Multi-angle adjustable mounting base for electric vibration test bed

Abstract

The application provides a multi-angle adjustable mounting base for an electric vibration test bed, and relates to the technical field of vibration test equipment. The mounting base comprises a base, a reference mounting plate, and at least two layers of ball-bowl pair adjusting mechanisms connected in series between the base and the reference mounting plate. Each adjusting mechanism comprises a fixed bowl-shaped cavity, a ball seat swingably seated in the cavity, and a press-lock ring pressed on the edge of the bowl-shaped cavity to limit the ball seat. On the press-lock ring, pushers with mutually perpendicular action directions are symmetrically installed. The end of the pusher acts on the ball seat of the corresponding layer. By independently driving the pushers of different layers to rise and fall, the ball seat of the corresponding layer is forced to swing around its ball center in a specific plane. Due to the series connection of the mechanisms, the swing of the lower layer changes the reference surface of the upper layer. The synthesis of the swing of the two layers finally drives the reference mounting plate to realize spatial multi-angle adjustment around two perpendicular axes. The application is flexible, convenient to disassemble, maintain and has strong universality, and can greatly improve the efficiency and accuracy of product posture simulation in vibration test.

Description

Technical Field

[0001] This invention relates to the field of vibration testing equipment technology, and in particular to a multi-angle adjustable mounting base for an electric vibration testing bench. Background Technology

[0002] An electric vibration test bench is a key piece of equipment used to simulate the vibration environment experienced by a product during transportation and use, in order to assess its reliability. During vibration testing, the product under test must be securely mounted on the vibration bench using clamps. Many products (such as automotive parts, aerospace components, and electronic equipment) are not installed horizontally or vertically in actual operation, but rather at a certain spatial angle. To realistically simulate their working conditions, the product must be installed at a specific angle and subjected to excitation during the test.

[0003] Currently, the common practice is to design and manufacture dedicated angle fixtures or tooling for specific angles. This method has significant drawbacks: First, it lacks versatility, as one type of fixture is only suitable for a fixed angle, resulting in a wide variety of fixtures and high management costs. Second, it is difficult to adjust, as each change of test angle requires disassembling and replacing the entire fixture set, as well as performing tedious re-alignment and balancing, which is inefficient and makes it difficult to achieve fine-tuning and control of the angle. Third, the rigidity, resonant frequency, and other characteristics of dedicated fixtures may not meet all test requirements, affecting test accuracy.

[0004] Therefore, there is an urgent need for a mounting base that can quickly and flexibly adjust and lock the product's installation angle, and has good versatility and rigidity, in order to meet the diverse and high-precision vibration testing needs of modern products. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the defects of inconvenient installation angle adjustment, low accuracy and poor versatility of vibration test products in the prior art, and to provide a multi-angle adjustable mounting base for electric vibration test bench with stable structure, flexible adjustment and convenient assembly and disassembly.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A multi-angle adjustable mounting base for an electric vibration test bench includes a base for connecting to the vibration table surface and a reference mounting plate for directly or via a clamp to mount the product. At least two layers of ball-and-socket adjustment mechanisms are connected in series between the base and the reference mounting plate, decoupling the complex spatial angle adjustment into independent swinging in two mutually perpendicular planes, and achieving precise adjustment through high-precision drive and closed-loop control.

[0007] Specifically, each layer of the ball-and-cup adjustment mechanism includes a bowl-shaped cavity, a ball seat, and a locking ring. The bowl-shaped cavity is fixedly installed; the spherical part of the ball seat is swayably seated within the hemispherical groove of the bowl-shaped cavity; the annular inner hole of the locking ring is fitted onto the neck of the ball seat or above the spherical part, and the bottom side of the locking ring is detachably pressed against the circumferential edge of the bowl-shaped cavity by a set of quick-release fasteners, thereby reliably limiting the ball seat within the bowl-shaped cavity, allowing it to swing freely around the center of the ball without coming out.

[0008] At least two such ball-and-socket adjustment mechanisms are connected in series from top to bottom, with adjacent layers rigidly connected by a base plate assembly. The ball seat of the top-level ball-and-socket adjustment mechanism is fixedly connected to the reference mounting plate.

[0009] To achieve angle-driven operation, two sets of jacking members are symmetrically installed on the locking rings of at least two layers of the ball-and-socket adjustment mechanism. The jacking members on adjacent locking rings act perpendicularly to each other in the direction of ball seat oscillation. The ends of the jacking members act on the corresponding ball seats. By driving the jacking members of different layers to rise and fall independently, the corresponding ball seats can oscillate around their center, thereby enabling the reference mounting plate to achieve multi-degree-of-freedom angle adjustment. Since the mechanism is connected in series, the oscillation of the lower ball seat changes the reference plane of the entire upper component, while the upper ball seat performs secondary fine-tuning within its own oscillation plane. The vector synthesis of the oscillations of these two layers is ultimately transmitted to the top reference mounting plate, enabling it to achieve compound rotation around two vertical axes (such as the X-axis and Y-axis), thereby achieving tilt angle adjustment in any direction within space.

[0010] Preferably, the ball-and-socket adjustment mechanism is configured in two layers, including a first-layer ball-and-socket adjustment mechanism and a second-layer ball-and-socket adjustment mechanism; the first-layer ball-and-socket adjustment mechanism includes: a first bowl-shaped cavity fixed on the base, a first ball seat sitting in the first bowl-shaped cavity, and a first locking ring fitted onto the first ball seat; the base plate assembly includes a second base plate fixed on the top of the first ball seat and a second base fixed on the second base plate, the second base plate having a second bowl-shaped cavity, the second ball seat sitting in the second bowl-shaped cavity and limited by the second locking ring, forming the second-layer ball-and-socket adjustment mechanism; the top of the second ball seat is fixedly connected to the reference mounting plate; the circumferential edge of the first bowl-shaped cavity is parallel to the first locking ring and the vibration table surface; the circumferential edge of the second bowl-shaped cavity is parallel to the second base plate and the second locking ring.

[0011] Furthermore, two sets of first pushers are symmetrically installed on the first locking ring to drive the first ball seat to swing around its center in a first plane perpendicular to the line connecting the two sets of first pushers; two sets of second pushers are symmetrically installed on the second locking ring to drive the second ball seat to swing around its center in a second plane perpendicular to the line connecting the two sets of second pushers; the first plane and the second plane are perpendicular to each other.

[0012] Furthermore, a first push ball and a second push ball are respectively fixed to the top ends of the first push member and the second push member; linear guide grooves for accommodating and guiding the first push ball and the second push ball are provided on the bottom side of the second base plate and the bottom side of the reference mounting plate.

[0013] Furthermore, the jacking components preferably employ high-precision, lockable drive elements such as electric push rods, servo electric cylinders, or hydraulic cylinders, and are all connected to a unified control unit. The control unit can receive commands and coordinate the independent and precise displacement of each jacking component.

[0014] Furthermore, the reference mounting plate is a multi-functional interface board equipped with a standardized array of mounting holes or a quick-clamping mechanism.

[0015] Furthermore, in the locking structure, the locking ring is indirectly pressed against the circumferential edge of the bowl-shaped cavity through a right-angle ring. A preferred specific structure of the locking device includes a T-shaped pressure rod and a locking bolt. The T-shaped pressure rod passes vertically through the right-angle ring and the circumferential edge of the bowl-shaped cavity in sequence and is inserted into the mounting hole of the base. A positioning hole is opened on the end of the rod. The locking bolt is screwed horizontally from the side wall of the base. Its end can be screwed into and pass through the positioning hole. By tightening the locking bolt, the T-shaped pressure rod can be locked in the radial direction, i.e., the horizontal direction. Thus, the head of the T-shaped pressure rod tightly presses the right-angle ring and the edge of the bowl-shaped cavity onto the base in the axial direction, i.e., the vertical direction. This structure is easy to assemble and disassemble, and has a large and reliable locking force.

[0016] The beneficial effects of this invention are: This invention employs a two-layer series ball-and-bowl sub-mechanism, combined with a vertically arranged drive and push component, to decompose the spatial angle adjustment into two linear orthogonal motions. The logic is clear, it is easy to achieve precise digital control, and the adjustment range is large with no dead angles. The ball-and-bowl joint of this invention has a large contact area and strong load-bearing capacity. After adjustment, the drive element is self-locking or fixed by an additional locking mechanism. Combined with the strong clamping force provided by locking fasteners such as T-shaped pressure rods, the entire mechanism forms a high-rigidity whole in the vibration environment, avoiding micro-movement and ensuring the accuracy of vibration transmission. The key components of this invention, such as the locking ring, ball seat, and cup-shaped cavity, adopt a standardized and detachable design. They can be quickly disassembled and replaced by loosening the locking bolts, which is convenient for maintenance and upkeep. It is also easy to replace friction pair components of different specifications or materials according to different load requirements. The standardized reference mounting plate interface of this invention enables it to be adapted to various existing fixtures and can be used as a universal platform for multi-angle vibration testing of various products, reducing the number and cost of special fixtures. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a front cross-sectional view of the present invention; Figure 2 yes Figure 1 Side view sectional view; Figure 3 This is a schematic diagram of the first compression ring; Figure 4 This is a schematic diagram of the second compression ring; Figure 5 yes Figure 1 A schematic diagram of the structure of the first ball seat rotating and swinging along the X-direction; Markings in the diagram: 100, Base; 110, First base plate; 120, First base; 130, First bowl-shaped cavity; 140, First locking ring; 141, First right-angle ring; 142, T-shaped pressure rod; 143, Locking bolt; 150, First ball seat; 151, First pusher; 152, First top ball; 160, Second base plate; 161, First linear guide groove; 200, Intermediate connecting structure; 210, Second base; 220, Second bowl-shaped cavity; 230, Second locking ring; 231, Second right-angle ring; 232, T-shaped pressure rod; 233, Locking bolt; 240, Second ball seat; 241, Second pusher; 242, Second top ball; 300, Reference mounting plate; 310, Second linear guide groove. Detailed Implementation

[0018] Example 1 This embodiment provides a specific two-layer series ball-and-bowl adjustment mechanism.

[0019] like Figure 1-5 As shown, the mounting base mainly consists of three parts: a base 100, an intermediate connecting structure 200, and a reference mounting plate 300.

[0020] The base 100 includes a first base plate 110. The first base plate 110 is locked onto the horizontal platform surface of the electric vibration test bench. A first base 120 is fixed on the first base plate 110. The top of the first base 120 is machined with a bowl-shaped fitting opening for receiving and fixing a first bowl-shaped cavity 130. The inner wall of the first bowl-shaped cavity 130 is a precision-machined hemispherical groove. The spherical part of the first ball seat 150 is placed inside the first bowl-shaped cavity 130. A first locking ring 140 is horizontally fitted above the neck of the spherical part of the first ball seat 150 through its annular inner hole. The bottom side of the first locking ring 140 is pressed against the circumferential edge of the first bowl-shaped cavity 130 by a first right-angle ring member 141.

[0021] The locking device includes a T-shaped pressure bar 142 and a locking bolt 143. The T-shaped pressure bar 142 passes vertically through the through hole on the first right-angle ring 141 and the through hole on the edge of the first cup-shaped cavity 130, and finally inserts into the corresponding mounting hole on the first base 120, which communicates with the threaded hole on the side. A radial positioning hole is provided on the end side of the T-shaped pressure bar 142. The locking bolt 143 is screwed horizontally into the side wall of the first base 120, and its threaded end can be screwed in all the way until it passes through the positioning hole on the T-shaped pressure bar 142. When the locking bolt 143 is tightened, its end radially locks the T-shaped pressure bar 142, preventing it from loosening upwards, thereby firmly pressing the first right-angle ring 141 and the edge of the first cup-shaped cavity 130 onto the first base 120 through the head of the T-shaped pressure bar 142. This structure ensures that the first ball seat 150 is reliably confined within the first cup-shaped cavity 130, and can swing freely but will not come out. During disassembly, simply unscrew the locking bolt 143, then pull the T-shaped pressure rod 142 upwards, thereby loosening the first locking ring 140.

[0022] The intermediate connecting structure 200 includes a second base plate 160 rigidly connected to the top of the first ball seat 150. A second base 210 is fixed on the second base plate 160. Similar to the first layer structure, a second bowl-shaped cavity 220 is mounted on the second base 210, in which a spherical second ball seat 240 sits. A second locking ring 230, through a second right-angle ring 231 and using the same T-shaped pressure bar and locking bolt structure, confines the second ball seat 240 within the second bowl-shaped cavity 220. The circumferential edge of the second bowl-shaped cavity 220 remains parallel to the bottom surface of the second base plate 160 and the second locking ring 230.

[0023] The reference mounting plate 300 is fixedly connected to the top of the second ball seat 240. The upper surface of the reference mounting plate 300 is preferably machined into a standardized grid of threaded holes or integrated with quick clamps for mounting various test products or special fixtures.

[0024] A first pusher 151 has a first pusher ball 152 fixed to its top end, and a second pusher 241 has a second pusher ball 242 fixed to its top end. Two parallel first linear guide grooves 161 are machined on the bottom side of the second base plate 160 to accommodate and guide the two first pusher balls 152. Two parallel second linear guide grooves 310 are machined on the bottom side of the reference mounting plate 300 to accommodate and guide the two second pusher balls 242. These guide grooves ensure smooth rolling of the pusher balls during ball seat oscillation and provide precise guidance.

[0025] Example 2 In this embodiment, the base 100 includes a first base plate 110 and a first base 120. The first base plate 110 is securely mounted on the vibration table surface. A first cup-shaped cavity 130 is mounted on the first base 120. The spherical portion of the first ball seat 150 is placed inside the first cup-shaped cavity 130. A first locking ring 140 is pressed against the edge of the first cup-shaped cavity 130 by a first right-angle ring 141 and locked using a locking fastener consisting of a T-shaped pressure rod 142 and a locking bolt 143, thereby limiting the position of the first ball seat 150.

[0026] A second base plate 160 is fixed to the top of the first ball seat 150. A second base 210 is mounted on the second base plate 160, and a second bowl-shaped cavity 220 is provided thereon. The second ball seat 240 is placed in the second bowl-shaped cavity 220 and is locked by a second locking ring 230, a second right-angle ring 231, and corresponding T-shaped pressure rods and locking bolts. The top of the second ball seat 240 is fixedly connected to the reference mounting plate 300.

[0027] Two sets of first pushers 151 are symmetrically mounted on the first locking ring 140 about the first ball seat 150, each with a first push ball 152 at its top. Two parallel first linear guide grooves 161 are formed on the bottom side of the second base plate 160 to accommodate and guide the first push balls 152. Two sets of second pushers 241 are symmetrically mounted on the second locking ring 230 about the second ball seat 240, each with a second push ball 242 at its top. Two parallel second linear guide grooves 310 are formed on the bottom side of the reference mounting plate 300 to accommodate and guide the second push balls 242. The line connecting the two sets of first pushers 151 is perpendicular to the line connecting the two sets of second pushers 241.

[0028] In this embodiment, a closed-loop control system is further integrated to achieve automatic angle adjustment. The first pusher 151 and the second pusher 241 are both servo electric cylinders, and an independent control unit is electrically connected to the driver of all servo electric cylinders.

[0029] A dual-axis tilt sensor, not shown in the figure, is installed on the reference mounting plate 300 as an angle sensing unit, and is used to measure the pitch and yaw angles of the reference mounting plate 300 relative to the horizontal plane in real time.

[0030] During operation, the operator inputs the target pitch and yaw angles through the human-machine interface of the control unit. The control unit receives real-time angle feedback signals from the dual-axis tilt sensors and compares them with the target values. The controller inside the control unit, such as a PLC, calculates the precise displacement required for each of the four servo electric cylinders based on the angle deviation using a preset motion control algorithm, and then issues control commands.

[0031] The servo electric cylinders operate in coordination according to commands: for example, to adjust the pitch angle, the control unit primarily drives the two second pushers 241 to extend and retract; to adjust the yaw angle, it primarily drives the two first pushers 151 to extend and retract. During the adjustment process, the feedback signal from the tilt sensor is continuously input to the control unit, forming a closed-loop control circuit, until the error between the actual angle of the reference mounting plate 300 and the target angle is less than the set threshold, at which point the adjustment automatically stops. The servo electric cylinders themselves have a position holding function, enabling reliable locking.

[0032] This embodiment achieves digitalization, automation, and high precision in angle adjustment, significantly improving the efficiency of test preparation and the repeatability accuracy of angle setting.

[0033] The working principle of this invention is as follows: In this invention, when it is necessary to adjust the tilt angle of the reference mounting plate 300 around the X-axis, the control unit drives the two sets of first pushers 151 to move, causing one to extend and the other to shorten synchronously by the same amount. The two first ball bearings 152 then rise and fall vertically, pushing the first ball bearing seat 150 to swing around its center in the XZ plane. Since the entire intermediate connecting structure 200 and the reference mounting plate 300 above the second base plate 160 are fixedly connected to the first ball bearing seat 150, they tilt as a whole around the X-axis. At this time, the second pusher 241 remains stationary, and the second ball bearing seat 240 is in a free state within the second bowl-shaped cavity 220, without relative oscillation.

[0034] When it is necessary to adjust the tilt angle of the reference mounting plate 300 about the Y-axis, the control unit drives the two sets of second pushers 241 to move, causing one to extend and the other to shorten. The two second push balls 242 move accordingly, pushing the second ball seat 240 to swing about its center in the YZ plane. Because the reference mounting plate 300 is fixedly connected to the second ball seat 240, the reference mounting plate 300 tilts about the Y-axis relative to the second base plate 160.

[0035] By coordinating the extension of the two sets of first pushers 151 and the two sets of second pushers 241 through the control unit 400, the swing angles around the X-axis and around the Y-axis can be vector-synthesized, thereby enabling the reference mounting plate 300 to obtain an inclination angle in any direction in space within the range of motion of the mechanism.

[0036] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-angle adjustable mounting base for an electric vibration test bench, characterized in that: It includes a base for connecting to a vibration table and a reference mounting plate for mounting the product, wherein at least two layers of ball-and-socket adjustment mechanisms are provided between the base and the reference mounting plate; Each layer of the ball-and-socket adjustment mechanism includes: Bowl-shaped cavity, fixed setting; The ball seat, the spherical part of which can swing, sits within the hemispherical groove of the bowl-shaped cavity; A locking ring, the annular inner hole of which is sleeved on the neck or spherical part of the ball seat, and the bottom side of the locking ring is detachably pressed against the circumferential edge of the cup-shaped cavity by a locking fastener, so as to confine the ball seat within the cup-shaped cavity; In at least two layers of the ball cup adjustment mechanism, adjacent layers are rigidly connected by a base plate assembly, and the ball seat of the ball cup adjustment mechanism at the top layer is fixedly connected to the reference mounting plate; Two sets of pushers are symmetrically installed on the locking rings of at least two layers of the ball cup adjustment mechanism. The pushers on the adjacent locking rings act on the ball seat swinging direction perpendicular to each other. The end of the pusher acts on the ball seat of the corresponding layer. By driving the pushers of different layers to rise and fall independently, the ball seat of the corresponding layer can swing around its center, thereby driving the reference mounting plate to achieve multi-degree-of-freedom angle adjustment.

2. The multi-angle adjustable mounting base for an electric vibration test bench according to claim 1, characterized in that: The ball-and-bowl adjustment mechanism has two layers, including a first-layer ball-and-bowl adjustment mechanism and a second-layer ball-and-bowl adjustment mechanism; The first-layer ball-and-bowl adjustment mechanism includes: a first bowl-shaped cavity fixed on the base, a first ball seat sitting in the first bowl-shaped cavity, and a first locking ring fitted with the first ball seat; The base plate assembly includes a second base plate fixed to the top of the first ball seat and a second base plate fixed to the second base plate. The second base plate is provided with a second bowl-shaped cavity. The second ball seat sits in the second bowl-shaped cavity and is limited by a second pressure locking ring, thus forming the second layer ball-bowl pair adjustment mechanism. The top of the second ball seat is fixedly connected to the reference mounting plate. The circumferential edge of the first bowl-shaped cavity is parallel to the first locking ring and the vibration table surface. The circumferential edge of the second bowl-shaped cavity is parallel to the second base plate and the second locking ring.

3. The multi-angle adjustable mounting base for an electric vibration test bench according to claim 2, characterized in that: Two sets of first pushers are symmetrically installed on the first locking ring to drive the first ball seat to swing around its center in a first plane perpendicular to the line connecting the two sets of first pushers; two sets of second pushers are symmetrically installed on the second locking ring to drive the second ball seat to swing around its center in a second plane perpendicular to the line connecting the two sets of second pushers; the first plane and the second plane are perpendicular to each other.

4. The multi-angle adjustable mounting base for an electric vibration test bench according to claim 3, characterized in that: The top ends of the first pusher and the second pusher are respectively fixed with a first push ball and a second push ball; the bottom side of the second base plate and the bottom side of the reference mounting plate are provided with linear guide grooves for accommodating and guiding the first push ball and the second push ball.

5. A multi-angle adjustable mounting base for an electric vibration test bench according to any one of claims 1-4, characterized in that: The jacking component is an electric push rod, a servo electric cylinder, or a hydraulic cylinder, and is connected to a control unit. The control unit is used to control the independent and precise displacement of each jacking component.

6. A multi-angle adjustable mounting base for an electric vibration test bench according to any one of claims 1-4, characterized in that: The locking ring is pressed against the circumferential edge of the bowl-shaped cavity by a right-angle ring member, and the locking fastener passes through the right-angle ring member and the edge of the bowl-shaped cavity in sequence and is locked to the corresponding base.

7. The multi-angle adjustable mounting base for an electric vibration test bench according to claim 1, characterized in that: The reference mounting plate is a multi-functional interface plate with a standardized mounting hole array or a quick clamping mechanism.

8. The multi-angle adjustable mounting base for an electric vibration test bench according to claim 1, characterized in that: The locking device includes a T-shaped pressure bar and a locking bolt; the T-shaped pressure bar passes vertically through the right-angle ring and the circumferential edge of the bowl-shaped cavity in sequence, and is inserted into a preset mounting hole in the base; a positioning hole is opened on the end of the T-shaped pressure bar; the locking bolt is threaded to the side wall of the base in the horizontal direction, and its end can be screwed into and through the positioning hole to lock the T-shaped pressure bar in the radial direction, thereby pressing the right-angle ring and the circumferential edge of the bowl-shaped cavity onto the base.

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