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CN-120674285-B - Hydraulic temperature limiter

CN120674285BCN 120674285 BCN120674285 BCN 120674285BCN-120674285-B

Abstract

The invention discloses a hydraulic temperature limiter which comprises a shell, a first terminal, a second terminal, a metal sheet, a first spring piece, a second spring piece, an elastic movable piece, an expansion diaphragm capsule and a resetting piece. In the invention, under the normal state, the temperature of the temperature measuring area slowly rises, the expansion diaphragm capsule can elastically push the elastic sheet to bend, the hydraulic temperature limiter can realize disconnection, automatic resetting can be realized at the moment, or the temperature of the temperature measuring area continuously rises after the temperature limiter is disconnected, the expansion diaphragm capsule continuously expands and can continuously push the elastic sheet to bend, at the moment, the elastic movable piece is maintained at a deflection position, the cut-off state can be always maintained, the hydraulic temperature limiter needs to be reset by pressing, and automatic connection is avoided.

Inventors

  • MENG FUXING
  • He Sigen

Assignees

  • 浙江豪达电器有限公司

Dates

Publication Date
20260512
Application Date
20250730

Claims (10)

  1. 1. A hydraulic temperature limiter is characterized by comprising a shell, a first terminal (401), a second terminal (402), a metal sheet (5), a first spring piece (6), a second spring piece (7), an elastic movable piece (8), an expansion diaphragm capsule (9) and a reset piece (13), wherein the first terminal (401) and the second terminal (402) are fixedly arranged on the shell, a first connecting end (501) of the metal sheet (5) is fixedly connected to the shell and communicated with the first terminal (401), a second connecting end (502) of the metal sheet (5) is supported by a supporting part (101) in the shell, a first fixed end (601) of the first spring piece (6) is connected to the second connecting end (502) of the metal sheet (5), an elastic end (602) of the first spring piece (6) extends towards the second connecting end (502) of the metal sheet (5), an elastic end (702) of the second spring piece (7) extends towards the second connecting end (402), the elastic movable piece (8) is in a U-shaped state and is clamped between the first elastic end (602) and the second elastic end (702) of the spring piece (7) and the elastic diaphragm capsule (13) respectively, the expansion bellows (9) can expand and push the second spring piece (7) to deflect towards the second terminal (402), and the reset piece (13) is used for pushing the second spring piece (7) to reset; The spring piece three (14) is fixedly connected to the terminal two (402), the other end is an elastic end three (1401), one side, opposite to the spring piece one (6), of the elastic end three (1401) is fixedly connected with the linkage frame (15), the linkage rod (16) comprises a hinge end (1601) and a linkage end (1602), the hinge end (1601) is rotatably connected to the shell, the linkage rod (16) penetrates through the linkage frame (15), the linkage block (17) is fixedly connected to the second end (902) of the expansion diaphragm capsule (9), the pressing portion (1702) of the linkage block (17) abuts against the linkage end (1602) of the linkage rod (16) and is used for pushing the linkage rod (16) to elastically deflect opposite to the spring piece one (6), and the linkage frame (15) can realize elastic deflection of the linkage rod (16) and the spring piece one (6).
  2. 2. The hydraulic temperature limiter according to claim 1, wherein the first elastic end (602) of the first spring piece (6) is provided with a second contact (6021), the third elastic end (1401) of the third spring piece (14) is provided with a first contact (4021), and a supporting spring (18) is elastically pressed against one side of the linkage frame (15) facing away from the second contact (6021).
  3. 3. The hydraulic temperature limiter according to claim 2, wherein the linkage frame (15) includes a first linkage piece (1501) and a second linkage piece (1502) fixedly connected to each other, the first linkage piece (1501) is fixedly connected to the third elastic end (1401), the linkage rod (16) is disposed between the first linkage piece (1501) and the second linkage piece (1502) of the linkage frame (15) in a penetrating manner, and the linkage rod (16) and the second linkage piece (1502) are in contact with each other.
  4. 4. A hydraulic temperature limiter according to claim 1, wherein the expansion bellows (9) has a first end (901) and a second end (902), the expansion bellows (9) being located on a side of the second spring plate (7) facing away from the third spring plate (14), the second end (902) being located towards the second spring plate (7); in the initial state of the expansion diaphragm capsule (9), a gap exists between the second end (902) and the second spring piece (7), and the second end (902) is propped against the linkage end (1602) of the linkage rod (16); the expansion bellows (9) expands, the second end (902) gradually stretches out towards the second spring piece (7) until the expansion bellows abuts against the second spring piece (7), and the second end (902) can push the second spring piece (7) to deflect.
  5. 5. A hydraulic thermostat according to claim 4 wherein the first spring plate (6) has a first state in which the first spring plate (6) is capable of resiliently maintaining the contact two (6021) in contact with the contact one (4021) and a second state in which the first spring plate (6) is capable of deflecting away from the contact one (4021) and the contact two (6021) and the contact one (4021) are disconnected from each other.
  6. 6. A hydraulic temperature limiter according to claim 5, wherein the expansion bellows (9) is pressed against the second spring piece (7) to elastically push the second spring piece (7) to elastically bend, the elastic movable member (8) is capable of deflecting between the first elastic end (602) of the first spring piece (6) and the second elastic end (702) of the second spring piece (7), and the elastic movable member (8) is capable of elastically pushing the first spring piece (6) to the second state.
  7. 7. The hydraulic temperature limiter according to claim 4, wherein the expansion bellows (9) is located on one side of the second spring plate (7) facing away from the first contact point (4021), the reset piece (13) and the first contact point (4021) are located on the same side of the second spring plate (7), the shell comprises a first half shell (1) and a second half shell (2), the first half shell (1) is fixedly provided with a supporting plate (3), and the expansion bellows (9) is arranged on one side of the supporting plate (3) facing away from the second spring plate (7).
  8. 8. A hydraulic temperature limiter according to claim 7, characterized in that the housing is screw-mounted with an adjusting screw (12), the adjusting screw (12) being in abutment with the second end (902) of the expansion bellows (9), the support plate (3) being provided with a spring (10) on the side facing the expansion bellows (9), the spring (10) being capable of resiliently pushing the expansion bellows (9) in the direction of the second end (902).
  9. 9. The hydraulic temperature limiter of claim 1, wherein the first elastic end (602) is integrally connected with a first clamping block (6022), the second elastic end (702) is integrally connected with a second clamping block (7021), the first clamping block (6022) and the second clamping block (7021) are oppositely arranged, the elastic moving part (8) comprises a first movable end (801) and a second movable end (802), clamping grooves (803) are respectively formed in the first movable end (801) and the second movable end (802), the elastic moving part (8) is located between the first clamping block (6022) and the second clamping block (7021), and the first clamping block (6022) and the second clamping block (7021) are respectively clamped into the clamping grooves (803) of the first movable end (801) and the second movable end (802).
  10. 10. The hydraulic temperature limiter according to claim 9, wherein the first movable end (801) and the second movable end (802) of the elastic movable member (8) are provided with bending portions (804), the two bending portions (804) are bent inwards to be concave at one north side, and the two bending portions (804) can be clamped and limited with the first elastic end (602) and the second elastic end (702) respectively.

Description

Hydraulic temperature limiter Technical Field The present invention relates to a temperature limiter, and more particularly, to a hydraulic temperature limiter. Background The temperature limiter is used as an electromechanical integrated temperature control protection device, when the monitored temperature exceeds a preset threshold value, the thermal deformation effect drives the lever mechanism to be converted into contact separation action, circuit cutting is realized, and after the temperature falls back to a safety zone, the deformation assembly generates reverse displacement trend, so that automatic reset can be realized. In order to play a role in safety protection, the part of the temperature limiter can be reset through a mechanical locking structure after being disconnected, and the safety lock can be released by manual intervention after the temperature limiter is disconnected. However, in some applicable scenes of the temperature limiter, multiple control functions are required to be combined, so that the current temperature limiter cannot meet applicable requirements. Disclosure of Invention The invention aims to overcome the defects of the prior art and provide a hydraulic temperature limiter. In order to achieve the purpose, the hydraulic temperature limiter comprises a shell, a first terminal, a second terminal, a metal sheet, a first spring piece, a second spring piece, an elastic movable piece, an expansion diaphragm capsule and a reset piece, wherein the first terminal and the second terminal are fixedly arranged on the shell; the elastic movable piece is U-shaped and is elastically clamped between the elastic end I and the elastic end II, the expansion bellows and the resetting piece are respectively positioned at two sides of the spring piece II, the expansion bellows can expand and push the spring piece II to deflect towards the terminal II, and the resetting piece is used for pushing the spring piece II to reset; The expansion diaphragm capsule comprises a first spring piece, a second spring piece, a third spring piece, a linkage frame, a linkage rod and a linkage block, wherein one end of the first spring piece is fixedly connected to a second terminal, the other end of the first spring piece is an elastic end, the linkage frame is fixedly connected to one side, opposite to the first spring piece, of the elastic end, the linkage rod comprises a hinge end and a linkage end, the hinge end is rotatably connected to a shell, the linkage rod penetrates through the linkage frame, the linkage block is fixedly connected to the second end of the expansion diaphragm capsule, a pressing part of the linkage block abuts against the linkage end of the linkage rod and is used for pushing the linkage rod to elastically deflect opposite to the first spring piece, and the linkage frame can realize linkage between the linkage rod and the first spring piece. The invention further provides that the first elastic end of the spring piece is provided with the second contact, and the third elastic end of the spring piece is provided with the first contact. The invention is further arranged that a supporting spring is elastically pressed on one side of the linkage frame, which is opposite to the second contact. The invention is further arranged that the linkage frame comprises a first linkage piece and a second linkage piece which are fixedly connected with each other, the first linkage piece is fixedly connected with the elastic end III, the linkage rod penetrates through the first linkage piece and the second linkage piece of the linkage frame, and the linkage rod and the second linkage piece are in contact with each other. The expansion bellows is further provided with a first end and a second end, the expansion bellows is positioned on one side of the second spring piece, which is away from the third spring piece, and the second end is arranged towards the second spring piece; the invention is further arranged that in the initial state of the expansion bellows, a gap exists between the second end and the second spring piece, and the second end is propped against the linkage end of the linkage rod; the invention further provides that the expansion bellows expands, the second end gradually stretches out towards the second spring piece until the second end abuts against the second spring piece, and the second end can push the second spring piece to deflect. The invention further provides that the first spring piece has a first state and a second state, the first spring piece can elastically maintain the contact II to be connected with the contact I in the first state, and the second spring piece can deflect back to the contact I in the second state, and the contact II and the contact I are disconnected with each other. The expansion diaphragm capsule is further arranged to be pressed against the second spring piece, so that the second spring piece can be elastically pushed to elastically bend, the elastic m