Tool and method for testing central swivel joint of wood clamping device

Abstract

The invention discloses a tool and method for testing a central rotary joint of a wood clamping device, and the tool comprises a test board, a plurality of supporting seats which are horizontally disposed on the test board, and a rotary bearing which is disposed at the center of each supporting seat and drives the central rotary joint to rotate. Hydraulic motor assemblies used for driving the slewing bearing to rotate are correspondingly arranged on the edges of every two adjacent supporting seats respectively, a plurality of central slewing joints are arranged above the periphery of the slewing bearing at equal intervals, and connecting assemblies used for supporting the central slewing joints to rotate are arranged on the supporting seats. The upper end of the connecting assembly is in transmission with the central rotary joint, and the lower end of the connecting assembly is in transmission with the rotary bearing. The test tool can simultaneously test whether oil ducts of a plurality of central rotary joints are through, whether rotation is smooth and whether the joints leak oil, is convenient to mount and dismount, improves the test efficiency, and saves the test time.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of engineering machinery, and particularly relates to a central rotary joint testing tool and testing method of a wood clamp. BACKGROUND

[0002] The central rotary joint is an important part of the wood clamp of a digging machine accessory, and the testing of the central rotary joint before leaving the factory is a key link for guaranteeing the quality. At present, the testing schemes of the central rotary joint of the wood clamp of various manufacturers are various, and the technology is very mature. A pump station is used to connect a pipeline on the central rotary joint, oil is supplied to apply a certain pressure, the actual working condition of the wood clamp is simulated, and whether it is qualified and meets the leaving factory requirement is tested. At present, the testing method of the central rotary joint is relatively single, and the testing items mainly include whether two oil channels are connected, whether the joint rotation is smooth, whether the shell and the core shaft connection are oiled, and whether the oil leaks, etc. The current mainstream testing tool and device of the central rotary joint have the problems of small number of single testing, single testing item, incapability of simultaneously testing multiple items, and inconvenience of disassembling and assembling the connection tool of each central rotary joint in the testing process, which seriously affects the testing efficiency. SUMMARY

[0003] The present application aims to provide a central rotary joint testing tool and testing method of a wood clamp, which can simultaneously test whether the oil channels of multiple central rotary joints are connected, whether the rotation is smooth, and whether the joint leaks, is convenient to install and disassemble, improves the testing efficiency, and saves the testing time. In order to achieve the above-mentioned purpose, the following technical effects are adopted: According to one aspect of the present application, a central rotary joint testing tool of a wood clamp is provided, which comprises a testing table, multiple support seats horizontally arranged on the testing table, a rotary support arranged in the center of the support seat and used for driving the rotation of the central rotary joint, a hydraulic motor assembly arranged at the edge of each adjacent support seat and used for driving the rotation of the rotary support, multiple central rotary joints arranged at equal intervals above the outer periphery of the rotary support 3, a connection assembly arranged on the support seat and used for supporting the rotation of each central rotary joint, the upper end of the connection assembly being in transmission with the central rotary joint, and the lower end of the connection assembly being in transmission with the rotary support.

[0004] In a further preferred embodiment of the above scheme, the connecting assembly includes a first connecting assembly and a second connecting assembly. The bottom of the support base is fixed to the test bench surface by multiple vertical support columns. A bearing support hole for mounting a slewing bearing is provided in the center of the support base. The lower surface of the inner ring of the slewing bearing is fixed to the support base surface outside the edge of the bearing support hole. The first connecting assembly is vertically arranged below the rear side of each central slewing joint and on the upper surface of the inner ring of the slewing bearing. The lower end of the first connecting assembly is fixed to the upper surface of the inner ring of the slewing bearing. The fixed end of the central slewing joint is fixed to the upper end of the first connecting assembly. A second connecting assembly that drives the slewing bearing is provided on the support base surface below the slewing end of each central slewing joint. A drive gear that meshes with the slewing bearing is provided on the output shaft of the hydraulic motor assembly.

[0005] In a further preferred embodiment of the above scheme, the first connecting component includes a lower fixing member, an upper fixing member, and a connecting column. The lower fixing member is fixed on the inner ring of the slewing bearing. The lower end of the connecting column is vertically fixed on the lower fixing member. The upper end of the upper fixing member is horizontally fixed on the upper end of the connecting column. A positioning support plate connected to the rear side of the central slewing joint is horizontally provided on the surface of the upper fixing member. The central slewing joint is vertically fixed at equal intervals along the edge of the fixed support plate.

[0006] In a further preferred embodiment of the above scheme, the second connecting assembly includes a fixed sleeve, a connecting shaft, and a rotary gear. A recessed hole coaxial with the fixed sleeve is provided on the support base. A lower deep groove ball bearing is disposed within the recessed hole. The central axis of the connecting shaft is collinear with the rotation center line of the central rotary joint 10. The lower deep groove ball bearing is sleeved on the lower outer wall of the connecting shaft. The upper end of the connecting shaft is close to the rotation end of the central rotary joint. The outer side of the upper end of the connecting shaft is connected to the outer wall of the rotation end of the central rotary joint via a transmission connection. A rotary gear is fitted on the outer wall of the connecting shaft above the ball bearing. A U-shaped opening is provided on the side of the slewing bearing and along the lower outer wall of the fixed sleeve, facing the direction of the lower deep groove ball bearing. The rotary gear extends out along the U-shaped opening and meshes with the slewing bearing. An upper deep groove ball bearing is fixedly fitted on the connecting shaft inside the upper end of the fixed sleeve. The outer ring of the upper deep groove ball bearing is fixedly connected to the inner wall of the fixed sleeve. An annular support disc is provided on the lower outer peripheral wall of the fixed sleeve along the rear side of the U-shaped opening. The lower end of the fixed sleeve is fixed to the support seat by the annular support disc.

[0007] In a further preferred embodiment of the above scheme, an outwardly protruding limiting part is provided on the outer wall of the connecting shaft inside the fixed sleeve. An upper deep groove ball bearing is sleeved on the connecting shaft on the upper side of the limiting part, and a lower connecting sleeve is provided on the lower side of the limiting part and fixed on the outer wall of the connecting shaft. The upper end of the lower connecting sleeve contacts the lower side of the limiting part, and the lower end of the lower connecting sleeve contacts the upper end of the rotary gear.

[0008] In a further preferred embodiment of the above scheme, an upper connecting sleeve is fitted onto the connecting shaft on the upper side of the upper deep groove ball bearing. The inner wall of the upper connecting sleeve is fixedly connected to the keyway on the side wall of the connecting shaft via a flat key. The outer wall of the upper connecting sleeve is drivenly connected to the outer wall of the rotating end of the central rotary joint via an adjustment assembly.

[0009] In a further preferred embodiment of the above scheme, a limiting fixing piece is provided at the upper end of the connecting shaft. The limiting fixing piece is fixed to the upper end of the connecting shaft by a hexagonal bolt along the axial direction, and the lower side of the limiting fixing piece contacts the upper end of the upper connecting sleeve.

[0010] In a further preferred embodiment of the above scheme, the adjustment assembly includes an adjustment sleeve and a transmission connector. The adjustment sleeve has fixing holes of different heights on its side wall. The adjustment sleeve is fixed to the outer peripheral wall of the upper connecting sleeve by fixing bolts on the fixing holes. The transmission connector, which can be adjusted up and down, is provided on the outer wall of the adjustment sleeve on the side opposite to the fixing holes. The lower end of the transmission connector is fixed to the outer wall of the adjustment sleeve. A limit pin is provided on the outer side wall of the rotating end of the central rotary joint. A locking space for receiving the limit pin is provided at the upper end of the transmission connector.

[0011] In a further preferred embodiment of the above scheme, an oil port plug is provided at the bottom of the rotating end of the central rotary joint, and a pair of oil pipe adapters are provided at the top of the central rotary joint. The fixed end of the oil pipe adapter is connected to the oil inlet at the top of the central rotary joint through a first direct connector, and the free end of the oil pipe adapter is connected to a right-angle connector through a second direct connector.

[0012] Oil supply pipes, return pipes, and oil distribution blocks are respectively installed on the front and rear sides of the test bench. The main oil supply pipe and the return pipe are connected to the hydraulic pump through a solenoid valve assembly. The first oil outlet of the solenoid valve assembly is connected to the oil inlet of the hydraulic motor assembly through a first branch oil supply pipe. The oil return port of the hydraulic motor assembly is connected to the first oil return port of the solenoid valve assembly through a first return branch pipe. The second oil outlet of the solenoid valve assembly is connected to the oil inlet of the oil distribution block through a second branch oil supply pipe. Each oil outlet of the oil distribution block is connected to the oil inlet of the central adapter through an oil supply branch pipe. The oil outlet of the central adapter is connected to the oil return inlet of the oil distribution block through a return branch pipe. The oil return outlet of the oil distribution block is connected to the second oil return port of the solenoid valve assembly through a second return branch pipe. The oil return outlet of the solenoid valve is connected to the oil return port of the hydraulic pump through the main oil return pipe. The oil distribution block is fixed on the test bench by an oil block fixing bracket.

[0013] According to another aspect of the present invention, the present invention provides a testing method for the central rotary joint of a wood clamp, the testing method using a central rotary joint testing fixture of the present invention includes the following steps: Step 1: Fix the central rotary joint at intervals along the edge of the positioning support plate at the upper end of the first connecting component, and adjust the height of the adjusting component at the upper end of the second connecting component so that the limiting pins set on the outer side wall of the rotary end of each central rotary joint are placed in the locking space of the transmission connecting component. Step 2: Connect the branch oil supply and branch oil return pipes to the central rotary joint, so that the oil supply end and oil return end of the central rotary joint are connected to the oil tank through the hydraulic pump via the corresponding solenoid valve group. Step 3: Adjust the hydraulic pump pressure to meet the test pressure value, start the hydraulic pump, and the hydraulic pump sends the hydraulic oil in the oil tank to the solenoid valve group through the oil supply main pipe. The high-pressure hydraulic oil discharged from the first oil outlet of the solenoid valve group is sent to the hydraulic motor assembly through the first branch oil supply pipe. During the forward and reverse rotation of the hydraulic motor assembly, the rotating end of the central rotary joint is driven to rotate forward and reverse together. Step 4: Start the solenoid valve assembly, so that the solenoid valve assembly supplies oil to each central adapter through the oil distribution block. During the rotation of the rotating end of the central adapter, various parameter tests are performed on the central adapter. The hydraulic oil discharged from the oil outlet of the central adapter flows back to the oil tank through the oil distribution block, the solenoid valve assembly, and the hydraulic pump in sequence. Step 5: After the hydraulic oil flows back to the oil tank, disconnect the oil supply and return pipes of the central rotary joint currently being tested and inspected. Then, remove the upper end of the central rotary joint from the edge of the positioning support plate at the upper end of the first connecting component, so that the limiting pin on the outer wall of the rotating end of the central rotary joint leaves the locking space at the upper end of the transmission connector. The test and inspection of the central rotary joint is now complete.

[0014] In summary, the present invention adopts the above technical solution, and the present invention has the following technical effects: This invention can simultaneously test multiple central rotary joints for items such as whether the oil passages are unobstructed, whether the rotation is smooth, and whether the joints leak. Each central rotary joint is connected to a screw-connected fixture, and the oil ports (A and B ports) of the central rotary joint are connected using hydraulic quick couplings. The central rotary joints are easy to install and disassemble, improving testing efficiency and saving testing time. When testing multiple items simultaneously, this testing fixture can be connected to a hydraulic pump to test both rotation and pressurization simultaneously, resulting in more accurate testing. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a central rotary joint testing fixture for a wood clamp according to the present invention; Figure 2 This is a side view of the test fixture for the central rotary joint of a wood clamp according to the present invention. Figure 3 This is a test control schematic diagram of a central rotary joint test fixture for a wood clamp according to the present invention; Figure 4 This is a schematic diagram of the overall installation structure of the connecting component of the present invention; Figure 5 This is a schematic diagram of the overall installation structure of the first connecting component and the second connecting component of the present invention; Figure 6 This is an exploded structural diagram of the first connecting component and the second connecting component of the present invention; Figure 7 This is a schematic diagram of the overall structure of the second connecting component of the present invention; Figure 8 This is a cross-sectional view of the second connecting component of the present invention; Figure 9 This is a schematic diagram of the overall assembly structure of the connecting shaft of the present invention; Figure 10 This is a schematic diagram of the assembly structure of the connecting shaft and the rotary gear of the present invention; Figure 11 This is a schematic diagram of the structure of the adjustment component of the present invention; Figure 12 This is an overall schematic diagram of the central rotary joint of the present invention; In the attached diagram, the components are: test bench 1, support base 2, slewing bearing 3, hydraulic motor assembly 4, first connecting assembly 5, second connecting assembly 6, oil supply pipe 7, oil return pipe 7a, oil distribution block 8, central rotary joint 10, limit pin 10a, oil port plug 10b, oil pipe adapter 10c, first direct connector 10d, second direct connector 10e, right angle connector 10f, hydraulic pump 11, support column 20, bearing support hole 21, drive gear 40, and oil block fixing bracket 80. Lower fixing part 500, upper fixing part 501, connecting column 502, positioning support plate 503, fixing sleeve 600, annular support plate 600a, U-shaped opening 600b, connecting shaft 601, keyway 601a, limiting part 602, rotary gear 603, concave hole 604, lower deep groove ball bearing 605, upper deep groove ball bearing 606, lower connecting sleeve 607, upper connecting sleeve 608, flat key 608a, adjusting component 609, adjusting sleeve 609a, transmission connecting part 609b, fixing hole 609c, locking space 609d, limiting fixing piece 610. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, it should be noted that many details listed in the specification are merely to provide the reader with a thorough understanding of one or more aspects of the present invention, and these aspects of the invention can be implemented even without these specific details.

[0017] Combination Figure 1 , Figure 2 and Figure 3As shown, a testing fixture for a central rotary joint of a wood clamp according to the present invention includes a test platform 1 and multiple support seats 2 horizontally arranged on the test platform 1. The bottom of each support seat 2 is fixed to the surface of the test platform 1 by multiple vertical support columns 20. A rotary bearing 3 for driving the central rotary joint 10 to rotate is arranged in the center of each support seat 2. A hydraulic motor assembly 4 for driving the rotary bearing 3 to rotate is arranged correspondingly on the edge of each adjacent support seat 2. Multiple central rotary joints 10 are arranged at equal intervals above the outer periphery of the rotary bearing 3. A connecting rod for supporting each central rotary joint 10 is provided on the support seat 2. A connecting assembly is provided, the upper end of which is driven by the central rotary joint 10, and the lower end of which is driven by the slewing bearing 3. A connecting assembly is provided on the support base 2 and is driven by the slewing bearing 3. The connecting assembly supports each central rotary joint 10 and rotates together with the slewing bearing 3. The connecting assembly includes a first connecting assembly 5 and a second connecting assembly 6. The first connecting assembly 5 is vertically arranged below the rear side of each central rotary joint 10 and on the upper surface of the inner ring of the slewing bearing 3. The lower end of the first connecting assembly 5 is fixed to the upper surface of the inner ring of the slewing bearing 3. The fixed end of the central rotary joint 10 is fixed to... At the upper end of the first connecting component 5, a second connecting component 6 is provided on the surface of the support base 2 below the rotating end of each central rotary joint 10, which is driven by the slewing bearing 3. A drive gear 40 that meshes with the slewing bearing 3 is provided on the output shaft of the hydraulic motor assembly 4. An oil supply pipe 7, an oil return pipe 7a, and an oil distribution block 8 are respectively provided on the front and rear sides of the test bench 2. The main oil supply pipe 7 and the oil return pipe 7a are respectively connected to the hydraulic pump 11 through the solenoid valve group (9). The first oil outlet of the solenoid valve group 9 is connected to the oil inlet of the hydraulic motor assembly 4 through the first branch oil supply pipe. The oil return port of the hydraulic motor assembly 4 is connected to the first return oil supply pipe. The branch pipe is connected to the first return port of the solenoid valve group 9. The second outlet of the solenoid valve group 9 is connected to the inlet of the oil distribution block 8 through the second branch oil supply pipe. Each outlet of the oil distribution block 8 is connected to the inlet of the central adapter 10 through the oil supply branch pipe. The outlet of the central adapter 10 is connected to the return inlet of the oil distribution block 8 through the return branch pipe. The return outlet of the oil distribution block 8 is connected to the second return port of the solenoid valve group 9 through the second return branch pipe. The return outlet of the solenoid valve 9 is connected to the return port of the hydraulic pump 12 through the return main pipe 7a. The oil distribution block 8 is fixed on the test bench 2 by the oil block fixing bracket 80.

[0018] In this invention, after combining Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6As shown, a bearing support hole 21 for mounting a slewing bearing 3 is provided in the center of the support base 2. The lower surface of the inner ring of the slewing bearing 3 is fixed to the surface of the support base 2 on the outer edge of the bearing support hole 21. The first connecting assembly 5 includes a lower fixing member 500, an upper fixing member 501, and a connecting column 502. The lower fixing member 500 is fixed to the inner ring of the slewing bearing 3. The lower end of the connecting column 502 is vertically fixed to the lower fixing member 501. The upper end of the upper fixing member 501 is horizontally fixed to the upper end of the connecting column 502. A central slewing joint is horizontally provided on the surface of the upper fixing member 501. The central rotary joint 10 is vertically fixed at equal intervals along the edge of the fixed support plate 503 connected to the rear side of the 10. The lower fixing member 500 and the upper fixing member 501 are symmetrical circular support plates. The positioning support plate 503 is an annular support plate. The upper end of the central rotary joint 10 and the upper outer wall of the hydraulic motor assembly 4 are respectively supported and fixed on the edge of the positioning support plate 503. The lower outer wall of the hydraulic motor assembly 4 is supported and fixed on the support base 2. The lower output shaft of the hydraulic motor assembly 4 drives the rotary bearing 3 to rotate on the support base 2 through the drive gear 40.

[0019] In this invention, Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9As shown, the second connecting assembly 6 includes a fixed sleeve 600, a connecting shaft 601, and a rotary gear 603. A recessed hole 604, coaxial with the fixed sleeve 600, is provided on the support base 2. A lower deep groove ball bearing 605 is disposed within the recessed hole 604. The central axis of the connecting shaft 601 is aligned vertically with the rotation center line of the central rotary joint 10. The lower deep groove ball bearing 605 is sleeved on the lower outer wall of the connecting shaft 601. The upper end of the connecting shaft 601 is close to the rotation end of the central rotary joint 10. The outer surface of the upper end of the connecting shaft 601 is connected to the... The central rotary joint 10 is connected to the outer wall of the rotating end for transmission. A rotary gear 603 is sleeved on the outer wall of the connecting shaft 601 above the lower deep groove ball bearing 605. A U-shaped opening 600b is provided on one side of the slewing support 3 and along the lower end of the outer wall of the fixed sleeve 600, facing the lower deep groove ball bearing 605. The rotary gear 603 extends out along the U-shaped opening 600b and meshes with the slewing support 3. An upper deep groove ball bearing 606 is fixedly sleeved on the connecting shaft 601 inside the upper end of the fixed sleeve 600. The outer ring of the upper deep groove ball bearing 606 is connected to the fixed sleeve 600. The inner wall is fixedly connected, and an annular support plate 600a is provided on the lower outer peripheral wall of the fixed sleeve 600 along the rear side of the U-shaped opening 600b. The lower end of the fixed sleeve 600 is fixed to the support base 2 by the annular support plate 600a. An outwardly protruding limiting part 602 is provided on the outer wall of the connecting shaft 601 inside the fixed sleeve 600. An upper deep groove ball bearing 606 is sleeved on the connecting shaft 601 on the upper side of the limiting part 602. A lower connecting sleeve 607 is provided on the lower side of the limiting part 602 and fixed to the outer wall of the connecting shaft 601. The upper end of 7 contacts the lower side of the limiting part 602, and the lower end of the lower connecting sleeve 607 contacts the upper end of the rotary gear 603; an upper connecting sleeve 608 is sleeved on the connecting shaft 601 above the upper deep groove ball bearing 606. The inner wall of the upper connecting sleeve 608 is fixedly connected to the keyway 601a on the side wall of the connecting shaft 601 by a flat key 608a. The flat key 608a is installed in the keyway 601a of the connecting shaft 601. The upper connecting sleeve 608 is fixedly installed on the connecting shaft 601 by the cooperation of the flat key and the keyway to prevent the upper connecting sleeve 608 from sliding on the connecting shaft 601. The outer wall of the upper connecting sleeve 608 is connected to the outer wall of the rotating end of the central rotary joint 10 via the adjusting component 609. A limiting fixing piece 610 is provided at the upper end of the connecting shaft 601. The limiting fixing piece 610 is fixed to the upper end of the connecting shaft 601 by a hexagonal bolt 611 along the axial direction. The lower side of the limiting fixing piece 610 contacts the upper end of the upper connecting sleeve 608, thus restricting and fixing the upper connecting sleeve 608 on the connecting shaft 7. When the connecting shaft 601 rotates, it prevents the upper connecting sleeve 608 from shifting on the connecting shaft 601.This invention provides a lower deep groove ball bearing 605 and an upper deep groove ball bearing 606 at the lower and upper ends of a fixed sleeve 600, respectively. The lower deep groove ball bearing 605 connects to the lower end of a connecting shaft 601 outside the lower end of the fixed sleeve 600. A rotary gear 603 is installed on the connecting shaft 601 above the lower deep groove ball bearing 605 and inside the lower end of the fixed sleeve 600. This allows the connecting shaft 601 to be vertically and stably installed inside the fixed sleeve 600 via the lower deep groove ball bearing 605 and the upper deep groove ball bearing 606. The upper plane of the lower deep groove ball bearing 605 limits the height of the rotary gear 603, preventing it from displacing downwards. The lower connecting sleeve 607 limits the height of the connecting shaft 601, preventing it from displacing downwards.

[0020] In this invention, combined with Figure 6 , Figure 7 , Figure 8 and Figure 11 As shown, the adjustment assembly 609 includes an adjustment sleeve 609a and a transmission connector 609b. The adjustment sleeve 609a has fixing holes 609c of different heights on its side wall. The adjustment sleeve 609a is fixed to the outer peripheral wall of the upper connecting sleeve 608 by fixing bolts on the fixing holes 609c. The transmission connector 609b, which can be adjusted vertically, is provided on the outer wall of the adjustment sleeve 609a on the side opposite to the fixing holes 609c. The lower end of the transmission connector 609b is fixed to the outer wall of the adjustment sleeve 609a. A limit pin 10a is provided on the outer wall of the rotating end of the central rotary joint 10. A locking space 609d is provided at the upper end of the transmission connector 609b to accommodate the limit pin 10a. The transmission connector 609b is a transmission connecting plate vertically fixed to the outer wall of the adjustment sleeve 609a. The limit pin 10a extends from the locking space 609d to the outer side of the transmission connector 609b. 609d is either a U-shaped bayonet set at the top of the transmission connecting plate 609b or a pin hole placed on the side wall of the top of the transmission connecting plate 609b. When the rotary gear 603 drives the connecting shaft 601 to rotate, the connecting shaft 601 drives the lower connecting sleeve 607, the upper connecting sleeve 608, the adjusting sleeve 609a, and the transmission connecting piece 609b to rotate together. During the rotation of the transmission connecting plate 609b, the transmission connecting plate 609b drives the limiting pin 10 that passes through the locking space 609d. Drive the rotation end of the central rotary joint 10 to rotate. The locking space 609d always locks the limiting pin 10a of the central rotary joint 15, realizing the rotation test of the rotation end of the central rotary joint 10. When adjusting the position height of the limiting pin 10a on the rotation end of the central rotary joint 10 and the locking space 609d, the adjusting sleeve 609a is fixed on the upper connecting sleeve 608 after adjusting the height position of the adjusting sleeve 609a.

[0021] Combination Figure 6As shown, an oil port plug 10b is provided at the bottom of the rotating end of the central rotary joint 10, and a pair of oil pipe adapters 10c are provided at the top of the central rotary joint 10. The fixed end of the oil pipe adapter 10c is connected to the oil port at the top of the central rotary joint 10 through a first direct connector 10d, and the free end of the oil pipe adapter 10c is connected to a right angle connector 10f through a second direct connector 10e. The oil supply branch pipe and the oil return branch pipe are quickly connected to the corresponding right angle connectors 10f, thereby realizing the rapid installation of the oil circuit of the central rotary joint 10.

[0022] Combined with appendix Figures 1 to 10 The working process of the test fixture of the present invention is further described below. The oil supply pipe 7 and return pipe 7a are connected to the hydraulic pump. The hydraulic pump pressure is adjusted to meet the test pressure value. The hydraulic pump is started, and the hydraulic pump sends the hydraulic oil in the tank to the solenoid valve assembly 9 through the main oil supply pipe. The high-pressure hydraulic oil discharged from the first outlet of the solenoid valve assembly 9 is sent to the hydraulic motor assembly 4 through the first branch oil supply pipe. The hydraulic oil drives the drive gear 40 on the output shaft of the hydraulic motor assembly 4 to rotate, thereby controlling the forward and reverse rotation of the hydraulic motor assembly 4 in the test bench. At the same time, the return oil of the hydraulic motor assembly 4... The hydraulic oil discharged from the oil port flows back to the oil tank through the solenoid valve group 9 and the hydraulic pump in sequence. When the drive gear 40 rotates, it drives the drive slewing bearing 3 meshing with it to rotate. When the slewing bearing 3 rotates, it drives multiple slewing gears 603 meshing with it to rotate. The connecting shaft 601 connected to each slewing gear 603 rotates. When the connecting shaft 601 rotates, it simultaneously drives the lower connecting sleeve 607, the upper connecting sleeve 608, the adjusting sleeve 609a, and the transmission connecting piece 609b to rotate together. The transmission connecting plate 609b drives the limiting pin 10a passing through the locking space 609d to drive the middle The rotating end of the central rotary joint 10 rotates, thereby driving the rotating end of the central rotary joint 10 fixed on the positioning support plate 503; the high-pressure hydraulic oil discharged from the second oil outlet of the start solenoid valve group 9 is sent to the oil distribution block 8 through the second branch oil supply pipe, and the high-pressure hydraulic oil discharged from each oil outlet of the oil distribution block 8 is sent to the oil inlet (port A) of the central rotary joint 10 through the oil supply branch pipe, thereby controlling the rotation of the rotating end of the central rotary joint 10. During the rotation of the rotating end of the central rotary joint 10, rotation tests and pressurization and other parameter tests are performed. Whether there is oil leakage at the oil port plug 10b at the rotating end of the head 10 can immediately reflect the sealing performance of the central adapter 10 during the high-pressure, high-speed rotation test. At the same time, the hydraulic oil discharged from the oil outlet (B port) of the central adapter 10 flows back to the oil tank through the oil distribution block 8, the solenoid valve group 9, and the hydraulic pump. The test fixture enables rapid testing of parameters such as whether the oil passages of multiple central rotary joints are unobstructed, whether the rotation is smooth, whether the joints are leaking, and the pressure. It is also easy to install and disassemble, improving testing efficiency and saving testing time.

[0023] Combined with appendix Figures 1 to 10 According to another aspect of the present invention, a method for testing a central rotary joint using a central rotary joint testing fixture of the present invention includes the following steps: Step 1: Fix the central rotary joint 10 at intervals along the edge of the positioning support plate 503 at the upper end of the first connecting assembly 5. Adjust the height of the adjusting component 609 at the upper end of the second connecting assembly 6 so that the limiting pins 10a provided on the outer side wall of the rotating end of each central rotary joint 10 are placed in the locking space 609d of the transmission connector 609b. Specifically, after adjusting the height of the adjusting sleeve 609a outside the upper connecting sleeve 608, pass the adjusting sleeve 609a through the fixing bolt on the fixing hole 609c. The transmission connector 609b is fixed on the outer peripheral wall of the upper connecting sleeve 608, so that the height of the transmission connector 609b provided on the outer wall of the adjusting sleeve 609a on the side of the fixing hole 609c can engage with the limiting pin 10a on the outer side wall of the rotating end of the central rotary joint 10. At this time, the limiting pin 10a on the outer side wall of the rotating end of the central rotary joint 10 is received in the locking space 609d at the upper end of the transmission connector 609b, and the limiting pin 10a extends out from the locking space 609d to the outer side of the transmission connector 609b. Step 2: Connect the branch oil supply and branch oil return pipes to the central rotary joint 10 so that the oil supply end and oil return end of the central rotary joint 10 are connected to the oil tank through the hydraulic pump via the corresponding solenoid valve group 9. Step 3: Adjust the hydraulic pump pressure to the test pressure value, start the hydraulic pump, and the hydraulic pump sends the hydraulic oil in the oil tank to the solenoid valve group 9 through the main oil supply pipe. The high-pressure hydraulic oil discharged from the first oil outlet of the solenoid valve group 9 is sent to the hydraulic motor assembly 4 through the first branch oil supply pipe. During the forward and reverse rotation of the hydraulic motor assembly 4, it drives the rotating end of the central rotary joint 10 to rotate forward and reverse together. More specifically, when the hydraulic motor assembly 4 rotates forward and reverse, the drive gear 40 on the output shaft of the hydraulic motor assembly 4 rotates forward and reverse, driving the drive slewing bearing 3 meshing with it to rotate. When the slewing bearing 3 rotates forward and reverse, the slewing bearing 3 drives each second connecting component 6 to rotate forward and reverse accordingly. The adjustment component 609 at the top of the second connecting component 6 drives the rotating end of the central rotary joint 10 to rotate in both directions. When the rotary bearing 3 rotates, it drives the multiple rotary gears 603 meshing with the rotary bearing 3 to rotate. The connecting shaft 601 connected to each rotary gear 603 rotates. When the connecting shaft 601 rotates, it simultaneously drives the lower connecting sleeve 607, the upper connecting sleeve 608, the adjustment sleeve 609a, and the transmission connecting piece 609b to rotate together. The transmission connecting plate 609b drives the limiting pin 10a passing through the locking space 609d to drive the rotating end of the central rotary joint 10 to rotate, thereby driving the rotating end of the central rotary joint 10 fixed on the positioning support plate 503 to rotate together. Step 4: Activate the solenoid valve assembly 9, causing it to supply oil to each central adapter 10 through the oil distribution block 8. During the rotation of the central adapter 10's rotating end, various parameter tests are performed on the central adapter 10, thereby achieving the rotational performance parameter tests of the central adapter 10. After activating the solenoid valve assembly 9, the high-pressure hydraulic oil discharged from the second oil outlet of the solenoid valve assembly 9 is sent to the oil distribution block 8 through the second branch oil supply pipe. The high-pressure hydraulic oil discharged from each oil outlet of the oil distribution block 8 is sent to the oil inlet (port A) of the central adapter 10 through the oil delivery branch pipe, thereby controlling the rotation of the central adapter 10's rotating end. During the rotation of the rotary end, various parameter tests are conducted to observe whether oil leakage occurs at the oil port plug 10b position at the rotary end of the central rotary joint 10. This allows for the determination of the sealing performance of the central rotary joint 10 during high-pressure and high-speed rotation tests. Simultaneously, the hydraulic oil discharged from the oil outlet (B port) of the central rotary joint 10 flows back to the oil tank via the oil distribution block 8, the solenoid valve group 9, and the hydraulic pump. The testing fixture enables rapid testing of parameters such as whether the oil passages of multiple central rotary joints are unobstructed, whether the rotation is smooth, whether the joints leak, and the pressure. It is also easy to install and disassemble, improving testing efficiency and saving testing time. Step 5: After the hydraulic oil flows back to the oil tank, disconnect the supply and return oil pipes of the central rotary joint 10 currently being tested and inspected. Then, remove the upper end of the central rotary joint 10 from the edge of the positioning support plate 503 at the upper end of the first connecting assembly 5, and remove the central rotary joint 10 from the first connecting assembly 5. This will cause the limiting pin 10a on the outer side wall of the rotating end of the central rotary joint 10 to leave the locking space 609d at the upper end of the transmission connector 609b. The test and inspection of the central rotary joint 10 are now complete.

[0024] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A testing fixture for the central rotary joint of a wood clamp, characterized in that: The test bench (1) includes multiple support seats (2) horizontally arranged on the test bench (1). A slewing bearing (3) for driving the central slewing joint (10) to rotate is arranged in the center of the support seat (2). A hydraulic motor assembly (4) for driving the slewing bearing (3) to rotate is arranged on the edge of each adjacent support seat (2). Multiple central slewing joints (10) are arranged at equal intervals above the outer periphery of the slewing bearing (3). A connecting component for supporting the rotation of each central slewing joint (10) is arranged on the support seat (2). The upper end of the connecting component is driven by the central slewing joint (10), and the lower end of the connecting component is driven by the slewing bearing (3).

2. The testing fixture for the central rotary joint of a wood clamp according to claim 1, characterized in that: The connecting assembly includes a first connecting assembly (5) and a second connecting assembly (6). The bottom of the support base (2) is fixed to the surface of the test bench (1) by multiple vertical support columns (20). A bearing support hole (21) for installing a slewing bearing (3) is provided in the center of the support base (2). The lower surface of the inner ring of the slewing bearing (3) is fixed to the surface of the support base (2) on the outer edge of the bearing support hole (21). It is located below the rear side of each central rotary joint (10) and on the inner ring of the slewing bearing (3). The first connecting component (5) is vertically arranged on the surface. The lower end of the first connecting component (5) is fixed on the upper surface of the inner ring of the slewing bearing (3). The fixed end of the central slewing joint (10) is fixed on the upper end of the first connecting component (5). A second connecting component (6) that drives the slewing bearing (3) is provided on the surface of the support seat (2) below the slewing end of each central slewing joint (10). A drive gear (40) that meshes with the slewing bearing (3) is provided on the output shaft of the hydraulic motor assembly (4).

3. The testing fixture for the central rotary joint of a wood clamp according to claim 2, characterized in that: The first connecting assembly (5) includes a lower fixing member (500), an upper fixing member (501), and a connecting post (502). The lower fixing member (500) is fixed on the inner ring of the slewing bearing (3). The lower end of the connecting post (502) is vertically fixed on the lower fixing member (501). The upper end of the upper fixing member (501) is horizontally fixed on the upper end of the connecting post (502). A positioning support plate (503) connected to the rear side of the central slewing joint (10) is horizontally provided on the surface of the upper fixing member (501). Along the fixed support plate (502)... 3) The central rotary joint (10) is vertically fixed at equal intervals along its edges; the second connecting assembly (6) includes a fixed sleeve (600), a connecting shaft (601), and a rotary gear (603). A recessed hole (604) coaxial with the fixed sleeve (600) is provided on the support base (2). A lower deep groove ball bearing (605) is provided in the recessed hole (604). The central axis of the connecting shaft (601) is on the same vertical line as the rotation center line of the central rotary joint (10). The lower deep groove ball bearing (605) is sleeved on the connecting shaft (601). On the lower outer wall of the connecting shaft (601), the upper end of the connecting shaft (601) is close to the rotating end of the central rotary joint (10). The upper outer end of the connecting shaft (601) is connected to the outer wall of the rotating end of the central rotary joint (10). A rotary gear (603) is sleeved on the outer wall of the connecting shaft 601 above the lower deep groove ball bearing (605). A U-shaped opening (600b) facing the lower deep groove ball bearing (605) is provided on the side of the rotary support (3) and along the lower outer wall of the fixed sleeve (600). The rotary gear (603) is along the... The U-shaped opening (600b) extends out and engages with the slewing bearing (3). An upper deep groove ball bearing (606) is fixedly sleeved on the connecting shaft (601) inside the upper end of the fixed sleeve (600). The outer ring of the upper deep groove ball bearing (606) is fixedly connected to the inner wall of the fixed sleeve (600). An annular support plate (600a) is provided on the lower outer peripheral wall of the fixed sleeve (600) along the rear side of the U-shaped opening (600b). The lower end of the fixed sleeve (600) is fixed on the support seat (2) by the annular support plate (600a).

4. The testing fixture for the central rotary joint of a wood clamp according to claim 3, characterized in that: An outwardly protruding limiting part (602) is provided on the outer wall of the connecting shaft (601) inside the fixed sleeve (600). An upper deep groove ball bearing (606) is sleeved on the connecting shaft (601) on the upper side of the limiting part (602). A lower connecting sleeve (607) is provided on the lower side of the limiting part (602) and fixed on the outer wall of the connecting shaft (601). The upper end of the lower connecting sleeve (607) contacts the lower side of the limiting part (602), and the lower end of the lower connecting sleeve (607) contacts the upper end of the rotary gear (603).

5. A testing fixture for a central rotary joint of a wood clamp according to claim 3 or 4, characterized in that: An upper connecting sleeve (608) is fitted on the connecting shaft (601) on the upper side of the upper deep groove ball bearing (606). The inner wall of the upper connecting sleeve (608) is fixedly connected to the keyway (601a) on the side wall of the connecting shaft (601) by a flat key (608a). The outer wall of the upper connecting sleeve (608) is connected to the outer wall of the rotating end of the central rotary joint (10) by an adjusting component (609).

6. A testing fixture for a central rotary joint of a wood clamp according to claim 3 or 4, characterized in that: A limiting fixing piece (610) is provided at the upper end of the connecting shaft (601). The limiting fixing piece (610) is fixed to the upper end of the connecting shaft (601) by a hexagonal bolt (611) along the axial direction. The lower side of the limiting fixing piece (610) is in contact with the upper end of the upper connecting sleeve (608).

7. The testing fixture for the central rotary joint of a wood clamp according to claim 5, characterized in that: The adjustment assembly (609) includes an adjustment sleeve (609a) and a transmission connector (609b). The side wall of the adjustment sleeve (609a) is provided with fixing holes (609c) of different heights. The adjustment sleeve (609a) is fixed to the outer peripheral wall of the upper connecting sleeve (608) by fixing bolts on the fixing holes (609c). The transmission connector (609b) is provided on the outer wall of the adjustment sleeve (609a) on the side opposite to the fixing holes (609c). The lower end of the transmission connector (609b) is fixed to the outer wall of the adjustment sleeve (609a). A limit pin (10a) is provided on the outer side wall of the rotating end of the central rotary joint (10). A locking space (609d) for receiving the limit pin (10a) is provided at the upper end of the transmission connector (609b).

8. A testing fixture for a central rotary joint of a wood clamp according to any one of claims 1-4, characterized in that: An oil port plug (10b) is provided at the bottom of the rotating end of the central rotary joint (10), and a pair of oil pipe adapters (10c) are provided at the top of the central rotary joint (10). The fixed end of the oil pipe adapter (10c) is connected to the oil inlet at the top of the central rotary joint (10) through a first direct head (10d), and the free end of the oil pipe adapter (10c) is connected to a right angle connector (10f) through a second direct head (10e).

9. The testing fixture for the central rotary joint of a wood clamp according to claim 8, characterized in that: Oil supply pipe (7), return pipe (7a), and oil distribution block (8) are respectively provided on the front and rear sides of the test bench (2). The main oil supply pipe (7) and return pipe (7a) are respectively connected to the hydraulic pump through the solenoid valve assembly (9). The first oil outlet of the solenoid valve assembly (9) is connected to the oil inlet of the hydraulic motor assembly (4) through the first branch oil supply pipe. The return port of the hydraulic motor assembly (4) is connected to the first return port of the solenoid valve assembly (9) through the first return branch pipe. The second oil outlet of the solenoid valve assembly (9) is connected to the oil distribution block (8) through the second branch oil supply pipe. The oil inlet is connected, and each oil outlet of the oil distribution block (8) is connected to the oil inlet of the central adapter (10) through an oil supply branch pipe. The oil outlet of the central adapter (10) is connected to the oil return inlet of the oil distribution block (8) through a return branch pipe. The oil return outlet of the oil distribution block (8) is connected to the second oil return port of the solenoid valve group (9) through a second return branch pipe. The oil return outlet of the solenoid valve (9) is connected to the oil return port of the hydraulic pump (12) through a return main pipe (7a). The oil distribution block (8) is fixed on the test bench (2) by an oil block fixing bracket (80).

10. A test method for the central rotary joint of a wood clamp, characterized in that: The testing method using the central rotary joint testing fixture for a wood clamp according to any one of claims 1-9 includes the following steps: Step 1: Fix the central rotary joint (10) at intervals along the edge of the positioning support plate (503) at the upper end of the first connecting component (5), and adjust the height of the adjusting component (609) at the upper end of the second connecting component (6) so that the limiting pin (10a) provided on the outer side wall of the rotary end of each central rotary joint (10) is placed in the locking space (609d) of the transmission connector (609b); Step 2: Connect the branch oil supply and branch oil return pipes to the central rotary joint (10) so that the oil supply end and oil return end of the central rotary joint (10) are connected to the oil tank through the hydraulic pump via the corresponding solenoid valve group (9); Step 3: Adjust the hydraulic pump pressure to meet the test pressure value, start the hydraulic pump, and the hydraulic pump sends the hydraulic oil in the oil tank to the solenoid valve group (9) through the oil supply main pipe. The high pressure hydraulic oil discharged from the first oil outlet of the solenoid valve group (9) is sent to the hydraulic motor assembly (4) through the first branch oil supply pipe. During the forward and reverse rotation of the hydraulic motor assembly (4), the rotating end of the central rotary joint (10) rotates together in the forward and reverse directions. Step 4: Start the solenoid valve assembly (9) so that the solenoid valve assembly (9) supplies oil to each central adapter (10) through the oil distribution block (8). During the rotation of the rotating end of the central adapter (10), various parameter tests are performed on the central adapter (10). The hydraulic oil discharged from the oil outlet of the central adapter (10) flows back to the oil tank through the oil distribution block (8), the solenoid valve assembly (9), and the hydraulic pump in sequence. Step 5: After the hydraulic oil flows back to the oil tank, disconnect the oil supply and return pipes of the central rotary joint (10) currently being tested and inspected. Then, remove the upper end of the central rotary joint (10) from the edge of the positioning support plate (503) at the upper end of the first connecting component (5), so that the limiting pin (10a) on the outer side wall of the rotary end of the central rotary joint (10) leaves the locking space (609d) at the upper end of the transmission connector (609b). The test and inspection of the central rotary joint (10) is completed.

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