CN113002627B - Shock attenuation girder - Google Patents

Shock attenuation girder Download PDF

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Publication number
CN113002627B
CN113002627B CN202011480056.3A CN202011480056A CN113002627B CN 113002627 B CN113002627 B CN 113002627B CN 202011480056 A CN202011480056 A CN 202011480056A CN 113002627 B CN113002627 B CN 113002627B
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Prior art keywords
frame
beam frame
auxiliary beam
vertical baffle
flat
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CN202011480056.3A
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Chinese (zh)
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CN113002627A (en
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卞金超
韦自利
侯磊
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Jiangsu Defa Rv Technology Co ltd
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Jiangsu Defa Rv Technology Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
    • B62D21/18—Understructures, i.e. chassis frame on which a vehicle body may be mounted characterised by the vehicle type and not provided for in groups B62D21/02 - B62D21/17
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
    • F16F15/08—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with rubber springs ; with springs made of rubber and metal

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Body Structure For Vehicles (AREA)
  • Vibration Prevention Devices (AREA)

Abstract

The invention relates to a recreational vehicle part, in particular to a damping crossbeam which comprises a main beam frame (1) and an auxiliary beam frame (2); the method is characterized in that: the lock is characterized by also comprising a DT damper (3), a damper fastening nut (4), a lockrand (5) and a pressure spring (6); the auxiliary beam frame (2) is arranged in the main beam frame (1), the auxiliary beam frame (2) is arranged on the upper side, and the main beam frame (1) is arranged on the lower side; a DT damper (3) and a pressure spring (6) are arranged between the auxiliary beam frame (2) and the main beam frame (1); the DT damper (3) and the pressure spring (6) are used for buffering the vibration generated by up-and-down bumping when the motor home runs, so that the aim of shock absorption is fulfilled; the beneficial effects are that: the vibration of the motor home during running can be reduced, and the damping problem of the motor home is solved; the comfort of people in the caravan is improved; the safety and popularization of the motor home can be positively influenced, and very beneficial effects are brought to individuals, families and the society.

Description

Shock attenuation girder
Technical Field
The invention relates to a caravan component, in particular to a damping crossbeam.
Background
The touring car is driven to travel to the world, the touring car becomes a life style of more and more people, and the demand of people for purchasing the touring car is increased along with the improvement of the living standard of people, so that the comfort of the touring car is also important for touring car users and popularization; whether the road is flat or not, the vehicle always generates vibration when running, so that the shock absorption of the motor home is an important problem and a problem which is very concerned by a motor home traveler, and the study on the shock absorption of the motor home is a very meaningful work.
Disclosure of Invention
The invention provides a damping crossbeam which can reduce the vibration of a caravan during running and solve the damping problem of the caravan. The technical scheme for solving the technical problem is as follows: the method comprises the following steps that a vibration buffering structure is designed on a crossbeam of the motor home, namely, the crossbeam of the motor home is designed into two parts, and one part is a main beam frame; one part is a secondary beam frame, the secondary beam frame is arranged on the main beam frame, and a damping buffer device is arranged between the main beam frame and the secondary beam frame from top to bottom, so that the problem of inertia of the motor home is solved.
The invention comprises a main beam frame (1) and an auxiliary beam frame (2); the method is characterized in that: the novel steel wire rope further comprises a DT damper (3), a damper fastening nut (4), a serging (5) and a pressure spring (6), wherein the auxiliary beam frame (2) is arranged in the main beam frame (1), the auxiliary beam frame (2) is arranged on the upper side, and the main beam frame (1) is arranged on the lower side; a DT damper (3) and a pressure spring (6) are arranged between the auxiliary beam frame (2) and the main beam frame (1); the DT damper (3) consists of rubber bubbles (3-1), soft colloid (3-2) and mounting bolts (3-3); one end of the DT damper (3) is a hemispheroid, and the other end of the DT damper is a bolt; the outer layer of the hemisphere is a rubber bubble (3-1), the inner layer of the hemisphere is a soft colloid (3-2), and the right side of the soft colloid (3-2) is provided with a base for mounting a bolt (3-3); the right end of the base of the mounting bolt (3-3) is wrapped in the rubber bubble (3-1) by the rubber bubble (3-1); the rubber bubble (3-1) is a soft body made of synthetic rubber, and has certain extension performance, shape recovery performance and certain fatigue resistance performance; the soft rubber body (3-2) is made of TPE materials, the DT dampers (3) and the pressure springs (6) are used for buffering vibration generated by up-and-down bumping when the motor home runs, and the purpose of shock absorption is achieved, and the main beam frame (1) is composed of a transverse supporting frame (1-1), a vertical frame (1-2), an X fixing frame (1-3) and a traction frame (1-4); an X-shaped X fixing frame (1-3) is arranged in the middle; the four sides of the X fixing frame (1-3) are provided with transverse supporting frames (1-1), and the middle of each transverse supporting frame (1-1) is provided with a damper mounting hole B (1-5); the upper end of the outer edge of the transverse supporting frame (1-1) is provided with a vertical frame (1-2); the lower end of the vertical frame (1-2) is vertically connected with the horizontal supporting frame (1-1); the left ends of the transverse supporting frame (1-1) and the vertical frame (1-2) on the left side of the X fixing frame (1-3) are provided with traction frames (1-4), and the traction frames (1-4) and the vertical frame (1-2) form a triangular structure.
The auxiliary beam frame (2) consists of an angle drawing frame A (2-1), an angle drawing frame B (2-2), an angle drawing frame C (2-3), an angle drawing frame D (2-4), a right vertical baffle edge A (2-5), a right vertical baffle edge B (2-6), a right vertical baffle edge C (2-7), a right vertical baffle edge D (2-8), a left vertical baffle edge A (2-9), a left vertical baffle edge B (2-10), a left vertical baffle edge C (2-11), a left vertical baffle edge D (2-12) and a flat plate four-side frame (2-13); the method is characterized in that: the upper side and the right side of the flat plate four-side frame (2-13) are provided with angle pulling frames A (2-1); the right side and the lower side of the flat plate four-side frame (2-13) are provided with angle pulling frames B (2-2); the lower side and the left side of the flat plate four-side frame (2-13) are provided with angle pulling frames C (2-3); the left side and the upper side of the flat plate four-side frame (2-13) are provided with angle pulling frames D (2-4); the flat plate four-side frame (2-13), the angle pulling frame A (2-1), the angle pulling frame B (2-2), the angle pulling frame C (2-3) and the angle pulling frame D (2-4) form a fixed structure, so that the flat plate four-side frame is firm and does not deform, and a solid condition is established for integral shock absorption; the right part of the upper side in the flat plate four-side frame (2-13) is provided with a right vertical flange A (2-5); the upper part of the right side in the flat plate four-side frame (2-13) is provided with a right vertical flange B (2-6); the lower part of the right side in the flat plate four-side frame (2-13) is provided with a right vertical baffle edge C (2-7); the right part of the lower side in the flat plate four-side frame (2-13) is provided with a right vertical flange D (2-8); the left part of the lower side in the flat plate four-side frame (2-13) is provided with a left vertical flange A (2-9); the lower part of the left side in the flat plate four-side frame (2-13) is provided with a left vertical flange B (2-10); the upper part of the left side in the flat plate four-side frame (2-13) is provided with a left vertical baffle edge C (2-11); a left vertical baffle D (2-12) is arranged at the left part of the upper side in the flat plate four-side frame (2-13); damper mounting holes A (2-14) are formed in the four flat frames (2-13).
The DT damper (3) consists of rubber bubbles (3-1), soft colloid (3-2) and mounting bolts (3-3);
the method is characterized in that: one end of the DT damper (3) is a hemispheroid, and the other end of the DT damper is a bolt; the outer layer of the hemisphere is a rubber bubble (3-1), the inner layer of the hemisphere is a soft colloid (3-2), and the right side of the soft colloid (3-2) is provided with a base for mounting a bolt (3-3); the right end of the base of the mounting bolt (3-3) is wrapped in the rubber bubble (3-1) by the rubber bubble (3-1);
the rubber bubble (3-1) is a soft body made of synthetic rubber, and has certain extension performance, shape recovery performance and certain fatigue resistance performance; the soft colloid (3-2) is a TPE material.
The invention has the beneficial effects that: the vibration of the motor home during running can be reduced, and the damping problem of the motor home is solved; the comfort of people in the caravan is improved; the safety and popularization of the motor home can be positively influenced, and very beneficial effects are brought to individuals, families and the society.
Drawings
FIG. 1 is a block diagram of the present invention.
FIG. 2 is a sectional view taken along line A-A of the structural diagram of the present invention.
FIG. 3 is a sectional view taken along line B-B of the structural diagram of the present invention.
FIG. 4 is a sectional view taken along line C-C of the structural drawing of the present invention.
FIG. 5 is a block diagram of a main beam of the present invention.
FIG. 6 is a D-D cross-sectional view showing a structure of a main beam frame of the present invention.
Fig. 7 is a view showing a structure of a bridge of the present invention.
Fig. 8 is a sectional view taken along line E-E of the structure of the bridge of the present invention.
Fig. 9 is a sectional view taken along direction F-F of the structure of the bridge of the present invention.
FIG. 10 is a sectional view taken along line G-G of a structure of the bridge of the present invention.
Fig. 11 is a block diagram of the DT damper of the present invention.
Fig. 12 is a cross-sectional view of a DT damper structure of the present invention.
In the drawings, 1, a main beam frame; 2. a sub-beam frame; a DT damper; 4. a damper fastening nut; 5. locking edges; 6. a pressure spring; 1-1, transversely supporting the frame; 1-2, erecting a frame; 1-3.X fixed mount; 1-4, a traction frame; 1-5, a damper mounting hole B; 2-1, drawing a corner bracket A; 2-2, drawing angle frame B; 2-3, drawing angle frame C; 2-4, drawing the angle frame D; 2-5, a right vertical flange A; 2-6. a right vertical baffle edge B; 2-7, a right vertical flange C; 2-8, right vertical flange D; 2-9, a left vertical blocking edge A; 2-10, a left vertical blocking edge B; 2-11, a left vertical blocking edge C; 2-12, a left vertical blocking edge D; 2-13, four frames of the flat plate; 2-14. a damper mounting hole A; 3-1, soaking rubber; 3-2. soft colloid; and 3-3, installing the bolt.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1-12:
the invention relates to a damping crossbeam, which comprises a main beam frame (1) and a secondary beam frame (2); the method is characterized in that: the novel steel wire rope further comprises a DT damper (3), a damper fastening nut (4), a serging (5) and a pressure spring (6), wherein the auxiliary beam frame (2) is arranged in the main beam frame (1), the auxiliary beam frame (2) is arranged on the upper side, and the main beam frame (1) is arranged on the lower side; a DT damper (3) and a pressure spring (6) are arranged between the auxiliary beam frame (2) and the main beam frame (1); the DT damper (3) consists of rubber bubbles (3-1), soft colloid (3-2) and mounting bolts (3-3); one end of the DT damper (3) is a hemisphere, and the other end of the DT damper is a bolt; the outer layer of the hemisphere is a rubber bubble (3-1), the inner layer of the hemisphere is a soft colloid (3-2), and the right side of the soft colloid (3-2) is provided with a base for mounting a bolt (3-3); the right end of the base of the mounting bolt (3-3) is wrapped in the rubber bubble (3-1) by the rubber bubble (3-1); the rubber bubble (3-1) is a soft body made of synthetic rubber, and has certain extension performance, shape recovery performance and certain fatigue resistance performance; the soft rubber body (3-2) is made of TPE materials, the DT dampers (3) and the pressure springs (6) are used for buffering vibration generated by up-and-down bumping when the motor home runs, and the purpose of shock absorption is achieved, and the main beam frame (1) is composed of a transverse supporting frame (1-1), a vertical frame (1-2), an X fixing frame (1-3) and a traction frame (1-4); an X-shaped X fixing frame (1-3) is arranged in the middle; the four sides of the X fixing frame (1-3) are provided with transverse supporting frames (1-1), and the middle of each transverse supporting frame (1-1) is provided with a damper mounting hole B (1-5); the upper end of the outer edge of the transverse supporting frame (1-1) is provided with a vertical frame (1-2); the lower end of the vertical frame (1-2) is vertically connected with the horizontal supporting frame (1-1); the left ends of the transverse supporting frame (1-1) and the vertical frame (1-2) on the left side of the X fixing frame (1-3) are provided with traction frames (1-4), and the traction frames (1-4) and the vertical frame (1-2) form a triangular structure.
The locking edge (5) is long and is respectively arranged at one side of a right vertical rib A (2-5), a right vertical rib B (2-6), a right vertical rib C (2-7), a right vertical rib D (2-8), a left vertical rib A (2-9), a left vertical rib B (2-10), a left vertical rib C (2-11) and a left vertical rib D (2-12) and used for locking the auxiliary beam frame (2) to be prevented from being bumped out in a transverse supporting frame (1-1) of the main beam frame (1) so as to achieve the aim of shock absorption and safety.
The auxiliary beam frame (2) is composed of an angle drawing frame A (2-1), an angle drawing frame B (2-2), an angle drawing frame C (2-3), an angle drawing frame D (2-4), a right vertical baffle edge A (2-5), a right vertical baffle edge B (2-6), a right vertical baffle edge C (2-7), a right vertical baffle edge D (2-8), a left vertical baffle edge A (2-9), a left vertical baffle edge B (2-10), a left vertical baffle edge C (2-11), a left vertical baffle edge D (2-12) and a flat four-side frame (2-13).
The upper sides and the right sides of the flat four side frames (2-13) of the auxiliary beam frame (2) are provided with angle pulling frames A (2-1); the right side and the lower side of a flat plate four-side frame (2-13) of the auxiliary beam frame (2) are provided with angle pulling frames B (2-2); the lower side and the left side of a flat plate four-side frame (2-13) of the auxiliary beam frame (2) are provided with angle pulling frames C (2-3); the left side and the upper side of a flat plate four-side frame (2-13) of the auxiliary beam frame (2) are provided with angle pulling frames D (2-4); the function of the utility model is that the flat plate four frames (2-13) are connected with a corner pulling frame A (2-1), a corner pulling frame B (2-2), a corner pulling frame C (2-3) and a corner pulling frame D (2-4)
The fixing structure is firm without deformation, and solid conditions are established for integral shock absorption.
The right part of the upper edge in the flat four-side frame (2-13) of the auxiliary beam frame (2) is provided with a right vertical flange A (2-5); the upper part of the right side in the flat four-side frame (2-13) of the auxiliary beam frame (2) is provided with a right vertical flange B (2-6); the lower part of the right side in the flat four-side frame (2-13) of the auxiliary beam frame (2) is provided with a right vertical baffle edge C (2-7); the right part of the lower edge in the flat four-side frame (2-13) of the auxiliary beam frame (2) is provided with a right vertical flange D (2-8); the left part of the lower edge in the flat four-side frame (2-13) of the auxiliary beam frame (2) is provided with a left vertical flange A (2-9); the lower part of the left side in the flat four frames (2-13) of the auxiliary beam frame (2) is provided with a left vertical flange B (2-10); the upper part of the left side in the flat four-side frame (2-13) of the auxiliary beam frame (2) is provided with a left vertical baffle edge C (2-11); the left part of the upper edge in the flat four-side frame (2-13) of the auxiliary beam frame (2) is provided with a left vertical baffle edge D (2-12); damper mounting holes A (2-14) are formed in the four flat frames (2-13) of the auxiliary beam frame (2).

Claims (1)

1. The invention relates to a damping crossbeam, which comprises a main beam frame (1) and an auxiliary beam frame (2); the method is characterized in that: the novel steel wire rope spring is characterized by further comprising a DT damper (3), a damper fastening nut (4), a serging (5) and a pressure spring (6), wherein the auxiliary beam frame (2) is arranged in the main beam frame (1), the auxiliary beam frame (2) is arranged on the upper side, and the main beam frame (1) is arranged on the lower side; a DT damper (3) and a pressure spring (6) are arranged between the auxiliary beam frame (2) and the main beam frame (1); the DT damper (3) consists of rubber bubbles (3-1), soft colloid (3-2) and mounting bolts (3-3); one end of the DT damper (3) is a hemispheroid, and the other end of the DT damper is a bolt; the outer layer of the hemisphere is a rubber bubble (3-1), the inner layer of the hemisphere is a soft colloid (3-2), and the right side of the soft colloid (3-2) is provided with a base for mounting a bolt (3-3); the right end of the base of the mounting bolt (3-3) is wrapped in the rubber bubble (3-1) by the rubber bubble (3-1); the rubber bubble (3-1) is a soft body made of synthetic rubber, and has certain extension performance, shape recovery performance and certain fatigue resistance performance; the soft colloid (3-2) is made of TPE materials, the DT damper (3) and the pressure spring (6) are used for buffering vibration generated by up-and-down bumping when the motor home runs so as to achieve the purpose of shock absorption, and the main beam frame (1) is composed of a transverse supporting frame (1-1), a vertical frame (1-2), an X fixing frame (1-3) and a traction frame (1-4); an X-shaped X fixing frame (1-3) is arranged in the middle; the four sides of the X fixing frame (1-3) are provided with transverse supporting frames (1-1), and the middle of each transverse supporting frame (1-1) is provided with a damper mounting hole B (1-5); the upper end of the outer edge of the transverse supporting frame (1-1) is provided with a vertical frame (1-2); the lower end of the vertical frame (1-2) is vertically connected with the horizontal supporting frame (1-1); the left ends of the transverse supporting frame (1-1) and the vertical frame (1-2) on the left side of the X-shaped fixing frame (1-3) are provided with traction frames (1-4), the traction frames (1-4) and the vertical frame (1-2) form a triangular structure, the locking edge (5) is in a long strip shape and is respectively arranged on one side of a right vertical baffle A (2-5), a right vertical baffle B (2-6), a right vertical baffle C (2-7), a right vertical baffle D (2-8), a left vertical baffle A (2-9), a left vertical baffle B (2-10), a left vertical baffle C (2-11) and a left vertical baffle D (2-12) and is used for locking the auxiliary beam frame (2) in the transverse supporting frame (1-1) of the main beam frame (1) and preventing the auxiliary beam frame (2) from being bumped out, so that the purposes of shock absorption and safety are achieved, and the auxiliary beam frame (2) is composed of angle pulling frames A (2-1), The angle drawing frame comprises an angle drawing frame B (2-2), an angle drawing frame C (2-3), an angle drawing frame D (2-4), a right vertical baffle edge A (2-5), a right vertical baffle edge B (2-6), a right vertical baffle edge C (2-7), a right vertical baffle edge D (2-8), a left vertical baffle edge A (2-9), a left vertical baffle edge B (2-10), a left vertical baffle edge C (2-11), a left vertical baffle edge D (2-12) and a flat four-frame (2-13), wherein the angle drawing frame A (2-1) is arranged on the upper side and the right side of the flat four-frame (2-13) of the auxiliary beam frame (2); the right side and the lower side of a flat plate four-side frame (2-13) of the auxiliary beam frame (2) are provided with angle pulling frames B (2-2); corner brackets C (2-3) are arranged at the lower sides and the left sides of the flat four side frames (2-13) of the auxiliary beam frame (2); the left side and the upper side of a flat plate four-side frame (2-13) of the auxiliary beam frame (2) are provided with angle pulling frames D (2-4); the auxiliary beam frame has the advantages that the flat four-side frame (2-13), the angle drawing frame A (2-1), the angle drawing frame B (2-2), the angle drawing frame C (2-3) and the angle drawing frame D (2-4) form a fixing structure which is firm and does not deform, so that a solid condition is established for integral shock absorption, and a right vertical baffle edge A (2-5) is arranged at the right part of the upper edge in the flat four-side frame (2-13) of the auxiliary beam frame (2); the upper part of the right side in the flat four-side frame (2-13) of the auxiliary beam frame (2) is provided with a right vertical flange B (2-6); the lower part of the right side in the flat four-side frame (2-13) of the auxiliary beam frame (2) is provided with a right vertical baffle edge C (2-7); the right part of the lower edge in the flat four-side frame (2-13) of the auxiliary beam frame (2) is provided with a right vertical flange D (2-8); the left part of the lower edge in the flat four-side frame (2-13) of the auxiliary beam frame (2) is provided with a left vertical flange A (2-9); the lower part of the left side in the flat four frames (2-13) of the auxiliary beam frame (2) is provided with a left vertical flange B (2-10); the upper part of the left side in the flat four-side frame (2-13) of the auxiliary beam frame (2) is provided with a left vertical baffle edge C (2-11); the left part of the upper edge in the flat four-side frame (2-13) of the auxiliary beam frame (2) is provided with a left vertical baffle edge D (2-12); damper mounting holes A (2-14) are formed in the four flat frames (2-13) of the auxiliary beam frame (2).
CN202011480056.3A 2020-12-15 2020-12-15 Shock attenuation girder Active CN113002627B (en)

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Application Number Priority Date Filing Date Title
CN202011480056.3A CN113002627B (en) 2020-12-15 2020-12-15 Shock attenuation girder

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CN113002627B true CN113002627B (en) 2022-05-13

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0544361A1 (en) * 1991-11-19 1993-06-02 Egbert Berend Holtkamp Collapsible caravan
JP2000170801A (en) * 1998-12-02 2000-06-23 San Jidosha Kogyo:Kk Braking device for towed vehicle
CN101557955A (en) * 2006-12-06 2009-10-14 翔风技术有限公司 Vibration damping device, method of controlling vibration damping device, method of correcting offset of vibration damping device, and leaf spring
CN203047358U (en) * 2012-12-05 2013-07-10 溧阳二十八所系统装备有限公司 Caravan chassis
CN207089427U (en) * 2017-08-10 2018-03-13 天津爱旅房车科技有限公司 A kind of follow-on caravan chassis
CN207684697U (en) * 2017-12-25 2018-08-03 重庆迈高电梯有限公司 A kind of lift car shock-absorbing limiting device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103661605A (en) * 2013-12-02 2014-03-26 唐雅蓉 Auxiliary frame structure of concrete mixer truck
CN203783174U (en) * 2014-03-18 2014-08-20 中国十七冶集团有限公司 Local buckle welding reinforcement device for single-angle steel of steel roof truss

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0544361A1 (en) * 1991-11-19 1993-06-02 Egbert Berend Holtkamp Collapsible caravan
JP2000170801A (en) * 1998-12-02 2000-06-23 San Jidosha Kogyo:Kk Braking device for towed vehicle
CN101557955A (en) * 2006-12-06 2009-10-14 翔风技术有限公司 Vibration damping device, method of controlling vibration damping device, method of correcting offset of vibration damping device, and leaf spring
CN203047358U (en) * 2012-12-05 2013-07-10 溧阳二十八所系统装备有限公司 Caravan chassis
CN207089427U (en) * 2017-08-10 2018-03-13 天津爱旅房车科技有限公司 A kind of follow-on caravan chassis
CN207684697U (en) * 2017-12-25 2018-08-03 重庆迈高电梯有限公司 A kind of lift car shock-absorbing limiting device

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Denomination of invention: A shock-absorbing beam

Effective date of registration: 20230809

Granted publication date: 20220513

Pledgee: Bank of Nanjing Co.,Ltd. Lianyungang Branch

Pledgor: JIANGSU DEFA RV TECHNOLOGY Co.,Ltd.

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