Direction column with multi-dimensional adjustable structure

Abstract

The utility model discloses a multi-dimensional adjustable structure direction column which comprises an adjusting frame, a rotation driving mechanism, a rotation adjusting mechanism and a height adjusting mechanism, and the rotation driving mechanism comprises a side bearing plate, a main body rod, a rotation block, a hydraulic cylinder, a mounting frame and a limiting rod. The rotation adjusting mechanism comprises a rocker arm, a fixed toothed plate, a rotating toothed plate, a triangular support, a rotating frame and a linkage rod, the rotation driving mechanism enables the direction column to achieve flexible angle adjustment through combination of hydraulic driving and a rotating block, stable and reliable rotation driving is provided by the mechanism, and the rotation adjusting mechanism can adjust the angle of the direction column through cooperation of the rocker arm, the fixed toothed plate, the rotating toothed plate and the like. According to the height adjusting mechanism, multi-direction accurate adjustment is achieved, due to the design of a linkage rod, a plurality of components work in a coordinated mode, stability and synchronism of movement of the device in the adjusting process are guaranteed, and the height adjusting mechanism achieves accurate adjustment in the height direction through combination of a spline shaft, a spline shaft sleeve and a guide groove.

Description

Technical Field

[0001] This utility model relates to the field of steering column technology, and more specifically, to a multi-dimensional adjustable steering column structure. Background Technology

[0002] The application of a multi-dimensional adjustable structural directional column in agricultural machinery is a flexible adjustment device designed specifically for agricultural equipment, which can adapt to different operating scenarios and environmental requirements.

[0003] Existing steering gears typically only allow for simple single-direction adjustments, lacking multi-dimensional flexibility. If operators need to make comprehensive adjustments to angle, direction, and height simultaneously, they often cannot achieve this with existing equipment. Furthermore, many existing devices still rely primarily on manual mechanical adjustments, which are time-consuming, labor-intensive, and lack precision. This poses a significant challenge to work efficiency, especially in scenarios requiring frequent adjustments.

[0004] Existing steering gears typically lack height adjustment functionality, making it impossible to flexibly adjust them according to the operator's specific needs. For example, when the operator's height or work environment changes, due to the lack of an adjustable height structure, the operator often has to perform the operation in an ergonomic posture. Prolonged use can easily lead to fatigue, affecting work efficiency and comfort. At the same time, the lack of height adjustment functionality also limits the application of steering gears in some special scenarios, making it difficult to meet the needs for higher precision and diversified use. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the problems existing in the prior art, this utility model provides a multi-dimensional adjustable steering column to solve the technical problems mentioned in the background art, such as the monotonous adjustment method of the existing steering gear, the excessive need for manual intervention, the lack of height adjustment of the existing steering gear, and the inability to better meet the needs of the operator.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a multi-dimensional adjustable structural direction column, including an adjustment frame, a rotation drive mechanism, a rotation adjustment mechanism, and a height adjustment mechanism. The rotation drive mechanism includes a side support plate, a main rod, a rotating block, a hydraulic cylinder, a mounting frame, and a limiting rod. The mounting frame is fixedly installed on one end face of the side support plate and on one end of the main rod. The rotating block is rotatably installed on the other end of the main rod. The two ends of the hydraulic cylinder are rotatably connected to the rotating block and the mounting frame, respectively. The limiting rods are symmetrically installed on both sides of the rotating block. The rotation adjustment mechanism includes a rocker arm, a fixed tooth plate, a rotating tooth plate, a tripod, a rotation frame, and a linkage rod. One end of the rocker arm is connected to one end of the limiting rod. The fixed tooth plate is fixedly installed on the adjustment frame. The rotating tooth plate is installed on the rotation frame. The rotation frame and the adjustment frame are rotatably installed. Two sets of rocker arms and tripods are provided. The linkage rod is installed between the two sets of tripods. One end of the tripod is rotatably connected to one end of the rocker arm, and the other end of the tripod is connected to the rotating tooth plate.

[0009] The present invention is further configured such that the height adjustment mechanism includes a lower bushing, a splined shaft, an upper shaft rod, a splined bushing, a guide plate, a fixing groove, and a guide groove. The lower bushing is installed at the top end of the rotating frame. One end of the splined shaft extends into the rotating frame and the adjustment frame, and the other end of the splined shaft extends into the interior of the lower bushing. The upper shaft rod is connected to the splined bushing. The splined bushing can be linked with the upper shaft rod and the splined shaft, and the splined bushing slides directionally within the lower bushing. The guide groove is longitudinally arranged on the side wall of the lower bushing. The guide plate is installed on the side of the splined bushing and can be guided within the guide groove. The fixing groove is arranged on the guide plate.

[0010] The present invention is further configured such that a support rod is installed inside the adjustment frame, and a gear rotating assembly is installed at one end of the support rod, and the other end of the gear rotating assembly is connected to one end of the spline shaft. The gear rotating assembly connects the support rod and the spline shaft, and the rotation adjustment of the spline shaft is realized through gear transmission.

[0011] The present invention is further configured such that an upper bushing is installed at the top end of the lower bushing, and the upper bushing and the lower bushing are detachably connected. The detachable connection between the upper bushing and the lower bushing facilitates the maintenance and replacement of the device, while ensuring the stability and reliability of the height adjustment mechanism.

[0012] The present invention is further configured such that a limiting groove is provided on the side wall of the adjustment frame, and the limiting groove is set with a certain arc. The limiting rod can be rotated and guided in the limiting groove in accordance with the arc. The arc design of the limiting groove improves the guiding accuracy of the rocker arm movement and ensures the stability and precision of the rotation adjustment.

[0013] The present invention is further configured such that a fixing plate is fixedly installed on the side of the lower bushing, and a bolt rod is installed on the fixing plate. The bolt rod can pass through the fixing plate and the fixing groove to fix the bushing inside the lower bushing. The design of the fixing plate and the bolt rod allows the bushing to be stably fixed after adjustment, thereby ensuring that the steering column has good stability and reliability after the height is adjusted.

[0014] The present invention is further configured such that a support plate is installed at the bottom of the adjustment frame, and a side support plate is fixedly installed on the top end face of the support plate. The adjustment frame is fixedly installed at the top end of the support plate. The support plate and the base provide bottom support for the directional column, ensuring the stability of the entire device during multi-dimensional adjustment.

[0015] The present invention is further configured such that a base is installed at the bottom end of the support plate, and the bottom end of the base is installed at the desired position. The design of the base facilitates the installation of the equipment in the designated position, thereby improving the adaptability and practicality of the device.

[0016] (III) Beneficial Effects

[0017] Compared with the prior art, this utility model provides a multi-dimensional adjustable structural directional column, which has the following beneficial effects:

[0018] This utility model is equipped with a rotation drive mechanism. The rotation drive mechanism, through the combination of hydraulic drive and rotating block, enables the steering column to achieve flexible angle adjustment. This mechanism provides a smooth and reliable rotation drive. At the same time, the design of the limit rod can effectively limit the rotation range, ensuring the safety and operational stability of the device during use.

[0019] This utility model is equipped with a rotation adjustment mechanism, which achieves precise multi-directional adjustment through the cooperation of rocker arm, fixed tooth plate, and rotating tooth plate. The design of the linkage rod enables the coordinated work between multiple components, ensuring the smoothness and synchronization of the device's movement during the adjustment process, while improving the convenience of operation and the accuracy of adjustment.

[0020] This utility model is equipped with a height adjustment mechanism. The height adjustment mechanism achieves precise adjustment in the height direction through the combination of spline shaft, spline sleeve and guide groove. The design of guide groove and guide plate ensures directional sliding stability during the height adjustment process. Furthermore, through gear transmission and other structures, the reliability and control accuracy of the adjustment can be further improved, ensuring the adaptability of the steering column in different height usage scenarios. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the device in the unused state of this utility model;

[0022] Figure 2These are schematic diagrams of the overall structure of the device from different perspectives in this utility model;

[0023] Figure 3 This is a schematic diagram of the rotation drive mechanism in this utility model;

[0024] Figure 4 This is a schematic diagram of the height adjustment mechanism in this utility model;

[0025] Figure 5 This is a schematic diagram of the internal structure of the height adjustment mechanism in this utility model.

[0026] In the diagram: 1. Adjusting frame; 2. Side bearing plate; 3. Main rod; 4. Rotating block; 5. Hydraulic cylinder; 6. Mounting bracket; 7. Limiting rod; 8. Rocker arm; 9. Fixed gear plate; 10. Rotating gear plate; 11. Triangular frame; 12. Rotating frame; 13. Linkage rod; 14. Lower bushing; 15. Splined shaft; 16. Upper shaft rod; 17. Splined bushing; 18. Guide plate; 19. Fixing groove; 20. Guide groove; 21. Support rod; 22. Gear rotating assembly; 23. Upper bushing; 24. Limiting groove; 25. Fixing plate; 26. Bolt rod; 27. Support plate; 28. Base. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0029] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0030] Please see Figures 1-5A multi-dimensional adjustable structural directional column includes an adjustment frame 1, a rotation drive mechanism, a rotation adjustment mechanism, and a height adjustment mechanism. The rotation drive mechanism includes a side support plate 2, a main rod 3, a rotating block 4, a hydraulic cylinder 5, a mounting bracket 6, and a limiting rod 7. The mounting bracket 6 is fixedly installed on one end face of the side support plate 2 and on one end of the main rod 3. The rotating block 4 is rotatably installed on the other end of the main rod 3. The two ends of the hydraulic cylinder 5 are rotatably connected to the rotating block 4 and the mounting bracket 6, respectively. The limiting rods 7 are symmetrically installed on both sides of the rotating block 4. The mechanism includes a rocker arm 8, a fixed tooth plate 9, a rotating tooth plate 10, a triangular frame 11, a rotating frame 12, and a linkage rod 13. One end of the rocker arm 8 is connected to one end of the limiting rod 7. The fixed tooth is fixedly installed on the adjusting frame 1. The rotating tooth plate 10 is installed on the rotating frame 12. The rotating frame 12 is rotatably installed with the adjusting frame 1. There are two sets of rocker arms 8 and triangular frames 11. The linkage rod 13 is installed between the two sets of triangular frames 11. One end of the triangular frame 11 is rotatably connected to one end of the rocker arm 8, and the other end of the triangular frame 11 is connected to the rotating tooth plate 10.

[0031] In this embodiment, when the hydraulic cylinder 5 extends or retracts, it drives the rotating block 4 to rotate around the axis of the main body rod 3. Limiting rods 7 are symmetrically installed on both sides of the rotating block 4 to ensure its stability during rotation and prevent deviation. The rotation of the rotating block 4 is transmitted to the rocker arm 8 through the limiting rods 7, causing the rocker arm 8 to move along the limiting groove 24. The limiting groove 24 is located on the side wall of the adjusting frame 1 and has a certain arc. The limiting rod 7 rotates within the limiting groove 24 in coordination with the arc, ensuring the accurate rotation path of the rotating block 4. When the limiting rod 7 rotates with the rotating block 4, the rocker arm 8 moves along the limiting groove 24. When slot 24 moves, the movement of rocker arm 8 will cause tripod 11 to rotate. One end of tripod 11 is rotatably connected to one end of rocker arm 8, and the other end is connected to rotating tooth plate 10. The rotation of tripod 11 will cause rotating tooth plate 10 to rotate on rotating frame 12. Rotating tooth plate 10 meshes with fixed tooth plate 9 fixedly installed on adjusting frame 1. At this time, rocker arm 8 tends to separate fixed tooth plate 9 from rotating tooth plate 10, thereby adjusting the upper part of the movable direction column to a suitable angle. Linkage rod 13 is installed between the two sets of tripods 11 to ensure that the two sets of tripods 11 rotate synchronously, thereby achieving smooth rotation adjustment.

[0032] The height adjustment mechanism includes a lower bushing 14, a splined shaft 15, an upper shaft rod 16, a splined bushing 17, a guide plate 18, a fixing groove 19, and a guide groove 20. The lower bushing 14 is installed at the top end of the rotating frame 12. One end of the splined shaft 15 extends into the rotating frame 12 and the adjusting frame 1, and the other end of the splined shaft 15 extends into the interior of the lower bushing 14. The upper shaft rod 16 is connected to the splined bushing 17. The splined bushing 17 can be linked with the upper shaft rod 16 and the splined shaft 15, and the splined bushing 17 slides in a directional manner within the lower bushing 14. The guide groove 20 is longitudinally arranged on the side wall of the lower bushing 14. The guide plate 18 is installed on the side of the splined bushing 17, and the guide plate 18 can be guided within the guide groove 20. The fixing groove 19 is arranged on the guide plate 18.

[0033] When the height adjustment mechanism is required to operate, the operator loosens the bolt rod 26 on the fixing plate 25, allowing the flower bushing 17 to slide freely within the lower bushing 14. The bolt rod 26 passes through the fixing plate 25 and the fixing groove 19, fixing the flower bushing 17 inside the lower bushing 14. After loosening the bolt rod 26, the fixing plate 25 no longer exerts pressure on the flower bushing 17, allowing it to slide within the guide groove 20. After releasing the fixing plate 25, the operator can pull the upper shaft rod 16 upwards or downwards, engaging the flower bushing 17. The splined bushing 17 is linked to the splined shaft 15, thereby enabling the upper shaft rod 16 to move up and down. The guide plate 18 is installed on the side of the splined bushing 17 and slides in the guide groove 20 to ensure that the splined bushing 17 slides in the lower shaft sleeve 14 in a directional manner to prevent displacement. After adjusting to a suitable height, the operator tightens the bolt rod 26 on the fixing plate 25 to fix the splined bushing 17 inside the lower shaft sleeve 14. The bolt rod 26 passes through the fixing plate 25 and the fixing groove 19 to firmly press the splined bushing 17 to ensure that the height of the steering column is fixed.

[0034] Please see Figures 1-5As a supplementary embodiment of a multi-dimensional adjustable structural direction column for the rotation drive mechanism, rotation adjustment mechanism, and height adjustment mechanism: a support rod 21 is installed inside the adjustment frame 1, and a gear rotation assembly 22 is installed at one end of the support rod 21. The other end of the gear rotation assembly 22 is connected to one end of the spline shaft 15. An upper shaft sleeve 23 is installed at the top end of the lower shaft sleeve 14, and the upper shaft sleeve 23 and the lower shaft sleeve 14 are detachably connected. A limit groove 24 is opened on the side wall of the adjustment frame 1, and the limit groove 24 is set with a certain arc and limits... The rod 7 can be rotated and guided within the limiting groove 24. A fixing plate 25 is fixedly installed on the side of the lower bushing 14, and a bolt rod 26 is installed on the fixing plate 25. The bolt rod 26 can pass through the fixing plate 25 and the fixing groove 19 to fix the flower bushing 17 inside the lower bushing 14. A support plate 27 is installed at the bottom of the adjusting frame 1, and a side support plate 2 is fixedly installed on the top end face of the support plate 27. The adjusting frame 1 is fixedly installed at the top end of the support plate 27. A base 28 is installed at the bottom end of the support plate 27, and the bottom end of the base 28 is installed in the required position.

[0035] More specifically, the operator controls the extension and retraction of the hydraulic cylinder 5, which drives the rotating block 4 to rotate. The limit rod 7 moves within the limit groove 24, and the rocker arm 8 moves accordingly. The rotation of the tripod 11 causes the rotating tooth plate 10 to disengage from the fixed tooth plate 9, thereby adjusting the angle of the upper part of the steering column. After the adjustment is completed, the hydraulic cylinder 5 remains in the extension and retraction state to ensure that the angle of the steering column is fixed. The operator loosens the bolt rod 26 on the fixing plate 25, allowing the flower bushing 17 to slide freely within the lower bushing 14. The operator pulls the upper shaft rod 16, and the flower bushing 17 slides within the guide groove 20, thereby adjusting the height of the steering column. After adjusting to the appropriate height, the operator tightens the bolt rod 26 to fix the flower bushing 17 inside the lower bushing 14.

[0036] In summary, during the use or operation of the overall equipment: when the drive mechanism needs to be rotated, when the hydraulic cylinder 5 extends or retracts, it will drive the rotating block 4 to rotate around the axis of the main body rod 3. The limit rods 7 are symmetrically installed on both sides of the rotating block 4 to ensure that the rotating block 4 remains stable during rotation and prevents deviation. The rotation of the rotating block 4 will be transmitted to the rocker arm 8 through the limit rods 7, causing the rocker arm 8 to move along the limit groove 24. The limit groove 24 is set on the side wall of the adjustment frame 1 and has a certain arc. The limit rods 7 rotate and guide within the limit groove 24 in accordance with the arc, ensuring that the rotation path of the rotating block 4 is accurate.

[0037] When the adjustment mechanism needs to be rotated, when the limit rod 7 rotates with the rotating block 4, the rocker arm 8 will move along the limit groove 24. The movement of the rocker arm 8 will drive the tripod 11 to rotate. One end of the tripod 11 is rotatably connected to one end of the rocker arm 8, and the other end is connected to the rotating tooth plate 10. The rotation of the tripod 11 will drive the rotating tooth plate 10 to rotate on the rotating frame 12. The rotating tooth plate 10 meshes with the fixed tooth plate 9 fixedly installed on the adjustment frame 1. At this time, the rocker arm 8 tends to separate the fixed tooth plate 9 from the rotating tooth plate 10, so that the upper part of the movable direction column can be adjusted to a suitable angle. The linkage rod 13 is installed between the two sets of tripods 11 to ensure that the two sets of tripods 11 rotate synchronously, thereby achieving smooth rotation adjustment.

[0038] When the height adjustment mechanism is required to operate, the operator loosens the bolt rod 26 on the fixing plate 25, allowing the flower bushing 17 to slide freely within the lower bushing 14. The bolt rod 26 passes through the fixing plate 25 and the fixing groove 19, fixing the flower bushing 17 inside the lower bushing 14. After loosening the bolt rod 26, the fixing plate 25 no longer exerts pressure on the flower bushing 17, allowing it to slide within the guide groove 20. After releasing the fixing plate 25, the operator can pull the upper shaft rod 16 upwards or downwards, engaging the flower bushing 17. The splined bushing 17 is linked to the splined shaft 15, thereby enabling the upper shaft rod 16 to move up and down. The guide plate 18 is installed on the side of the splined bushing 17 and slides in the guide groove 20 to ensure that the splined bushing 17 slides in the lower shaft sleeve 14 in a directional manner to prevent displacement. After adjusting to a suitable height, the operator tightens the bolt rod 26 on the fixing plate 25 to fix the splined bushing 17 inside the lower shaft sleeve 14. The bolt rod 26 passes through the fixing plate 25 and the fixing groove 19 to firmly press the splined bushing 17 to ensure that the height of the steering column is fixed.

[0039] The operator controls the extension and retraction of the hydraulic cylinder 5, which drives the rotating block 4 to rotate. The limit rod 7 moves within the limit groove 24, and the rocker arm 8 moves accordingly. The rotation of the tripod 11 causes the rotating tooth plate 10 to disengage from the fixed tooth plate 9, thereby adjusting the angle of the upper part of the steering column. After adjustment, the hydraulic cylinder 5 remains in the extension and retraction state to ensure that the angle of the steering column is fixed. The operator loosens the bolt rod 26 on the fixing plate 25, allowing the flower bushing 17 to slide freely within the lower bushing 14. The operator pulls the upper shaft rod 16, and the flower bushing 17 slides within the guide groove 20, thereby adjusting the height of the steering column. After adjusting to the appropriate height, the operator tightens the bolt rod 26 to fix the flower bushing 17 inside the lower bushing 14.

[0040] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A multi-dimensional adjustable structural directional column, comprising an adjustment frame (1), a rotation drive mechanism, a rotation adjustment mechanism, and a height adjustment mechanism, characterized in that: The rotation drive mechanism includes a side support plate (2), a main rod (3), a rotating block (4), a hydraulic cylinder (5), a mounting bracket (6), and a limiting rod (7). The mounting bracket (6) is fixedly installed on one end face of the side support plate (2), and the mounting bracket (6) is installed on one end of the main rod (3). The rotating block (4) is rotatably installed on the other end of the main rod (3). The two ends of the hydraulic cylinder (5) are rotatably connected to the rotating block (4) and the mounting bracket (6) respectively. The limiting rod (7) is symmetrically installed on both sides of the rotating block (4). The rotation adjustment mechanism includes a rocker arm (8), a fixed tooth plate (9), and a rotating tooth plate (1). 0), Tripod (11), Rotating frame (12) and Linkage rod (13), one end of rocker arm (8) is connected to one end of limit rod (7), fixed tooth is fixedly installed on adjusting frame (1), rotating tooth plate (10) is installed on rotating frame (12), rotating frame (12) and adjusting frame (1) are rotatably installed, and rocker arm (8) and tripod (11) are provided in two sets, linkage rod (13) is installed between the two sets of tripod (11), one end of tripod (11) is rotatably connected to one end of rocker arm (8), and the other end of tripod (11) is connected to rotating tooth plate (10).

2. The multi-dimensional adjustable structural directional column according to claim 1, characterized in that: The height adjustment mechanism includes a lower bushing (14), a splined shaft (15), an upper shaft (16), a splined shaft sleeve (17), a guide plate (18), a fixing groove (19), and a guide groove (20). The lower bushing (14) is installed at the top end of the rotating frame (12). One end of the splined shaft (15) extends into the rotating frame (12) and the adjusting frame (1), and the other end of the splined shaft (15) extends into the interior of the lower bushing (14). The upper shaft (16) and... The splined shaft sleeve (17) is connected to the upper shaft rod (16) and the splined shaft (15). The splined shaft sleeve (17) slides in a direction within the lower shaft sleeve (14). The guide groove (20) is longitudinally set on the side wall of the lower shaft sleeve (14). The guide plate (18) is installed on the side of the splined shaft sleeve (17). The guide plate (18) can be guided within the guide groove (20). The fixing groove (19) is set on the guide plate (18).

3. The multi-dimensional adjustable structural directional column according to claim 1, characterized in that: The adjustment frame (1) is equipped with a support rod (21), and a gear rotating assembly (22) is installed at one end of the support rod (21), and the other end of the gear rotating assembly (22) is connected to one end of the spline shaft (15).

4. The multi-dimensional adjustable structural directional column according to claim 2, characterized in that: The upper bushing (23) is installed at the top end of the lower bushing (14), and the upper bushing (23) and the lower bushing (14) are detachably connected.

5. The multi-dimensional adjustable structural directional column according to claim 1, characterized in that: The adjustment frame (1) has a limiting groove (24) on its side wall, and the limiting groove (24) is set with a certain arc. The limiting rod (7) can be set to rotate and guide within the limiting groove (24) in accordance with the arc.

6. The multi-dimensional adjustable structural directional column according to claim 2, characterized in that: A fixing plate (25) is fixedly installed on the side of the lower bushing (14), and a bolt rod (26) is installed on the fixing plate (25). The bolt rod (26) can pass through the fixing plate (25) and the fixing groove (19) to fix the flower bushing (17) inside the lower bushing (14).

7. A multi-dimensional adjustable structural directional column according to claim 1, characterized in that: The bottom of the adjustment frame (1) is provided with a support plate (27), and the side support plate (2) is fixedly installed on the top end face of the support plate (27). The adjustment frame (1) is fixedly installed on the top end of the support plate (27).

8. A multi-dimensional adjustable structural directional column according to claim 7, characterized in that: The bottom end of the support plate (27) is provided with a base (28), and the bottom end of the base (28) is installed in the desired position.

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