A thermal protector with a protective structure

Abstract

The present invention relates to the technical field of thermal protectors, and in particular to a thermal protector with a protective structure, comprising a thermal protector body and two wires, wherein the outer sleeve of the thermal protector body is provided with an outer shell, the front end of the outer shell is provided with a front cover, a pre-tightening opening is provided on the front cover, the cross section of the pre-tightening opening is gradually retracted from the inside of the front cover to the outside of the front cover, the outer fixed sleeve of the wire is provided with a pre-tightening part which matches the inner shape of the pre-tightening opening, when the wire moves toward the outside of the front cover, the pre-tightening part moves accordingly and abuts against the inner wall of the pre-tightening opening, a first clamping block which can simultaneously clamp the outside of the two wires is provided at the center of one side of the inner part of the front cover away from the pre-tightening opening, a linkage mechanism is provided between the first clamping block and the pre-tightening part, when the pre-tightening part moves outward with the wire, the linkage mechanism simultaneously drives the two first clamping blocks to clamp the corresponding outside of the wire, and the stability of the thermal protector body during use is further increased through the mutual cooperation of the pre-tightening part, the first clamping block and the linkage mechanism.

Claims

1. A thermal protector with a protective structure, comprising a thermal protector body (1) and two wires (11) arranged on the thermal protector body (1), the thermal protector body (1) being provided with a shell (2) on the outside, the front end of the shell (2) being provided with a detachable front cover (3), characterized in that: The front cover (3) is provided with a pre-tightening opening (31) for each wire (11) to pass through, the cross section of the pre-tightening opening (31) gradually retracts from the inside of the front cover (3) to the outside of the front cover (3), the external fixing sleeve of the wire (11) is provided with a pre-tightening portion (4) that matches the internal shape of the pre-tightening opening (31), when the wire (11) moves toward the outside of the front cover (3), the pre-tightening portion (4) moves accordingly and abuts against the inner wall of the pre-tightening opening (31), a first clamping block (5) capable of simultaneously clamping the outside of two wires (11) is provided at the center of a side of the inside of the front cover (3) away from the pre-tightening opening (31), a linkage mechanism (6) is provided between the first clamping block (5) and the pre-tightening portion (4), when the pre-tightening portion (4) moves outward with the wire (11), the linkage mechanism (6) simultaneously drives the two first clamping blocks (5) to clamp the outside of the wire (11); A drive bin (7) is fixedly arranged at the inner center of the front cover (3) near the outer shell (2); the drive bin (7) is rectangular in shape and is located at the center between the two wires (11); two first clamping blocks (5) are respectively arranged at two sides of the outside of the drive bin (7); a drive shaft (71) extending toward the inside of the drive bin (7) is arranged on one side of the first clamping block (5) near the drive bin (7); a drive sleeve (72) for the drive shaft (71) to move is arranged on the drive bin (7); a linkage mechanism (6) is arranged inside the drive bin (7) and is respectively connected to the pre-tightening portion (4) and the drive shaft (71); when the pre-tightening portion (4) moves along the pre-tightening opening (31), each drive shaft (71) can be driven to move toward the wire (11) and clamp its outside through the linkage mechanism (6); The linkage mechanism (6) comprises a linkage plate (61) vertically arranged inside the drive chamber (7) and with one side thereof facing the pre-tightening opening (31) of the front cover (3); a pull rope (62) capable of pulling the linkage plate (61) to move accordingly is arranged outside each pre-tightening portion (4); a through opening (63) for the pull rope (62) to pass through is arranged on the drive chamber (7); two drive shafts (71) are symmetrically arranged on both sides of the linkage plate (61); a first linkage block (64) is arranged at one end of each drive shaft (71) close to the linkage plate (61); and second linkage blocks (65) capable of respectively slidably cooperating with the two first linkage blocks (64) and used to drive the corresponding drive shaft (71) to move along the axis of the drive sleeve (72) toward the outside of the drive chamber (7) are arranged on both sides of the linkage plate (61).

2. A thermal protector with a protective structure according to claim 1, characterized in that: The inner wall of the pre-tightening opening (31) of the front cover (3) is covered with a first rubber sleeve (311), and the outside of the pre-tightening portion (4) is wrapped with a second rubber sleeve (41) capable of abutting against the outside of the first rubber sleeve (311).

3. A thermal protector with a protective structure according to claim 1, characterized in that: The inner wall of the front cover (3) is provided with a second clamping block (32) corresponding to each first clamping block (5), and the first clamping block (5) and the second clamping block (32) are respectively provided with a clamping groove for clamping the outside of the wire (11).

4. A thermal protector with a protective structure according to claim 3, characterized in that: The inner walls of the clamping grooves of the first clamping block (5) and the second clamping block (32) are both covered with a second rubber layer (33), and the outside of the second rubber layer (33) is provided with a plurality of protrusions (331) capable of abutting against the outside of the wire (11).

5. The thermal protector with a protective structure according to claim 1, characterized in that: A cylindrical groove (611) recessed in the direction of the housing (2) is provided at the center of the linkage plate (61), a fixed column (612) coaxial with the cylindrical groove (611) is provided inside the cylindrical groove (611), two ends of the fixed column (612) are respectively fixedly connected to two sides of the inside of the driving chamber (7), a limiting hole for the fixed column (612) to pass through is provided at the center of the inside of the cylindrical groove (611), a first spring (6121) capable of moving the linkage plate (61) along the axis of the fixed column (612) in the direction of the housing (2) is sleeved on the outside of the fixed column (612), and two ends of the first spring (6121) are respectively arranged to abut against the inside of the cylindrical groove (611) and the inner side wall of the linkage plate (61).

6. A thermal protector with a protective structure according to claim 5, characterized in that: A first inclined surface (651) inclined in the direction of the linkage plate (61) is provided on a surface of the second linkage block (65) facing the corresponding first linkage block (64); a second inclined surface (641) capable of slidably cooperating with the first inclined surface (651) is provided on a surface of the first linkage block (64) close to the second linkage block (65); a second spring (711) is sleeved on the outside of the drive shaft (71); two ends of the second spring (711) are respectively disposed in contact with one side of the corresponding first linkage block (64) and the inner side of the drive chamber (7).

7. A thermal protector with a protective structure according to claim 6, characterized in that: The outside of each driving shaft (71) is provided with a strip-shaped limit block (712) distributed along the axis direction thereof, and the inner ring of each driving sleeve (72) corresponding to the driving shaft (71) is provided with a strip-shaped limit groove for the strip-shaped limit block (712) to move.

8. The thermal protector with a protective structure according to claim 1, characterized in that: A baffle (34) capable of abutting the front side of the thermal protector body (1) is arranged inside the front cover (3), and a third rubber layer (341) capable of contacting the outside of the front side of the thermal protector body (1) is arranged on a side of the baffle (34) close to the thermal protector body (1).

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