Electric cylinder loading test bench
By designing an electric cylinder loading test bench, the testing system was simplified, automated testing of electric cylinders was achieved, the problems of high testing complexity and cost in existing technologies were solved, and testing efficiency and data accuracy were improved.
Patent Information
- Application Number
- CN202423180016.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2034-12-23
AI Technical Summary
Existing electric cylinder testing systems are complex in composition, have high production and development costs, are difficult to operate, and produce unsatisfactory results.
An electric cylinder loading test bench was designed, including a frame, an electric cylinder under test, a loading cylinder, and a linear guide rail. By combining a hydraulic system and sensors, the structure was optimized through simulation to achieve automated testing.
The testing system has been simplified, production costs have been reduced, testing efficiency and data accuracy have been improved, and all test conditions and methods for electric cylinders have been met.
Smart Images
Figure CN223827785U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to electric cylinder test technical field especially electric cylinder loading test bench. BACKGROUND
[0002] With the rapid development of science and technology, intelligentization and motorization have become an important development trend of engineering machinery industry, and electric cylinder has been widely applied in engineering machinery field. Compared with oil cylinder, the main advantages of electric cylinder are high transmission efficiency, high positioning accuracy, fast response speed, strong stability, energy saving and environmental protection. The working principle of electric cylinder is to convert the rotating output of servo motor into linear reciprocating motion of ball screw through speed reducer and drive external load to do linear motion. Electric cylinder test is an important link to ensure the performance and safety of electric cylinder. The test content includes static indicators such as load capacity and position accuracy, and dynamic indicators such as stroke of electric cylinder. The existing electric cylinder test system is relatively complex, and the production and development cost is relatively high. The test is generally completed manually or semi-automatically by engineers, which leads to difficult operation of test work, waste of a lot of time and energy, and unsatisfactory test results. SUMMARY
[0003] The utility model solves the technical problems that: in order to solve the problems existing in the prior art in the above background art, provide a kind of electric cylinder loading test bench.
[0004] The utility model solves the technical problems and adopts the technical scheme that: a kind of electric cylinder loading test bench, the test bench includes rack and be installed on rack test electric cylinder, loading oil cylinder and linear guide rail, the test electric cylinder and loading oil cylinder are respectively installed at the both ends of rack, and the output end of loading oil cylinder is connected with the piston rod end of test electric cylinder by connecting piece, and the connecting place of the both is equipped with force sensor, the connecting piece is set on linear guide rail, displacement sensor is installed in the rodless cavity of loading oil cylinder, and loading oil cylinder is connected hydraulic system, the hydraulic system includes hydraulic oil tank, main circuit, pilot circuit and oil supplement circuit, loading overflow valve group is equipped on the pilot circuit.
[0005] Further, main motor pump group, main filter, three-position four-way electromagnetic reversing valve I, first hydraulic lock and second hydraulic lock are equipped on the main circuit, three-position four-way electromagnetic reversing valve II is arranged between the main filter and three-position four-way electromagnetic reversing valve I, and the three-position four-way electromagnetic reversing valve II is connected with loading overflow valve group.
[0006] More further, pilot motor pump group, pilot filter, first electromagnetic reversing valve and second electromagnetic reversing valve are equipped on the pilot circuit, the first electromagnetic reversing valve is electrically connected with first hydraulic lock, and the second electromagnetic reversing valve is electrically connected with second hydraulic lock.
[0007] Further, a third electromagnetic reversing valve is connected between the first hydraulic lock and the second hydraulic lock.
[0008] Further, the loading overflow valve group comprises a first loading overflow valve and a second loading overflow valve, the first loading overflow valve being communicated with the working cavity A of the three-position four-way electromagnetic reversing valve II, and the second loading overflow valve being communicated with the working cavity B of the three-position four-way electromagnetic reversing valve II.
[0009] Further, an oil supplementing motor pump group and an oil supplementing filter are arranged on the oil supplementing circuit.
[0010] Further, the oil return pipe and a heat exchanger are further included, a back pressure valve is arranged on the pipeline between the heat exchanger and the hydraulic oil tank, the back pressure valve is connected with the heat exchanger through the oil return pipe, the oil return pipe is connected with a first one-way valve and a second one-way valve, the other end of the first one-way valve is connected on the pipeline between the first hydraulic lock and the rodless cavity of the loading cylinder, and the other end of the second one-way valve is connected on the pipeline between the second hydraulic lock and the rod cavity of the loading cylinder.
[0011] Further, the hydraulic oil tank is provided with a liquid level sensor and an oil temperature sensor.
[0012] Further, the top surface of the rack is provided with a cover plate, the cover plate is uniformly provided with key grooves, the test electric cylinder is connected to the first mounting ear plate, the bottom of the first mounting ear plate is provided with a flat key matched with the key groove, the loading cylinder is connected to the second mounting ear plate, and the bottom of the second mounting ear plate is provided with a flat key matched with the key groove.
[0013] Further, the linear guide rail is provided with a slider moving back and forth along the linear guide rail, and the slider is connected with the connecting piece.
[0014] The electric cylinder loading test bench has the advantages that: the hydraulic system is reasonably built by using the hydraulic cylinder loading, various test conditions and test methods can be met, the design is reasonable and the structure is simple; the test bench matched with the electric cylinder can ensure that the structural strength meets the maximum load index of the electric cylinder through simulation means under the premise of meeting the test stroke of the electric cylinder; the output of the loading force and the collection of information can be accurately controlled through the automatic control program of the software, so that the test efficiency and the accuracy of the test data are improved. BRIEF DESCRIPTION OF DRAWINGS
[0015] The utility model is further explained in connection with the drawings and embodiments.
[0016] Figure 1 It is the structure schematic diagram of electric cylinder loading test bench of the utility model.
[0017] Figure 2 It is the top view of electric cylinder loading test bench of the utility model.
[0018] Figure 3 is the principle diagram of the hydraulic system in the utility model.
[0019] In the figure: 1, rack; 2, test electric cylinder; 3, loading oil cylinder; 4, linear guide rail; 5, first mounting lug plate; 6, second mounting lug plate; 7, connecting piece; 8, force sensor; 9, displacement sensor; 10, main motor pump group; 11, cover plate; 111, key groove; 12, main filter; 13, three-position four-way electromagnetic reversing valve I; 14, first hydraulic lock; 15, second hydraulic lock; 16, pilot motor pump group; 17, pilot filter; 18, first electromagnetic reversing valve; 19, second electromagnetic reversing valve; 20, third electromagnetic reversing valve; 21, first loading overflow valve; 22, second loading overflow valve; 23, oil supplement motor pump group; 24, oil supplement filter; 25, heat exchanger; 26, back pressure valve; 27, oil return pipe; 28, first check valve; 29, second check valve; 30, liquid level sensor; 31, oil temperature sensor; 32, three-position four-way electromagnetic reversing valve II. DETAILED DESCRIPTION
[0020] The utility model will be explained further in detail in combination with the drawings. These drawings are all simplified schematic diagrams, and only illustrate the basic structure of the utility model in a schematic way, so it only shows the structure related to the utility model.
[0021] As Figure 1 and Figure 2As shown, an electric cylinder loading test bench, the test bench comprises a rack 1 and a tested electric cylinder 2, a loading oil cylinder 3 and a linear guide 4 installed on the rack 1, the top surface of the rack 1 is provided with a cover plate 11, the cover plate 11 is uniformly provided with a key groove 111, the tested electric cylinder 2 is connected to a first mounting lug plate 5, the bottom of the first mounting lug plate 5 is provided with a flat key matched with the key groove 111; the loading oil cylinder 3 is connected to a second mounting lug plate 6, the bottom of the second mounting lug plate 6 is provided with a flat key matched with the key groove 111, the tested electric cylinder 2 and the loading oil cylinder 3 are respectively installed at both ends of the rack 1, and the output end of the loading oil cylinder 3 is connected to the piston rod end of the tested electric cylinder 2 through a connecting piece 7. The connecting piece 7 is arranged on the linear guide 4, the linear guide 4 is provided with a slider moving back and forth along it, and the slider is connected with the connecting piece 7. Among them, the installation position of the loading oil cylinder 3 can be fixed, when testing and replacing electric cylinders of different specifications and sizes, the position of the tested electric cylinder 2 can be infinitely adjusted. The connecting position of the output end of the loading oil cylinder 3 and the piston rod end of the tested electric cylinder 2 is provided with a force sensor 8, and the displacement sensor 9 is arranged in the rodless cavity of the loading oil cylinder 3. The loading oil cylinder 3 is connected to a hydraulic system 100, the force sensor 8 can collect the size of the loading force of the tested electric cylinder 2 in real time, and the displacement sensor 9 can collect the motion position state of the tested electric cylinder 2 in real time. The structure of the rack 1 is simulated and analyzed by simulation software, so that the designed strength can meet the working condition of the maximum thrust or the maximum pull of the tested electric cylinder 2.
[0022] As shown in the figure, Figure 3 The hydraulic system 100 comprises a hydraulic oil tank, a main circuit, a pilot circuit and an oil supplementing circuit, the hydraulic oil tank is provided with a liquid level sensor 30 and an oil temperature sensor 31 for real-time monitoring of the state of the hydraulic oil. The main circuit is provided with a main motor pump set 10, a main filter 12, a three-position four-way electromagnetic reversing valve I 13, a first hydraulic lock 14 and a second hydraulic lock 15, a three-position four-way electromagnetic reversing valve II 32 is arranged between the main filter 12 and the three-position four-way electromagnetic reversing valve I 13, and the three-position four-way electromagnetic reversing valve II 32 is connected to a loading overflow valve set.
[0023] The pilot circuit is provided with a pilot motor pump set 16, a pilot filter 17, a first electromagnetic reversing valve 18 and a second electromagnetic reversing valve 19, the first electromagnetic reversing valve 18 is electrically connected with the first hydraulic lock 14, and the second electromagnetic reversing valve 19 is electrically connected with the second hydraulic lock 15. The first hydraulic lock 14 and the second hydraulic lock 15 are connected with a third electromagnetic reversing valve 20. The loading overflow valve set comprises a first loading overflow valve 21 and a second loading overflow valve 22, the first loading overflow valve 21 communicates with the working cavity A of the three-position four-way electromagnetic reversing valve II 32, and the second loading overflow valve 22 communicates with the working cavity B of the three-position four-way electromagnetic reversing valve II 32.
[0024] The oil supplement circuit is provided with an oil supplement motor pump set 23 and an oil supplement filter 24. The oil supplement circuit is usually automatically performed, and the oil supplement is performed by the oil supplement motor pump set 23 according to the demand of the hydraulic system 100.
[0025] The hydraulic system 100 further comprises an oil return pipe 27 and a heat exchanger 25, a back pressure valve 26 is arranged on the pipeline between the heat exchanger 25 and the hydraulic oil tank, the back pressure valve 26 is connected with the oil return pipe 27, the oil return pipe 27 is connected with a first one-way valve 28 and a second one-way valve 29, the other end of the first one-way valve 28 is connected on the pipeline between the first hydraulic lock 14 and the rodless cavity of the loading oil cylinder 3, and the other end of the second one-way valve 29 is connected on the pipeline between the second hydraulic lock 15 and the rod cavity of the loading oil cylinder 3. When the loading oil is returned, the hydraulic oil is cooled by the heat exchanger 25, and the cooled oil is returned to the low pressure side of the loading oil cylinder 3 through the first one-way valve 28 and the second one-way valve 29 under the action of the back pressure valve 26.
[0026] When the top test is performed, the host computer gives an instruction signal of the test electric cylinder 2, the piston rod of the test electric cylinder 2 is extended, and the loading force is realized by the data acquisition of the force sensor 8. At this time, the oil supplied by the main motor pump set 10 on the main circuit is filtered through the main filter 12, the right end electromagnet (b end in the figure) of the three-position four-way electromagnetic reversing valve I 13 is electrified, the oil liquid parallel position enters the rodless cavity of the loading oil cylinder 3 through the first hydraulic lock 14, when the output force of the test electric cylinder 2 is greater than the loading force, the loading oil cylinder 3 is in the state of retracting backward, in the retracting process, the pilot motor pump set 23 on the pilot circuit supplies oil, the electromagnet of the first electromagnetic reversing valve 18 is electrified, under the action of the pilot pressure oil, the first hydraulic lock 14 is opened, the hydraulic oil reverses into the first hydraulic lock 14, and then enters the loading relief valve group through the three-position four-way electromagnetic reversing valve II 32, the loading relief valve group is electrically proportional and can infinitely adjust the loading force. In the loading and retracting process of the loading oil cylinder 3, the electromagnet of the third electromagnetic reversing valve 20 on the pilot circuit is electrified, the hydraulic oil in the rodless cavity of the loading oil cylinder 3 enters the rod cavity through the loading oil cylinder 3, and the loading oil cylinder 3 is in the differential state.
[0027] Among them, the loading relief valve group is provided with a first loading relief valve 21 and a second loading relief valve 22 with two different flow specifications. In this way, the speed and pressure of the loading oil cylinder 3 in the loading movement process are stable and controllable, the first loading relief valve 21 is selected in the small flow loading action, the second loading relief valve 22 is switched to in the large flow loading movement, and the large and small flow loading channels are switched through the second electromagnetic reversing valve 19.
[0028] The advantages of the differential state of the loading cylinder 3 are that when the low pressure side of the loading cylinder 3 is supplemented with oil, the pump displacement and motor power of the oil supplement motor pump group 23 on the oil supplement circuit can be appropriately reduced because the hydraulic oil in the rodless cavity is sufficient to supplement the rod cavity (size cavity volume difference), which saves power loss; in addition, the loading force will decrease when the loading cylinder 3 is in the differential state, and in order to achieve the control requirement of the loading force, it is necessary to increase the setting pressure of the loading relief valve, and in the differential state, the setting pressure range of the loading relief valve is wider, which increases the loading force control range of the tested electric cylinder 2 and makes the loading force control more accurate.
[0029] When the pull test is performed, the right end electromagnet (a end in the figure) of the three-position four-way electromagnetic reversing valve I13 is powered, and the hydraulic oil enters the rod cavity of the loading cylinder 3 through the first hydraulic lock 14 through the cross position of the three-position four-way electromagnetic reversing valve I13; when the output force of the tested electric cylinder 2 is greater than the loading force, the loading cylinder 3 is in the forward extension state, and in the extension process, the pilot motor pump group 23 of the pilot circuit supplies oil, the electromagnet of the second electromagnetic reversing valve 19 is powered, and under the action of the pilot pressure oil, the second hydraulic lock 15 is opened, and the oil reversely enters the second hydraulic lock 15 through the three-position four-way electromagnetic reversing valve II32 to enter the loading relief valve group to perform proportional loading, and the oil supplement motor pump group 23 supplements the rodless cavity of the loading cylinder 3 through the oil supplement filter 24, the three-position four-way electromagnetic reversing valve I13 and the first hydraulic lock 14 in turn; in this process, the displacement sensor 9 in the loading cylinder 3 collects the displacement data of the loading movement in real time.
[0030] Based on the above ideal embodiments of the present application, through the above description, relevant personnel can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content in the specification, and the technical scope must be determined according to the scope of claims.
Claims
1. An electric cylinder loading test bench, characterized in that: The test bench includes a frame (1) and a test electric cylinder (2), a loading cylinder (3) and a linear guide rail (4) mounted on the frame (1). The test electric cylinder (2) and the loading cylinder (3) are respectively mounted at both ends of the frame (1), and the output end of the loading cylinder (3) is connected to the piston rod end of the test electric cylinder (2) through a connector (7). A force sensor (8) is provided at the connection between the two. The connector (7) is set on the linear guide rail (4). A displacement sensor (9) is installed in the rodless chamber of the loading cylinder (3). The loading cylinder (3) is connected to a hydraulic system (100). The hydraulic system (100) includes a hydraulic oil tank, a main circuit, a pilot circuit and a replenishment circuit. A loading overflow valve group is provided on the pilot circuit.
2. The electric cylinder loading test bench according to claim 1, characterized in that: The main circuit is equipped with a main motor pump group (10), a main filter (12), a three-position four-way solenoid valve I (13), a first hydraulic lock (14) and a second hydraulic lock (15). A three-position four-way solenoid valve II (32) is provided between the main filter (12) and the three-position four-way solenoid valve I (13). The three-position four-way solenoid valve II (32) is connected to the loading overflow valve group.
3. The electric cylinder loading test bench according to claim 2, characterized in that: The pilot circuit is provided with a pilot motor pump group (16), a pilot filter (17), a first solenoid directional valve (18) and a second solenoid directional valve (19). The first solenoid directional valve (18) is electrically connected to the first hydraulic lock (14), and the second solenoid directional valve (19) is electrically connected to the second hydraulic lock (15).
4. The electric cylinder loading test bench according to claim 3, characterized in that: A third solenoid directional valve (20) is connected between the first hydraulic lock (14) and the second hydraulic lock (15).
5. The electric cylinder loading test bench according to claim 2, characterized in that: The loading overflow valve group includes a first loading overflow valve (21) and a second loading overflow valve (22). The first loading overflow valve (21) is connected to the working chamber A of the three-position four-way solenoid valve II (32), and the second loading overflow valve (22) is connected to the working chamber B of the three-position four-way solenoid valve II (32).
6. The electric cylinder loading test bench according to claim 2, characterized in that: The oil replenishment circuit is equipped with an oil replenishment motor pump set (23) and an oil replenishment filter (24).
7. The electric cylinder loading test bench according to claim 2, characterized in that: It also includes a return oil pipe (27) and a heat exchanger (25). A back pressure valve (26) is provided on the pipeline between the heat exchanger (25) and the hydraulic oil tank. The return oil pipe (27) is connected between the back pressure valve (26) and the heat exchanger (25). The return oil pipe (27) is connected to a first check valve (28) and a second check valve (29). The other end of the first check valve (28) is connected to the pipeline between the first hydraulic lock (14) and the rodless chamber of the loading cylinder (3). The other end of the second check valve (29) is connected to the pipeline between the second hydraulic lock (15) and the rod chamber of the loading cylinder (3).
8. The electric cylinder loading test bench according to claim 1, characterized in that: The hydraulic oil tank is equipped with a level sensor (30) and an oil temperature sensor (31).
9. The electric cylinder loading test bench according to claim 1, characterized in that: The top surface of the test stand (1) is provided with a cover plate (11), and keyways (111) are evenly arranged on the cover plate (11); the test electric cylinder (2) is connected to the first mounting ear plate (5), and the bottom of the first mounting ear plate (5) is provided with a flat key that mates with the keyway (111); the loading cylinder (3) is connected to the second mounting ear plate (6), and the bottom of the second mounting ear plate (6) is provided with a flat key that mates with the keyway (111).
10. The electric cylinder loading test bench according to claim 1, characterized in that: The linear guide (4) is provided with a slider that moves back and forth along it, and the slider is connected to the connector (7).