阅读说明：本技术 一种自卸车举升液压缸模拟工况试验装置 (Dumper lifting hydraulic cylinder simulation working condition test device ) 是由 李永奇 王伟伟 刘庆教 李小明 张强 汤宝石 于 2021-09-18 设计创作，主要内容包括：本发明公布一种自卸车举升液压缸模拟工况试验装置,属于液压缸技术领域。地基上安装有固定底板和支座Ⅳ；固定底板螺纹孔连接有支座Ⅰ；支座Ⅰ与被试液压缸缸筒销轴铰接；加载车厢后端与支座Ⅳ铰接,加载车厢后端靠下位置固定有限位块；加载车厢前端螺纹孔连接有支座Ⅱ；支座Ⅱ与被试油缸活塞杆套筒销轴铰接；加载车厢下侧固定有回位导向装置,地基上开设有导向沉孔；加载车厢上固定有均布的螺栓Ⅱ,螺栓Ⅱ上选择性安装载荷块。本发明通过调整载荷块的数量来匹配实际载荷,最大限度的模拟举升缸工作时的相关工况,来检验其伸出顺序、卡死、拉缸、抖响、漏油、使用寿命等相关性能,既杜绝了安全隐患又极大的降低了相关成本。(The invention discloses a dumper lifting hydraulic cylinder simulation working condition test device, and belongs to the technical field of hydraulic cylinders. A fixed bottom plate and a support IV are arranged on the foundation; the threaded hole of the fixed bottom plate is connected with a support I; the support I is hinged with a cylinder barrel pin shaft of the tested hydraulic cylinder; the rear end of the loading carriage is hinged with the support IV, and a limiting block is fixed at the lower position close to the rear end of the loading carriage; a threaded hole at the front end of the loading carriage is connected with a support II; the support II is hinged with a tested oil cylinder piston rod sleeve through a pin shaft; a return guide device is fixed on the lower side of the loading carriage, and a guide counter bore is formed in the foundation; evenly distributed bolts II are fixed on the loading carriage, and load blocks are selectively mounted on the bolts II. The invention matches the actual load by adjusting the number of the load blocks, simulates the relevant working conditions of the lifting cylinder during working to the maximum extent, and tests the relevant performances of the lifting cylinder, such as extension sequence, jamming, cylinder pulling, cylinder shaking, oil leakage, service life and the like, thereby not only putting an end to the potential safety hazard, but also greatly reducing the relevant cost.)

1. A dumper lifting hydraulic cylinder simulation working condition test device,

the method is characterized in that:

a fixed bottom plate (2) and a support IV (9) are arranged on the foundation (1); a plurality of threaded holes which are distributed in a rectangular shape are formed in the fixed base plate (2), and the threaded holes of the fixed base plate (2) are connected with a support I (3); the support I (3) is hinged with a cylinder barrel pin shaft of the tested hydraulic cylinder (5);

the rear end of the loading carriage (6) is hinged with a support IV (9), and a limiting block (8) matched with the support IV (9) is fixed at the lower position of the rear end of the loading carriage (6); the front end of the loading carriage (6) is provided with a plurality of threaded holes which are distributed in a rectangular shape, and the threaded holes at the front end of the loading carriage (6) are connected with a support II (4); the support II (4) is hinged with a piston rod sleeve pin shaft of the tested oil cylinder (5);

a return guide device (12) is fixed on the lower side of the loading carriage (6), and a guide counter bore matched with the return guide device (12) is formed in the foundation (1);

and uniformly distributed bolts II (11) are fixed on the loading carriage (6), and load blocks (10) are selectively mounted on the bolts II (11).

2. The dumper lifting hydraulic cylinder simulated working condition test device according to claim 1, characterized in that: and 2 rows of bolts II (11) on the loading carriage (6) are arranged, and the 2 rows of bolts II (11) are symmetrically arranged along the central line of the loading carriage (6).

3. The dumper lifting hydraulic cylinder simulated working condition test device according to claim 1, characterized in that: the bolts II (11) are arranged in pairs; the load block (10) is square and fast, and 2 through holes matched with the paired bolts II (11) are formed in the central line of the load block (10).

4. The dumper lifting hydraulic cylinder simulated working condition test device according to claim 1, characterized in that: the fixed bottom plate (2) is fixed on the foundation (1) through foundation bolts.

5. The dumper lifting hydraulic cylinder simulated working condition test device according to claim 1, characterized in that: the support IV (9) is fixed on the foundation (1) through foundation bolts, and the number of the support IV (9) is 3; and 3 supports III (7) which are opposite to the supports IV (9) one by one are fixed at the lower position of the rear end of the loading carriage (6), and the supports III (7) are hinged with the supports IV (9) one by one.

6. The dumper lifting hydraulic cylinder simulated working condition test device according to claim 1, characterized in that: the return guide device (12) is a cylinder vertical to the loading carriage (6).

Technical Field

The invention relates to the technical field of hydraulic cylinders, in particular to a dumper lifting hydraulic cylinder simulation working condition test device.

Background

With the development of domestic economy, the foundation construction is emerging, and more dump trucks are used in the aspects of high-grade highway maintenance and earthwork. The reliability of a lifting hydraulic cylinder serving as a key part of a dump truck is concerned by more and more host customers, and particularly, a simulation working condition test before the dump truck leaves a factory and is installed is a key step for testing the performance of the dump truck.

At present, manufacturers of domestic dumper lifting hydraulic cylinders basically have no relevant test means, and most hydraulic cylinder test beds are in a factory test stage. The conventional method comprises the following steps: the test device of the lifting cylinder of the dumper is generally horizontally placed, a piston rod extends out along the axis direction, and a delivery test is carried out by a method of retracting the additional device.

The performance of the hydraulic cylinder under the actual working condition can not be verified through the test, once the hydraulic cylinder is installed, the disassembly, factory return and repair costs are too high, and when the hydraulic cylinder is installed, the vehicle is damaged, and people die, so that great potential safety hazards exist.

Disclosure of Invention

In order to solve the technical problem, the invention provides a dumper lifting hydraulic cylinder simulation working condition test device.

The invention is realized by the following technical scheme: a dumper lifting hydraulic cylinder simulation working condition test device is characterized in that a foundation is provided with a fixed bottom plate and a support IV; the fixed base plate is provided with a plurality of threaded holes which are distributed in a rectangular shape, and the threaded holes of the fixed base plate are connected with a support I; the support I is hinged with a cylinder barrel pin shaft of the tested hydraulic cylinder; the rear end of the loading carriage is hinged with the support IV, and a limiting block matched with the support IV is fixed at the lower position of the rear end of the loading carriage; the front end of the loading carriage is provided with a plurality of threaded holes which are distributed in a rectangular shape, and the threaded holes at the front end of the loading carriage are connected with a support II; the support II is hinged with a pin shaft of a piston rod sleeve of the tested oil cylinder; a return guide device is fixed on the lower side of the loading carriage, and a guide counter bore matched with the return guide device is formed in the foundation; and uniformly distributed bolts II are fixed on the loading carriage, and load blocks are selectively mounted on the bolts II.

It further comprises the following steps: and 2 rows of bolts II are arranged on the loading carriage, and the 2 rows of bolts II are symmetrically arranged along the central line of the loading carriage.

The bolts II are arranged in pairs; the load block is square fast, has seted up 2 on the load block central line and has mated II complex through-holes of bolt in pairs.

The fixed bottom plate is fixed on the foundation through foundation bolts.

The support IV is fixed on the foundation through foundation bolts, and the number of the support IV is 3; and 3 support seats III which are one-to-one opposite to the support seats IV are fixed at the lower position of the rear end of the loading carriage, and the support seats III are hinged with the support seats IV one-to-one opposite.

The return guide device is a cylinder perpendicular to the loading carriage.

Compared with the prior art, the invention has the beneficial effects that:

the principle and the structure are simple, the design and manufacturing cost is low, the compatibility of the simulation working condition test device is high, and the device is suitable for the test of most lifting hydraulic cylinder products at present;

by arranging two lines of variable loading loads, offset load pressure can be set, the number of load blocks is adjusted to match with actual load, loading tests on the tested lifting hydraulic cylinder under fixed load are realized, and relevant working conditions of the lifting cylinder during working are simulated to the maximum extent to test relevant performances such as the extending sequence, the clamping, the cylinder pulling, the vibration, the oil leakage, the service life and the like of the lifting cylinder;

the bottom of the tail part of the loading carriage is provided with a limiting block which is matched with the mounting height of a support II at the front end of the loading carriage, so that the piston rod of the tested hydraulic cylinder can be prevented from moving to the limit stroke, and the collision and damage of internal parts are avoided;

and a return guide device is arranged at the bottom of the loading carriage and matched with a guide counter bore of the foundation for simulating the accurate return of the loading carriage under the unbalance loading force.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a top view of the present invention;

FIG. 3 is a left side view of the present invention;

FIG. 4 is a view taken along line A-A of FIG. 1;

in the figure: 1. a foundation; 2. fixing the bottom plate; 3. a support I; 4. a support II; 5. a tested hydraulic cylinder; 6. loading a carriage; 7. a support III; 8. a limiting block; 9. a support IV; 10. a load block; 11. a bolt II; 12. a return guide device; 13. a bolt II; 14. and a bolt III.

Detailed Description

The following is a specific embodiment of the present invention, which will be further described with reference to the accompanying drawings.

Referring to fig. 1 to 4, a simulated working condition test device for a lifting hydraulic cylinder of a dump truck comprises a tested hydraulic cylinder 5, a simulated mounting rack and a loading device.

The simulation installation skid comprises a foundation 1 and a loading carriage 6. Fixing base plate 2 is fixed in on ground 1 through rag bolt, sets up a plurality of screw holes that are the rectangular distribution on fixing base plate 2, and 2 screw holes of fixing base plate are connected with support I3. The support I3 is hinged with a cylinder barrel pin shaft of the tested hydraulic cylinder 5. A plurality of threaded holes which are distributed in a rectangular shape are formed in the front end of the loading carriage 6, and a support II 4 is connected with the threaded hole in the front end of the loading carriage 6. The support II 4 is hinged with a piston rod sleeve pin shaft of the tested oil cylinder 5, and the installation of the tested oil cylinder 5 completely simulates the installation form of the lifting oil cylinder on the dump truck. The threaded holes distributed in a rectangular mode on the fixing base plate 2 can adjust the position of the support I3 on the fixing base plate 2 and replace the support I3 with different pin shaft hole sizes to match different lifting hydraulic cylinder pin shaft sizes. The threaded holes in rectangular distribution at the front end of the loading carriage 6 can adjust the position of the support II 4 on the loading carriage 6 and replace the support II 4 with different pin shaft hole sizes to match with different pin shaft sizes of the piston rod sleeve of the lifting cylinder, so that the purpose that the same simulation mounting rack can be used for mounting and testing most of the lifting hydraulic cylinders is achieved.

The support IV 9 is fixed on the foundation 1 through foundation bolts, and the number of the support IV 9 is 3. 3 support seats III 7 which are one-to-one corresponding to the support seats IV 9 are fixed at the lower position close to the rear end of the loading carriage 6, and the support seats III 7 are hinged with the support seats IV 9 one-to-one. When the piston rod of the tested hydraulic cylinder 5 extends out, the loading carriage 6 rotates around the position of the hinged shaft to lift, and the connection mode of the carriage of the dump truck is completely simulated.

The loading device comprises a load mass 10 mounted on the loading wagon 6. And 2 rows of bolts II 1 are fixed on the loading carriage 6, and load blocks 10 are selectively arranged on the bolts II 11. The 2 rows of bolts II 11 are symmetrically arranged along the center line of the loading compartment 6. The bolts II 11 are arranged in pairs, the load block 10 is square and fast, and 2 through holes matched with the paired bolts II 11 are formed in the central line of the load block 10. The maximum load weight of different dump trucks is simulated by adjusting the total load weight of the load blocks 10 placed in the loading carriage 6, certain offset load force is provided by setting different positions of the load blocks 10, and the working condition of a lifting oil cylinder of the dump truck during working is simulated to the maximum extent; therefore, the extending sequence, the blocking, the cylinder pulling, the vibration, the oil leakage, the service life and other relevant performances of the tested hydraulic cylinder 5 are accurately checked.

A return guide 12 is fixed on the lower side of the loading carriage 6, and the return guide 12 is a cylinder vertically welded on the loading carriage 6. The foundation 1 is provided with a guiding counter bore matched with the return guiding device 12. The return guide device 12 can be used for detecting the accurate return of the simulation loading carriage 6 under heavy load and unbalanced load in cooperation with the arrangement of the load block 10.

And a fixed limiting block 8 is arranged at the lower part of the rear end of the loading carriage 6, and the fixed limiting block 8 is matched with a support IV 9. The mounting height of 6 front end supports II 4 in cooperation loading carriage can prevent to be surveyed 5 piston rods of pneumatic cylinder and move to the limit stroke, avoids causing and is surveyed 5 inside spare parts collision damage of pneumatic cylinder.

The simulated working condition test device in the embodiment is used for a simulation test before the dump truck lifting hydraulic cylinder leaves a factory and is capable of simulating the installation form of the dump truck lifting hydraulic cylinder and the load borne in the whole working period and circularly loading, so that the reliability and the service life of the lifting hydraulic cylinder under the load condition can be tested, and various performance indexes such as the extension sequence of a piston rod, the lowest stable running speed, the external leakage and the like can be tested. By carrying out the simulation working condition test before the lifting hydraulic cylinder leaves the factory, the potential safety hazard is avoided, and the related cost is greatly reduced.