate 6 and the cover plate 7 to sleeve the spring, and is locked by a limiting washer and a nut.

[0060] In summary:

[0061] like Figure 8 As shown, the driven equipment is connected through the base 1, and the power transmission path is: when the power is transmitted to the spline shaft, it is transmitted to the anti-rebound wheel housing through the elastic locking member, and then transmitted to the friction plate assembly (friction plate, middle clamping plate and cover plate) through the six petal-shaped protrusions on the outer surface of the anti-rebound wheel housing, and finally transmitted to the base through the middle clamping plate, thereby driving the equipment to work.

[0062] Anti-reverse function: When the equipment needs to cut off power and stop working, due to the inertia of the equipment's power transmission, the elastic locking piece installed through the mounting groove on the outer surface of the spline shaft slides with the guide groove in the anti-reverse wheel housing to cut off the power; when the equipment encounters a power speed direction that is inconsistent with the equipment's matching power speed, it can ensure that the equipment is not input to ensure that the equipment is not damaged.

[0063] Air cooling function: When the equipment is working intermittently or the short-term continuous torque exceeds the rated torque of the protection device, the joint surface of the friction plate assembly will generate sliding friction and generate heat. Due to the increase in the heat dissipation area of ​​the outer surface of the cover plate and the multiple rib plate structure, the heat generated by the friction of the friction plate can be naturally dissipated and cooled by air, with obvious heat dissipation effect, which greatly improves the service life of the friction plate.

[0064] The above shows and describes the basic principle, main features and advantages of the utility model. The front, back, left and right used in the text are not specific, mainly for a more intuitive description of the technical solution, and do not have a limiting effect. The technical personnel in this industry should understand that the above implementation is only to illustrate the technical concept and characteristics of the utility model, and its purpose is to enable people familiar with this technology to understand the content of the utility model and implement it, and it cannot be used to limit the protection scope of the utility model. All equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A cooling overload protection device with anti-reverse wind, characterized in that: It comprises a base (1) and a spline shaft (2) rotatably mounted on the base (1); A base (1) connected to a power input terminal of a driven device; A spline shaft (2) connected to a power output end of a driving device; An anti-rebound wheel housing (3) which is sleeved on the spline shaft (2) and has an elastic locking member (4) installed between the housing and the spline shaft (2); It also includes a friction plate (5) and an intermediate clamping plate (6), wherein the intermediate clamping plate (6) is installed between two friction plates (5), the intermediate clamping plate (6) extends outward and is fixedly connected to the base (1), and a cover plate (7) is sleeved on the outer wall of the anti-rebound wheel housing (3), and two cover plates (7) are arranged opposite to each other and are respectively arranged on both sides of the friction plate (5); A spring fastening bolt (8) used for fastening the friction plate (5), the middle clamping plate (6) and the cover plate (7); The outer wall of the anti-rebound wheel housing (3) and the inner wall of the cover plate (7) are arranged as special-shaped structures of the same shape, and the special-shaped structure of the anti-rebound wheel housing (3) is arranged as a plurality of petal-shaped protrusions (32) evenly arranged in an annular direction.

2. The cooling overload protection device with anti-reverse wind according to claim 1 is characterized in that: The elastic locking member (4) comprises a square key (41) and a leaf spring (42); a mounting groove (21) for the square key (41) is opened in the circumferential direction of the spline shaft (2); a guide groove (31) is correspondingly opened in the circumferential direction of the inner wall of the anti-rebound wheel housing (3); the leaf spring (42) is installed at the bottom of the mounting groove (21), and the square key (41) is placed thereon; the square key (41) is clamped in the guide groove (31).

3. The cooling overload protection device with anti-reverse wind according to claim 1 is characterized in that: The elastic locking members (4) are evenly distributed in two groups along the circumference of the spline shaft (2).

4. The cooling overload protection device with anti-reverse wind according to claim 1 is characterized in that: The inner wall of the cover plate (7) and the outer wall of the anti-rebound wheel housing (3) have the same shape, and there is a gap between them.

5. The cooling overload protection device with anti-reverse wind according to claim 1 is characterized in that: A plurality of ribs (71) of equal height are provided on the outer end surface of the cover plate (7), and the ribs (71) are arranged at a certain inclined angle along the axial direction of the cover plate (7).

6. The cooling overload protection device with anti-reverse wind according to claim 1 is characterized in that: The base (1) is configured as a welded part of a base body (11) and a transmission shaft (12); a connecting hole (22) for the transmission shaft (12) is formed at one end of the spline shaft (2); the transmission shaft (12) extends into the connecting hole (22) and is connected via a relatively rotating part (9).

7. The cooling overload protection device with anti-reverse wind according to claim 1 is characterized in that: The spring fastening bolt (8) comprises a bolt, a spring, a limiting washer and a nut. The bolt is inserted through the friction plate (5), the middle clamping plate (6) and the cover plate (7) to sleeve the spring and is locked by a limiting washer and a nut.

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