Combined switch

Abstract

The utility model provides a combined switch. The combined switch comprises a micro switch, a micro switch and an extrusion sleeve, the center of the extrusion sleeve is fixed to the traction mechanism, the two pressing heads are installed on the outer side of the extrusion sleeve at the same height, the microswitch and the microswitch are installed below the two pressing heads respectively, and the installation heights of the microswitch and the microswitch are different. According to the utility model, through the two microswitches with different heights, the switch shaft can output two groups of circuit on-off signals in different strokes.

Description

Technical Field

[0001] The utility model relates to a combined switch. Background Art

[0002] A locking switch achieves its locking function by restraining the switch shaft, keeping it in a certain position. When the device is powered on again, the linkage mechanism retracts the guide shaft to its full travel position. Traditional locking mechanisms, however, rely on a self-locking spring that moves along the trajectory of a cam-mounted lock core to maintain the lock. However, when the locking force exceeds 10N, the self-locking spring and lock core are susceptible to plastic deformation, causing the switch's locking function to fail. When subjected to a force of 50kg, the traditional locking mechanism simply fails. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a combined switch.

[0004] The utility model is achieved through the following technical solutions.

[0005] The utility model provides a combined switch, comprising a K1 microswitch, a K2 microswitch and an extrusion sleeve; the center of the extrusion sleeve is fixed on a traction mechanism, two pressure heads are respectively installed at equal heights on the outside of the extrusion sleeve, the K1 microswitch and the K2 microswitch are respectively installed below the two pressure heads, and the K1 microswitch and the K2 microswitch are installed at different heights.

[0006] The traction mechanism includes a guide shaft, one end of the guide shaft is installed in the connecting shaft, and the other end is installed with a fixed shaft, a locking sleeve is installed between the guide shaft and the fixed shaft, a boss is processed on the outer wall of the guide shaft adjacent to the end of the locking sleeve, the extrusion sleeve is sleeved on the middle of the outer wall of the locking sleeve and locked by a positioning sleeve welded on the outer wall of the locking sleeve, the end of the connecting shaft is processed with an external thread, the middle of the outer wall of the fixed shaft is processed with a groove, and the boss processed in the middle of the inner wall of the locking sleeve is placed in the groove.

[0007] The guide shaft is installed in the guide sleeve, and openings are provided at both ends of the guide sleeve. The guide shaft extends out of the guide sleeve from the opening at one end of the guide sleeve. A limiting boss is provided at the opening of the guide sleeve to cooperate with the boss on the guide shaft. A square hole is processed on the side wall of the guide sleeve, and the pressure head of the extrusion sleeve extends out of the guide sleeve from the square hole.

[0008] The guide sleeve is fixed in the shell, the bottom of the shell is processed to be open, and multiple support plates are installed on the inner wall of the open. The support plates are processed with internal threads, and the cover plate is installed on the support plate by screws. The two ends of the guide sleeve are respectively in contact with the top of the shell and the cover plate, and the contact points are processed with through holes of the same size as the inner diameter of the guide sleeve.

[0009] The guide sleeve is installed on one side of the shell, and two vertical plates are installed on the other side of the shell. The connection line between the two vertical plates and the guide sleeve forms an obtuse triangle. A relay is installed in the shell on the connection line between the two vertical plates. Two strip holes of different heights are processed on the two vertical plates respectively. K1 micro switch and K2 micro switch are fixed in the two strip holes of different heights by bolts respectively. K1 micro switch and K2 micro switch are connected to the relay respectively through wires. The relay is also provided with an external wire passing through the side of the shell.

[0010] A compression spring is also installed on the outer side of the guide sleeve, and a compression spring groove is also processed on the end surface of the extrusion sleeve, and one end of the compression spring extends into the compression spring groove.

[0011] The two pressing heads on the extrusion sleeve are fan-shaped.

[0012] A plurality of mounting plates are fixedly connected to the outer wall of the shell, and through holes are processed on the mounting plates.

[0013] The beneficial effect of the utility model is that, by using two micro switches of different heights, the switch shaft can output two sets of circuit on-off signals when the switch shaft has different strokes. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the utility model;

[0015] Figure 2 This utility model Figure 1 AA cross-sectional structural diagram;

[0016] In the figure: 1-relay, 2-K1 micro switch, 3-K2 micro switch, 4-housing, 5-extrusion sleeve, 6-guide sleeve, 7-fixed shaft, 8-connecting shaft, 9-linkage rod, 10-locking screw, 11-guide shaft, 12-locking sleeve, 13-positioning sleeve, 14-compression spring, 15-cover, 16-bolt, 17-nut, 18-cover fixing screw, 19-relay mounting screw, 20-wire, 21-pressure piece, 22-compression spring groove, 23-vertical plate, 24-support plate, 25-mounting plate. DETAILED DESCRIPTION

[0017] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the described solution.

[0018] A combination switch includes a K1 microswitch 2, a K2 microswitch 3, and an extrusion sleeve 5. The center of the extrusion sleeve 5 is fixed to the traction mechanism. Two pressure heads are installed at the same height on the outside of the extrusion sleeve 5. The K1 microswitch 2 and K2 microswitch 3 are installed below the two pressure heads. The K1 microswitch 2 and K2 microswitch 3 are installed at different heights. The spacing between the top of the K1 microswitch and the extrusion sleeve 5 is 9±0.5mm, and the spacing between the top of the K1 microswitch and the extrusion sleeve 5 is 17±0.5mm. When the guide shaft moves downward, the extrusion sleeve moves downward. When it reaches 9±0.5mm, it squeezes the pressure piece of the K2 microswitch, triggering the K2 microswitch, causing K2 to disconnect. The K2 microswitch remains disconnected during the guide shaft's downward movement. When the guide shaft moves to 17±0.5mm, the pressure piece on the K1 microswitch is squeezed, causing the K1 microswitch to be triggered. When the guide shaft moves downward to 19.5mm,

[0019] The traction mechanism includes a guide shaft 11, one end of which is mounted within the coupling shaft 8 and the other end of which is mounted the fixed shaft 7. A locking sleeve 12 is mounted between the guide shaft 11 and the fixed shaft 7. A boss is machined on the outer wall of the guide shaft 11, adjacent to the end of the locking sleeve 12. The extrusion sleeve 5 is mounted in the middle of the outer wall of the locking sleeve 12 and locked by a positioning sleeve 13 welded to the outer wall of the locking sleeve 12. The end of the coupling shaft 8 is machined with an external thread, and the middle of the outer wall of the fixed shaft 7 is machined with a groove, with the boss machined in the middle of the inner wall of the locking sleeve 12 positioned within the groove. The external thread on the coupling shaft 8 is connected to external equipment.

[0020] The guide shaft 11 is installed in the guide sleeve 6. Both ends of the guide sleeve 6 are provided with openings. The guide shaft 11 extends out of the guide sleeve 6 from the opening at one end of the guide sleeve 6. A limiting boss is provided at the opening of the guide sleeve 6 to cooperate with the boss on the guide shaft 11. A square hole is processed on the side wall of the guide sleeve 6, and the pressure head of the extrusion sleeve 5 extends out of the guide sleeve 6 from the square hole.

[0021] The guide sleeve 6 is fixed within the housing 4. The bottom of the housing 4 is machined to be open, and multiple support plates 24 are mounted on the inner wall of the open opening. The support plates 24 are machined with internal threads. The cover plate 15 is mounted on the support plates 24 with screws. The two ends of the guide sleeve 6 respectively contact the top of the housing 4 and the cover plate 15. The contact points are machined with through holes with the same diameter as the inner diameter of the guide sleeve 6. The upper and lower ends of the guide sleeve 6 are in contact with the housing 4 and the cover plate 16. The housing 4 and the cover plate 16 are tightened by screws to prevent the guide sleeve 6 from moving up and down.

[0022] The guide sleeve 6 is mounted on one side of the housing 4. Two vertical plates 23 are also mounted on the other side of the housing 4. The line connecting the two vertical plates 23 and the guide sleeve 6 forms an obtuse triangle, which increases the utilization of the internal space of the housing 4. A relay 1 is mounted on the line connecting the two vertical plates 23. Two strip-shaped holes of varying heights are machined on each of the vertical plates 23. A K1 microswitch 2 and a K2 microswitch 3 are fixed to the two strip-shaped holes via bolts. The K1 microswitch 2 and the K2 microswitch 3 are connected to the relay 1 via wires. The relay 1 also has external wires extending from the side of the housing 4.

[0023] A compression spring 14 is mounted on the outside of the guide sleeve 6. A compression spring groove 22 is machined into the end surface of the extrusion sleeve 5, into which one end of the compression spring 14 extends. The compression spring 14 fits over the guide sleeve 6, with its upper end positioned within the annular groove of the guide rod 5, preventing uneven force on the guide rod 5. During the locking process, it provides rotational force for the lock teeth, ensuring that the lock teeth 12 rotate into position.

[0024] The two pressing heads on the extrusion sleeve 5 are fan-shaped.

[0025] A plurality of mounting plates 25 are fixedly connected to the outer wall of the housing 4, and through holes are machined on the mounting plates 25.

[0026] As a further solution to reduce wear, the matching surfaces of the guide sleeve 6, the guide shaft 11, and the lock teeth 12 are specially sprayed to reduce the friction coefficient and increase the wear resistance.

[0027] As a further solution to ensure reliability, the guide sleeve 6, guide shaft 11, and lock tooth 12 are made of TC4 material, which can meet the traction force of 50kg.

[0028] As a further solution to ensure reliability, the connecting shaft 8 limits the axial position of the positioning rod 10 to prevent the positioning rod 10 from interfering with the guide shaft 11.

Claims

1. A combined switch comprising a K1 micro switch (2), a K2 micro switch (3) and an extrusion sleeve (5), characterized in that: The center of the extrusion sleeve (5) is fixed on the traction mechanism, and two pressure heads are respectively installed at the same height on the outside of the extrusion sleeve (5). The K1 micro switch (2) and the K2 micro switch (3) are respectively installed below the two pressure heads, and the installation heights of the K1 micro switch (2) and the K2 micro switch (3) are different.

2. The combination switch according to claim 1, wherein: The traction mechanism comprises a guide shaft (11), one end of the guide shaft (11) is installed in the connecting shaft (8), and the other end is installed with a fixed shaft (7), a locking sleeve (12) is installed between the guide shaft (11) and the fixed shaft (7), a boss is processed on the outer wall of the guide shaft (11) adjacent to the end of the locking sleeve (12), the extrusion sleeve (5) is sleeved on the middle part of the outer wall of the locking sleeve (12) and is locked by a positioning sleeve (13) welded on the outer wall of the locking sleeve (12), the end of the connecting shaft (8) is processed with an external thread, the middle part of the outer wall of the fixed shaft (7) is processed with a groove, and the boss processed on the middle part of the inner wall of the locking sleeve (12) is placed in the groove.

3. The combination switch according to claim 2, wherein: The guide shaft (11) is installed in the guide sleeve (6). Both ends of the guide sleeve (6) are provided with openings. The guide shaft (11) extends out of the guide sleeve (6) from the opening at one end of the guide sleeve (6). A limiting boss is provided at the opening of the guide sleeve (6) to cooperate with the boss on the guide shaft (11). A square hole is processed on the side wall of the guide sleeve (6). The pressure head of the extrusion sleeve (5) extends out of the guide sleeve (6) from the square hole.

4. The combined switch according to claim 3, wherein: The guide sleeve (6) is fixed in the housing (4). The bottom of the housing (4) is processed to be open. A plurality of support plates (24) are installed on the inner wall of the open. The support plates (24) are processed with internal threads. The cover plate (15) is installed on the support plate (24) by screws. The two ends of the guide sleeve (6) are respectively in contact with the top of the housing (4) and the cover plate (15), and the contact points are both processed with through holes with the same size as the inner diameter of the guide sleeve (6).

5. The combined switch according to claim 4, wherein: The guide sleeve (6) is installed on one side of the housing (4), and two vertical plates (23) are installed on the other side of the housing (4). The connection line between the two vertical plates (23) and the guide sleeve (6) forms an obtuse triangle. The connection line between the two vertical plates (23) is also provided. A relay (1) is installed in the housing (4), and two strip holes of different heights are respectively processed on the two vertical plates (23). A K1 micro switch (2) and a K2 micro switch (3) are respectively fixed in the two strip holes of different heights by bolts. The K1 micro switch (2) and the K2 micro switch (3) are respectively connected to the relay (1) through wires. The relay (1) is also provided with an external wire passing through the side of the housing (4).

6. The combined switch according to claim 5, wherein: A compression spring (14) is also installed on the outer side of the guide sleeve (6), and a compression spring groove (22) is also processed on the end surface of the extrusion sleeve (5), and one end of the compression spring (14) extends into the compression spring groove (22).

7. The combined switch according to claim 6, wherein: The two pressing heads on the extrusion sleeve (5) are fan-shaped.

8. The combined switch according to claim 4, wherein: A plurality of mounting plates (25) are also fixedly connected to the outer wall of the housing (4), and through holes are machined on the mounting plates (25).

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