A cantilevered tri-axial truss mechanism
By introducing columns, telescopic cylinders, and housing frame structures into the cantilevered three-axis truss, combined with servo motor drive and protective frame design, the torque imbalance problem of the cantilevered three-axis truss under load is solved, improving the stability and service life of the device.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGZHOU SEVENTH AXIS ROBOT EQUIP CO LTD
- Filing Date
- 2025-07-22
- Publication Date
- 2026-07-21
AI Technical Summary
Existing cantilevered three-axis trusses generate large torques when under load, leading to unbalanced stress on components and affecting the service life of the device.
The device employs a structure consisting of a column, telescopic cylinder, connecting plate, and receiving frame. By adjusting the position of the counterweight within the receiving frame, the torque of the crossbeam is balanced. Simultaneously, a servo motor and synchronous belt drive assembly are used, with a protective frame protecting the synchronous belt, thereby increasing the stability and flexibility of the device.
It effectively balances the torque of the cantilevered three-axis truss under load, extends the service life of the device, and improves the durability of the drive components and the flexibility of installation.
Smart Images

Figure CN224529761U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of three-axis truss technology, and in particular to a cantilever three-axis truss mechanism. Background Technology
[0002] A three-axis truss is a spatial structure system designed based on a three-dimensional rectangular coordinate system (X, Y, Z axes). It achieves efficient spatial positioning and load bearing through the combination of members in three directions and is widely used in industrial automation, building support, and large-scale event construction.
[0003] A cantilevered three-axis truss is a three-axis truss in which some axes employ a cantilever structure. In existing technologies, a single horizontal axis often uses a cantilever structure. However, due to the cantilever structure, the device generates significant torque under load, placing high demands on the strength of the components and the fixing structure. Long-term eccentric loading can also reduce the effective service life of the device. Therefore, an improved cantilevered three-axis truss mechanism is proposed. Utility Model Content
[0004] The purpose of this invention is to at least solve one of the aforementioned technical defects.
[0005] Therefore, one objective of this utility model is to propose a cantilevered three-axis truss mechanism to solve the problems mentioned in the background art and overcome the shortcomings of the existing technology.
[0006] To achieve the above objectives, one embodiment of this utility model provides a cantilevered three-axis truss mechanism, including a column, a crossbeam fixedly connected to the top of the column, a Y-axis drive assembly on the crossbeam, a Y-axis movable frame that can be driven by the Y-axis drive assembly on the crossbeam, an X-axis drive assembly on the Y-axis movable frame, an X-axis movable frame that can be driven by the X-axis drive assembly on the Y-axis movable frame, a Z-axis drive assembly on the X-axis movable frame, and a movable seat that can be driven by the Z-axis drive assembly on the X-axis movable frame; a mounting base is fixedly connected to the side of the crossbeam without the movable frame, a telescopic cylinder is provided in the mounting base, a connecting plate is fixedly connected to the output end of the telescopic cylinder, and a receiving frame is fixedly connected to the connecting plate.
[0007] Preferably, in any of the above embodiments, there are two columns, which are respectively set at both ends of the crossbeam, and a fixing plate is fixedly connected to the bottom end of the column.
[0008] The above technical solution employs the following: The uprights provide support for the crossbeam, ensuring its stability. Two uprights support the crossbeam at both ends, further enhancing its stability. Fixing plates are installed at the bottom of the uprights to facilitate securing them to the ground or other foundations.
[0009] Preferably, in any of the above solutions, the Y-axis drive assembly, X-axis drive assembly, and Z-axis drive assembly all adopt a drive method using a servo motor in conjunction with a synchronous belt and guide rail.
[0010] The above technical solution involves setting up a Y-axis drive assembly, an X-axis drive assembly, and a Z-axis drive assembly, which respectively drive the Y-axis movable frame, the X-axis movable frame, and the moving base to move in the Y-axis, X-axis, and Z-axis directions. The drive assembly uses a servo motor in conjunction with a synchronous belt and guide rail. Synchronous belt drive has advantages such as smooth transmission, low noise, and no need for lubrication, making it suitable for medium to low loads and long-distance conveying applications.
[0011] Preferably, protective frames are provided on the crossbeam, the Y-axis movable frame, and the X-axis movable frame, as described in any of the above schemes.
[0012] The above technical solution involves setting a protective frame at the corresponding location. The protective frame can protect the timing belt of the drive component, preventing damage to the timing belt caused by accidental contact with foreign objects, which is beneficial to the long-term use of the drive component.
[0013] Preferably, as described in any of the above schemes, the side of the crossbeam is provided with several positioning holes, and the mounting base is fixedly connected to the crossbeam by bolts through the positioning holes on the crossbeam.
[0014] The above technical solution provides a mounting platform for the telescopic cylinder. Positioning holes are made on the side of the crossbeam to facilitate fixing the mounting base to the crossbeam. The presence of multiple positioning holes allows workers to adjust the position of the mounting base as needed, making it more flexible to use.
[0015] Preferably, in any of the above solutions, the telescopic cylinder is an electric multi-stage telescopic cylinder, and a transition plate is provided between the connecting plate and the output end of the telescopic cylinder.
[0016] The above technical solution employs a telescopic cylinder to move the receiving frame horizontally, adjusting the distance between the receiving frame and the crossbeam. The telescopic cylinder utilizes a multi-stage structure, significantly increasing its extension length. A transition plate is installed between the connecting plate and the telescopic cylinder to facilitate load transfer between them.
[0017] Preferably, one side of the receiving frame is fixedly connected to a wing plate, which is then fixedly connected to the connecting plate via bolts.
[0018] The above technical solution employs a receiving frame to hold the counterweight. The weight of the counterweight is transmitted to the crossbeam via a telescopic cylinder and the receiving frame, subjecting the crossbeam to a torque in another direction. This balances the torque generated during equipment operation, resulting in balanced forces on both sides of the crossbeam, which is beneficial for the long-term use of the device. The distance between the receiving frame, the counterweight within it, and the crossbeam is adjusted using the telescopic cylinder. The distance changes, but the weight remains constant, allowing the torque on the crossbeam to be adjusted according to the load, resulting in a more balanced force distribution.
[0019] Compared with the prior art, the advantages and beneficial effects of this utility model are as follows: 1. This cantilevered three-axis truss mechanism, through the installation of mounting bases, telescopic cylinders, connecting plates, and receiving frames, allows for the placement of counterweights within the receiving frames according to the load size during operation. When the device is working, the load generates torque on the crossbeam. The weight of the counterweights is transmitted to the crossbeam through the telescopic cylinders and the receiving frame, causing the crossbeam to experience torque in another direction. This balances the torque generated during operation, resulting in balanced forces on both sides of the crossbeam, which is beneficial for the long-term use of the device. The distance between the receiving frame, the counterweights within it, and the crossbeam can be adjusted using the telescopic cylinders. The distance changes while the weight remains constant, allowing the torque on the crossbeam to be adjusted according to the load, resulting in more balanced forces.
[0020] 2. This cantilevered three-axis truss mechanism features protective frames at corresponding positions. These frames protect the timing belt of the drive assembly, preventing damage from accidental contact with foreign objects and contributing to the long-term use of the drive assembly. Positioning holes are provided on the side of the crossbeam to facilitate the fixing of the mounting base to the crossbeam. The presence of multiple positioning holes allows for adjustments to the mounting base position as needed, making it more flexible to use.
[0021] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0022] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a first-view structural diagram of the present invention; Figure 2 This is a schematic diagram of the second-view structure of the present invention; Figure 3 This is a schematic diagram of the third-view structure of this utility model; Figure 4 This is a schematic diagram of the telescopic cylinder of this utility model.
[0023] In the diagram: 1-Column, 2-Beam, 3-Y-axis drive assembly, 4-Y-axis movable frame, 5-X-axis drive assembly, 6-X-axis movable frame, 7-Z-axis drive assembly, 8-Mounting base, 9-Telescopic cylinder, 10-Connecting plate, 11-Receiving frame. Detailed Implementation
[0024] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.
[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0026] like Figures 1-4 As shown, this utility model includes a column 1, a crossbeam fixedly connected to the top of the column 1, a Y-axis drive assembly 3 on the crossbeam 2, a Y-axis movable frame 4 that can be driven by the Y-axis drive assembly 3 on the crossbeam 2, an X-axis drive assembly 5 on the Y-axis movable frame 4, an X-axis movable frame 6 that can be driven by the X-axis drive assembly 5 on the Y-axis movable frame 4, a Z-axis drive assembly 7 on the X-axis movable frame 6, and a movable seat that can be driven by the Z-axis drive assembly 7 on the X-axis movable frame 6; a mounting base 8 is fixedly connected to the side of the crossbeam 2 where the movable frame 4 is not located, a telescopic cylinder 9 is installed inside the mounting base 8, a connecting plate 10 is fixedly connected to the output end of the telescopic cylinder 9, and a receiving frame 11 is fixedly connected to the connecting plate 10.
[0027] Example 1: Two columns 1 are respectively set at both ends of the crossbeam 2, and a fixing plate is fixedly connected to the bottom end of the column 1. The column 1 provides support for the crossbeam 2, ensuring the stability of the crossbeam 2. The two columns 1 support the crossbeam 2 at both ends, making the crossbeam 2 more stable. The fixing plate at the bottom end of the column 1 makes it easy to fix the column 1 to the ground or other foundation. The Y-axis drive assembly 3, X-axis drive assembly 5, and Z-axis drive assembly 7 all adopt a servo motor combined with a synchronous belt and guide rail drive method. By setting the Y-axis drive assembly 3, X-axis drive assembly 5, and Z-axis drive assembly 7, the three drive the Y-axis movable frame 4, X-axis movable frame 6, and moving seat respectively to move in the Y-axis, X-axis, and Z-axis directions. The drive assembly adopts a servo motor combined with a synchronous belt and guide rail drive method. Synchronous belt drive has the advantages of smooth transmission, low noise, and no lubrication required, and is suitable for medium and low load and long-distance conveying applications.
[0028] Example 2: Protective frames are installed on the crossbeam 2, the Y-axis movable frame 4, and the X-axis movable frame 6. These protective frames at corresponding positions protect the timing belt of the drive assembly, preventing damage from accidental contact by foreign objects and promoting the long-term use of the drive assembly. Several positioning holes are provided on the side of the crossbeam 2. The mounting base 8 is fixedly connected to the crossbeam 2 by bolts through these positioning holes. The mounting base 8 provides an installation platform for the telescopic cylinder 9. The positioning holes on the side of the crossbeam 2 provide conditions for fixing the mounting base 8 to the crossbeam 2, and the multiple positioning holes allow for adjustments to the position of the mounting base 8 as needed, making it more flexible to use.
[0029] Example 3: The telescopic cylinder 9 is an electric multi-stage telescopic cylinder, and a transition plate is provided between the connecting plate 10 and the output end of the telescopic cylinder 9. The telescopic cylinder 9 is used to drive the receiving frame 11 to move horizontally, adjusting the distance between the receiving frame 11 and the crossbeam 2. The telescopic cylinder 9 adopts a multi-stage structure, which greatly increases its extension length. The transition plate is provided between the connecting plate 10 and the telescopic cylinder 9 to facilitate load transfer between the two. A wing plate is fixedly connected to one side of the receiving frame 11 and is fixedly connected to the connecting plate 10 through bolts. The receiving frame 11 is used to hold the counterweight. The weight of the counterweight is transferred to the crossbeam 2 through the telescopic cylinder 9 and the receiving frame 11, so that the crossbeam 2 is subjected to torque in another direction. This balances the torque generated during the operation of the equipment, thereby balancing the forces on both sides of the crossbeam 2, which is beneficial to the long-term use of the device. By using the telescopic cylinder 9 to adjust the distance between the receiving frame 11 and the counterweight inside it and the crossbeam 2, the distance changes but the weight remains the same, so that the torque on the crossbeam 2 can be adjusted according to the load, resulting in a more balanced force.
[0030] The working principle of this utility model is as follows: S1. Place the counterweight into the receiving frame 11 according to the load size; S2. When the device is working, the load generates torque on the crossbeam 2. The weight of the counterweight is transmitted to the crossbeam 2 through the telescopic cylinder 9 and the receiving frame 11, so that the crossbeam 2 is subjected to torque in another direction. This balances the torque generated when the device is working, thereby balancing the forces on both sides of the crossbeam 2. S3. Use the telescopic cylinder 9 to adjust the distance between the receiving frame 11 and its internal counterweight and the crossbeam 2. The distance changes, but the weight remains the same, so that the torque on the crossbeam 2 can be adjusted according to the load.
[0031] Compared with the prior art, the present invention has the following advantages: 1. This cantilevered three-axis truss mechanism, through the installation of a mounting base 8, a telescopic cylinder 9, a connecting plate 10, and a receiving frame 11, allows for the placement of counterweights into the receiving frame 11 according to the load size during operation. When the device is working, the load generates torque on the crossbeam 2. The weight of the counterweight is transmitted to the crossbeam 2 through the telescopic cylinder 9 and the receiving frame 11, causing the crossbeam 2 to experience torque in another direction. This balances the torque generated during operation, resulting in balanced forces on both sides of the crossbeam 2, which is beneficial for the long-term use of the device. The distance between the receiving frame 11 and the counterweight within it, and the crossbeam 2, can be adjusted using the telescopic cylinder 9. The distance changes, but the weight remains constant, allowing the torque on the crossbeam 2 to be adjusted according to the load, resulting in more balanced forces.
[0032] 2. This cantilevered three-axis truss mechanism features protective frames at corresponding positions. These frames protect the timing belt of the drive assembly, preventing damage from accidental contact with foreign objects and thus contributing to the long-term use of the drive assembly. Positioning holes are provided on the side of the crossbeam 2 to facilitate the fixing of the mounting base 8 to the crossbeam 2. The presence of multiple positioning holes allows for adjustments to the position of the mounting base 8 as needed, making it more flexible to use.
Claims
1. A cantilevered three-axis truss mechanism, comprising a column (1), wherein a crossbeam is fixedly connected to the top of the column (1); characterized in that, A Y-axis drive assembly (3) is provided on the crossbeam (2), a Y-axis movable frame (4) that can be driven by the Y-axis drive assembly (3) is provided on the crossbeam (2), an X-axis drive assembly (5) is provided on the Y-axis movable frame (4), an X-axis movable frame (6) that can be driven by the X-axis drive assembly (5) is provided on the Y-axis movable frame (4), a Z-axis drive assembly (7) is provided on the X-axis movable frame (6), and a movable seat that can be driven by the Z-axis drive assembly (7) is provided on the X-axis movable frame (6). The side of the crossbeam (2) without the movable frame (4) is fixedly connected to the mounting base (8), the mounting base (8) is provided with a telescopic cylinder (9), the output end of the telescopic cylinder (9) is fixedly connected to the connecting plate (10), and the connecting plate (10) is fixedly connected to the receiving frame (11).
2. The cantilevered three-axis truss mechanism as described in claim 1, characterized in that: There are two columns (1) and they are respectively set at both ends of the crossbeam (2). The bottom end of the column (1) is fixedly connected to a fixing plate.
3. The cantilevered three-axis truss mechanism as described in claim 2, characterized in that: The Y-axis drive assembly (3), X-axis drive assembly (5) and Z-axis drive assembly (7) all adopt a servo motor combined with a synchronous belt and guide rail drive method.
4. The cantilevered three-axis truss mechanism as described in claim 3, characterized in that: Protective frames are provided on the crossbeam (2), the Y-axis movable frame (4), and the X-axis movable frame (6).
5. The cantilevered three-axis truss mechanism as described in claim 1, characterized in that: The side of the crossbeam (2) has several positioning holes, and the mounting base (8) is fixedly connected to the crossbeam (2) by bolts through the positioning holes on the crossbeam (2).
6. The cantilevered three-axis truss mechanism as described in claim 5, characterized in that: The telescopic cylinder (9) is an electric multi-stage telescopic cylinder, and a transition plate is provided between the connecting plate (10) and the output end of the telescopic cylinder (9).
7. A cantilevered three-axis truss mechanism as described in claim 6, characterized in that: A wing plate is fixedly connected to one side of the receiving frame (11) and is fixedly connected to the connecting plate (10) by bolts through the wing plate.