Reversible frame ladder stand structure and tractor
By designing a flippable frame ladder structure and using connecting rods and spring limit devices to achieve the folding and storage of the ladder, the problem of fixed ladders taking up a lot of space is solved, and the space utilization rate of the tractor and the stability of the ladder are improved.
Patent Information
- Application Number
- CN202423044956.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-10
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-12-10
AI Technical Summary
The existing tractor ladder adopts a fixed structure, which takes up a lot of space and the auxiliary ladder is not commonly used, resulting in the cancellation of the auxiliary ladder structure on some tractor models.
A reversible frame ladder structure is designed. The ladder can be folded and stored by rotating the upper arm, lower arm, upper bracket and lower bracket, using a connecting rod structure and a spring limit device.
It reduces space occupation, saves space in the entire vehicle, improves the stability and reliability of the ladder, prevents the ladder from shaking and falling off, and facilitates installation and maintenance.
Smart Images
Figure CN223355482U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of tractor ladders, in particular to a reversible frame ladder structure and a tractor. Background Art
[0002] The existing ladder adopts a fixed structure, which takes up a large space, and the auxiliary ladder is not often used, so some models of tractors directly cancel the auxiliary ladder structure. Utility Model Content
[0003] The technical problem to be solved by the utility model is to provide a reversible frame ladder structure and a tractor in view of the deficiencies in the prior art.
[0004] The technical solution of the utility model to solve the above technical problems is as follows: a reversible frame ladder structure, including: an auxiliary ladder, at least one upper support arm, at least one lower support arm, at least one upper bracket, and at least one lower bracket. The two ends of the upper support arm are respectively rotatably connected to the auxiliary ladder and the upper bracket, and the two ends of the lower support arm are respectively rotatably connected to the auxiliary ladder and the lower bracket.
[0005] The beneficial effects of this utility model are as follows: the auxiliary ladder is connected to the support arm, allowing it to rotate with the holes in the upper and lower brackets acting as hinge points. This reduces space usage, and the connecting rod structure allows for convenient storage of the ladder. The auxiliary ladder can be folded, saving space in the vehicle, and can be retracted when not in use.
[0006] Furthermore, the upper support arm is rotatably connected to the top of the auxiliary ladder via a pin, and the lower support arm is rotatably connected to the middle of the auxiliary ladder via a pin.
[0007] The beneficial effects of adopting the above-mentioned further technical solution are: the design of the hinge position of the support arm and the auxiliary ladder facilitates the deployment and storage of the auxiliary ladder, and prevents the auxiliary ladder and the support arm from getting stuck. The pin hinge has a simple structure and is easy to install and maintain.
[0008] Furthermore, the number of the upper arm, the lower arm, the upper bracket and the lower bracket are two, the two upper arms are respectively located on both sides of the auxiliary ladder, the two lower arms are respectively located on both sides of the auxiliary ladder, the two upper brackets are respectively located on both sides of the auxiliary ladder, and the two lower brackets are respectively located on both sides of the auxiliary ladder.
[0009] The beneficial effect of adopting the above-mentioned further technical solution is that the folding method adopts a four-bar linkage mechanism. The upper support arm, lower support arm, upper bracket and lower bracket on both sides of the auxiliary ladder provide stable support for the auxiliary ladder, prevent the auxiliary ladder from shaking, increase the load strength of the auxiliary ladder, and improve the stability and reliability of the auxiliary ladder.
[0010] Furthermore, the upper bracket and the lower bracket are both installed on the tractor body.
[0011] The beneficial effect of adopting the above further technical solution is that the auxiliary ladder is stably supported by the bracket, which facilitates the installation of the auxiliary ladder on the tractor body.
[0012] Furthermore, a right side molding is installed on the tractor body, and the upper bracket and the lower bracket are both installed on the right side molding.
[0013] The beneficial effect of adopting the above-mentioned further technical solution is that the auxiliary ladder is stably supported by the right-side shape, making it easy to install the auxiliary ladder on the right-side shape.
[0014] Furthermore, a spring limiting device is installed on the tractor body, and a limiting hole adapted to the spring limiting device is installed on the auxiliary ladder.
[0015] The beneficial effect of adopting the above further technical solution is that a spring limit device is used for the auxiliary ladder to avoid disengagement due to vibration.
[0016] Furthermore, the spring limiting device includes: a limiting sleeve, a locking pin, a spring, and a handle. The locking pin is rotatably installed in the limiting sleeve, the handle is connected to the top of the locking pin, the top of the limiting sleeve is provided with a slope, the handle abuts against the slope, and the two ends of the spring are respectively connected to the limiting sleeve and the locking pin.
[0017] The beneficial effect of adopting the above-mentioned further technical solution is: when the handle of the spring limit device is toggled, the handle rotates on the inclined surface and the handle rises, which drives the spring to compress and the locking pin to disengage from the limiting hole, so that the auxiliary ladder can be operated. When the auxiliary ladder is folded, the handle can be toggled to allow the locking pin to continue to enter the limiting hole, thereby locking the ladder.
[0018] Furthermore, a limit plate is installed on the auxiliary ladder, and the limit hole is provided on the limit plate; a support plate is installed on the tractor body, and the support plate is an L-shaped structure, and the limit sleeve is installed on the support plate.
[0019] The beneficial effects of adopting the above further technical solution are: the setting of the limiting plate facilitates the opening of the limiting hole, and the setting of the support plate is used to stably support the spring limiting device.
[0020] Furthermore, the upper bracket and / or the lower bracket are U-shaped structures.
[0021] The beneficial effect of adopting the above-mentioned further technical solution is that: through the special structure of the lower bracket, when the auxiliary ladder is unfolded, the lower bracket interferes with the support arm, preventing the lower support arm from continuing to rotate, thereby limiting the auxiliary ladder.
[0022] In addition, the utility model also provides a tractor, comprising any one of the above-mentioned reversible frame ladder structures.
[0023] The beneficial effects of this utility model are as follows: the auxiliary ladder is connected to the support arm, allowing it to rotate with the holes in the upper and lower brackets acting as hinge points. This reduces space usage, and the connecting rod structure allows for convenient storage of the ladder. The auxiliary ladder can be folded, saving space in the vehicle, and can be retracted when not in use.
[0024] Advantages of additional aspects of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be understood through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 This is one of the structural schematic diagrams of the reversible frame ladder structure provided in an embodiment of the utility model.
[0026] Figure 2 This is the second structural schematic diagram of the reversible frame ladder structure provided in an embodiment of the utility model.
[0027] Figure 3 This is the third structural diagram of the reversible frame ladder structure provided in an embodiment of the present utility model.
[0028] Figure 4 This is the fourth structural diagram of the reversible frame ladder structure provided in an embodiment of the present utility model.
[0029] Figure 5 This is the fifth structural diagram of the reversible frame ladder structure provided in an embodiment of the present utility model.
[0030] Figure 6 This is the sixth structural diagram of the reversible frame ladder structure provided in an embodiment of the present utility model.
[0031] Explanation of the accompanying figures: 1. Right side shape; 2. Auxiliary ladder; 3. Upper support arm; 4. Lower bracket; 5. Upper bracket; 6. Spring limit device; 7. Lower support arm; 8. Limit hole; 9. Limit sleeve; 10. Lock pin; 11. Spring; 12. Handle. DETAILED DESCRIPTION
[0032] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The embodiments given are only used to explain the present invention and are not used to limit the scope of the present invention.
[0033] like Figures 1 to 6 As shown, an embodiment of the utility model provides a reversible frame ladder structure, including: an auxiliary ladder 2, at least one upper support arm 3, at least one lower support arm 7, at least one upper bracket 5, and at least one lower bracket 4. The two ends of the upper support arm 3 are respectively rotatably connected to the auxiliary ladder 2 and the upper bracket 5, and the two ends of the lower support arm 7 are respectively rotatably connected to the auxiliary ladder 2 and the lower bracket 4.
[0034] The beneficial effects of this utility model are as follows: the auxiliary ladder is connected to the support arm, allowing it to rotate with the holes in the upper and lower brackets acting as hinge points. This reduces space usage, and the connecting rod structure allows for convenient storage of the ladder. The auxiliary ladder can be folded, saving space in the vehicle, and can be retracted when not in use.
[0035] The present invention provides a reversible frame ladder structure, which can be a foldable auxiliary ladder structure, reducing space occupation. The connecting rod structure allows for easy storage of the ladder (auxiliary ladder). A spring locking mechanism (spring limiter) is used for the auxiliary ladder to prevent it from being disengaged due to vibration.
[0036] like Figures 1 to 6 As shown, further, the upper arm 3 is rotatably connected to the top of the auxiliary ladder 2 via a pin, and the lower arm 7 is rotatably connected to the middle of the auxiliary ladder 2 via a pin.
[0037] The beneficial effects of adopting the above-mentioned further technical solution are: the design of the hinge position of the support arm and the auxiliary ladder facilitates the deployment and storage of the auxiliary ladder, and prevents the auxiliary ladder and the support arm from getting stuck. The pin hinge has a simple structure and is easy to install and maintain.
[0038] like Figures 1 to 6 As shown, further, the number of the upper support arm 3, the lower support arm 7, the upper bracket 5 and the lower bracket 4 are two, the two upper support arms 3 are respectively located on both sides of the auxiliary ladder 2, the two lower support arms 7 are respectively located on both sides of the auxiliary ladder 2, the two upper brackets 5 are respectively located on both sides of the auxiliary ladder 2, and the two lower brackets 4 are respectively located on both sides of the auxiliary ladder 2.
[0039] The beneficial effect of adopting the above-mentioned further technical solution is that the folding method adopts a four-bar linkage mechanism. The upper support arm, lower support arm, upper bracket and lower bracket on both sides of the auxiliary ladder provide stable support for the auxiliary ladder, prevent the auxiliary ladder from shaking, increase the load strength of the auxiliary ladder, and improve the stability and reliability of the auxiliary ladder.
[0040] like Figures 1 to 6 As shown, further, the upper bracket 5 and the lower bracket 4 are both installed on the tractor body.
[0041] The beneficial effect of adopting the above further technical solution is that the auxiliary ladder is stably supported by the bracket, which facilitates the installation of the auxiliary ladder on the tractor body.
[0042] like Figures 1 to 6 As shown, further, a right side molding 1 is installed on the tractor body, and the upper bracket 5 and the lower bracket 4 are both installed on the right side molding 1.
[0043] The beneficial effect of adopting the above-mentioned further technical solution is that the auxiliary ladder is stably supported by the right-side shape, making it easy to install the auxiliary ladder on the right-side shape.
[0044] like Figures 1 to 6 As shown, further, a spring limiting device 6 is installed on the tractor body, and a limiting hole 8 adapted to the spring limiting device 6 is installed on the auxiliary ladder 2.
[0045] The beneficial effect of adopting the above further technical solution is that a spring limit device is used for the auxiliary ladder to avoid disengagement due to vibration.
[0046] like Figures 1 to 6 As shown, further, the spring limiting device 6 includes: a limiting sleeve 9, a locking pin 10, a spring 11, and a handle 12. The locking pin 10 is rotatably installed in the limiting sleeve 9, and the handle 12 is connected to the top of the locking pin 10. The top of the limiting sleeve 9 is provided with a slope, and the handle 12 abuts against the slope. The two ends of the spring 11 are respectively connected to the limiting sleeve 9 and the locking pin 10.
[0047] The beneficial effect of adopting the above-mentioned further technical solution is: when the handle of the spring limit device is toggled, the handle rotates on the inclined surface and the handle rises, which drives the spring to compress and the locking pin to disengage from the limiting hole, so that the auxiliary ladder can be operated. When the auxiliary ladder is folded, the handle can be toggled to allow the locking pin to continue to enter the limiting hole, thereby locking the ladder.
[0048] like Figures 1 to 6As shown, further, a limit plate is installed on the auxiliary ladder 2, and the limit hole 8 is provided on the limit plate; a support plate is installed on the tractor body, and the support plate is an L-shaped structure, and the limit sleeve 9 is installed on the support plate.
[0049] The beneficial effects of adopting the above further technical solution are: the setting of the limiting plate facilitates the opening of the limiting hole, and the setting of the support plate is used to stably support the spring limiting device.
[0050] like Figures 1 to 6 As shown, further, the upper bracket 5 and / or the lower bracket 4 is a U-shaped structure.
[0051] The beneficial effect of adopting the above-mentioned further technical solution is that: through the special structure of the lower bracket, when the auxiliary ladder is unfolded, the lower bracket interferes with the support arm, preventing the lower support arm from continuing to rotate, thereby limiting the auxiliary ladder.
[0052] The lower bracket can be set as a U-shaped structure, and the lower arm is hinged to the middle part of the lower bracket. When the lower arm is unfolded, the lower bracket supports and limits the lower arm.
[0053] The upper and lower brackets are mounted on the right side of the molding, connected to the auxiliary ladder via support arms (upper and lower). The support arms allow the ladder to rotate, hinged at the holes in the upper and lower brackets. A special structure on the lower bracket (which can be U-shaped) prevents further rotation of the lower arm when the ladder is deployed, thus limiting the ladder's position.
[0054] A spring limiter is mounted on the auxiliary ladder via a nut. The outer sleeve (limiting sleeve) of the spring limiter has an inclined surface and a spring inside. When the handle of the spring limiter is turned, the handle rotates on the inclined surface, raising the handle. This compresses the spring, causing the locking pin to disengage from the limiting hole, allowing the auxiliary ladder to be operated. After folding the auxiliary ladder, the handle can be turned to allow the locking pin to re-enter the limiting hole, locking the ladder (auxiliary ladder).
[0055] 1. The auxiliary ladder can be folded to save space in the vehicle. When use is completed, the ladder (auxiliary ladder) can be retracted.
[0056] 2. The folding method adopts a four-bar linkage mechanism.
[0057] 3. It has a spring locking mechanism (spring limit device) to lock the ladder (auxiliary ladder).
[0058] In addition, the utility model also provides a tractor, comprising any one of the above-mentioned reversible frame ladder structures.
[0059] The beneficial effects of this utility model are as follows: the auxiliary ladder is connected to the support arm, allowing it to rotate with the holes in the upper and lower brackets acting as hinge points. This reduces space usage, and the connecting rod structure allows for convenient storage of the ladder. The auxiliary ladder can be folded, saving space in the vehicle, and can be retracted when not in use.
[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. A reversible frame ladder structure, characterized in that: include: An auxiliary ladder, at least one upper arm, at least one lower arm, at least one upper bracket, and at least one lower bracket. The two ends of the upper arm are respectively rotatably connected to the auxiliary ladder and the upper bracket, and the two ends of the lower arm are respectively rotatably connected to the auxiliary ladder and the lower bracket.
2. The reversible frame ladder structure according to claim 1, characterized in that: The upper support arm is rotatably connected to the top of the auxiliary ladder via a pin shaft, and the lower support arm is rotatably connected to the middle portion of the auxiliary ladder via a pin shaft.
3. The reversible frame ladder structure according to claim 1, characterized in that: The number of the upper arm, the lower arm, the upper bracket and the lower bracket are all two, the two upper arms are respectively located on both sides of the auxiliary ladder, the two lower arms are respectively located on both sides of the auxiliary ladder, the two upper brackets are respectively located on both sides of the auxiliary ladder, and the two lower brackets are respectively located on both sides of the auxiliary ladder.
4. The reversible frame ladder structure according to claim 1, characterized in that: The upper bracket and the lower bracket are both mounted on the tractor body.
5. The reversible frame ladder structure according to claim 4, characterized in that: A right side molding is installed on the tractor body, and the upper bracket and the lower bracket are both installed on the right side molding.
6. The reversible frame ladder structure according to claim 4, characterized in that: A spring limiting device is installed on the tractor body, and a limiting hole adapted to the spring limiting device is installed on the auxiliary ladder.
7. The reversible frame ladder structure according to claim 6, characterized in that: The spring limiting device includes: a limiting sleeve, a locking pin, a spring, and a handle. The locking pin is rotatably installed in the limiting sleeve. The handle is connected to the top of the locking pin. The top of the limiting sleeve is provided with an inclined surface. The handle abuts against the inclined surface. The two ends of the spring are respectively connected to the limiting sleeve and the locking pin.
8. The reversible frame ladder structure according to claim 7, characterized in that: A limit plate is installed on the auxiliary ladder, and the limit hole is provided on the limit plate; a support plate is installed on the tractor body, and the support plate is an L-shaped structure, and the limit sleeve is installed on the support plate.
9. The reversible frame ladder structure according to claim 1, characterized in that: The upper bracket and / or the lower bracket are U-shaped structures.
10. A tractor, characterized in that: A reversible frame ladder structure comprising any one of claims 1 to 9.