A flexible connected telescopic pin mechanism

Abstract

The application discloses a flexible connection telescopic pin mechanism, and belongs to the technical field of telescopic pin mechanisms. The telescopic pin mechanism comprises a cylinder, a fixed sleeve fixedly installed on a cylinder cover of the cylinder and covering the outside of a piston rod of the cylinder, a guide sleeve fixedly arranged at the top of the fixed sleeve, a telescopic pin body slidably connected to the guide sleeve, and an elastic compensation assembly arranged between the telescopic pin body and the piston rod of the cylinder. The telescopic pin mechanism further comprises a locking structure arranged on the telescopic pin body and connected to the elastic compensation assembly. Through cooperation of the capsule, the through hole, the positioning bead and the inflation assembly, the telescopic pin mechanism can make the capsule expand and extrude the positioning bead after the telescopic pin body is telescopically extended to a position, so that the positioning bead is extended outward and tightly pressed against a counterpart workpiece, locking is realized, the connecting rigidity between the telescopic pin body and the workpiece is ensured, and therefore the stability and reliability of operation are improved.

Description

Technical Field

[0001] This application relates to the field of telescopic pin mechanism technology, specifically a flexible telescopic pin mechanism. Background Technology

[0002] In many industrial production and mechanical assembly fields, telescopic pin mechanisms, as a key positioning and connection device, are widely used in various equipment for workpiece positioning, component connection, and motion transmission.

[0003] Chinese utility model patent CN205446240U discloses a flexible telescopic pin mechanism. This mechanism reduces the radial force transmitted to the drive cylinder by the telescopic pin through a flexible connection, thus reducing wear and extending service life. However, once the telescopic pin is fully extended, it relies solely on the rigidity of the flexible connection device to maintain the connection with the workpiece. Under vibration or load fluctuations, insufficient connection rigidity can easily lead to loosening or displacement of the telescopic pin, thereby affecting the overall operational stability and reliability.

[0004] Therefore, this application provides a flexible telescopic pin mechanism to solve the above problems. Utility Model Content

[0005] This application provides a flexible telescopic pin mechanism, which aims to solve the problems mentioned in the background art, such as the existing flexible telescopic pin mechanism relying solely on the rigidity of the flexible connection device itself to maintain the connection with the workpiece after the telescopic pin is in place, which is prone to loosening or displacement due to insufficient connection rigidity during vibration or load fluctuation, thus affecting operational stability and reliability.

[0006] To achieve the above objectives, this application provides the following technical solution: a flexible telescopic pin mechanism, comprising a cylinder, a fixed sleeve fixedly mounted on the cylinder head and covering the outside of the cylinder piston rod, a guide sleeve fixedly disposed on the top of the fixed sleeve, a telescopic pin body slidably connected to the guide sleeve, and an elastic compensation component disposed between the telescopic pin body and the piston rod of the cylinder, wherein the telescopic pin mechanism further comprises a locking structure disposed on the telescopic pin body and connected to the elastic compensation component; The locking structure includes a bladder fixedly disposed inside the end of the telescopic pin body away from the elastic compensation component, a through hole on the telescopic pin body corresponding to the outer side of the bladder, a positioning bead slidably connected in the through hole and fixedly connected to the outer side of the bladder, and an inflation component disposed in the fixed sleeve and connected to the elastic compensation component for inflating the bladder and squeezing the positioning bead to lock it in place. By setting the elastic compensation component between the telescopic pin body and the piston rod of the cylinder, elastic buffering can be provided when there is a coaxiality deviation between the telescopic pin body and the cylinder piston rod, avoiding hard contact between the cylinder piston rod and the telescopic pin body. This not only reduces the direct impact of radial force on the cylinder piston rod, but also reduces component wear and extends the service life of the mechanism. At the same time, through the cooperation of the bladder, through hole, positioning bead and inflation component, after the telescopic pin body is extended or retracted to the correct position, the bladder expands and squeezes the positioning bead, allowing the positioning bead to extend outward and press against the paired workpiece to achieve locking. This ensures the connection rigidity between the telescopic pin body and the workpiece, prevents the telescopic pin body from loosening due to vibration or load fluctuations during operation, and thus improves the stability and reliability of operation.

[0007] Preferably, to provide elastic buffering when there is a coaxiality deviation between the telescopic pin body and the cylinder piston rod, the elastic compensation component includes a front sleeve disposed within the fixed sleeve and fixedly connected to the cylinder piston rod, a rear sleeve passing through the front sleeve at the end away from the cylinder piston rod and fixedly connected to the telescopic pin body at the end away from the bladder, and a spring disposed within the front sleeve. The rear sleeve is slidably connected within the front sleeve, and the two ends of the spring are fixedly connected to the inside of the front sleeve and the outside of the rear sleeve, respectively. With this design, when a coaxiality deviation occurs, the rear sleeve will slide within the front sleeve, and the spring absorbs radial force through elastic deformation, thereby playing a buffering role. This reduces the hard collision and wear between the cylinder piston rod and the telescopic pin body, reduces the clearance caused by wear, and improves the service life of the mechanism.

[0008] Preferably, in order to facilitate the installation and use of the inflatable component, the fixing sleeve is provided with a receiving groove for the installation of the inflatable component; the design of the receiving groove provides a preset installation position for the inflatable component, so as to facilitate the installation of the inflatable component, making the structure of the entire mechanism more compact and reducing space occupation.

[0009] Preferably, to achieve the expansion of the bladder, the inflation assembly includes an air cylinder fixedly disposed in the receiving groove, a piston slidably connected in the air cylinder, a push rod passing through one end of the air cylinder and fixedly connected to the piston, a connecting pipe fixedly disposed at the end of the air cylinder away from the push rod, a fixing pipe fixedly disposed in the telescopic pin body, and a connecting frame fixedly disposed at the end of the push rod away from the piston and fixedly connected to the side of the front sleeve. The push rod is slidably connected to the air cylinder, and the two ends of the fixing pipe are fixedly connected to the connecting pipe and the bladder body, respectively. Through the connecting frame and the side of the front sleeve, when the cylinder piston rod moves and drives the front sleeve to move, it will drive the piston connected to the push rod to move through the connecting frame, forcing the gas in the air cylinder into the bladder body through the connecting pipe and the fixing pipe, causing the bladder body to expand and squeeze the positioning bead, thereby realizing the locking function of the telescopic pin body and ensuring the rigidity of the connection between the telescopic pin body and the workpiece.

[0010] Preferably, to avoid interference between the connecting pipe and the telescopic pin body, the connecting pipe is a flexible hose. The design of the connecting pipe as a flexible hose allows it to bend or stretch flexibly with the axial movement of the telescopic pin body, without restricting its sliding within the guide sleeve, thereby ensuring smooth operation of the mechanism and maintaining the air passage's sealed connection.

[0011] Preferably, in order to ensure the locking effect between the telescopic pin body and the workpiece, multiple through holes are provided, and the multiple through holes are distributed in a ring on the telescopic pin body; the design of multiple ring-distributed through holes also allows for multiple positioning beads to be provided. Therefore, when the bladder expands, multiple positioning beads can simultaneously squeeze the workpiece from multiple directions to form multi-point locking, improve contact reliability, thereby improving the connection rigidity between the telescopic pin body and the workpiece, and further enhancing the working stability of the mechanism.

[0012] The flexible telescopic pin mechanism, through the cooperation of the bladder, through hole, positioning bead and inflation component, can cause the bladder to expand and squeeze the positioning bead after the telescopic pin body is extended and retracted to the position. This allows the positioning bead to extend outward and press against the paired workpiece, thus locking it in place. This ensures the connection rigidity between the telescopic pin body and the workpiece and prevents the telescopic pin body from loosening due to vibration or load fluctuations during operation, thereby improving the stability and reliability of operation. This flexible telescopic pin mechanism provides elastic buffering when there is a coaxiality deviation between the telescopic pin body and the cylinder piston rod by setting an elastic compensation component between the telescopic pin body and the cylinder piston rod. This avoids hard contact between the cylinder piston rod and the telescopic pin body, which not only reduces the direct impact of radial force on the cylinder piston rod, but also reduces component wear. Attached Figure Description

[0013] Figure 1 A schematic diagram of a flexible telescopic pin mechanism; Figure 2 A cross-sectional view of a flexible telescopic pin mechanism; Figure 3 This is a cross-sectional structural diagram of the elastic compensation component and the inflatable component in a flexible telescopic pin mechanism. Figure 4 This is a cross-sectional structural diagram of the telescopic pin body in a flexible telescopic pin mechanism.

[0014] In the picture: 1. Cylinder; 2. Fixing sleeve; 21. Receiving groove; 3. Guide sleeve; 4. Telescopic pin body; 5. Elastic compensation component; 51. Front sleeve; 52. Rear sleeve; 53. Spring; 6. Locking structure; 61. Bag body; 62. Through hole; 63. Positioning bead; 64. Inflation assembly; 641. Air cylinder; 642. Piston; 643. Push rod; 644. Connecting tube; 645. Fixing tube; 646. Connecting frame. Detailed Implementation

[0015] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0016] This embodiment provides a flexible telescopic pin mechanism, such as... Figures 1-4 As shown, the telescopic pin mechanism includes a cylinder 1, a fixed sleeve 2 fixedly mounted on the cylinder head of the cylinder 1 and covering the outside of the piston rod of the cylinder 1, a guide sleeve 3 fixedly mounted on the top of the fixed sleeve 2, a telescopic pin body 4 slidably connected to the guide sleeve 3, and an elastic compensation component 5 disposed between the telescopic pin body 4 and the piston rod of the cylinder 1. The telescopic pin mechanism also includes a locking structure 6 disposed on the telescopic pin body 4 and connected to the elastic compensation component 5. The locking structure 6 includes a bladder 61 fixedly disposed inside the end of the telescopic pin body 4 away from the elastic compensation component 5, a through hole 62 opened on the telescopic pin body 4 corresponding to the outside of the bladder 61, a positioning bead 63 slidably connected in the through hole 62 and fixedly connected to the outside of the bladder 61, and an inflation component 64 disposed in the fixed sleeve 2 and connected to the elastic compensation component 5 for inflating the bladder 61 and squeezing the positioning bead 63 to lock it in place.

[0017] In use, after the cylinder 1 is started, its piston rod extends and retracts, and through the elastic compensation component 5, it drives the telescopic pin body 4 to slide along the guide sleeve 3. At this time, the elastic compensation component 5 provides buffering when there is a coaxiality deviation between the telescopic pin body 4 and the piston rod of the cylinder 1 through its own elastic characteristics, avoiding hard contact between the two. When the telescopic pin body 4 extends and retracts to the target position, the inflation component 64 connected to the elastic compensation component 5 moves synchronously. The inflation component 64 inflates the bladder 61 inside the telescopic pin body 4, causing the bladder 61 to expand. The expanded bladder 61 squeezes the positioning bead 63 in the through hole 62 opened on its outer side. Since the positioning bead 63 is fixedly connected to the outer side of the bladder 61, the positioning bead 63 slides in the through hole 62 and extends outward, finally pressing the workpiece to be locked to achieve locking. The fixing sleeve 2 is always covered on the outside of the piston rod of the cylinder 1, providing protection and support for the internal components.

[0018] Specifically, the elastic compensation component 5 includes a front sleeve 51 disposed in the fixed sleeve 2 and fixedly connected to the piston rod of the cylinder 1, a rear sleeve 52 passing through the front sleeve 51 away from the piston rod of the cylinder 1 and fixedly connected to the telescopic pin body 4 away from the bladder 61, and a spring 53 disposed in the front sleeve 51. The rear sleeve 52 is slidably connected in the front sleeve 51, and the two ends of the spring 53 are fixedly connected to the inside of the front sleeve 51 and the outside of the rear sleeve 52, respectively. When the piston rod of cylinder 1 moves, the front sleeve 51, which is fixedly connected to the piston rod, moves synchronously with it. At this time, the rear sleeve 52, which passes through the end of the front sleeve 51 away from the piston rod of cylinder 1, will slide inside the front sleeve 51 because it is fixedly connected to the end of the telescopic pin body 4 away from the bladder 61. When there is a coaxiality deviation between the telescopic pin body 4 and the piston rod of cylinder 1, the rear sleeve 52 will have a small radial or angular displacement relative to the front sleeve 51. The spring 53 inside the front sleeve 51 will undergo elastic deformation with this displacement because its two ends are fixedly connected to the inside and outside of the rear sleeve 52, respectively. The deformation absorbs the radial force generated by the deviation, realizing a flexible connection between the piston rod of cylinder 1 and the telescopic pin body 4. This ensures the force transmission between the front sleeve 51 and the rear sleeve 52 and avoids damage to the components caused by hard contact. At the same time, the elastic restoring force of the spring 53 can help the rear sleeve 52 and the front sleeve 51 return to a relatively concentric state, ensuring the stability of the mechanism's movement.

[0019] In order to facilitate the installation and use of the inflatable component 64, the fixed sleeve 2 is provided with a receiving groove 21 for the installation of the inflatable component 64; the design of the receiving groove 21 provides a preset installation position for the inflatable component 64, so as to make the structure of the entire mechanism more compact and reduce the space occupation.

[0020] Furthermore, the inflation assembly 64 includes an air cylinder 641 fixedly installed in the receiving groove 21, a piston 642 slidably connected in the air cylinder 641, a push rod 643 passing through one end of the air cylinder 641 and fixedly connected to the piston 642, a connecting pipe 644 fixedly installed at the end of the air cylinder 641 away from the push rod 643, a fixing pipe 645 fixedly installed in the telescopic pin body 4, and a connecting frame 646 fixedly installed at the end of the push rod 643 away from the piston 642 and fixedly connected to the side of the front sleeve 51. The push rod 643 is slidably connected to the air cylinder 641, and the two ends of the fixing pipe 645 are fixedly connected to the connecting pipe 644 and the bladder 61, respectively. When the sleeve 51 moves with the piston rod of the cylinder 1, the connecting bracket 646, which is fixedly connected to the side of the sleeve 51, synchronously drives the push rod 643 to move. Since the push rod 643 passes through one end of the cylinder 641 and is fixedly connected to the piston 642, and the push rod 643 is slidably connected to the cylinder 641, the push rod 643 will push the piston 642 to slide inside the cylinder 641 fixed in the receiving groove 21. The sliding of the piston 642 will compress the gas inside the cylinder 641. The gas can be transported through the connecting pipe 644 at the end of the cylinder 641 away from the push rod 643 to the fixed pipe 645 fixed in the telescopic pin body 4. Since the two ends of the fixed pipe 645 are fixedly connected to the connecting pipe 644 and the bladder 61 respectively, the gas finally enters the bladder 61, causing the bladder 61 to expand. The compression is applied to the positioning bead 63, which slides within the through hole 62 and extends outward, ultimately pressing the workpiece to be locked to achieve locking. The entire process uses mechanical linkage to convert the movement of the front sleeve 51 into changes in air pressure within the air cylinder 641, providing stable power for the locking structure 6. Conversely, when the front sleeve 51 moves in the opposite direction with the piston rod of the cylinder 1, the connecting frame 646 drives the push rod 643 to move in the opposite direction. The push rod 643 pulls the piston 642 to slide in the opposite direction within the air cylinder 641, increasing the space and decreasing the air pressure within the air cylinder 641. The gas in the bladder 61 flows back to the air cylinder 641 through the fixed pipe 645 and the connecting pipe 644, causing the bladder 61 to contract. The positioning bead 63 loses its compression and retracts within the through hole 62, releasing the pressure on the workpiece to be locked and achieving unlocking.

[0021] In addition, to avoid the connecting pipe 644 interfering with the telescopic pin body 4's telescopic movement, the connecting pipe 644 is a flexible hose. The design of the connecting pipe 644 as a flexible hose allows it to bend or stretch flexibly with the axial movement of the telescopic pin body 4, without restricting its sliding within the guide sleeve 3, thus ensuring smooth operation of the mechanism and maintaining the air passage's sealed connection.

[0022] Understandably, in order to ensure the locking effect between the telescopic pin body 4 and the workpiece, multiple through holes 62 are provided, and the multiple through holes 62 are distributed in a ring on the telescopic pin body 4. Since the positioning beads 63 are slidably connected in the through holes 62, the design of multiple ring-distributed through holes 62 results in multiple positioning beads 63 being provided accordingly. Therefore, when the bladder 61 expands, multiple positioning beads 63 can simultaneously squeeze the workpiece from multiple directions to form multi-point locking, improve contact reliability, thereby improving the connection rigidity between the telescopic pin body 4 and the workpiece, and further enhancing the working stability of the mechanism.

[0023] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and concept of this application, should be included within the scope of protection of this application.

Claims

1. A flexible telescopic pin mechanism, comprising a cylinder (1), a fixed sleeve (2) fixedly mounted on the cylinder head of the cylinder (1) and covering the outside of the piston rod of the cylinder (1), a guide sleeve (3) fixedly disposed on the top of the fixed sleeve (2), a telescopic pin body (4) slidably connected to the guide sleeve (3), and an elastic compensation assembly (5) disposed between the telescopic pin body (4) and the piston rod of the cylinder (1), characterized in that: The telescopic pin mechanism also includes a locking structure (6) disposed on the telescopic pin body (4) and connected to the elastic compensation component (5). The locking structure (6) includes a bladder (61) fixedly disposed inside the end of the telescopic pin body (4) away from the elastic compensation component (5), a through hole (62) opened on the telescopic pin body (4) corresponding to the outside of the bladder (61), a positioning bead (63) slidably connected in the through hole (62) and fixedly connected to the outside of the bladder (61), and an inflation component (64) disposed in the fixing sleeve (2) and connected to the elastic compensation component (5) for inflating the bladder (61) and squeezing the positioning bead (63) to press and lock.

2. The flexibly connected telescoping pin mechanism of claim 1, wherein: The elastic compensation component (5) includes a front sleeve (51) disposed in the fixed sleeve (2) and fixedly connected to the piston rod of the cylinder (1), a rear sleeve (52) passing through the front sleeve (51) away from the piston rod of the cylinder (1) and fixedly connected to the telescopic pin body (4) away from the bladder (61), and a spring (53) disposed in the front sleeve (51). The rear sleeve (52) is slidably connected in the front sleeve (51), and the two ends of the spring (53) are fixedly connected to the inside of the front sleeve (51) and the outside of the rear sleeve (52), respectively.

3. The flexibly connected telescoping pin mechanism of claim 2, wherein: The fixing sleeve (2) is provided with a receiving groove (21) for installing the inflatable component (64).

4. The flexibly connected telescoping pin mechanism of claim 3, wherein: The inflation assembly (64) includes an air cylinder (641) fixedly installed in the receiving groove (21), a piston (642) slidably connected in the air cylinder (641), a push rod (643) passing through one end of the air cylinder (641) and fixedly connected to the piston (642), a connecting pipe (644) fixedly installed at one end of the air cylinder (641) away from the push rod (643), a fixing pipe (645) fixedly installed in the telescopic pin body (4), and a connecting frame (646) fixedly installed at one end of the push rod (643) away from the piston (642) and fixedly connected to the side of the front sleeve (51). The push rod (643) is slidably connected to the air cylinder (641), and the two ends of the fixing pipe (645) are fixedly connected to the connecting pipe (644) and the bladder (61) respectively.

5. The flexibly connected telescoping pin mechanism of claim 4, wherein: The connecting pipe (644) is a flexible hose.

6. The flexibly connected telescoping pin mechanism of claim 1, wherein: Multiple through holes (62) are provided, and the multiple through holes (62) are distributed in a ring on the telescopic pin body (4).

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