Exquisite limit switch

Abstract

The utility model discloses an exquisite limit switch, which belongs to the technical field of limit switches and is characterized in that one end of a limit switch body is provided with a boss, the center of the boss is provided with a rotatable rotating shaft, two ends of the rotating shaft are respectively provided with a lower connecting rod and an upper connecting rod, and the surface of the upper connecting rod is sleeved with a mounting sleeve; a bolt is inserted into the side face of the mounting sleeve, a supporting arm is arranged on the surface of the mounting sleeve, a sliding groove is formed in the surface of the supporting arm, and a sliding rod is slidably connected to the inner wall of the sliding groove. According to the limiting switch, the application range of the limiting switch is greatly widened, the cylindrical limiting switch body, the end cover and the mounting hole are arranged, assembly and positioning of the limiting switch are facilitated, the occupied position area of the limiting switch can be greatly reduced through the structure, and the limiting switch is made to be more exquisite.

Description

Technical Field

[0001] The utility model relates to the technical field of limit switches, and more specifically, to a delicate limit switch. Background Art

[0002] A limit switch is a small-current master electrical appliance that uses the collision of the moving parts of a production machine to make its contacts act to achieve the on or off control circuit and reach a certain control purpose. With the development of technology, the design of the limit switch is getting smaller and smaller. However, due to the limitation of its stroke position, the application range of the limit switch is small, and the occupied position area of the limit switch base cannot be reduced.

[0003] For example, a limit switch disclosed in the patent publication No. CN219916954U includes: a rotating shaft; a switch bracket with a plurality of clamping grooves formed thereon, and the switch bracket is fixedly connected to the rotating shaft; a touch component disposed in one of the plurality of clamping grooves; a contact switch with at least two contact switches symmetrically disposed on both sides of the rotating shaft, and the rotating shaft drives the touch component to abut against the contact switch.

[0004] It can be seen from the above disclosed solution that the rotating shaft drives the touch component to abut against the contact switch. Within a limited range, its limit stroke is small. When different strokes are required, this limit switch is not applicable. Moreover, since the limit switch is fixed by screws, the maximum area of its upper shell and lower shell cannot be reduced, and the limit switch cannot be made more delicate. Summary of the Utility Model

[0005] Aiming at the problems existing in the prior art, the purpose of the utility model is to provide a delicate limit switch. By providing a support arm, a chute and a spiral stroke groove, the limit stroke can be increased within a limited range, greatly improving the application range of the limit switch. In addition, the provided cylindrical limit switch body, end cover and mounting holes not only facilitate the assembly and positioning of the limit switch, but also can greatly reduce the occupied position area of the limit switch, making the limit switch more delicate.

[0006] To solve the above problems, the utility model adopts the following technical solutions.

[0007] A delicate limit switch, comprising a limit switch body, one end of the limit switch body is provided with a boss, a rotatable shaft is arranged at the center position of the boss, a lower connecting rod and an upper connecting rod are respectively arranged at both ends of the shaft, an installation sleeve is sleeved on the surface of the upper connecting rod, a bolt is inserted into the side surface of the installation sleeve, a support arm is arranged on the surface of the installation sleeve, a chute is arranged on the surface of the support arm, a sliding rod is slidably connected to the inner wall of the chute, a limit sleeve is detachably connected to one end of the sliding rod, a touch block is fixedly connected to the other end of the sliding rod, a touch head is arranged at one end of the touch block, a travel groove is slidably connected to the surface of the touch head, a contact switch with a replaceable position is arranged at the bottom of the travel groove, mounting holes are arranged on the surfaces of the limit switch body and the boss, an end cover is threadedly connected to the surface of the boss, a transparent plate is arranged on the surface of the end cover, and an anti-slip strip is arranged on the side surface of the end cover. For this delicate limit switch, by setting the support arm, the chute and the spiral travel groove, the limit travel can be increased within a limited range, greatly improving the applicable range of the limit switch. Moreover, by setting the cylindrical limit switch body, the end cover and the mounting holes, it is not only convenient for the assembly and positioning of the limit switch, but also this structure can greatly reduce the occupied position area of the limit switch, making the limit switch more delicate.

[0008] Further, a clearance groove is arranged at the bottom of the end cover, the depth dimension of the clearance groove is greater than the total dimension of the height of the boss plus the length of the upper connecting rod extending out of the end face of the boss, and internal threads are arranged on the inner wall of the side surface of the clearance groove. The clearance groove is convenient for shielding the boss, the upper connecting rod, the installation sleeve, the support arm and the touch block, increasing the external beauty.

[0009] Further, the cross-sectional shapes of both the lower connecting rod and the upper connecting rod are polygonal, through holes are arranged on the side surfaces of the lower connecting rod and the upper connecting rod, and the inner walls of the through holes are in contact connection with the surface of the bolt, which is convenient for the connection at both ends of the shaft rod.

[0010] Further, the travel groove is spiral, the cross-sectional shape of the travel groove is arc-shaped, and the shape of the touch head is hemispherical. The touch head can move along the travel groove and has the function of limit guiding.

[0011] Further, a sleeve hole is arranged at the center position of the installation sleeve, the shape of the sleeve hole is polygonal, and a bolt hole is arranged on the side surface of the installation sleeve.

[0012] Further, the shape of the boss is cylindrical, and external threads are arranged on the inner wall of the side surface of the boss, which is convenient for the manual installation and disassembly of the end cover.

[0013] Further, the mounting hole is a countersunk hole penetrating through the axis, which is convenient for the insertion of the screw, so that the screw is inside the limit switch, not only concealed, but also reducing the outer diameter of the limit switch.

[0014] Compared with the prior art, the advantages of the present utility model are as follows:

[0015] (1) By providing the support arm, the chute and the spiral travel groove, the limit travel can be increased within a limited range, greatly improving the applicable range of the limit switch.

[0016] (2) The cylindrical limit switch body, the end cover and the mounting holes provided in this solution not only facilitate the assembly and positioning of the limit switch, but also this structure can greatly reduce the occupied position area of the limit switch, making the limit switch more delicate. Description of the Drawings

[0017] Figure 1 is a three-dimensional view of the overall structure of the present utility model;

[0018] Figure 2 is Figure 1 a top view of the structure of the limit switch body of

[0019] Figure 3 is Figure 2 a bottom view of the structure of the touch block of

[0020] Figure 4 is Figure 1 a bottom view of the structure of the end cover of

[0021] Explanation of the reference numerals in the drawings:

[0022] 1 limit switch body, 11 boss, 12 travel groove, 13 contact switch, 14 mounting hole, 2 rotating shaft, 21 lower connecting rod, 22 through hole, 23 upper connecting rod, 24 bolt, 3 mounting sleeve, 31 support arm, 32 chute, 4 touch block, 41 touch head, 42 sliding rod, 43 limit sleeve, 5 end cover, 51 clearance groove, 52 transparent plate, 53 anti-slip strip. Detailed Embodiment

[0023] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0024] Embodiment 1

[0025] Please refer to Figures 1-4, A delicate limit switch, including a limit switch body 1. Inside the limit switch body 1, there are also components such as a limit switch control circuit. Its composition structure and working principle are well-known to those skilled in the art and will not be described in detail here. One end of the limit switch body 1 is provided with a boss 11. At the central position of the boss 11, there is a rotatable rotating shaft 2. The rotating shaft 2 can rotate clockwise and counterclockwise. At both ends of the rotating shaft 2, there are respectively a lower connecting rod 21 and an upper connecting rod 23. A mounting sleeve 3 is sleeved on the surface of the upper connecting rod 23. A bolt 24 is inserted into the side of the mounting sleeve 3. A support arm 31 is provided on the surface of the mounting sleeve 3. A chute 32 is provided on the surface of the support arm 31. A sliding rod 42 is slidably connected to the inner wall of the chute 32. One end of the sliding rod 42 is detachably connected to a limit sleeve 43. The other end of the sliding rod 42 is fixedly connected to a touch block 4. One end of the touch block 4 is provided with a touch head 41. The touch head 41 is slidably connected to a travel groove 12. The travel groove 12 enables the touch head 41 to move along the length direction of the support arm 31 while rotating with the support arm 31. At the bottom of the travel groove 12, there are two replaceable-position contact switches 13. The contact switches 13 can be set at different positions in the travel groove 12 according to actual needs, thereby controlling the travel of the touch block 4. Mounting holes 14 are provided on the surfaces of the limit switch body 1 and the boss 11. The mounting holes 14 are countersunk holes that penetrate through the axis, facilitating the insertion of screws, so that the screws are inside the limit switch, which is not only concealed but also reduces the outer diameter of the limit switch. The surface of the boss 11 is threadedly connected with an end cover 5. The shape of the boss 11 is cylindrical. External threads are provided on the inner wall of the side of the boss 11, facilitating the manual installation and disassembly of the end cover 5. A transparent plate 52 is provided on the surface of the end cover 5. Anti-slip strips 53 are provided on the side of the end cover 5.

[0026] A clearance groove 51 is provided at the bottom of the end cover 5. The depth dimension of the clearance groove 51 is greater than the total dimension of the height of the boss 11 plus the length of the upper connecting rod 23 extending out of the end face of the boss 11. Internal threads are provided on the inner wall of the side of the clearance groove 51. The clearance groove 51 facilitates shielding the boss 11, the upper connecting rod 23, the mounting sleeve 3, the support arm 31, and the touch block 4, increasing the external beauty. The cross-sectional shapes of both the lower connecting rod 21 and the upper connecting rod 23 are polygonal. Through holes 22 are provided on the sides of both the lower connecting rod 21 and the upper connecting rod 23. The inner wall of the through hole 22 is in contact connection with the surface of the bolt 24, facilitating the connection of both ends of the shaft rod.

[0027] The travel groove 12 is spiral. The cross-sectional shape of the travel groove 12 is arc-shaped. The shape of the touch head 41 is hemispherical. The touch head 41 can move along the travel groove 12, having a limit guiding function. A sleeve hole is provided at the central position of the mounting sleeve 3. The shape of the sleeve hole is polygonal. Bolt holes are provided on the side of the mounting sleeve 3.

[0028] When the delicate limit switch is in use, the rotation of the rotating shaft 2 drives the rotating sleeve 3 to rotate. The rotation of the rotating sleeve 3 drives the support arm 31 to rotate. The rotation of the support arm 31 drives the contact block 4 to move along the spiral travel groove 12. At the same time, as the contact block 4 moves along the spiral travel groove 12, the slide bar 42 slides along the slide groove 32. When the contact head 41 contacts the contact switch 13 during the movement process, the on-off control circuit is realized to achieve the control purpose. By setting the support arm 31, the slide groove 32 and the spiral travel groove 12, the limit travel can be increased within a limited range, greatly improving the applicable range of the limit switch. Moreover, by setting the cylindrical limit switch body 1, the end cover 5 and the mounting hole 14, it is not only convenient for the assembly and positioning of the limit switch, but also this structure can greatly reduce the occupied position area of the limit switch, making the limit switch more delicate.

[0029] The above is only the preferred specific embodiment of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, makes equivalent substitution or change, and should be covered within the protection scope of the present invention.

Claims

1. A compact limit switch, comprising a limit switch body (1), characterized in that: A boss (11) is provided at one end of the limit switch body (1), a rotatable shaft (2) is provided at the center of the boss (11), a lower connecting rod (21) and an upper connecting rod (23) are provided at both ends of the shaft (2), a mounting sleeve (3) is sleeved on the surface of the upper connecting rod (23), a bolt (24) is inserted on the side of the mounting sleeve (3), a support arm (31) is provided on the surface of the mounting sleeve (3), a slide groove (32) is provided on the surface of the support arm (31), a slide rod (42) is slidably connected to the inner wall of the slide groove (32), and one end of the slide rod (42) is detachable. A limit sleeve (43) is connected, the other end of the slide rod (42) is fixedly connected to a touch block (4), one end of the touch block (4) is provided with a touch head (41), the surface of the touch head (41) is slidably connected to a travel groove (12), the bottom of the travel groove (12) is provided with a contact switch (13) with a replaceable position, the surfaces of the limit switch body (1) and the boss (11) are provided with mounting holes (14), the surface of the boss (11) is connected to an end cover (5) by a thread, the surface of the end cover (5) is provided with a transparent plate (52), and the side of the end cover (5) is provided with an anti-slip strip (53).

2. A compact limit switch according to claim 1, characterized in that: A clearance groove (51) is provided at the bottom of the end cover (5), the depth of the clearance groove (51) being greater than the total dimension of the height of the boss (11) plus the length of the upper connecting rod (23) extending out of the end face of the boss (11), and an internal thread is provided on the inner wall of the side of the clearance groove (51).

3. A compact limit switch according to claim 1, characterized in that: The cross-sectional shapes of the lower connecting rod (21) and the upper connecting rod (23) are both polygonal, and the sides of the lower connecting rod (21) and the upper connecting rod (23) are both provided with through holes (22), and the inner walls of the through holes (22) are in contact with the surfaces of the bolts (24).

4. A compact limit switch according to claim 1, characterized in that: The travel groove (12) is spiral-shaped, the cross-sectional shape of the travel groove (12) is arc-shaped, and the shape of the contact head (41) is hemispherical.

5. A compact limit switch according to claim 1, characterized in that: A sleeve hole is provided at the center of the installation sleeve (3), the shape of the sleeve hole is polygonal, and bolt holes are provided on the side of the installation sleeve (3).

6. A compact limit switch according to claim 1, characterized in that: The boss (11) is cylindrical in shape, and the inner wall of the side surface of the boss (11) is provided with an external thread.

7. A compact limit switch according to claim 1, characterized in that: The mounting hole (14) is a countersunk hole through which the axis passes.

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