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CN-116177438-B - Supporting structure of horizontal jack

CN116177438BCN 116177438 BCN116177438 BCN 116177438BCN-116177438-B

Abstract

The application relates to the technical field of horizontal jacks, in particular to a supporting structure of a horizontal jack, which comprises a bottom frame, a lifting oil cylinder, an oil return valve, a lifting arm and a transmission plate, wherein the transmission plate is connected with the lifting oil cylinder, a protection base is fixed on the bottom frame, a first telescopic rod is hinged on the protection base, a second telescopic rod coaxially slides in the first telescopic rod, the other end of the second telescopic rod is hinged on the transmission plate, the first telescopic rod and the second telescopic rod can be extended along with lifting of the lifting arm, the first telescopic rod and the second telescopic rod are mutually locked at multiple positions in the extending direction, and an unlocking mechanism for unlocking the first telescopic rod and the second telescopic rod is further arranged on the first telescopic rod. According to the application, the auxiliary mechanical support is utilized to apply a protection function to the lifting state of the lifting arm, so that the problem that potential safety hazards exist because the lifting arm cannot be effectively supported when hydraulic failure occurs in the lifting process is solved.

Inventors

  • ZHENG XINQIANG
  • LIU ZHENGYANG

Assignees

  • 杭州盈江机械制造有限公司

Dates

Publication Date
20260505
Application Date
20230213

Claims (6)

  1. 1. A supporting structure of a horizontal jack comprises a bottom frame (1), a lifting oil cylinder (102) fixed on the bottom frame (1), an oil return valve (108) for releasing pressure of the lifting oil cylinder (102), a lifting device and a lifting device, The lifting mechanism is characterized in that a protective base (3) is fixed at the position, close to the fixed end of the lifting oil cylinder (102), of the chassis (1), a first telescopic rod (401) is hinged to the protective base (3), a second telescopic rod (402) is coaxially and slidably arranged in the first telescopic rod (401), one end, far away from the protective base (3), of the second telescopic rod (402) is hinged to the transmission plate (107), a plurality of slots (403) are formed in the first telescopic rod (401) along the length direction of the transmission plate, a plurality of elastic pieces (404) are fixed at the end, close to the fixed end of the first telescopic rod (401), of the second telescopic rod (402), an inserting block (405) is fixed on the outer wall of the free end of the elastic piece (404), the inserting block (405) can be inserted into the slots (403), one side, far away from the transmission plate (3), of the inserting block (405) is coaxially and slidably arranged in the first telescopic rod (403), which is provided with a guide rope (5), of the unlocking mechanism (5) can be separated from the inner wall (6) of the main telescopic rod (403), and the unlocking mechanism (5) can be separated from the guide surface (5) of the inserting block (403) at the same time the unlocking mechanism (5) further comprises a winding box (701) fixed on the first telescopic rod (401), the winding box (701) is positioned on one side of the linkage part (8) away from the second telescopic rod (402), a plurality of supporting ropes (602) are fixedly connected to the main rope (6), the free ends of the supporting ropes (602) are fixed to the free ends of corresponding elastic sheets (404), the elastic force of the elastic sheets (404) is larger than the tensile force of the supporting ropes (602) on the inserting block (405), the winding box (701) is positioned on one side of the linkage part (8) away from the second telescopic rod (402), a winding shaft (702) is fixedly arranged in the winding box (701), the winding shaft (702) is rotatably provided with the winding frame (703), the winding shaft (702) and the winding frame (703) are fixedly connected with the same spiral spring (704) at the same time; the main rope (6) is fixed at one end far away from the second telescopic rod (402) and is wound on the outer wall of the winding frame (703), the free end of the main rope (6) can penetrate out of the winding box (701) and is overlapped with the central line of the first telescopic rod (401) in the length direction, the linkage part (8) comprises a mounting frame (801) fixed on the winding box (701), one sliding frame (803) is arranged on the mounting frame (801) in a sliding mode along the length direction of the first telescopic rod (401), two clamping blocks (805) are arranged on the sliding frame (803) in a sliding mode, a clamping spring (806) for pushing the clamping blocks (805) to slide to be close to the main rope (6) is fixed on the sliding frame (803), the linkage part (8) further comprises a linkage rod (810) arranged on the winding box (701) in a sliding mode along the length direction of the main rope (6), the linkage rod (810) is abutted between the two clamping blocks (805), a groove (813) is formed in the mounting frame (801), the clamping blocks (805) are arranged on the linkage rod (810) in a sliding mode, the groove (813) is capable of being abutted against the inner wall (813) of being close to the second telescopic rod (813), simultaneously, the clamping block (805) can be abutted to the main rope (6) after entering the groove (813), at the moment, the friction force of the clamping block (805) to the main rope (6) is larger than the tension force of the elastic piece (404) to the main rope (6), one end, far away from the second telescopic rod (402), of the linkage rod (810) is fixedly connected with the traction rope (816), one end, far away from the linkage rod (810), of the traction rope (816) is connected to the control part (9), and the linkage rod (810) can slide to drive the clamping block (805) and the sliding frame (803) to slide together to be close to the lifting hand (105).
  2. 2. The supporting structure of a horizontal jack of claim 1, wherein one end of the main rope (6) far away from the winding box (701) is fixed with a traction spring (601), and the other end of the traction spring (601) is fixedly connected with the inner wall of the second telescopic rod (402) far away from the first telescopic rod (401).
  3. 3. The supporting structure of a horizontal jack according to claim 1, wherein the control part (9) comprises a control frame (901) fixed on the underframe (1) and a control shaft (902) rotatably arranged on the underframe (1), the hauling rope (816) is fixed on the control shaft (902) and wound on the control shaft (902), meanwhile, a control gear (903) is fixedly connected to the end part of the control shaft (902), a pedal (905) is slidably arranged on the control frame (901) along the vertical direction, a control rack (906) is fixedly connected to the pedal (905), and the control rack (906) is meshed with the control gear (903).
  4. 4. The supporting structure of a horizontal jack of claim 1, wherein arc-shaped grooves (807) are formed in the opposite side walls of the clamping blocks (805), the arc-shaped grooves (807) can be abutted against the main ropes (6), and friction patterns are formed in the inner walls of the arc-shaped grooves (807).
  5. 5. The supporting structure of the horizontal jack of claim 1, wherein the side wall of the groove (813) far away from the second telescopic rod (402) is provided with an arc surface (814) for forcing the two clamping blocks (805) to be separated, the clamping blocks (805) are abutted against the arc surface (814), and the linkage rod (810) is fixedly provided with a reset spring (812) for driving the linkage rod (810) to slide close to the second telescopic rod (402).
  6. 6. The supporting structure of a horizontal jack according to claim 5, wherein the linkage rod (810) is further fixedly provided with an abutting block (815), the abutting block (815) is located at one side of the arc surface (814) away from the second telescopic rod (402), and the clamping block (805) can abut against the abutting block (815).

Description

Supporting structure of horizontal jack Technical Field The application relates to the technical field of horizontal jacks, in particular to a supporting structure of a horizontal jack. Background The horizontal jack uses a rigid jacking piece as a working device, and a light and small lifting device for jacking a heavy object in a small stroke through a top bracket is mainly used for repairing vehicles and other lifting and supporting works in departments such as factories and mines, transportation and the like. The invention discloses a novel horizontal jack, which comprises a chassis, a front wall and a rear wall which are positioned at the outermost side of the chassis, wherein a pressing block for connecting a handle and a supporting plate for installing a supporting arm are hinged between the front wall and the rear wall. An oil cylinder is fixed below the pressing block, oil pressure can be injected into the oil cylinder when the pressing block is pressed down, a triangular transmission plate is arranged between the oil cylinder and the supporting arm, fixed focus of the transmission plate is hinged to the supporting plate, and two bottom corners of the transmission plate are respectively hinged to a piston rod of the oil cylinder and the transmission plate. When the oil cylinder is filled with oil and extends, the transmission plate can be pushed to move, so that the supporting arm is driven to move, and lifting of the supporting arm is realized. However, in the related art, the lifting of the lifting arm is completely dependent on the pushing of the oil cylinder, and when the hydraulic system of the oil cylinder fails and the pushing force is lost, the lifted object is likely to fall down under the action of self gravity, so that a safety accident can occur, and potential safety hazards exist. Disclosure of Invention The application provides a supporting structure of a horizontal jack, which utilizes auxiliary mechanical supports such as a telescopic rod and the like to apply a protection function to the lifting state of a supporting arm, namely, the telescopic rod synchronously extends along with lifting of the lifting arm and automatically locks the telescopic rod at multiple positions in the extending direction, and the extended and locked telescopic rod can support the lifting arm when a lifting oil cylinder fails, so that the problem that potential safety hazards exist because the telescopic rod cannot be effectively supported when hydraulic failure occurs in the lifting process is solved. The application provides a supporting structure of a horizontal jack, which adopts the following technical scheme: A supporting structure of a horizontal jack comprises a bottom frame, a lifting oil cylinder fixed on the bottom frame, an oil return valve for enabling the lifting oil cylinder to release pressure, a lifting arm hinged on the bottom frame and a transmission plate fixed on the lifting arm, wherein the transmission plate is connected with the lifting oil cylinder, a protection base is fixed on the bottom frame close to the fixed end of the lifting oil cylinder, a first telescopic rod is hinged to the protection base, a second telescopic rod is coaxially and slidingly arranged in the first telescopic rod, one end of the second telescopic rod, far away from the protection base, is hinged to the transmission plate, a plurality of slots are formed in the first telescopic rod along the length direction of the first telescopic rod, a plurality of elastic pieces are fixed at the end portions of the second telescopic rod, insertion blocks are fixed on the outer walls of free ends of the elastic pieces, the insertion blocks can be inserted into the slots, a guide surface capable of being abutted to the inner wall of the slots is formed in one side of the insertion block, which faces the transmission plate, and an unlocking mechanism for driving the insertion blocks to be separated from the slots is also arranged on the first telescopic rod. Through adopting above-mentioned technical scheme, thereby lift cylinder extension can drive the drive plate and rotate and make the lifting arm lifting, and the drive plate rotation can stimulate first telescopic link and second telescopic link extension this moment to drive the elastic sheet and take place deformation to the inside emergence of second telescopic link under the direction effect of guide surface, thereby drive the inserted block and break away from the slot, make the telescopic link follow lifting arm lifting and synchronous extension, and first telescopic link and second telescopic link can carry out the automatic locking of multiposition in the extension direction. When the hydraulic system fails in the lifting process, the inserting block can be kept in a state of being inserted into the inserting groove under the action of the elastic piece, so that the telescopic rod cannot be contracted, the telescopic rod can replace the lifting oil cylinder to