Push-pull type chain transmission mechanism
By using a push-pull chain drive mechanism, the problems of complex structure and limited extension stroke of existing devices are solved, achieving high-precision and stable linear motion, which is suitable for automated production lines and material handling.
Patent Information
- Application Number
- CN202520658161.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-09
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-04-09
AI Technical Summary
Existing mechanical linkage linear actuators have complex structures, making it difficult to achieve efficient, large-span telescopic movements. They also have high protection costs in harsh environments, are difficult to maintain, and are highly dependent on power sources.
Design a push-pull chain drive mechanism, including a slide rail assembly, a sprocket assembly and a chain. The chain drives the slide rail assembly to achieve synchronous movement. The position is detected by a proximity switch, and the pipeline layout is optimized to avoid interference.
It achieves high-precision and stable linear telescopic motion, reduces structural complexity, increases telescopic stroke, and is suitable for various automated production lines and material handling scenarios.
Smart Images
Figure CN223891734U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mechanical transmission technology, specifically a push-pull chain transmission mechanism. Background Technology
[0002] In the field of industrial automation, linear telescopic motion actuators serve as key functional units in scenarios such as material handling and precision positioning, and their performance directly affects the operating efficiency and operational accuracy of production systems. Currently, the commonly used mechanical linkage linear actuators typically contain numerous precision transmission components in their system architecture, leading to a significant increase in overall structural complexity.
[0003] The aforementioned technical deficiencies are particularly prominent in industrial machine applications, specifically manifested as follows: complex pipeline layouts restrict the need for compact equipment design; there is a significant difference between the life cycle of pneumatic components and the wear rate of mechanical parts, making it difficult to formulate maintenance strategies; in harsh industrial environments such as dust and oil mist, the protection cost of precision moving parts increases exponentially, and the extension stroke of conventional telescopic motion mechanisms is limited by the length of the drive unit structure, making it impossible to achieve efficient large-span extension and contraction.
[0004] Therefore, there is an urgent need to develop a new type of transmission mechanism that can effectively reduce structural complexity, reduce power source dependence, and increase telescopic stroke while maintaining the same motion accuracy. Utility Model Content
[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a push-pull chain drive mechanism that can effectively reduce structural complexity, reduce power source dependence, and increase telescopic stroke while maintaining the same motion accuracy.
[0006] To achieve the above objectives, a push-pull chain drive mechanism is designed, comprising: a first slide rail assembly and a second slide rail assembly arranged parallel to the lower side; a cylinder is provided on the left side of the first slide rail assembly, and the piston rod at the front of the cylinder is connected to the front end of the first slide rail assembly; a slider is provided on the second slide rail assembly and slides in cooperation with the first slide rail assembly; a base, the cylinder is fixedly disposed on the lower side of the base, and the first slide rail assembly is disposed on the lower side of the base and slides in cooperation with the base; a fixed sprocket group and an adjustable sprocket group are respectively provided on the front and rear parts of the right side of the first slide rail assembly, and sprockets are respectively provided on the fixed sprocket group and the adjustable sprocket group parallel to the first slide rail assembly; a chain is disposed on the right side of the first slide rail assembly, with both ends respectively sleeved on the sprockets of the fixed sprocket group and the adjustable sprocket group; a chain fixing seat is provided on the front part of the upper side of the chain, and the top of the chain fixing seat is fixedly connected to the base; a chain connecting plate is provided on the rear part of the right side of the second slide rail assembly, and the top of the chain connecting plate is fixedly connected to the rear part of the lower side of the chain.
[0007] Preferably, the present invention further includes: a tooling is fixedly provided on the lower side of the second slide rail assembly, which moves with the movement of the second slide rail assembly.
[0008] Preferably, the present invention further includes: a first proximity switch provided at the lower part of the connection between the piston rod at the front of the cylinder and the first slide rail assembly, and a second proximity switch provided at the rear of the cylinder, for detecting the movement and displacement of the first slide rail assembly.
[0009] Preferably, the present invention further includes: a third proximity switch is provided at the bottom of the second slide rail assembly, which is used to cooperate with the first proximity switch and the second proximity switch to detect the movement and displacement of the second slide rail assembly.
[0010] Preferably, the present invention further includes: a first drag chain, with its two ends respectively connected to the connection point between the cylinder piston rod and the first slide rail assembly and the base, for accommodating the guide air pipe and the wire.
[0011] Preferably, the present invention further includes: a second drag chain, with tooling and a base connected to both ends respectively, for accommodating the guide air tube and the wire.
[0012] Preferably, the present invention further includes: the adjustable sprocket assembly is provided with several parallel front-to-back slots, the bolt passes through the slots and is threadedly connected to the first slide rail assembly, the bolt can be moved back and forth in the slots for adjustment, and the position of the bolt in the slots is fixed by tightening the nut on the bolt, so as to adjust the chain tension by means of the adjustable sprocket assembly and the nut bolt.
[0013] Compared with the prior art, the advantages of this utility model are:
[0014] 1. High precision: Through optimized design, the structure can achieve high-precision linear telescopic motion, effectively improving the accuracy and stability of operation, and is suitable for application scenarios with high precision requirements.
[0015] 2. Excellent linkage: Through reasonable mechanical coordination, this structure ensures coordinated action between various components, achieving efficient linkage and meeting motion requirements under complex working conditions.
[0016] 3. High flexibility: The structural design is highly adaptable and can be adjusted according to the needs of different working scenarios. It is suitable for various automated production lines and material conveying applications that require linear motion.
[0017] 4. Wide range of applications: This structure is particularly suitable for fields that require high-precision linear telescopic motion, such as automated assembly lines, material handling systems, and other industrial scenarios with high requirements for motion accuracy and stability.
[0018] 5. Limitations and Precautions: Although the structure has the advantages mentioned above, its design complexity is high, and it is heavily reliant on cylinders, which may lead to increased costs. Furthermore, due to the wear characteristics of mechanical components, regular maintenance is required to ensure long-term stable operation. Therefore, during the design and use process, it is necessary to comprehensively evaluate the technical advantages and limitations based on specific needs, and strictly control installation accuracy and maintenance management to fully realize its technical effectiveness. Attached Figure Description
[0019] Figure 1 This is a front view of the present invention;
[0020] Figure 2 This is a bottom view of the present invention;
[0021] Figure 3 This is an isometric drawing of this utility model;
[0022] In the diagram: 1 cylinder, 2 first slide rail assembly, 3 second slide rail assembly, 4 chain, 5 fixed sprocket assembly, 6 adjustable sprocket assembly, 7 chain fixing seat, 8 chain connecting plate, 9 first proximity switch, 9.1 second proximity switch, 9.2 third proximity switch, 10 first cable chain, 10.1 second cable chain, 11 tooling, 12 base. Detailed Implementation
[0023] To make the purpose, principle and structure of this utility model clearer, the following description is provided in conjunction with the accompanying drawings and specific embodiments.
[0024] like Figures 1 to 3 As shown, this embodiment provides a push-pull chain drive mechanism, including a base 12, a cylinder 1, a first slide rail assembly 2, a second slide rail assembly 3, and a chain drive system.
[0025] The base 12 serves as an installation reference, with a cylinder 1 fixedly mounted on its lower side. The front end of the piston rod of the cylinder 1 is rigidly connected to the front end of the first slide rail assembly 2. The first slide rail assembly 2 and the base 12 achieve axial sliding engagement through a linear slide rail. The second slide rail assembly 3 is arranged parallel to the bottom of the first slide rail assembly 2, and the two form a sliding engagement through a slider assembly. A fixture 11 is fixedly attached to the bottom of the second slide rail assembly 3 to support an external actuator.
[0026] In the chain drive system, a fixed sprocket set 5 and an adjustable sprocket set 6 are respectively installed at the front and rear ends of the right side of the first slide rail assembly 2. The chain 4 forms a closed-loop transmission path around the fixed sprocket set 5 and the adjustable sprocket set 6. The fixed sprocket set 5 is rigidly connected to the first slide rail assembly 2 through a mounting plate with bolt holes, while the adjustable sprocket set 6 is connected to the first slide rail assembly 2 through a mounting plate with a through groove. The through groove extends along the length (or axial direction) of the first slide rail assembly 2. Bolts pass through the through groove and engage with the threaded holes of the first slide rail assembly 2. By tightening the nut at the end of the bolt, the axial position of the adjustable sprocket set 6 is locked, thereby adjusting the tension of the chain 4.
[0027] The upper chain segment of chain 4 is fixed to the base 12 via chain fixing seat 7 at the front; the lower chain segment is rigidly connected to the rear right side of the second slide rail assembly 3 via chain connecting plate 8 at the rear. When cylinder 1 drives the first slide rail assembly 2 to move linearly relative to the base 12, chain 4 drives the second slide rail assembly 3 to generate synchronous displacement, realizing the push-pull movement of tooling 11.
[0028] Furthermore, a first proximity switch 9 is provided below the connection between the piston rod of cylinder 1 and the first slide rail assembly 2, a second proximity switch 9.1 is installed at the tail of cylinder 1, and a third proximity switch 9.2 is provided at the bottom of the second slide rail assembly 3. The three switches work together to detect the extreme positions and movement states of the first slide rail assembly 2 and the second slide rail assembly 3.
[0029] To optimize the pipeline layout, a first drag chain 10 is installed between the piston rod of cylinder 1 and the first slide rail assembly 2 and the base 12, and a second drag chain 10.1 is installed between the tooling 11 and the base 12, respectively, to constrain the bending paths of the air pipe and the wire and prevent motion interference.
[0030] Working principle:
[0031] When cylinder 1 extends, the first slide rail assembly 2 slides forward along the base 12 under the drive of cylinder 1, causing the chain 4 to move forward as a whole. Since the chain fixing seat 7 is rigidly fixed to the base 12 by bolts, the forward movement of the first slide rail assembly 2 forces the fixed sprocket assembly 5 and the adjustable sprocket assembly 6 to rotate synchronously, which in turn pulls the second slide rail assembly 3 forward through the chain connecting plate 8. At this time, the tooling 11 fixed on the lower side of the second slide rail assembly 3 extends outward synchronously with it, completing the push-pull action. When cylinder 1 retracts, the first slide rail assembly 2 moves backward, and the chain 4 reverses its transmission, causing the second slide rail assembly 3 to drive the tooling 11 back below the base 12, forming a synchronous extension and retraction mechanism.
[0032] Pipeline management: The two ends of the second cable chain 10.1 are anchored to the side of tooling 11 and the rear of base 12 respectively. See Appendix Figure 3Its internal serpentine cavity covers pneumatic pipelines and electrical cables. During the extension and retraction of tooling 11, the second drag chain 10.1 guides the pipelines to be extended and retracted in an orderly manner through pre-bending arc, avoiding interference and wear between the cables and moving parts.
[0033] Position detection: The first proximity switch 9 is installed below the piston rod hinge point of cylinder 1 and triggers a signal when the first slide rail assembly 2 moves to the front limit position; the second proximity switch 9.1 is located at the tail of cylinder 1 and is used to detect the retraction end point; the third proximity switch 9.2 is fixed in the middle of the bottom of the second slide rail assembly 3. The three are logically linked to form a two-stage position verification system. When the fixture 11 extends or retracts to the end of the preset stroke, the proximity switch group outputs a position signal to the controller.
[0034] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and novel concept of this utility model, should be included within the protection scope of this utility model.
Claims
1. A push-pull chain drive mechanism, characterized in that, include: A first slide rail assembly and a second slide rail assembly arranged parallel to the lower side. A cylinder is provided on the left side of the first slide rail assembly. The piston rod on the front side of the cylinder is connected to the front end of the first slide rail assembly. A slider is provided on the second slide rail assembly to slide and cooperate with the first slide rail assembly. The base and the cylinder are fixedly installed on the lower side of the base, and the first slide rail assembly is installed on the lower side of the base and slides in cooperation with the base; The front and rear parts of the right side of the first slide rail assembly are respectively provided with a fixed sprocket group and an adjustable sprocket group, and sprockets are respectively provided on the fixed sprocket group and the adjustable sprocket group parallel to the first slide rail assembly; The chain is located on the right side of the first slide rail assembly, with its two ends respectively fitted onto the sprockets of the fixed sprocket group and the adjustable sprocket group. A chain fixing seat is provided on the front part of the upper side of the chain, and the top of the chain fixing seat is fixedly connected to the base. The second slide rail assembly has a chain connecting plate on the right rear side, and the top of the chain connecting plate is fixedly connected to the rear of the lower side of the chain.
2. The push-pull chain drive mechanism as described in claim 1, characterized in that, A fixture is fixedly installed on the lower side of the second slide rail assembly, which moves with the movement of the second slide rail assembly.
3. The push-pull chain drive mechanism as described in claim 1, characterized in that, A first proximity switch is provided at the lower part of the connection between the piston rod at the front of the cylinder and the first slide rail assembly, and a second proximity switch is provided at the rear of the cylinder, for detecting the movement and displacement of the first slide rail assembly.
4. A push-pull chain drive mechanism as described in claim 3, characterized in that, The bottom of the second slide rail assembly is provided with a third proximity switch, which is used in conjunction with the first and second proximity switches to detect the movement and displacement of the second slide rail assembly.
5. A push-pull chain drive mechanism as described in claim 1, characterized in that, The first cable chain has its two ends connected to the cylinder piston rod and the first slide rail assembly connection point and the base, respectively, and is used to accommodate the guide air pipe and the wire.
6. A push-pull chain drive mechanism as described in claim 1, characterized in that, The second cable chain, with tooling and a base connected at both ends, is used to accommodate the guide tube and wires.
7. A push-pull chain drive mechanism as described in claim 1, characterized in that, The adjustable sprocket assembly has several parallel, forward and backward slotted through grooves. Bolts pass through the through grooves and are threadedly connected to the first slide rail assembly. The bolts can move back and forth within the through grooves for adjustment, and the position of the bolts within the through grooves is fixed by tightening the nuts on the bolts. This allows for adjustment of the chain tension through the adjustable sprocket assembly and the nut bolts.