Small-pitch leveling device applied to tripod

Abstract

The invention provides a small-pitch leveling device applied to a tripod, and relates to the technical field of electronic equipment structures. The device is used for telescopic adjustment of each supporting leg of the tripod, and each supporting leg is sequentially connected with an upper rod, a fine adjustment device and a lower rod from top to bottom. The upper rod and the lower rod are both of a cylinder structure. The fine adjustment device comprises a bearing seat, a bearing, an upper locking seat, a connecting shaft and a hand wheel of a barrel structure. When the hand wheel is rotated to drive the connecting shaft to rotate, the lower supporting seat drives the lower rod to move relative to the upper rod.

Description

Technical Field

[0001] The invention relates to the technical field of electronic equipment structures, and in particular to a small pitch leveling device applied to a tripod. Background Art

[0002] At present, most tripod leveling structures achieve leg height adjustment through spiral rotation. The existing technology initially levels the tripod by stretching the inner rod, and then rotates the outer rod to adjust the tripod using the thread. When the three pointers in the pointer simultaneously point to the leveling scale line, it indicates that the tripod has been leveled.

[0003] This type of tripod leveling structure has the following disadvantages:

[0004] (1) High leveling accuracy and fast leveling speed cannot be achieved at the same time: This type of adjustment structure achieves relative displacement by rotating the upper and lower rods to achieve leveling. When a fast leveling speed is required, the thread needs to have a large pitch. In this case, the relative displacement per turn is large, making it difficult to improve the accuracy. When high leveling accuracy is required, the thread needs to have a small pitch. In this case, the relative displacement per turn is small, making it difficult to improve the leveling speed. Therefore, it is difficult for this type of adjustment structure to achieve both high accuracy and high efficiency at the same time.

[0005] (2) Poor safety under heavy loads: Under heavy loads, the friction of the spherical rotation of the tripod legs is large, which will cause the legs to rotate during the leveling process. If the ground is uneven or soft, the rotation of the tripod legs will cause the equipment to move or even tilt, posing a safety hazard. Summary of the invention

[0006] In order to solve the shortcomings of the background technology, the present invention provides a small-pitch leveling device used on a tripod. Compared with a conventional tripod, the device has the advantages of fast leveling speed, high leveling accuracy, and no rotation of the legs. It can be used in situations where the tripod requires fast leveling speed and high accuracy.

[0007] The purpose of the present invention is to provide a small pitch leveling device applied to a tripod, which is used for telescopic adjustment of each leg of the tripod, wherein each leg is connected to an upper rod, a fine adjustment device and a lower rod in sequence from top to bottom; wherein both the upper rod and the lower rod are cylindrical structures;

[0008] The fine adjustment device comprises:

[0009] A bearing seat is sleeved in the upper rod;

[0010] A bearing, which is disposed in the bearing seat;

[0011] An upper locking seat, arranged outside the upper rod, fixing the upper rod on the bearing seat;

[0012] A connecting shaft, one end of which is tightly matched with the inner ring of the bearing, and the other end of which is threadedly connected with a lower support seat; the end of the lower support seat away from the connecting shaft is connected to the lower rod;

[0013] The hand wheel of the cylindrical structure is sleeved on the part of the connecting shaft away from the upper rod and the outside of the lower support seat, one end of which is fixedly connected to the connecting shaft, and the other end is penetrated by the lower rod; the inner wall of the hand wheel is in clearance with the lower support seat;

[0014] When the connecting shaft is rotated by rotating the hand wheel, the lower support seat drives the lower rod to move relative to the upper rod.

[0015] Preferably, the upper locking seat is a cylindrical structure, which is sleeved outside the upper rod; the bearing seat is a cylindrical structure, one end of which extends into the upper rod and is sleeved on the upper rod, and the outer edge of the other end is provided with a plurality of first ears;

[0016] The upper locking seat and the bearing seat are provided with a second lug corresponding to each first lug at the same end, and the upper rod is fixed between the upper locking seat and the bearing seat by connecting the first lug with the corresponding second lug.

[0017] Preferably, the bearing is arranged at one end of the bearing seat extending into the upper rod; a pressure plate is provided on one end face of the connecting shaft connected to the bearing, and the pressure plate is fixed to the connecting shaft by bolts, and the pressure plate presses the inner ring of the bearing.

[0018] Preferably, the handwheel is divided into two parts, the first part is the part connected to the connecting shaft, which is sleeved in the bearing seat and has a clearance fit with the inner side of the bearing seat; the second part is the part away from the bearing seat, and the diameter of the second part is larger than the diameter of the first part.

[0019] Preferably, the lower support seat is a cylindrical structure, an inner surface of one end of which is provided with an internal thread and is threadedly connected to an end of the connecting shaft away from the upper rod, and the other end is sleeved on the lower rod.

[0020] Preferably, a transition sleeve is also provided at the portion of the lower support seat connected to the lower rod, and the transition sleeve is clearance-matched with the inner wall of the hand wheel.

[0021] Preferably, a limit plate is provided on an end surface of the hand wheel away from the connecting shaft, and the limit plate prevents the lower support seat from detaching from the hand wheel.

[0022] Preferably, the inner wall of the lower support seat and the lower rod are connected via a lower fastener.

[0023] Preferably, the upper rod, the lower rod, the axes of the bearing and the hand wheel are all located on the same axis.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The present invention provides a small pitch leveling device for use on a tripod. The device provided by the present invention has high leveling accuracy: based on the coarse leveling of a conventional tripod, the present invention adds a fine adjustment device to perform secondary leveling. The secondary leveling adopts small pitch adjustment, which greatly improves the leveling accuracy. The device provided by the present invention has a fast leveling speed: the conventional tripod has a large pitch for coarse leveling, and the fine adjustment device has a small pitch for fine adjustment to achieve high-precision leveling. The leveling speed is fast, which is conducive to the rapid deployment of equipment. The device provided by the present invention is safe and reliable: the fine adjustment device only needs to rotate the hand wheel for fine adjustment, which has limited impact on the center of gravity of the equipment, and the supporting legs do not rotate, so the equipment will not move or overturn due to leveling, eliminating the safety hazard caused by the movement of the equipment during the leveling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Assembly diagram for a tripod with fine adjustment.

[0027] Figure 2 This is a cross-sectional view of the fine-tuning device.

[0028] Figure 3 It is a schematic diagram of the connection between the upper locking seat and the bearing seat.

[0029] Figure 4 This is the axonometric drawing of the handwheel.

[0030] Figure 5 Schematic diagram of the upper rod upward limit. DETAILED DESCRIPTION

[0031] Several specific embodiments of the present invention are described in detail below, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0032] The purpose of the present invention is to provide an efficient and high-precision small pitch leveling device for use on a tripod. On the basis of the coarse leveling of a conventional tripod, a fine adjustment device is added to perform secondary leveling to achieve efficient and high-precision leveling.

[0033] To achieve the above purpose, see Figures 1 to 5 As shown, a small pitch leveling device applied to a tripod is characterized in that it is used for telescopic adjustment of each leg of the tripod, and each leg is connected to an upper rod 1-1, a fine adjustment device 2 and a lower rod 1-2 in sequence from top to bottom; wherein the upper rod 1-1 and the lower rod 1-2 are both cylindrical structures;

[0034] The fine adjustment device 2 includes a bearing seat 2-2, a bearing 2-4, an upper locking seat 2-1, a connecting shaft 2-3 and a hand wheel 2-6 of a cylindrical structure;

[0035] The bearing seat 2-2 is sleeved in the upper rod 1-1; the bearing 2-4 is arranged in the bearing seat 2-2; the upper locking seat 2-1 is arranged outside the upper rod 1-1 to fix the upper rod 1-1 on the bearing seat 2-2; one end of the connecting shaft 2-3 is tightly matched with the inner ring of the bearing 2-4, and the other end is threadedly connected with the lower support seat 2-7; the end of the lower support seat 2-7 away from the connecting shaft 2-3 is connected to the lower rod 1-2; the handwheel 2-6 of the cylindrical structure is sleeved on the part of the connecting shaft 2-3 away from the upper rod 1-1 and outside the lower support seat 2-7, one end of which is fixedly connected to the connecting shaft 2-3, and the other end is penetrated by the lower rod 1-2; the inner wall of the handwheel 2-6 is gap-matched with the lower support seat 2-7; when the connecting shaft 2-3 is rotated by turning the handwheel 2-6, the lower support seat 2-7 drives the lower rod 1-2 to move relative to the upper rod 1-1, so as to Figure 2 It can be seen that when the connecting shaft 2-3 is rotated by turning the hand wheel 2-6, the upper rod 1-1 moves closer to the lower rod 1-2. Figure 5 It can be seen that when the connecting shaft 2-3 is driven to rotate by rotating the hand wheel 2-6, the lower support seat 2-7 moves upward, and the upper rod 1-1 moves in the opposite direction to the lower rod 1-2.

[0036] To this end, when the hand wheel is turned to drive the connecting shaft to rotate, the lower support seat moves axially relative to the upper rod 1-1 when the connecting shaft is threadedly connected to the lower support seat, so that the lower support seat drives the lower rod to move relative to the upper rod, thereby realizing efficient and high-precision leveling of each leg of the tripod.

[0037] In order to fix the upper rod on the bearing seat, the upper locking seat 2-1 is set as a cylindrical structure, which is sleeved outside the upper rod 1-1; the bearing seat 2-2 is a cylindrical structure, one end of which extends into the upper rod 1-1 and is sleeved on the upper rod 1-1, and the outer edge of the other end is provided with multiple first ears; the upper locking seat 2-1 and the bearing seat 2-2 are provided with a second ear corresponding to each first ear at the same end, and the upper rod 1-1 is fixed between the upper locking seat 2-1 and the bearing seat 2-2 by connecting the first ear with the corresponding second ear. To this end, the upper rod is clamped between the bearing seat and the upper locking seat, so that the upper rod is fixed on the bearing seat.

[0038] In order to prevent the bearing from axial movement, the bearing 2-4 is arranged at one end of the bearing seat 2-2 extending into the upper rod 1-1; a pressure plate 2-5 is arranged on one end surface of the connecting shaft 2-3 connected to the bearing 2-4, and the pressure plate 2-5 is fixed to the connecting shaft 2-3 by bolts, and the pressure plate 2-5 presses the inner ring of the bearing 2-4. Therefore, the pressure plate presses the inner ring of the bearing to prevent the bearing from axial movement.

[0039] In order to facilitate the operation of the hand wheel, the hand wheel 2-6 is divided into two parts. The first part is the part connected to the connecting shaft 2-3, which is sleeved in the bearing seat 2-2 and has a clearance fit with the inner side of the bearing seat 2-2; the second part is the part away from the bearing seat 2-2, and the diameter of the second part is larger than the diameter of the first part. Therefore, the diameter of the hand wheel is larger than the diameter of the upper rod and the lower rod, so that it is convenient to rotate it by hand to adjust each leg of the tripod.

[0040] In order to realize the relative movement of the lower support seat to the upper rod, the lower support seat 2-7 is set as a cylindrical structure, one end of which is provided with an internal thread on the inner surface and is threadedly connected to the end of the connecting shaft 2-3 away from the upper rod 1-1, and the other end is sleeved on the lower rod 1-2. Therefore, the upper rod can be axially moved by threading the connecting shaft and the lower support seat.

[0041] In order to achieve stable operation of the lower support seat inside the hand wheel, a transition sleeve 2-8 is also sleeved on the portion of the lower support seat 2-7 connected to the lower rod 1-2, and the transition sleeve 2-8 is clearance-matched with the inner wall of the hand wheel 2-6. When the hand wheel is turned, the clearance between the transition sleeve and the inner wall of the hand wheel is matched, so that the upper rod and the hand wheel can stably move toward the lower rod, thereby achieving efficient and high-precision leveling of each leg of the tripod.

[0042] A limit plate 2-10 is provided on the end surface of the hand wheel 2-6 away from the connecting shaft 2-3, and the limit plate 2-10 prevents the lower support seat 2-7 from detaching from the hand wheel 2-6.

[0043] The lower rod 1-2 is connected to the inner wall of the lower support seat 2-7 by the lower fastener 2-9, so that the lower rod is fixedly connected to the inner wall of the lower support seat.

[0044] In order to ensure smooth telescopic adjustment of each leg of the tripod, the axes of the upper rod 1-1, the lower rod 1-2, the bearing 2-4 and the hand wheel 2-6 in each fine adjustment device 2 are all located on the same axis.

[0045] In order to further illustrate a small pitch leveling device for use on a tripod provided by the present invention, further description is given in conjunction with the accompanying drawings. Figures 1 to 5 shown.

[0046] An efficient and high-precision small pitch leveling device used on a tripod, such as Figure 1 As shown, it includes a fine adjustment device 2 and a tripod 1, wherein the three sets of supporting legs of the tripod 1 each include an upper rod 1-1 and a lower rod 1-2, and the fine adjustment device 2 is arranged between the upper rod 1-1 and the lower rod 1-2. The tripod 1 is a conventional tripod, which can be roughly leveled, and the fine adjustment device 2 can be used to perform secondary fine adjustment to achieve high-precision leveling.

[0047] like Figure 2As shown, the fine adjustment device 2 is composed of an upper locking seat 2-1, a bearing seat 2-2, a connecting shaft 2-3, a bearing 2-4, a pressure plate 2-5, a hand wheel 2-6, a lower support seat 2-7, a transition sleeve 2-8, a lower fastener 2-9, and a limit plate 2-10.

[0048] The upper locking seat 2-1 is arranged outside the upper rod 1-1, and the bearing seat 2-2 is arranged inside. The upper locking seat 2-1 and the bearing seat 2-2 are connected by bolts and clamp the upper rod. A plurality of groups of lugs are arranged outside the upper locking seat 2-1 and the bearing seat 2-2, and holes are punched in the lugs, which can be connected by bolts.

[0049] like Figure 3 As shown, a plurality of groups of supporting ears are arranged on the outer side of the upper locking seat 2-1, and holes are punched inside the supporting ears so as to be fixedly connected with the bearing seat 2-2.

[0050] The inner cavity of the bearing seat 2-2 is stepped, and the bearing 2-4 is installed inside, and the outer ring of the bearing is tightly matched with the inner cavity of the bearing seat 2-2.

[0051] The connecting shaft 2-3 is a stepped shaft, the first section is tightly matched with the inner ring of the bearing 2-4, the second section is fixedly connected with the hand wheel 2-6 by screws, the third section is a stopper, and the fourth section is an external thread section, which can be connected with the upper internal thread of the lower support seat 2-7. A pressure plate 2-5 is arranged on the upper end surface of the connecting shaft 2-3, and the pressure plate 2-5 presses the inner ring of the bearing 2-4 to prevent the bearing 2-4 from axial movement.

[0052] The connecting shaft 2-3 and the lower support seat 2-7 are connected by threads, and the thread has a small pitch, so the relative displacement during rotation is small, and high-precision leveling can be achieved.

[0053] like Figure 4 As shown, the handwheel 2-6 is an axial structure, and both the inner and outer surfaces are in the form of stepped shafts. The upper part of the outer surface is clearance-matched with the inner surface of the upper locking seat 2-1, and the lower part of the outer surface is a knurled surface. The operator can turn the handwheel 2-6 through the knurled surface; the upper part of the inner surface is arranged with a threaded hole, which is fixedly connected to the connecting shaft 2-3, and the lower part of the inner surface is clearance-matched with the transition sleeve 2-8; the lower end face of the handwheel 2-6 is connected to the limit plate 2-10.

[0054] In order to prevent the hand wheel 2-6 and the upper locking seat 2-1 from having a larger matching surface so that the rotation is not stuck, the matching surface of the hand wheel 2-6 and the upper locking seat 2-1 is partially discontinuous.

[0055] The lower support seat 2-7 is an axial structure, and both the inner and outer surfaces are in the form of stepped shafts, divided into upper and lower sections. The inner surface of the upper section is an internal thread, which is threadedly connected to the connecting shaft 2-3; the outer surface of the lower section is threadedly connected to the transition sleeve 2-8, and the inner surface is connected to the lower fastener 2-9.

[0056] The lower buckle 2-9 is arranged on the outer side of the lower rod 1-2.

[0057] like Figure 5 As shown, preferably, a limit plate 2-10 is arranged on the lower end surface of the hand wheel 2-6 for limiting the position to prevent the fine adjustment device 2 from moving upward and separating from the lower rod 1-2.

[0058] By adjusting the gap between the upper outer surface of the hand wheel 2-6 and the bearing seat 2-2, and between the lower inner surface of the hand wheel 2-6 and the outer surface of the transition sleeve 2-8, the direction of the fine adjustment device 2 does not change and does not get stuck during rotation.

[0059] Because the bearing 2-4 is arranged on the top of the connecting shaft 2-3, the upper rod will not rotate with the rotation of the hand wheel 2-6.

[0060] The invention discloses a method for using an efficient and high-precision small-pitch leveling device applied to a tripod as follows: an operator holds a lower rod 1-2 with one hand and rotates a hand wheel 2-6 with the other hand. Since the hand wheel 2-6 is fixedly connected to a connecting shaft 2-3, the upper rod 1-1 can move relative to the lower rod 1-2 by relying on the thread between the connecting shaft 2-3 and a lower support seat 2-7, thereby achieving fine adjustment.

[0061] In summary, the present invention provides an efficient and high-precision small pitch leveling device for use on a tripod, comprising a fine adjustment device and a tripod, wherein the fine adjustment device is arranged between the upper rod and the lower rod of the tripod. The fine adjustment device is composed of an upper locking seat, a bearing seat, a connecting shaft, a bearing, a pressure plate, a hand wheel, a lower support seat, a transition sleeve, a lower fastener, and a limit plate. The fine adjustment device can realize the relative movement between the upper rod and the lower rod by rotating the hand wheel to achieve secondary fine leveling. The connecting shaft and the lower support seat are threadedly connected, and the thread is of a small pitch. The relative displacement during the rotation process is small, and high-precision leveling can be achieved. A bearing is arranged on the upper part of the connecting shaft, so that there is no relative rotation between the upper rod and the lower rod during the leveling process, that is, no follow-up rotation. A limit plate is arranged on the lower end surface of the handwheel for limiting, so as to prevent the fine adjustment device from moving upward and separating from the lower rod. There is a clearance fit between the upper outer surface of the handwheel and the bearing seat, and between the lower inner surface of the handwheel and the outer surface of the transition sleeve, so that the direction of the fine adjustment device does not change and does not get stuck during the rotation process. Compared with conventional tripods, the present invention has the advantages of fast leveling speed, high leveling accuracy and no rotation of the legs, and can be applied to situations where the tripod is required to have fast leveling speed and high accuracy.

[0062] The above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A small pitch leveling device used on a tripod, characterized in that: Used for telescopic adjustment of each leg of a tripod, each leg is connected in sequence from top to bottom to an upper rod (1-1), a fine adjustment device (2) and a lower rod (1-2); wherein the upper rod (1-1) and the lower rod (1-2) are both cylindrical structures; The fine adjustment device (2) comprises: A bearing seat (2-2) is sleeved inside the upper rod (1-1); A bearing (2-4) disposed in the bearing seat (2-2); An upper locking seat (2-1) is arranged outside the upper rod (1-1) and fixes the upper rod (1-1) on the bearing seat (2-2); A connecting shaft (2-3) has one end tightly fitted with the inner ring of the bearing (2-4) and the other end threadedly connected to a lower support seat (2-7); an end of the lower support seat (2-7) away from the connecting shaft (2-3) is connected to the lower rod (1-2); A hand wheel (2-6) of a cylindrical structure is sleeved on a portion of the connecting shaft (2-3) away from the upper rod (1-1) and outside the lower support seat (2-7), one end of which is fixedly connected to the connecting shaft (2-3) and the other end of which is penetrated by the lower rod (1-2); the inner wall of the hand wheel (2-6) is clearance-matched with the lower support seat (2-7); When the connecting shaft (2-3) is driven to rotate by rotating the hand wheel (2-6), the lower support seat (2-7) drives the lower rod (1-2) to move relative to the upper rod (1-1).

2. The small pitch leveling device for use on a tripod according to claim 1, characterized in that: The upper locking seat (2-1) is a cylindrical structure, which is sleeved outside the upper rod (1-1); the bearing seat (2-2) is a cylindrical structure, one end of which extends into the upper rod (1-1) and is sleeved on the upper rod (1-1), and the outer edge of the other end is provided with a plurality of first ears; A second lug corresponding to each first lug is provided at the same end of the upper locking seat (2-1) and the bearing seat (2-2), and the upper rod (1-1) is fixed between the upper locking seat (2-1) and the bearing seat (2-2) by connecting the first lug with the corresponding second lug.

3. The small pitch leveling device for use on a tripod according to claim 2, characterized in that: The bearing (2-4) is arranged at one end of the bearing seat (2-2) extending into the upper rod (1-1); a pressure plate (2-5) is arranged on one end surface of the connecting shaft (2-3) connected to the bearing (2-4); the pressure plate (2-5) is fixed to the connecting shaft (2-3) by bolts, and the pressure plate (2-5) presses the inner ring of the bearing (2-4).

4. The small pitch leveling device for use on a tripod according to claim 2, characterized in that: The hand wheel (2-6) is divided into two parts. The first part is the part connected to the connecting shaft (2-3), which is sleeved in the bearing seat (2-2) and has a clearance fit with the inner side of the bearing seat (2-2); the second part is the part away from the bearing seat (2-2), and the diameter of the second part is greater than the diameter of the first part.

5. The small pitch leveling device for use on a tripod according to claim 1, characterized in that: The lower support seat (2-7) is a cylindrical structure, one end of which is provided with an internal thread on its inner surface and is threadedly connected to one end of the connecting shaft (2-3) away from the upper rod (1-1), and the other end is sleeved on the lower rod (1-2).

6. The small pitch leveling device for use on a tripod according to claim 5, characterized in that: The lower support seat (2-7) is also sleeved with a transition sleeve (2-8) at the portion connected to the lower rod (1-2), and the transition sleeve (2-8) is clearance-matched with the inner wall of the hand wheel (2-6).

7. The small pitch leveling device for use on a tripod according to claim 6, characterized in that: A limit plate (2-10) is provided on the end surface of one end of the hand wheel (2-6) away from the connecting shaft (2-3), and the limit plate (2-10) prevents the lower support seat (2-7) from detaching from the hand wheel (2-6).

8. The small pitch leveling device for use on a tripod according to claim 5, characterized in that: The inner wall of the lower support seat (2-7) and the lower rod (1-2) are connected via a lower fastener (2-9).

9. The small pitch leveling device for use on a tripod according to claim 1, characterized in that: The axes of the upper rod (1-1), the lower rod (1-2), the bearing (2-4) and the hand wheel (2-6) are all located on the same axis.

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