A foundation pit deformation measuring device

Abstract

The application discloses a kind of foundation pit deformation measuring devices, including pre-pressing type locking mechanism, longitudinal adjusting assembly, press unlocking mechanism and sliding stop mechanism.The application belongs to the technical field of foundation pit measurement, specifically refers to a kind of foundation pit deformation measuring device;In order to solve the technical problem that the extrusion force providing friction cannot be too large or too small, the application creatively proposes pre-pressing type locking mechanism, by the linear corresponding relationship between extrusion force and maximum static friction, the tension received by platform mounting sleeve is used as the trigger condition for increasing friction, and the technical contradiction that friction cannot be too small and cannot be too large all the time is perfectly overcome.

Description

Technical Field

[0001] This invention belongs to the field of foundation pit measurement technology, specifically referring to a foundation pit deformation measurement device. Background Technology

[0002] In the field of building construction, the measurement of foundation pit deformation requires the use of specialized measuring instruments and methods to conduct multiple observations at various measurement points. While the principles of measurement and the equipment used in the process are relatively mature, there are still areas for improvement in the overall measurement process. A: Because multiple measurements are required at multiple locations, the height of the measuring platform needs to be adjusted frequently during the measurement process; B: Traditional locking mechanisms mostly use threaded clamping. To obtain sufficient locking force and stability, sufficient compressive force is required. Therefore, manual locking and unlocking is very strenuous, and repeated operation can easily cause hand muscle soreness or even bruising. C: Threaded structures are not suitable for repeated use. Compared with other transmission structures, threaded structures are prone to damage and failure when subjected to large forces. D: When the adjusted rod is not under force, the locking mechanism also needs to continuously withstand great compressive force, which can easily accelerate the aging of parts. Summary of the Invention

[0003] To address the above issues and overcome the shortcomings of existing technologies, this invention provides a foundation pit deformation measurement device. It also proposes a lifting, positioning, and locking mechanism that is quick, convenient, labor-saving, has a long service life, and is suitable for frequent adjustments. Furthermore, to solve the technical problem that the extrusion force providing friction cannot be too large or too small, this invention creatively proposes a pre-compression locking mechanism. By utilizing the linear correspondence between the extrusion force and the maximum static friction force, and taking advantage of the tension on the platform mounting sleeve as a trigger condition to increase friction, this perfectly overcomes the technical contradiction that the friction force cannot be too small or too large indefinitely.

[0004] In order to optimize ergonomics and improve the ease and efficiency of operation, this invention also proposes a press-to-unlock mechanism, which can easily unlock by pressing and automatically reset and lock after being released. In the locked state, the connection can always be kept firm by adaptive changes in friction.

[0005] The technical solution adopted by this invention is as follows: This invention proposes a foundation pit deformation measuring device, including a pre-compression locking mechanism, a longitudinal adjustment assembly, a press-to-unlock mechanism, and a sliding stop mechanism. The pre-compression locking mechanism is located on both sides of the longitudinal adjustment assembly. Through the symmetrical arrangement of the pre-compression locking mechanism, the sliding stop mechanism can generate a sufficiently large frictional force to prevent sliding when subjected to upward or downward tension, thereby maintaining the relative stability of the platform mounting sleeve and the main support rod during use. The pre-compression locking mechanisms located on both sides of the longitudinal adjustment assembly are symmetrically distributed, and the pre-compression locking mechanism is rotatably mounted in the press-to-unlock mechanism. The press-to-unlock mechanism is located on the longitudinal adjustment assembly. When pressed, the sliding stop mechanism is unlocked, allowing easy sliding adjustment of the relative position between the platform mounting sleeve and the main support rod. After releasing the press-to-unlock mechanism, it automatically enters the locked state, making it convenient to operate and ideal for applications requiring frequent adjustments. The sliding stop mechanism is engaged within the press-to-unlock mechanism. Through its axial sliding and springback, the device automatically switches to the locked state when the pressing force is removed. Furthermore, under the action of the spring force, the device remains in a normally locked state, ensuring the stability of the connection.

[0006] Furthermore, the pre-tightening locking mechanism includes a pre-locking component and a lever-type pressurizing component. The pre-locking component is symmetrically disposed in the press-unlocking mechanism, and the lever-type pressurizing component is symmetrically disposed in the press-unlocking mechanism.

[0007] Preferably, the pre-locking assembly includes a fixed chassis, a locking brake drum, and a brake pre-tensioning spring. The brake pre-tensioning spring always tends to press the anti-slip coating against the main support rod, thereby preventing the device from sliding freely when the sliding stop mechanism is not subjected to any moving force. Furthermore, since the friction between the anti-slip coating and the main support rod increases with the increase of the tension on the platform mounting sleeve, the anti-slip coating and the main support rod can always provide friction equal to the tension before either of them fails. The fixed chassis is fixedly connected to the press-to-unlock mechanism. The fixed chassis is provided with an array of chassis sleeves. The inner wall of the locking brake drum is provided with an anti-slip coating that contacts the longitudinal adjustment component. The outer wall of the locking brake drum is also provided with an array of brake drum telescopic rods corresponding to the chassis sleeves. The brake drum telescopic rods are engaged and slidably disposed in the chassis sleeves. The brake preload spring is disposed between the fixed chassis and the locking brake drum. The top of the locking brake drum contacts the inner wall of the main body shell. When the platform mounting sleeve is subjected to tension, the strength of the main body shell can be used to prevent the chassis sleeves and brake drum telescopic rods from breaking.

[0008] As a further preferred embodiment of the present invention, the lever-type booster assembly includes a lever pin, a lever control arm, and a hollow pressure platform. The lever pin is engaged in a press-to-unlock mechanism. The lever control arm is provided with a control arm hinge ring, and the lever control arm is rotatably mounted on the lever pin via the control arm hinge ring. The two ends of the lever control arm are respectively provided with a control arm pressure rod and a control arm limiting platform. When the control arm pressure rod presses the locking brake drum, it increases the maximum static friction between the anti-slip coating and the main support rod. The control arm pressure rod, when passing through the hollow pressure platform, carries the locking brake drum away from the main support rod. When the support rod is in place, the friction between the anti-slip coating and the main support rod can be reduced to zero, thus facilitating the movement of the device. The hollow pressure platform is mounted on the locking brake drum and is rotatably mounted on the control arm pressure rod. Since the control arm pressure rod moves in an arc around the lever pin, it has displacement in both the lateral and longitudinal directions. The inner hole of the hollow pressure platform is a longitudinal elongated hole. The longitudinal play between the control arm pressure rod and the hollow pressure platform is sufficient to compensate for the longitudinal displacement of the control arm pressure rod. There is no actively designed lateral play between the control arm pressure rod and the hollow pressure platform.

[0009] Furthermore, the longitudinal adjustment component includes a main support rod and a position feedback bar. The main frame component is fixed to the outer wall of the main support rod. The locking brake drum contacts the main support rod through an anti-slip coating. Through the rolling contact between the position feedback bar and the scale wheel, the current adjustment position can be fed back through the scale wheel. One rotation of the scale wheel is a large reading unit. The position feedback bar is engraved with large measurement units, and the outer ring of the scale wheel is engraved with small reading units. The combination of the two can read the current accurate position.

[0010] The longitudinal adjustment assembly also includes a tripod support and a measuring platform. The tripod support is clamped to the bottom of the main support rod, and the measuring platform is provided with an elbow bracket. The measuring platform is clamped to the end of the sliding stop mechanism via the elbow bracket.

[0011] Furthermore, the press-to-unlock mechanism includes a main frame assembly and a press-to-unlock assembly, the press-to-unlock assembly being slidably disposed on the main frame assembly, and the lever control arm being rotatably disposed on the main frame assembly.

[0012] Preferably, the main frame assembly includes a main shell, a handle, and a scale wheel. The main shell has a longitudinally penetrating frustum with a diameter larger than that of the main support rod. The main support rod is located in the longitudinally penetrating frustum. The longitudinally penetrating frustum has a penetrating notch. The position feedback bar is located in the frustum notch. One end of the main shell also has a shell end frustum. The two sides of the main shell have a penetrating side center sliding hole one and a side symmetrical sliding hole two. The lever pin is fixed to the side of the main shell. One side of the main shell also has a scale wheel window. The handle is fixed to the other end of the main shell. The scale wheel is rotatably located in the scale wheel window. The scale wheel and the position feedback bar are in rolling contact. The position of the main shell can be adjusted by sliding the main frame assembly along the main support rod, thereby adjusting the sliding stop mechanism.

[0013] As a further preferred embodiment of the present invention, the press-to-unlock assembly includes an unlocking press bracket, a spring support, and a bracket return spring. The unlocking press bracket is provided with a horizontal top rod, which is engaged and slidably disposed in a central sliding hole on the side. The unlocking press bracket is also symmetrically provided with control arm levers, which are engaged and slidably disposed in symmetrical sliding holes on the side. The unlocking press bracket is also provided with a bracket guide portion and a bracket pressing portion. The spring support is symmetrically disposed on both sides of the main body shell and is fixedly connected to the main body shell. The spring support is provided with a support guide hole, and the bracket guide portion is engaged and slidably disposed in the support guide hole. The bracket return spring is disposed between the spring support and the unlocking press bracket. When the unlocking press bracket is pressed, on the one hand, the lever control arm can be unlocked by pushing the square locking block through the horizontal top rod; on the other hand, since the control arm lever is still a certain distance away from the lever control arm in its natural state, the lever control arm can be moved only after the square locking block has completely slid off.

[0014] Furthermore, the sliding stop mechanism includes a lifting component and a self-resetting locking component. The lifting component is engaged in the end frustum of the outer shell, and the end frustum of the outer shell has a certain elasticity. The self-resetting locking component is engaged and slidably disposed in the lifting component.

[0015] Preferably, the lifting assembly includes a platform mounting sleeve and a guide limiting sleeve, wherein the platform mounting sleeve is fitted into the frustum at the end of the outer shell, and the guide limiting sleeve is fitted into the platform mounting sleeve.

[0016] As a further preferred embodiment of the present invention, the self-resetting locking assembly includes a spring mounting plate, a locking block spring, and a square locking block. The spring mounting plate is engaged in the platform mounting sleeve, and the square locking block is engaged and slidably disposed in the guide limiting sleeve. The locking block spring is disposed between the spring mounting plate and the square locking block. Through the elastic force of the locking block spring on the square locking block, the device can be automatically switched back to the locking state by the automatic rebound of the square locking block after the active pressing pressure is removed. By setting an angle on the control arm limiting platform and the square locking block, the fault tolerance rate when the square locking block is reset can be improved, and the end collision between the square locking block and the control arm limiting platform can be avoided.

[0017] The beneficial effects achieved by the present invention using the above structure are as follows: (1) Through the symmetrically arranged pre-compression locking mechanism, the sliding stop mechanism can generate a sufficiently large frictional force to prevent sliding when subjected to upward or downward tension, thereby maintaining the relative stability of the platform mounting sleeve and main support rod position during use; (2) The sliding stop mechanism can be unlocked when the pressing mechanism is pressed. At this time, the relative position between the platform mounting sleeve and the main support rod can be easily adjusted by sliding. After the pressing mechanism is released, it can automatically enter the locking state. It is convenient to operate and very suitable for use scenarios that require frequent adjustment. (3) By sliding and rebounding the sliding stop mechanism, the device can be automatically switched to the locked state when the pressing force is removed, and the device is in the normally locked state under the action of the spring force, thereby ensuring the stability of the connection and fixation. (4) The brake preload spring always tends to press the anti-slip coating against the main support rod, thereby avoiding the problem that the device may slide freely when the sliding stop mechanism is not subjected to moving force; and since the friction between the anti-slip coating and the main support rod increases with the increase of the tension on the platform mounting sleeve, the anti-slip coating and the main support rod can always provide friction equal to the tension before they are damaged and fail. (5) Locking the top of the brake drum and the inner wall of the main body shell can prevent the chassis sleeve and brake drum telescopic rod from breaking when the platform mounting sleeve is subjected to tension through the strength of the main body shell; (6) When the control arm pressure rod is pressing the locking brake drum, it can increase the maximum static friction between the anti-slip coating and the main support rod. When the control arm pressure rod carries the locking brake drum away from the main support rod through the hollow pressure table, it can reduce the friction between the anti-slip coating and the main support rod to zero, thereby facilitating the movement of this device. (7) Since the control arm lever moves in an arc around the lever pin, the control arm lever has displacement in both the lateral and longitudinal directions. The inner hole of the hollow pressure table is a longitudinal elongated hole. The longitudinal clearance between the control arm lever and the hollow pressure table is sufficient to compensate for the longitudinal displacement of the control arm lever. There is no actively set lateral clearance between the control arm lever and the hollow pressure table. (8) Through the rolling contact between the position feedback bar and the scale wheel, the current adjustment position can be fed back through the scale wheel. One rotation of the scale wheel is a large reading unit. The position feedback bar is engraved with large measurement units, and the outer ring of the scale wheel is engraved with small reading units. The combination of the two can read the current accurate position. (9) The position of the main body shell can be adjusted by sliding the main frame assembly along the main support rod, thereby adjusting the sliding stop mechanism; (10) When pressing to unlock the pressing bracket, on the one hand, the lever control arm can be unlocked by pushing the square locking block through the horizontal top rod. On the other hand, since the control arm lever is still a certain distance away from the lever control arm in the natural state, the lever control arm can be moved only after the square locking block has completely slid off, thus avoiding accidental contact. (11) By using the spring force of the locking block spring on the square locking block, the device can be automatically switched back to the locking state by the automatic rebound of the square locking block after the active pressing pressure is removed. By setting the angle on the control arm limit platform and the square locking block, the fault tolerance rate when the square locking block is reset can be improved, and the situation of end collision between the square locking block and the control arm limit platform can be avoided. Attached Figure Description

[0018] Figure 1 This is a perspective view of a foundation pit deformation measuring device proposed in this invention; Figure 2 This is a front view of a foundation pit deformation measuring device proposed in this invention; Figure 3 This is a top view of a foundation pit deformation measuring device proposed in this invention; Figure 4 for Figure 2 A cross-sectional view along the cutting line AA; Figure 5 for Figure 4 A cross-sectional view along the cutting line BB; Figure 6 for Figure 5 A cross-sectional view along the section line CC; Figure 7 for Figure 4 A cross-sectional view along the cutting line DD; Figure 8This is a schematic diagram of the pre-compression locking mechanism of a foundation pit deformation measuring device proposed in this invention; Figure 9 This is a schematic diagram of the longitudinal adjustment component of a foundation pit deformation measuring device proposed in this invention; Figure 10 This is a schematic diagram of the pressing and unlocking mechanism of a foundation pit deformation measuring device proposed in this invention; Figure 11 This is a schematic diagram of the sliding stop mechanism of a foundation pit deformation measuring device proposed in this invention; Figure 12 for Figure 5 A magnified view of a section at point I; Figure 13 for Figure 4 A magnified view of section II in the middle.

[0019] The components include: 1. Pre-tightening locking mechanism; 2. Longitudinal adjustment assembly; 3. Press-to-unlock mechanism; 4. Sliding stop mechanism; 5. Pre-locking assembly; 6. Lever-type booster assembly; 7. Fixed chassis; 8. Locking brake drum; 9. Brake pre-tightening spring; 10. Lever pin; 11. Lever control arm; 12. Hollow pressure platform; 13. Chassis sleeve; 14. Anti-slip coating; 15. Brake drum telescopic rod; 16. Control arm hinge ring; 17. Control arm pressure rod; 18. Control arm limit platform; 19. Main support rod; 20. Position feedback bar; 21. Main frame assembly; 22. Press-to-unlock assembly; 23. Main shell; 24. Handle grip; 25. Scale code. 26. Wheel, 27. Unlocking and pressing bracket, 28. Spring support, 29. Bracket return spring, 30. Longitudinal through-type frustum, 31. Frustum notch, 32. End frustum of outer shell, 33. Side center sliding hole one, 34. Side symmetrical sliding hole two, 35. Code wheel window, 36. Horizontal top rod, 37. Control arm lever, 38. Bracket guide part, 39. Bracket pressing part, 40. Support guide hole, 41. Lifting assembly, 42. Self-resetting locking assembly, 43. Platform mounting sleeve, 44. Guide limit sliding sleeve, 45. Spring mounting plate, 46. Locking block spring, 47. Square locking block, 48. Tripod support, 49. Measuring platform, 40. Elbow bracket.

[0020] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0022] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0023] like Figures 1-13 As shown, this invention proposes a foundation pit deformation measuring device, including a pre-tightening locking mechanism 1, a longitudinal adjustment assembly 2, a press-to-unlock mechanism 3, and a sliding stop mechanism 4. The pre-tightening locking mechanism 1 is located on both sides of the longitudinal adjustment assembly 2. Through the symmetrical arrangement of the pre-tightening locking mechanisms 1, the sliding stop mechanism 4 can generate a sufficiently large frictional force to prevent sliding when subjected to upward or downward tension, thereby maintaining the relative stability of the platform mounting sleeve 42 and the main support rod 19 during use. The pre-tightening locking mechanisms 1 located on both sides of the longitudinal adjustment assembly 2 are symmetrically distributed, and the pre-tightening locking mechanisms 1 are rotatably mounted in the press-to-unlock mechanism 3. Mechanism 3 is located on the longitudinal adjustment component 2. By pressing the unlocking mechanism 3, the sliding stop mechanism 4 can be unlocked when pressed. At this time, the relative position between the platform mounting sleeve 42 and the main support rod 19 can be easily adjusted by sliding. After releasing the unlocking mechanism 3, it can automatically enter the locked state. It is convenient to operate and very suitable for application scenarios that require frequent adjustment. The sliding stop mechanism 4 is locked in the unlocking mechanism 3. By sliding and rebounding the sliding stop mechanism 4 axially, the device can be automatically switched to the locked state when the pressing force is removed. Under the action of the spring force, the device is in the normally locked state, thereby ensuring the stability of the connection and fixation.

[0024] The press-to-unlock mechanism 3 includes a main frame assembly 21 and a press-to-unlock assembly 22. The press-to-unlock assembly 22 is slidably disposed on the main frame assembly 21, and the lever control arm 11 is rotatably disposed on the main frame assembly 21.

[0025] The main frame assembly 21 includes a main shell 23, a handle 24, and a scale wheel 25. The main shell 23 has a longitudinally penetrating frustum 29 with a diameter larger than that of the main support rod 19. The main support rod 19 is located in the longitudinally penetrating frustum 29. The longitudinally penetrating frustum 29 has a penetrating frustum notch 30. The position feedback bar 20 is located in the frustum notch 30. One end of the main shell 23 also has a shell end frustum 31. The two sides of the main shell 23 have a penetrating side center sliding hole 32 and a side symmetrical sliding hole 33. The lever pin 10 is fixed to the side of the main shell 23. One side of the main shell 23 also has a scale wheel window 34. The handle 24 is fixed to the other end of the main shell 23. The scale wheel 25 is rotatably located in the scale wheel window 34. The scale wheel 25 and the position feedback bar 20 are in rolling contact. The position of the main shell 23 can be adjusted by sliding the main frame assembly 21 along the main support rod 19, thereby adjusting the sliding stop mechanism 4.

[0026] The press-to-unlock assembly 22 includes an unlocking press bracket 26, a spring support 27, and a bracket return spring 28. The unlocking press bracket 26 has a horizontal push rod 35, which is engaged and slidably disposed in a central sliding hole 32 on the side. The unlocking press bracket 26 also has symmetrically arranged control arm levers 36, which are engaged and slidably disposed in symmetrical sliding holes 33 on the side. The unlocking press bracket 26 also has a bracket guide portion 37 and a bracket pressing portion 38. The spring support 27 is symmetrically arranged on both sides of the main body shell 23, and the spring support 27 and the main body shell 23 are fixedly... Next, the spring support 27 is provided with a support guide hole 39, and the bracket guide part 37 is engaged and slidably disposed in the support guide hole 39. The bracket reset spring 28 is disposed between the spring support 27 and the unlocking pressing bracket 26. When the unlocking pressing bracket 26 is pressed, on the one hand, the lever control arm 11 can be unlocked by pushing the square locking block 46 through the horizontal top rod 35. On the other hand, since the control arm lever 36 is still a certain distance away from the lever control arm 11 in the natural state, the lever control arm 11 can be moved only after the square locking block 46 has completely slipped off.

[0027] The sliding stop mechanism 4 includes a lifting component 40 and a self-resetting locking component 41. The lifting component 40 is engaged in the frustum 31 at the end of the outer shell, and the self-resetting locking component 41 is engaged in and slidably disposed in the lifting component 40.

[0028] The lifting assembly 40 includes a platform mounting sleeve 42 and a guide limiting sleeve 43. The platform mounting sleeve 42 is fitted into the frustum 31 at the end of the outer shell, and the guide limiting sleeve 43 is fitted into the platform mounting sleeve 42.

[0029] The self-resetting locking assembly 41 includes a spring mounting plate 44, a locking block spring 45, and a square locking block 46. The spring mounting plate 44 is engaged in the platform mounting sleeve 42, and the square locking block 46 is engaged and slidably disposed in the guide limiting sleeve 43. The locking block spring 45 is disposed between the spring mounting plate 44 and the square locking block 46. Through the elastic force of the locking block spring 45 on the square locking block 46, the device can automatically switch back to the locked state by the automatic rebound of the square locking block 46 after the active pressing pressure is removed. By setting the bevel on the control arm limiting platform 18 and the square locking block 46, the fault tolerance rate of the square locking block 46 during reset can be improved, and the end collision between the square locking block 46 and the control arm limiting platform 18 can be avoided. The pre-tightening locking mechanism 1 includes a pre-locking assembly 5 and a lever-type pressure boosting assembly 6. The pre-locking assembly 5 is symmetrically disposed in the press-unlocking mechanism 3, and the lever-type pressure boosting assembly 6 is symmetrically disposed in the press-unlocking mechanism 3.

[0030] The pre-locking assembly 5 includes a fixed chassis 7, a locking brake drum 8, and a brake pre-tensioning spring 9. The brake pre-tensioning spring 9 always tends to press the anti-slip coating 14 against the main support rod 19, thereby preventing the device from sliding freely when the sliding stop mechanism 4 is not subjected to any moving force. Furthermore, since the friction between the anti-slip coating 14 and the main support rod 19 increases with the increase of the tension on the platform mounting sleeve 42, the anti-slip coating 14 and the main support rod 19 can always provide friction equal to the tension before they fail. The fixed chassis 7 is fixedly connected to the press-to-unlock mechanism 3. The chassis sleeve 13 is arranged on the upper array. The inner wall of the locking brake drum 8 is provided with an anti-slip coating 14 that contacts the longitudinal adjustment component 2. The outer wall of the locking brake drum 8 is also provided with a brake drum telescopic rod 15 corresponding to the chassis sleeve 13. The brake drum telescopic rod 15 is engaged and slidably disposed in the chassis sleeve 13. The brake preload spring 9 is disposed between the fixed chassis 7 and the locking brake drum 8. The top of the locking brake drum 8 contacts the inner wall of the main body shell 23. When the platform mounting sleeve 42 is subjected to tension, the strength of the main body shell 23 can be used to prevent the chassis sleeve 13 and the brake drum telescopic rod 15 from breaking.

[0031] The lever-type booster assembly 6 includes a lever pin 10, a lever control arm 11, and a hollow pressure platform 12. The lever pin 10 is engaged in the press-unlock mechanism 3. The lever control arm 11 is provided with a control arm hinge ring 16. The lever control arm 11 is rotatably mounted on the lever pin 10 through the control arm hinge ring 16. The two ends of the lever control arm 11 are respectively provided with a control arm pressure rod 17 and a control arm limiting platform 18. When the control arm pressure rod 17 compresses the locking brake drum 8, it can increase the maximum static friction between the anti-slip coating 14 and the main support rod 19. The control arm pressure rod 17, when passing through the hollow pressure platform 12, carries the locking brake drum 8 away from the main support rod 19. At 9 o'clock, the friction between the anti-slip coating 14 and the main support rod 19 can be reduced to zero, thus facilitating the movement of the device; the hollow pressure platform 12 is set on the locking brake drum 8, and the hollow pressure platform 12 is rotatably set on the control arm pressure rod 17. Since the control arm pressure rod 17 moves in an arc around the lever pin 10, the control arm pressure rod 17 has displacement in both the lateral and longitudinal directions. The inner hole of the hollow pressure platform 12 is a longitudinal elongated hole. The longitudinal play between the control arm pressure rod 17 and the hollow pressure platform 12 is sufficient to compensate for the longitudinal displacement of the control arm pressure rod 17. There is no actively set lateral play between the control arm pressure rod 17 and the hollow pressure platform 12.

[0032] The longitudinal adjustment component 2 includes a main support rod 19 and a position feedback bar 20. The main frame component 21 is fixed to the outer wall of the main support rod 19. The locking brake drum 8 contacts the main support rod 19 through the anti-slip coating 14. Through the rolling contact between the position feedback bar 20 and the scale wheel 25, the current adjustment position can be fed back through the scale wheel 25. One rotation of the scale wheel 25 is a large reading unit. The position feedback bar 20 is engraved with large measurement units, and the outer ring of the scale wheel 25 is engraved with small reading units. The combination of the two can read the current accurate position.

[0033] The longitudinal adjustment assembly 2 also includes a tripod support 47 and a measuring platform 48. The tripod support 47 is attached to the bottom of the main support rod 19. The measuring platform 48 is provided with an elbow bracket 49. The measuring platform 48 is attached to the end of the sliding stop mechanism 4 through the elbow bracket 49.

[0034] In actual use, the main support rod 19 is fixed. When the platform mounting sleeve 42 is subjected to an upward or downward pulling force, the square locking block 46 will tend to move with the main body shell 23 because the frustum 31 at the end of the outer shell has a certain elasticity. At this time, the square locking block 46 squeezes the control arm limiting platform 18 in the direction of the pulling force it receives, and then the squeezing force is transmitted to the locking brake drum 8 through the rotational movement of the lever control arm 11, becoming the squeezing force between the anti-slip coating 14 and the main support rod 19. As the tension on the platform mounting sleeve 42 increases, the maximum static friction between the anti-slip coating 14 and the main support rod 19 also increases continuously, and the changes of the two are proportional. Therefore, the anti-slip coating 14 and the main support rod 19 can always provide friction equal to the tension before they fail. Since the pre-locking assembly 5 and the lever-type pressurizing assembly 6 are symmetrically arranged, the stability of the relative position between the platform mounting sleeve 42 and the main support rod 19 can be guaranteed, whether the platform mounting sleeve 42 is in a natural state under its own weight or under a tensile force along the direction of the main support rod 19. When adjustment is needed, simply hold the handle 24 with four fingers and press down the support pressing part 38 with the heel of your palm to release the locking state of the device. When the support pressing part 38 is pressed, the square locking block 46 is first squeezed into the guide limiting sleeve 43 by the horizontal top rod 35. At this time, the locking block spring 45 is compressed. After the square locking block 46 completely disengages from the control arm limiting platform 18 and releases the limit on the lever control arm 11, the control arm lever 36 will also touch the lever control arm 11. Continuing to press, the rotation of the lever control arm 11 will cause the locking brake drum 8 to leave the main support rod 19. At this time, the device can be slid to adjust the height and position. During the sliding process, because the gap between the longitudinal through-circuit 29 and the main support rod 19 is small, the position feedback bar 20 and the scale wheel 25 are always in rolling contact. By reading the readings on the position feedback bar 20 and the scale wheel 25, the specific values ​​of the current height and position can be known. After the release of the unlocking and pressing bracket 26, the locking brake drum 8 rebounds and adheres to the main support rod 19 under the action of the brake preload spring 9, and the square locking block 46 rebounds and engages between the two sets of control arm limit platforms 18 under the action of the locking block spring 45, automatically completing the locking and fixing.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

[0037] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A device for measuring the deformation of a foundation pit, characterized in that: The device includes a pre-tightening locking mechanism (1), a longitudinal adjustment assembly (2), a press-to-unlock mechanism (3), and a sliding stop mechanism (4). The pre-tightening locking mechanism (1) is located on both sides of the longitudinal adjustment assembly (2), and the pre-tightening locking mechanisms (1) on both sides of the longitudinal adjustment assembly (2) are symmetrically distributed. The pre-tightening locking mechanism (1) is rotatably disposed in the press-to-unlock mechanism (3), and the press-to-unlock mechanism (3) is located on the longitudinal adjustment assembly (2). The sliding stop mechanism (4) is engaged in the press-to-unlock mechanism (3). The pre-tightening locking mechanism (1) includes a pre-locking assembly (5) and a lever-type pressurizing assembly (6). The pre-locking assembly (5) is symmetrically disposed in the press-to-unlock mechanism (3), and the lever-type pressurizing assembly (6) is symmetrically disposed in the press-to-unlock mechanism (3). The pre-locking assembly (5) includes a fixed chassis (7), a locking brake drum (8), and a brake pre-tensioning spring (9). The fixed chassis (7) is fixed to the pressing unlocking mechanism (3). The fixed chassis (7) is provided with a chassis sleeve (13) in an array. The inner wall of the locking brake drum (8) is provided with a non-slip coating (14) that contacts the longitudinal adjustment assembly (2). The outer wall of the locking brake drum (8) is also provided with a brake drum telescopic rod (15) corresponding to the chassis sleeve (13). The brake drum telescopic rod (15) is engaged and slidably disposed in the chassis sleeve (13). The brake pre-tensioning spring (9) is disposed between the fixed chassis (7) and the locking brake drum (8). The lever-type booster assembly (6) includes a lever pin (10), a lever control arm (11), and a hollow pressure plate (12). The lever pin (10) is engaged in the press-unlock mechanism (3). The lever control arm (11) is provided with a control arm hinge ring (16). The lever control arm (11) is rotatably mounted on the lever pin (10) through the control arm hinge ring (16). The two ends of the lever control arm (11) are respectively provided with a control arm pressure rod (17) and a control arm limiting platform (18). The hollow pressure plate (12) is mounted on the locking brake drum (8). The hollow pressure plate (12) is rotatably mounted on the control arm pressure rod (17). The longitudinal adjustment assembly (2) includes a main support rod (19) and a position feedback bar (20). The main frame assembly (21) is fixed to the outer wall of the main support rod (19). The locking brake drum (8) contacts the main support rod (19) through the anti-slip coating (14). The longitudinal adjustment assembly (2) also includes a tripod support (47) and a measuring platform (48). The tripod support (47) is engaged with the bottom of the main support rod (19). The measuring platform (48) is provided with a bend bracket (49). The measuring platform (48) is engaged with the end of the sliding stop mechanism (4) through the bend bracket (49). The press-to-unlock mechanism (3) includes a main frame assembly (21) and a press-to-unlock assembly (22). The press-to-unlock assembly (22) is slidably disposed on the main frame assembly (21), and the lever control arm (11) is rotatably disposed on the main frame assembly (21). The main frame assembly (21) includes a main shell (23), a handle (24), and a scale wheel (25). The main shell (23) has a longitudinally penetrating frustum (29) with a diameter larger than that of the main support rod (19). The main support rod (19) is located in the longitudinally penetrating frustum (29). The longitudinally penetrating frustum (29) has a penetrating frustum notch (30). The position feedback bar (20) is located in the frustum notch (30). One end of the main shell (23) also has a shell end. The truncated cone (31) has a through-hole center sliding hole (32) and a symmetrical sliding hole (33) on both sides of the main body shell (23). The lever pin (10) is fixed to the side of the main body shell (23). The main body shell (23) also has a code wheel window (34) on one side. The handle (24) is fixed to the other end of the main body shell (23). The scale code wheel (25) is rotatably disposed in the code wheel window (34). The scale code wheel (25) and the position feedback bar (20) are in rolling contact. The press-to-unlock assembly (22) includes an unlock-to-unlock press bracket (26), a spring support (27), and a bracket return spring (28). The unlock-to-unlock press bracket (26) is provided with a horizontal top rod (35), which is engaged and slidably disposed in a central sliding hole (32) on the side. The unlock-to-unlock press bracket (26) is also symmetrically provided with control arm levers (36), which are engaged and slidably disposed in symmetrical sliding holes (33) on the side. The frame (26) is also provided with a bracket guide part (37) and a bracket pressing part (38). The spring support (27) is symmetrically arranged on both sides of the main body shell (23). The spring support (27) and the main body shell (23) are fixedly connected. The spring support (27) is provided with a support guide hole (39). The bracket guide part (37) is engaged and slidably arranged in the support guide hole (39). The bracket reset spring (28) is arranged between the spring support (27) and the unlocking pressing bracket (26). The sliding stop mechanism (4) includes a lifting assembly (40) and a self-resetting locking assembly (41). The lifting assembly (40) is engaged in the frustum (31) at the end of the outer shell, and the self-resetting locking assembly (41) is engaged and slidably disposed in the lifting assembly (40).

2. The foundation pit deformation measuring device according to claim 1, characterized in that: The lifting assembly (40) includes a platform mounting sleeve (42) and a guide limiting sleeve (43). The platform mounting sleeve (42) is fitted into the frustum (31) at the end of the outer shell. The guide limiting sleeve (43) is fitted into the platform mounting sleeve (42). The measuring platform (48) is fitted into the end of the platform mounting sleeve (42) via a bend bracket (49).

3. The foundation pit deformation measuring device according to claim 2, characterized in that: The self-resetting locking assembly (41) includes a spring mounting plate (44), a locking block spring (45), and a square locking block (46). The spring mounting plate (44) is engaged in the platform mounting sleeve (42), the square locking block (46) is engaged and slidably disposed in the guide limiting sleeve (43), and the locking block spring (45) is disposed between the spring mounting plate (44) and the square locking block (46).

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