Turntable loading device
By designing a rotary table loading device including a mounting frame, boom root loader, boom cylinder loader and stress tester, the problem of difficulty in detecting the stress of the rotary table headplate in the prior art is solved, and accurate simulation and real-time monitoring of the rotary table load condition are achieved, and testing efficiency and safety are improved.
Patent Information
- Application Number
- CN202411908859.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-24
- Publication Date
- 2025-03-21
AI Technical Summary
The prior art is difficult to effectively detect the stress conditions at the turntable head plate, which leads to the inability to predict the loads that the turntable can bear in advance, affecting the normal operation of the excavator and the safety of the operator.
A rotary table loading device is designed, including a mounting frame, boom root loader, boom cylinder loader and stress test piece. The rail axis slides along the sliding groove to simulate the load under different stress values and angles, providing two loading methods: positive load and bias load, and real-time monitoring of the stress at the ear plate.
It can accurately simulate the load condition of the turntable under different working conditions without the need for excavator molding, monitor the stress condition at the ear plate in real time, and provide load adaptation under multiple working conditions, improving the load test efficiency and accuracy of the turntable.
Smart Images
Figure CN119666422A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of excavator testing, and in particular relates to a turntable loading device. Background Art
[0002] The turntable is an important bearing part of the excavator. Figure 2 As shown in the figure, the lugs at the boom root pin 51 and the boom cylinder root pin 52 at the front end of the turntable body are important bearing parts for connecting the turntable and the working device. Once the lugs are cracked, it will seriously affect the normal operation of the excavator and even threaten the personal safety of the operator. Therefore, it is very important to detect the stress that the lugs can withstand in order to predict the load that the turntable can withstand in advance. Summary of the invention
[0003] In view of the above problems existing in the prior art, the present invention provides a turntable loading device, which can fully simulate actual working conditions and facilitate testing of the load that the turntable can withstand in various situations.
[0004] To achieve the above object, the technical solution provided by the present invention is as follows:
[0005] In the first aspect, the present application provides a turntable loading device, including a mounting frame, a boom root loader, and a boom cylinder loader. The mounting frame is provided with a sliding groove, in which a rail shaft is slidingly connected; one end of the boom root loader is rotatably connected to the rail shaft, and the other end is rotatably connected to the boom root pin of the turntable; one end of the boom cylinder loader is rotatably connected to the rail shaft, and the other end is rotatably connected to the boom cylinder root pin of the turntable. A stress test piece is provided on the turntable, and the stress test piece is used to detect the force on the turntable at the connection between the boom root pin and the boom cylinder root pin and the turntable.
[0006] Optionally, the sliding groove is arranged on both sides of the mounting frame, the boom root loader is vertically set between the boom root pin and the rail axis, and the distance from the sliding groove to the straight line where the boom root pin is located is equal to the vertical distance between the boom root pin and the rail axis.
[0007] Optionally, an eccentric load loader is also included. The eccentric load loader is arranged on a mounting frame, and the eccentric load loader is connected to a pin shaft at the root of the boom.
[0008] Optionally, the boom cylinder loaders are provided in two groups, and the two groups of boom cylinder loaders are symmetrically arranged on both sides of the boom root loader, and the two groups of boom cylinder loaders are respectively arranged corresponding to the two boom cylinder root pins on the turntable.
[0009] Optionally, a limited telescopic member is rotatably connected to the mounting frame, and the limited telescopic member is rotatably connected to the rail shaft.
[0010] Optionally, the boom root pin is connected to the main vertical plate of the turntable through a first ear plate, the boom cylinder root pin is connected to the turntable through a second ear plate, and the first ear plate and the second ear plate are both welded to the main vertical plate of the turntable; the stress test piece includes a first stress test piece and a second stress test piece, the first stress test piece is arranged at the weld connection between the first ear plate and the main vertical plate of the turntable, and the second stress test piece is arranged at the weld connection between the second ear plate and the main vertical plate of the turntable.
[0011] Optionally, the stress testing piece includes a strain gauge.
[0012] Optionally, a controller is further included, wherein a signal output end of the controller is connected to the boom root loader and the boom cylinder loader, and a signal input end of the controller is connected to the stress test piece.
[0013] Optionally, the rail shaft is slidingly connected to the sliding groove via a bearing.
[0014] Optionally, a liftable connecting seat is provided on the mounting frame, and the eccentric loader is arranged on the connecting seat through the mounting seat, and the mounting seat and the connecting seat are slidably connected.
[0015] Compared with the prior art, this application has at least the following beneficial effects:
[0016] In the present invention, the boom root loader is rotatably connected to the boom root pin of the turntable, and the boom cylinder loader is rotatably connected to the boom cylinder root pin of the turntable. The slide of the rail shaft along the sliding groove can simulate the load borne by the turntable at different force values and different angles under actual working conditions; two loading modes, positive load and offset load, can be provided at the same time, and can adapt to the loading requirements of various working conditions; the test process can monitor the force condition at the ear plate in real time, and only a turntable needs to be provided, and no excavator molding is required. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0018] Figure 1 The schematic diagram of the structure of the turntable in different working postures under real conditions (1a is the posture with the shortest stroke of the boom cylinder, Figure 1 b is the longest stroke of the boom cylinder);
[0019] Figure 2 It is a schematic diagram of the turntable structure;
[0020] Figure 3This is a schematic diagram of the structure of a turntable loading device in an embodiment of the present application;
[0021] Figure 4 This is the loading posture of a turntable loading device in an embodiment of the present application when the load reaches the longest stroke of the boom cylinder loader;
[0022] Figure 5 This is an eccentric loading posture of a turntable loading device in an embodiment of the present application;
[0023] Description of reference numerals:
[0024] 1. Mounting frame; 11. Sliding groove; 12. Rail shaft; 121. Limiting telescopic member; 13. Connecting seat; 2. Boom root loader; 3. Boom cylinder loader; 4. Eccentric load loader; 41. Mounting seat; 5. Turntable; 51. Boom root pin; 511. First ear plate; 52. Boom cylinder root pin; 521. Second ear plate; 53. Boom cylinder; 6. Mounting plate; 61. Metro plate. DETAILED DESCRIPTION
[0025] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use.
[0026] Example 1
[0027] like Figure 3 As shown, a turntable loading device includes a mounting frame 1, a boom root loader 2, and a boom cylinder loader 3. A sliding groove 11 is opened on the mounting frame 1, and a rail shaft 12 is slidingly connected in the sliding groove 11; one end of the boom root loader 2 is rotatably connected to the rail shaft 12, and the other end is rotatably connected to the boom root pin 51 of the turntable 5; one end of the boom cylinder loader 3 is rotatably connected to the rail shaft 12, and the other end is rotatably connected to the boom cylinder root pin 52 of the turntable 5. A stress test piece is arranged on the turntable 5, and the stress test piece is used to detect the stress conditions at the connection between the boom root pin 51 and the boom cylinder root pin 52 and the turntable 5.
[0028] By sliding the rail shaft 12 along the sliding groove 11 to different positions, the actual working conditions of the turntable 5 at different force values and different angles can be simulated, so that the stress test piece can monitor the forces under different conditions in real time, and can meet the load capacity test of the turntable 5 under various loading conditions.
[0029] Example 2
[0030] The difference between this embodiment and the embodiment 1 is that the sliding groove 11 is arranged on both sides of the mounting frame 1, the boom root loader 2 is vertically arranged between the boom root pin 51 and the rail shaft 12, and the distance from the sliding groove 11 to the straight line where the boom root pin 51 is located is equal to the vertical distance between the boom root pin 51 and the rail shaft 12, so that during the loading process of the turntable 5, the boom root loader 2 takes the boom root pin 51 as the center and drives the rail shaft 12 to rotate around the sliding groove 11 with a fixed length as the radius. During the process, the boom cylinder loader 3 is extended from the shortest posture to the longest posture, thereby truly and accurately simulating the turntable 5 when the boom cylinder stroke is the shortest (see Figure 3 ) to the longest (see Figure 4 ) Load analysis under posture ( Figure 1 For different working postures of the turntable in real situations, Figure 1 a is the shortest posture of the boom cylinder. Figure 1 b is the longest posture of the boom cylinder). In this embodiment, both the boom cylinder loader 3 and the boom root loader 2 can be hydraulic cylinders.
[0031] The turntable 5 is fixed on the base plate 61 through the mounting plate 6 , so that the turntable 5 can be fixed conveniently.
[0032] There are two groups of boom cylinder loaders 3, which are symmetrically arranged on both sides of the boom root loader 2. The two groups of boom cylinder loaders 3 are respectively arranged corresponding to the two boom cylinder root pins 52 on the turntable 5, so that the loading process is more stable and the force is uniform, which can better simulate the actual working conditions.
[0033] The boom root pin 51 is connected to the main vertical plate of the turntable 5 through the first ear plate 511. The boom cylinder root pin 52 is connected to the main vertical plate of the turntable 5 through the second ear plate 521. The first ear plate 511 and the second ear plate 512 are welded to the main vertical plate of the turntable 5. The stress test piece includes a first stress test piece and a second stress test piece. The first stress test piece is arranged at the weld connection between the first ear plate 511 and the main vertical plate of the turntable 5, and the second stress test piece is arranged at the weld connection between the second ear plate 521 and the main vertical plate of the turntable 5. The stress test piece includes a strain gauge.
[0034] The mounting frame 1 is rotatably connected with a limited telescopic member 121, which is arranged on both sides of the mounting frame 1. The limited telescopic members 121 on both sides are rotatably connected with the side walls of the two ends of the rail shaft 12 respectively. The limited telescopic member 121 can be a limited hydraulic cylinder. During the sliding process of the rail shaft 12 along the sliding groove 11, the limited telescopic member 121 is driven by the rail shaft 12 to stretch and shorten, and moves along the sliding groove 11 at the same time, which can avoid the rail shaft 12 from moving, and the loading process is more stable. In order to reduce the friction of the rail shaft 12 during the sliding process along the sliding groove 11, the rail shaft 12 is slidably connected with the sliding groove 11 through a bearing to reduce the friction coefficient.
[0035] It also includes a controller, a signal output end of the controller is connected to the boom root loader 2 and the boom cylinder loader 3, and a signal input end of the controller is connected to the first stress test piece and the second stress test piece.
[0036] The controller controls the boom root loader 2 and the boom cylinder loader 3. Under the action of the controller, the boom cylinder loader 3 rotates at a certain angular velocity, sets the thrust value of the boom cylinder loader 3 on the boom cylinder root pin 52, and sets the force value applied by the boom root hydraulic cylinder to the boom root pin 51. During the process, the first stress test piece and the second stress test piece can monitor the stress conditions at the first ear plate 511 and the second ear plate 521 on the turntable 5 in real time, and transmit the stress conditions to the controller, so as to obtain the stress conditions of the turntable 5 under different loading forces and different angles.
[0037] Also included is an offset loader 4, such as Figure 5 A lifting connection seat 13 is connected to the bottom surface of the top wall of the mounting frame 1. The connection seat 13 and the top wall of the mounting frame 1 can be connected by a telescopic cylinder. The eccentric load loader 4 is hinged on the connection seat 13 through the mounting seat 41. The end of the eccentric load loader 4 away from the connection seat 13 is connected to the boom root pin 51. When the eccentric load test is not required, the eccentric load loader 4 can be fixed to the connection seat 13 by a fixing pin. When the eccentric load test is required, the eccentric load loader 4 is connected to the boom root pin 51 to test the torsional resistance of the boom root pin 51.
[0038] In order to perform eccentric load test on different positions of the boom root pin 51, the mounting seat 41 is slidably connected to the connecting seat 13. During loading, the loading position and loading angle can be adjusted by lifting the connecting seat 13 and sliding the mounting seat 41 along the connecting seat 13.
[0039] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood by specific circumstances.
[0040] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.
Claims
1. A turntable loading device, characterized in that: It includes a mounting frame, a boom root loader, and a boom cylinder loader. The mounting frame is provided with a sliding groove, in which a rail shaft is slidingly connected; one end of the boom root loader is rotatably connected to the rail shaft, and the other end is rotatably connected to the boom root pin of the turntable; one end of the boom cylinder loader is rotatably connected to the rail shaft, and the other end is rotatably connected to the boom cylinder root pin of the turntable. A stress test piece is arranged on the turntable, and the stress test piece is used to detect the force on the turntable at the connection between the boom root pin and the boom cylinder root pin and the turntable.
2. The turntable loading device according to claim 1, characterized in that: The sliding groove is arranged on both sides of the mounting frame, and the boom root loader is vertically arranged between the boom root pin and the rail axis. The distance from the sliding groove to the straight line where the boom root pin is located is equal to the vertical distance between the boom root pin and the rail axis.
3. The turntable loading device according to claim 1, characterized in that: It also includes an eccentric load loader, wherein the eccentric load loader is arranged on a mounting frame, and the eccentric load loader is connected to a pin shaft at the root of the boom.
4. The turntable loading device according to claim 1, characterized in that: The boom cylinder loaders are provided in two groups, and the two groups of boom cylinder loaders are symmetrically arranged on both sides of the boom root loader, and the two groups of boom cylinder loaders are respectively arranged corresponding to the two boom cylinder root pins on the turntable.
5. The turntable loading device according to claim 1, characterized in that: The mounting frame is rotatably connected with a limited telescopic member, and the limited telescopic member is rotatably connected with the rail shaft.
6. The turntable loading device according to claim 1, characterized in that: The root pin of the boom is connected to the main vertical plate of the turntable through the first ear plate, and the root pin of the boom cylinder is connected to the turntable through the second ear plate, and the first ear plate and the second ear plate are both welded to the main vertical plate of the turntable; the stress test piece includes a first stress test piece and a second stress test piece, the first stress test piece is arranged at the weld connection between the first ear plate and the main vertical plate of the turntable, and the second stress test piece is arranged at the weld connection between the second ear plate and the main vertical plate of the turntable.
7. The turntable loading device according to claim 1, characterized in that: The stress testing piece includes a strain gauge.
8. The turntable loading device according to claim 1, characterized in that: It also includes a controller, a signal output end of the controller is connected to the boom root loader and the boom cylinder loader, and a signal input end of the controller is connected to the stress test piece.
9. The turntable loading device according to claim 1, characterized in that: The rail shaft is slidingly connected with the sliding groove through a bearing.
10. The turntable loading device according to claim 3, characterized in that: The mounting frame is provided with a liftable connecting seat, the eccentric load loader is arranged on the connecting seat through the mounting seat, and the mounting seat is slidably connected with the connecting seat.