Angular travel limit switch

Abstract

The utility model discloses an angular travel limit switch, which relates to the technical field of electrical equipment and comprises a top cover, a slotted hole is formed in the top of the top cover in a penetrating manner, a rotating shaft is rotatably connected to the inner side of the slotted hole, a limit strip is fixedly mounted on one side of the rotating shaft, and a roller assembly is rotatably connected to one side of the limit strip. An extrusion block is fixedly installed at the bottom of the rotating shaft, a limiting stick is fixedly installed at the bottom of the top cover, a limiting block is fixedly installed at the bottom of the top cover, a first limiting hole is formed in the outer side of the limiting block in a penetrating mode, and a shell is installed at the bottom of the top cover in an inserted mode. According to the angular travel limit switch, through the cooperation of a limiting rod and a first limiting groove, after the top cover is taken up, the limiting rod can be inserted into the first limiting groove, so that the top cover and the shell can be rapidly positioned, and meanwhile, through the cooperation of a limiting block and a second limiting groove, the top cover can be limited; the top cover is prevented from deviating in the horizontal direction during installation or use, and the stability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, in particular to an angular travel limit switch. Background Art

[0002] In daily work and life, for safety reasons, mechanical equipment often needs to be protected by limit switches. The most commonly used limit switch, also known as a travel switch, can be installed on a relatively stationary object. When an animal approaches the stationary object, the drive object is triggered, the contacts are closed, and the circuit is closed to limit the position and travel of the mechanical movement, so that the moving machine can automatically stop, reverse, change speed, or automatically reciprocate at a certain position or travel.

[0003] China Utility Model Patent Publication No.: CN 213635743 U, discloses: a travel limit switch, which, when in use, when a moving object collides with a contact, causes the contact to slide inside the contact limit cylinder, and when the contact slides, friction is generated with the surface of an oil-filled movable ball to drive it to roll, and when the oil-filled movable ball rolls, the lubricating oil stored in the oil storage cotton block is brought out through the surface of the oil-filled movable ball and smeared on the contact, which can ensure the lubrication effect of the sliding of the contact and reduce the occurrence of jamming failures. However, the travel limit switch is reinforced and connected by screws and bolts, which is complicated to operate, inconvenient for subsequent disassembly and maintenance, and has poor practicality. Utility Model Content

[0004] The utility model aims to provide an angular travel limit switch, which can solve the problem that the switch proposed in the above background technology is complicated to operate when being reinforced and connected, and is inconvenient for subsequent disassembly, assembly and maintenance.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an angular travel limit switch, comprising a top cover, a slot hole is penetrated on the top of the top cover, a rotating shaft is rotatably connected to the inner side of the slot hole, a limiting strip is fixedly installed on one side of the rotating shaft, a roller assembly is rotatably connected to one side of the limiting strip, an extrusion block is fixedly installed on the bottom of the rotating shaft, a limiting rod is fixedly installed on the bottom of the top cover, a limiting block is fixedly installed on the bottom of the top cover, a limiting hole is penetrated on the outer side of the limiting block, a shell is plugged and installed on the bottom of the top cover, a limiting slot is provided on the outer top of the shell, and a limiting slot is provided on the outer top of the shell. Slot 2, a limiting hole 2 is penetrated through the outer side of the shell, a pin is installed in the inner side of the limiting hole 2, a circuit hole is opened on one side of the shell, a mounting block is fixedly installed on the outer side of the shell, a threaded hole is penetrated through the top of the mounting block, a bolt is threadedly connected to the inner side of the threaded hole, a moving block is slidably connected to the inner side of the shell, a moving bar is fixedly installed on one side of the moving block, connecting contacts are arranged at both ends of the moving bar, a spring is arranged on the side of the moving bar away from the extrusion block, a normally open contact is arranged on the inner side of the shell, a normally closed contact is arranged on the inner side of the shell, and a ground contact is arranged on the inner side of the shell.

[0006] Preferably, the cross section of the roller assembly is an I-shaped structure, and the roller assembly is located on a side of the limiting strip away from the rotating shaft.

[0007] Preferably, the limiting rod is installed by plugging into the first limiting groove, and the limiting block is installed by plugging into the second limiting groove.

[0008] Preferably, the latch passes through the first limiting hole and the second limiting hole and extends to the inner side of the shell, and the latch has a "cylindrical" structure.

[0009] Preferably, the circuit holes are provided in a number of five, the five circuit holes are equidistantly distributed at the rear end of the shell, and the ground wire contact is located at the bottom of the inner side of the shell.

[0010] Preferably, the mounting blocks, threaded holes and bolts are provided in equal numbers, and the mounting blocks, threaded holes and bolts are evenly distributed at the bottom of the left and right sides of the shell.

[0011] Preferably, the extrusion block has a "semicircular" structure, the normally open contact is located on the side of the connecting contact close to the moving block, the normally closed contact is located on the side of the connecting contact away from the moving block, and the other end of the spring away from the moving bar is fixedly mounted on the shell.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model can limit the shell and the top cover by cooperating with the latch, the limit hole one and the limit hole two, so as to prevent the top cover from being displaced in the vertical direction during installation or use, thereby improving the stability of the overall structure. At the same time, the locking structure of the latch is easy to operate, and is convenient for subsequent disassembly and maintenance of the instrument, thereby improving practicality. By providing a ground contact, it can effectively avoid leakage of equipment after the ground wire is provided, and prevent affecting normal operation, while ensuring the life safety of the staff and improving safety. By providing a plurality of mounting blocks, threaded holes and bolts, the limit switch can be easily installed with other structures, so that the limit switch can cope with more complex use environments and requirements, thereby improving practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The three-dimensional structure of the utility model is shown in FIG. Figure 1 ;

[0015] Figure 2 The three-dimensional structure of the utility model is shown in FIG. Figure 2 ;

[0016] Figure 3 This is a schematic diagram of the installation structure of the rotating shaft and the top cover of the utility model;

[0017] Figure 4 This is a schematic diagram of the installation structure of the extrusion block and the shell of the utility model;

[0018] Figure 5 This is a schematic diagram of the installation structure of the top cover and shell of the utility model.

[0019] Among them: 1. Top cover; 2. Slot hole; 3. Rotating shaft; 4. Limiting bar; 5. Roller assembly; 6. Extrusion block; 7. Limiting stick; 8. Limiting block; 9. Limiting hole 1; 10. Shell; 11. Limiting slot 1; 12. Limiting slot 2; 13. Limiting hole 2; 14. Pin; 15. Line hole; 16. Mounting block; 17. Threaded hole; 18. Bolt; 19. Moving block; 20. Moving bar; 21. Connecting contact; 22. Spring; 23. Normally open contact; 24. Normally closed contact; 25. Ground contact. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Example 1

[0022] See also Figure 1-5 In the figure, an angular travel limit switch comprises a top cover 1, a slot hole 2 is provided on the top of the top cover 1, a rotating shaft 3 is rotatably connected to the inner side of the slot hole 2, a limiting strip 4 is fixedly installed on one side of the rotating shaft 3, a roller assembly 5 is rotatably connected to one side of the limiting strip 4, an extrusion block 6 is fixedly installed on the bottom of the rotating shaft 3, a limiting rod 7 is fixedly installed on the bottom of the top cover 1, a limiting block 8 is fixedly installed on the bottom of the top cover 1, a limiting hole 9 is provided on the outer side of the limiting block 8, a shell 10 is plugged and installed on the bottom of the top cover 1, a limiting slot 11 is provided on the outer top of the shell 10, a limiting slot 2 12 is provided on the outer top of the shell 10, and a limiting hole 12 is provided on the outer side of the shell 10 3. A plug 14 is installed on the inner side of the second limiting hole 13, a circuit hole 15 is opened on one side of the shell 10, a mounting block 16 is fixedly installed on the outer side of the shell 10, a threaded hole 17 is penetrated through the top of the mounting block 16, a bolt 18 is threadedly connected to the inner side of the threaded hole 17, a moving block 19 is slidably connected to the inner side of the shell 10, a moving bar 20 is fixedly installed on one side of the moving block 19, connecting contacts 21 are arranged at both ends of the moving bar 20, a spring 22 is arranged on the side of the moving bar 20 away from the extrusion block 6, a normally open contact 23 is arranged on the inner side of the shell 10, a normally closed contact 24 is arranged on the inner side of the shell 10, and a ground contact 25 is arranged on the inner side of the shell 10.

[0023] See also Figure 1-5 In the figure, the cross section of the roller assembly 5 is an “I”-shaped structure, and the roller assembly 5 is located on the side of the limiting strip 4 away from the rotating shaft 3.

[0024] In the present embodiment: by setting the roller assembly 5, when the limit bar 4 is triggered, the roller assembly 5 assists the limit bar 4 to rotate through its own rotation, and at the same time protects the limit bar 4, to a certain extent alleviates the wear of the limit bar 4 during frequent use, and extends the service life of the limit bar 4.

[0025] Working principle: When installing the limit switch, after picking up the top cover 1, the limit stick 7 can be inserted into the inner side of the limit slot 1 11, and the limit block 8 can be inserted into the inner side of the limit slot 2 12, so that the top cover 1 and the shell 10 can be quickly positioned, and the top cover 1 can be limited at the same time. After picking up the latch 14, the latch 14 is inserted into the limit hole 1 9 on the top cover 1 and the limit hole 2 13 on the shell 10, and extends to the inside of the shell 10, so that the shell 10 and the top cover 1 can be limited, so as to install the limit switch. The provided mounting block 16, threaded hole 17 and bolt 18 make it easy to install the limit switch with other structures. When wiring the contacts, the circuit Insert it into the line hole 15 to classify multiple wires, and then connect the multiple lines with the normally open contact 23, the normally closed contact 24, and the ground contact 25 to make the circuit work normally. When the limit switch is working, the limit bar 4 is triggered, and the extrusion block 6 is driven to rotate through the rotating shaft 3. The longer side of the extrusion block 6 is fitted with the moving block 19, so that the moving block 19, the moving bar 20 and the connecting contact 21 move backward until the connecting contact 21 contacts the normally closed contact 24. At this time, the circuit is disconnected, and when the limit bar 4 is no longer triggered, the moving bar 20 moves forward by the reaction force of the spring 22, so that the connecting contact 21 contacts the normally open contact 23. At this time, the circuit operates normally and the limit bar 4 is reset.

[0026] Example 2

[0027] See also Figure 3-5 This embodiment further illustrates Example 1. In the figure, the limit rod 7 and the limit groove 1 1 are plug-in installed, and the limit block 8 and the limit groove 2 12 are plug-in installed.

[0028] In the present embodiment: by cooperating with the limit stick 7, limit groove 1 11, limit block 8 and limit groove 2 12, after picking up the top cover 1, the limit stick 7 can be inserted into the inner side of the limit groove 1 1, and the limit block 8 can be inserted into the inner side of the limit groove 2 12, so that the top cover 1 and the shell 10 can be quickly positioned, and the top cover 1 can be limited at the same time to prevent the top cover 1 from shifting in the horizontal direction during installation or use, thereby improving stability.

[0029] See also Figure 1-5 In the figure, the latch 14 passes through the limiting hole 1 9 and the limiting hole 2 13 and extends to the inner side of the housing 10. The latch 14 is a "cylindrical" structure.

[0030] In this embodiment: by cooperating with the provided latch 14, the limiting hole 19 and the limiting hole 2 13, after picking up the latch 14, the latch 14 is inserted into the limiting hole 19 on the top cover 1 and the limiting hole 2 13 on the shell 10, and extends to the inside of the shell 10, so as to limit the shell 10 and the top cover 1 to prevent the top cover 1 from being displaced in the vertical direction during installation or use, thereby further improving the stability of the overall structure. At this time, the latch 14 is pulled out to unlock the shell 10 and the top cover 1, which is easy to operate, convenient for subsequent disassembly and maintenance of the instrument, and improves practicality.

[0031] See also Figure 2-5 In the figure, there are five identical circuit holes 15 , which are evenly distributed at the rear end of the housing 10 , and the ground contact 25 is located at the bottom of the inner side of the housing 10 .

[0032] In this embodiment: by setting up multiple line holes 15, when wiring the contacts, multiple wires can be classified through the line holes 15, and in conjunction with the grounding contacts 25, after the grounding wires are connected, the current can be conducted underground, thereby effectively preventing leakage, protecting the personal safety of workers, and improving practicality and safety.

[0033] See also Figure 1-5 In the figure, the same number of mounting blocks 16, threaded holes 17 and bolts 18 are provided, and the plurality of mounting blocks 16, threaded holes 17 and bolts 18 are evenly distributed at the bottom of the left and right sides of the housing 10.

[0034] In this embodiment, the installation block 16, the threaded hole 17 and the bolt 18 are matched to make the limit switch easy to be installed with other structures, so that the limit switch can cope with more complex use environments and requirements, thereby improving practicality.

[0035] See also Figure 3-5 In the figure, the extrusion block 6 is in a "semicircular" structure, the normally open contact 23 is located on the side of the connecting contact 21 close to the moving block 19, the normally closed contact 24 is located on the side of the connecting contact 21 away from the moving block 19, and the other end of the spring 22 away from the moving bar 20 is fixedly installed with the housing 10.

[0036] In this embodiment: by setting the moving block 19, moving bar 20 and spring 22, when the limit bar 4 is triggered, the extrusion block 6 is driven to rotate through the rotating shaft 3, and the longer side of the extrusion block 6 is fitted with the moving block 19, so that the moving block 19, the moving bar 20 and the connecting contact 21 move backward until the connecting contact 21 contacts the normally closed contact 24, and the circuit is disconnected at this time. When the limit bar 4 is no longer triggered, the moving bar 20 moves forward under the reaction force of the spring 22, so that the connecting contact 21 contacts the normally open contact 23. At this time, the circuit operates normally, the limit bar 4 is reset, and the circuit is disconnected and connected by repeatedly triggering the limit bar 4, thereby achieving the effect of the limit switch.

[0037] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include"-"comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process-method-article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process-method-article or device.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An angular travel limit switch, comprising a top cover (1), characterized in that: The top of the top cover (1) is provided with a slot hole (2) through-through, the inner side of the slot hole (2) is rotatably connected to a rotating shaft (3), a limiting strip (4) is fixedly installed on one side of the rotating shaft (3), a roller assembly (5) is rotatably connected to one side of the limiting strip (4), an extrusion block (6) is fixedly installed on the bottom of the rotating shaft (3), a limiting rod (7) is fixedly installed on the bottom of the top cover (1), a limiting block (8) is fixedly installed on the bottom of the top cover (1), a limiting hole (9) is penetrated through the outer side of the limiting block (8), a shell (10) is plugged and installed on the bottom of the top cover (1), a limiting groove (11) is provided on the outer top of the shell (10), a limiting groove (12) is provided on the outer top of the shell (10), a limiting hole (13) is penetrated through the outer side of the shell (10), and the limiting hole (13) is penetrated through the outer side of the shell (10). ) is plugged and installed on the inner side of the housing (10), a circuit hole (15) is opened on one side of the housing (10), a mounting block (16) is fixedly installed on the outer side of the housing (10), a threaded hole (17) is penetrated through the top of the mounting block (16), a bolt (18) is threadedly connected to the inner side of the threaded hole (17), a moving block (19) is slidably connected to the inner side of the housing (10), a moving bar (20) is fixedly installed on one side of the moving block (19), connecting contacts (21) are arranged at both ends of the moving bar (20), a spring (22) is arranged on the side of the moving bar (20) away from the extrusion block (6), a normally open contact (23) is arranged on the inner side of the housing (10), a normally closed contact (24) is arranged on the inner side of the housing (10), and a ground contact (25) is arranged on the inner side of the housing (10).

2. The angular travel limit switch according to claim 1, characterized in that: The cross section of the roller assembly (5) is in the shape of an I-shaped structure, and the roller assembly (5) is located on a side of the limiting strip (4) away from the rotating shaft (3).

3. The angular travel limit switch according to claim 2, characterized in that: The limiting rod (7) and the limiting groove 1 (11) are plug-in mounted, and the limiting block (8) and the limiting groove 2 (12) are plug-in mounted.

4. The angular travel limit switch according to claim 3, characterized in that: The latch (14) passes through the first limiting hole (9) and the second limiting hole (13) and extends to the inner side of the housing (10); the latch (14) is a "cylindrical" structure.

5. The angular travel limit switch according to claim 4, characterized in that: The circuit holes (15) are provided in five identical numbers, and the five circuit holes (15) are evenly distributed at the rear end of the housing (10), and the ground wire contact (25) is located at the bottom of the inner side of the housing (10).

6. The angular travel limit switch according to claim 5, characterized in that: The mounting blocks (16), threaded holes (17) and bolts (18) are provided in equal numbers, and the mounting blocks (16), threaded holes (17) and bolts (18) are evenly distributed at the bottom of the left and right sides of the housing (10).

7. The angular travel limit switch according to claim 6, characterized in that: The extrusion block (6) has a "semicircular" structure, the normally open contact (23) is located on the side of the connection contact (21) close to the moving block (19), the normally closed contact (24) is located on the side of the connection contact (21) away from the moving block (19), and the other end of the spring (22) away from the moving bar (20) is fixedly mounted on the housing (10).

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