Self-locking and unlocking structure of pneumatically popped sleeve supporting rod

Abstract

The utility model relates to a self-locking and unlocking structure of a pneumatically popped sleeve supporting rod. The self-locking and unlocking structure comprises a locking pin, a locking ring assembly, a spring assembly, a small rod and a large rod, the small rod is slidably connected to the inner wall of the large rod; a small rod metal head is fixed in the small rod and is rotationally connected with a locking pin; the locking ring assembly is fixed to the end of the large rod. The spring assembly comprises a spring sleeve and a spring, the spring sleeve comprises an upper spring sleeve and a lower spring sleeve, the upper spring sleeve is slidably connected between the large rod and the small rod which are attached to the locking ring sleeve, and the spring is clamped and fixed between the outer wall of the lower spring sleeve and a groove in the inner wall of the large rod. The utility model has the beneficial effects that the overflow of gas is reduced through the sealing ring, the failure rate is reduced, and the replacement period is prolonged; the locking pin realizes stable supporting after the pneumatic supporting pipe is bounced off and locked; the diameter of the self-locking and unlocking structure is small, so that the diameter difference between the small rod and the large rod is small, and the structure of the sleeve is more stable.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic sleeve structures, and in particular to a self-locking and unlocking structure for a pneumatically ejected sleeve support rod. Background Technology

[0002] The sleeve support rod is a widely used mechanical device in various fields. Its main function is to provide controllable support force, damping force, or assistance, and to achieve telescopic movement within a set stroke range. In existing technologies, mechanical structures can achieve pop-out locking and unlocking of the sleeve support rod during telescopic movement, but airtightness cannot be guaranteed. Therefore, there is an urgent need to propose a structure that ensures airtightness and allows air to smoothly enter the next stage while simultaneously achieving self-locking and unlocking. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a self-locking and unlocking structure for a pneumatically ejected sleeve support rod.

[0004] This pneumatically ejected sleeve support rod self-locking and unlocking structure includes: a locking pin, a locking ring assembly, a spring assembly, a small rod, and a large rod; the small rod is slidably connected to the inner wall of the large rod; a small rod metal head is fixed inside the small rod, and the small rod metal head is rotatably connected to the locking pin; the locking ring assembly is fixed to the end of the large rod; the spring assembly includes a spring sleeve and a spring, the side wall of the large rod has an opening, the inner wall of the large rod has a groove, the spring sleeve is located in the opening, and the inner wall of the spring sleeve fits against the outer wall of the small rod; the spring sleeve includes an upper spring sleeve and a lower spring sleeve, the upper spring sleeve is slidably connected between the large rod and the small rod with the locking ring sleeve fitting, the lower spring sleeve has a protrusion, and the spring is secured between the outer wall of the lower spring sleeve and the groove on the inner wall of the large rod; the end of the lower spring sleeve contacts the outer wall of the locking pin.

[0005] Preferably, the locking ring assembly at the end of the rod includes a locking ring and a locking ring sleeve; the inner wall of the locking ring sleeve has a thread on one side and a bevel on the other side, the outer wall of the rod end has a bevel corresponding to the inner wall of the locking ring sleeve, the locking ring sleeve and the rod are in contact, the outer wall of the locking ring has a thread corresponding to the thread on the inner wall of the locking ring sleeve, and the locking ring is fixed between the locking ring sleeve and the rod by the thread; the end of the locking ring is in contact with the end of the rod.

[0006] Preferably, the metal head of the rod is fitted with a buffer ring on the side wall near the locking ring assembly.

[0007] Preferably, four locking pins are rotatably connected to the side wall of the metal head of the rod, and a sealing ring is sleeved between the locking pins.

[0008] Preferably, the metal head of the small rod extends into the end side wall sleeve of the large rod, where there are two coaxial sealing rings.

[0009] Preferably, the material of the small rod metal head is an aluminum alloy material.

[0010] The utility model has the advantages of:

[0011] 1) The utility model discloses a sealing ring, which realizes the air tightness of the rod, reduces the overflow of gas, reduces the failure rate, and prolongs the replacement cycle.

[0012] 2) The utility model discloses a locking pin fastening connection in the inner wall of the pneumatic support pipe, which realizes the stable support of the pneumatic support pipe after being unlocked.

[0013] 3) The utility model discloses a self-locking and unlocking structure with small diameter and small occupation of the inner diameter of the rod, so that the diameter difference between the small rod and the large rod is small, and the structure of the sleeve pipe is more stable. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the structural drawing of the utility model;

[0015] Figure 2a It is the sectional view of the utility model when locking;

[0016] Figure 2b It is the sectional view of the utility model when unlocking;

[0017] Figure 2c It is the sectional view of the utility model when the small rod is retracted into the large rod;

[0018] Figure 2d It is the sectional view of the utility model when resetting.

[0019] The reference signs are as follows: small rod 1, small rod metal head 2, locking ring 3, buffer ring 4, locking ring sleeve 5, spring sleeve 6, spring 7, large rod 8, sealing ring 1, locking pin 10, sealing ring 2, locking ring assembly 12, spring assembly 13. DETAILED DESCRIPTION

[0020] The utility model will be further described below in combination with examples. The following examples are only used to help understand the utility model. It should be pointed out that for ordinary people in the technical field, the utility model can be modified without departing from the principle of the utility model, and these improvements and modifications also fall within the protection scope of the utility model claims.

[0021] As an embodiment, a self-locking and unlocking structure of a pneumatic ejection sleeve pipe support rod is provided, as shown in Figures 1-2dAs shown, it comprises: locking pin 10, locking ring assembly 12, spring assembly 13, small rod 1 and large rod 8; small rod 1 is slidingly connected to the inner wall of large rod 8; small rod metal head 2 is fixed in small rod 1, and locking pin 10 is rotatably connected to small rod metal head 2; locking ring assembly 12 is fixed at the end of large rod 8; spring assembly 13 comprises spring sleeve 6 and spring 7, the side wall of large rod 8 is provided with an opening, the inner wall of large rod 8 is provided with a groove, spring sleeve 6 is arranged in the opening, and the inner wall of spring sleeve 6 is attached to the outer wall of small rod 1; spring sleeve 6 comprises upper spring sleeve and lower spring sleeve, the upper spring sleeve is slidingly connected to the space between the inner wall of large rod 8 with locking ring sleeve 5 and the outer wall of small rod 1, the lower spring sleeve is provided with a protrusion, and the protrusion is used for pushing spring sleeve 6 to slide along the outer wall of small rod 1; spring 7 is clamped between the outer wall of lower spring sleeve and the groove in the inner wall of large rod 8; the end of lower spring sleeve contacts the outer wall of locking pin 10.

[0022] As shown in Figure 1 and Figure 2a , the locking ring assembly 12 is arranged at the end of the large rod 8 and comprises a locking ring 3 and a locking ring sleeve 5; the inner wall of the locking ring sleeve 5 is provided with a thread on one side and a bevel on the other side, the outer wall of the end of the large rod 8 is provided with a bevel corresponding to the inner wall of the locking ring sleeve 5, the locking ring sleeve 5 and the large rod 8 are attached, the outer wall of the locking ring 3 is provided with a thread corresponding to the thread of the inner wall of the locking ring sleeve 5, and the locking ring 3 is fixed between the locking ring sleeve 5 and the large rod 8 by the thread; the end of the locking ring 3 is attached to the end of the large rod 8; the side wall of the small rod metal head 2 close to the locking ring assembly 12 is sleeved with a buffer ring 4; the buffer ring 4 is used to buffer the impact of the small rod metal head 2 and the locking ring 3, so as to avoid damage to the structure.

[0023] As shown in Figure 2a , four locking pins 10 are rotatably connected to the side wall of the small rod metal head 2, and a sealing ring 1 is sleeved between the locking pins 10; the sealing ring 2 is used to apply a pre-pressure to the locking pins 10, so that the ends of the locking pins 10 always exert force outward.

[0024] As shown in Figure 2a , the small rod metal head 2 extends into the end side wall of the large rod 8 and is sleeved with two coaxial sealing rings 11; the two layers of coaxial sealing rings 11 are used to better ensure the air tightness of the structure, and the air tightness can still be maintained when one of the sealing rings 11 fails.

[0025] The material of the small rod metal head 2 is aluminum alloy material, which makes the small rod metal head 2 light in weight while ensuring the strength.

[0026] The working process of the self-locking and unlocking structure of the pneumatic pop-out sleeve support rod is shown in Figures 1-2d , which comprises the following steps:

[0027] Step 1, locking state: as shown in Figure 2aAs shown, at this time, the locking pin 10 is adhered to the outer wall of the small rod metal head 2 by the action of the sealing ring 9, and the lower outer wall of the locking pin 10 is pressed against the inner wall of the large rod 8; the spring 7 is in an uncompressed state;

[0028] Step two, release the locking: as shown in the figure, Figure 2b Press the convex of the spring sleeve 6 and push the spring sleeve 6 downward, the spring 7 is in a compressed state; the inner wall end of the spring sleeve 6 is provided with a slope, so that the spring sleeve 6 is better inserted into the gap between the locking pin 10 and the inner wall of the large rod 8, and the end of the locking pin 10 is separated from the inner wall of the large rod 8;

[0029] Step three, retract the rod: as shown in the figure, Figure 2c Since the locking pin 10 has been released, the small rod 1 is retracted into the large rod 8;

[0030] Step four, reset state: as shown in the figure, Figure 2d After the small rod 1 is retracted into the large rod 8, release the spring sleeve 6, since the spring 7 is in a compressed state, the spring 7 drives the spring sleeve 6 to reset to the position of the spring sleeve 6 in step one.

Claims

1. A self-locking unlocking structure of a gas-boosted ejected casing support rod, characterized by, The utility model relates to a locking pin, locking ring assembly, spring assembly, small rod and big rod, the small rod is slidably connected in the inner wall of the big rod, the small rod is fixed with small rod metal head in, the small rod metal head is rotatably connected with the locking pin, the locking ring assembly is fixed in the end of the big rod, the spring assembly includes spring sleeve and spring, the lateral wall of the big rod is equipped with the opening, the inner wall of the big rod is equipped with the recess, the spring sleeve is arranged in the opening, and the inner wall of the spring sleeve is attached to the outer wall of the small rod, the spring sleeve includes upper spring sleeve and lower spring sleeve, the upper spring sleeve is slidably connected between the big rod and the small rod with the locking ring sleeve being attached, the lower spring sleeve is equipped with the protrusion, the spring is clamped between the outer wall of the lower spring sleeve and the recess of the inner wall of the big rod, and the end of the lower spring sleeve contacts the outer wall of the locking pin. The locking ring assembly is arranged in the end of the big rod and includes locking ring and locking ring sleeve, the inner wall of the locking ring sleeve is equipped with the thread on one side and the bevel on the other side, the outer wall of the end of the big rod is equipped with the bevel corresponding to the inner wall of the locking ring sleeve, the locking ring sleeve and the big rod are attached, the outer wall of the locking ring is equipped with the thread corresponding to the thread of the inner wall of the locking ring sleeve, and the locking ring is fixed between the locking ring sleeve and the big rod through the thread; the end of the locking ring is attached to the end of the big rod.

2. The self-locking unlocking structure of the air-ejected cannula support rod according to claim 1, characterized in that, The sidewall of the small rod metal head close to the locking ring assembly is sleeved with the buffer ring.

3. The self-locking unlocking structure of the air-ejected cannula support rod according to claim 1, characterized in that, Four locking pins are rotatably connected to the sidewall of the small rod metal head, and the locking pins are sleeved with the sealing ring one.

4. The self-locking unlocking structure of the air-ejected cannula support rod according to claim 1, wherein, The end sidewall of the big rod, into which the small rod metal head extends, is sleeved with two coaxial sealing rings two.

5. The self-locking unlocking structure of the air-ejected cannula support rod according to claim 1, wherein, The small rod metal head is made of aluminum alloy material.

6. The self-locking unlocking structure of the air-ejected cannula support rod according to claim 1, wherein, ​

Images