Carrier

Abstract

The utility model discloses a carrier which comprises a first support assembly, a second support assembly, a first wheel assembly arranged at the bottom of the first support assembly and a second wheel assembly arranged at the bottom of the second support assembly, the first support assembly comprises a first bottom frame and a push rod, and one end of the first bottom frame is connected with the second support assembly. The lower portion of the push rod is rotationally connected with the other end of the first bottom frame. The carrier has a first use state and a second use state, when the carrier is in the first use state, the push rod is located at a first position away from the first underframe, and the first wheel assembly and the second wheel assembly jointly support the carrier; when the carrier is in the second use state, the push rod is located at the second position close to the first bottom frame, and the second wheel assembly supports the carrier. The carrier has multiple use functions, the utilization rate of the carrier can be greatly improved, and therefore waste is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a carrier. BACKGROUND

[0002] The carrier is usually used for carrying children and loading goods when going out. The carrier in the prior art has single function. A child trailer is disclosed in Chinese patent ZL2022216248134, which comprises a frame having a folded state and an unfolded state, a front wheel assembly and a rear wheel assembly arranged at the bottom of the frame, a mop arranged on the frame for a user to hold, and the frame comprises side frames arranged on left and right sides respectively, and a transversely extending cross connecting rod for connecting the two side frames. The side frame comprises a front vertical rod, a rear vertical rod, a lower supporting rod, an upper supporting rod, a front connecting rod and a rear connecting rod. The child trailer only has a trailer use state, so that the use range of the carrier is small and the utilization rate is low. SUMMARY

[0003] The utility model aims at the deficiency in the prior art and provides a carrier with multiple functions.

[0004] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of:

[0005] A carrier comprises a first support assembly, a second support assembly, a first wheel assembly arranged at the bottom of the first support assembly, and a second wheel assembly arranged at the bottom of the second support assembly. The first support assembly comprises a first chassis and a push rod. One end of the first chassis is connected to the second support assembly, and the lower part of the push rod is rotationally connected to the other end of the first chassis.

[0006] The carrier has a first use state and a second use state. When the carrier is in the first use state, the push rod is located at a first position away from the first chassis, and the first wheel assembly and the second wheel assembly jointly support the carrier. When the carrier is in the second use state, the push rod is located at a second position close to the first chassis, and the second wheel assembly supports the carrier.

[0007] In some embodiments, the second support assembly comprises a second chassis, one end of the first chassis is rotationally connected to one end of the second chassis, the first chassis is located in front of the second chassis when the carrier is in the first use state, and the first support assembly is located below the second chassis when the carrier is in the second use state.

[0008] In some embodiments, the second support assembly further comprises a pull rod arranged at the front of the second chassis, and one end of the pull rod is connected to one end of the second chassis.

[0009] And / or, the pull rod is slidably connected to the second chassis in the front-rear direction;

[0010] And / or, when the carrier is in the first use state, the pull rod is in the same plane as the first chassis;

[0011] And / or, the second chassis comprises side rods on the left and right sides and a cross rod connected between the side rods on the left and right sides, the pull rod is slidably connected to the side rods in the front-rear direction, and the first chassis is rotatably sleeved on the cross rod, or the first chassis is rotatably connected to the side rods.

[0012] In some embodiments, the second support assembly comprises a second chassis, and the first chassis is slidably arranged on the second chassis in the front-rear direction; when the carrier is in the first use state, the first chassis is in front of and away from the second chassis; when the carrier is in the second use state, the first chassis is close to the second chassis.

[0013] In some embodiments, the second support assembly comprises a second chassis, and one end of the first chassis is fixedly connected or integrally arranged on the second chassis.

[0014] In some embodiments, the first wheel assembly is arranged at the lower part of the push rod, or the first wheel assembly is arranged at the bottom of the first chassis.

[0015] And / or, the first wheel assembly is detachably connected to the push rod or the first chassis.

[0016] In some embodiments, the carrier further comprises a first locking mechanism, when the carrier is in the first use state, the first locking mechanism is in the locked state, and the first locking mechanism is arranged between the first chassis or the second support assembly and the push rod.

[0017] In some embodiments, the second support assembly comprises a pull rod, the first locking mechanism is arranged between the pull rod and the push rod; the first locking mechanism comprises a locking rod arranged on one of the push rod and the pull rod and a locking slot arranged on the other; when the first locking mechanism is in the locked state, the locking rod cooperates with the locking slot; when the first locking mechanism is in the unlocked state, the cooperation between the locking rod and the locking slot is disengaged.

[0018] In some embodiments, the carrier further comprises a second locking mechanism, when the carrier is in the second use state, the second locking mechanism is in the locked state, the second locking mechanism is arranged on one of the first chassis or the second support assembly and the push rod, and can cooperate or disengage with the other.

[0019] The second locking mechanism includes a locking hook with elasticity, the locking hook having a hook portion, and the other of the first chassis or the second support assembly and the push rod can be engaged with or disengaged from the hook portion.

[0020] In some embodiments, the second support assembly includes a second chassis connected to an end portion of the first chassis, a side frame rotatably arranged on left and right sides of the second chassis respectively, and a rear frame rotatably arranged at a rear portion of the second chassis, and the second wheel assembly is connected to the rear frame or the second chassis.

[0021] Thanks to the above technical scheme, the utility model has the following advantages compared with the prior art: in the first use state, the first wheel assembly and the second wheel assembly are simultaneously supported on the ground, and the carrier can be used as a trailer, and the carrier can carry children or articles; in the second use state, only the second wheel assembly is supported on the ground, and the carrier can be used as a shopping cart, and the carrier can also carry articles. This makes the carrier have multiple use functions, greatly improves the utilization rate of the carrier, and thus avoids waste. BRIEF DESCRIPTION OF DRAWINGS

[0022] FIG. 1 is a perspective view of a carrier in a first use state according to the present embodiment 1; Figure 1 FIG. 2 is a side view of the carrier in the first use state according to the present embodiment 1;

[0023] FIG. 3 is a perspective view of the carrier in a second use state according to the present embodiment 1; Figure 2 FIG. 4 is a side view of the carrier in the second use state according to the present embodiment 1;

[0024] FIG. 5 is a perspective view of the carrier during folding according to the present embodiment 1; Figure 3 FIG. 6 is a side view of the carrier during folding according to the present embodiment 1;

[0025] FIG. 7 is a perspective view of the carrier during folding according to the present embodiment 1; Figure 4 FIG. 8 is a side view of the carrier during folding according to the present embodiment 1;

[0026] FIG. 9 is a perspective view of the carrier during folding according to the present embodiment 1; Figure 5 FIG. 10 is a side view of the carrier during folding according to the present embodiment 1;

[0027] FIG. 11 is a perspective view of the carrier during folding according to the present embodiment 1; Figure 6 FIG. 12 is a side view of the carrier during folding according to the present embodiment 1;

[0028] FIG. 13 is a perspective view of the carrier during folding according to the present embodiment 1; Figure 7 FIG. 14 is a side view of the carrier during folding according to the present embodiment 1;

[0029] FIG. 15 is a perspective view of the carrier during folding according to the present embodiment 1; Figure 8 FIG. 16 is a side view of the carrier during folding according to the present embodiment 1;

[0030] Figure 2 is a perspective view of the carrier of Example 1 in a folded state; Figure 9 Figure 3 is a side view of the carrier of Example 1 in a folded state;

[0031] Figure 4 is a perspective view of the carrier of Example 1 in a folded state; Figure 10 Figure 5 is a side view of the carrier of Example 1 in a folded state;

[0032] Figure 6 is a perspective view of the carrier of Example 2 in a second state of use; Figure 11 Figure 7 is a side view of the carrier of Example 2 in a second state of use;

[0033] Figure 8 is a perspective view of the carrier of Example 3 in a first state of use; Figure 12 Figure 9 is a side view of the carrier of Example 3 in a first state of use;

[0034] Figure 10 is a perspective view of the carrier of Example 3 in a second state of use; Figure 13 Figure 11 is a side view of the carrier of Example 3 in a second state of use.

[0035] Figure 12 is a perspective view of the carrier of Example 4 in a first state of use; Figure 14 Figure 13 is a side view of the carrier of Example 4 in a first state of use;

[0036] Figure 14 is a perspective view of the carrier of Example 4 in a second state of use; Figure 15 Figure 15 is a side view of the carrier of Example 4 in a second state of use.

[0037] Figure 16 is a perspective view of the carrier of Example 5 in a first state of use; Figure 16 Figure 17 is a side view of the carrier of Example 5 in a first state of use;

[0038] Figure 18 is a perspective view of the carrier of Example 5 in a second state of use; Figure 17 Figure 19 is a side view of the carrier of Example 5 in a second state of use.

[0039] Figure 20 is a perspective view of the carrier of Example 6 in a first state of use; Figure 18 Figure 21 is a side view of the carrier of Example 6 in a first state of use.

[0040] Wherein: 1, first support assembly; 11, first chassis; 12, push rod; 2, second support assembly; 21, second chassis; 211, side rod; 212, cross rod; 22, pull rod; 221, lock slot; 23, side frame; 24, rear frame; 3, locking rod; 4, locking hook; 41, hook portion; 5, first wheel assembly; 6, second wheel assembly. DETAILED DESCRIPTION

[0041] The technical solutions of the present application will be further described below in conjunction with the drawings and specific examples.

[0042] In the following description, the directions of "front", "rear", "left", "right", "up", "down" and the like are all according to the directions shown in the drawings. Figure 2In the figure, the right direction is "front", the left direction is "back", the upper direction is "up", and the lower direction is "down". The directions perpendicular to the paper are "left" and "right". The above definitions of directions are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0043] Example 1

[0044] like Figures 1-12 As shown, the carrier of this utility model includes a first support assembly 1, a second support assembly 2, a first wheel assembly 5 disposed at the bottom of the first support assembly 1, and a second wheel assembly 6 disposed at the bottom of the second support assembly 2.

[0045] The first support assembly 1 includes a first base frame 11 and a push rod 12. One end of the first base frame 11 is connected to the second support assembly 2, and the lower part of the push rod 12 is rotatably connected to the other end of the first base frame 11.

[0046] The vehicle has a first usage state and a second usage state, and the push rod 12 has a first position and a second position. When the vehicle is in the first usage state, the push rod 12 is in the first position. At this time, the push rod 12 is away from the first base frame 11, and the plane of the push rod 12 is approximately perpendicular to the plane of the first base frame 11. Figure 1 and Figure 2 As shown. When the vehicle is in the second operating state, the push rod 12 is in the second position, at which time the push rod 12 is close to the first base frame 11, as shown. Figure 3 and Figure 4 As shown. By rotating the push rod 12 relative to the first base frame 11, the push rod 12 can be switched between the first position and the second position.

[0047] In this embodiment, the first wheel assembly 5 can be disposed at the lower part of the push rod 12, and the connection between the first wheel assembly 5 and the push rod 12 can also be detachably connected.

[0048] The first wheel assembly 5 can also be located at the bottom of the first base frame 11, and the first wheel assembly 5 is fixedly connected to or detachably connected to the first base frame 11. When the first wheel assembly 5 is detachably connected to the first base frame 11, the first wheel assembly 5 can be installed at the bottom of the first base frame 11 for use when the vehicle is in the first use state, and the first wheel assembly 5 can be removed from the bottom of the first base frame 11 for use when the vehicle is in the second use state.

[0049] The second support assembly 2 comprises a second base frame 21, a side frame 23 and a rear frame 24. One end of the second base frame 21 is connected to one end of the first base frame 11, the rear frame 23 is rotatably arranged at the other end of the second base frame 21, and the side frame 23 is rotatably arranged at the left and right sides of the second base frame 21 respectively. The second wheel assembly 6 is arranged at the bottom of the second base frame 21 or at the lower part of the rear frame 23.

[0050] In this embodiment, one end of the second base frame 21 is rotatably connected to one end of the first base frame 11, so that the first support assembly 1 can be rotated relative to the second support assembly 2 as a whole.

[0051] When the carrier is in the first use state, the first base frame 11 is located in front of the second base frame 21 and approximately in the same plane as the second base frame 21, the push rod 12 is in the first position, and the first wheel assembly 5 and the second wheel assembly 6 jointly stand on the ground to support the carrier, as shown in Figure 1 and Figure 2 In this use state, the carrier can be used as a trailer, and the space formed by the first support assembly 1 and the second support assembly 2 can carry children or articles.

[0052] When the carrier is in the second use state, the push rod 12 is in the second position, and the first base frame 11 is rotated relative to the second base frame 21 so that the first support assembly 1 is located below the second base frame 21 as a whole, and only the second wheel assembly 6 stands on the ground to support the carrier, as shown in Figure 3 and Figure 4 In this use state, the carrier can be used as a shopping cart, and the carrier can carry articles.

[0053] In this embodiment, the second support assembly 2 further comprises a pull rod 22, which is arranged at the front of the second base frame 21, and one end of the pull rod 22 is connected to one end of the second base frame 21. When the carrier is in the first use state, the pull rod 22 is located in the same plane as the first base frame 11, and at this time the pull rod 22 and the first base frame 11 can jointly support the articles or children seated in the first support assembly 1, as shown in Figure 1 and Figure 2 When the carrier is in the second use state, the pull rod 22 is used to pull the carrier, as shown in Figure 3 and Figure 4

[0054] Preferably, the pull rod 22 is slidably connected to the second base frame 21 in the front-rear direction. In this way, when the carrier is in use, the pull rod 22 can be slid relative to the second base frame 21 to be located in front of the second base frame 21 to pull the carrier, as shown in Figures 1-4 When the carrier is not in use and needs to be folded for storage, the pull rod 22 can be slid relative to the second base frame 21 to be close to the second base frame 21, as shown in Figure 11 and​Figure 12 As shown.

[0055] Specifically, as shown in Figure 1 and Figure 3 the second chassis 21 includes side rods 211 on the left and right sides and a cross rod 212 connected between the side rods 211 on the left and right sides. Each side rod 211 has a lumen extending along the length direction thereof, and the left and right sides of the pull rod 22 are slidably arranged in the lumen of the corresponding side rod 211 in the front-rear direction. One end of the first chassis 11 is fixedly provided with a shaft sleeve, which is sleeved on the cross rod 212 and can rotate around the cross rod 212. In other embodiments, the cross rod 212 can also be provided as part of the first chassis, and the two end portions of the cross rod 212 are rotatably connected with the side rods 211 to connect the first chassis 11 and the second chassis 21.

[0056] The carrier further includes a first locking mechanism arranged between the first chassis 11 or the second support assembly 2 and the push rod 12. When the carrier is in the first use state, the first locking mechanism is in a locked state, and the relative position between the first chassis 11 and the push rod 12 is locked by the first locking mechanism.

[0057] Preferably, the first locking mechanism is arranged between the pull rod 22 and the push rod 12. In this way, when the first locking mechanism is in the locked state, the relative position between the first chassis 11 and the second chassis 21 is also in the locked state, so that it is not necessary to additionally arrange a locking mechanism to lock the relative position between the first chassis 11 and the second chassis 21, thereby simplifying the structure of the carrier.

[0058] Specifically, the first locking mechanism includes a locking rod 3 and a locking groove 221 capable of disengageably cooperating with the locking rod 3, the locking rod 3 is arranged on one of the push rod 12 and the pull rod 22, and the locking groove 221 is arranged on the other one of the push rod 12 and the pull rod 22. When the first locking mechanism is in the locked state, the locking rod 3 cooperates with the locking groove 221, so that the first chassis 11 and the second chassis 21 cannot rotate relative to each other, and the push rod 12 and the first chassis 11 also cannot rotate relative to each other, as shown in Figure 1 and Figure 2 When the first locking mechanism is in the unlocked state, the locking rod 3 is disengaged from the locking groove 221, and the push rod 12 can rotate relative to the first chassis 11, and the first chassis 11 can also rotate relative to the second chassis 21.

[0059] In this embodiment, the locking groove 221 has an opening arranged downward, so that the locking rod 3 can enter the locking groove 221 from the opening or disengage from the locking groove 221 from the opening.

[0060] The carrier further comprises a second locking mechanism, which is arranged on one of the first chassis 11 or the second support assembly 2 and the push rod 12 and can be engaged with or disengaged from the other. When the carrier is in the second use state, the second locking mechanism is in the locked state, and the relative position between the push rod 12 and the first chassis 11 or the second support assembly 2 is locked by the second locking mechanism.

[0061] Preferably, the second locking mechanism is arranged between the second chassis 21 and the push rod 12. In this way, when the second locking mechanism is in the locked state, the relative position between the first chassis 11 and the second chassis 21 is also in the locked state, so that it is not necessary to additionally arrange a locking mechanism to lock the relative position between the first chassis 11 and the second chassis 21, thereby simplifying the structure of the carrier.

[0062] As shown in Figure 1 , the second locking mechanism comprises a locking hook 4 with elasticity, which has a hook portion 41, and the other of the first chassis 11 or the second support assembly 2 and the push rod 12 can be engaged with or disengaged from the hook portion 41.

[0063] In this embodiment, the locking hook 4 is fixedly arranged on the push rod 12. When the carrier is in the second use state, the hook portion 41 of the locking hook 4 is clamped on the second chassis 21, as shown in Figure 3 and Figure 4 . The hook portion 41 of the locking hook 4 is clamped on the second chassis 21 or disengaged from the second chassis 21 by elastic deformation of the locking hook 4.

[0064] When the carrier is converted from the first use state to the second use state, the push rod 12 is operated to rotate the first support assembly 1 as a whole downward relative to the second chassis 21 and close to the second chassis 21, so that the locking rod 3 is disengaged from the locking groove 221, and the first locking mechanism is in the unlocked state, and the push rod 12 can be rotated to close to the first chassis 11, as shown in Figure 5 and Figure 6 . Until the second chassis 21, the first chassis 11 and the push rod 12 are close to each other, the hook portion 41 of the locking hook 4 is clamped on the second chassis 21, the relative position of the second chassis 21, the first chassis 11 and the push rod 12 is locked, and the carrier is in the second use state.

[0065] When the carrier is converted from the second use state to the first use state, the push rod 12 is operated to rotate the first support assembly 1 as a whole forward relative to the second chassis 21 and away from the second chassis 21, so that the hook portion 41 of the locking hook 4 is elastically deformed to disengage from the second chassis 21, and the second locking mechanism is in the unlocked state, and the push rod 12 can be rotated to be away from the first chassis 11, as shown in Figure 5 and Figure 6As shown. Until the first base frame 11 rotates to be in front of the second base frame 21, the plane where the push rod 12 is located is approximately perpendicular to the plane where the first base frame 11 is located. At this time, the locking rod 3 enters the locking groove 221 from the opening of the locking groove 221, so that the first locking mechanism is in the locked state, and the vehicle is in the first use state.

[0066] When not in use, the vehicle can be folded. When folded, the vehicle is switched to a second usage state. Then, the left and right side frames 23 are rotated sequentially to the left or right towards the inside of the vehicle, bringing them closer to the second base frame 21. Figure 7 and Figure 8 As shown; rotate the rear frame 24 forward to bring it closer to the second base frame 21, as shown. Figure 9 and Figure 10 As shown; the pull rod 22 slides backward relative to the second base frame 21 and moves closer to the second base frame 21, finally folding as shown. Figure 11 and Figure 12 As shown. When folded, this vehicle has a compact structure, small size, and is easy to carry and store.

[0067] During the folding process of the vehicle, the order of rotation of the side frames 23 on both sides, rotation of the rear frame 24, and sliding of the lever 22 can be adjusted.

[0068] Example 2

[0069] In this embodiment, compared to embodiment 1, the pull rod 22 is not provided. The push rod 12 can be set to be relatively long. Alternatively, the push rod 12 can be set to the form of a telescopic rod, where the push rod 12 is in a retracted state when the vehicle is in the first use state, and in an extended state when the vehicle is in the second use state. In both the first and second use states, the vehicle is pulled by operating the push rod 12, such as... Figure 13 and Figure 14 As shown.

[0070] Example 3

[0071] In this embodiment, the first base frame 11 is slidably mounted on the second base frame 21 in the front-to-back direction. When the vehicle is in the first use state, the first base frame 11 is located in front of and away from the second base frame 21, and the push rod 12 is in the first position, such as... Figure 15 and Figure 16 As shown. When the vehicle is in the second usage state, the first base frame 11 and the second base frame 21 are close together, and the push rod 12 is in the second position, as shown. Figure 17 and Figure 18 As shown. By sliding the first base frame 11 relative to the second base frame 21 and rotating the push rod 12 relative to the first base frame 11, the vehicle can be switched between a first use state and a second use state.

[0072] Embodiment 4

[0073] In this embodiment, one end of the first chassis 11 is fixedly connected or integrally arranged on the second chassis 21. That is, the first chassis 11 and the second chassis 21 form an integral structure, and the carrier is switched between the first use state and the second use state by rotating the push rod 12 relative to the first chassis 11.

[0074] In this embodiment, the side frames 23 can also respectively extend forward to the front of the first chassis 11, so that in the first use state, the left and right side frames 23, the rear frame 24 and the push rod 12 form a four-around-enclosed seating space.

[0075] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and to implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made in accordance with the spirit and essence of the present application shall be covered within the protection scope of the present application.

Claims

1. A carrier, characterized by: The carrier has a first use state and a second use state, when the carrier is in the first use state, the push rod is located at a first position away from the first chassis, and the first wheel assembly and the second wheel assembly jointly support the carrier; when the carrier is in the second use state, the push rod is located at a second position close to the first chassis, and the second wheel assembly supports the carrier. The second support assembly includes a second chassis, one end of the first chassis is rotatably connected to one end of the second chassis; when the carrier is in the first use state, the first chassis is located in front of the second chassis; when the carrier is in the second use state, the first support assembly is located below the second chassis.

2. The vehicle of claim 1, wherein: The second support assembly further includes a pull rod arranged at the front of the second chassis, one end of the pull rod is connected to one end of the second chassis; 3. The carrier of claim 2, wherein: And / or, the pull rod is slidably connected to the second chassis in the front-rear direction; And / or, when the carrier is in the first use state, the pull rod is located in the same plane as the first chassis; And / or, the second chassis includes side rods located on the left and right sides and a cross rod connected between the side rods on the left and right sides, the pull rod is slidably connected to the side rods in the front-rear direction, and the first chassis is rotatably sleeved on the cross rod, or the first chassis is rotatably connected to the side rods. The second support assembly includes a second chassis, and the first chassis is slidably arranged on the second chassis in the front-rear direction; when the carrier is in the first use state, the first chassis is located in front of the second chassis and away from the second chassis; when the carrier is in the second use state, the first chassis is close to the second chassis.

4. The vehicle of claim 1, wherein: The second support assembly includes a second chassis, and one end of the first chassis is fixedly connected or integrally arranged on the second chassis.

5. The carrier of claim 1, wherein: The first wheel assembly is arranged at the lower part of the push rod, or the first wheel assembly is arranged at the bottom of the first chassis; 6. The vehicle of claim 1, wherein: And / or, the first wheel assembly is detachably connected to the push rod or the first chassis. The carrier further includes a first locking mechanism, when the carrier is in the first use state, the first locking mechanism is in a locked state, and the first locking mechanism is arranged between the first chassis or the second support assembly and the push rod.

7. The carrier of claim 1, wherein: The second support assembly includes a pull rod, and the first locking mechanism is arranged between the pull rod and the push rod; the first locking mechanism includes a locking rod arranged on one of the push rod and the pull rod and a locking slot arranged on the other; 8. The vehicle of claim 7, wherein: ​ When the first locking mechanism is in the locked state, the locking rod is engaged with the locking slot; when the first locking mechanism is in the unlocked state, the engagement between the locking rod and the locking slot is disengaged.

9. The vehicle of claim 1, wherein: The carrier further comprises a second locking mechanism, which is in a locked state when the carrier is in a second use state, is arranged on one of the first chassis or the second support assembly and the push rod and can be engaged with or disengaged from the other; The second locking mechanism comprises a locking hook with elasticity, which has a hook portion, and the other of the first chassis or the second support assembly and the push rod can be engaged with or disengaged from the hook portion.

10. The vehicle of claim 1, wherein: The second support assembly comprises a second chassis connected with one end of the first chassis, side enclosing frames rotatably arranged on left and right sides of the second chassis respectively, and a rear enclosing frame rotatably arranged at a rear portion of the second chassis, and the second wheel assembly is connected with the rear enclosing frame or the second chassis.

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