CN109130730B - Hydraulic tractor assembly with adjustable axis position - Google Patents
Hydraulic tractor assembly with adjustable axis position Download PDFInfo
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- CN109130730B CN109130730B CN201811250702.XA CN201811250702A CN109130730B CN 109130730 B CN109130730 B CN 109130730B CN 201811250702 A CN201811250702 A CN 201811250702A CN 109130730 B CN109130730 B CN 109130730B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60D—VEHICLE CONNECTIONS
- B60D1/00—Traction couplings; Hitches; Draw-gear; Towing devices
- B60D1/24—Traction couplings; Hitches; Draw-gear; Towing devices characterised by arrangements for particular functions
- B60D1/42—Traction couplings; Hitches; Draw-gear; Towing devices characterised by arrangements for particular functions for being adjustable
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Abstract
The invention relates to a hydraulic type tractor assembly with an adjustable axis position, which comprises a traction disc, a rotating shaft, a base, supporting legs and a piston assembly, wherein the rotating shaft is arranged on the traction disc; the traction disc is rotationally connected with the base through a rotating shaft; the base comprises a base body and two supports arranged on the base body; a piston assembly is fixed in each support; each piston assembly is sleeved with a support leg, and the support leg is connected with the support in a sliding manner; each support leg is rotatably connected with one rotating shaft. According to the technical scheme, the base, the support legs and the piston assembly structure are adopted, when the load of the tractor changes, the support legs are driven to move through the movement of the hydraulic cavity, and self-adaptive adjustment of the tractor assembly is achieved.
Description
Technical Field
The invention belongs to a whole vehicle system, and particularly relates to a hydraulic type tractor assembly with an adjustable axis position.
Background
The tractor is connected with the trailer through a tractor assembly, and the trailer distributes the load on the tractor along the axle center position of the tractor. The position of the tractor axle determines the axle load distribution of each axle of the tractor chassis.
As shown in fig. 1, the conventional tractor structure includes a traction disc 01 (including a traction locking mechanism and an unlocking mechanism inside), a support 03 and a rotating shaft 02, and when the axle center position of the tractor on the whole vehicle needs to be adjusted, usually, only hole sites are additionally reserved on a mounting bracket below the tractor, and the axle center position of the tractor can be adjusted by selecting different hole sites, as shown in fig. 2 and 3.
Disclosure of Invention
The invention aims to provide a hydraulic tractor assembly with an adjustable axis position, which aims to solve the problem that the axis of the tractor used by the existing tractor cannot be adjusted in a self-adaptive manner through the tractor assembly.
The invention is realized by the following technical scheme:
a hydraulic tractor assembly with an adjustable axis position comprises a traction disc, a rotating shaft, a base, supporting legs and a piston assembly;
the traction disc is rotatably connected with the base through a rotating shaft;
the base comprises a base body and two supports arranged on the base body;
a piston assembly is fixed in each support; each piston assembly is sleeved with a support leg, and the support leg is connected with the support in a sliding manner;
each support leg is rotatably connected with one rotating shaft.
The support is provided with a rectangular groove with an opening at the top, and the inner side surfaces of two long side edges of the rectangular groove are respectively provided with a guide sliding groove;
and a first oil way and a second oil way are arranged in two short side edges of the rectangular groove and are communicated with the rectangular groove.
The piston assembly comprises a piston rod and a piston, and the piston is fixed on the piston rod;
a first mounting seat is arranged at one end of the piston rod, and a second mounting seat is arranged at the other end of the piston rod;
a first built-in oil way and a first built-in oil way hole are formed in the piston rod between the first mounting seat and the piston, and the first built-in oil way hole is communicated with the first built-in oil way;
a second built-in oil way and a second built-in oil way hole are formed in the piston rod between the second mounting seat and the piston, and the second built-in oil way hole is communicated with the second built-in oil way;
and a sealing ring groove is formed in the side wall of the piston, and a sealing ring is arranged in the sealing ring groove.
The support leg comprises a support leg body, an end cover sealing gasket and an end cover sealing ring;
the two ends of the support leg body are respectively and sequentially provided with an end cover sealing gasket and an end cover; the end cover sealing ring is arranged on the end cover;
the support leg body comprises a tractor rotating shaft mounting part and a hydraulic cavity part, a rotating shaft hole is formed in the tractor rotating shaft mounting part, and a hydraulic cavity is formed in the hydraulic cavity part; the piston assembly penetrates through the hydraulic cavity, and the hydraulic cavity moves back and forth along the piston rod;
the tractor rotating shaft mounting part and the hydraulic cavity part are connected into an integral structure through a connecting part; opposite support leg sliding blocks are axially arranged on the outer side of the hydraulic cavity part;
and end cover mounting holes are formed in two ends of the hydraulic cavity part and used for fixing the end covers.
The end cover comprises an end cover body and two limiting stop rods, a through hole is formed in the center of the end cover body, a sealing ring mounting groove is formed in the inner side wall of the through hole, and the end cover sealing ring is arranged in the sealing ring mounting groove;
the outer side of the end cover body is provided with an end cover mounting bolt hole, and the two limiting stop levers are fixed on the end cover body.
The overflow valve comprises a valve body, a valve core, a pressure spring and a pressure adjusting bolt; the valve core and the pressure spring are both arranged in the valve body;
an oil inlet passage, an oil outlet passage and an overflow passage are arranged in the valve body; the oil inlet passage forms an oil inlet on the outer side surface of the valve body; the oil outlet passage forms an oil outlet at the outer side of the valve body; the overflow passage forms an overflow port on the valve body;
the overflow passage is communicated with the oil inlet passage through a valve core slide passage; the overflow passage penetrates through the upper surface of the valve body upwards, an internal thread is arranged at the upper end of the overflow passage, and the pressure adjusting bolt is in threaded connection with the internal thread;
the valve core and the pressure spring are both arranged in the overflow passage.
The hydraulic control system also comprises an electric liquid pump, an electromagnetic directional valve, a hydraulic oil tank and a pipeline; the electric liquid pump, the electromagnetic directional valve and the hydraulic oil tank are all arranged on the base body;
an oil outlet of the hydraulic oil tank is connected with an oil inlet of the electric liquid pump through a pipeline, and an oil return port of the hydraulic oil tank is respectively connected with an overflow port of an overflow valve and a fourth pipeline of the electromagnetic directional valve through pipelines;
an oil outlet of the electric liquid pump is connected with an oil inlet of the overflow valve through a pipeline; an oil outlet of the overflow valve is connected with a second passage of the electromagnetic directional valve through a pipeline;
the first oil way is connected with a first passage of the electromagnetic directional valve through a pipeline, and the second oil way is connected with a third passage of the electromagnetic directional valve through a pipeline.
The position sensor is arranged in the guide sliding groove and comprises an upper resistor and a lower resistor, and the upper resistor and the lower resistor are connected with the line socket through wires.
The invention has the beneficial effects that:
according to the technical scheme, the base, the support legs and the piston assembly structure are adopted, when the load of the tractor changes, the support legs are driven to move through the movement of the hydraulic cavity, and self-adaptive adjustment of the tractor assembly is achieved.
Drawings
FIG. 1 is a schematic view of a prior art retractor;
FIG. 2 is a schematic view of the tractor and tractor mounted;
FIG. 3 is a schematic view of the tractor and the towing vehicle in another position;
FIG. 4 is a schematic view of a retractor assembly of the present invention;
FIG. 5 is a schematic view of the retractor assembly with the traction disk removed;
FIG. 6 is a hydraulic schematic of the tractor assembly;
FIG. 7 is a schematic view of a piston assembly;
FIG. 8 is a schematic view of a stand-off structure;
FIG. 9 is a schematic view of the piston assembly and the support assembly;
FIG. 10 is a partial cross-sectional view of the piston assembly and mount mounting;
FIG. 11 is a schematic view of a support leg structure;
FIG. 12 is a schematic view of the connection and engagement of the piston assembly with the legs;
FIG. 13 is a schematic view of the operation of the legs moving along the piston assembly;
FIG. 14 is a schematic diagram of an electric hydraulic pump;
FIG. 15 is a schematic view of a hydraulic oil tank;
FIG. 16 is a schematic structural view of a solenoid directional valve;
FIG. 17 is a schematic structural view of a relief valve;
FIG. 18 is a schematic view of a position sensor installation fit;
fig. 19 is a schematic diagram of the working principle of the position sensor.
Description of the reference numerals
01 traction disc, 02 rotating shaft, 03 support, 100 traction disc, 200 rotating shaft, 300 base, 301 base body, 302 support, 303 first oil way, 304 second oil way, 305 guide chute, 400 piston assembly, 401 piston rod, 402 piston, 403 first mounting seat, 404 second mounting seat, 405 first built-in oil way, 406 first built-in oil way hole, 407 second built-in oil way hole, 408 sealing ring, 409 second built-in oil way, 500 support leg, 501 tractor rotating shaft mounting part, 502 hydraulic cavity part, 503 connecting part, 504 support leg sliding block, 505 end cover sealing gasket, 506 fixing bolt, 507 end cover, 508 end cover sealing ring, 600 electric liquid pump, 601 mounting seat, 602 electric liquid pump oil inlet, 603 electric liquid pump oil outlet, 700 overflow valve, 701 pressure adjusting bolt, 702 oil inlet, 703 an oil outlet, 704 an overflow port, 800 an electromagnetic directional valve, a T first passage, an A second passage, a P third passage, a B fourth passage, a 900 hydraulic oil tank, an oil outlet of a 901 hydraulic oil tank, an oil return port of a 902 hydraulic oil tank, a 1001 upper resistor, a 1002 lower resistor and a 1003 line plug socket.
Detailed Description
The technical solutions of the present invention are described in detail below by examples, and the following examples are only exemplary and can be used only for explaining and illustrating the technical solutions of the present invention, but not construed as limiting the technical solutions of the present invention.
The present application provides a hydraulic type axial center position adjustable retractor assembly, as shown in fig. 4 and 5, comprising a retractor disc 100, a rotating shaft 200, a base 300, a leg 500 and a piston assembly 400; the traction disc and the rotating shaft are the same as the prior art, are not the technical scheme claimed by the application, and are not described in detail here.
The traction disc is rotationally connected with the base through a rotating shaft; in the application, the device comprises two rotating shafts which are both rotationally connected with the traction disc.
The base 300 comprises a base body 301 and two supports 302 arranged on the base body; the two supports have the same structure.
A piston assembly is fixed in each support; each piston assembly is sleeved with a support leg, and the support legs are connected with the support in a sliding mode.
Each support leg is rotatably connected with one rotating shaft.
The support 302 is provided with a rectangular groove with an open top, and the inner side surfaces of two long sides of the rectangular groove are respectively provided with a guide chute 305; a position sensor is arranged in the guide chute of one of the supports.
A first oil passage 303 and a second oil passage 304 are provided in both short side edges of the rectangular groove and are both communicated with the rectangular groove.
The piston assembly 400 comprises a piston rod 401 and a piston 402, wherein the piston is fixed on the piston rod;
a first mounting seat 403 is arranged at one end of the piston rod, and a second mounting seat 404 is arranged at the other end of the piston rod; and mounting holes are formed in the first mounting seat and the second mounting seat and are used for being fixedly connected with the support through fixing bolts.
A first built-in oil passage 405 and a first built-in oil passage hole 406 are provided in the piston rod between the first mount base and the piston, and the first built-in oil passage hole communicates with the first built-in oil passage.
A second built-in oil passage 409 and a second built-in oil passage hole 407 are provided in the piston rod between the second mount and the piston, the second built-in oil passage hole communicates with the second built-in oil passage, and the first built-in oil passage does not communicate with the second built-in oil passage.
A seal groove is provided in the side wall of the piston, and a seal 408 is provided in the seal groove.
The present application provides a support leg 500, which comprises a support leg body, an end cover 507, an end cover gasket 505 and an end cover sealing ring 508.
The two ends of the support leg body are respectively and sequentially provided with an end cover sealing gasket and an end cover; the end cover sealing ring is arranged on the end cover.
The supporting leg body comprises a retractor rotating shaft mounting part 501 and a hydraulic cavity part 502, a retractor rotating shaft hole is formed in the retractor rotating shaft mounting part, and a hydraulic cavity is formed in the hydraulic cavity part. The axial central line of the tractor rotating shaft hole is vertical to the axial central line of the hydraulic cavity.
The retractor rotating shaft mounting part and the hydraulic cavity part are connected into an integral structure through a connecting part 503; opposite leg sliders 504 are axially disposed outside the hydraulic chamber portion. The connecting line of the upper and lower midpoints of the two sliders is positioned above the axial center line of the hydraulic cavity. A plurality of lightening holes are arranged on the connecting part.
And end cover mounting holes are formed in two ends of the hydraulic cavity part and used for fixing the end covers and the end cover sealing gaskets on the hydraulic cavity part through fixing bolts.
The end cover 507 comprises an end cover body and two limiting stop levers, a through hole is formed in the center of the end cover body, a sealing ring mounting groove is formed in the inner side wall of the through hole, and an end cover sealing ring is arranged in the sealing ring mounting groove.
The outer side of the end cover body is provided with end cover mounting bolt holes which are in one-to-one correspondence with the end cover mounting holes, and the two limiting stop levers are fixed on the end cover body.
The tractor rotating shaft mounting part and the hydraulic cavity part are connected into an integral structure through a connecting part; the outer side of the hydraulic cavity part is axially provided with opposite supporting foot sliding blocks; the leg slider 504 slides within the guide slot 305.
And end cover mounting holes are formed in two ends of the hydraulic cavity part and used for fixing the end covers.
The end cover comprises an end cover body and two limiting stop rods, a through hole is formed in the center of the end cover body, a sealing ring mounting groove is formed in the inner side wall of the through hole, and an end cover sealing ring is arranged in the sealing ring mounting groove; the piston rod passes through the sealing ring.
An end cover mounting bolt hole is formed in the outer side of the end cover body, the two limiting stop rods are fixed on the end cover body, and the fixing bolt penetrates through the end cover mounting bolt hole and then is in threaded connection with the end cover mounting hole.
The working principle of the cooperation of the support legs and the piston assembly is that the piston assembly does not move relatively after being fixed with the support, and the support legs move relatively along the piston assembly according to the real-time state of hydraulic oil in the hydraulic cavity.
When hydraulic oil in the built-in oil passages of the piston assembly and the support flows in the direction shown in fig. 13, the support legs move towards the left side, otherwise, the support legs move towards the right side, when the support legs move left and right, the limiting rods arranged on the end covers contact with the piston of the piston assembly, the maximum movement stroke is achieved, and meanwhile, the limiting stop rods can prevent the built-in oil passage holes of the piston from being blocked by the end covers to enable the whole oil passage to be blocked.
The application provides an overflow valve 700, which comprises a valve body, a valve core, a pressure spring and a pressure adjusting bolt 701; the valve core and the pressure spring are both arranged in the valve body.
An oil inlet passage, an oil outlet passage and an overflow passage are arranged in the valve body; the oil inlet passage forms an oil inlet 702 on the outer side surface of the valve body; the oil outlet passage forms an oil outlet 703 at the outer side of the valve body; the relief passage forms a relief port 704 in the valve body.
The overflow passage is communicated with the oil inlet passage through a valve core slide passage; the overflow passage upwards penetrates through the upper surface of the valve body, an internal thread is arranged at the upper end of the overflow passage, and the pressure adjusting bolt is in threaded connection with the internal thread; the overflow passage is parallel to the oil inlet passage, the overflow port and the oil inlet are positioned on the same side of the valve body, and the oil outlet is positioned on one side of the valve body opposite to the oil inlet.
The valve core and the pressure spring are arranged in the overflow passage, when the pressure in the oil inlet passage does not exceed the set pressure, the valve core blocks the communication between the overflow passage and the valve core slide passage under the action of the pressure spring, when the oil pressure in the oil inlet passage is greater than the set pressure, the oil pressure acts on the surface of the front end of the valve core, and when the force pushing the valve core upwards overcomes the force of the pressure spring, the valve core moves upwards along the valve core slide passage, so that the oil inlet passage is communicated with the overflow passage through the valve core slide passage, part of hydraulic oil enters the overflow passage, and the oil pressure of the oil outlet passage is ensured to be stable.
The pipe diameter of the oil inlet passage is the same as that of the oil outlet passage. The axial center line of the oil inlet passage is superposed with the axial center line of the oil outlet passage. The axial center line of the overflow passage is perpendicular to the axial center line of the oil inlet passage. Such structure guarantees that the flow of hydraulic oil in oil feed passageway and the passageway that produces oil can not arouse the change of velocity of flow because of the change of direction, guarantees the stability of oil pressure.
The valve body is provided with a mounting seat, and the mounting seat is provided with a mounting hole.
The valve core comprises a valve core body, a conical part is arranged at the front end of the valve core body, an extending part is arranged at the rear end of the valve core body, the diameter of the extending part is larger than that of the valve core body, and a pressure spring limiting rod is arranged on the extending part.
When the oil pressure of the oil inlet is lower than the overflow pressure set by the overflow pressure spring, the valve core is pressed on the valve body under the action of the spring and is tightly attached to the corresponding contact surface of the valve body, so that the oil is prevented from overflowing, and the hydraulic oil can only flow out of the outlet; when the oil pressure of the oil inlet is higher than the overflow pressure set by the overflow pressure spring, the valve core is pushed by the hydraulic oil to move (when the force of the valve core pushing the spring is equal to the elastic force of the spring, the valve core stops moving), and the stroke clearance is formed between the valve core and the valve body, so that part of the hydraulic oil overflows from the overflow port and flows back to the oil tank, and the pressure of the oil path of the system is effectively controlled.
The tractor assembly also comprises an electric liquid pump 600, an electromagnetic directional valve 800, a hydraulic oil tank 900 and pipelines; the electric liquid pump, the electromagnetic directional valve and the hydraulic oil tank are all arranged on the base body;
an oil outlet 901 of the hydraulic oil tank is connected with an oil inlet 602 of the electric liquid pump through a pipeline, and an oil return port 902 of the hydraulic oil tank is respectively connected with an overflow port 704 of the overflow valve and a fourth passage B of the electromagnetic directional valve through pipelines;
an oil outlet 603 of the electric liquid pump is connected with an oil inlet 702 of the overflow valve through a pipeline; an oil outlet 703 of the overflow valve is connected with a second passage A of the electromagnetic directional valve through a pipeline;
the first oil passage 303 is connected to a first passage T of the electromagnetic directional valve via a pipeline, and the second oil passage 304 is connected to a third passage P of the electromagnetic directional valve via a pipeline.
The electromagnetic directional valve is a three-position four-way electromagnetic directional valve and comprises a first passage T, a second passage A, a third passage P and a fourth passage B, when the directional valve is in a middle position, oil passages of four valve ports of a TAPB are not communicated, and support legs do not move relatively; when the reversing valve is in the left position, the oil passages of the two valve ports AP are communicated, the oil passages of the two valve ports TB are communicated through the built-in oil passage of the valve core, and the support legs move to one side relative to the piston; when the reversing valve is in the right position, the oil passages of the two valve ports of the TA are communicated, the oil passages of the two valve ports of the PB are communicated, and the support legs move towards the other side relative to the piston. When the pump oil pressure of the electric pump is larger than the overflow pressure set by the overflow valve, the overflow valve plays an overflow function, so that part of hydraulic oil overflows from the overflow port and flows back to the oil tank, and the pressure of the oil path of the system is effectively controlled.
The position sensor is arranged in the guide chute 305 and comprises an upper resistor 1001 and a lower resistor 1002, and the upper resistor and the lower resistor are connected with the line socket 1003 through wires. In this embodiment, the position sensor is disposed in the guiding slot in the left support, and the total length of the upper and lower resistors of the position sensor is set according to the axial adjustment range of the tractor assembly. When the supporting foot sliding block slides in the guide sliding groove of the support, the length of the upper and lower resistor strips connected with the sensor circuit part is correspondingly changed, so that the resistance value of the circuit is correspondingly changed, and the position of the supporting foot can be correspondingly measured.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A hydraulic type tractor assembly with an adjustable axis position is characterized by comprising a traction disc, a rotating shaft, a base, support legs and a piston assembly;
the traction disc is rotatably connected with the base through a rotating shaft;
the base comprises a base body and two supports arranged on the base body;
a piston assembly is fixed in each support; each piston assembly is sleeved with a support leg, and the support leg is connected with the support in a sliding manner;
each support leg is rotatably connected with one rotating shaft;
the piston assembly comprises a piston rod and a piston, and the piston is fixed on the piston rod;
a first mounting seat is arranged at one end of the piston rod, and a second mounting seat is arranged at the other end of the piston rod;
a first built-in oil way and a first built-in oil way hole are formed in the piston rod between the first mounting seat and the piston, and the first built-in oil way hole is communicated with the first built-in oil way;
a second built-in oil way and a second built-in oil way hole are formed in the piston rod between the second mounting seat and the piston, and the second built-in oil way hole is communicated with the second built-in oil way;
the support leg comprises a support leg body, an end cover sealing gasket and an end cover sealing ring;
the two ends of the support leg body are respectively and sequentially provided with an end cover sealing gasket and an end cover; the end cover sealing ring is arranged on the end cover;
the support leg body comprises a tractor rotating shaft mounting part and a hydraulic cavity part, a rotating shaft hole is formed in the tractor rotating shaft mounting part, and a hydraulic cavity is formed in the hydraulic cavity part; the piston assembly passes through the hydraulic chamber, and the hydraulic chamber reciprocates along the piston rod.
2. The hydraulic adjustable axial center tractor assembly according to claim 1, wherein said support has a rectangular groove with an open top, and guide grooves are respectively disposed on the inner side surfaces of two long sides of said rectangular groove;
and a first oil way and a second oil way are arranged in two short side edges of the rectangular groove and are communicated with the rectangular groove.
3. The hydraulically operated retractor assembly with adjustable axial center position as defined in claim 1,
and a sealing ring groove is formed in the side wall of the piston, and a sealing ring is arranged in the sealing ring groove.
4. The hydraulically operated retractor assembly with adjustable axial center position as defined in claim 1,
the tractor rotating shaft mounting part and the hydraulic cavity part are connected into an integral structure through a connecting part; opposite support leg sliding blocks are axially arranged on the outer side of the hydraulic cavity part;
and end cover mounting holes are formed in two ends of the hydraulic cavity part and used for fixing the end covers.
5. The hydraulic tractor assembly with the adjustable axial center according to claim 4, wherein the end cap includes an end cap body and two limit stop rods, a through hole is formed in the center of the end cap body, a seal ring mounting groove is formed in the inner side wall of the through hole, and the end cap seal ring is disposed in the seal ring mounting groove;
the outer side of the end cover body is provided with an end cover mounting bolt hole, and the two limiting stop levers are fixed on the end cover body.
6. The hydraulic adjustable axial center tractor assembly according to claim 2, comprising an overflow valve, wherein the overflow valve comprises a valve body, a valve core, a pressure spring and a pressure adjusting bolt; the valve core and the pressure spring are both arranged in the valve body;
an oil inlet passage, an oil outlet passage and an overflow passage are arranged in the valve body; the oil inlet passage forms an oil inlet on the outer side surface of the valve body; the oil outlet passage forms an oil outlet at the outer side of the valve body; the overflow passage forms an overflow port on the valve body;
the overflow passage is communicated with the oil inlet passage through a valve core slide passage; the overflow passage penetrates through the upper surface of the valve body upwards, an internal thread is arranged at the upper end of the overflow passage, and the pressure adjusting bolt is in threaded connection with the internal thread;
the valve core and the pressure spring are both arranged in the overflow passage.
7. The hydraulic adjustable axial center tractor assembly according to claim 6, further comprising an electric liquid pump, an electromagnetic directional valve, a hydraulic oil tank and a pipeline; the electric liquid pump, the electromagnetic directional valve and the hydraulic oil tank are all arranged on the base body;
an oil outlet of the hydraulic oil tank is connected with an oil inlet of the electric liquid pump through a pipeline, and an oil return port of the hydraulic oil tank is respectively connected with an overflow port of an overflow valve and a fourth pipeline of the electromagnetic directional valve through pipelines;
an oil outlet of the electric liquid pump is connected with an oil inlet of the overflow valve through a pipeline; an oil outlet of the overflow valve is connected with a second passage of the electromagnetic directional valve through a pipeline;
the first oil way is connected with a first passage of the electromagnetic directional valve through a pipeline, and the second oil way is connected with a third passage of the electromagnetic directional valve through a pipeline.
8. The hydraulic adjustable axial center retractor assembly according to claim 2, further comprising a position sensor disposed in the sliding guide slot, and including an upper resistor and a lower resistor, wherein the upper resistor and the lower resistor are connected to the line socket via wires.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811250702.XA CN109130730B (en) | 2018-10-25 | 2018-10-25 | Hydraulic tractor assembly with adjustable axis position |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811250702.XA CN109130730B (en) | 2018-10-25 | 2018-10-25 | Hydraulic tractor assembly with adjustable axis position |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109130730A CN109130730A (en) | 2019-01-04 |
| CN109130730B true CN109130730B (en) | 2020-05-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811250702.XA Active CN109130730B (en) | 2018-10-25 | 2018-10-25 | Hydraulic tractor assembly with adjustable axis position |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3850449A (en) * | 1973-03-19 | 1974-11-26 | J Link | Antijackknifing device |
| US3843159A (en) * | 1973-10-19 | 1974-10-22 | Amsted Ind Inc | Fifth wheel slider support |
| US4729575A (en) * | 1986-02-14 | 1988-03-08 | Eggen Marvin P | Compensated trailer hitch |
| DE102004045662B4 (en) * | 2004-09-18 | 2008-10-30 | Jost-Werke Gmbh | Adjustment device, control device and device for reducing the air resistance of a semitrailer |
| CN101163621A (en) * | 2005-03-09 | 2008-04-16 | 萨福霍兰公司 | Fifth wheel slider assembly |
| DE102005060124B4 (en) * | 2005-12-16 | 2011-05-05 | Jost-Werke Gmbh | Displacement device for a fifth wheel arranged on a towing vehicle |
| CN102493969B (en) * | 2011-12-19 | 2014-10-08 | 宁波千普机械制造有限公司 | Hydraulic cylinder with double piston rods |
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2018
- 2018-10-25 CN CN201811250702.XA patent/CN109130730B/en active Active
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Address after: 230601 No. 99 Ziyun Road, Hefei Economic and Technological Development Zone, Anhui Province Applicant after: Anhui Jianghuai Automobile Group Limited by Share Ltd Address before: 230601 No. 669 Shixin Road, Taohua Industrial Park, Hefei City, Anhui Province Applicant before: Anhui Jianghuai Automobile Group Limited by Share Ltd |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |