Torque limiter with overload release protection function

Abstract

The utility model discloses a torque limiter with an overload release protection function. The torque limiter with the overload disengagement protection function comprises a hub used for being connected with a first transmission piece; the connecting fluted disc assembly comprises a connecting fluted disc body, connecting fluted disc grooves are formed in the connecting fluted disc body, and a tooth peak is formed between every two connecting fluted disc grooves; the pressure plate assembly comprises a pressure plate body and a steel ball, the pressure plate body is provided with a pressure plate groove and a limiting groove for separation, and in a normal working state, the steel ball is partially arranged in the pressure plate groove and partially arranged in the connecting fluted disc groove; the mandrel assembly is in transmission connection with the pressure plate assembly, and the mandrel assembly is used for being connected with a second transmission part; and the limiting device comprises a limiting device body and a connecting frame, and the connecting frame is installed on the mandrel assembly.

Description

TECHNICAL FIELD

[0001] The utility model relates to torque limiter technical field especially relates to a torque limiter with overload disengagement protection function. BACKGROUND

[0002] Torque limiter, also known as overload clutch, is a kind of mechanical power overload protection device. It is commonly used to be installed between the driving side and the load side of power transmission, so that the two sides rotate and transmit torque together. Once overload occurs, and the transmitted torque exceeds the set value, the torque limiter will separate or slip the transmission in an instant, thereby separating the driving side and the driven side of power transmission, and protecting the mechanical equipment from damage caused by overload.

[0003] The traditional friction type torque limiter generally uses friction plate to limit torque under the action of friction. However, the friction plate has a short service life, and needs to be replaced after 2-3 times of overload. The frequent replacement of the product wear parts adversely affects the production efficiency of the production unit and increases the labor intensity of the workers. Therefore, the torque limiter with overload disengagement protection function is provided by the technical personnel in the field to solve the problems in the background technology. SUMMARY

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0005] The torque limiter with overload disengagement protection function comprises:

[0006] A hub is used to connect a first transmission member;

[0007] A connecting tooth disc assembly is connected to the hub, and comprises a connecting tooth disc body, which is provided with a plurality of continuous connecting tooth disc grooves on one surface. Each two connecting tooth disc grooves form a tooth peak.

[0008] A pressure disc assembly comprises a pressure disc body and a steel ball. The pressure disc body is provided with a pressure disc groove and a disengagement limiting groove. In normal working condition, the steel ball is partially arranged in the pressure disc groove and the connecting tooth disc groove.

[0009] A mandrel assembly is drivingly connected to the pressure disc assembly, and is used to connect a second transmission member.

[0010] A limiting device comprises a limiting device body and a connecting frame, which is mounted on the mandrel assembly. Wherein,

[0011] When the torque limiter is overloaded, the steel ball moves from the connecting tooth disc groove to the tooth peak, thereby pushing the pressure plate assembly to move away from the connecting tooth disc assembly, and the limiting device body enters the disengagement limiting groove from the initial position, thereby preventing the pressure plate assembly from moving towards the tooth disc assembly under external force.

[0012] Optionally, the connecting tooth disc assembly comprises:

[0013] A connecting tooth disc body, wherein a connecting tooth disc hole is arranged on the connecting tooth disc body, and the mandrel assembly partially extends into the connecting tooth disc hole;

[0014] A connecting assembly, wherein the connecting tooth disc body is connected with the hub through the connecting assembly;

[0015] A bearing assembly, wherein the bearing assembly is arranged between the connecting tooth disc body and the mandrel assembly.

[0016] Optionally, a pressure plate hole is arranged on the pressure plate body;

[0017] The mandrel assembly passes through the pressure plate hole, and the mandrel assembly can drive the pressure plate body to rotate.

[0018] Optionally, the pressure plate assembly further comprises a copper block and a fixing plate;

[0019] The pressure plate body and the mandrel assembly have a containing cavity, the copper block is arranged in the containing cavity, and the containing cavity has a gap for the pressure plate body to move on the mandrel assembly;

[0020] The fixing plate is used to close the containing cavity.

[0021] Optionally, a connecting frame mounting hole is arranged on the connecting frame;

[0022] The limiting device body comprises:

[0023] A bolt assembly, wherein the bolt assembly passes through the connecting frame mounting hole, and one end of the bolt assembly is provided with a first platform;

[0024] A spring, wherein the spring is mounted on the bolt assembly, one end of the spring is in contact with the connecting frame, and the other end of the spring is in contact with the first platform; and

[0025] When the torque limiter is overloaded, the end of the bolt assembly provided with the first platform enters the disengagement limiting groove.

[0026] Optionally, the number of pressure plate grooves of the pressure plate body is plural, and each pressure plate groove is uniformly distributed along the axial direction of the pressure plate body.

[0027] The number of the steel balls is the same as the number of the pressing disc grooves, and one steel ball is partially accommodated in one pressing disc groove.

[0028] Optionally, the mandrel assembly comprises:

[0029] A mandrel, which passes through the connecting tooth disc hole of the connecting tooth disc body and the pressing disc hole;

[0030] A bushing, which is connected with the mandrel, and is used for connecting with the second transmission member.

[0031] Optionally, the pressing disc assembly further comprises a pressing screw and a pressing spring, the pressing screw is fixed on the connecting frame, one end of the pressing screw abuts against the pressing disc body, and the pressing spring is sleeved on the end of the pressing screw abutting against the pressing disc body.

[0032] The utility model has the following beneficial effects:

[0033] The torque limiter with overload disengagement protection function has the following advantages: when the torque limiter is overloaded, the steel ball moves from the connecting tooth disc groove to the tooth peak, thereby pushing the pressing disc assembly to move away from the connecting tooth disc assembly, and the limiting device body enters the disengagement limiting groove from the initial position, thereby preventing the pressing disc assembly from moving towards the tooth disc assembly under the action of external force, so that the torque limiter is prevented from being damaged by back movement after disengagement. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 The utility model provides a kind of structural diagram of torque limiter with overload disengagement protection function;

[0035] Figure 2 The utility model provides a kind of structural diagram of connecting tooth disc body;

[0036] Figure 3 The utility model provides a kind of structural diagram of pressing disc body;

[0037] Figure 4 The utility model provides a kind of structural diagram of limiting device body;

[0038] Figure 5 The utility model provides a kind of structural diagram of torque limiter with overload disengagement protection function;

[0039] Legend:

[0040] 1) hub, 2) connecting assembly, 3) connecting toothed disc body, 4) steel ball, 5) pressure plate body, 6) limiting device, 7) compression spring, 8) compression screw, 9) fixing plate, 10) connecting frame, 11) mandrel body, 12) bushing, 13) copper block, 14) bearing, 15) circlip, 61) limiting device body; 31) connecting toothed disc groove, 32) tooth peak, 51) pressure plate groove, 52) disengagement limiting groove. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0042] As shown in the torque limiter with overload disengagement protection function, comprising a hub 1, a connecting toothed disc assembly, a pressure plate assembly, a mandrel assembly and a limiting device, wherein, Figures 1 to 5

[0043] The hub 1 is used for connecting a first transmission member;

[0044] The hub 1 is connected with the connecting toothed disc assembly, and the connecting toothed disc assembly comprises a connecting toothed disc body 3, a plurality of continuous connecting toothed disc grooves 31 are arranged on one face of the connecting toothed disc body 3, and a tooth peak 32 is formed between every two connecting toothed disc grooves 31;

[0045] The pressure plate assembly comprises a pressure plate body 5 and a steel ball 4, the pressure plate body 5 is provided with a pressure plate groove 51 and a disengagement limiting groove 52, in a normal working state, the steel ball 4 is partially arranged in the pressure plate groove, and the steel ball 4 is partially arranged in the connecting toothed disc groove 31;

[0046] The mandrel assembly is drivingly connected with the pressure plate assembly, and the mandrel assembly is used for connecting a second transmission member;

[0047] The limiting device 6 comprises a limiting device body 61 and a connecting frame 62, and the connecting frame 62 is installed on the mandrel assembly; wherein,

[0048] When the torque limiter is overloaded, the steel ball moves from the connecting toothed disc groove to the tooth peak, thereby pushing the pressure plate assembly to move away from the connecting toothed disc assembly, and the limiting device body enters the disengagement limiting groove from the initial position, thereby preventing the pressure plate assembly from moving towards the toothed disc assembly under the action of external force.

[0049] Referring to Figure 1 and Figure 2 ​In the embodiment, the connecting tooth disc assembly comprises a connecting tooth disc body 3, a connecting assembly and a bearing assembly, wherein,

[0050] The connecting tooth disc body 3 is provided with a connecting tooth disc hole, and the mandrel assembly partially extends into the connecting tooth disc hole;

[0051] The connecting tooth disc body is connected with the hub through the connecting assembly;

[0052] The bearing assembly is arranged between the connecting tooth disc body and the mandrel assembly.

[0053] By arranging the bearing assembly, the relative rotation between the connecting tooth disc assembly and the mandrel can be realized.

[0054] In the embodiment, the bearing assembly comprises a bearing 14 and a circlip 15, and the circlip 15 is used to prevent the bearing 14 from axially moving.

[0055] In the embodiment, the pressing disc body 5 is provided with a pressing disc hole;

[0056] The mandrel assembly passes through the pressing disc hole, and the mandrel assembly can drive the pressing disc body 5 to rotate.

[0057] In the embodiment, the pressing disc assembly further comprises a copper block 13 and a fixing plate 9;

[0058] The pressing disc body and the mandrel assembly have a receiving cavity, the copper block 13 is arranged in the receiving cavity, and the receiving cavity has a gap for the pressing disc body to move on the mandrel assembly;

[0059] The fixing plate 9 is used to close the receiving cavity.

[0060] In the embodiment, the pressing disc body is partially made of steel, and the friction is large when the pressing disc body moves relative to the mandrel body 11. By arranging the copper block 13, the relative movement between the pressing disc body and the mandrel body can be facilitated. Specifically, copper is relatively soft, and the contact surface is not easy to scratch and scratch, which is more conducive to sliding.

[0061] In the embodiment, the fixing plate 9 is used to close the receiving cavity, so as to prevent the copper block from moving out of the receiving cavity.

[0062] In the embodiment, the connecting frame 62 is provided with a connecting frame mounting hole;

[0063] The limiting device body comprises:

[0064] A bolt assembly passes through the connecting frame mounting hole, and one end of the bolt assembly is provided with a first platform;

[0065] A spring is mounted on the bolt assembly, one end of the spring is in contact with the connecting frame, and the other end of the spring is in contact with the first platform.

[0066] When the torque limiter is overloaded, the bolt assembly is provided with an end of the first platform entering the disengagement limiting groove.

[0067] In the embodiment, the number of the pressing disc grooves of the pressing disc body 5 is multiple, and each pressing disc groove is uniformly distributed along the axial direction of the pressing disc body.

[0068] The number of the steel balls 4 is the same as the number of the pressing disc grooves, and one steel ball is partially contained in one pressing disc groove.

[0069] In the embodiment, the mandrel assembly includes a mandrel 11 and a bushing 12, the mandrel 11 passes through the connecting gear disc hole of the connecting gear disc body and the pressing disc hole, and the bushing 12 is connected with the mandrel 11 and is used to be connected with the second transmission member.

[0070] In the embodiment, the pressing disc assembly further includes a pressing screw 8 and a pressing spring 7, the pressing screw is fixed on the connecting frame, one end of the pressing screw abuts against the pressing disc body, and the pressing spring is sleeved on the end of the pressing screw abutting against the pressing disc body.

[0071] In use, one end of the pressing screw is fixed on the connecting frame, and the other end is guided to position the spring. When the torque limiter is normally working, the pressing screw and the pressing spring press the pressing disc body and the steel ball on the connecting gear disc assembly. When overloaded, the steel ball pushes the pressing disc body to the right to the limiting position. After the overload fault is eliminated, the limiting device is opened, the pressing screw and the pressing spring press the pressing disc body and the steel ball on the connecting gear disc assembly, and the torque limiter returns to normal work.

[0072] The following will be described in detail in combination with the accompanying drawings Figures 1 to 5 A principle of the present application is described in detail, and it can be understood that the example does not constitute any limitation on the present application.

[0073] The torque limiter with overload disengagement protection function of the present application connects one side of the hub connection transmission system (i.e. the first transmission member) through the mandrel body and the bushing under the cooperation of the screw, and connects the other side of the transmission system (the second transmission member). The mandrel body is matched with the pressing disc through the square shaft part on the structure of the mandrel body, and under the action of the connecting frame, the pressing screw, the pressing spring, the steel ball and the like, the power and the torque are transmitted to the hub side through the connecting gear disc body and the connecting assembly.

[0074] The steel ball is embedded in the corresponding hemispherical groove (pressing disc groove) on the pressing disc body, and the part of the connecting gear disc body matched with the steel ball for transmitting torque is the connecting gear disc groove uniformly distributed in the circumferential direction.

[0075] When the torque limiter is working normally, the steel ball is embedded in the semispherical groove of the pressing disc body on one side, and is in the connecting tooth disc groove between the tooth peaks and the tooth peak middle of the connecting tooth disc body on the other side, and the torque transmission is realized under the action of the pressing spring, the pressing screw and the connecting frame.

[0076] When the system is overloaded, the teeth of the connecting tooth disc body will push the steel ball and the pressing disc away along the axial direction (to the right in the figure), and the limiting device will be clamped in the disengaging limiting groove on the outer surface of the pressing disc body under the action of the spring in the limiting device, at this time, the connecting tooth disc body, the steel ball and the pressing disc body will be disengaged, and the power and the torque cannot be transmitted any more, so that the effect of cutting off the torque transmission is achieved.

[0077] After the fault is eliminated, the limiting device is pulled up, and the pressing disc body will press the steel ball in the tooth gap of the connecting tooth disc body under the action of the pressing screw and the pressing spring, so that the torque can be transmitted continuously, and the torque limiter returns to normal work.

[0078] Finally, it should be pointed out that the above description is only the preferred specific embodiments of the utility model, and is not used to limit the utility model, although the utility model is described in detail with reference to the foregoing specific embodiments, for the person skilled in the art, the technical scheme recorded in the foregoing specific embodiments can still be modified, or part of the technical features can be replaced, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A torque limiter having an overload trip function, characterized by The torque limiter with overload trip protection function comprises: a hub (1) for connecting a first transmission member; a connecting gear plate assembly connected with the hub (1), the connecting gear plate assembly comprising a connecting gear plate body (3) provided with a plurality of continuous connecting gear plate grooves on one surface, and a tooth peak (32) formed between every two connecting gear plate grooves (31); a pressure plate assembly comprising a pressure plate body (5) provided with a pressure plate groove (51) and a trip limiting groove (52), and a steel ball (4) partially arranged in the pressure plate groove and the connecting gear plate groove (31) under normal working condition; a mandrel assembly in transmission connection with the pressure plate assembly, the mandrel assembly for connecting a second transmission member; a limiting device (6) comprising a limiting device body (61) and a connecting frame (62) mounted on the mandrel assembly; wherein, when the torque limiter is overloaded, the steel ball moves from the connecting gear plate groove (31) to the tooth peak (32), thereby pushing the pressure plate assembly to move away from the connecting gear plate assembly, and the limiting device body enters the trip limiting groove from the initial position, thereby preventing the pressure plate assembly from moving towards the connecting gear plate assembly under external force.

2. The torque limiter with overload trip function according to claim 1, characterized in that The connecting gear plate assembly comprises: a connecting gear plate body (3) provided with a connecting gear plate hole, and the mandrel assembly partially extends into the connecting gear plate hole; a connecting assembly for connecting the connecting gear plate body with the hub; a bearing assembly arranged between the connecting gear plate body and the mandrel assembly.

3. The torque limiter with overload trip function according to claim 2, characterized in that: The pressure plate body (5) is provided with a pressure plate hole; the mandrel assembly passes through the pressure plate hole, and the mandrel assembly can drive the pressure plate body (5) to rotate.

4. The torque limiter with overload trip function according to claim 3, characterized in that: The pressure plate assembly further comprises a copper block (13) and a fixing plate (9); the pressure plate body and the mandrel assembly have a receiving cavity, the copper block (13) is arranged in the receiving cavity, and the receiving cavity has a gap for the pressure plate body to move on the mandrel assembly; the fixing plate (9) is used to close the receiving cavity.

5. The torque limiter with overload trip function according to claim 4, characterized in that The connecting frame (62) is provided with a connecting frame mounting hole; The limiting device body comprises: a bolt assembly passing through the connecting frame mounting hole, one end of the bolt assembly being provided with a first platform; a spring mounted on the bolt assembly, one end of the spring being in contact with the connecting frame, and the other end of the spring being in contact with the first platform; wherein, when the torque limiter is overloaded, one end of the bolt assembly provided with the first platform enters the trip limiting groove.

6. The torque limiter with overload trip function according to claim 5, wherein The number of pressure plate grooves of the pressure plate body (5) is multiple, and each pressure plate groove is uniformly distributed along the axial direction of the pressure plate body. The number of the steel balls (4) is the same as the number of the pressing disc grooves, and one steel ball is partially accommodated in one pressing disc groove.

7. The torque limiter with overload trip function according to claim 2, wherein The mandrel assembly comprises: a mandrel (11) passing through the connecting tooth disc hole of the connecting tooth disc body and the pressing disc hole; a bushing (12) connected with the mandrel (11), the bushing (12) being used for connecting with a second transmission member.

8. The torque limiter with overload trip function according to claim 7, characterized in that The pressing disc assembly further comprises a pressing screw (8) and a pressing spring (7), the pressing screw being fixed on the connecting frame, one end of the pressing screw abutting against the pressing disc body, and the pressing spring being sleeved on the end of the pressing screw abutting against the pressing disc body.

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