Pull rod type moment limiter

Abstract

The utility model provides a pull rod type moment limiter which comprises a box body, a detection mechanism arranged in the box body, a first pull rod and a second pull rod which are connected with the detection mechanism, and a mounting mechanism connected with the first pull rod. The installation mechanism comprises a first clamping plate close to the box body, a second clamping plate located on the side, away from the box body, of the first clamping plate, and a first limiting assembly which is connected with the first clamping plate and the second clamping plate and limits the first clamping plate and the second clamping plate to rotate relative to an installation plane. The first pull rod penetrates through the first clamping plate and is in threaded connection with the second clamping plate, and a second limiting assembly for limiting rotation of the first pull rod is arranged on the first clamping plate. According to the utility model, the stability of the moment limiter can be improved, the pull rod and the connecting position are not easy to loosen, and the stability of a detection result is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of torque limiters, in particular to a pull rod type torque limiter. Background Art

[0002] In order to prevent safety accidents caused by torque overload during crane operation, a torque limiter needs to be installed on the crane. When the torque generated by the crane's hoisting gravity exceeds the set threshold, the torque limiter will trigger the electronic control device to avoid torque overload.

[0003] When installing the pull-rod torque limiter, its two pull rods are respectively connected to the rope for detecting torque and a certain part of the crane, and are generally installed by a single threaded connection. However, during the operation of the crane, the pull-rod torque limiter and the connection position are prone to relative rotation, resulting in looseness, which affects the accuracy of the detected torque. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a pull rod type torque limiter, which improves the stability between the pull rod torque limiter and the installation position and ensures the stability of the detection result thereof.

[0005] According to an embodiment of the utility model, the utility model provides a pull rod type torque limiter, comprising a box body, a detection mechanism arranged in the box body, a first pull rod and a second pull rod connected to the detection mechanism, and an installation mechanism connected to the first pull rod, characterized in that the installation mechanism comprises a first clamping plate close to the box body, a second clamping plate located on the side of the first clamping plate away from the box body, a first limiting component connecting the first clamping plate and the second clamping plate and limiting their relative rotation with the installation plane, the first pull rod passes through the first clamping plate and is threadedly connected to the second clamping plate, and the first clamping plate is provided with a second limiting component that limits the rotation of the first pull rod.

[0006] Preferably, a group of coaxially arranged first through holes are provided on the first clamping plate and the second clamping plate, a threaded connection tube coaxially arranged with the first through hole is fixedly connected to the side of the second clamping plate away from the first clamping plate, and a threaded connection head is provided at the end of the first pull rod.

[0007] Further preferably, at least two groups of coaxially arranged second through holes are provided on the first clamping plate and the second clamping plate, and the first limiting assembly includes a plurality of groups of bolt connectors respectively matched with the plurality of groups of the second through holes.

[0008] Further preferably, the second limiting assembly includes a limiting column fixedly connected to the first clamping plate and coaxially arranged with the first pull rod, and limiting grooves evenly distributed on the side of the limiting column, the limiting column is provided with a third through hole coaxially arranged with the first pull rod, the first pull rod is provided with a limiting sleeve coaxially arranged with the first pull rod and non-rotatable, and at least one limiting block is provided on the inner wall of the limiting sleeve.

[0009] Further preferably, the limiting sleeve is slidably connected to the first pull rod, and the limiting sleeve is connected to the limiting column via a clamping assembly.

[0010] Further preferably, the clamping assembly includes an elastic rod fixedly connected to the limiting sleeve, a push rod connected to the elastic rod and radially penetrating the limiting sleeve, the limiting column is provided with a matching hole coaxial with the third through hole at one end close to the limiting sleeve, the diameter of the matching hole is larger than the third through hole, an annular clamping groove is provided on the side wall of the matching hole, and the end of the elastic rod is provided with a clamping block matching with the clamping groove.

[0011] Further preferably, two elastic rods are provided and are parallel to the first pull rod, and the two elastic rods are symmetrically arranged with respect to the first pull rod.

[0012] Still further preferably, a sliding groove parallel to the axis of the first pull rod is provided on the side wall thereof, and a sliding block slidably matched with the sliding groove is fixedly connected to the limiting sleeve.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] A first limit component is provided to connect the mounting mechanism and the mounting position. Under the action of the first limit component, relative rotation will not occur between the mounting mechanism and the mounting position. A second limit component is also provided on the mounting mechanism to limit the first pull rod, so that relative rotation will not occur between the first pull rod and the mounting mechanism. Therefore, the torque limiter itself will not rotate, and relative rotation will not occur between the first pull rod and the mounting mechanism, thereby ensuring that the first pull rod is stable when threadedly connected to the mounting mechanism and is not prone to loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a schematic diagram of the structure of a pull rod type torque limiter.

[0016] Figure 2 This is the intention of the matching structure of the second limit assembly in a pull rod type torque limiter of the utility model.

[0017] In the above drawings: 1. box body; 101. first pull rod; 102. second pull rod; 103. threaded connector; 104. slide groove; 2. mounting mechanism; 201. first clamp; 202. second clamp; 203. first through hole; 204. second through hole; 205. threaded connection tube; 210. first limiting assembly; 220. second limiting assembly; 221. limiting column; 222. limiting groove; 223. limiting sleeve; 224. limiting block; 225. third through hole; 226. slider; 230. snap-fit ​​assembly; 231. elastic rod; 232. push rod; 233. matching hole; 234. snap-fit ​​groove; 235. snap-fit ​​block. DETAILED DESCRIPTION

[0018] The technical solution of the present utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0019] like Figure 1 As shown, the utility model provides a pull rod type torque limiter, comprising a box body 1, a detection mechanism arranged in the box body 1, a first pull rod 101 and a second pull rod 102 connected to the detection mechanism, and a mounting mechanism 2 connected to the first pull rod 101, which is fixed to a mounting plane through the mounting mechanism 2, wherein the mounting mechanism 2 comprises a first clamping plate 201 close to the box body 1, a second clamping plate 202 located on a side of the first clamping plate 201 away from the box body 1, and a first limiting component 210 connecting the first clamping plate 201 and the second clamping plate 202 and limiting their relative rotation with the mounting plane, the first pull rod 101 passes through the first clamping plate 201 and is threadedly connected to the second clamping plate 202, and the first clamping plate 201 is provided with a second limiting component 220 that limits the rotation of the first pull rod 101;

[0020] During installation, at least one through hole is provided on the load-bearing beam for installing the pull-rod type torque limiter, and the first clamping plate 201 and the second clamping plate 202 are respectively arranged on opposite sides of the load-bearing beam and are connected and fixed by the first limiting assembly 210. The first pull rod 101 penetrates the first clamping plate 201 and is connected to the second clamping plate 202 after passing through the through hole. After the connection is firmly established, under the action of the second limiting assembly 220, the first pull rod 101 and the first clamping plate 201 will not rotate relative to each other, and because the positions between the first clamping plate 201 and the second clamping plate 202 are relatively stable, the first pull rod 101 and the second clamping plate 202 will not rotate relative to each other, so the first pull rod 101 and the second clamping plate 202 will not loosen, because under the action of the first limiting assembly 210, the first clamping plate 201, the second clamping plate 202 and the load-bearing beam are relatively stable, so the pull-rod type torque limiter itself will not rotate, and the stability of the connection of the second clamping rod 102 is maintained;

[0021] Specifically, a group of coaxially arranged first through holes 203 are provided on the first clamping plate 201 and the second clamping plate 202, a threaded connection tube 205 coaxially arranged with the first through hole 203 is fixedly connected to the side of the second clamping plate 202 away from the first clamping plate 201, and a threaded connection head 103 is provided at the end of the first pull rod 101;

[0022] Specifically, at least two groups of coaxially arranged second through holes 204 are provided on the first clamping plate 201 and the second clamping plate 202, and the first limit assembly 210 includes multiple groups of bolt connectors respectively matched with multiple groups of second through holes 204. In this embodiment, two groups of second through holes 204 are provided, and the two groups of second through holes 204 are respectively provided on both sides of the first through hole 203. Two through holes are also provided on the bearing beam on which the pull rod type torque limiter is installed, and the bolt connectors are connected and fixed after passing through the second through holes 204 and the through holes on the bearing beam;

[0023] like Figure 2 As shown, the second limiting assembly 220 includes a limiting column 221 fixedly connected to the first clamping plate 201 and coaxially arranged with the first pull rod 101, and a limiting groove 222 evenly distributed on the side of the limiting column 221, the limiting groove 222 is a long strip groove parallel to the axis of the limiting column 221, the limiting column 221 is provided with a third through hole 225 coaxially arranged with the first pull rod 101, the first pull rod 101 is provided with a limiting sleeve 223 coaxially arranged with the first pull rod 101 and non-rotatable, and relative rotation does not occur between the limiting sleeve 223 and the first pull rod 101, and at least one limiting block 224 is provided on the inner wall of the limiting sleeve 223, and the shape of the limiting block 224 is consistent with the limiting groove 222, so that the limiting block 224 can freely enter and exit the limiting groove 222;

[0024] In order to facilitate the installation mechanism 2 to adjust according to the thickness of the load-bearing beam and ensure the installation and fixation, in a further embodiment, the limiting sleeve 223 is slidably connected to the first pull rod 101, the limiting sleeve 223 can be adjusted axially along the first pull rod 101, and the limiting sleeve 223 and the limiting column 221 are connected through a clamping assembly 230;

[0025] During the installation process, the first clamping plate 201 and the second clamping plate 202 are first installed and fixed, and then the first pull rod 101 is connected and fixed with the second clamping plate 202, and then the sliding limit sleeve 223 cooperates with the limit column 221, and under the action of the clamping assembly 230, the relative position between the limit sleeve 223 and the limit column 221 is fixed, and under the action of the limit block 224 and the limit groove 222, the limit sleeve 223 cannot rotate, and the limit sleeve 223 restricts the first pull rod 101 from rotating;

[0026] Specifically, the clamping assembly 230 includes an elastic rod 231 fixedly connected to the limiting sleeve 223, a push rod 232 connected to the elastic rod 231 and radially penetrating the limiting sleeve 223, the limiting sleeve 223 is provided with a through hole that is clearance-matched with the push rod 232, the limiting column 221 is provided with a matching hole 233 coaxial with the third through hole 225 at one end close to the limiting sleeve 223, the matching hole 233 has a larger diameter than the third through hole 225, an annular clamping groove 234 is provided on the side wall of the matching hole 233, and the end of the elastic rod 231 is provided with a clamping block 235 that matches the clamping groove 234;

[0027] The annular clamping groove 234 is provided so that the clamping block 235 can cooperate with the clamping groove 234 when the limiting sleeve 223 is in any position; pressing the push rod 232 can make the clamping block 235 leave the clamping groove 234, which is convenient for disassembly;

[0028] In order to improve the stability of the limiting sleeve 223 after being clamped, in a further embodiment, two elastic rods 231 are provided and are parallel to the first pull rod 101 , and the two elastic rods 231 are symmetrically arranged with respect to the first pull rod 101 .

[0029] Specifically, a sliding groove 104 parallel to the axis of the first pull rod 101 is provided on the side wall thereof, and a sliding block 226 slidably matched with the sliding groove 104 is fixedly connected to the limiting sleeve 223 .

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A pull rod type torque limiter, comprising a box body (1), a detection mechanism arranged in the box body (1), a first pull rod (101) and a second pull rod (102) connected to the detection mechanism, and a mounting mechanism (2) connected to the first pull rod (101), characterized in that: The mounting mechanism (2) comprises a first clamping plate (201) close to the box body (1), a second clamping plate (202) located on the side of the first clamping plate (201) away from the box body (1), and a first limiting component (210) connecting the first clamping plate (201) and the second clamping plate (202) and limiting their relative rotation with respect to the mounting plane; the first pull rod (101) passes through the first clamping plate (201) and is threadedly connected to the second clamping plate (202); and the first clamping plate (201) is provided with a second limiting component (220) for limiting the rotation of the first pull rod (101).

2. A pull rod type torque limiter according to claim 1, characterized in that: A group of coaxially arranged first through holes (203) are provided on the first clamping plate (201) and the second clamping plate (202); a threaded connection tube (205) coaxially arranged with the first through hole (203) is fixedly connected to the side of the second clamping plate (202) away from the first clamping plate (201); and a threaded connection head (103) is provided at the end of the first pull rod (101).

3. A pull rod type torque limiter according to claim 1, characterized in that: The first clamping plate (201) and the second clamping plate (202) are provided with at least two groups of second through holes (204) respectively arranged coaxially, and the first limiting assembly (210) comprises a plurality of groups of bolt connectors respectively matched with the plurality of groups of the second through holes (204).

4. A pull rod type torque limiter according to claim 1, characterized in that: The second limiting assembly (220) comprises a limiting column (221) fixedly connected to the first clamping plate (201) and coaxially arranged with the first pull rod (101), and limiting grooves (222) evenly distributed on the side of the limiting column (221); the limiting column (221) is provided with a third through hole (225) coaxially arranged with the first pull rod (101); the first pull rod (101) is provided with a limiting sleeve (223) coaxially arranged with the first pull rod (101) and non-rotatable; and at least one limiting block (224) is provided on the inner wall of the limiting sleeve (223).

5. A pull rod type torque limiter according to claim 4, characterized in that: The limiting sleeve (223) is slidably connected to the first pull rod (101), and the limiting sleeve (223) is connected to the limiting column (221) via a clamping assembly (230).

6. A pull rod type torque limiter according to claim 5, characterized in that: The clamping assembly (230) comprises an elastic rod (231) fixedly connected to the limiting sleeve (223), and a push rod (232) connected to the elastic rod (231) and radially penetrating the limiting sleeve (223); an end of the limiting column (221) close to the limiting sleeve (223) is provided with a matching hole (233) coaxial with the third through hole (225); the diameter of the matching hole (233) is larger than that of the third through hole (225); an annular clamping groove (234) is provided on the side wall of the matching hole (233); and a clamping block (235) matching with the clamping groove (234) is provided at the end of the elastic rod (231).

7. A pull rod type torque limiter according to claim 6, characterized in that: Two elastic rods (231) are provided and are parallel to the first pull rod (101), and the two elastic rods (231) are symmetrically arranged with respect to the first pull rod (101).

8. A pull rod type torque limiter according to claim 5, characterized in that: A sliding groove (104) parallel to the axis of the first pull rod (101) is provided on the side wall thereof, and a sliding block (226) slidably matched with the sliding groove (104) is fixedly connected to the limiting sleeve (223).

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