Hydraulic wrench capable of cyclically counting

Abstract

The utility model discloses a hydraulic wrench capable of counting circularly, and belongs to the technical field of hydraulic wrenches. The counting device comprises a shell and a hydraulic driving mechanism arranged in the shell, a counting mechanism is arranged in the shell and comprises a box body, a counter and a push rod, and the counter and the push rod are arranged in the box body; wherein the counter is a rotary counter, and a first adapter is arranged on a rotating shaft of the counter; a second adapter matched with the first adapter is arranged on the push rod; the push rod is pushed by the driving shaft of the hydraulic driving mechanism to enable the two conversion connectors to extrude each other so as to drive the rotating shaft to rotate, and one-time counting is completed. According to the utility model, not only can the use times of the hydraulic wrench be recorded in real time, but also the counting mechanism adopts a mechanical structure, so that the requirement on the use environment can be effectively reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic wrenches, and more specifically relates to a hydraulic wrench capable of cycle counting. Background Art

[0002] Hydraulic wrenches are standard hydraulic torque wrench kits used to apply preload torque to industrial bolted connections for precise pre-tightening. They can also be used for bolt removal. They are widely used in bolt connection applications in power generation (nuclear power, wind power, hydropower, and thermal power), shipbuilding, metallurgy, transportation, cement, construction, aviation, and other fields.

[0003] Hydraulic wrenches generally have a certain service life. To maximize their lifespan, they are typically maintained and serviced regularly. However, due to the varying frequency of use among different users, it can be difficult to accurately determine the right time for maintenance. Therefore, accurately determining the right time for maintenance is crucial for practical production.

[0004] Using the actual number of times a hydraulic wrench has been operated as a criterion for determining when maintenance is necessary is a more reasonable approach. For example, patent CN117733784A discloses a device and method for counting hydraulic wrenches in sections. The application includes a housing and a drive shaft, which is rotatably disposed within the housing. The housing also includes a ratchet drive assembly capable of driving the drive shaft to rotate and tighten a bolt, and a hydraulic telescopic assembly capable of rotating the ratchet drive assembly. A full reciprocating stroke of the connecting rod in the hydraulic telescopic assembly is counted as 1, and a half reciprocating stroke of the connecting rod in the hydraulic telescopic assembly is counted as 0.5. The hydraulic wrench also includes a counting assembly and a digital terminal. This application accurately counts the number of times a hydraulic wrench has been operated, using the counted number of operations as a basis for maintenance. This ensures that the hydraulic wrench's internal components are worn to the point where they require replacement, effectively preventing damage and reducing unnecessary resource waste. However, the application actually uses a signal to trigger the counting function, which has certain limitations. For example, it is not suitable for use in high temperature, high humidity, and strong magnetic field conditions. At the same time, when used in underwater environments, higher requirements are placed on the sealing and waterproof performance of electronic components. Utility Model Content

[0005] 1. Problems to be solved

[0006] In view of at least some of the problems existing in the above prior art, the present invention proposes a hydraulic wrench with cycle counting, which aims to solve the problem that the existing hydraulic wrench cannot well judge the maintenance timing.

[0007] 2. Technical solution

[0008] In order to solve the above problems, the technical solutions adopted by the present invention are as follows:

[0009] The utility model discloses a hydraulic wrench capable of cycle counting, comprising a housing and a hydraulic drive mechanism arranged in the housing, wherein a counting mechanism is arranged in the housing, and the counting mechanism comprises a box body, a counter arranged in the box body, and a push rod;

[0010] Wherein, the counter is a rotary counter, and a first conversion head is provided on the rotating shaft of the counter;

[0011] The push rod is provided with a second conversion head that cooperates with the first conversion head; under the push of the driving shaft of the hydraulic drive mechanism, the push rod causes the two conversion joints to squeeze each other to drive the rotating shaft to rotate and complete one count.

[0012] Furthermore, the first conversion head is provided with an inclined surface on both sides facing the end of the second conversion head. The second conversion head is a V-shaped groove opened at the end of the push rod, and the V-shaped groove and the first conversion head are staggered at a certain phase.

[0013] Furthermore, the push rod is provided with a convex ring, and the driving shaft of the hydraulic driving mechanism is provided with an extrusion portion for extruding the convex ring.

[0014] Furthermore, two mutually connected limit spaces are provided in the box body; wherein, the counter is located in the first limit space; the main body of the push rod and the convex ring thereon are located in the second limit space, and the side of the second limit space is provided with a through hole for the end of the push rod away from the second conversion head to pass freely; the push rod sleeve is provided with a spring, which is limited between the convex ring and the inner wall of the second limit space.

[0015] Furthermore, a guide groove is provided inside the push rod, and the free end of the rotating shaft extends into the guide groove.

[0016] Furthermore, a mounting groove for accommodating the box body is provided on the top of the inner cavity of the shell, and a fastening hole for fixing the box body and an observation port for observing the counting quantity are opened on the top of the shell.

[0017] 3. Beneficial effects

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] (1) The utility model provides a hydraulic wrench capable of cycle counting. By setting a counting mechanism, the number of times the hydraulic wrench is used can be recorded in real time. The maintenance time of the wrench can be determined based on the counting result, thereby helping to extend the service life of the wrench and the safety factor of use. At the same time, compared with the signal counting method relying on electronic equipment, the counting mechanism adopts a mechanical structure, which can effectively reduce the requirements for the use environment. In addition, by setting the counting mechanism inside the shell, the counting mechanism can be well protected.

[0020] (2) The utility model is a hydraulic wrench capable of cycle counting, wherein a bevel is provided on each side of the end of the first conversion head, and a V-shaped groove is provided on the end of the second conversion head, and the V-shaped groove and the bevel of the end of the first conversion head are staggered, so that the linear motion of the push rod can be converted into the rotational motion of the rotating shaft to perform one count.

[0021] (3) The utility model provides a hydraulic wrench capable of cycle counting. A spring is provided on the push rod sleeve. The starting pressure of the counter can be controlled by adjusting the spring force to ensure that the counter counts only when there is actual load, thereby avoiding counting when the hydraulic wrench is unloaded, thereby being able to more truly reflect the actual number of working times of the hydraulic wrench. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural diagram of a hydraulic wrench capable of cycle counting according to the present invention;

[0023] Figure 2 This is a schematic diagram of the internal structure of a hydraulic wrench capable of cycle counting according to the present invention;

[0024] Figure 3 It is a structural diagram of the counting mechanism in the utility model;

[0025] Figure 4 Schematic diagram of the internal structure of the counting mechanism in the present invention;

[0026] Figure 5 This is a structural diagram of the counting mechanism of the present invention after removing the box body.

[0027] In the figure: 1, housing; 11, fastening hole; 12, observation port; 2, hydraulic drive mechanism; 21, extrusion part;

[0028] 3. Counting mechanism; 31. Box; 311. First limiting space; 312. Second limiting space; 32. Counter; 321. Rotating shaft; 322. First conversion head; 33. Push rod; 331. Second conversion head; 332. Raised ring; 333. Guide groove; 34. Spring;

[0029] 4. Oil supply mechanism; 5. Transmission mechanism; 6. Reaction arm. DETAILED DESCRIPTION

[0030] In order to further understand the content of the present invention, the present invention is described in detail with reference to the accompanying drawings.

[0031] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] The present invention will be further described below in conjunction with specific embodiments.

[0033] A hydraulic wrench capable of cycle counting in this embodiment includes a wrench body and a counting mechanism 3, wherein the counting mechanism 3 is located in the wrench body and is used to record the working count of the hydraulic wrench in real time, so as to provide a reference basis for the maintenance timing and service life of the hydraulic wrench.

[0034] Specifically, if Figure 1 、 Figure 2 As shown, the wrench body primarily comprises a housing 1, a hydraulic drive mechanism 2, an oil supply mechanism 4, a transmission mechanism 5, and a reaction arm 6. The oil supply mechanism 4, located above the housing 1, is used to supply and return oil to the hydraulic drive mechanism 2. The hydraulic drive mechanism 2 and transmission mechanism 5 are located within the housing 1. The hydraulic drive mechanism 2 drives the transmission mechanism 5 to rotate, thereby providing power to the hydraulic wrench's delivery end. The reaction arm 6, located at the end of the housing 1, is used to overcome the reaction force experienced by the hydraulic wrench during use.

[0035] refer to Figure 3 As shown, the counting mechanism 3 comprises a housing 31, a counter 32 disposed within the housing 31, and a push rod 33. A mounting slot for accommodating the housing 31 is provided at the top of the housing 1. Corresponding fastening holes 11 are provided in the top of the housing 1 and the housing 31. Locking members (e.g., locking bolts) secure the housing 31 laterally within the housing 1, positioned above the drive shaft of the hydraulic drive mechanism 2. An observation port 12 is also provided at the top of the housing 1 for viewing the counted quantity of the counter 32.

[0036] refer to Figure 4 、 Figure 5As shown, the counter 32 is a rotary counter. A first conversion head 322 is provided on the rotating shaft 321 of the counter 32. A second conversion head 331 is provided at the end of the push rod 33 near the rotating shaft 321. During operation, the push rod 33, driven by the drive shaft of the hydraulic drive mechanism 2, drives the second conversion head 331 toward the first conversion head 322, ultimately squeezing the first conversion head 322 and converting the horizontal motion of the push rod 33 into rotational motion of the rotating shaft 321, completing one count.

[0037] In this embodiment, as an implementation method formed by the cooperation between the first conversion head 322 and the second conversion head 331, the first conversion head 322 is a cylindrical structure mounted on the rotating shaft 321. The cylindrical structure has inclined surfaces symmetrically arranged on both sides of the end of the second conversion head 331. The end of the push rod 33 near the rotating shaft 321 is provided with a V-shaped groove into which the inclined surface of the first conversion head 322 can be inserted. This V-shaped groove forms the aforementioned second conversion head 331. At the same time, the inner inclined surface of the V-shaped groove is staggered with the outer inclined surface of the first conversion head 322 to ensure that when the two conversion heads are pressed against each other, they can drive the rotating shaft 321 to rotate.

[0038] Furthermore, the housing 31 is provided with a first confined space 311 and a second confined space 312, which are arranged on the left and right sides and are interconnected. The counter 32 is installed in the first confined space 311. The main body of the push rod 33 is located in the second confined space 312, and the end of the push rod 33, away from the counter 32, extends through the side wall of the second confined space 312 and along the outside of the housing 31.

[0039] A protruding ring 332 is provided on the push rod 33 within the second limiting space 312 to limit the range of movement of the push rod 33 and prevent the push rod 33 from completely leaving the second limiting space 312. A pressing portion 21 is provided on the drive shaft of the hydraulic drive mechanism 2 to push the protruding ring 332. The pressing portion 21 is a rod-shaped structure that extends radially and upwardly along the drive shaft.

[0040] Meanwhile, a spring 34 is sleeved around the push rod 33 and is trapped between the side wall of the raised ring 332 facing the first limiting space 311 and the inner wall of the second limiting space 312. The provision of spring 34 not only assists in resetting the push rod 33 but also allows the activation pressure of the counter 32 to be controlled by adjusting the elastic force of spring 34, ensuring that the counter 32 only counts when the hydraulic wrench is actually loaded, thus avoiding counting when the hydraulic wrench is unloaded and more accurately reflecting the actual number of times the hydraulic wrench has operated.

[0041] In addition, to ensure the accuracy of the relative positions of the first conversion head 322 and the second conversion head 331 during squeezing, in this embodiment, a guide groove 333 is provided inside the push rod 33, and the free end of the rotating shaft 321 extends into the guide groove 333, thereby ensuring that the axes of the push rod 33 and the rotating shaft 321 always remain in the same straight line.

[0042] This embodiment of a hydraulic wrench with cycle counting, through the provision of a counting mechanism 3, can record the number of times the hydraulic wrench is used in real time. The counting result can be used to determine the time for maintenance of the wrench, thereby extending the service life of the wrench and the safety factor of use. Furthermore, compared to counting methods that rely on electronic devices for signal counting, the counting mechanism 3 adopts a mechanical drive structure, which can effectively reduce the requirements for the operating environment. In addition, by locating the counting mechanism 3 inside the housing 1, the counting mechanism 3 can be well protected.

[0043] In addition, it should be noted that the wrench body in this embodiment can adopt the structure of an existing hydraulic wrench, such as the hydraulic wrenches disclosed in patents such as CN212706492U, CN219925889U, and CN117733784A, and its specific structure is not described in detail here. The rotary counter can be purchased directly from the market, and its working principle and specific structure are also existing technology.

[0044] The above is a schematic description of the present invention and its embodiments, which is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by this and, without departing from the inventive purpose of the present invention, designs a structure and embodiment similar to the technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. A cycle counting hydraulic wrench, comprising a housing (1) and a hydraulic drive mechanism (2) disposed within the housing (1), characterized in that: A counting mechanism (3) is provided in the housing (1), and the counting mechanism (3) comprises a box (31), a counter (32) and a push rod (33) provided in the box (31); The counter (32) is a rotary counter, and a first conversion head (322) is provided on the rotating shaft (321) of the counter (32); The push rod (33) is provided with a second conversion head (331) that cooperates with the first conversion head (322); under the push of the driving shaft of the hydraulic drive mechanism (2), the push rod (33) causes the two conversion joints to squeeze each other, thereby driving the rotating shaft (321) to rotate, completing one count.

2. A cycle-countable hydraulic wrench according to claim 1, characterized in that: The first conversion head (322) is provided with an inclined surface on both sides of the end portion of the second conversion head (331). The second conversion head (331) is a V-shaped groove provided at the end portion of the push rod (33), and the V-shaped groove and the first conversion head (322) are staggered at a certain phase.

3. A cycle counting hydraulic wrench according to claim 1 or 2, characterized in that: The push rod (33) is provided with a convex ring (332), and the driving shaft of the hydraulic drive mechanism (2) is provided with an extrusion portion (21) for extruding the convex ring (332).

4. The cycle-countable hydraulic wrench according to claim 3, characterized in that: Two mutually connected limiting spaces are provided in the box body (31); wherein the counter (32) is located in the first limiting space (311); the main body of the push rod (33) and the convex ring (332) thereon are located in the second limiting space (312), and the side of the second limiting space (312) is provided with a through hole for the end of the push rod (33) away from the second conversion head (331) to freely pass through; the push rod (33) is provided with a spring (34), and the spring (34) is limited between the convex ring (332) and the inner wall of the second limiting space (312).

5. The cycle-countable hydraulic wrench according to claim 4, characterized in that: A guide groove (333) is provided inside the push rod (33), and the free end of the rotating shaft (321) extends into the guide groove (333).

6. The cycle-countable hydraulic wrench according to claim 1, characterized in that: The top of the inner cavity of the shell (1) is provided with a mounting groove for accommodating the box body (31), and the top of the shell (1) is provided with a fastening hole (11) for fixing the box body (31) and an observation port (12) for observing the counted quantity.

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