Pull rope deviation switch

Abstract

The utility model discloses a pull rope deviation switch, which relates to the field of pull rope switches and comprises a shell assembly, a transmission assembly, an induction assembly, a locking assembly and a wire passing assembly. The shell assembly comprises a shell and a rear cover installed at one end of the shell. The transmission assembly comprises a mandrel inserted into the end, away from the rear cover, of the shell, a cam connected to the end, close to the rear cover, of the mandrel, and a pull rope swing arm component installed at the ends, away from the rear cover, of the mandrel and the shell. The sensing assembly is mounted at a preset position in the shell and is matched with the transmission mechanism; the locking assembly is arranged at a preset position on the shell in a penetrating mode. The pull rope handle is arranged to be connected with the pull rope, the situation that the interior of the product is locked and a signal is output to give an alarm once the left end and the right end of the pull rope handle swing beyond a certain amplitude in the running process of the belt conveyor under the abnormal condition can be prevented, the pull rope is achieved only through the microswitch, the anti-interference capacity is high, and the safety is high. Deviation alarm information is achieved through a mechanical structure.

Description

Technical Field

[0001] The utility model relates to the field of pull-rope switches, in particular to a pull-rope deviation switch. Background Art

[0002] In the prior art, the pull-rope deviation switch is a key device for protecting the belt system. Its working principle is very simple. There is a micro switch inside the pull-rope deviation switch. When the device needs to be protected, the mechanical device drives the micro switch to close and open the contacts, thereby driving the control circuit of the system to realize protective action.

[0003] However, there are still some problems with the current pull-rope deviation switch. For example, the internal structure of the existing pull-rope switch is relatively complex, and the components are numerous and not simple enough. Not only is the cost high, but it is also easy to cause waste of manpower and material resources. At the same time, it is not suitable for field environments with more complex working conditions, and has poor anti-interference ability. Utility Model Content

[0004] Purpose of the utility model: In view of the above shortcomings, the utility model provides a pull rope deviation switch to solve the above problems existing in the prior art.

[0005] Technical solution: A pull rope deviation switch, including a housing component, a transmission component, a sensing component, a locking component and a wire passing component;

[0006] Among them, the shell assembly includes a shell and a back cover installed at one end of the shell; the transmission assembly includes a core shaft inserted into the end of the shell away from the back cover, a cam connected to the end of the core shaft close to the back cover, and a pull rope swing arm component installed on the core shaft and the end of the shell away from the back cover; the sensing assembly is installed at a predetermined position in the shell and cooperates with the transmission mechanism for sensing alarm; the locking assembly is arranged at a predetermined position on the shell for locking the transmission assembly; the wire passing assembly is installed at a predetermined position on the shell for passing the wire.

[0007] In a further embodiment, an axial groove for assembling the core shaft is formed through one side of the shell away from the rear cover, and the cross-section of the axial groove is convex, including a wide groove close to the rear cover and a narrow groove away from the rear cover.

[0008] In a further embodiment, a second sealing ring is provided between the core shaft and the wide groove, and an oil-free bushing is provided between the core shaft and the wide groove.

[0009] In a further embodiment, the wire-through assembly includes two cable glands;

[0010] Among them, two cable glands are installed at predetermined positions on the shell correspondingly, and the interior of the cable glands is hollow and connected with the interior of the shell for passing the wires.

[0011] In a further embodiment, the pull rope swing arm component includes a mounting seat and a pull rope handle;

[0012] The mounting seat is clamped on one end of the core shaft away from the rear cover, and is rotatably connected to one end of the shell away from the rear cover; the rope handle is connected to the mounting seat, and a rope groove for installing the rope is opened through the rope handle.

[0013] In a further embodiment, pin holes are correspondingly provided on the mounting seat and the core shaft, and an elastic cylindrical pin for connecting the mounting seat and the core shaft is cooperatedly provided in the pin hole.

[0014] In a further embodiment, a first sealing ring is provided at a predetermined position between the rear cover and the housing.

[0015] In a further embodiment, the locking assembly includes a locking portion, an end cap, and a latch seal;

[0016] Among them, the locking part is arranged at a predetermined position on the shell and one end close to the shell abuts against the transmission component; the end cover is arranged on the outside of the shell and abuts against the locking part, which is used to control the locking part; the latch seal is installed on the end cover and the locking part for sealing protection.

[0017] In a further embodiment, the locking portion includes a locking housing, a pull rod and a third sealing ring;

[0018] Among them, the locking shell is installed through the predetermined position of the shell and is connected to the end away from the latch seal, and a rod groove is arranged through the middle of the locking shell; the pull rod is slidingly connected to the locking shell through the rod groove, and the end of the pull rod away from the shell is connected to the end cover; the third sealing ring is arranged between the locking shell and the shell.

[0019] In addition, a locking hole matched with the end of the pull rod is arranged at a predetermined position on the core shaft, which is used to lock the core shaft in cooperation with the pull rod.

[0020] In a further embodiment, the cross-section of the pull rod located in the rod groove is "convex" shaped, including a narrow portion close to the end cover and a wide portion away from the end cover, and a locking spring located outside the narrow portion is connected between the wide portion and the inner wall of the rod groove.

[0021] Beneficial effect: The utility model discloses a pull-rope deviation switch, which can prevent, for example, abnormal situations during the operation of a belt conveyor by setting a pull-rope handle connected to the pull rope. After the left and right ends of the pull-rope handle swing more than a certain amplitude, the inside of the product is locked and a signal is output for alarm. The pull rope is realized only by a micro switch, with strong anti-interference ability, and the deviation alarm information is realized by a mechanical structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0023] Figure 2 It is a three-dimensional structural schematic diagram of the utility model from another viewing angle.

[0024] Figure 3 It is a cross-sectional structural schematic diagram of the utility model from another viewing angle.

[0025] The reference numerals in the figure are: 1. rear cover, 2. housing, 3. rope handle, 4. elastic cylindrical pin, 5. core shaft, 6. gland, 7. latch seal, 8. end cover, 9. first sealing ring, 10. second sealing ring, 11. oil-free bushing, 12. micro switch, 13. inner spring, 14. latch, 15. locking housing, 16. third sealing ring, 17. locking spring, 18. pull rod. DETAILED DESCRIPTION

[0026] In the following description, a large number of specific details are given to provide a more thorough understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the utility model, some technical features known in the art are not described.

[0027] The applicant believes that the internal structure of the existing pull-cord switch is relatively complex, with many components and is not simple enough. It is not only costly, but also easily causes waste of manpower and material resources. At the same time, it is not suitable for field environments with more complex working conditions and has poor anti-interference capabilities.

[0028] To this end, the applicant proposes a pull rope deviation switch, such as Figure 1-Figure 3 As shown, it includes a housing assembly, a transmission assembly, a sensing assembly, a locking assembly and a wire passing assembly.

[0029] The housing assembly includes a housing 2 and a back cover 1 installed at one end of the housing 2 .

[0030] The transmission assembly includes a core shaft 5 inserted into the end of the shell 2 away from the rear cover 1, a cam connected to the end of the core shaft 5 close to the rear cover 1, and a pull rope swing arm component installed on the core shaft 5 and the end of the shell 2 away from the rear cover 1.

[0031] In addition, an inner spring 13 is provided at a predetermined position on the core shaft 5, and a latch 14 is inserted at a predetermined position on one side of the core shaft 5 close to the cam.

[0032] The sensing component is installed at a predetermined position in the housing 2 and cooperates with the transmission mechanism for sensing alarm, etc. It mainly includes a micro switch 12 and a circuit board component, etc. The specific structure and principle can refer to the structure and principle of the relevant components of the pull-cord switch in the prior art.

[0033] The locking assembly is disposed at a predetermined position on the housing 2 and is used to lock the transmission assembly, and includes a locking portion, an end cover 8 and a latch seal 7 .

[0034] Among them, the locking part is arranged at a predetermined position on the shell 2 and one end close to the shell 2 abuts against the transmission component; the end cover 8 is arranged on the outside of the shell 2 and abuts against the locking part, which is used to control the locking part; the latch seal 7 is installed on the end cover 8 and the locking part for sealing protection.

[0035] In the present application, the preferred material of the latch seal 7 is silicone rubber, and the preferred material of the end cover 8 is SUS304.

[0036] In addition, the locking portion includes a locking housing 15 , a pull rod 18 and a third sealing ring 16 .

[0037] Among them, the locking shell 15 is installed through the predetermined position of the shell 2 and is connected to the end of the pin seal 7 away from the end cover 8. A rod groove is arranged through the middle of the locking shell 15. The pull rod 18 is slidingly connected to the locking shell 15 through the rod groove. The end of the pull rod 18 away from the shell 2 is connected to the end cover 8. The third sealing ring 16 is arranged between the locking shell 15 and the shell 2.

[0038] In the present application, a locking hole that is accurately calculated and matches the end of the pull rod 18 is provided at a predetermined position on the core shaft 5, which is used to cooperate with the pull rod 18 to lock the core shaft 5. When the deviation exceeds a predetermined angle, which is 20° in this application, the external pull rod 18 will enter the locking hole to prevent the core shaft 5 from rotating, and at the same time trigger the micro switch 12 to output an alarm signal.

[0039] In addition, the cross-section of the pull rod 18 located in the rod groove is "convex" shaped, including a narrow portion close to the end cover 8 and a wide portion away from the end cover 8. A locking spring 17 located outside the narrow portion is connected between the wide portion and the inner wall of the rod groove.

[0040] like Figure 1-Figure 3 As shown, the wire passing assembly is installed at a predetermined position on the shell 2 for passing the wires. The wire passing assembly includes two cable glands 6 installed at the predetermined positions on the shell 2 respectively. The two cable glands 6 are hollow inside and communicate with the inside of the shell 2 for passing the wires.

[0041] In addition, in the present application, the preferred material of the back cover 1 and the shell 2 is ADC12, and the preferred material of the core shaft 5 is SUS420J1.

[0042] like Figure 1-Figure 3 As shown, the rope pull arm component includes a mounting seat and a rope pull handle 3.

[0043] Among them, the mounting seat is clamped on the end of the core shaft 5 away from the back cover 1, and is rotatably connected to the end of the shell 2 away from the back cover 1, the pull rope handle 3 is connected to the mounting seat, and a pull rope groove for installing the pull rope is opened on the pull rope handle 3. Pin holes are correspondingly opened on the mounting seat and the core shaft 5, and an elastic cylindrical pin 4 for connecting the mounting seat and the core shaft 5 is arranged in the pin hole.

[0044] In the present application, the preferred material of the pull rope handle 3 is PA6GF15, and the preferred material of the elastic cylindrical pin 4 is 65 manganese.

[0045] In addition, the present application also includes a sealing assembly, including a first sealing ring 9, a second sealing ring 10 and an oil-free bushing 11, etc.

[0046] Among them, an axial groove for assembling the core shaft 5 is opened through one side of the shell 2 away from the rear cover 1, and the cross-section of the axial groove is "convex", including a wide groove on the side close to the rear cover 1, and a narrow groove on the side away from the rear cover 1. The second sealing ring 10 is arranged between the core shaft 5 and the groove, the oil-free bushing 11 is arranged between the core shaft 5 and the wide groove, and the first sealing ring 9 is arranged at a predetermined position between the rear cover 1 and the shell 2, for sealing and connecting the rear cover 1 and the shell 2.

[0047] In the present application, the first sealing ring 9, the second sealing ring 10 and the third sealing ring 16 can all be O-rings, and the preferred materials of the first sealing ring 9 and the second sealing ring 10 can both be nitrile.

[0048] As above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be interpreted as limiting the present invention itself. Various changes can be made to it in form and detail without departing from the spirit and scope of the present invention defined in the appended claims.

Claims

1. A pull rope deviation switch, It is characterized in that include: A housing assembly, comprising a housing and a rear cover mounted at one end of the housing; The transmission assembly includes a core shaft inserted into the end of the housing away from the rear cover, a cam connected to the end of the core shaft close to the rear cover, and a pull rope swing arm component installed on the core shaft and the end of the housing away from the rear cover; A sensing component is installed at a predetermined position in the housing and cooperates with the transmission mechanism to sense an alarm; A locking assembly is disposed through a predetermined position on the housing and is used to lock the transmission assembly; A wire passing assembly is installed at a predetermined position on the housing and is used for passing wires.

2. A pull rope deviation switch according to claim 1, Features: An axial groove for assembling the core shaft is formed through one side of the shell away from the rear cover. The cross section of the axial groove is convex, including a wide groove close to the rear cover and a narrow groove away from the rear cover.

3. A pull rope deviation switch according to claim 2, Features: A second sealing ring is arranged between the core shaft and the wide groove, and an oil-free bushing is arranged between the core shaft and the wide groove.

4. A pull rope deviation switch according to claim 1, Features: The through-line assembly comprises: Two cable glands are correspondingly installed at predetermined positions on the shell. The interior of the cable glands is hollow and communicated with the interior of the shell for passing wires.

5. A pull rope deviation switch according to claim 1, Features: The pull rope swing arm component comprises: A mounting seat, which is clamped to an end of the core shaft away from the rear cover and is rotatably connected to an end of the shell away from the rear cover; The drawstring handle is connected to the mounting seat, and a drawstring groove for installing the drawstring is formed through the drawstring handle.

6. A pull rope deviation switch according to claim 5, Features: The mounting seat and the core shaft are correspondingly provided with pin holes, and the pin holes are matched with elastic cylindrical pins used to connect the mounting seat and the core shaft.

7. A pull rope deviation switch according to claim 1, Features: A first sealing ring is arranged at a predetermined position between the rear cover and the housing.

8. A pull rope deviation switch according to claim 1, Features: The locking assembly comprises: A locking portion is provided through the housing at a predetermined position and one end close to the housing abuts against the transmission assembly; An end cover, disposed outside the housing and abutting against the locking portion, for controlling the locking portion; The latch seal is installed on the end cover and the locking part for sealing protection.

9. A pull rope deviation switch according to claim 8, Features: The locking portion comprises: A locking shell is installed through the predetermined position of the housing and connected to an end of the latch seal away from the end cover, and a rod groove is provided through the middle of the locking shell; A pull rod is slidably connected to the locking housing through the rod groove, and one end of the pull rod away from the housing is connected to the end cover; A third sealing ring is provided between the locking housing and the housing; Among them, a locking hole matched with the end of the pull rod is arranged at a predetermined position on the core shaft, which is used to cooperate with the pull rod to lock the core shaft.

10. A pull rope deviation switch according to claim 9, Features: The cross-section of the pull rod located in the rod groove is "convex" shaped, including a narrow portion close to the end cover and a wide portion away from the end cover. A locking spring located outside the narrow portion is connected between the wide portion and the inner wall of the rod groove.

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