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CN-121976990-A - Mechanical self-locking device and mechanical self-locking tolerance bottom plate cylinder

CN121976990ACN 121976990 ACN121976990 ACN 121976990ACN-121976990-A

Abstract

The application relates to a mechanical self-locking device and a mechanical self-locking tolerance bottom plate cylinder. The mechanical self-locking device comprises a first shell, a piston rod, a fixing chamber, steel balls and a locking ring, wherein the first shell is of a hollow structure, the piston rod is arranged in the first shell, the top end of the piston rod can penetrate through the top of the first shell and can move up and down, the fixing chamber is sleeved on the piston rod, the locking ring is arranged on the top of the fixing chamber, a preset distance is reserved between the locking ring and the piston rod, the steel balls are arranged around the piston rod and move up and down, the through holes are closed or opened, the locking ring locks and locks the piston rod when the through holes are closed, and the steel balls move downwards when the through holes are opened, so that unlocking is completed. According to the application, through the arrangement, the technical problems that the traditional tolerance bottom plate cylinder is clamped by relying on pneumatic pressure maintaining, a mechanical self-locking structure is not needed, and once an air source is interrupted, air in the cylinder body can leak, so that a workpiece is loosened and falls off, and potential safety hazards exist are solved.

Inventors

  • JIANG TIEJUN
  • JIANG ZONGJIAN

Assignees

  • 上海德容智能科技有限公司

Dates

Publication Date
20260505
Application Date
20260403

Claims (10)

  1. 1. The mechanical self-locking device is characterized by comprising a first shell, a piston rod, a fixing chamber, a steel ball and a locking circular ring; the first shell is of a hollow structure, and a plurality of vent holes are formed in the first shell; the piston rod is arranged in the first shell, the top end of the piston rod can penetrate through the top of the first shell, and the piston rod can move up and down; the fixed chamber sleeve is arranged on the piston rod, and an accommodating chamber is formed between the fixed chamber and the piston rod; the locking circular ring is arranged at the top of the fixed chamber, and a preset distance is reserved between the locking circular ring and the piston rod, so that a circular through hole is formed; The steel balls are arranged around the piston rod and located in the accommodating cavity, the steel balls can move up and down to close or open the through hole, the locking ring locks and locks the piston rod when the through hole is closed, and the steel balls move downwards to finish unlocking when the through hole is opened.
  2. 2. The mechanical self-locking device according to claim 1, wherein a spring is further provided in the housing chamber, the spring being provided around the piston rod, and a plurality of the steel balls being provided at the top end of the spring.
  3. 3. The mechanical self-locking device according to claim 2, wherein a connecting rod is arranged on the outer wall of the fixing chamber, the connecting rod is fixedly arranged in the first shell, the fixing chamber is of a hollow cylindrical structure with two open ends, and the length between the inner wall of the fixing chamber and the outer wall of the piston rod is equal to the outer diameter of the spring.
  4. 4. A mechanical self-locking device according to claim 3, wherein the predetermined distance between the locking ring and the piston rod decreases gradually from the top end of the locking ring to the top end of the locking ring, and the distance between the top end of the locking ring and the piston rod is smaller than the diameter of the steel ball.
  5. 5. The mechanical self-locking device according to claim 4, wherein the piston rod is further sleeved with an embedded piston rod, the bottom end of the embedded piston rod extends downwards to form an extension part, and the distance from the outer wall of the extension part to the outer wall of the piston rod is smaller than the distance between the top end of the locking circular ring and the piston rod.
  6. 6. The mechanical self-locking device of claim 5, wherein the embedded piston rod is movable downward or returns to its original position, and the bottom end of the extension abuts the steel ball.
  7. 7. The mechanical self-locking device of claim 6, further comprising a thimble, the thimble being a nail structure that abuts the top end of the embedded piston rod after passing through the first housing.
  8. 8. The mechanical self-locking device of claim 7, further comprising a piston disposed at a bottom end of the piston rod, the piston dividing the first housing into an upper chamber and a lower chamber.
  9. 9. A mechanical self-locking tolerance floor cylinder comprising the mechanical self-locking device of any one of claims 1-7, a second housing, a hook, a bracket, and a pin; The second shell is arranged at the top end of the mechanical self-locking device and is communicated with the first shell, the hook has a preset length, and the hook penetrates through the second shell and is connected with the top end of the piston rod; the support block is of a convex structure with two open ends, is arranged at the top end of the second shell and is communicated with the second shell; The pin has the same structure as the supporting block, is arranged in the supporting block and is communicated with the second shell.
  10. 10. The mechanical self-locking tolerance floor cylinder of claim 9, further comprising a sensor disposed on the second housing and a sensor head disposed on the hook and electrically connected between the sensor head and the sensor.

Description

Mechanical self-locking device and mechanical self-locking tolerance bottom plate cylinder Technical Field The invention discloses the technical field of vehicle production lines, and relates to a mechanical self-locking device and a mechanical self-locking tolerance bottom plate cylinder. Background The traditional tolerance bottom plate cylinder is a unit consisting of a shell and a locating pin, wherein the pin in the bottom plate cylinder unit is used for realizing the positioning of the front, back, left and right directions of a vehicle body, and the hook is clamped in the height direction through the cylinder of the bottom plate cylinder unit and an internal mechanical mechanism, so that the positioning in the vertical direction is realized. The clamping principle is that a four-bar structure is adopted to convert the pressure of the air cylinder into the clamping force of the hook, so that the positioning and clamping functions are realized. In order to meet the requirements of clamping different plate thicknesses, a guide groove design is added on a hook body, and a reinforcing steel sheet is added on a mechanical structure, so that a connecting rod mechanism moves on the arc of the reinforcing steel sheet, and the hook can clamp plates with 3mm difference thin and thick plates. Simultaneously, the bottom of the cylinder is provided with a pneumatic control device which is provided with an external air source inlet and an external air source outlet, and after the cylinder is clamped and disconnected, the pneumatic control device automatically seals the air in the cylinder body and prevents the air from leaking, so that the internal mechanism of the cylinder cannot move, a self-locking state is formed, and the disconnected air self-locking is realized through an air pressure maintaining mechanism. The traditional tolerance bottom plate cylinder is clamped by only relying on pneumatic pressure maintaining, a mechanical self-locking structure is not needed, and once an air source is interrupted, air in the cylinder body can leak, so that a workpiece is loosened and falls off, and potential safety hazards exist. Disclosure of Invention In view of the above, the application provides a mechanical self-locking device for solving the problems of loosening and falling of workpieces and potential safety hazards, which comprises a first shell, a piston rod, a fixing chamber, steel balls and a locking ring, wherein the first shell is of a hollow structure, a plurality of vent holes are formed in the first shell, the piston rod is arranged in the first shell, the top end of the piston rod can penetrate through the top of the first shell and can move up and down, the fixing chamber is sleeved on the piston rod, an accommodating cavity is formed between the fixing chamber and the piston rod, the locking ring is arranged at the top of the fixing chamber, a preset distance is formed between the locking ring and the piston rod, a plurality of through holes are formed between the locking ring and the piston rod, the steel balls are arranged around the piston rod and are located in the accommodating cavity, the steel balls can move up and down to close or open the through holes, the locking ring is locked by self-locking of the piston rod when the through holes are closed, and the steel balls move downwards when the through holes are opened, and unlocking of the steel balls is completed. In one possible implementation, a spring is further disposed in the accommodating chamber, the spring is disposed around the piston rod, and a plurality of the steel balls are disposed at the top ends of the spring. In one implementation, a connecting rod is arranged on the outer wall of the fixed chamber, the connecting rod is fixedly arranged in the first shell, the fixed chamber is of a hollow cylindrical structure with two open ends, and the length between the outer walls of the piston rod and the outer diameter of the spring are equal to each other. In one implementation, the preset distance between the locking ring and the piston rod is gradually reduced from the top end of the locking ring to the top end of the locking ring, and the distance between the top end of the locking ring and the piston rod is smaller than the diameter of the steel ball. In one implementation, the piston rod is further sleeved with an embedded piston rod, the bottom end of the embedded piston rod extends downwards to form an extension part, and the distance from the outer wall of the extension part to the outer wall of the piston rod is smaller than the distance between the top end of the locking ring and the piston rod. In one implementation, the embedded piston rod may move downward or return to its original position, and the bottom end of the extension portion abuts against the steel ball. In one implementation manner, the device further comprises a thimble, wherein the thimble is of a nail structure and is abutted with the top end of the embedded p