Push rod reset structure of explosion-proof knob switch

Abstract

The invention discloses a push rod reset structure of an explosion-proof knob switch, which comprises a switch shell, two push rods are arranged in the switch shell in an up-down sliding manner, and a knob assembly for driving the push rods to slide downwards is rotationally arranged at the upper end of the switch shell; a pair of partition plates is arranged on the inner side wall of the switch shell in a spaced mode, the two push rods are arranged on the two sides of the switch shell in a separated mode through the partition plates, and reset springs are arranged on the lower end faces of the two push rods. The knob assembly comprises a knob body and a pressing head, the knob body drives the pressing head to move back and forth between the two push rods, one corresponding push rod is pressed to slide downwards to compress the reset spring, and the other push rod is driven by the corresponding reset spring to reset. The partition plate avoids mutual friction of the two push rods and solves the problem of interference of the two push rods; the two push rods are independently provided with the reset springs, namely, when the reset springs drive the corresponding push rods to slide upwards, downward sliding of the push rods cannot be affected, and jamming is avoided; and the operation of the explosion-proof knob switch is smoother.

Description

Technical Field

[0001] The invention relates to the technical field of explosion-proof switches, and more particularly to a push rod resetting structure of an explosion-proof knob switch. Background Art

[0002] Explosion-proof switches are mainly used in machinery and equipment in manufacturing plants and system power supply occasions where explosive gas or explosive dust environments may exist, especially external electrical equipment such as motors, pumps, and lighting equipment; process control devices used in dangerous manufacturers and factories; or explosive environments with flammable gases, steam, mist gases or flammable dusts.

[0003] The explosion-proof knob switch rotates the handle to drive the left and right push rods to move up and down repeatedly, pressing the sliding shaft inside the explosion-proof switch movement to move back and forth, thereby enabling the internal contacts of the movement to be powered on and off, thereby realizing the power-on state control of the connected circuit.

[0004] However, the left push rod and the right push rod of the existing explosion-proof knob switch are directly set close to each other and share a return spring, so that when the left push rod and the right push rod move relative to each other, the friction between the two will prevent each other from moving, resulting in mutual interference; and the return spring will directly prevent the side moving downward; causing the left push rod and the right push rod to tilt to one side, resulting in the left push rod and the right push rod not being able to return to their proper position, or even causing a jam. Summary of the invention

[0005] In view of the deficiencies in the prior art, an object of the present invention is to provide a push rod reset structure for an explosion-proof knob switch.

[0006] A push rod reset structure of an explosion-proof knob switch, comprising a switch housing, two push rods are slidably arranged in the switch housing, and a knob assembly is rotatably arranged at the upper end of the switch housing to drive the push rods to slide downward; A pair of partitions are arranged on the inner side wall of the switch housing, and the partitions separate the two push rods and are arranged on both sides of the switch housing. The lower end surfaces of the two push rods are both provided with return springs. The knob assembly includes a knob body and a clamping head. The knob body drives the clamping head to move back and forth between the two push rods, pressing a corresponding push rod to slide downward to compress the return spring, while the other push rod is reset under the drive of the corresponding return spring.

[0007] The present invention further provides that: the lower end surface of the push rod is provided with two return springs, wherein the two return springs are respectively placed at the front and rear ends of the lower end surface of the push rod.

[0008] The present invention further provides that: the front and rear ends of the push rod are both provided with card slots, and the switch housing is provided with four insertion columns; The lower end of the return spring is inserted on the corresponding insertion column, and the upper end is placed in the corresponding clamping groove.

[0009] The present invention further provides that: two guide columns are arranged in the switch housing at intervals, the push rod is provided with guide grooves matched with the guide columns, and the push rod slides up and down under the guidance of the guide columns.

[0010] The present invention further provides that: the guide groove is U-shaped.

[0011] The present invention further provides that: the lower end of the knob body is connected to a push rod, the pressing head is arranged on the outer side wall of the push rod, and the inner side wall of the push rod is inclinedly provided with a pressing surface matching with the pressing head; The pressing head slides along the pressing surface, driving the push rod to slide downward.

[0012] The present invention further provides that: a positioning groove is provided on the lower end of the pressing head, and a positioning protrusion matched with the positioning groove is provided on the upper end of the pressing surface.

[0013] The present invention further provides that: the lower end of the switch housing is provided with a movement through a connector, the outer side wall of the lower end of the switch housing is provided with an annular groove, the upper end of the connector is provided with an installation cavity adapted to the lower end of the switch housing, and the upper end side wall of the connector is provided with at least two latching teeth adapted to the annular groove; The connecting body is sleeved on the lower end of the switch housing, and the latch teeth are matched with the annular groove, so that the connecting body is rotatably arranged on the lower end of the switch housing.

[0014] The present invention further provides that: a plurality of top screw holes are opened on the side wall of the upper end of the connector, wherein the top screws pass through the top screw holes and abut against the outer side wall of the switch housing to fix the connector on the switch housing.

[0015] The present invention further provides that: the number of the top screw holes is two, wherein the two top screw holes are arranged on the connector at intervals.

[0016] The beneficial effects of the present invention are as follows: the two push rods of the explosion-proof knob switch of the present invention are separated on both sides by two partitions of the switch housing, so that when the knob body is rotated to drive the top rod to push one push rod to slide downward, the other push rod slides upward under the drive of the reset spring, that is, during the reverse sliding process of the two push rods, the partition avoids mutual friction between the two push rods, solves the interference problem during the sliding process of the two push rods; ensures that the push rod sliding upward can be reset to its position and correctly controls the power-on status of the equipment; in addition, reset springs are separately arranged at the lower ends of the two push rods, that is, the reset springs operate independently in the process of driving the corresponding push rods to slide upward, and will not affect the push rod sliding downward, avoiding jamming; the operation of the explosion-proof knob switch is smoother and more labor-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a push rod reset structure of an explosion-proof knob switch of the present invention; Figure 2 This is an exploded view of a push rod reset structure of an explosion-proof knob switch of the present invention; Figure 3 This is a diagram of installing a push rod of an explosion-proof push button switch in a switch housing of the present invention; Figure 4 It is a structural schematic diagram of a push rod of an explosion-proof push button switch of the present invention; Figure 5 The structure of the switch housing of an explosion-proof push button switch of the present invention is shown in FIG. Figure 1 ; Figure 6 The structure of the switch housing of an explosion-proof push button switch of the present invention is shown in FIG. Figure 2 ; Figure 7 It is a structural schematic diagram of a switch housing of an explosion-proof push button switch of the present invention; Explanation of the reference numerals in the accompanying drawings: 1. switch housing; 11. partition; 12. insertion column; 13. guide column; 14. annular groove; 2. push rod; 21. return spring; 22. slot; 23. guide groove; 24. pressing surface; 25. positioning protrusion; 3. knob assembly; 31. knob body; 32. push rod; 321. pressing head; 3211. positioning groove; 4. connector; 41. tooth; 42. top screw hole; 5. movement. DETAILED DESCRIPTION

[0018] Refer to the attached Figures 1 to 7 An embodiment of a push rod reset structure of an explosion-proof knob switch of the present invention is further described in detail.

[0019] A push rod reset structure of an explosion-proof knob switch comprises a switch housing 1, two push rods 2 are slidably arranged in the switch housing 1, and a knob assembly 3 is rotatably arranged at the upper end of the switch housing 1 to drive the push rods 2 to slide downward; A pair of partitions 11 are provided on the inner side wall of the switch housing 1, and the partitions 11 separate the two push rods 2 and are arranged on both sides of the switch housing 1. The lower end surfaces of the two push rods 2 are provided with return springs 21; The knob assembly 3 includes a knob body 31 and a pressing head 321. The knob body 31 drives the pressing head 321 to move back and forth between the two push rods 2, pressing a corresponding push rod 2 to slide downward to compress the return spring 21, and the other push rod 2 is reset under the driving of the corresponding return spring 21; The two push rods 2 of the explosion-proof knob switch are separated on both sides by two partitions 11 of the switch housing 1, so that when the knob body 31 is rotated to drive the top rod 32 to push one push rod 2 to slide downward, the other push rod 2 slides upward under the drive of the return spring 21, that is, during the reverse sliding process of the two push rods 2, the partition 11 avoids the mutual friction between the two push rods 2, solves the interference problem during the sliding process of the two push rods 2; ensures that the push rod 2 sliding upward can be reset to its position and correctly control the power-on status of the equipment; in addition, a return spring 21 is separately arranged at the lower end of the two push rods 2, that is, the return spring 21 operates independently in the process of driving the corresponding push rod 2 to slide upward, and does not affect the push rod 2 sliding downward, avoiding the jamming phenomenon; making the operation of the explosion-proof knob switch smoother and more labor-saving.

[0020] The lower end surface of the push rod 2 is provided with two return springs 21, wherein the two return springs 21 are respectively placed at the front and rear ends of the lower end surface of the push rod 2; two return springs 21 are arranged under each push rod 2 to ensure that the push rod 2 can slide upward and return to its position, and at the same time, the two return springs 21 are respectively arranged at the front and rear ends of the lower end surface of the push rod 2, so that the front and rear ends of the push rod 2 are subjected to balanced force to avoid tilting, so that the push rod 2 can slide vertically during the upward sliding process to avoid jamming.

[0021] The front and rear ends of the push rod 2 are both provided with card slots 22, and four insertion columns 12 are provided in the switch housing 1; the lower end of the reset spring 21 is inserted on the corresponding insertion column 12, and the upper end is placed in the corresponding card slot 22, so that the reset spring 21 is stably placed under the push rod 2, thereby improving the structural stability of the explosion-proof knob switch.

[0022] Two guide columns 13 are arranged in intervals in the switch housing 1, and a guide groove 23 matching the guide columns 13 is arranged on the push rod 2. The guide groove 23 is U-shaped. The push rod 2 slides up and down under the guidance of the guide columns 13, so that the push rod 2 can slide vertically in the switch housing 1, thereby ensuring that the knob switch operates more smoothly and stably.

[0023] A clamping head 321 is provided on the outer side wall of the push rod 32, and a clamping surface 24 matching with the clamping head 321 is provided obliquely on the inner side wall of the push rod 2; the clamping head 321 slides along the clamping surface 24 to drive the push rod 2 to slide downward.

[0024] A positioning groove 3211 is provided on the lower end of the clamping head 321, and a positioning protrusion 25 matched with the positioning groove 3211 is provided on the upper end of the clamping surface 24; the positioning groove 3211 cooperates with the positioning protrusion 25 to stabilize the push rod 2 in the pressed position to avoid the automatic switching state of the explosion-proof switch; the lower ends of the two adjacent clamping surfaces 24 are provided with a matching portion matched with the positioning groove 3211, and when the clamping head 321 slides to the matching portion, the positioning groove 3211 cooperates with the two matching portions at the same time, and the two push rods 2 return to their positions at the same time under the action of the corresponding reset springs 21 and return to the initial state.

[0025] The lower end of the switch housing 1 is provided with a movement 5 through a connector 4, an annular groove 14 is provided on the outer side wall of the lower end of the switch housing 1, an installation cavity adapted to the lower end of the switch housing 1 is provided on the upper end of the connector 4, and at least two latch teeth 41 adapted to the annular groove 14 are provided on the upper end side wall of the connector 4; When assembling the explosion-proof knob switch, the connector 4 is sleeved on the lower end of the switch housing 1, and the latch teeth 41 cooperate with the annular groove 14, so that the connector 4 is rotatably disposed on the lower end of the switch housing 1; The movement 5 on the explosion-proof knob switch can be rotated relative to the switch housing 1, so that the direction of the movement 5 can be adjusted; the movement 5 on the explosion-proof knob switch is prevented from interfering with the installation of the equipment; when adjusting the direction of the movement 5, it is only necessary to rotate the connector 4 by hand, and the adjustment operation is convenient and simple; at the same time, the latch tooth 41 will abut against the bottom wall of the annular groove 14 to position the movement 5.

[0026] Two top screw holes 42 are provided on the upper side wall of the connector 4, wherein the two top screw holes 42 are arranged at intervals on the connector 4; wherein the top screw passes through the top screw hole 42 and abuts against the outer side wall of the switch housing 1 to fix the connector 4 on the switch housing 1; that is, after the installation is completed, the connector 4 can be further fixed by passing the top screw through the top screw hole 42 to limit the rotation of the connector 4 relative to the switch housing 1, so that the structural stability of the explosion-proof push button switch is better.

[0027] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A push rod reset structure of an explosion-proof knob switch, characterized by: It comprises a switch housing, in which two push rods are slidably arranged up and down, and a knob assembly is rotatably arranged at the upper end of the switch housing to drive the push rods to slide downward; A pair of partitions are arranged on the inner side wall of the switch housing, and the partitions separate the two push rods and are arranged on both sides of the switch housing. The lower end surfaces of the two push rods are both provided with return springs. The knob assembly includes a knob body and a clamping head. The knob body drives the clamping head to move back and forth between the two push rods, pressing a corresponding push rod to slide downward to compress the return spring, while the other push rod is reset under the drive of the corresponding return spring.

2. The push rod reset structure of an explosion-proof knob switch according to claim 1 is characterized in that: The lower end surface of the push rod is provided with two return springs, wherein the two return springs are respectively placed at the front and rear ends of the lower end surface of the push rod.

3. The push rod reset structure of an explosion-proof knob switch according to claim 2, characterized in that: The front and rear ends of the push rod are both provided with slots, and the switch housing is provided with four insertion columns; The lower end of the return spring is inserted on the corresponding insertion column, and the upper end is placed in the corresponding clamping groove.

4. The push rod reset structure of an explosion-proof knob switch according to claim 1, 2 or 3, characterized in that: Two guide columns are arranged in the switch housing at intervals, and the push rod is provided with guide grooves matched with the guide columns. The push rod slides up and down under the guidance of the guide columns.

5. The push rod reset structure of an explosion-proof knob switch according to claim 4, characterized in that: The guide groove is U-shaped.

6. The push rod reset structure of an explosion-proof knob switch according to claim 1, 2 or 3, characterized in that: The lower end of the knob body is connected to a push rod, the pressing head is arranged on the outer side wall of the push rod, and the inner side wall of the push rod is inclinedly provided with a pressing surface matching the pressing head; The pressing head slides along the pressing surface, driving the push rod to slide downward.

7. The push rod reset structure of an explosion-proof knob switch according to claim 6, characterized in that: A positioning groove is provided on the lower end of the pressing head, and a positioning protrusion matched with the positioning groove is provided on the upper end of the pressing surface.

8. The push rod reset structure of an explosion-proof knob switch according to claim 1, 2 or 3, characterized in that: The lower end of the switch housing is provided with a movement through a connector, an annular groove is provided on the outer side wall of the lower end of the switch housing, an installation cavity adapted to the lower end of the switch housing is provided on the upper end of the connector, and at least two latching teeth adapted to the annular groove are provided on the side wall of the upper end of the connector; The connecting body is sleeved on the lower end of the switch housing, and the latch teeth are matched with the annular groove, so that the connecting body is rotatably arranged on the lower end of the switch housing.

9. The push rod reset structure of an explosion-proof knob switch according to claim 8, characterized in that: A plurality of top screw holes are provided on the side wall at the upper end of the connector, wherein the top screws pass through the top screw holes and abut against the outer side wall of the switch housing to fix the connector on the switch housing.

10. The rotatable installation structure of the movement of the explosion-proof push button switch according to claim 9, characterized in that: The number of the top screw holes is two, wherein the two top screw holes are arranged on the connector at intervals.

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