Centering rod with buffering speed regulating device

Abstract

The centering rod comprises an outer pipe and an inner pipe, the buffer speed regulation device comprises an installation base, an elastic soft rubber piece and a friction piece, the friction piece is provided with a notch, the interior of the elastic piece is a hollow cavity, an air inlet is formed in the elastic piece, and when the inner pipe slides and shrinks relative to the outer pipe, the air inlet is formed in the hollow cavity. Air in the outer pipe enters the elastic soft rubber piece through the air inlet, so that the elastic piece expands and abuts against the inner wall of the outer pipe together with the friction piece. According to the centering rod with the buffering and speed regulating device, gas in the outer pipe can enter the elastic soft rubber piece through the notch in the friction piece, then the friction piece expands synchronously, and the inner pipe is controlled to slide downwards at a constant speed and contract under the action of the gravity of the inner pipe through the friction force between the friction piece and the inner wall of the outer pipe; when heavier load or external force acts on the inner pipe, gas sealed in the outer pipe enters the elastic soft rubber piece through the gas inlet and generates counter-acting force to enable the soft rubber to expand, so that the elastic soft rubber piece and the friction piece abut against the inner wall of the outer pipe, and larger friction force is generated synchronously.

Description

Technical Field

[0001] This utility model relates to the field of measurement technology, and in particular to a telescopic centering rod with a buffer speed regulation device. Background Technology

[0002] Most telescopic booms on the market have a locking mechanism when extended, especially when a certain weight is loaded at one end. During unlocking, gravity often causes a sudden retraction, which can easily damage the load equipment, injure the operator, and also risk damaging the boom itself. Existing cushioning and shock absorption methods include adding an elastic element to the bottom of the inner tube or controlling the gap between the sliding base and the inner diameter of the outer tube within a small range. The former only provides shock absorption when retracted to the bottom and cannot solve the problem of rapid descent under heavy loads, while the latter requires high manufacturing precision; even a slight bend in the tube can cause abnormal extension and retraction. Utility Model Content

[0003] The purpose of this invention is to solve the problems of existing buffering and shock absorption methods, which only provide shock absorption when the tube is retracted to the bottom and cannot solve the problem of rapid drop under heavy loads, or the shortcomings of requiring high manufacturing precision and causing abnormal expansion and contraction when the tube body is slightly bent. This invention provides a centering rod with a buffer speed adjustment device.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a centering rod with a buffer speed regulating device, including an outer tube and an inner tube that is slidably connected to the outer tube and extends and retracts relative to the outer tube. The buffer speed regulating device includes a mounting base installed at the bottom of the inner tube, an elastic element sleeved on the mounting base, and a friction element sleeved on the elastic element. The friction element has a notch. The interior of the elastic element is a hollow cavity and forms an air inlet. When the inner tube slides and contracts relative to the outer tube, the gas in the outer tube enters the elastic element through the air inlet, causing the elastic element to expand and abut against the inner wall of the outer tube.

[0005] Furthermore, the elastic element is a soft rubber element, and the outer edge surface of the soft rubber element has a mounting groove for mounting the friction element.

[0006] Furthermore, the friction element is an annular element, and the gas inside the outer tube enters the elastic element through the notch, causing the elastic element to expand and drive the annular element to abut against the inner wall of the outer tube.

[0007] Furthermore, the bottom of the mounting base has a mounting boss, the bottom of the mounting boss has a mounting post, and the bottom of the mounting post has a locking platform for locking the elastic member.

[0008] Furthermore, the inner tube has a first fixing hole, and the mounting base has a second fixing hole concentrically arranged with the first fixing hole. The locking member passes through the first fixing hole and into the second fixing hole, so that the inner tube is fixedly connected to the mounting base.

[0009] Furthermore, the elastic element has a mounting hole through which the mounting post passes, and the locking platform extends out of the mounting hole and abuts against the bottom of the mounting hole.

[0010] Furthermore, the mounting boss of the mounting base has a positioning groove, and the top of the elastic member has a plurality of positioning platforms for embedding into the positioning groove.

[0011] Furthermore, the friction element includes a plurality of arc-shaped elements, each arc-shaped element having an overlapping portion, and a notch is formed between the overlapping portions of adjacent arc-shaped elements to allow gas from the outer tube to enter the annular element.

[0012] Furthermore, the bottom of the arc-shaped component also has a limiting platform, and the mounting groove of the soft rubber component has a plurality of limiting grooves for the limiting platform to be embedded in.

[0013] The beneficial effects of the centering rod with buffer speed regulation device provided by this utility model are as follows: By fixing the mounting base to the bottom of the inner tube, and after the elastic element is sleeved on the mounting base, the friction element is sleeved on the outer side of the soft rubber, and the outer wall of the annular element abuts against the inner wall of the outer tube, the gas in the outer tube can enter the elastic element through the notch on the friction element, thereby causing the friction element to expand synchronously. The friction force between the friction element and the inner wall of the outer tube is used to control the inner tube to slide down and contract at a uniform speed under its own gravity. When a heavier load or external force is applied to the inner tube, the gas in the outer tube... Gas enters the elastic element through the air inlet and generates a reaction force that causes the soft rubber to expand. This allows both the elastic element and the friction element to come into contact with the inner wall of the outer tube and generate greater friction simultaneously. This prevents the inner tube from contracting too quickly under gravity when under load, maintaining its original contraction speed and sliding down at a uniform rate. In addition, the shock-absorbing structure located between the bottom of the elastic element and the bottom of the outer tube effectively buffers and reduces shock, further improving the operational safety of the centering rod with a buffer speed regulation device and preventing collisions. Attached Figure Description

[0014] Figure 1 This is a cross-sectional view of the centering rod with a buffer speed regulating device provided by this utility model;

[0015] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0016] Figure 3This is a schematic diagram of the structure of the inner tube provided by this utility model;

[0017] Figure 4 Schematic diagram of the buffer speed regulating device provided in the first embodiment of this utility model Figure 1 ;

[0018] Figure 5 This is a schematic diagram of the buffer speed regulating device provided in the second embodiment of the present invention;

[0019] Figure 6 This is a schematic diagram of the structure of the buffer speed regulating device provided in the third embodiment of the present invention;

[0020] Figure 7 Schematic diagram of the buffer speed regulating device provided in the first embodiment of this utility model Figure 2 .

[0021] In the picture:

[0022] 100- Centering rod with buffer speed regulation device,

[0023] 10-Inner tube, 11-First fixing hole, 20-Outer tube, 30-Buffer speed regulating device, 31-Mounting base,

[0024] 311-Mounting boss, 312-Mounting post, 3121-Positioning groove, 313-Embedding platform, 314-Second fixing hole, 32-Elastic element, 321-Mounting groove, 3211-Limiting groove, 322-Positioning platform, 323-Notch

[0025] 33-Friction component, 331-Limiting stage. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0027] See Figure 1-6The present invention provides a centering rod 100 with a buffer speed regulating device, comprising an outer tube 20 and an inner tube 10 slidably connected to the outer tube 20 and extending and retracting relative to the outer tube 20, and a buffer speed regulating device 30; the buffer speed regulating device 30 includes a mounting base 31 installed at the bottom of the inner tube 10, an elastic element 32 disposed at the bottom of the mounting base 31, and a friction element 33 disposed on the elastic element 32. The friction element 33 has a notch. The interior of the elastic element 32 is a hollow cavity forming an air inlet. When the inner tube 10 contracts relative to the outer tube 20, the gas in the outer tube 20 enters the elastic element 32 through the air inlet, causing the elastic element 32 to expand and abut against the inner wall of the outer tube 20. A shock-absorbing structure is also provided between the bottom of the outer tube 20 and the elastic element 32. The centering rod 100 with buffer speed regulation device provided by this utility model fixes the mounting base 31 to the bottom of the inner tube 10, and after the elastic element 32 is sleeved on the mounting base 31, the friction element 33 is sleeved in the soft rubber groove, so that the outer wall of the annular element abuts against the inner wall of the outer tube 20, allowing the gas in the outer tube 20 to enter the elastic element through the notch on the friction element 33, thereby causing the gas in the outer tube 20 to expand into the elastic element through the notch on the friction element 33, and then causing the friction element 33 to expand synchronously. The friction force between the friction element 33 and the inner wall of the outer tube 20 is used to control the inner tube 10 to slide down and contract at a uniform speed under its own gravity; when there is When a heavier load or external force is applied to the inner tube 10, the gas in the outer tube 20 enters the elastic element 32 through the air inlet and generates a reaction force that causes the soft rubber element to expand. This causes both the elastic element 32 and the friction element 33 to come into contact with the inner wall of the outer tube 20 and generate greater friction simultaneously. This prevents the inner tube 10 from contracting too quickly under load and maintains its original contraction speed, which is close to a uniform downward contraction speed. In addition, the shock-absorbing structure set between the bottom of the elastic element 32 and the bottom of the outer tube 20 can effectively buffer and absorb shocks, further improving the operational safety of the centering rod 100 with the buffer speed regulating device and preventing collisions.

[0028] like Figure 2 and Figure 3 As shown, in the embodiment provided by this utility model, the elastic element 32 is a soft rubber part, and the outer edge surface of the soft rubber part has a mounting groove 321 for mounting the friction element 33. By setting the elastic element 32 as a soft rubber part, the elastic deformation of the elastic element 32 can be effectively guaranteed, thereby ensuring that when there is a heavier load or external force acting on the inner tube 10, the gas in the outer tube 20 enters the elastic element 32 through the air inlet and generates a reaction force to expand the soft rubber. This allows both the elastic element 32 and the friction element 33 to abut against the inner wall of the outer tube 20 and generate greater friction force simultaneously. This avoids the inner tube 10 sliding down under its own weight and the inner tube 10 contracting too quickly under load, maintaining the original contraction speed close to uniform downward sliding and contraction.

[0029] like Figure 1-3 As shown, the inner tube 10 provided by this utility model has a first fixing hole 11, and the mounting base 31 has a second fixing hole 314 concentrically arranged with the first fixing hole 11. A locking member passes through the first fixing hole 11 and into the second fixing hole 314, thus fixing the inner tube 10 to the mounting base 31. By using bolts, studs, and pins as locking members passing through the first fixing hole 11 and into the second fixing hole 314, the stability of the fixed connection between the mounting base 31 and the inner tube 10 can be effectively ensured, thereby effectively preventing the mounting base 31 from falling off the bottom of the inner tube 10. In the embodiment provided by this utility model, when the inner tube 10 is contracted relative to the outer tube 20 and located at the bottom of the outer tube 20, the damping platform at the bottom of the elastic element 32 abuts against the damping column on the ground-piercing tip. Since the elastic element 32 provided by this utility model is a soft rubber part, the contact between the elastic element 32 and the damping column is a soft rubber contact, thereby effectively reducing the vibration when the elastic element 32 abuts against the damping column on the ground-piercing tip, achieving the effect of shock absorption and buffering. In addition, as Figure 7 As shown in the embodiment provided by this utility model, the bottom of the elastic member 32 has multiple notches 323, which effectively avoids the suction cup effect between the bottom of the elastic member 32 and the outer tube 20 when the inner tube 10 is pulled upward, resulting in a significant suction force when the inner tube 10 is pulled up, thus improving the convenience for users during operation.

[0030] Example 1:

[0031] like Figure 2 and Figure 4As shown, in this embodiment, the friction element 33 is an annular element. Gas inside the outer tube 20 enters the annular element through a notch, causing the annular element to expand and abut against the inner wall of the outer tube 20. When the locking mechanism is released and the inner tube 10 contracts relative to the outer tube 20, gas inside the outer tube 20 can enter the friction element 33 through the notch on the friction element 33, causing the friction element 33 to expand and abut against the inner wall of the outer tube 20. This utilizes the friction between the friction element 33 and the inner wall of the outer tube 20 to control the inner tube 10 to slide down and contract uniformly under its own gravity. In this embodiment, the bottom of the mounting base 31 has a mounting boss 311, the bottom of the mounting boss 311 has a mounting post 312, and the bottom of the mounting post 312 has a locking platform 313 for locking the elastic element 32. The center of the elastic element 32 has a mounting hole for the mounting post 312 to pass through, and the locking platform 313 extends out of the mounting hole and abuts against the bottom of the mounting hole. By having the mounting boss 311 of the mounting base 31 abut against the inner wall of the inner tube 10, the fit between the mounting base 31 and the inner tube 10 can be effectively ensured. This effectively prevents collisions between the inner tube 10 and the mounting base 31 and the outer tube 20, and also effectively avoids abnormal noises. By having the retaining platform 313 at the bottom of the mounting base 31 protrude from the mounting hole of the elastic member 32 and abut against the bottom of the mounting hole, the mounting post 312 can be inserted into the mounting hole. This effectively improves the stability of the elastic member 32 fitted onto the bottom of the mounting base 31, and prevents the elastic member 32 from falling off the bottom of the mounting base 31. Meanwhile, by inserting the mounting post 312 into the mounting hole of the elastic element 32, the positioning accuracy between the mounting base 31 and the elastic element 32 can be effectively improved, thereby effectively ensuring the fit between the elastic element 32 and the inner wall of the outer tube 20, and thus ensuring the effectiveness of the elastic element 32 and the friction element 33 in contacting the inner wall of the outer tube 20 and generating friction, avoiding the situation where the inner tube 10 shrinks too quickly under load, and still maintaining the original shrinkage speed and sliding down and shrinking at a uniform speed.

[0032] Example 2:

[0033] like Figure 5As shown, the difference between this embodiment and Embodiment 1 is that in this embodiment, the mounting boss 311 of the mounting base 31 has a positioning groove 3121, and the top of the elastic member 32 has multiple positioning platforms 322 for embedding into the positioning groove 3121. In this embodiment, by embedding the positioning platforms 322 on the top of the elastic member 32 into the positioning groove 3121 on the mounting boss 311 of the mounting base 31, the positioning accuracy between the elastic member 32 and the mounting base 31 can be effectively improved. At the same time, when the inner tube 10 contracts relative to the outer tube 20 and drives the elastic member 32 in the buffer speed regulating device 30 to slide relative to the outer tube 20, the air in the outer tube 20 enters the elastic member 32, causing the elastic member 32 to expand and abut against the inner wall of the outer tube 20. This results in relative sliding between the elastic member 32 and the mounting base 31, thereby further improving the effectiveness of the buffer speed regulating device 30.

[0034] Example 3:

[0035] like Figure 6 As shown, the difference between this embodiment and Embodiment 1 is that in this embodiment, the friction element 33 includes multiple arc-shaped elements with overlapping portions. A gap is formed between the overlapping portions of adjacent arc-shaped elements to allow gas from the outer tube 20 to enter the annular element. When the inner tube 10 contracts and slides relative to the outer tube 20 under its own weight, the gas in the outer tube 20 can enter the friction element 33 through the gap formed between the overlapping portions of adjacent arc-shaped elements, causing the friction element 33 to expand. The friction between the friction element 33 and the inner wall of the outer tube 20 controls the inner tube 10 to slide down and contract at a uniform speed under its own weight. Furthermore, the bottom of the arc-shaped element also has a limiting platform 331, and the mounting groove 321 of the soft rubber part has multiple limiting grooves 3211 for the limiting platform 331 to be embedded in. By embedding the limiting platform 331 of the arc-shaped part into the limiting groove 3211 of the mounting groove 321 of the soft rubber part, the positioning accuracy between the arc-shaped part and the mounting groove 321 of the soft rubber part can be effectively improved. At the same time, it can prevent the inner tube 10 from contracting and sliding relative to the outer tube 20 under its own gravity. When the elastic member 32 and the arc-shaped part slide and contract relative to the outer tube 20, relative sliding occurs between the mounting groove 321 of the arc-shaped part and the elastic member 32, thereby further improving the effectiveness of the buffer speed regulating device 30.

[0036] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A centering rod with a buffer speed regulating device, comprising an outer tube (20) and an inner tube (10) slidably connected within the outer tube (20) and extending and retracting relative to the outer tube (20), characterized in that, It also includes a buffer speed regulating device (30), which includes a mounting base (31) installed at the bottom of the inner tube (10), an elastic element (32) sleeved on the mounting base (31), and a friction element (33) sleeved on the elastic element (32). The friction element (33) has a notch. The interior of the elastic element (32) is a hollow cavity and forms an air inlet. When the inner tube (10) slides and contracts relative to the outer tube (20), the gas in the outer tube (20) enters the elastic element (32) through the air inlet, causing the elastic element (32) to expand and abut against the inner wall of the outer tube (20).

2. A centering rod with a buffer speed regulating device as described in claim 1, characterized in that, The elastic element (32) is a soft rubber element, and the outer edge surface of the soft rubber element has a mounting groove (321) for mounting the friction element (33).

3. A centering rod with a buffer speed regulating device as described in claim 2, characterized in that, The friction element (33) is an annular element. The gas in the outer tube (20) enters the annular element through the notch, causing the annular element to expand and come into contact with the inner wall of the outer tube (20).

4. A centering rod with a buffer speed regulating device as described in claim 3, characterized in that, The mounting base (31) has a mounting boss (311) at its bottom, a mounting post (312) at its bottom, and a locking platform (313) at its bottom for locking the elastic member (32).

5. A centering rod with a buffer speed regulating device as described in claim 4, characterized in that, The inner tube (10) has a first fixing hole (11), and the mounting base (31) has a second fixing hole (314) concentrically arranged with the first fixing hole (11). The locking member passes through the first fixing hole (11) and enters the second fixing hole (314) to fix the inner tube (10) and the mounting base (31).

6. A centering rod with a buffer speed regulating device as described in claim 4, characterized in that, The elastic member (32) has a mounting hole through which the mounting post (312) passes, and the locking platform (313) extends out of the mounting hole and abuts against the bottom of the mounting hole.

7. A centering rod with a buffer speed regulating device as described in claim 6, characterized in that, The mounting boss (311) of the mounting base (31) has a positioning groove (3121), and the top of the elastic member (32) has a plurality of positioning platforms (322) for embedding into the positioning groove (3121).

8. A centering rod with a buffer speed regulating device as described in claim 5, characterized in that, The friction element (33) includes a plurality of arc-shaped elements, each arc-shaped element having an overlapping portion, and a gap is formed between the overlapping portions of adjacent arc-shaped elements to allow gas in the outer tube (20) to enter the annular element.

9. A centering rod with a buffer speed regulating device as described in claim 8, characterized in that, The bottom of the arc-shaped part also has a limiting platform (331), and the mounting groove (321) of the soft rubber part has a plurality of limiting grooves (3211) for the limiting platform (331) to be embedded in.

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