Prism bar positioning structure

Abstract

The utility model discloses a prism bar positioning structure, and belongs to the field of engineering measurement. Comprising a positioning pin; a plurality of straight holes are formed in the rod body at intervals, and the center lines of the straight holes are perpendicular to the center line of the rod body; the center line position of the straight hole corresponds to the numerical value of a dial gauge formed on the rod body; an inserting part is formed on the positioning pin; the inserting part is used for being inserted into the straight hole in the center line direction of the straight hole, and the center line position of the positioning pin coincides with the center line position of the straight hole. When the insertion part is inserted into the straight hole, the outer wall surface of the positioning pin abuts against the end surface of the prism bar. The prism has the beneficial effects that after the rod body in the prism rod is drawn out of the prism rod by a certain distance, the rod body is inserted into the straight hole formed in the rod body through the positioning pin, so that the rod body can be prevented from retracting into the prism rod, and the rod body is effectively fixed.

Description

Technical Field

[0001] This application relates to the field of engineering surveying, and more specifically, to a prism rod positioning structure. Background Technology

[0002] A prism rod (also known as a centering rod) is an auxiliary tool used in surveying and mapping, often in conjunction with a total station. The main function of the prism rod is to ensure precise alignment and levelness during measurement, thereby improving accuracy.

[0003] During use, the staff will stand in a fixed position holding the prism rod, and then pull the rod out a certain distance from the prism rod. The length pulled out is judged by the scale on the rod. Then, the staff will control the locking device on the prism rod to fix the pulled-out rod, so that the bubble in the bubble level is in the center position, and the prism rod is perpendicular to the ground.

[0004] The fixing mechanism includes a rotating wheel, a screw, and a locking sleeve. The locking sleeve is mounted on the prism rod and has a threaded hole perpendicular to the axis of the prism rod. The screw is threaded into the threaded hole. The rotating wheel is located on the end of the screw facing away from the prism rod. When the rod is pulled outward a certain distance, the operator needs to rotate the rotating wheel in time to make the end of the screw facing away from the rotating wheel press against the outer wall of the rod, thus fixing the rod. In use, the operator needs to pull the rod outward a specified distance. However, when pulling the rod outward, the operator needs to repeatedly check the position between the scale on the rod and the end face of the locking sleeve to determine the specified distance, making it difficult to pull the rod outward in one go. In everyday use, locking sleeves are usually made of plastic. After prolonged use, the fit between the threaded hole and the screw can loosen, and the rod may partially retract into the prism rod, thus failing to effectively fix the rod. Utility Model Content

[0005] The summary section of this application is intended to provide a brief overview of the concepts, which will be described in detail in the detailed description section below. This summary section is not intended to identify key or essential features of the claimed technical solutions, nor is it intended to limit the scope of the claimed technical solutions.

[0006] To address the technical problems mentioned in the background section, some embodiments of this application provide a prism rod positioning structure. The prism rod contains a pull-out rod body. The positioning structure includes: a positioning pin; a plurality of straight holes spaced apart on the rod body, the center lines of the straight holes being perpendicular to the center line of the rod body; the center line positions of the straight holes corresponding to the values ​​of a scale formed on the rod body; an insertion portion formed on the positioning pin; the insertion portion being used to insert into the straight holes along the center line direction, and the center line position of the positioning pin coinciding with the center line position of the straight holes; when the insertion portion is inserted into the straight holes, the outer wall surface of the positioning pin abuts against the end face of the prism rod.

[0007] Furthermore, the locating pin has a gripping rod for hand gripping at one end opposite to the insertion part; the gripping rod is rotatably connected to the locating pin; when the gripping rod rotates relative to the locating pin, the center line of the gripping rod is perpendicular to or inclined to the center line of the locating pin; the locating structure also includes: a bolt; the insertion part forms a threaded hole; the bolt is threadedly connected to the threaded hole; when the bolt is threadedly connected to the threaded hole, the center line of the bolt is perpendicular to the center line of the locating pin.

[0008] Furthermore, the positioning structure also includes: a flexible rope, a mounting sleeve, and a winding drum; the mounting sleeve is fixedly mounted on the prism rod, and the winding drum is rotatably connected to the mounting sleeve so that the winding drum can rotate relative to the mounting sleeve; the rotation axis of the winding drum is perpendicular to the axis of the prism rod; the winding drum forms a winding area for winding the flexible rope; one end of the flexible rope is connected to the gripping rod, and the other end of the flexible rope extends to the winding area and connects to the winding drum.

[0009] Furthermore, a fixing hole is formed on the winding spool; a limiting hole is formed on the mounting sleeve; the positioning pin, the gripping rod, and the flexible rope are used to pass through the fixing hole and the limiting hole so that the positioning pin is fixed on the fixing hole.

[0010] Furthermore, the winding spool is provided with a rotating rod for hand gripping at one end away from the mounting sleeve.

[0011] Furthermore, the outer wall surface of the positioning pin abuts against the end face of the prism rod, and when the gripping rod rotates relative to the positioning pin, a gap is formed between the gripping rod and the end face of the prism rod.

[0012] Furthermore, the positioning structure also includes: a connecting rod and a connecting block; the connecting block is provided at both ends of the connecting rod; the connecting block is rotatably connected to the connecting rod; threaded holes are formed at both ends of the positioning pin; the connecting block is used for threaded connection with the threaded holes.

[0013] Furthermore, the connecting rod is a flexible rod.

[0014] The beneficial effects of this application are as follows:

[0015] The straight hole is set in a position frequently used by the staff so that the staff can pull the rod out a specified distance in one go. The positioning pin is inserted into the straight hole, which can not only prevent the rod from retracting into the prism rod, but also fix the rod in case the fit between the threaded hole and the screw becomes loose. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application.

[0017] Furthermore, throughout the accompanying drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the elements are not necessarily drawn to scale.

[0018] In the attached diagram:

[0019] Figure 1 This is an overall schematic diagram based on an embodiment of this application;

[0020] Figure 2 yes Figure 1 The enlarged view of part A mainly shows the structure of the locating pin and the gripping rod;

[0021] Figure 3 This is a structural schematic diagram of a part of the embodiment, mainly showing the structure of the mounting sleeve and the winding drum;

[0022] Figure 4 This is a partially exploded view of an embodiment, mainly showing the structure of straight holes and threaded holes;

[0023] Figure 5 This is a structural schematic diagram as part of an embodiment, mainly showing the structure of the connecting rod and the connecting block.

[0024] Figure label:

[0025] 1. Prism rod; 11. Rod body; 111. Straight hole; 2. Positioning pin; 21. Insert; 211. Threaded hole; 3. Holding rod; 4. Bolt; 5. Flexible rope; 6. Mounting sleeve; 61. Limiting hole; 7. Winding spool; 71. Fixing hole; 72. Rotating rod; 8. Connecting rod; 9. Connecting block. Detailed Implementation

[0026] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0027] It should also be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other.

[0028] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0029] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0030] This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] Reference Figure 1-4 ,

[0032] A positioning structure for a prism rod 1 includes a pull-out rod body 11 inside the prism rod 1. The positioning structure includes a positioning pin 2. Multiple straight holes 111 are spaced apart on the rod body 11, with the center line of each straight hole 111 perpendicular to the center line of the rod body 11. The position of the center line of each straight hole 111 corresponds to the value of a scale formed on the rod body 11. For example, straight holes 111 are spaced 50cm apart. The straight holes 111 can also be directly positioned in frequently used locations to allow the operator to pull the rod body 11 a specified distance in one go. An insertion part 21 is formed on the positioning pin 2, and the insertion part 21 is integrally formed with the positioning pin 2. The insertion part 21 is used to insert into the straight holes 111 along the center line direction, and the center line of the positioning pin 2 coincides with the center line of the straight holes 111. The positioning pin 2 has the same diameter as the straight holes 111. When the insertion part 21 passes through the straight holes 111, the outer wall surface of the positioning pin 2 abuts against the end face of the prism rod 1. The centerline of the straight hole 111 is perpendicular to the centerline of the rod 11. When the positioning pin 2 is inserted into the straight hole 111, its outer wall surface abuts against the end face of the prism rod 1, and the positioning pin 2 coincides with the centerline of the straight hole 111. The radial contact force restricts the displacement of the rod 11, ensuring accurate pull-out length. If the diameter of the positioning pin 2 is smaller than the diameter of the straight hole 111, then after the positioning pin 2 is inserted into the straight hole 111, the outer wall surface of the positioning pin 2 will contact the end face of the prism rod 1, and the rod 11 will be affected by gravity and move towards the ground, that is, retract a small part into the prism rod 1 until the inner wall surface of the straight hole 111 contacts the outer wall surface of the positioning pin 2. This will cause the rod 11 to be pulled outward a distance smaller than the actual distance. Therefore, in this embodiment, when the positioning pin 2 is inserted into the straight hole 111, the center line position of the positioning pin 2 coincides with the center line position of the straight hole 111. When the positioning pin 2 is inserted into the straight hole 111, the rod 11 will not move towards the ground, so that the distance the rod 11 is pulled outward from the prism rod 1 is more accurate.

[0033] Specifically, the end of the positioning pin 2 opposite to the insertion part 21 is provided with a gripping rod 3 for hand gripping. The gripping rod 3 is rotatably connected to the positioning pin 2. When the gripping rod 3 rotates relative to the positioning pin 2, the center line of the gripping rod 3 is perpendicular to or inclined to the center line of the positioning pin 2. The positioning structure also includes a bolt 4. The insertion part 21 forms a threaded hole 211; the bolt 4 is threadedly connected to the threaded hole 211. When the bolt 4 is threadedly connected to the threaded hole 211, the center line of the bolt 4 is perpendicular to the center line of the positioning pin 2. After the rod body 11 is pulled outwards by a certain distance from the prism rod 1, the positioning pin 2 is inserted into the straight hole 111, which allows the gripping rod 3 to rotate relative to the positioning pin 2, so that the end of the positioning pin 2 with the gripping rod 3 cannot pass through the straight hole 111. Since the locating pin 2 matches the straight hole 111, after the bolt 4 is installed on the threaded hole 211, the bolt 4 can prevent the locating pin 2 from falling out of the straight hole 111. The end of the locating pin 2 with the threaded hole 211 will also be unable to pass through the straight hole 111, thereby fixing the locating pin 2 to the rod body 11. In this embodiment, the gripping rod 3 and the bolt 4 can also be used to assist in fixing the rod body 11 after the fixing mechanism has fixed it, so as to reduce the wear of the threaded hole formed on the locking sleeve.

[0034] Specifically, the positioning structure also includes: a flexible rope 5, a mounting sleeve 6, and a winding drum 7. In this embodiment, the flexible rope 5 is a rope. The mounting sleeve 6 is fixedly mounted on the prism rod 1, and the winding drum 7 is rotatably connected to the mounting sleeve 6, allowing the winding drum 7 to rotate relative to the mounting sleeve 6. The axis of rotation of the winding drum 7 is perpendicular to the axis of the prism rod 1. The winding drum 7 forms a winding area around the flexible rope 5. One end of the flexible rope 5 is connected to the gripping rod 3, and the other end extends to the winding area and connects to the winding drum 7. The flexible rope 5 connects the gripping rod 3 and the winding drum 7, preventing the loss of small parts such as the positioning pin 2 and bolt 4. The mounting sleeve 6 and the winding drum 7 are integrated onto the prism rod 1, reducing the need to carry additional accessories. In other embodiments, to adapt to the height requirements of different measurement scenarios (such as shortening for low-lying terrain measurement and extending for high-rise building layout), the maximum outward pulling distance of a single rod 1 is insufficient for the use of personnel. Therefore, multiple rods 11 are provided on the prism rod 1, and all multiple rods 11 can be pulled outward. In this embodiment, in order to enable the positioning pin 2 to be inserted into the straight hole 111 furthest from the prism rod 1, a flexible rope 5 and a winding drum 7 are provided, and the flexible rope 5 has a certain length. When multiple rods 11 are pulled outward from the prism rod 1, the positioning pin 2 can be inserted into the straight hole 111 formed on the rod 11. When the prism rod 1 is not in use, the flexible rope 5 can be promptly stored, and the winding drum 7 can also effectively prevent the flexible rope 5 from tangling.

[0035] Specifically, a fixing hole 71 is formed on the winding drum 7; a limiting hole 61 is formed on the mounting sleeve 6. Both the fixing hole 71 and the limiting hole 61 are through holes. The positioning pin 2, the holding rod 3, and the flexible rope 5 pass through the fixing hole 71 and the limiting hole 61 so that the holding rod 3 on the positioning pin 2 is fixed in the fixing hole 71. After use, the positioning pin 2 can pass through the fixing hole 71 and the limiting hole 61, and cooperate with the winding drum 7 to wind the flexible rope 5 to realize the storage and fixation of the positioning pin 2. The specific method is as follows: First, the positioning pin 2 is passed through the fixing hole 71 and the limiting hole 61 in sequence, so that the flexible rope 5 wraps the winding drum 7 and the mounting sleeve 6 together. Then, the positioning pin 2 is passed through the fixing hole 71 again, and one end of the positioning pin 2 with the holding rod 3 is placed in the fixing hole 71. The positioning pin 2 is manually adjusted to rotate relative to the holding rod 3 so that the outer wall surface of the positioning pin 2 can contact the end face on the mounting sleeve 6. This is used to store the positioning pin 2 and the holding rod 3. This fixing method can effectively prevent the winding drum 7 from rotating, so as to prevent the flexible rope 5 from loosening.

[0036] Specifically, the winding drum 7 has a rotating rod 72 for hand gripping at one end away from the mounting sleeve 6.

[0037] Specifically, the outer wall surface of the positioning pin 2 abuts against the end face of the prism rod 1, and when the gripping rod 3 rotates relative to the positioning pin 2, a gap is formed between the gripping rod 3 and the end face of the prism rod 1. If the outer wall surface of the gripping rod 3 could contact the end face of the prism rod 1 (the diameter of the gripping rod 3 is larger than the diameter of the positioning pin 2), it may cause a certain change in the distance that the rod 11 is pulled outward from the prism rod 1. Therefore, in this embodiment, after the gripping rod 3 rotates relative to the positioning pin 2, a gap is formed between the gripping rod 3 and the end face of the prism rod 1.

[0038] Example 2

[0039] Reference Figure 5

[0040] The difference from Embodiment 1 is that the positioning structure also includes a connecting rod 8 and a connecting block 9. Connecting blocks 9 are provided at both ends of the connecting rod 8. The connecting blocks 9 are rotatably connected to the connecting rod 8. Threaded holes 211 are formed at both ends of the positioning pin 2. An extension is formed on the end of the connecting block 9 opposite to the connecting rod 8, and threads are formed on the extension, which is threadedly connected to the threaded hole 211. The connecting rod 8 and connecting blocks 9 are used to fix the rod body 11 pulled outwards towards the prism rod 1, making operation simple.

[0041] Specifically, the connecting rod 8 is a flexible rod 11. In this embodiment, the connecting rod 8 is made of rubber.

[0042] The above description is merely a selection of preferred embodiments of this disclosure and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in the embodiments of this disclosure is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in the embodiments of this disclosure.

Claims

1. A prism bar positioning structure, characterized by, A prism rod is provided with a rod body which can be pulled outwards, and the positioning structure comprises a positioning pin; A plurality of straight holes are arranged on the rod body at intervals, the center line of the straight hole is perpendicular to the center line of the rod body, and the center line position of the straight hole corresponds to the numerical value of the scale table formed on the rod body; A plug part is formed on the positioning pin, the plug part is used for inserting into the straight hole along the center line direction of the straight hole, the center line position of the positioning pin coincides with the center line position of the straight hole, and the outer wall surface of the positioning pin abuts against the end surface of the prism rod when the plug part is inserted into the straight hole.

2. The prism rod positioning structure according to claim 1, wherein: An end of the positioning pin away from the plug part is provided with a holding rod for holding by a hand; The holding rod is rotationally connected with the positioning pin, the center line of the holding rod is perpendicular or inclined to the center line of the positioning pin when the holding rod rotates relative to the positioning pin; The positioning structure further comprises a bolt; The plug part forms a threaded hole, the bolt is threadedly connected with the threaded hole, and the center line of the bolt is perpendicular to the center line of the positioning pin when the bolt is threadedly connected with the threaded hole.

3. The prism rod positioning structure according to claim 2, wherein: The positioning structure further comprises a flexible rope body, a mounting sleeve and a winding drum; The mounting sleeve is fixedly arranged on the prism rod, the winding drum is rotationally connected with the mounting sleeve so that the winding drum can rotate relative to the mounting sleeve, and the rotation axis of the winding drum is perpendicular to the axis of the prism rod; The winding drum forms a winding area for winding the flexible rope body, one end of the flexible rope body is connected with the holding rod, and the other end of the flexible rope body extends to the winding area and is connected with the winding drum.

4. The prism rod positioning structure according to claim 3, wherein: A fixing hole is formed on the winding drum, and a limiting hole is formed on the mounting sleeve; The positioning pin, the holding rod and the flexible rope body are used for penetrating through the fixing hole and the limiting hole so that the positioning pin is fixed on the fixing hole.

5. The prism rod positioning structure according to claim 4, wherein: An end of the winding drum away from the mounting sleeve is provided with a rotating rod for holding by a hand.

6. The prism rod positioning structure according to claim 2, wherein: The outer wall surface of the positioning pin abuts against the end surface of the prism rod, and a gap is formed between the holding rod and the end surface of the prism rod when the holding rod rotates relative to the positioning pin.

7. The prism bar positioning structure of claim 1, wherein: The positioning structure further comprises a connecting rod and a connecting block; The connecting blocks are arranged at both ends of the connecting rod and are rotationally connected with the connecting rod; Threaded holes are formed at both ends of the positioning pin, and the connecting blocks are threadedly connected with the threaded holes.

8. The prism rod positioning structure according to claim 7, wherein: The connecting rod is a flexible rod body.

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