Friction plate type limit torque coupling with supporting protection function

Abstract

The utility model discloses a friction plate type limit torque coupling with a supporting protection function. The friction plate type limit torque coupling with the supporting protection function comprises a first half coupling, a transmission wheel, a second half coupling and a brake wheel, an inner hole of the transmission wheel is connected with a gear shaft through a spline, and an outer ring of the transmission wheel is connected with a driven friction plate through straight teeth; the brake wheel is connected with the first half coupling through a pin, the brake wheel is connected with the second half coupling through a connecting bolt, a thrust bearing is arranged between the brake wheel and the transmission wheel, and a gap is formed between a first brake wheel abrasion area below the middle of the brake wheel and the gear shaft; a gap is formed between a second brake wheel abrasion area below the end part of the brake wheel and the transmission wheel; the problems of sinking, abrasion and the like of the brake wheel cannot occur in use, the original technical performance of the brake wheel can be maintained to the maximum extent, the possible problems of starting difficulty, rotary brake failure and the like can be avoided, the operation safety of equipment is ensured, and economic loss caused by equipment shutdown is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of limit torque couplings, in particular to a friction plate type limit torque coupling with support protection. Background Art

[0002] The limit torque coupling is a must-have component for gantry cranes. Currently, the mainstream type is the friction plate limit torque coupling. Its function is that when the transmitted torque value exceeds the limit value, the friction plates slip to interrupt the transmission, thereby protecting the motor, metal structure and transmission components from damage, and avoiding affecting the working condition and life of the entire machine.

[0003] TMJ type limit torque coupling belongs to the friction plate limit torque coupling. Its main structural parts are as follows: Figure 1 As shown, it includes the first half coupling 1, adjusting bolt 2, spring 3, transmission wheel 4, second half coupling 5, connecting bolt 6, pin 7, brake wheel 8, oil filling hole 9, upper friction plate 10, active friction plate 11, and driven friction plate 12. The first half coupling is driven by an electric motor; the adjusting bolt can adjust the limit torque within a certain range by adjusting the pressing force of the spring; the spring is used to compress the active and driven friction plates; the inner hole of the transmission wheel is connected to the gear shaft through a spline, and the outer ring is connected to the driven friction plate through a spur gear; the rotating brake wheel is connected to the first half coupling through a pin and connected to the second half coupling through a connecting bolt. The brake wheel is usually made of cast steel. Before using the limit torque coupling, after the adjusting bolt is fixed according to the limit torque requirement, the pressure of the spring on the friction plate remains unchanged. At this time, the friction force formed between the friction plates is the limit torque of the coupling.

[0004] When the slewing mechanism is working normally, the working torque is less than the limit torque value, and the brake wheel and the second half coupling transmit torque through the friction force generated between the friction plates. There is no relative sliding between the upper friction plate and the driven friction plate, and the equipment operates normally; when the slewing mechanism is started or braked suddenly or accidentally hits an obstacle, the external torque suddenly increases, and the working torque exceeds the limit torque, the friction plate and the driven friction plate will slip, causing the driving shaft and the driven shaft to disengage, avoiding damage to the transmission system; when the overload is eliminated, the limit torque coupling automatically returns to normal, and the equipment continues to operate normally. This is the protective function of the limit torque coupling.

[0005] However, since the first half coupling is fixed to the motor output shaft by a nut and connected to the brake wheel by a pin, it cannot withstand axial force. Although the transmission wheel falls on the step at the bottom of the gear shaft, the transmission wheel and the driven friction plate are connected by straight teeth and cannot withstand axial force. The combination of the brake wheel and the second half coupling and other components will inevitably fall due to their own weight after assembly. The center of the brake wheel will first contact the gear shaft. After being worn to a certain depth, the transmission wheel will also contact the brake wheel, resulting in the phenomenon of sinking and internal wear of the brake wheel. There are two obvious wear areas on the inner side of the brake wheel. Utility Model Content

[0006] The utility model aims to provide a friction plate limit torque coupling with support protection, so as to solve the problem that the existing friction plate limit torque coupling will have the phenomenon of damage and sinking of the brake wheel after a period of use, and the friction torque will be reduced after sinking, which will cause difficulty in starting and braking the equipment.

[0007] The utility model provides a friction plate type limit torque coupling with support protection, comprising: a first half coupling, a transmission wheel, a second half coupling and a brake wheel, the inner hole of the transmission wheel is connected to the gear shaft through a spline, and the outer ring of the transmission wheel is connected to the driven friction plate through a spur tooth; the brake wheel is connected to the first half coupling through a pin, and the brake wheel is connected to the second half coupling through a connecting bolt, a thrust bearing is arranged between the brake wheel and the transmission wheel, a gap is provided between the first brake wheel wear zone below the middle part of the brake wheel and the gear shaft; a gap is provided between the second brake wheel wear zone below the end of the brake wheel and the transmission wheel.

[0008] Furthermore, the inner ring of the thrust bearing is sleeved on the transmission wheel hub, and the seat ring of the thrust bearing is horizontally placed on the transmission wheel web.

[0009] Furthermore, the thrust bearing is stationary when the friction plate type torque limiting coupling works normally, and when the friction plate type torque limiting coupling slips, the thrust bearing rotates with the transmission wheel.

[0010] Furthermore, a thrust bearing cover is arranged between the thrust bearing and the brake wheel, the thrust bearing cover is placed flat on the thrust bearing, a hole is arranged in the middle of the thrust bearing cover, and the gear shaft where the transmission wheel is located is located inside the hole.

[0011] The utility model has the following beneficial effects: the utility model is a friction plate type limit torque coupling with support protection, which will not cause problems such as brake wheel sinking and wear during use, can maintain its original technical performance to the maximum extent, and can avoid possible problems such as starting difficulties and rotation brake failure, thereby ensuring the safe operation of the equipment and avoiding economic losses caused by equipment shutdown. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0013] Figure 1 This is the structural diagram of the existing TMJ type limit torque coupling;

[0014] Figure 2 The utility model provides a structural diagram of a friction plate type limit torque coupling with support protection. DETAILED DESCRIPTION

[0015] It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. It should be noted that the following detailed descriptions are all illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those of ordinary skill in the art to which the present application belongs.

[0016] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0017] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in a variety of different forms and should not be interpreted as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. In the accompanying drawings, for clarity, the thickness of the layers and regions is enlarged, and the same reference numerals are used to represent the same devices, so their description will be omitted.

[0018] See also Figure 1 and Figure 2 A friction plate limit torque coupling with support protection according to an embodiment of the utility model comprises: a first half coupling 1, a transmission wheel 4, a second half coupling 5 and a brake wheel 8, the inner hole of the transmission wheel 4 is connected to the gear shaft 41 through a spline, and the outer ring of the transmission wheel 4 is connected to the driven friction plate 12 through a spur gear; the brake wheel 8 is connected to the first half coupling 1 through a pin 7, and the brake wheel 8 is connected to the second half coupling 5 through a connecting bolt 6. The main structure of the friction plate limit torque coupling with support protection can adopt the structure of the existing TMJ type limit torque coupling. The difference from the existing TMJ type limit torque coupling is that a thrust bearing 200 is arranged between the brake wheel 8 and the transmission wheel 4.

[0019] Specifically, the inner ring of the thrust bearing 200 is sleeved on the hub of the transmission wheel 4, and the seat ring of the thrust bearing 200 is horizontally placed on the web of the transmission wheel 4. There is a gap between the first brake wheel wear area 300 below the middle of the brake wheel 8 and the gear shaft 41; there is a gap between the second brake wheel wear area 400 below the end of the brake wheel 8 and the transmission wheel 4.

[0020] The thrust bearing 200 supports the brake wheel 8. After adding the thrust bearing 200, the previous contact parts will no longer contact. When the coupling works normally, the thrust bearing 200 is stationary. When the TMJ type limit torque coupling slips, the thrust bearing 200 rotates with the brake wheel 8. This solution is simple and feasible to implement, has good effects and high cost performance, and is a relatively ideal improvement solution.

[0021] In addition, a thrust bearing pressure cover 100 is provided between the thrust bearing 200 and the brake wheel 8. The thrust bearing pressure cover 100 is placed flat on the thrust bearing 200. A hole is provided in the middle of the thrust bearing pressure cover 100. The gear shaft 41 where the transmission wheel 4 is located is located inside the hole to prevent the thrust bearing pressure cover 100 from contacting the gear shaft 41. The thrust bearing pressure cover 100 is mainly used to stabilize the thrust bearing 200.

[0022] It can be seen from the above embodiments that the utility model provides a friction plate limit torque coupling with support protection, wherein a thrust bearing is arranged between the brake wheel and the transmission wheel, and a gap is provided between the first brake wheel wear zone below the middle part of the brake wheel and the gear shaft; a gap is provided between the second brake wheel wear zone below the end of the brake wheel and the transmission wheel, and problems such as sinking and wear of the brake wheel will not occur during use, and its original technical performance can be maintained to the maximum extent, and problems such as possible starting difficulties and rotation brake failure can be avoided, thereby ensuring the safe operation of the equipment and avoiding economic losses caused by equipment shutdown.

[0023] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0024] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example.

[0025] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A friction plate type limit torque coupling with support protection, include: A first half coupling (1), a transmission wheel (4), a second half coupling (5) and a brake wheel (8), wherein the inner hole of the transmission wheel (4) is connected to the gear shaft (41) through a spline, and the outer ring of the transmission wheel (4) is connected to the driven friction plate (12) through a straight tooth; the brake wheel (8) is connected to the first half coupling (1) through a pin (7), and the brake wheel (8) is connected to the second half coupling (5) through a connecting bolt (6), characterized in that a thrust bearing (200) is provided between the brake wheel (8) and the transmission wheel (4), a first brake wheel wear area (300) below the middle of the brake wheel (8) and the gear shaft (41) have a gap; and a second brake wheel wear area (400) below the end of the brake wheel (8) and the transmission wheel (4) have a gap.

2. A friction plate type torque limiting coupling with support protection as claimed in claim 1, It is characterized in that The inner ring of the thrust bearing (200) is sleeved on the hub of the transmission wheel (4), and the seat ring of the thrust bearing (200) is horizontally placed on the web of the transmission wheel (4).

3. A friction plate type torque limiting coupling with support protection as claimed in claim 1, It is characterized in that The thrust bearing (200) is stationary when the friction plate type torque limiting coupling operates normally, and when the friction plate type torque limiting coupling slips, the thrust bearing (200) rotates with the driving wheel (4).

4. A friction plate type torque limiting coupling with support protection as claimed in claim 1, It is characterized in that A thrust bearing cover (100) is arranged between the thrust bearing (200) and the brake wheel (8); the thrust bearing cover (100) is placed flat on the thrust bearing (200); a hole is arranged in the middle of the thrust bearing cover (100); and the gear shaft (41) where the transmission wheel (4) is located is located inside the hole.

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