A digital jack based on an external stroke measuring device

Abstract

The present invention proposes a digital jack based on an external stroke measuring device, the digital jack comprising: a jack body, a stroke measuring device and a connecting rope. The jack body comprises a cylinder body and a piston rod, the cylinder body having a piston cavity, the first end of the piston rod being arranged in the piston cavity, the second end of the piston rod being located outside the piston cavity, the piston rod being movable relative to the cylinder body along the extension direction of the cylinder body, the stroke measuring device comprising a first shell and a measuring member, the first shell being connected to the cylinder body, the first shell having a first cavity, and the first cavity being connected to the piston cavity, the measuring member being arranged in the first cavity, the first end of the connecting rope being connected to the first end of the piston rod, and the second end of the connecting rope being connected to the measuring member, so that when the piston rod moves along the extension direction of the cylinder body, the measuring member can measure the displacement of the connecting rope, thereby determining the displacement of the piston rod based on the displacement of the connecting rope. The digital jack of the embodiment of the present invention has the advantages of easy maintenance and good measurement accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of jacks, and in particular to a digital jack based on an external stroke measuring device. Background Art

[0002] A jack is a lightweight lifting device that uses a rigid lifting member as a working device and, through top and bottom connections, lifts heavy objects within a limited stroke. It is primarily used in factories, mines, transportation, and other sectors for vehicle repair and other lifting and supporting tasks. With the development of automation, informatization, and intelligent technologies, engineering machinery, auxiliary machinery, lifting machinery, and other equipment that rely on jacks for state adjustment are placing higher demands on the technical performance of jacks. Digital jacks with stroke measurement and sensing capabilities are of great practical significance in promoting the automation and intelligent control of these equipment.

[0003] The related art uses a jack with a built-in stroke measuring device. The installation of the measuring sensor requires the complete disassembly of the jack's main structure. If the disassembly and assembly conditions are not available at the industrial site, the jack's stroke measuring function will fail and the jack needs to be returned to the factory for repair, which is time-consuming and labor-intensive. Summary of the Invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, an embodiment of the present invention proposes a digital jack based on an external stroke measuring device. The digital jack installs the stroke measuring device on the outside of the jack. Compared with the jacks in the related art, it is convenient for maintenance, avoids the overall disassembly of the jack, and improves work efficiency.

[0006] A digital jack based on an external stroke measuring device according to an embodiment of the present invention includes:

[0007] A jack body, the jack body comprising a cylinder and a piston rod, the cylinder having a piston cavity, a first end of the piston rod disposed within the piston cavity, a second end of the piston rod located outside the piston cavity, and the piston rod being movable relative to the cylinder along an extension direction of the cylinder;

[0008] A stroke measuring device, comprising a first housing and a measuring member, wherein the first housing is connected to the cylinder body, the first housing has a first cavity, and the first cavity is connected to the piston cavity, and the measuring member is disposed in the first cavity;

[0009] A connecting rope, wherein the first end of the connecting rope is connected to the first end of the piston rod, and the second end of the connecting rope is connected to the measuring piece, so that when the piston rod moves along the extension direction of the cylinder body, the measuring piece can measure the displacement of the connecting rope, thereby determining the displacement of the piston rod based on the displacement of the connecting rope.

[0010] The digital jack based on the external stroke measuring device in the embodiment of the present invention installs the stroke measuring device on the outside of the cylinder body, avoiding the need to disassemble the entire jack during maintenance. In addition, a connecting rope can be used to connect the measuring piece and the piston rod so that the displacement of the connecting rope can be measured by the measuring piece, thereby determining the displacement of the piston rod and improving the accuracy of the measurement.

[0011] In some embodiments, the stroke measuring device also includes a second shell, the first end of the second shell is connected to the cylinder body, the second end of the second shell is connected to the first shell, the second shell has a second cavity, the second cavity connects the piston cavity and the first cavity, and the first end of the connecting rope passes through the first cavity and the second cavity in sequence and is connected to the piston rod.

[0012] In some embodiments, the second housing extends in a radial direction of the cylinder, and an extending direction of the first housing is perpendicular to an extending direction of the second housing.

[0013] In some embodiments, a sealing member is further included, wherein the first end of the second shell has a connecting portion, the connecting portion is used to be connected to the peripheral wall of the cylinder body, the cylinder body is provided with a connecting hole, the connecting hole connects the second cavity and the piston cavity, the sealing member is provided between the side of the connecting portion adjacent to the cylinder body and the peripheral wall of the cylinder body, and the sealing member is arranged around the connecting hole along the circumference of the connecting hole.

[0014] In some embodiments, a guide member is further included, at least one of the first cavity and the second cavity is provided with a guide member, the extension direction of the guide member is orthogonal to the extension direction of the cylinder body, and a portion of the connecting rope is in contact with the side of the guide member away from the piston rod.

[0015] In some embodiments, the guide member has a guide groove, which is arranged around the guide member along the circumference of the guide member, and a portion of the connecting rope is placed in the guide groove.

[0016] In some embodiments, the first shell and the second shell are integrally formed.

[0017] In some embodiments, the stroke measuring device further includes an electrical connector, which is electrically connected to the measuring member, connected to the second end of the first shell, and located on a side of the first shell away from the second shell.

[0018] In some embodiments, a connecting member is further included, wherein the connecting member is disposed in the piston cavity, the first end of the connecting member is detachably connected to the first end of the piston rod, and the second end of the connecting member is connected to the first end of the connecting rope.

[0019] In some embodiments, a cylinder and a guide sleeve are further included, wherein the cylinder is located in the piston cavity and is used to be mounted on the first end of the piston rod, the guide sleeve is connected to the cylinder body and is located on the cylinder body adjacent to the second end of the piston rod, and the second end of the piston rod passes through the guide sleeve along the extension direction of the cylinder body and is placed on the outside of the cylinder body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The figure is a structural diagram of a digital jack based on an external stroke measuring device according to an embodiment of the present invention.

[0021] Figure 2 yes Figure 1 Schematic cross-sectional view at AA in the middle.

[0022] Reference numerals:

[0023] Jack body 1; cylinder body 11; piston chamber 111; piston rod 12;

[0024] Distance measuring device 2; first housing 21; first cavity 211; measuring member 22; second housing 23; second cavity 231;

[0025] Connecting rope 3;

[0026] Guide 4;

[0027] Electrical connector 5;

[0028] Connector 6;

[0029] Cylinder 7;

[0030] Guide sleeve 8. DETAILED DESCRIPTION

[0031] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0032] like Figure 1 and Figure 2As shown, a digital jack based on an external stroke measuring device according to an embodiment of the present invention includes: a jack body 1 , a stroke measuring device 2 and a connecting rope 3 .

[0033] The jack body 1 includes a cylinder body 11 and a piston rod 12. The cylinder body 11 has a piston cavity 111. The first end of the piston rod 12 is arranged in the piston cavity 111, and the second end of the piston rod 12 is located outside the piston cavity 111. The piston rod 12 is movable relative to the cylinder body 11 along the extension direction of the cylinder body 11.

[0034] Specifically, if Figure 1 and Figure 2 As shown, the jack body 1 is arranged in the left-right direction, and the extension direction of the cylinder body 11 is consistent with the left-right direction, so the piston rod 12 can move in the left-right direction relative to the cylinder body 11. The left end of the piston rod 12 is the first end of the piston rod 12, and the right end of the piston rod 12 is the second end of the piston rod 12. The right end of the piston rod 12 is provided with a mounting hole so that it can be connected to other equipment through the mounting hole.

[0035] The stroke measuring device 2 includes a first housing 21 and a measuring member 22. The first housing 21 is connected to the cylinder body 11 and defines a first cavity 211, which communicates with the piston chamber 111. The measuring member 22 is disposed within the first cavity 211. The first end of the connecting rope 3 is connected to the first end of the piston rod 12, and the second end of the connecting rope 3 is connected to the measuring member 22. When the piston rod 12 moves along the extension direction of the cylinder body 11, the measuring member 22 can measure the displacement of the connecting rope 3, thereby determining the displacement of the piston rod 12 based on the displacement of the connecting rope 3.

[0036] Specifically, the first shell 21 is installed on the outside of the cylinder body 11, and the measuring piece 22 located in the first shell 21 is connected to the piston rod 12 through the connecting rope 3, so that when the stroke measuring device 2 fails, the jack can be avoided from being disassembled as a whole, which facilitates installation and maintenance.

[0037] It will be appreciated that the measuring member 22 is mounted within the first cavity 211 so that the first housing 21 protects the measuring member 22 and prevents it from being squeezed during use. The measuring member 22 may be a draw-wire displacement sensor, with the first end of the connecting cord 3 connected to the sensor's draw cord, and the second end of the connecting cord 3 connected to the piston rod 12. Movement of the piston rod 12 drives movement of the connecting cord 3, thereby measuring the displacement of the connecting cord 3 using the measuring member 22. Since the displacement of the piston rod 12 is equal to the displacement of the connecting cord 3, the displacement of the piston rod 12 can be determined.

[0038] It should be noted that the measuring member 22 may also be other types of linear displacement sensors, so as to obtain the displacement of the piston rod 12 by measuring the displacement of the connecting rope 3. The connecting rope 3 may be a highly flexible rope such as a steel wire.

[0039] In addition, if the measuring member 22 adopts a wire-type displacement sensor, the wire of the sensor can be connected to the piston rod 12 as a connecting rope 3.

[0040] In other words, the digital jack based on the external stroke measuring device of the embodiment of the present invention installs the stroke measuring device 2

[0041] On the outside of the cylinder body 11, the need to disassemble the entire jack during maintenance is avoided. In addition, the connecting rope 3 can be used to connect the measuring piece 22 and the piston rod 12, so that the displacement of the connecting rope 3 can be measured by the measuring piece 22, thereby determining the displacement of the piston rod 12 and improving the accuracy of the measurement.

[0042] In some embodiments, the stroke measuring device 2 further includes a second housing 23, a first end of the second housing 23 is connected to the cylinder 11, a second end of the second housing 23 is connected to the first housing 21, and the second housing 23 has a second cavity 231.

[0043] The cavity 231 connects the piston cavity 111 and the first cavity 211 , and the first end of the connecting rope 3 passes through the first cavity 211 and the second cavity 231 in sequence and is connected to the piston rod 12 .

[0044] Specifically, if Figure 1 and Figure 2 As shown, the first end of the second shell 23 (i.e., the lower end of the second shell 23) can be connected to the cylinder body 11 by screws or the like, and the second end of the second shell 23 (i.e., the upper end of the second shell 23) is threadedly connected to the first end of the first shell 21 (i.e., the left end of the first shell 21). For example, the outer peripheral surface of the first end of the first shell 21 is provided with a thread, and the second end of the second shell 23 is provided with a threaded hole matching the thread.

[0045] Preferably, the second housing 23 extends along the radial direction of the cylinder 11, and the extension direction of the first housing 21 is perpendicular to the extension direction of the second housing 23. It is understandable that due to the different specifications of the jacks, the stroke of each jack has certain differences, such as Figure 1 and Figure 2 As shown, the extension direction of the second shell 23 is consistent with the up-down direction, and the extension direction of the first shell 21 is consistent with the left-right direction. Thus, the length of the connecting rope 3 can be increased, and the jacks with different travel specifications can be applied.

[0046] The top can also reduce the space occupied by the first shell 21 and the second shell 23 outside the cylinder body 11, so that it can be applied to more 0 working scenarios.

[0047] In some embodiments, the digital jack based on the external stroke measuring device of the embodiment of the present invention also includes a seal. The first end of the second shell 23 has a connecting portion, which is used to be connected to the peripheral wall of the cylinder body 11. The cylinder body 11 is provided with a connecting hole, which connects the second cavity 231 and the piston cavity 111. The seal is provided between the side of the connecting portion adjacent to the cylinder body 11 and the peripheral wall of the cylinder body 11, and the seal is arranged around the connecting hole along the circumference of the connecting hole.

[0048] 5 Specifically, Figure 1 and Figure 2 As shown, the connection portion is located at the bottom of the second housing 23, and a communication hole extends through the side wall of the cylinder body 11. The second housing 23 is connected above the communication hole, so that the second cavity 231 communicates with the piston cavity 111 through the communication hole. The seal is an O-ring, which is located on the outer peripheral wall of the cylinder body 11 and surrounds the communication hole. When the second housing 23 is connected to the cylinder body 11, the seal can prevent the liquid in the piston cavity 111 from flowing out through the gap between the second housing 23 and the cylinder body 11.

[0049] Optionally, a seal may be provided at the threaded connection between the first housing 21 and the second housing 23 to increase the travel

[0050] The sealing between the measuring device 2 and the cylinder 11 is measured.

[0051] In addition, optionally, in a relatively harsh working environment and when high sealing performance requirements are placed on the first shell 21, the second shell 23 and the cylinder body 11, the first shell 21 and the second shell 23 can be integrally formed, for example, by casting to manufacture the first shell 21 and the second shell 23 as one piece.

[0052] In some embodiments, the digital jack based on the external stroke measuring device of the embodiment of the present invention also includes a guide member 4, at least one of the first cavity 211 and the second cavity 231 is provided with a guide member 4, the extension direction of the guide member 4 is orthogonal to the extension direction of the cylinder body 11, and a portion of the connecting rope 3 is in contact with the side of the guide member 4 away from the piston rod 12.

[0053] Specifically, if Figure 1 and Figure 2 As shown, there are two guide members 4, one of which is disposed in the second housing 23 and adjacent to the piston rod 12, and the other is disposed in the first housing 21 and adjacent to the second housing 23 to facilitate the movement of the connecting rope 3. Optionally, the guide members 4 can be guide wheels to reduce friction between the guide members 4 and the connecting rope 3 and increase service life.

[0054] Preferably, the guide member 4 has a guide groove, which is arranged around the guide member 4 along the circumference of the guide member 4, and a portion of the connecting rope 3 is placed in the guide groove. It can be understood that placing a portion of the connecting rope 3 in the guide groove can prevent the connecting rope 3 from deviating relative to the guide member 4 during movement.

[0055] In some embodiments, the travel measurement device 2 further includes an electrical connector 5 , which is electrically connected to the measuring element 22 . The electrical connector 5 is connected to the second end of the first housing 21 and is located on the side of the first housing 21 away from the second housing 23 . It is understood that the electrical connector 5 is located at the right end of the first housing 21 to facilitate connection to other receiving devices. Specifically, the electrical connector 5 is used to transmit travel data detected by the measuring element 22 to the receiving device.

[0056] In some embodiments, the digital jack based on the external stroke measuring device of the embodiment of the present invention also includes a connecting member 6, which is arranged in the piston chamber 111, and the first end of the connecting member 6 is detachably connected to the first end of the piston rod 12, and the second end of the connecting member 6 is connected to the first end of the connecting rope 3.

[0057] Specifically, if Figure 1 and Figure 2 As shown, the first end of the connecting member 6 (i.e., the lower end of the connecting member 6) is threadedly connected to the piston rod 12, that is, the lower end of the connecting member 6 is provided with threads, and the first end of the piston rod 12 is provided with a threaded hole that matches the thread of the connecting member 6, so that the connecting member 6 fits into the threaded hole of the piston rod 12. The first end of the connecting rope 3 can be wrapped around the second end of the connecting member 6 (i.e., the upper end of the connecting member 6). Of course, the connecting rope 3 can also be connected to the connecting member 6 by other means such as bonding.

[0058] In some embodiments, the digital jack based on the external stroke measuring device of the embodiment of the present invention also includes a cylinder 7 and a guide sleeve 8. The cylinder 7 is located in the piston cavity 111 and is used to be sleeved on the first end of the piston rod 12. The guide sleeve 8 is connected to the cylinder body 11 and is located at the second end of the cylinder body 11 adjacent to the piston rod 12. The second end of the piston rod 12 passes through the guide sleeve 8 along the extension direction of the cylinder body 11 and is placed on the outside of the cylinder body 11.

[0059] Specifically, if Figure 1 and Figure 2 As shown, the cylinder 7 is mounted on the first end of the piston rod 12 and is connected to the piston rod 12 by bolts. The piston chamber 111 has an opening, which is located at the second end of the cylinder body 11. The guide sleeve 8 is installed in the opening, and the right end of the piston rod 12 passes through the guide sleeve 8 and is placed outside the cylinder body 11 to facilitate connection with other equipment. The guide sleeve 8 can guide the piston rod 12 and also block the gap between the second section of the cylinder body 11 and the second section of the piston rod 12.

[0060] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0061] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0062] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0063] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0064] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0065] Although the above embodiments have been shown and described, it is understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those skilled in the art are all within the scope of protection of the present invention.

Claims

1. A digital jack based on an external stroke measuring device, characterized in that: include: A jack body, the jack body comprising a cylinder and a piston rod, the cylinder having a piston cavity, a first end of the piston rod disposed within the piston cavity, a second end of the piston rod located outside the piston cavity, and the piston rod being movable relative to the cylinder along an extension direction of the cylinder; A stroke measuring device, comprising a first housing and a measuring member, wherein the first housing is connected to the cylinder body, the first housing has a first cavity, and the first cavity is connected to the piston cavity, and the measuring member is disposed in the first cavity; a connecting rope, wherein a first end of the connecting rope is connected to a first end of the piston rod, and a second end of the connecting rope is connected to the measuring member, so that when the piston rod moves along the extension direction of the cylinder body, the measuring member can measure the displacement of the connecting rope, thereby determining the displacement of the piston rod based on the displacement of the connecting rope; The stroke measuring device further includes a second housing, a first end of the second housing being connected to the cylinder body via a screw, a second end of the second housing being connected to the first housing, the second housing having a second cavity, the second cavity communicating with the piston cavity and the first cavity, and a first end of the connecting rope passing through the first cavity and the second cavity in sequence and connected to the piston rod; The second housing extends in a radial direction of the cylinder body, and an extending direction of the first housing is perpendicular to an extending direction of the second housing; The stroke measuring device further includes an electrical connector, the electrical connector being electrically connected to the measuring member, the electrical connector being connected to the second end of the first housing, and the electrical connector being located on a side of the first housing away from the second housing; It also includes a connecting piece, which is arranged in the piston cavity, the first end of the connecting piece is detachably connected to the first end of the piston rod, and the second end of the connecting piece is connected to the first end of the connecting rope.

2. The digital jack based on the external stroke measuring device according to claim 1, characterized in that: It also includes a sealing member, the first end of the second shell has a connecting portion, the connecting portion is used to be connected to the peripheral wall of the cylinder body, the cylinder body is provided with a connecting hole, the connecting hole connects the second cavity and the piston cavity, the sealing member is arranged between the side of the connecting portion adjacent to the cylinder body and the peripheral wall of the cylinder body, and the sealing member is arranged around the connecting hole along the circumference of the connecting hole.

3. The digital jack based on the external stroke measuring device according to claim 2, characterized in that: It also includes a guide member, at least one of the first cavity and the second cavity is provided with a guide member, the extension direction of the guide member is orthogonal to the extension direction of the cylinder body, and a portion of the connecting rope is in contact with the side of the guide member away from the piston rod.

4. The digital jack based on the external stroke measuring device according to claim 3, characterized in that: The guide member has a guide groove, which is arranged around the guide member along the circumference of the guide member, and a portion of the connecting rope is placed in the guide groove.

5. The digital jack based on an external stroke measuring device according to claim 1, characterized in that: The first shell and the second shell are integrally formed.

6. The digital jack based on an external stroke measuring device according to claim 1, characterized in that: It also includes a cylinder and a guide sleeve, wherein the cylinder is located in the piston cavity and is used to be mounted on the first end of the piston rod, the guide sleeve is connected to the cylinder body and is located on the cylinder body adjacent to the second end of the piston rod, and the second end of the piston rod passes through the guide sleeve along the extension direction of the cylinder body and is placed on the outside of the cylinder body.

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