CN215567005U - Unilateral reassembling type pin bushing suitable for pneumatic cylinder annular head - Google Patents

Abstract

A unilateral detachable pin bush suitable for a hydraulic cylinder annular head comprises a first taper bush, a second taper bush, a third taper bush, a taper pin and a central bolt mechanism; the first taper sleeve is arranged in a first clamping plate inner hole of the executed element connecting end; the second taper sleeve is arranged in an inner hole of a second clamping plate of the executed element connecting end; the third taper sleeve is arranged inside the second taper sleeve; the taper pin is arranged in a cavity surrounded by the first taper sleeve, the second taper sleeve and the third taper sleeve; the central bolt mechanism is arranged in the inner hole of the conical pin. The utility model improves the use flexibility of the bolt, and can realize the loading and unloading operation in a single direction.

Description

Unilateral reassembling type pin bushing suitable for pneumatic cylinder annular head

Technical Field

The utility model relates to a unilateral detachable pin bush, in particular to a unidirectional detachable pin bush for connecting a hydraulic cylinder annular head with an execution original piece, and belongs to the technical field of pin equipment.

Background

In the mechanical field, hydraulic transmission is a very common transmission mode, and the most common hydraulic transmission mode is that a hydraulic cylinder drags an executed element to do linear motion; the end part of a piston rod of the hydraulic cylinder is an annular connector, the annular connector is connected with an executed original through a straight pin, and generally, in order to enable a certain angle adjustment amount to exist between the piston rod of the hydraulic cylinder and the executed original, a joint bearing is installed in an inner hole of the annular connector; in the actual use process, because the bearing thrust of the hydraulic cylinder is large, the outer wall of the bolt is abraded into a plurality of step-shaped grooves, and when the bolt needs to be disassembled, the step-shaped grooves are clamped with the joint bearing, so that the bolt cannot be pulled out; in addition, the hydraulic cylinder has a complex use environment, and sometimes the bolt can be assembled and disassembled only from one direction, which is not applicable to a bolt structure assembled and disassembled from two sides; therefore, a pin sleeve which can be rapidly disassembled and assembled in a single direction is needed, so that the field use flexibility of the plug pin is improved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provides a one-side detachable pin sleeve suitable for a hydraulic cylinder annular head, which can improve the field use flexibility of a plug pin.

The problems of the utility model are solved by the following technical scheme:

a unilateral detachable pin bush suitable for a hydraulic cylinder annular head comprises a first taper bush, a second taper bush, a third taper bush, a taper pin and a central bolt mechanism; the first taper sleeve is arranged in a first clamping plate inner hole of the executed element connecting end; the second taper sleeve is arranged in an inner hole of a second clamping plate of the executed element connecting end; the third taper sleeve is arranged inside the second taper sleeve; the taper pin is arranged in a cavity surrounded by the first taper sleeve, the second taper sleeve and the third taper sleeve; the central bolt mechanism is arranged in the inner hole of the conical pin; the taper pin comprises a short taper pin and a long taper pin; the outer walls of the short taper pin and the long taper pin are both conical; the end with the larger outer diameter of the short taper pin is connected with the end with the larger outer diameter of the long taper pin, and the axial leads of the short taper pin and the long taper pin are overlapped; the short taper pin and the long taper pin are provided with penetrating holes along the axial lead direction; the short taper pin inner hole is provided with a step hole at a position far away from the long taper pin, and the long taper pin inner hole is provided with a step hole at a position far away from the short taper pin.

The above unilateral detachable pin bush suitable for the hydraulic cylinder annular head, the first taper bush includes a first cylinder, an outer boss, an inner round table, a rotation-stopping straight pin, a spline and an inner cylinder; the outer wall of the first cylinder is a cylindrical surface, the inner wall of the first cylinder is provided with a tapered hole, a short taper pin is inserted into the inner wall of the first cylinder, and the outer wall of the first cylinder is in contact with the inner hole of the first clamping plate at the connecting end of the executed original; an outer boss is arranged on the outer wall corresponding to the position with the largest diameter of the inner hole of the first cylinder and abuts against the side wall of the inner ring of the joint bearing; an inner circular truncated cone is arranged at the position of the first cylinder with the smallest diameter of the inner hole, an inner cylinder is arranged on the inner wall of the inner circular truncated cone, and the end faces, far away from the outer boss, of the inner circular truncated cone and the inner cylinder are aligned; a cylindrical hole is formed in the center of the inner cylinder; four splines are symmetrically arranged on the inner wall of the inner cylinder close to the outer boss; and a rotation stopping straight pin is arranged on the spline.

The above-mentioned unilateral detachable pin bush suitable for the hydraulic cylinder annular head, the said second taper sleeve includes the second cylinder, third cylinder and outer disc; the outer walls of the second cylinder and the third cylinder are cylindrical surfaces; the inner wall of the second cylinder is a conical inner wall, and the inner wall of the third cylinder is a cylindrical inner wall; the second cylinder and the third cylinder are vertically connected, and the axial leads of the second cylinder and the third cylinder are mutually overlapped; the outer wall of the second cylinder is in contact with the inner wall of the inner ring of the joint bearing, the inner wall of the second cylinder is attached to the outer wall of the long taper pin, and the outer wall of the third cylinder is in contact with the inner hole of the second clamping plate at the connecting end of the executed original; the outer disc is arranged at one end of the outer wall of the third cylinder far away from the second cylinder, and the axis of the outer disc is superposed with the axis of the third cylinder; the end surface of the outer disc is alternately provided with a plurality of bolt holes and threaded holes at equal intervals along the circumferential direction; and the outer disc is fixed on the second clamping plate of the executed element connecting end through a bolt penetrating through the bolt hole.

The above unilateral detachable pin bush suitable for the hydraulic cylinder annular head, the third taper bush includes the fourth cylinder and the inner disc; the outer wall of the fourth cylinder is cylindrical, and the inner wall of the fourth cylinder is conical; the outer wall of the fourth cylinder is in contact with the inner wall of the third cylinder; the inner disc is arranged on the inner wall of the fourth cylinder and is positioned at one end position where the inner diameter of the fourth cylinder is the smallest; the end surface of the inner disc is alternately provided with a plurality of bolt holes and threaded holes at equal intervals along the circumferential direction; the inner wall of the fourth cylinder is in contact with the outer wall of the long taper pin, and the inner disc penetrates through the bolt hole through the bolt to be connected with one end of the long taper pin.

According to the unilateral detachable pin bush suitable for the annular head of the hydraulic cylinder, the central bolt mechanism comprises a central rod and a limiting block; one end of the central rod is provided with an external thread, the other end of the central rod is vertically connected with a rotating rod, and the diameter of the rotating rod is smaller than that of the central rod; the number of the limiting blocks is four, and the limiting blocks are uniformly arranged on the outer wall of the rotating rod far away from the external thread; the width of the limiting blocks is smaller than the distance between the splines, and the number of the limiting blocks is four; the central rod penetrates through an inner hole of the tapered pin, the part of the central rod provided with the external thread is in threaded connection with the nut, and the nut is arranged in a step hole in the long tapered pin; the end face of the limiting block, which is close to the external thread of the central rod, is contacted with the end face of the spline, which is far away from the external boss; the limiting block is contacted with the rotation stopping straight pin; the diameter of the rotating rod is smaller than the inner diameter of an inner circle surrounded by the splines.

In the above unilateral detachable pin bush suitable for the hydraulic cylinder annular head, the part formed by the first cylinder and the outer boss is provided with a plurality of expansion and contraction grooves along the axial lead direction of the first cylinder, and the plurality of expansion and contraction grooves are equidistantly arranged along the circumferential direction of the first cylinder; the fourth cylinder is provided with a plurality of expansion and contraction grooves in the axial lead direction of the fourth cylinder, and the plurality of expansion and contraction grooves are equidistantly arranged in the circumferential direction of the fourth cylinder; the part that the second cylinder and third cylinder constitute is provided with the harmomegathus groove along the axial lead direction of second cylinder, and the quantity of harmomegathus groove is a plurality of, and a plurality of harmomegathus grooves set up along the circumferencial direction equidistance of second cylinder.

According to the utility model, through the connection and matching of each taper sleeve and the taper pin, the aim of dismounting the plug pin in a single direction is effectively achieved, the occurrence of the event that the plug pin cannot be dismounted under the condition of non-ideal construction environment in the past is avoided, the use flexibility of the plug pin is greatly improved, and the service life of the plug pin is greatly prolonged.

Drawings

FIG. 1 is a schematic cross-sectional view of the present invention;

FIG. 2 is a schematic cross-sectional view of a tapered pin according to the present invention;

FIG. 3 is a schematic cross-sectional view of a first taper sleeve according to the present invention;

FIG. 4 is a schematic view of a first taper sleeve structure according to the present invention;

FIG. 5 is a schematic structural view of the center bolt mechanism of the present invention;

FIG. 6 is a schematic cross-sectional view of a third cone sleeve according to the present invention;

FIG. 7 is a schematic structural view of a third taper sleeve according to the present invention;

FIG. 8 is a schematic view of a second sleeve structure according to the present invention.

The list of labels in the figure is: 1. the device comprises a first taper sleeve, 1-1 a first cylinder, 1-2 an outer boss, 1-3 an inner circular truncated cone, 1-4 a rotation stopping straight pin, 1-5 a spline, 1-6 an inner cylinder, 2 a second taper sleeve, 2-1 a second cylinder, 2-2 a third cylinder, 2-3 an outer disc, 3 a third taper sleeve, 3-1 a fourth cylinder, 3-2 an inner disc, 4 a taper pin, 4-1 a short taper pin, 4-2 a long taper pin, 5 a central bolt mechanism, 5-1 a central rod, 5-2 a limiting block, 6 a first clamping plate, 7 a second clamping plate, 8 an expansion and contraction groove and 9 a joint bearing.

Detailed Description

Referring to fig. 1, 2, 3, 4, 5, 6, 7 and 8, the present invention includes a first taper sleeve 1, a second taper sleeve 2, a third taper sleeve 3, a taper pin 4 and a center bolt mechanism 5; the first taper sleeve 1 is arranged in an inner hole of a first clamping plate 6 at the connecting end of an executed element; the second taper sleeve 2 is arranged in an inner hole of a second clamping plate 7 of the connection end of the executed element; the first clamping plate 6 and the second clamping plate 7 are two opposite clamping plates of the connection end of the executed element respectively, an annular head at the end part of a hydraulic cylinder is clamped between the two clamping plates, and a joint bearing 9 is arranged in the annular head; the third taper sleeve 3 is arranged inside the second taper sleeve 2; the taper pin 4 is arranged in a cavity surrounded by the first taper sleeve 1, the second taper sleeve 2 and the third taper sleeve 3; the central bolt mechanism 5 is arranged in an inner hole of the conical pin 4; the taper pins 4 comprise short taper pins 4-1 and long taper pins 4-2; the outer walls of the short taper pin 4-1 and the long taper pin 4-2 are both tapered; the end with the larger outer diameter of the short taper pin 4-1 is connected with the end with the larger outer diameter of the long taper pin 4-2, and the axial leads of the short taper pin and the long taper pin are overlapped; the short taper pin 4-1 and the long taper pin 4-2 are provided with penetrating holes along the axial lead direction; the inner hole of the short taper pin 4-1 is provided with a step hole at a position far away from the long taper pin 4-2, and the inner hole of the long taper pin 4-2 is provided with a step hole at a position far away from the short taper pin 4-1.

The first taper sleeve 1 comprises a first cylinder 1-1, an outer boss 1-2, an inner round table 1-3, a rotation stopping straight pin 1-4, a spline 1-5 and an inner cylinder 1-6; the outer wall of the first cylinder 1-1 is a cylindrical surface, the inner wall of the first cylinder 1-1 is provided with a tapered hole, a short taper pin 4-1 is inserted into the inner wall of the first cylinder 1-1, and the outer wall of the first cylinder 1-1 is in contact with an inner hole of a first clamping plate 6 at the connecting end of an executed element; an outer boss 1-2 is arranged on the outer wall position corresponding to the position where the diameter of the inner hole of the first cylinder 1-1 is the largest, the outer boss 1-2 is abutted against the side wall of the inner ring of the joint bearing 9, the outer boss 1-2 is abutted against the joint bearing 9, when the first taper sleeve 1 is installed in the inner hole of the first clamping plate 6 and the joint bearing 9 is also pushed to the middle of the two clamping plates, the first taper sleeve 1 can be well fixed in the inner hole of the first clamping plate 6, and the first taper sleeve is prevented from being separated; an inner circular truncated cone 1-3 is arranged at the position of the first cylinder 1-1 with the smallest diameter of an inner hole, an inner cylinder 1-6 is arranged on the inner wall of the inner circular truncated cone 1-3, and the end faces, far away from the outer boss 1-2, of the inner circular truncated cone 1-3 and the inner cylinder 1-6 are aligned; the center of the inner cylinder 1-6 is provided with a cylindrical hole; four splines 1-5 are symmetrically arranged on the inner wall of the inner cylinder 1-6 close to the outer boss 1-2; and the spline 1-5 is provided with a rotation stopping straight pin 1-4.

The second taper sleeve 2 comprises a second cylinder 2-1, a third cylinder 2-2 and an outer disc 2-3; the outer walls of the second cylinder 2-1 and the third cylinder 2-2 are both cylindrical surfaces; the inner wall of the second cylinder 2-1 is a conical inner wall, and the inner wall of the third cylinder 2-2 is a cylindrical inner wall; the second cylinder 2-1 and the third cylinder 2-2 are vertically connected, and the axial leads of the second cylinder and the third cylinder are superposed; the outer wall of the second cylinder 2-1 is in contact with the inner ring wall of the knuckle bearing 9, the inner wall of the second cylinder 2-1 is attached to the outer wall of the long taper pin 4-2, and the slope of the inner wall of the second cylinder 2-1 is matched with the slope of the outer wall of the long taper pin 4-2; the outer wall of the third cylinder 2-2 is contacted with the inner hole of a second clamping plate 7 of the connection end of the executed element; the outer disc 2-3 is arranged at one end of the outer wall of the third cylinder 2-2, which is far away from the second cylinder 2-1, and the axis of the outer disc 2-3 is superposed with the axis of the third cylinder 2-2; the end surface of the outer disc 2-3 is alternately provided with a plurality of bolt holes and threaded holes at equal intervals along the circumferential direction; the outer discs 2-3 are fixed on a second clamping plate 7 of the connection end of the executed element through bolt holes by bolts.

The third taper sleeve 3 comprises a fourth cylinder 3-1 and an inner disc 3-2; the outer wall of the fourth cylinder 3-1 is cylindrical, and the inner wall of the fourth cylinder is conical; the outer wall of the fourth cylinder 3-1 is in contact with the inner wall of the third cylinder 2-2; the inner circular disc 3-2 is arranged on the inner wall of the fourth cylinder 3-1 and is positioned at one end position of the fourth cylinder 3-1 with the smallest inner diameter; the end surface of the inner disc 3-2 is alternately provided with a plurality of bolt holes and threaded holes at equal intervals along the circumferential direction; the inner wall of the fourth cylinder 3-1 is in contact with the outer wall of the long taper pin 4-2, and the inner disc 3-2 penetrates through the bolt hole through a bolt to be connected with one end of the long taper pin 4-2; the slope of the inner wall of the fourth cylinder 3-1 is matched with the slope of the outer wall of the long taper pin 4-2.

The central bolt mechanism 5 comprises a central rod 5-1 and a limiting block 5-2; one end of the central rod 5-1 is provided with an external thread, the other end of the central rod 5-1 is vertically connected with a rotating rod, and the diameter of the rotating rod is smaller than that of the central rod 5-1; the number of the limiting blocks 5-2 is four, and the limiting blocks are uniformly arranged on the outer wall of the rotating rod far away from the external thread; the width of the limiting blocks 5-2 is smaller than the distance between the splines 1-5, and the number of the limiting blocks 5-2 is four; the central rod 5-1 penetrates through an inner hole of the tapered pin 4, the part of the central rod 5-1 provided with the external thread is in threaded connection with a nut, and the nut is arranged in a step hole in the long tapered pin 4-2; the end face of the limiting block 5-2 close to the external thread of the central rod 5-1 is in contact with the end face of the spline 1-5 far away from the external boss 1-2; the limiting block 5-2 is in contact with the rotation stopping straight pin 1-4; the diameter of the turning rod is smaller than the inner diameter of the inner circle surrounded by the splines 1-5, which ensures that the turning rod can rotate in the hole surrounded by the splines 1-5.

The part formed by the first cylinder 1-1 and the outer boss 1-2 is provided with a plurality of expansion and contraction grooves 8 along the axial lead direction of the first cylinder 1-1, and the plurality of expansion and contraction grooves 8 are equidistantly arranged along the circumferential direction of the first cylinder 1-1; the fourth cylinder 3-1 is provided with a plurality of expansion and contraction grooves 8 along the axial lead direction of the fourth cylinder 3-1, and the plurality of expansion and contraction grooves 8 are equidistantly arranged along the circumferential direction of the fourth cylinder 3-1; the part formed by the second cylinder 2-1 and the third cylinder 2-2 is provided with a plurality of expansion and contraction grooves 8 along the axial lead direction of the second cylinder 2-1, and the plurality of expansion and contraction grooves 8 are equidistantly arranged along the circumferential direction of the second cylinder 2-1; each expansion and contraction groove 8 can ensure that each part can have certain deformation capacity when being inserted and pulled out, and the applicability and the flexibility of the expansion and contraction groove are improved.

The actual use process is as follows: during installation, the first taper sleeve 1 is inserted into a hole of the first clamping plate 6, then a piston rod of the hydraulic cylinder is in place, and the joint bearing 9 is positioned between the first clamping plate 6 and the second clamping plate 7; then inserting the tapered pin 4, and inserting the short tapered pin 4-1 into the inner wall of the first cylinder 1-1; then inserting the central rod 5-1, enabling the limiting block 5-2 to penetrate through a gap between the splines 1-5, then rotating the central rod 5-1 to enable the limiting block 5-2 to be in contact with the rotation stopping straight pin 1-4, and then installing a nut to fix the central rod; then installing the second taper sleeve 2, inserting the long taper pin 4-2 into the inner wall of the second cylinder 2-1, and fixing the outer disc 2-3 to the second clamping plate 7 by using a bolt to pass through the bolt hole; then, a third taper sleeve 3 is installed, and bolts penetrate through bolt holes to fix the inner disc 3-2 to the end face of the long taper pin 4-2; when the device is disassembled, the bolts on the outer disc 2-3 are disassembled, the bolts are screwed into the threaded holes at the points 2-3 of the outer disc to unscrew the second taper sleeve 2, the bolts on the inner disc 3-2 are disassembled and are inserted into the threaded holes on the inner disc 3-2 to disassemble the inner disc 3-2; and (4) screwing off the nut, rotating the central rod 5-1 to enable the limiting block 5-2 to be aligned with the gap between the splines 1-5 and be pulled out, and disassembling other parts until the parts are completely disassembled.

Claims (6)

1. The utility model provides a unilateral reassembling type guide suitable for pneumatic cylinder annular head which characterized in that: comprises a first taper sleeve (1), a second taper sleeve (2), a third taper sleeve (3), a taper pin (4) and a central bolt mechanism (5); the first taper sleeve (1) is arranged in an inner hole of a first clamping plate (6) of the connection end of the executed original; the second taper sleeve (2) is arranged in an inner hole of a second clamping plate (7) of the connection end of the executed element; the third taper sleeve (3) is arranged inside the second taper sleeve (2); the conical pin (4) is arranged in a cavity surrounded by the first taper sleeve (1), the second taper sleeve (2) and the third taper sleeve (3); the central bolt mechanism (5) is arranged in an inner hole of the conical pin (4); the taper pin (4) comprises a short taper pin (4-1) and a long taper pin (4-2); the outer walls of the short taper pin (4-1) and the long taper pin (4-2) are both conical; the end with the larger outer diameter of the short taper pin (4-1) is connected with the end with the larger outer diameter of the long taper pin (4-2), and the axial leads of the ends are overlapped; the short taper pin (4-1) and the long taper pin (4-2) are provided with penetrating holes along the axial lead direction; the inner hole of the short taper pin (4-1) is provided with a step hole at the position far away from the long taper pin (4-2), and the inner hole of the long taper pin (4-2) is provided with a step hole at the position far away from the short taper pin (4-1).

2. The single-sided removable pin bushing adapted for use with a hydraulic cylinder annular head of claim 1, wherein: the first taper sleeve (1) comprises a first cylinder (1-1), an outer boss (1-2), an inner circular table (1-3), a rotation stopping straight pin (1-4), a spline (1-5) and an inner cylinder (1-6); the outer wall of the first cylinder (1-1) is a cylindrical surface, the inner wall of the first cylinder (1-1) is provided with a tapered hole, a short taper pin (4-1) is inserted into the inner wall of the first cylinder (1-1), and the outer wall of the first cylinder (1-1) is in contact with an inner hole of a first clamping plate (6) at the connecting end of an executed original; an outer boss (1-2) is arranged at the outer wall position corresponding to the position where the diameter of the inner hole of the first cylinder (1-1) is the largest, and the outer boss (1-2) is abutted against the side wall of the inner ring of the joint bearing (9); an inner round table (1-3) is arranged at the position of the first cylinder (1-1) with the smallest diameter of an inner hole, an inner cylinder (1-6) is arranged on the inner wall of the inner round table (1-3), and the end faces, far away from the outer boss (1-2), of the inner round table (1-3) and the inner cylinder (1-6) are aligned; the center of the inner cylinder (1-6) is provided with a cylindrical hole; four splines (1-5) are symmetrically arranged on the inner wall of the inner cylinder (1-6) close to the outer boss (1-2); and the spline (1-5) is provided with a rotation stopping straight pin (1-4).

3. The single-sided removable pin bushing for a hydraulic cylinder annular head of claim 2, wherein: the second taper sleeve (2) comprises a second cylinder (2-1), a third cylinder (2-2) and an outer disc (2-3); the outer walls of the second cylinder (2-1) and the third cylinder (2-2) are cylindrical surfaces; the inner wall of the second cylinder (2-1) is a conical inner wall, and the inner wall of the third cylinder (2-2) is a cylindrical inner wall; the second cylinder (2-1) and the third cylinder (2-2) are vertically connected, and the axial leads of the second cylinder and the third cylinder are superposed; the outer wall of the second cylinder (2-1) is in contact with the inner wall of an inner ring of the joint bearing (9), the inner wall of the second cylinder (2-1) is attached to the outer wall of the long taper pin (4-2), and the outer wall of the third cylinder (2-2) is in contact with an inner hole of a second clamping plate (7) at the connecting end of an executed original; the outer disc (2-3) is arranged at one end of the outer wall of the third cylinder (2-2) far away from the second cylinder (2-1), and the axis of the outer disc (2-3) is superposed with the axis of the third cylinder (2-2); the end surface of the outer disc (2-3) is alternately provided with a plurality of bolt holes and threaded holes at equal intervals along the circumferential direction; the outer disc (2-3) is fixed on a second clamping plate (7) of the connection end of the executed element through a bolt hole by a bolt.

4. The one-sided removable pin bushing adapted for use with a hydraulic cylinder annular head of claim 3, wherein: the third taper sleeve (3) comprises a fourth cylinder (3-1) and an inner circular disc (3-2); the outer wall of the fourth cylinder (3-1) is cylindrical, and the inner wall of the fourth cylinder is conical; the outer wall of the fourth cylinder (3-1) is in contact with the inner wall of the third cylinder (2-2); the inner circular disc (3-2) is arranged on the inner wall of the fourth cylinder (3-1) and is positioned at one end position of the fourth cylinder (3-1) with the smallest inner diameter; the end surface of the inner disc (3-2) is alternately provided with a plurality of bolt holes and threaded holes at equal intervals along the circumferential direction; the inner wall of the fourth cylinder (3-1) is in contact with the outer wall of the long taper pin (4-2), and the inner disc (3-2) penetrates through the bolt hole through a bolt to be connected with one end of the long taper pin (4-2).

5. The one-sided removable pin bushing adapted for use with a hydraulic cylinder annular head of claim 4, wherein: the central bolt mechanism (5) comprises a central rod (5-1) and a limiting block (5-2); one end of the central rod (5-1) is provided with an external thread, the other end of the central rod (5-1) is vertically connected with a rotating rod, and the diameter of the rotating rod is smaller than that of the central rod (5-1); the number of the limiting blocks (5-2) is four, and the limiting blocks are uniformly arranged on the outer wall of the rotating rod far away from the external thread; the width of the limiting blocks (5-2) is smaller than the distance between the splines (1-5), and the number of the limiting blocks (5-2) is four; the central rod (5-1) penetrates through an inner hole of the conical pin (4), the part of the central rod (5-1) provided with the external thread is in threaded connection with a nut, and the nut is arranged in a step hole in the long conical pin (4-2); the end face of the limiting block (5-2) close to the external thread of the central rod (5-1) is contacted with the end face of the spline (1-5) far away from the external boss (1-2); the limiting block (5-2) is in contact with the rotation stopping straight pin (1-4); the diameter of the rotating rod is smaller than the inner diameter of an inner circle surrounded by the splines (1-5).

6. The one-sided removable pin bushing adapted for use with a hydraulic cylinder annular head of claim 5, wherein: the part formed by the first cylinder (1-1) and the outer boss (1-2) is provided with a plurality of expansion and contraction grooves (8) along the axial lead direction of the first cylinder (1-1), and the plurality of expansion and contraction grooves (8) are equidistantly arranged along the circumferential direction of the first cylinder (1-1); the fourth cylinder (3-1) is provided with a plurality of expansion and contraction grooves (8) along the axial lead direction of the fourth cylinder (3-1), and the plurality of expansion and contraction grooves (8) are equidistantly arranged along the circumferential direction of the fourth cylinder (3-1); the part formed by the second cylinder (2-1) and the third cylinder (2-2) is provided with a plurality of expansion and contraction grooves (8) along the axial lead direction of the second cylinder (2-1), and the plurality of expansion and contraction grooves (8) are equidistantly arranged along the circumferential direction of the second cylinder (2-1).

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