Precise and adjustable torque limiter

Abstract

The utility model discloses a precise and adjustable torque limiter which comprises a bottom plate, an input shaft, an output shaft and a shaft sleeve, wherein the input shaft and the output shaft are coaxially installed on the top of the bottom plate, and the shaft sleeve is connected to the opposite ends of the input shaft and the output shaft in a sleeved mode. An arc-shaped structure is arranged at the end, facing the input shaft, of the shaft sleeve, a convex clamping groove is formed in the side face, close to the other end, of the shaft sleeve, and clamping columns are fixed to the side face of the input shaft and the side face of the output shaft correspondingly; through cooperation of a fixed piece, a first movable piece, a second movable piece, a reset spring and an adjusting bolt, the acting force of the reset spring abutting against the shaft sleeve can be changed, the friction force of abutting between a clamping column on the side face of the input shaft and an arc-shaped structure is adjusted, dynamic adjustment of spring force is achieved through simple and accurate operation, and the practicability is high. Therefore, a trigger point of torque overload limitation is flexibly adjusted to adapt to changes of different working environments and load conditions, and the application range and the flexibility of the torque limiter are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to torque transmission technical field especially relates to a precision adjustable torque limiter. BACKGROUND

[0002] Torque limiter main function is overload protection, also called limit torque, safety coupling or safety clutch, it is a kind of component when connecting prime mover and working machine, when the required torque exceeds the set value due to overload or mechanical failure, it limits the torque that transmission system transmits in the form of slip, and it restores connection when the overload situation disappears, so that mechanical damage is prevented, and expensive downtime losses are avoided.Torque limiter is mainly applied in printing equipment, battery industry, scrap conveyor, conveying production line, divider and other industries.

[0003] The utility model discloses a kind of torque limiters with limiting function, by setting the limiter body of torque limiter, first shaft connecting piece, second shaft connecting piece, bolt, adjusting column, connecting column, gear and limit rack, by the user to bolt is tightened, make second shaft connecting piece and first shaft connecting piece to the preliminary location of shaft, then the user rotates adjusting column, adjusting column drives connecting column to rotate, connecting column drives gear to rotate, rack drives limit rack to move, make limit rack be clamped into shaft, reach the advantage that better location is carried out to connecting shaft, solve the poor location of the existing torque limiter to connecting shaft, make connecting shaft and torque limiter between slip, to cause damage to connecting shaft Problem.

[0004] Although the device can better limit the connecting shaft, in actual use, the strength of torque limitation is often established by the type structure of the limiter body, so when the prime mover and working machine connected change, load fluctuates, it is difficult to flexibly adjust the strength of torque limitation in subsequent use, thereby limiting the application range and flexibility of torque limiter. SUMMARY

[0005] The utility model overcomes the insufficient prior art, provide a kind of precision adjustable torque limiter.

[0006] To achieve the above object, the utility model adopts the technical scheme as follows: a kind of precision adjustable torque limiter, comprising: bottom plate, coaxially installed input shaft and output shaft on the top of the bottom plate, and the shaft sleeve of the opposite end of the input shaft and the output shaft is sleeved;

[0007] The arc-shaped structure is arranged at one end of the shaft sleeve opposite to the input shaft, a convex clamping groove is arranged on the side surface close to the other end of the shaft sleeve, clamping columns are fixed on the side surfaces of the input shaft and the output shaft, the side surface of the clamping column on the input shaft is in abutment with one side of the arc-shaped structure, and the side surface of the clamping column on the output shaft is clamped with the inner side of the convex clamping groove.

[0008] The side surface of the output shaft is provided with an elastic mechanism, the elastic mechanism comprises a fixed sheet fixed on the side surface of the output shaft, a first movable sheet and a second movable sheet which are sequentially sleeved on the side surface of the output shaft, and a reset spring fixed between the first movable sheet and the second movable sheet; a plurality of adjusting bolts are rotationally connected to the fixed sheet, and the side surface of the adjusting bolt is threadedly connected with the inner side of the first movable sheet.

[0009] In a preferred embodiment of the utility model, the shaft sleeve, the fixed sheet, the first movable sheet, the second movable sheet, the input shaft and the output shaft are coaxially arranged, one side of the second movable sheet is in abutment with one end of the shaft sleeve, and the reset spring is sleeved on the side surface of the output shaft.

[0010] In a preferred embodiment of the utility model, one side of the second movable sheet is fixed with a plurality of guide rods, and the side surfaces of the guide rods are respectively sleeved with the inner sides of the first movable sheet and the fixed sheet.

[0011] In a preferred embodiment of the utility model, the side surface of one end of the guide rod close to the fixed sheet is provided with a scale table for measuring the moving distance of the first movable sheet to the second movable sheet.

[0012] In a preferred embodiment of the utility model, the arc-shaped structure comprises, from inside to outside, an abutment part, a sliding part and an overload part; the abutment part is used for the abutment of the side surface of the clamping column on the input shaft when power is transmitted, the sliding part is used for the abutment of the side surface of the clamping column on the input shaft when the torque is large, and the overload part is used for the abutment of the side surface of the clamping column on the input shaft when overload protection is performed.

[0013] In a preferred embodiment of the utility model, the convex clamping groove comprises a transmission groove and a clamping groove in communication with the transmission groove close to the arc-shaped structure; the transmission groove is used for the abutment of the side surface of the clamping column on the output shaft when power is transmitted, and the clamping groove is used for the abutment of the side surface of the clamping column on the output shaft when overload protection is performed.

[0014] In a preferred embodiment of the utility model, a plurality of bearing seats are arranged on the bottom plate, and the inner sides of the plurality of bearing seats are respectively fixed with the side surfaces of the input shaft and the output shaft.

[0015] The bottom of the bearing seat is provided with a plurality of mounting holes for connecting the bottom plate top by fasteners.

[0016] In a preferred embodiment of the utility model, the top of the bottom plate is provided with a protective frame for protecting the parts on the top of the bottom plate, and the side surface of the protective frame is fixed with a plurality of mounting blocks for connecting the top of the bottom plate by fasteners.

[0017] In a preferred embodiment of the utility model, the top of the bottom plate is fixed with a plurality of positioning blocks for connecting the working position by fasteners.

[0018] The utility model solves the defects in the background art, and has the following beneficial effects:

[0019] (1) the utility model provides a precise adjustable torque limiter, through setting up elastic mechanism in the side surface of output shaft, when according to the load change between driving machine and working machine, through the cooperation of fixed sheet, first movable sheet, second movable sheet, return spring and adjusting bolt, the force of return spring resisting sleeve can be changed, the friction force of the clamping column on the side of input shaft and the arc structure is adjusted, simple and accurate operation is realized, dynamic adjustment of spring force is realized, so that the trigger point of torque overload limit is flexibly adjusted, different working environment and load condition changes are adapted, and the application range and flexibility of torque limiter are improved.

[0020] (2) in the utility model, the guiding rod is fixed on one side of the second movable sheet, so that the stability of the first movable sheet and the second movable sheet during movement is ensured, inclination or deviation due to uneven stress is prevented, and the guiding rod is sleeved with the inner side of the first movable sheet and the fixed sheet, so that the overall stability of the elastic mechanism during stress is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0021] The utility model will be further described below in combination with the drawings and examples;

[0022] Figure 1 It is the perspective structural drawing of the preferred embodiment of the utility model;

[0023] Figure 2 It is the protective frame and bottom plate separation structure diagram of the preferred embodiment of the utility model;

[0024] Figure 3 It is the sleeve and input shaft and output shaft connection structure diagram of the preferred embodiment of the utility model;

[0025] In the figure: 1, bottom plate; 11, input shaft; 12, output shaft; 2, shaft sleeve; 21, arc structure; 211, abutting part; 212, sliding part; 213, overload part; 22, convex clamping groove; 221, transmission groove; 222, clamping groove; 23, clamping column; 3, fixed sheet; 31, first movable sheet; 32, second movable sheet; 33, return spring; 34, adjusting bolt; 4, guide rod; 5, scale; 6, bearing seat; 61, mounting hole; 7, protective frame; 71, mounting block; 8, positioning block. DETAILED DESCRIPTION

[0026] The utility model will be explained in further detail in combination with the drawings and embodiments, these drawings are all simplified schematic diagram, only with schematic way illustrates the basic structure of the utility model, therefore it only shows the related structure with the utility model.

[0027] As Figure 1 and Figure 2 shown, a precise adjustable torque limiter, comprising: bottom plate 1, coaxial installation at the top of input shaft 11 and output shaft 12 of bottom plate 1 and sleeve joint in the opposite end of input shaft 11 and output shaft 12's shaft sleeve 2;Shaft sleeve 2 opposite input shaft 11 one end is provided with arc structure 21, the side surface of shaft sleeve 2 near the other end is provided with convex clamping groove 22, the side surface of input shaft 11 and output shaft 12 is fixed with clamping column 23, the side surface of clamping column 23 on input shaft 11 is abutted with one side of arc structure 21, the side surface of clamping column 23 on output shaft 12 is clamped with the inside of convex clamping groove 22;The side surface of output shaft 12 is provided with elastic mechanism, and the elastic mechanism includes: fixed sheet 3 fixed in the side surface of output shaft 12, first movable sheet 31 and second movable sheet 32 are sequentially sleeved in the side surface of output shaft 12, and return spring 33 is fixed between first movable sheet 31 and second movable sheet 32;Fixed sheet 3 is rotatably connected with several adjusting bolts 34, and the side surface of adjusting bolt 34 is screw-connected with the inside of first movable sheet 31.

[0028] It should be noted that the shaft sleeve 2, the fixed sheet 3, the first movable sheet 31, the second movable sheet 32, the input shaft 11 and the output shaft 12 are coaxially arranged, one side of the second movable sheet 32 abuts against one end of the shaft sleeve 2, and the reset spring 33 is sleeved on the side surface of the output shaft 12; the driving machine and the working machine are connected with the input shaft 11 and the output shaft 12 respectively, before the driving machine is started, the shaft sleeve 2 is on the side surface of the input shaft 11 and the output shaft 12, and the clamping column 23 on the side surface of the input shaft 11 abuts against the circular arc of the arc-shaped structure 21, and the clamping column 23 on the side surface of the output shaft 12 is on the inner side of the smaller width of the convex clamping groove 22; after the driving machine is started, the clamping column 23 on the side surface of the input shaft 11 rotates with the input shaft 11, the clamping column 23 drives the shaft sleeve 2 to rotate through the friction force of abutting against the arc-shaped structure 21, and the shaft sleeve 2 drives the output shaft 12 and the working machine to rotate through the clamping effect of the convex clamping groove 22 and the clamping column 23 on the side surface of the output shaft 12, so that the torque transmission is realized; when the rotating torque of the driving machine driving the input shaft 11 is greater than the abutting friction force formed by the clamping column 23 and the arc-shaped structure 21, the clamping column 23 is separated from the arc-shaped structure 21 and is arranged at one end of the shaft sleeve 2, so that the shaft sleeve 2 is pushed to move towards the output shaft 12, the clamping column 23 on the side surface of the output shaft 12 is clamped to the inner side of the larger width of the convex clamping groove 22 through sliding, and then the motion transmission of the input shaft 11 and the output shaft 12 is separated, so that the overload protection is realized; when the load between the driving machine and the working machine changes, according to the required torque limiting force, the adjusting bolt 34 on the fixed sheet 3 is rotated, the first movable sheet 31 moves along the length direction of the adjusting bolt 34, the distance between the first movable sheet 31 and the second movable sheet 32 is changed, the force of the reset spring 33 abutting against the shaft sleeve 2 is further changed, the friction force of the clamping column 23 on the side surface of the input shaft 11 abutting against the arc-shaped structure 21 is adjusted, the dynamic adjustment of the spring force is realized through simple and precise operation, the trigger point of the torque overload limitation is flexibly adjusted, different working environments and load conditions are adapted, and the application range and flexibility of the torque limiter are improved.

[0029] Specifically, the adjustment of the torque limiting force is that the torque limiting force between the driving machine and the working machine is determined first, the spring force value corresponding to the required torque limiting force is calculated, the corresponding moving distance is converted to extrude the spring, and the spring force value reaches the required torque limiting force, so that the precise adjustment is realized, wherein the spring force value and the calculation method can be known by the technical personnel through a technical manual or through a conventional experimental method, and details are not described herein.

[0030] In some embodiments, a plurality of guide rods 4 are fixed to one side of the second movable piece 32, and the side surfaces of the guide rods 4 are respectively sleeved with the inner sides of the first movable piece 31 and the fixed piece 3; the arrangement of the guide rods 4 ensures the stability of the first movable piece 31 and the second movable piece 32 during movement, prevents tilting or deviation due to uneven force, and at the same time, the sleeving of the guide rods 4 with the inner sides of the first movable piece 31 and the fixed piece 3 ensures the overall stability of the elastic mechanism when subjected to force.

[0031] In some embodiments, the side surface of one end of the guide rod 4 close to the fixed piece 3 is provided with a scale table 5 for measuring the moving distance of the first movable piece 31 to the second movable piece 32; the arrangement of the scale table 5 can help users intuitively understand the displacement amount of the torque limiter when overloaded, so as to judge its working state and performance.

[0032] As shown in Figure 3 In some embodiments, the arc-shaped structure 21 includes, from inside to outside, a resisting portion 211, a sliding portion 212, and an overload portion 213; the resisting portion 211 is used for resisting the side surface of the clamping column 23 on the input shaft 11 when transmitting power, the sliding portion 212 is used for resisting the side surface of the clamping column 23 on the input shaft 11 when the torque is large, and the overload portion 213 is used for resisting the side surface of the clamping column 23 on the input shaft 11 when overload protection.

[0033] It should be noted that, when transmitting normal torque, the clamping column 23 on the side surface of the input shaft 11 will be in contact with the resisting portion 211; when the torque gradually increases, the clamping column 23 will gradually slide from the resisting portion 211 to the sliding portion 212 to resist, thereby generating a certain sliding friction and playing a buffering role; when the torque exceeds the set value, the clamping column 23 will slide out from the sliding portion 212 to the overload portion 213, thereby interrupting the power transmission and achieving overload protection.

[0034] In some embodiments, the convex clamping groove 22 includes a transmission groove 221 and a clamping groove 222 close to the arc-shaped structure 21 and communicating with the transmission groove 221; the transmission groove 221 is used for resisting the side surface of the clamping column 23 on the output shaft 12 when transmitting power, and the clamping groove 222 is used for resisting the side surface of the clamping column 23 on the output shaft 12 when overload protection.

[0035] It should be noted that, when transmitting normal torque, the clamping column 23 on the side surface of the output shaft 12 will be clamped with the inner side of the transmission groove 221; when overload protection, the shaft sleeve 2 is pushed by the clamping column 23 on the side surface of the input shaft 11, which will force the clamping column 23 on the side surface of the output shaft 12 to switch from the transmission groove 221 to the inside of the clamping groove 222; only by reversely rotating the output shaft 12, the clamping column 23 on the side surface of the output shaft 12 can be switched from the clamping groove 222 back to the inside of the transmission groove 221 to complete the reset of the torque transmission, thereby ensuring that the output shaft 12 can smoothly change from the transmission state to the protection state when overloaded, and avoiding damage caused by excessive torque.

[0036] like Figure 1 As shown, in some embodiments, a plurality of bearing seats 6 are provided on the base plate 1, and the inner sides of the plurality of bearing seats 6 are respectively fixed to the sides of the input shaft 11 and the output shaft 12; by providing the bearing seats 6, the installation stability and rotational flexibility of the input shaft 11 and the output shaft 12 on the base plate 1 are improved.

[0037] In some embodiments, the bottom of the bearing housing 6 is provided with a plurality of mounting holes 61 for connecting to the top of the base plate 1 using fasteners; by providing mounting holes 61, the bearing housing 6 can be conveniently connected to the top of the base plate 1 using fasteners, thereby fixing the positions of the input shaft 11 and the output shaft 12.

[0038] In some embodiments, a protective frame 7 is provided on the top of the base plate 1 to protect the components on the top of the base plate 1. Several mounting blocks 71 are fixed on the sides of the protective frame 7 for connecting to the top of the base plate 1 with fasteners. The protective frame 7 can protect the components on the top of the base plate 1 and prevent damage or failure caused by external factors (such as collision, dust, etc.). At the same time, with the cooperation of the mounting blocks 71 and the fasteners, the protective frame 7 can be easily fixed to the base plate 1.

[0039] In some embodiments, the top of the base plate 1 is fixed with a plurality of positioning blocks 8 for connecting to the working position using fasteners; the positioning blocks 8 facilitate the installation and positioning of the torque limiter in the working position, and by connecting the positioning blocks 8 to the top of the base plate 1 and the working position using fasteners, the stability and accuracy of the torque limiter during operation can be ensured.

[0040] The utility model discloses a torque overload protection device, comprising a main motor, a working machine, an input shaft 11, an output shaft 12, a shaft sleeve 2, a reset spring 33, a first movable piece 31, a second movable piece 32, a adjusting bolt 34, a arc structure 21 and a convex type clamping groove 22.

[0041] The above is according to the ideal embodiment of the utility model for the inspiration, through the above-mentioned explanation content, for the person skilled in the art, obviously, the utility model is not limited to the details of the above exemplary embodiments, and can realize the utility model in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, no matter from which point, should regard the embodiment as the demonstration, and is non - limited, the scope of the utility model is defined by the appended claims instead of the above description, therefore, all the changes falling in the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any figure mark in the claims should not be regarded as the restriction of the claim involved.

[0042] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, the description manner of the specification is only for the sake of clarity, the person skilled in the art should regard the specification as a whole, the technical solution in each embodiment can also be combined appropriately, form other embodiments that the person skilled in the art can understand.

Claims

1. A precision adjustable torque limiter characterized by, Include: The bottom plate (1), the input shaft (11) and the output shaft (12) coaxially installed on the top of the bottom plate (1), and the shaft sleeve (2) sleeved on the opposite end of the input shaft (11) and the output shaft (12); The end of the shaft sleeve (2) opposite to the input shaft (11) is provided with an arc structure (21), the side surface close to the other end of the shaft sleeve (2) is provided with a convex clamping groove (22), the side surface of the input shaft (11) and the output shaft (12) is fixed with a clamping column (23), the side surface of the clamping column (23) on the input shaft (11) is in contact with one side of the arc structure (21), and the side surface of the clamping column (23) on the output shaft (12) is in contact with the inner side of the convex clamping groove (22). The side surface of the output shaft (12) is provided with an elastic mechanism, the elastic mechanism comprises: a fixed sheet (3) fixed on the side surface of the output shaft (12), a first movable sheet (31) and a second movable sheet (32) which are sequentially sleeved on the side surface of the output shaft (12), and a reset spring (33) fixed between the first movable sheet (31) and the second movable sheet (32); a plurality of adjusting bolts (34) are rotatably connected to the fixed sheet (3), and the side surface of the adjusting bolt (34) is threadedly connected with the inner side of the first movable sheet (31).

2. A precision adjustable torque limiter as claimed in claim 1, wherein: The shaft sleeve (2), the fixed sheet (3), the first movable sheet (31), the second movable sheet (32), the input shaft (11) and the output shaft (12) are coaxially arranged, one side of the second movable sheet (32) is in contact with one end of the shaft sleeve (2), and the reset spring (33) is sleeved on the side surface of the output shaft (12).

3. A precision adjustable torque limiter as claimed in claim 1, wherein: One side of the second movable sheet (32) is fixed with a plurality of guide rods (4), and the side surfaces of the guide rods (4) are respectively sleeved with the inner sides of the first movable sheet (31) and the fixed sheet (3).

4. A precision adjustable torque limiter as claimed in claim 3, wherein: The side surface of one end of the guide rod (4) close to the fixed sheet (3) is provided with a scale table (5) for measuring the moving distance of the first movable sheet (31) to the second movable sheet (32).

5. A precision adjustable torque limiter as claimed in claim 1, wherein: The arc structure (21) comprises, from inside to outside: a contact part (211), a sliding part (212) and an overload part (213); the contact part (211) is used for the contact of the side surface of the clamping column (23) on the input shaft (11) when transmitting power, the sliding part (212) is used for the contact of the side surface of the clamping column (23) on the input shaft (11) when the torque is large, and the overload part (213) is used for the contact of the side surface of the clamping column (23) on the input shaft (11) when overload protection.

6. A precision adjustable torque limiter as claimed in claim 1, wherein: The convex clamping groove (22) comprises: a transmission groove (221), and a clamping groove (222) in communication with the transmission groove (221) close to the arc structure (21); the transmission groove (221) is used for the contact of the side surface of the clamping column (23) on the output shaft (12) when transmitting power, and the clamping groove (222) is used for the contact of the side surface of the clamping column (23) on the output shaft (12) when overload protection.

7. A precision adjustable torque limiter as claimed in claim 1, wherein: The bottom plate (1) is provided with a plurality of bearing seats (6), and the inner sides of the plurality of bearing seats (6) are fixed with the side surfaces of the input shaft (11) and the output shaft (12) respectively.

8. A precision adjustable torque limiter as claimed in claim 7, wherein: The bottom of the bearing seat (6) is provided with a plurality of mounting holes (61) for connecting the top of the bottom plate (1) by fasteners.

9. A precision adjustable torque limiter as claimed in claim 1, wherein: The top of the bottom plate (1) is provided with a protection frame (7) for protecting the components on the top of the bottom plate (1), and the side surface of the protection frame (7) is fixed with a plurality of mounting blocks (71) for connecting the top of the bottom plate (1) by fasteners.

10. A precision adjustable torque limiter as claimed in claim 1, wherein: The top of the bottom plate (1) is fixed with a plurality of positioning blocks (8) for connecting the working position by fasteners.

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