Motor home chassis with expanded space

Abstract

The utility model relates to a motor home chassis with an expansion space, which comprises a fixed box body, a rear expansion box body and a chassis assembly, and the chassis assembly comprises a fixed chassis and is connected to an original vehicle beam through a three-point type suspension component; the rear expansion box chassis is installed on the fixed chassis through an expansion transmission screw module, a box body positioning linear bearing, a rear expansion chassis supporting linear bearing and a positioning wheel set, the front end of the fixed box chassis is fixedly connected to the fixed chassis, and meanwhile, a plurality of box body positioning wheel sets are arranged between the lower side of the fixed box chassis and the rear expansion box chassis; an oil cylinder supporting rod is arranged at the rear end of the rear expansion box body. According to the utility model, larger distance and space at the expansion part are realized, the rear expansion of the rear carriage is more than 2m, and the stability and firmness of the rear carriage are ensured at the same time.

Description

Technical Field

[0001] The utility model relates to the field of automobiles, and in particular to a motorhome chassis with an expansion space. Background Art

[0002] As people's requirements for quality of life increase, RVs are becoming more and more popular. Most of the RVs on the market now do not have expandable compartments or have limited expansion space. The expansion compartments basically do not expand more than 1 meter. The reason is that the gravity support points are basically on one side of the box wall. The working principle is a bit like a seesaw. When a part of the outward expansion is suspended in the air, a part must be on the other side of the action point to keep the box balanced. The expanded part has no support points to bear and fix, so the outward expansion space is limited. Utility Model Content

[0003] The purpose of the utility model is to further increase the expansion distance of the RV to increase the internal space and enhance the experience of travel life.

[0004] The utility model provides a RV chassis with expansion space, including a fixed box body 4, a rear expansion box body 3, and a chassis assembly; the chassis assembly includes a fixed chassis 02, a rear expansion box chassis 03, and a fixed box chassis 04, and the two sides of the rear expansion box chassis 03 are respectively fixed with connecting pieces 034, the rear expansion box body 3 is installed on the rear expansion box chassis 03 and the above-mentioned connecting pieces 034, the fixed box body 4 is installed on the fixed box chassis 04, the fixed chassis 02 is connected to the original vehicle beam by a three-point suspension component, the rear expansion box chassis 03 is arranged in parallel on the upper side of the fixed chassis 02, and the rear expansion box chassis 03 and the connecting piece 034 are combined together , and is installed on the fixed chassis 02 through the expansion transmission screw module, the box positioning linear bearing and the expansion chassis support linear bearing, and a plurality of box positioning wheel groups 035 are provided between the lower side of the rear expansion box chassis 03 and the fixed chassis 02; the expansion transmission screw module comprises an expansion transmission screw 0311 and an expansion transmission screw motor 0312, wherein the expansion transmission screw 0311 is installed in the middle of the fixed chassis 02 along the axis direction of the vehicle body, both ends of the expansion transmission screw 0311 are installed on the upper side of the fixed chassis 02 by means of bearings, and the front end of the expansion transmission screw 0311 is connected to the expansion transmission screw motor 0312, and at the same time, The expansion transmission screw 0311 is meshed with a nut fixed on the lower side of the rear expansion box chassis 03; the box positioning linear bearing includes a plurality of linear bearing sliders 0331 and two linear bearing slideways 0332, wherein the linear bearing slideways 0332 are installed on both sides of the upper surface of the fixed chassis 02 along the axis of the vehicle body, and the linear bearing sliders 0331 are installed on the lower edges of the two side walls of the rear expansion box 3, and at positions corresponding to the linear bearing slideways 0332; the expansion chassis support linear bearing includes an expansion chassis support linear bearing slide rail 0321 and an expansion chassis support linear bearing slider 0322, wherein the expansion chassis support linear axis The bearing slide rails 0321 are installed on both sides of the upper surface of the fixed chassis 02 along the axis of the vehicle body, and are located on the inner side of the linear bearing slideway 0332. The expansion chassis supporting linear bearing slider 0322 is installed on the lower side of the connecting piece 034, and at a position corresponding to the expansion chassis supporting linear bearing slide rail 0321; the fixed box chassis 04 is arranged in parallel to the upper side of the rear expansion box chassis 03, and the front end of the fixed box chassis 04 is fixedly connected to the fixed chassis 02. At the same time, a plurality of box positioning wheel groups 035 are arranged between the lower side of the fixed box chassis 04 and the rear expansion box chassis 03; the rear end of the rear expansion box 3 is provided with a cylinder support rod 038.

[0005] Furthermore, the main bodies of the fixed box body 4, the rear expansion box body 3, the fixed chassis 02, the rear expansion box chassis 03 and the fixed box chassis 04 are all composed of square steel grids.

[0006] Furthermore, the oil cylinder support rod 038 is installed in the rearmost column of the rear expansion box 3 along the vertical direction.

[0007] Furthermore, a rear extension load-bearing hydraulic bearing assembly is provided, including a cylinder cross brace rod 021, two rear extension load-bearing hydraulic bearings 022 and two groups of barbs 023, wherein each rear extension load-bearing hydraulic bearing 022 is respectively fixed at both ends of the cylinder cross brace rod 021, and at the same time, each rear extension load-bearing hydraulic bearing 022 is respectively installed on both sides of the fixed chassis 02, and the two groups of barbs 023 are respectively arranged in the middle and rear parts of the lower side of the rear expansion box chassis 03, and the above-mentioned cylinder cross brace rod 021 is located between the two groups of barbs 023.

[0008] Furthermore, a load-bearing pulley is provided at the load-bearing connection between the expansion box cylinder cross brace 021 and the rear expansion box chassis 03, and the wheel fixing part in the load-bearing pulley is fixedly installed on the expansion box cylinder cross brace 021, and the polyurethane wheel in the load-bearing pulley is in contact with the lower surface of the rear expansion box chassis 03.

[0009] Furthermore, the box positioning wheel set 035 includes a polyurethane wheel 0351 , a wheel bearing 0352 , and a wheel fixing member 0354 , wherein the polyurethane wheel 0351 and the wheel bearing 0352 are coaxially mounted, and both ends of the wheel bearing 0352 are mounted on the wheel fixing member 0354 .

[0010] Furthermore, in the box positioning wheel set 035 , both ends of the wheel bearing 0352 are mounted on the wheel fixing member 0354 using wheel load-bearing springs 0353 .

[0011] Furthermore, the three-point suspension component is connected to the original vehicle chassis by screws, and the three-point suspension component is welded to the fixed chassis 02 .

[0012] The utility model has the following advantages: through the box body positioning wheel group positioning and load-bearing, box body positioning linear bearing positioning and load-bearing, expansion of chassis support linear bearing positioning and load-bearing, expansion of transmission screw module kinetic energy work, expansion of box body cylinder support rod positioning and load-bearing, expansion of box body cylinder cross brace rod positioning and load-bearing and other technical and accessory functional improvements, the combined work of various accessories can achieve the expansion of a larger distance and space while ensuring its stability and firmness, and can expand the rear compartment to more than 2 meters, greatly increasing the original compartment use area, making people's long-distance travel life more comfortable. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 : Schematic diagram of the expansion state structure of the RV described in this embodiment

[0014] Figure 2 : Chassis assembly structure diagram

[0015] Figure 3 : Schematic diagram of the chassis assembly from another angle

[0016] Figure 4 : Figure 2 AA section view

[0017] Figure 5 : Schematic diagram of the structure of the box positioning wheel group

[0018] In the figure: 3-rear expansion box, 4-fixed box, 5-side expansion box, 02-fixed chassis, 021-cylinder cross brace, 022-rear extension load-bearing hydraulic bearing, 023-barb, 03-rear expansion box chassis, 0311-expansion transmission screw, 0312-expansion transmission screw motor, 0321-expansion chassis support linear bearing slide, 0322-expansion chassis support linear bearing slider, 0331-linear bearing slider, 0332-linear bearing slide, 034-connecting part, 035-positioning wheel set, 0351-polyurethane wheel, 0352-wheel bearing, 0353-wheel load-bearing spring, 0354-wheel fixing part, 038-cylinder support rod, 04-fixed box chassis. DETAILED DESCRIPTION

[0019] The following is a specific embodiment of the present invention. People familiar with the technology can easily understand other advantages and functions of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0020] Embodiment 1:

[0021] This embodiment provides a motorhome with expansion space, including a fixed box body 4, a rear expansion box body 3, a chassis assembly, etc.

[0022] The chassis assembly includes a fixed chassis 02, a rear expansion box chassis 03, and a fixed box chassis 04. Connectors 034 are respectively fixed on both sides of the rear expansion box chassis 03. The rear expansion box body 3 is installed on the rear expansion box chassis 03 and the above-mentioned connectors 034. The fixed box body 4 is installed on the fixed box chassis 04. The fixed chassis 02 is connected to the original vehicle beam using a three-point suspension component. The rear expansion box chassis 03 is arranged parallel to the upper side of the fixed chassis 02, and the rear expansion box chassis 03 and the connector 034 are combined together, and are installed on the fixed chassis 02 through an expansion transmission screw module, a box positioning linear bearing, an expansion chassis support linear bearing and a positioning wheel group 035, and a plurality of box positioning wheel groups 035 are provided between the lower side of the rear expansion box chassis 03 and the fixed chassis 02.

[0023] The expansion transmission screw module includes an expansion transmission screw 0311 and an expansion transmission screw motor 0312, wherein the expansion transmission screw 0311 is installed in the middle of the fixed chassis 02 along the axis of the vehicle body, and both ends of the expansion transmission screw 0311 are installed on the upper side of the fixed chassis 02 using bearings, and the front end of the expansion transmission screw 0311 is connected to the expansion transmission screw motor 0312. At the same time, the expansion transmission screw 0311 is meshed with a nut fixed on the lower side of the rear expansion box chassis 03.

[0024] The box positioning linear bearing includes multiple linear bearing sliders 0331 and two linear bearing slides 0332, wherein the linear bearing slides 0332 are installed on both sides of the upper surface of the fixed chassis 02 along the axis direction of the vehicle body, and the linear bearing sliders 0331 are installed on the lower edges of the two side walls of the rear expansion box 3, and at positions corresponding to the linear bearing slides 0332.

[0025] The extended chassis support linear bearing includes an extended chassis support linear bearing slide rail 0321 and an extended chassis support linear bearing slider 0322, wherein the extended chassis support linear bearing slide rail 0321 is installed on both sides of the upper surface of the fixed chassis 02 along the axis direction of the vehicle body, and is located on the inner side of the linear bearing slideway 0332, and the extended chassis support linear bearing slider 0322 is installed on the lower side of the connecting piece 034, and at a position corresponding to the extended chassis support linear bearing slide rail 0321.

[0026] During the process of expansion or retraction, the expansion drive screw module provides the required driving force to drive the rear expansion box chassis 03 to expand or retract, and the length of the expansion displacement can be adjusted.

[0027] The fixed box chassis 04 is arranged parallel to the upper side of the rear expansion box chassis 03, and the front end of the fixed box chassis 04 is fixedly connected to the fixed chassis 02. At the same time, a plurality of box positioning wheel groups 035 are arranged between the lower side of the fixed box chassis 04 and the rear expansion box chassis 03.

[0028] The box positioning wheel set 035 includes a polyurethane wheel 0351, a wheel bearing 0352, a wheel load-bearing spring 0353, and a wheel fixing member 0354. The structure is as follows: Figure 4As shown, the polyurethane wheel 0351 is coaxially mounted with the wheel bearing 0352, and the two ends of the wheel bearing 0352 are mounted on the wheel fixing member 0354 using the wheel bearing spring 0353. In this embodiment, the wheel fixing member 0354 of a part of the box body positioning wheel group 035 is fixedly mounted on the lower side of the rear expansion box chassis 03, and the polyurethane wheel 0351 contacts the upper surface of the fixed chassis 02, which can ensure that the rear expansion box chassis 03 and the fixed chassis 02 can achieve smooth relative sliding. The wheel fixing member 0354 of the other part of the box body positioning wheel group 035 is fixedly mounted on the lower side of the fixed box chassis 04, and the polyurethane wheel 0351 contacts the upper surface of the rear expansion box chassis 03, which can ensure that the fixed box chassis 04 and the rear expansion box chassis 03 can achieve smooth relative sliding. The wheel bearing spring 0353 can be used to adaptively adjust the height to fit more smoothly and move and position the box.

[0029] The use of the box positioning wheel group 035, the box positioning linear bearing and the rear expansion chassis support linear bearing can ensure the stable and smooth movement and support of the rear expansion box chassis 03. Its function is to ensure the stable and smooth movement and support of the rear expansion box chassis 03.

[0030] In this embodiment, a rear extension load-bearing hydraulic bearing assembly is also provided, including a cylinder cross brace rod 021, two rear extension load-bearing hydraulic bearings 022 and two groups of barbs 023, wherein each rear extension load-bearing hydraulic bearing 022 is respectively fixed at both ends of the cylinder cross brace rod 021, and at the same time, each rear extension load-bearing hydraulic bearing 022 is respectively fixedly installed on both sides of the fixed chassis 02. The two groups of barbs 023 are respectively arranged at the middle and rear parts of the lower side of the rear expansion box chassis 03, and the cylinder cross brace rod 021 is located between the two groups of barbs 023. During the expansion process, the barbs 023 arranged at the middle part of the lower side of the rear expansion box chassis 03 will gradually approach the cylinder cross brace rod 021, until it contacts the cylinder cross brace rod 021, and then drive the cylinder cross brace rod 021 to expand outward synchronously with the expansion box chassis 03. During the recovery process, the barb 023 arranged at the rear lower part of the rear expansion box chassis 03 will gradually approach the cylinder cross brace rod 021 until it contacts the cylinder cross brace rod 021, and then drive the cylinder cross brace rod 021 and the expansion box chassis 03 to be recovered inward synchronously.

[0031] A load-bearing pulley is provided between the expansion box oil cylinder cross brace 021 and the rear expansion box chassis 03, which can play the role of load-bearing and smooth expansion. The structure of the load-bearing pulley is similar to that of the box positioning wheel group 035. The wheel fixing part in the load-bearing pulley is fixedly mounted on the expansion box oil cylinder cross brace 021, and the polyurethane wheel in the load-bearing pulley contacts the lower surface of the rear expansion box chassis 03. The two groups of barbs 023 described in this embodiment are 1 meter apart. When the rear expansion box chassis is extended outward, the chassis first moves relative to the load-bearing wheel to play the role of load-bearing and smooth. When expanded to 1 meter, the rear towing chassis hooks the oil cylinder cross brace 021, and the load-bearing pulley plays a load-bearing role, making the rear expansion distance farther.

[0032] The front end of the fixed box chassis 04 is fixedly connected to the fixed chassis 02. At the same time, a plurality of box positioning wheel groups 035 are provided between the lower side of the fixed box chassis 04 and the rear expansion box chassis 03. The structure and installation method thereof are similar to the box positioning wheel groups 035 installed between the fixed chassis 02 and the rear expansion box chassis 03, so that the rear expansion box chassis 03 can move smoothly. A fixed box 4 is installed on the top of the fixed box chassis 04.

[0033] The main bodies of the fixed box, rear expansion box, fixed chassis 02, rear expansion box chassis 03 and fixed box chassis 04 are all composed of square steel grids, wherein the fixed box 4 is installed on the fixed box chassis 04, and connecting parts 034 are respectively fixed on both sides of the rear expansion box chassis 03, and the rear expansion box 3 is installed on the rear expansion box chassis 03 and the above-mentioned connecting parts 034.

[0034] The rear end of the rear expansion box 3 is provided with a cylinder support rod 038. In this embodiment, the cylinder support rod 038 is installed in the last column of the rear expansion box 3 along the vertical direction. When the rear expansion box chassis 03 is expanded, the cylinder support rod 038 can be supported on the ground to bear the weight of the expansion box and ensure the stability of the entire vehicle body.

[0035] The original vehicle chassis is connected to the three-point suspension component and fixed by screws. The connection position of the three-point suspension component and the fixed chassis 02 is fixed by welding.

[0036] The above is only a preferred embodiment of the utility model, and is not intended to limit the protection scope of the utility model. Any equivalent transformation of the utility model made by any person skilled in the art using the above technical solution does not deviate from the protection scope of the utility model. The protection scope of the utility model shall be based on the contents recorded in the claims.

Claims

1. A RV chassis with expansion space, characterized in that: It includes a fixed box (4), a rear expansion box (3), and a chassis assembly; The chassis assembly comprises a fixed chassis (02), a rear expansion box chassis (03), and a fixed box chassis (04), and connecting pieces (034) are respectively fixed on both sides of the rear expansion box chassis (03), the rear expansion box body (3) is installed on the rear expansion box chassis (03) and the connecting piece (034), and the fixed box body (4) is installed on the fixed box chassis (04), and the fixed chassis (02) is connected to the original vehicle beam by means of a three-point suspension component, and the rear expansion box chassis (03) is arranged parallel to the upper side of the fixed chassis (02), and the rear expansion box chassis (03) and the connecting piece (034) are combined together and installed on the fixed chassis (02) through an expansion transmission screw module, a box body positioning linear bearing and an expansion chassis support linear bearing, and a plurality of box body positioning wheel groups (035) are arranged between the lower side of the rear expansion box chassis (03) and the fixed chassis (02); The expansion transmission screw module comprises an expansion transmission screw (0311) and an expansion transmission screw motor (0312), wherein the expansion transmission screw (0311) is installed in the middle of the fixed chassis (02) along the axis direction of the vehicle body, and both ends of the expansion transmission screw (0311) are installed on the upper side of the fixed chassis (02) by means of bearings, and the front end of the expansion transmission screw (0311) is connected to the expansion transmission screw motor (0312), and at the same time, the expansion transmission screw (0311) is meshed with a nut fixed on the lower side of the rear expansion box chassis (03); The box positioning linear bearing comprises a plurality of linear bearing sliders (0331) and two linear bearing slideways (0332), wherein the linear bearing slideways (0332) are installed on both sides of the upper surface of the fixed chassis (02) along the axis direction of the vehicle body, and the linear bearing sliders (0331) are installed on the lower edges of the two side walls of the rear expansion box (3) and at positions corresponding to the linear bearing slideways (0332); The extended chassis supporting linear bearing comprises an extended chassis supporting linear bearing slide rail (0321) and an extended chassis supporting linear bearing slider (0322), wherein the extended chassis supporting linear bearing slide rail (0321) is installed on both sides of the upper surface of the fixed chassis (02) along the vehicle body axis direction and is located on the inner side of the linear bearing slideway (0332), and the extended chassis supporting linear bearing slider (0322) is installed on the lower side of the connecting piece (034) and at a position corresponding to the extended chassis supporting linear bearing slide rail (0321); The fixed box chassis (04) is arranged parallel to the upper side of the rear expansion box chassis (03), and the front end of the fixed box chassis (04) is fixedly connected to the fixed chassis (02). At the same time, a plurality of box positioning wheel sets (035) are arranged between the lower side of the fixed box chassis (04) and the rear expansion box chassis (03); The rear end of the rear expansion box (3) is provided with a cylinder support rod (038).

2. The RV chassis with expansion space according to claim 1, characterized in that: The main bodies of the fixed box body (4), the rear expansion box body (3), the fixed chassis (02), the rear expansion box chassis (03) and the fixed box chassis (04) are all composed of square steel grids.

3. The RV chassis with expansion space according to claim 2, characterized in that: The oil cylinder support rod (038) is installed in the rearmost column of the rear expansion box (3) along the vertical direction.

4. The RV chassis with expansion space according to claim 1, characterized in that: A rear extension load-bearing hydraulic bearing assembly is also provided, comprising a cylinder cross brace rod (021), two rear extension load-bearing hydraulic bearings (022) and two groups of barbs (023), wherein each rear extension load-bearing hydraulic bearing (022) is respectively fixed at both ends of the cylinder cross brace rod (021), each rear extension load-bearing hydraulic bearing (022) is respectively installed on both sides of the fixed chassis (02), the two groups of barbs (023) are respectively arranged at the middle and rear parts of the lower side of the rear extension box chassis (03), and the cylinder cross brace rod (021) is located between the two groups of barbs (023).

5. The RV chassis with expansion space according to claim 4, characterized in that: A load-bearing pulley is provided at the load-bearing portion where the cylinder cross brace (021) is connected to the rear expansion box chassis (03); a wheel fixing member in the load-bearing pulley is fixedly mounted on the expansion box cylinder cross brace (021); and a polyurethane wheel in the load-bearing pulley contacts the lower surface of the rear expansion box chassis (03).

6. The RV chassis with expansion space according to claim 1, characterized in that: The box positioning wheel set (035) comprises a polyurethane wheel (0351), a wheel bearing (0352), and a wheel fixing member (0354), wherein the polyurethane wheel (0351) and the wheel bearing (0352) are coaxially mounted, and both ends of the wheel bearing (0352) are mounted on the wheel fixing member (0354).

7. The RV chassis with expansion space according to claim 6, characterized in that: In the box positioning wheel set (035), both ends of the wheel bearing (0352) are mounted on the wheel fixing member (0354) by means of wheel load-bearing springs (0353).

8. The RV chassis with expansion space according to claim 1, characterized in that: The three-point suspension component is fixedly connected to the original vehicle chassis by screws, and the three-point suspension component is welded to the fixed chassis (02).

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