A new telescopic mechanism

Abstract

This utility model provides a novel telescopic mechanism, comprising: a drive mechanism, an annular component, and a movable component; an annular groove is circumferentially arranged on the outer wall of the movable component; the annular component is fitted into the annular groove of the movable component; the drive mechanism is used to drive the annular component to reciprocate, thereby driving the movable component to reciprocate to achieve telescopic movement. This utility model achieves efficient and stable motion conversion through the cooperation of components such as a motor, lead screw, nut, and annular component, with smooth transmission, high structural strength, simple processing, and convenient installation and maintenance.

Description

Technical Field

[0001] This utility model relates to the field of mechanical transmission equipment technology, specifically to a novel telescopic mechanism. Background Technology

[0002] In applications such as automated equipment, robotic arms, and linear actuators, telescopic mechanisms are core components for achieving linear reciprocating motion of parts. Common telescopic mechanisms include hydraulic / pneumatic cylinders, rack and pinion mechanisms, and ball screw pairs. Among these, the motor-driven screw-nut structure is widely used due to its high control precision and fast response. Its basic principle is that the motor drives the screw to rotate, and the nut, constrained by a guiding structure (such as a groove), converts the rotational motion into linear motion, thereby pushing the load to extend or retract.

[0003] The shortcomings of existing technology:

[0004] 1. Poor load adaptability

[0005] In traditional lead screw and nut mechanisms, the nut and load must be rigidly connected (e.g., directly fixed). If the load has radial deviation or vibration, it can easily lead to lead screw bending, thread wear, or even jamming, reducing lifespan and accuracy.

[0006] 2. Weak resistance to eccentric loads

[0007] When subjected to lateral forces or overturning moments, single-nut structures are prone to accelerated wear due to uneven force distribution, which affects the smoothness of movement.

[0008] 3. Inconvenient maintenance

[0009] The internal parts of the guiding mechanism (such as the slide) are difficult to repair after wear, requiring disassembly of the entire structure and increasing maintenance costs.

[0010] Therefore, existing technologies have shortcomings and need further improvement. Utility Model Content

[0011] In view of the problems existing in the prior art, this utility model provides a novel telescopic mechanism.

[0012] To achieve the above objectives, the specific solution of this utility model is as follows:

[0013] This utility model provides a novel telescopic mechanism, comprising:

[0014] Drive mechanism, ring-shaped component, moving parts;

[0015] An annular groove is provided around the outer wall of the movable part in a circumferential direction.

[0016] The annular component is fitted into the annular groove of the movable component;

[0017] The drive mechanism is used to drive the ring-shaped part to move back and forth, thereby driving the movable part to move back and forth to achieve extension and retraction.

[0018] Furthermore, the drive mechanism is connected to a belt, and a pulley is provided at the other end of the belt; the annular component is mounted on the belt.

[0019] The drive mechanism drives the belt to rotate in both directions, which in turn drives the ring-shaped component to move back and forth, thereby driving the movable component to move back and forth to achieve extension and retraction.

[0020] The drive mechanism includes a motor, a lead screw, a nut, and a mounting bracket;

[0021] The mounting bracket is provided with a sliding groove along the axial direction of the movable part;

[0022] The lead screw is mounted on the output shaft of the motor, and the nut is threaded onto the lead screw. The nut is also located in a groove.

[0023] The motor drives the lead screw to rotate, and the slide is used to limit the rotation of the nut, thereby converting the forward and reverse rotational motion of the lead screw into the linear reciprocating motion of the nut.

[0024] The annular component is mounted on the nut. The annular component moves with the nut and drives the movable component to move back and forth, thereby realizing the telescopic movement.

[0025] Furthermore, a protrusion is provided on the inner wall of the annular component, which is embedded in the annular groove of the movable component to drive the movable component to reciprocate.

[0026] Furthermore, the protrusion is composed of a roller and a rotating shaft. The roller is sleeved on the rotating shaft, which is mounted on the inner wall of the annular part. The roller is embedded in the annular groove of the movable part, and the axial direction of the roller is parallel to the axial direction of the movable part.

[0027] Furthermore, the lead screw is provided with two nuts by means of a threaded connection in the same direction, and each nut is provided with a corresponding annular part, one of which is set in an annular groove and the other annular part is sleeved on the movable part.

[0028] Furthermore, two reinforcing rods are fixedly connected between the two annular components, with the two ends of the reinforcing rods respectively fixed to the two annular components.

[0029] Furthermore, the movable component has a cylindrical structure.

[0030] Furthermore, a bearing is provided at the end of the lead screw away from the motor, and the bearing is mounted on a mounting bracket.

[0031] Furthermore, a cover is detachably provided on the slide groove via screws.

[0032] The technical solution of this utility model has the following beneficial effects:

[0033] 1. High fault tolerance and load adaptability

[0034] The non-rigid engagement mechanism between the annular component and the annular groove allows for slight radial deviations or thermal deformation of the moving parts, avoiding problems such as screw bending and thread damage caused by alignment errors in traditional rigid connections. It is especially suitable for long-stroke telescopic scenarios.

[0035] The moving parts adopt a cylindrical structure, which reduces the weight and enhances the radial stiffness, making them suitable for heavy-duty telescopic requirements.

[0036] 2. Strong resistance to eccentric loads and stability

[0037] The symmetrical layout of the double nuts, combined with the rigid connection of the reinforcing rod, forms a closed-loop force-bearing frame, which evenly distributes the load, effectively resists lateral forces and overturning moments, and prevents wear or jamming caused by stress concentration at a single point.

[0038] A bearing is added to the end of the lead screw to reduce cantilever vibration, ensure transmission coaxiality, and improve positioning accuracy under high-speed motion.

[0039] 3. Modular and maintainable design

[0040] The chute is equipped with a removable cover, allowing for quick inspection of nuts, cleaning of debris, or replacement of roller components without complete disassembly, significantly reducing maintenance costs and downtime. Attached Figure Description

[0041] Figure 1 This is a perspective view of the present invention;

[0042] Figure 2 This is a perspective view of the present invention after the cover has been removed;

[0043] Figure 3 This is a perspective view of the present invention after the mounting bracket has been further removed;

[0044] Figure 4 This is a perspective view of the present invention after further removal of the movable parts;

[0045] Figure 5 This is a perspective view of the movable component of this utility model;

[0046] Figure 6 This is a perspective view of the roller and shaft of this utility model.

[0047] Attached image captions:

[0048] 1. Motor; 2. Lead screw; 3. Nut; 4. Mounting bracket; 5. Moving part; 6. Ring part; 7. Ring groove; 8. Slide groove; 9. Roller; 10. Shaft; 11. Reinforcing rod; 12. Bearing; 13. Cover. Detailed Implementation

[0049] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0050] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0051] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0052] In the description of this embodiment, the terms "upper," "lower," "front," "rear," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0053] Combination Figure 1 - Figure 6 As shown, this utility model provides a novel telescopic mechanism, comprising:

[0054] Drive mechanism, ring component 6, moving component 5;

[0055] An annular groove 7 is provided around the outer wall of the movable part 5 in a circumferential manner.

[0056] The annular component 6 is fitted into the annular groove 7 of the movable component 5;

[0057] The drive mechanism is used to drive the ring-shaped part 6 to reciprocate, thereby driving the movable part 5 to reciprocate to achieve extension and retraction.

[0058] The drive mechanism is connected to a belt, and a pulley is provided at the other end of the belt. The annular component 6 is mounted on the belt.

[0059] The drive mechanism drives the belt to rotate in both directions, which in turn drives the ring 6 to move back and forth, thereby driving the movable part 5 to move back and forth to achieve extension and retraction.

[0060] The motor 1, lead screw 2, nut 3, and mounting bracket 4 are described.

[0061] The mounting bracket 4 is provided with a sliding groove 8 along the axial direction of the movable part 5;

[0062] The lead screw 2 is mounted on the output shaft of the motor 1, and the nut 3 is threaded onto the lead screw 2. The nut 3 is also located in the slide groove 8.

[0063] The motor 1 drives the lead screw 2 to rotate, and the slide groove 8 is used to limit the rotation of the nut 3, thereby converting the forward and reverse rotational motion of the lead screw 2 into the linear reciprocating motion of the nut 3.

[0064] The annular component 6 is mounted on the nut 3 and is also located in the annular groove 7 of the movable component 5. The annular component 6 moves with the nut 3 and drives the movable component 5 to reciprocate, thereby achieving telescopic movement.

[0065] The inner wall of the annular member 6 is also provided with a protrusion, which is embedded in the annular groove 7 of the movable member 5 to drive the movable member 5 to reciprocate.

[0066] The protrusion is composed of a roller 9 and a rotating shaft 10. The roller 9 is sleeved on the rotating shaft 10, and the rotating shaft 10 is installed on the inner wall of the annular part 6. The roller 9 is embedded in the annular groove 7 of the movable part 5, and the axial direction of the roller 9 is parallel to the axial direction of the movable part 5.

[0067] The lead screw 2 is provided with two nuts 3 by means of a threaded connection in the same direction. Each nut 3 is provided with a corresponding ring part 6. One ring part 6 is set in the annular groove 7, and the other ring part 6 is sleeved on the movable part 5.

[0068] Two reinforcing rods 11 are also fixedly connected between the two annular parts 6, with the two ends of the reinforcing rods 11 fixed to the two annular parts 6 respectively.

[0069] The movable component 5 has a cylindrical structure.

[0070] The end of the lead screw 2 away from the motor 1 is also provided with a bearing 12, which is mounted on the mounting bracket 4.

[0071] The slide 8 is detachably fitted with a cover 13 by screws.

[0072] The principle of this utility model is as follows:

[0073] Power input and motion conversion

[0074] Motor 1 drive: After starting, motor 1 drives the lead screw 2 to rotate.

[0075] Nut 3 linear motion: Nut 3 is threaded onto lead screw 2 and is constrained by the slide groove 8 on mounting bracket 4, preventing it from rotating, thus converting the rotational motion of lead screw 2 into linear reciprocating motion of nut 3 along the axis of lead screw 2.

[0076] Thrust is transferred to moving part 5

[0077] Linkage of ring part 6: A ring part 6 is installed on the nut 3, and the ring part 6 is embedded in the annular groove 7 on the outer wall of the movable part 5.

[0078] Rolling friction transmission:

[0079] The inner wall of the annular part 6 is provided with a protruding roller 9 and a rotating shaft 10, and the roller 9 is embedded in the annular groove 7.

[0080] When the nut 3 moves linearly, the annular part 6 pushes the side wall of the groove 7 through the roller 9, driving the movable part 5 to move linearly in sync.

[0081] The axis of roller 9 is parallel to the axis of moving part 5, and the friction is small during the rotation of moving part 5.

[0082] Double nut synergistic reinforcement

[0083] Lead screw 2 is equipped with two nuts 3 in the same direction, each with an independent ring part 6:

[0084] Main annular component 6: Inserted into the groove 7 of movable component 5 to transmit thrust.

[0085] Sub-ring component 6: It is fitted onto the outer wall of the movable component 5 and is rigidly connected to the main ring component 6 through the reinforcing rod 11 to form a closed-loop frame, thereby enhancing the resistance to eccentric loads.

[0086] The two nuts 3 move synchronously, and the load is distributed through the reinforcing rod 11 to suppress the swaying of the moving part 5.

[0087] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the protection scope of the present utility model.

Claims

1. A novel telescopic mechanism, characterized in that, include: Drive mechanism, ring-shaped component, moving parts; An annular groove is provided around the outer wall of the movable part in a circumferential direction. The annular component is fitted into the annular groove of the movable component; The drive mechanism is used to drive the ring-shaped part to move back and forth, thereby driving the movable part to move back and forth to achieve extension and retraction.

2. The telescopic mechanism according to claim 1, characterized in that: The drive mechanism is connected to a belt, and a pulley is provided at the other end of the belt. The annular component is mounted on the belt. The drive mechanism drives the belt to rotate in both directions, which in turn drives the ring-shaped component to move back and forth, thereby driving the movable component to move back and forth to achieve extension and retraction.

3. The telescopic mechanism according to claim 1, characterized in that: The drive mechanism includes a motor, a lead screw, a nut, and a mounting bracket; The mounting bracket is provided with a sliding groove along the axial direction of the movable part; The lead screw is mounted on the output shaft of the motor, and the nut is threaded onto the lead screw. The nut is also located in a groove. The motor drives the lead screw to rotate, and the slide is used to limit the rotation of the nut, thereby converting the forward and reverse rotational motion of the lead screw into the linear reciprocating motion of the nut. The annular component is mounted on the nut. The annular component moves with the nut and drives the movable component to move back and forth, thereby realizing the telescopic movement.

4. The telescopic mechanism according to claim 1, characterized in that: The inner wall of the annular component is also provided with a protrusion, which is embedded in the annular groove of the movable component to drive the movable component to reciprocate.

5. The telescopic mechanism according to claim 4, characterized in that: The protrusion is composed of a roller and a rotating shaft. The roller is sleeved on the rotating shaft, which is installed on the inner wall of the annular part. The roller is embedded in the annular groove of the movable part, and the axial direction of the roller is parallel to the axial direction of the movable part.

6. The telescopic mechanism according to claim 3, characterized in that: The lead screw is provided with two nuts that are threaded in the same direction. Each nut is provided with a corresponding annular part. One annular part is set in an annular groove, and the other annular part is sleeved on the movable part.

7. The telescopic mechanism according to claim 5, characterized in that: Two reinforcing rods are also fixedly connected between the two ring-shaped parts, with the two ends of the reinforcing rods fixed to the two ring-shaped parts respectively.

8. The telescopic mechanism according to claim 3, characterized in that: The movable component has a cylindrical structure.

9. The telescopic mechanism according to claim 3, characterized in that: The end of the lead screw away from the motor is also provided with a bearing, which is mounted on a mounting bracket.

10. The telescopic mechanism according to claim 3, characterized in that: The slide is detachably fitted with a cover via screws.

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