Rubber node three-degree-of-freedom composite fatigue detection device

Abstract

This utility model discloses a three-degree-of-freedom composite fatigue testing device for rubber nodes, belonging to the technical field of fatigue testing devices. This three-degree-of-freedom composite fatigue testing device for rubber nodes includes a first testing mechanism and a second testing mechanism. The first testing mechanism includes a pair of guide rail supports and a clamping block. A rubber node is fitted inside the clamping block. Guide rails are fixedly installed on the opposing surfaces of the pair of guide rail supports, and sliders are slidably installed on the guide rails. Transition components are fixedly installed on the opposing surfaces of the pair of sliders. Deflection shafts are bolted to both ends of the clamping block. A U-shaped frame is rotatably fitted between the pair of deflection shafts. The pair of deflection shafts are rotatably connected to the central holes of the pair of transition components. A first roller is bolted to the bottom end of the clamping block. The second testing mechanism includes a pair of torsion supports, with a torsion shaft rotatably connected to the center of each pair of torsion supports. This utility model improves the comprehensiveness and accuracy of the rubber node fatigue testing device.

Description

Technical Field

[0001] This utility model relates to the technical field of fatigue detection devices, specifically a three-degree-of-freedom composite fatigue detection device for rubber nodes. Background Technology

[0002] Rubber joints generally consist of two main parts: a housing and a mandrel. The housing is tubular, and the mandrel is cylindrical with mounting holes at both ends. The centerlines of the mounting holes are parallel to each other and perpendicular to the mandrel axis. Rubber is filled between the housing and the mandrel. The mandrel can move radially, axially, torsionally, and deflectively relative to the housing. Rubber joints are important connecting components in rail vehicles and are widely used in urban rail vehicles such as subways and light rails, as well as high-speed trains. The main advantages of rubber joints are their adjustable angle and bending capacity, high load-bearing capacity, and durability. They can maintain a stable connection under high-intensity working environments, ensuring the normal operation of all connecting components. Rubber joints bear important functions such as transmitting longitudinal forces for traction and braking, ensuring stable train operation, and providing good guidance. During operation, they are subjected to alternating loads such as axial force, radial force, torsional force, and deflection force, requiring extremely high reliability.

[0003] Based on the above, the inventors have identified the following problems: Most existing rubber joint fatigue testing devices on the market can only apply and monitor loads in a single direction, such as simple axial tension or radial compression tests. However, in actual engineering applications, the working environment of rubber joints is extremely complex, and existing single-direction testing devices cannot simulate such real-world conditions, leading to significant differences between the test results and actual service performance. Therefore, in view of this, the inventors have researched and improved upon existing structures and shortcomings, providing a three-degree-of-freedom composite fatigue testing device for rubber joints, aiming to achieve greater practical value. Utility Model Content

[0004] The purpose of this invention is to provide a three-degree-of-freedom composite fatigue testing device for rubber joints, in order to solve the problem mentioned in the background art that most of the current rubber joint fatigue testing devices on the market can only achieve load application and monitoring in a single direction.

[0005] In view of the above problems, the technical solution proposed by this utility model is as follows:

[0006] A three-degree-of-freedom composite fatigue testing device for rubber nodes includes a first testing mechanism and a second testing mechanism. The first testing mechanism includes a pair of guide rail supports and a clamping block. A rubber node is fitted inside the clamping block. Guide rails are fixedly installed on the opposing surfaces of the pair of guide rail supports. Slider blocks are slidably installed on the guide rails. Transition members are fixedly installed on the opposing surfaces of the pair of sliders. Deflection shafts are bolted to both ends of the clamping block. A U-shaped frame is rotatably fitted between the pair of deflection shafts. The pair of deflection shafts are rotatably connected to the center holes of the pair of transition members. A first roller is bolted to the bottom end of the clamping block. The second testing mechanism includes a pair of torsion supports. A torsion shaft is rotatably connected to the center of the pair of torsion supports. Irregular holes are opened on the opposing surfaces of the pair of torsion shafts. The two ends of the rubber node are inserted into the pair of irregular holes.

[0007] Furthermore, it also includes a support mechanism, which includes a base, the bottom ends of a pair of guide rail brackets are respectively connected to both ends of the upper surface of the base by bolts, and the bottom ends of a pair of torsion brackets are respectively connected to both sides of the upper surface of the base by bolts.

[0008] The beneficial effect of adopting the above-mentioned further solution is that the base of the support mechanism provides a stable installation foundation for the first and second testing mechanisms. By connecting the guide rail bracket and the torsion bracket with bolts, the entire testing device structure is guaranteed to be stable and will not be displaced or shaken due to external forces during the testing process, thus ensuring the accuracy and reliability of the testing results.

[0009] Furthermore, a first slide rail seat is fixedly installed on the upper surface of the base, and a first slide rail is slidably installed inside the first slide rail seat.

[0010] The beneficial effect of adopting the above-mentioned further solution is that, with the first slide rail seat and the first slide rail set, when the first slide rail slides, the first roller is driven to roll inside the first roller groove by the first roller groove, thereby causing the clamping block to swing and enabling the rubber node to achieve a degree of freedom of movement.

[0011] Furthermore, a first roller groove is formed on the upper end surface of the first slide rail, and the first roller groove is tactilely connected to the first roller.

[0012] The beneficial effect of adopting the above-mentioned further solution is that the first roller groove and the first roller are connected in a rolling manner, and the two cooperate with each other, so that the clamping block can be deflected, thereby realizing the movement of one degree of freedom of the rubber node.

[0013] Furthermore, a second slide rail seat is fixedly installed on the upper end of each of the torsion brackets, and a second slide rail is slidably installed inside the second slide rail seat. A second roller groove is opened on each of the second slide rails, and a connector is installed between one end of a pair of second slide rails by bolts.

[0014] The beneficial effect of adopting the above-mentioned further solution is that the second slide rail seat, the second slide rail, and the second roller groove provide a rolling track for the second roller. Simultaneously, the connecting piece connects the pair of second slide rails, enhancing the stability of the structure and allowing the second slide rails to move synchronously, ensuring the stability and accuracy of the torsional motion of the rubber node. Furthermore, connecting rods are fixedly installed on the outer side of each torsion shaft, and second rollers are installed on one side of the upper end of each connecting rod, with the second rollers rollingly connected to the second roller grooves.

[0015] The beneficial effect of adopting the above-mentioned further solution is that the rolling connection between the connecting rod and the second roller and the second roller groove allows the second roller to move when the second slide rail moves, thereby driving the second roller to move through the second roller groove, and then driving the torsion shaft to swing slightly through the connecting rod to achieve a degree of freedom of movement.

[0016] Furthermore, both ends of the opposing surfaces of the torsion shaft are threaded with locking bolts, and the opposing ends of each pair of locking bolts abut against the outer sides of both ends of the rubber node.

[0017] The beneficial effect of adopting the above-mentioned further solution is that the locking bolt is threadedly connected to the torsion shaft. By tightening the locking bolt, the rubber node can be firmly fixed in the irregular hole of the torsion shaft, preventing the rubber node from loosening or falling off during the test. This ensures that the rubber node can accurately simulate the actual working conditions during the torsion motion and guarantees that the test results truly reflect the fatigue performance of the rubber node.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows: In this three-degree-of-freedom composite fatigue testing device for rubber nodes, the first testing mechanism, through the cooperation of the guide rail bracket, guide rail, and slider, allows the transition piece to slide along the guide rail, driving the clamping block and the rubber node to move vertically, simulating one degree of freedom motion of the rubber node; the rotational connection between the deflection shaft and the U-shaped frame and the transition piece ensures that the clamping block, while moving up and down with the U-shaped frame, does not affect the oscillation of the rubber node within a certain angle range; the first roller is rolled in connection with the first roller groove, and when the first slide rail moves, it can drive the rubber node... The node swings, achieving another degree of freedom. The torsion shaft of the second testing mechanism is connected to the rubber node through a special-shaped hole, which can drive the rubber node to torsion, achieving a third degree of freedom. This allows for three-degree-of-freedom composite fatigue testing of the rubber node. The locking bolt is threaded to the torsion shaft. By tightening the locking bolt, the rubber node can be firmly fixed in the special-shaped hole of the torsion shaft, preventing the rubber node from loosening or falling off during the testing process. This ensures that the rubber node can accurately simulate the actual working conditions during torsion, and guarantees that the test results truly reflect the fatigue performance of the rubber node. Attached Figure Description

[0019] Figure 1This is a three-dimensional structural schematic diagram of the rubber joint three-degree-of-freedom composite fatigue detection device disclosed in an embodiment of this utility model;

[0020] Figure 2 This is a schematic diagram of the unfolded three-dimensional structure of the three-degree-of-freedom composite fatigue testing device for rubber nodes disclosed in this embodiment of the present invention. Figure 1 ;

[0021] Figure 3 This is a schematic diagram of the unfolded three-dimensional structure of the three-degree-of-freedom composite fatigue testing device for rubber nodes disclosed in this embodiment of the present invention. Figure 2 ;

[0022] Figure 4 This is a three-dimensional structural diagram of the torsion bracket of the three-degree-of-freedom composite fatigue testing device for rubber nodes disclosed in this utility model embodiment;

[0023] Figure 5 This is a partial three-dimensional structural diagram of the clamping block and guide rail support of the rubber node three-degree-of-freedom composite fatigue testing device disclosed in this utility model embodiment.

[0024] In the diagram: 1. Support mechanism; 101. Base; 102. First slide rail seat; 103. First slide rail; 104. First roller groove; 2. First detection mechanism; 201. Guide rail bracket; 202. Guide rail; 203. Slider; 204. Transition piece; 205. Clamping block; 206. Deflection shaft; 207. First roller; 208. U-shaped frame; 3. Second detection mechanism; 301. Torsion bracket; 302. Torsion shaft; 303. Second slide rail seat; 304. Second slide rail; 305. Second roller groove; 306. Connector; 307. Connecting rod; 308. Second roller; 309. Irregular hole; 310. Locking bolt; 4. Rubber node. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-5This utility model provides a technical solution: a three-degree-of-freedom composite fatigue testing device for rubber nodes, comprising a first testing mechanism 2 and a second testing mechanism 3. The first testing mechanism 2 includes a pair of guide rail supports 201 and a clamping block 205. A rubber node 4 is fitted inside the clamping block 205. Guide rails 202 are fixedly installed on the opposing surfaces of the pair of guide rail supports 201. Slider blocks 203 are slidably installed on the guide rails 202. Transition pieces 204 are fixedly installed on the opposing surfaces of the pair of sliders 203. Deflection shafts 206 are bolted to both ends of the clamping block 205. A U-shaped frame 208 is rotatably sleeved between the pair of deflection shafts 206. The pair of deflection shafts 206 are rotatably connected to the center holes of the pair of transition pieces 204 respectively. A first roller 207 is bolted to the bottom end of the clamping block 205. The second testing mechanism 3 includes a pair of torsion supports 301. A torsion shaft 302 is rotatably connected to the center of the pair of torsion supports 301. Irregularly shaped openings are formed on the opposing surfaces of the pair of torsion shafts 302. Holes 309 are inserted into the rubber node 4 at both ends. The first detection mechanism 2, through the cooperation of the guide rail bracket 201, guide rail 202 and slider 203, allows the transition piece 204 to slide along the guide rail 202, driving the clamping block 205 and the rubber node 4 to move in the vertical direction, simulating one degree of freedom of the rubber node 4. The deflection shaft 206 is rotatedly connected to the U-shaped frame 208 and the transition piece 204, so that the clamping block 205 does not affect the swing of the rubber node 4 within a certain angle range when it moves up and down with the U-shaped frame 208. The first roller 207 is rolledly connected to the first roller groove 104. When the first slide rail 103 moves, it can drive the rubber node 4 to swing, realizing another degree of freedom of movement. The torsion shaft 302 of the second detection mechanism 3 is inserted into the rubber node 4 through the irregular hole 309, which can drive the rubber node 4 to torsion, realizing the third degree of freedom of movement, thereby performing three-degree-of-freedom composite fatigue detection on the rubber node 4.

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figures 1-5It also includes a support mechanism 1, which includes a base 101. The bottom ends of a pair of guide rail brackets 201 are respectively connected to the two ends of the upper end face of the base 101 by bolts. The bottom ends of a pair of torsion brackets 301 are respectively connected to the two sides of the upper end face of the base 101 by bolts. A first slide rail seat 102 is fixedly installed on the upper end face of the base 101. A first slide rail 103 is slidably installed inside the first slide rail seat 102. A first roller groove 104 is formed on the upper end face of the first slide rail 103. The first roller groove 104 and the first... The roller 207 is rolled and connected. The first slide rail seat 102 and the first slide rail 103 are set up so that when the first slide rail 103 slides, the first roller 207 is driven to roll inside the first roller groove 104 by the first roller groove 104, which causes the clamping block 205 to swing, so that the rubber node 4 can achieve a degree of freedom of movement. The first roller groove 104 and the first roller 207 are rolled and connected. The two cooperate with each other so that the clamping block 205 can deflect, thereby achieving a degree of freedom of movement of the rubber node 4.

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figures 1-5A pair of torsion brackets 301 are each fixedly mounted with a second slide rail seat 303. A second slide rail 304 is slidably mounted inside the second slide rail seat 303. Each second slide rail 304 has a second roller groove 305. A connector 306 is bolted between one end of each pair of second slide rails 304. A connecting rod 307 is fixedly mounted on the outer side of each pair of torsion shafts 302. A second roller 308 is mounted on one side of the upper end of each connecting rod 307. The second roller 308 is tumblingly connected to the second roller groove 305. Locking bolts 310 are threaded onto both ends of the opposing surfaces of each pair of torsion shafts 302. The opposing ends of each pair of locking bolts 310 abut against the outer ends of both ends of the rubber node 4. The second slide rail seat 303, the second slide rail 304, and the second roller groove 305 provide a rolling track for the second roller 308. Simultaneously, the connector 306 connects the pair of second slide rails 302... The two slide rails 304 are connected, enhancing the stability of the structure and allowing the second slide rail 304 to move synchronously, ensuring the stability and accuracy of the torsional motion of the rubber node 4. The connecting rod 307 and the rolling connection between the second roller 308 and the second roller groove 305 allow the second roller 308 to move when the second slide rail 304 moves, which in turn drives the torsion shaft 302 to swing slightly through the connecting rod 307, achieving one degree of freedom of movement. The locking bolt 310 is threadedly connected to the torsion shaft 302. By tightening the locking bolt 310, the rubber node 4 can be firmly fixed in the irregular hole 309 of the torsion shaft 302, preventing the rubber node 4 from loosening or falling off during the test, ensuring that the rubber node 4 can accurately simulate the actual working conditions during the torsional motion, and ensuring that the test results truly reflect the fatigue performance of the rubber node 4.

[0031] Specifically, the working principle of this three-degree-of-freedom composite fatigue testing device for rubber nodes is as follows: First, the rubber node 4 is fitted onto the center of the clamping block 205 and fixed with bolts. Then, both ends are inserted into the irregular holes 309 of the torsion shaft 302 and fixed with locking bolts 310. In the first testing mechanism 2, when the U-shaped frame 208 is pressed down, the slider 203 slides along the guide rail 202, causing the transition piece 204 and the clamping block 205 to move vertically, simulating one degree of freedom of movement of the rubber node 4. Simultaneously, the first slide rail 103 slides within the first slide rail seat 102, passing through the first roller 207 and the first roller... The engagement of the groove 104 causes the deflection shafts 206 installed at both ends of the clamping block 205 to swing inside the central hole of the transition piece 204, simulating the angular motion of the second degree of freedom. In the second detection mechanism 3, the second slide rail 304 slides within the second slide rail seat 303. Through the transmission between the second roller 308 and the second roller groove 305, the connecting rod 307 and the torsion shaft 302 are driven to swing slightly, causing the rubber node 4 to generate torsional motion, realizing the third degree of freedom motion. The three sets of motion work together to perform a three-degree-of-freedom composite fatigue test on the rubber node 4. The base 101 and each slide rail structure ensure smooth and accurate motion, guaranteeing the reliability of the test results.

[0032] It should be noted that all standard parts used in this application can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. The control method is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art and is common knowledge in the field. Furthermore, since this application is mainly used to protect mechanical devices, this application will not explain the control method and circuit connection in detail.

Claims

1. A three-degree-of-freedom composite fatigue testing device for rubber joints, characterized in that, The system includes a first testing mechanism (2) and a second testing mechanism (3). The first testing mechanism (2) includes a pair of guide rail brackets (201) and a clamping block (205). The clamping block (205) has a rubber node (4) fitted inside. Guide rails (202) are fixedly installed on the opposing surfaces of the pair of guide rail brackets (201). Slider blocks (203) are slidably installed on the guide rails (202). Transition pieces (204) are fixedly installed on the opposing surfaces of the pair of sliders (203). Deflection shafts (206) are bolted to both ends of the clamping block (205). A U-shaped frame (208) is rotatably sleeved between (206), and a pair of deflection shafts (206) are rotatably connected to the center holes of a pair of transition pieces (204). The bottom end of the clamping block (205) is bolted with a first roller (207). The second detection mechanism (3) includes a pair of torsion brackets (301), and a torsion shaft (302) is rotatably connected to the center of each pair of torsion brackets (301). A shaped hole (309) is opened on the facing surfaces of the pair of torsion shafts (302). The two ends of the rubber node (4) are respectively inserted into the pair of shaped holes (309).

2. The three-degree-of-freedom composite fatigue testing device for rubber joints according to claim 1, characterized in that, It also includes a support mechanism (1), which includes a base (101), the bottom ends of a pair of guide rail brackets (201) are respectively connected to the two ends of the upper surface of the base (101) by bolts, and the bottom ends of a pair of torsion brackets (301) are respectively connected to the two sides of the upper surface of the base (101) by bolts.

3. The three-degree-of-freedom composite fatigue testing device for rubber joints according to claim 2, characterized in that, The upper surface of the base (101) is fixedly installed with a first slide rail seat (102), and a first slide rail (103) is slidably installed inside the first slide rail seat (102).

4. The three-degree-of-freedom composite fatigue testing device for rubber joints according to claim 3, characterized in that, The upper end face of the first slide rail (103) is provided with a first roller groove (104), and the first roller groove (104) is tactilely connected to the first roller (207).

5. The three-degree-of-freedom composite fatigue testing device for rubber joints according to claim 1, characterized in that, A second slide rail seat (303) is fixedly installed on the upper end of each pair of torsion brackets (301). A second slide rail (304) is slidably installed inside the second slide rail seat (303). A second roller groove (305) is opened on each of the second slide rails (304). A connector (306) is installed between one end of each pair of second slide rails (304) by bolts.

6. The three-degree-of-freedom composite fatigue testing device for rubber joints according to claim 5, characterized in that, A connecting rod (307) is fixedly installed on the outer side of each pair of torsion shafts (302). A second roller (308) is installed on one side of the upper end of each connecting rod (307). The second roller (308) is in rolling connection with the second roller groove (305).

7. The three-degree-of-freedom composite fatigue testing device for rubber joints according to claim 6, characterized in that, Both ends of the opposing surfaces of the pair of torsion shafts (302) are threaded with locking bolts (310), and the opposing ends of each pair of locking bolts (310) abut against the outer sides of the two ends of the rubber node (4).

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