A multi-point cooperative loading device

Abstract

The utility model provides a kind of multipoint formula collaborative loading device, including ball screw pair, the radial outside of nut in ball screw pair is equipped with driven gear;A plurality of driving assembly that can synchronously drive the driven gear, the driving assembly is sequentially spaced along the circumference of the nut, it is provided with the mounting direction parallel to the axis direction of the nut on the driving assembly, the driving assembly includes sequentially connected driving motor, speed reducer and driving gear along mounting direction.The multipoint formula collaborative loading device, a plurality of driving assembly is used to synchronously drive ball screw pair, driving motor, speed reducer and driving gear in single driving assembly can reduce its specification due to the reduction of driving torque, driven gear is further reduced in outer diameter size compared with single-point drive due to the adoption of driving assembly multipoint synchronous drive, it is convenient to select and arrange, reduce the difficulty of design and manufacture, avoid that the application and popularization of testing machine are limited.

Description

Technical Field

[0001] This utility model relates to the field of loading test technology, and in particular to a multi-point collaborative loading device. Background Technology

[0002] Electronic universal testing machines, tensile testing machines, and compression testing machines are widely used. With the rapid development of the market economy, the demand for high-capacity electronic testing machines is becoming increasingly urgent. Among them, electronic testing machines have the characteristics of high efficiency, energy saving, and green environmental protection. Replacing hydraulic testing machines is the future development direction of testing machines. In large-scale national projects in aerospace, military research, transportation and other sectors, electric transmission structures have been continuously developed and are gradually replacing the polluting and poorly controllable hydraulic drives, which has been widely recognized by all sectors of society.

[0003] The existing electronic testing machines have the following drawbacks in application:

[0004] Traditional electronic testing machines use a transmission structure with a pair of gears to achieve final stage drive, meaning the gears drive at a single point. Because a large driving torque is required, the transmission structure is large in size, which makes its design and manufacturing difficult and limits the application and promotion of the testing machine.

[0005] Therefore, in order to solve the above problems, this utility model proposes a multi-point cooperative loading device that can reduce the size of the transmission structure. Utility Model Content

[0006] To address the problems existing in the prior art, this utility model provides a multi-point collaborative loading device.

[0007] According to one objective of this utility model, this utility model provides a multi-point cooperative loading device, including a ball screw pair, wherein a driven gear is sleeved on the radial outer side of the nut in the ball screw pair;

[0008] A plurality of drive assemblies capable of synchronously driving the driven gear are arranged sequentially at intervals along the circumference of the nut. Each drive assembly has an installation direction parallel to the axis of the nut. Each drive assembly includes a drive motor, a reducer, and a drive gear connected sequentially along the installation direction. The drive gear and the driven gear mesh with each other.

[0009] The radial dimension of the drive gear is no greater than half the radial dimension of the driven gear, and the radial outer sides of the drive gear, the radial outer sides of the drive motor, and the radial outer sides of the reducer are nearly flush.

[0010] Preferably, there are two drive components, with one drive component disposed on each of the radially opposite sides of the nut.

[0011] Preferably, the output shaft of the drive motor and the input shaft of the reducer are directly connected;

[0012] The drive gear is mounted on the output shaft of the reducer, and a drive support bearing is provided at the end of the output shaft of the reducer.

[0013] Preferably, the driving gear and the driven gear form a gear set for speed reduction transmission.

[0014] Preferably, the driven gear and the ball screw pair form a nut assembly, and a pair of driven support bearings are mounted on the assembly, the driven support bearings being respectively disposed on both sides of the assembly in the axial direction.

[0015] Preferably, the driven support bearing is divided into bearing one and bearing two;

[0016] The bearing is provided between one side of the driven gear along the axial direction and the radial outer side of the nut;

[0017] A notch is provided on the other side of the driven gear along the axial direction, which connects to the inside of the driven gear, and the bearing is embedded in the notch.

[0018] Preferably, the drive motor is a servo motor.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] This multi-point collaborative loading device uses multiple drive components to synchronously drive the ball screw pair. The drive motor, reducer and drive gear in a single drive component can be reduced in size due to the reduction in drive torque. The driven gear can be further reduced in outer diameter compared to single-point drive due to the use of multi-point synchronous drive components, which facilitates selection and arrangement, reduces design and manufacturing difficulty, and avoids restrictions on the application and promotion of the testing machine.

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0022] Figure 1 This is an overall schematic diagram of a multi-point collaborative loading device according to the present invention. Detailed Implementation

[0023] The following description is intended to provide a detailed account of the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0024] See Figure 1 This utility model provides a technical solution: a multi-point cooperative loading device, comprising:

[0025] A ball screw assembly 100, wherein a driven gear 200 is sleeved on the radial outer side of the nut 101 in the ball screw assembly 100;

[0026] A plurality of drive assemblies 300 capable of synchronously driving the driven gear 200 are arranged sequentially at intervals along the circumference of the nut 101. Each drive assembly 300 has an installation direction parallel to the axis of the nut 101. Each drive assembly 300 includes a drive motor 301, a reducer 302, and a drive gear 303 connected sequentially along the installation direction. The drive gear 303 meshes with the driven gear 200.

[0027] The radial dimension of the drive gear 303 is no greater than half the radial dimension of the driven gear 200, and the radial outer sides of the drive gear 303, the radial outer sides of the drive motor 301, and the radial outer sides of the reducer 302 are nearly flush.

[0028] In this embodiment, there are two drive components 300. One drive component 300 is respectively provided on each of the radially opposite sides of the nut 101. The drive motor 301, reducer 302 and drive gear 303 have their specifications halved due to the halving of the drive torque. The driven gear 200 has its outer diameter reduced by half compared to the single-point drive size due to the adoption of synchronous drive at two points as shown in the figure. In other embodiments, multiple points include two points, three points, four points or even more points.

[0029] This multi-point collaborative loading device uses multiple drive components 300 to synchronously drive the ball screw pair 100. The drive motor 301, reducer 302 and drive gear 303 in a single drive component 300 can be reduced in size due to the reduction in drive torque. The driven gear 200 can be further reduced in outer diameter compared to single-point drive due to the use of multi-point synchronous drive of drive components 300, which facilitates selection and arrangement, reduces design and manufacturing difficulty, and avoids restrictions on the application and promotion of the testing machine.

[0030] Furthermore, the drive motor 301 is a servo motor, and the output shaft of the drive motor 301 is directly connected to the input shaft of the reducer 302;

[0031] The drive gear 303 is mounted on the output shaft of the reducer 302. The end of the output shaft of the reducer 302 is provided with a drive support bearing 3021. Adding a bearing can improve the support rigidity and ensure the transmission accuracy.

[0032] The driving gear 303 and the driven gear 200 form a gear set for speed reduction transmission;

[0033] The driven gear 200 and the nut 101 of the ball screw pair form an assembly. A pair of driven support bearings 400 are mounted on the assembly and form its support. The driven support bearings 400 are respectively arranged on both sides of the assembly in the axial direction. Specifically, the driven support bearings 400 are divided into bearing one 401 and bearing two 402.

[0034] The bearing 401 is provided between one side of the driven gear 200 in the axial direction and the radial outer side of the nut 101;

[0035] The driven gear 200 has a notch on the other side of its axial direction that connects to the inside of the driven gear 200, and the bearing 402 is embedded in the notch.

[0036] How to use:

[0037] The drive motor 301 on the drive assembly 300 synchronously drives the drive wheel to rotate. The drive wheel drives the nut 101 to rotate via the driven wheel. The rotation of the nut 101 of the ball screw pair drives its screw to perform linear motion, thereby completing the linear loading and unloading of the sample installed on the testing machine, and thus testing the mechanical properties of the sample.

[0038] In summary, the core of this multi-point collaborative loading device is an electric transmission structure, which is controlled by a servo motor. The final stage of the transmission implements multi-point power distribution, which makes the heavy-duty transmission components smaller, thereby avoiding the problem of excessively large equipment size, which would lead to manufacturing difficulties and loss of market competitiveness.

[0039] The testing machine with a multi-point synchronous loading device has a simpler structure, smaller transmission components, and is easier to manufacture.

[0040] This device can be used to manufacture high-capacity testing machines, such as presses, tensile testing machines, and universal testing machines, suitable for mechanical property testing of metallic and non-metallic materials, components, and parts.

[0041] The embodiments described above are only used to illustrate the technical ideas and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. The scope of patent application of this utility model should not be limited by these embodiments. That is, any equivalent changes or modifications made in accordance with the spirit disclosed in this utility model still fall within the patent scope of this utility model.

Claims

1. A multi-point cooperative loading device, characterized in that, include: A ball screw pair (100) wherein a driven gear (200) is sleeved on the radial outer side of the nut (101) in the ball screw pair (100); A plurality of drive assemblies (300) capable of synchronously driving the driven gear (200) are arranged sequentially at intervals along the circumference of the nut (101). Each drive assembly (300) has an installation direction parallel to the axis of the nut (101). Each drive assembly (300) includes a drive motor (301), a reducer (302), and a drive gear (303) connected sequentially along the installation direction. The drive gear (303) meshes with the driven gear (200). The radial dimension of the drive gear (303) is no greater than half the radial dimension of the driven gear (200), and the radial outer sides of the drive gear (303), the radial outer sides of the drive motor (301), and the radial outer sides of the reducer (302) are nearly flush.

2. The multi-point cooperative loading device according to claim 1, characterized in that, The number of drive components (300) is two, and one drive component (300) is respectively provided on each of the radially opposite sides of the nut (101).

3. The multi-point cooperative loading device according to claim 1, characterized in that, The output shaft of the drive motor (301) and the input shaft of the reducer (302) are directly connected; The drive gear (303) is mounted on the output shaft of the reducer (302), and a drive support bearing (3021) is provided at the end of the output shaft of the reducer (302).

4. A multi-point cooperative loading device according to claim 1, characterized in that, The drive gear (303) and the driven gear (200) form a gear set for speed reduction transmission.

5. A multi-point cooperative loading device according to claim 1, characterized in that, The driven gear (200) and the nut (101) of the ball screw pair form an assembly, and a pair of driven support bearings (400) are mounted on the assembly, which are respectively disposed on both sides of the assembly in the axial direction.

6. A multi-point cooperative loading device according to claim 5, characterized in that, The driven support bearing (400) is divided into bearing one (401) and bearing two (402); The bearing (401) is provided between one side of the driven gear (200) in the axial direction and the radial outer side of the nut (101); A notch is provided on the other side of the driven gear (200) in the axial direction, which connects to the inside of the driven gear (200), and the bearing (402) is embedded in the notch.

7. A multi-point cooperative loading device according to claim 1, characterized in that, The drive motor (301) is a servo motor.

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