Hydraulic wrench with self-resetting function
By designing a hydraulic wrench with self-reset function, the ratchet structure and reset structure are used to achieve forward rotation and reverse reset of the hexagon sleeve, which solves the problem of inconvenient use of the hydraulic wrench and realizes continuous tightening or loosening of the bolts.
Patent Information
- Application Number
- CN202422352511.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-25
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-09-25
AI Technical Summary
When existing hydraulic wrenches continuously tighten or loosen the bolts, they need to repeatedly engage or disengage the bolt head, which is inconvenient to use.
A hydraulic wrench with self-reset function is designed. The forward rotation and reverse reset of the hexagon sleeve are achieved through the ratchet structure and the reset structure. Combined with the locking structure, the reverse rotation is prevented, and the intermittent screwing is achieved by the telescopic action of the hydraulic cylinder piston rod.
It is realized that the bolt can be continuously tightened or loosened in one direction without detaching the bolt, which improves the convenience of use.
Smart Images
Figure CN223084668U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hydraulic wrenches, and more specifically, to a hydraulic wrench with a self-resetting function. Background Art
[0002] A hydraulic wrench is short for a hydraulic torque wrench. It uses hydraulic pressure as the power to provide large torque output and is a professional bolt tightening tool for bolt installation and disassembly. It is often used to tighten and loosen bolts of relatively large sizes. Currently, Chinese Patent Publication No.: CN221160155U discloses a thin-type hydraulic wrench. Its working principle is as follows: By connecting a tubing interface to an external hydraulic device, the piston rod of the hydraulic cylinder is controlled to contract, so that the pawl engages and drives the ratchet wheel. The ratchet wheel rotates on the convex ring through an annular groove, so that the nut with a hexagonal screw hole sleeved inside the ratchet wheel is rotated for fixation or disassembly. However, in the structure of this hydraulic wrench, when the hydraulic wrench needs to continuously tighten the bolt in one direction, the nut with a hexagonal screw hole on the hydraulic wrench needs to repeatedly engage with or disengage from the head of the bolt. That is, after the nut with a hexagonal screw hole engages with the head of the bolt, the hydraulic cylinder drives the nut with a hexagonal screw hole to rotate forward. At this time, the nut with a hexagonal screw hole can drive the bolt to rotate. When the hydraulic cylinder needs to reset, it is necessary to make the nut with a hexagonal screw hole disengage from the head of the bolt to prevent the nut with a hexagonal screw hole from driving the bolt to rotate back. That is, when it is necessary to continuously tighten or loosen the bolt in one direction, the nut with a hexagonal screw hole needs to repeatedly engage with or disengage from the head of the bolt, resulting in the disadvantage of inconvenient use of the hydraulic wrench. Summary of the Utility Model
[0003] The technical problem to be solved by the utility model is to provide a hydraulic wrench with a self-resetting function, which can continuously tighten or loosen the bolt in one direction without disengaging from the bolt, thus having the advantage of convenient use.
[0004] The utility model provides a hydraulic wrench with a self - reset function, which comprises a housing, a hydraulic cylinder, an internal hexagon socket and a rotation driving member; the internal hexagon socket is rotatably connected inside the front end of the housing, the hydraulic cylinder is arranged at the rear end of the housing, the rotation driving member is arranged inside the housing, the lower part of the rotation driving member is rotatably sleeved outside the internal hexagon socket, and the rotation driving member is unidirectionally engaged with the internal hexagon socket through a ratchet structure; the hydraulic wrench further comprises a reset structure and a locking structure; the end of the piston rod of the hydraulic cylinder abuts against the inner side of the upper part of the rotation driving member, the middle part of the rotation driving member is connected with the housing through the reset structure, and the locking structure is connected inside the housing and is used to prevent the internal hexagon socket from rotating in the reverse direction; when the piston rod of the hydraulic cylinder extends and pushes the rotation driving member to rotate forward, the rotation driving member drives the internal hexagon socket to rotate forward through the ratchet structure; when the piston rod of the hydraulic cylinder contracts, the reset structure is used to drive the rotation driving member to rotate reversely and reset relative to the internal hexagon socket.
[0005] After the utility model adopts the above - mentioned structure, during the repeated expansion and contraction of the piston rod of the hydraulic cylinder, when the piston rod of the hydraulic cylinder extends and pushes the rotation driving member to rotate forward, the rotation driving member can drive the internal hexagon socket to rotate forward through the ratchet structure; when the piston rod of the hydraulic cylinder contracts, the reset structure can drive the rotation driving member to rotate reversely and reset relative to the internal hexagon socket, and at this time, the internal hexagon socket is locked by the locking structure and cannot rotate in the reverse direction; that is, when the piston rod of the hydraulic cylinder repeatedly expands and contracts, it can intermittently drive the internal hexagon socket to rotate forward, so as to continuously screw the bolt in one direction; that is, when the utility model needs to continuously tighten or loosen the bolt in one direction, there is no need to repeatedly engage or disengage the internal hexagon socket with the bolt, thus bringing convenience to the use of the hydraulic wrench.
[0006] In a possible implementation manner, a pushing member is fixed on the end of the piston rod of the hydraulic cylinder, a limiting block is arranged on the side of the pushing member away from the hydraulic cylinder, an arc - shaped groove is arranged on the inner side of the upper part of the rotation driving member, the limiting block is slidably connected in the arc - shaped groove, and both the front and rear sides of the limiting block abut against the inner side wall of the arc - shaped groove; after adopting this structure, under the cooperation of the limiting block and the arc - shaped groove, the pushing member can not only realize the sliding connection with the rotation driving member, but also achieve the purpose of front - and - rear limiting, that is, it can make the end of the piston rod of the hydraulic cylinder realize sliding connection and front - and - rear limiting with the rotation driving member, so that the end of the piston rod of the hydraulic cylinder can reliably abut against the inner side of the rotation driving member.
[0007] In a possible implementation, the ratchet structure includes a slider and at least one first spring; first ratchets are circumferentially and spacedly arranged on the outer peripheral wall of the hexagon socket; a chute is arranged on the inner wall of the rotary driving member, the slider is slidably connected in the chute, several second ratchets are arranged on the outer end of the slider, and the first spring is embedded between the inner end of the slider and the inner end of the chute. The first spring is used to apply a thrust to the slider so that several second ratchets engage with some of the first ratchets; after adopting such a ratchet structure, when the hydraulic cylinder pushes the rotary driving member to rotate the rotary driving member forward, under the thrust of the first spring, several second ratchets are in a state of engaging with some of the first ratchets, so that the rotary driving member can drive the hexagon socket to rotate forward through the slider, that is, the hexagon socket can drive the bolt to rotate; when the piston rod of the hydraulic cylinder contracts, the reset structure can drive the rotary driving member to rotate reversely and reset relative to the hexagon socket. At this time, several second ratchets on the slider can be disengaged from some of the first ratchets that were originally engaged and finally engage with the next part of the first ratchets.
[0008] In a possible implementation, the reset structure includes a tension spring; a first connecting pin is fixed in the middle of the inner side of the rotary driving member, a second connecting pin is fixed on the inner side of the rear part of the housing, and the two ends of the tension spring are respectively hooked to the first connecting pin and the second connecting pin. The tension spring is used to apply a pulling force to the rotary driving member to drive the rotary driving member to rotate reversely relative to the hexagon socket; after adopting such a reset structure, when the piston rod of the hydraulic cylinder contracts, that is, when the hydraulic cylinder releases the pushing action on the rotary driving member, under the action of the tension spring, the tension spring can drive the rotary driving member to rotate reversely and reset relative to the hexagon socket; this reset structure has the advantages of simple structure, low cost and high reliability.
[0009] In a possible implementation, the locking structure includes a rotating arm and a second spring; the middle of the rotating arm is rotatably connected to the front end of the housing, several third ratchets are arranged on the inner side of the lower end of the rotating arm, and several third ratchets engage with some of the first ratchets. A long hole for the lower end of the rotating arm to pass through is arranged on the side wall of the rotary driving member, and the second spring is embedded between the housing and the inner side of the upper end of the rotating arm. The second spring is used to apply a rotational thrust to the rotating arm to drive several third ratchets to engage with some of the first ratchets; after adopting such a locking structure, when the hydraulic cylinder pushes the rotary driving member to rotate the rotary driving member forward, under the action of the ratchet structure, the hexagon socket can rotate forward with the rotary driving member. When the hexagon socket rotates forward, several third ratchets can continuously disengage from some of the first ratchets in the original position and engage with the next part of the first ratchets under the action of the second spring; when the reset structure drives the rotary driving member to rotate reversely and reset relative to the hexagon socket, under the cooperation of the third ratchets and the first ratchets, the rotating arm can prevent the hexagon socket from rotating reversely, that is, it can prevent the hexagon socket from rotating reversely with the rotary driving member.
[0010] In a possible implementation, convex rings with an outer diameter smaller than that of the hexagon socket are provided at both ends of the hexagon socket in the axial direction. Both convex rings are embedded in the housing and rotatably connected to the housing. After adopting this structure, under the action of the convex rings, the hexagon socket can be reliably rotatably connected to the housing through the two convex rings. And since the outer diameter of the convex ring is smaller than that of the hexagon socket, axial limitation of the hexagon socket can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;
[0012] Figure 2 is a sectional structural schematic diagram of the present utility model;
[0013] Figure 3 is a three-dimensional structural schematic diagram after the top-pushing member and the rotary driving member are cooperatively limited. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0014] First of all, those skilled in the art should understand that these embodiments are only used to explain the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can make adjustments according to needs to adapt to specific application scenarios.
[0015] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly defined and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.
[0016] In the embodiments of the present application, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.
[0017] The present application will be further described in detail below with reference to the drawings and specific embodiments.
[0018] See Figures 1-3As shown in the figure, an embodiment of the present application discloses a hydraulic wrench with a self-resetting function, which includes a housing 1, a hydraulic cylinder 2, a hexagon socket 3, and a rotary drive member 4; the hexagon socket 3 is rotatably connected to the inside of the front end of the housing 1, the hydraulic cylinder 2 is arranged at the rear end of the housing 1, the rotary drive member 4 is arranged inside the housing 1, and the lower part of the rotary drive member 4 is rotatably sleeved outside the hexagon socket 3. The rotary drive member 4 is unidirectionally engaged with the hexagon socket 3 through a ratchet structure; the hydraulic wrench further includes a reset structure and a locking structure; the end of the piston rod of the hydraulic cylinder 2 abuts against the inner side of the upper part of the rotary drive member 4, the middle part of the rotary drive member 4 is connected to the housing 1 through the reset structure, and the locking structure is connected inside the housing 1 and is used to prevent the hexagon socket 3 from rotating in the reverse direction; when the piston rod of the hydraulic cylinder 2 extends and pushes the rotary drive member 4 to rotate forward, the rotary drive member 4 drives the hexagon socket 3 to rotate forward through the ratchet structure; when the piston rod of the hydraulic cylinder 2 contracts, the reset structure is used to drive the rotary drive member 4 to rotate in the reverse direction and reset relative to the hexagon socket 3.
[0019] A push member 5 is fixed to the end of the piston rod of the hydraulic cylinder 2. A limit block 51 is arranged on the side of the push member 5 away from the hydraulic cylinder 2. An arc-shaped groove 41 is arranged on the inner side of the upper part of the rotary drive member 4. The limit block 51 is slidably connected in the arc-shaped groove 41, and both the front and rear sides of the limit block 51 abut against the inner side wall of the arc-shaped groove 41; by adopting this structure, under the cooperation of the limit block and the arc-shaped groove, the push member can not only realize the sliding connection with the rotary drive member, but also realize the purpose of front and rear limiting, that is, it can make the end of the piston rod of the hydraulic cylinder realize the sliding connection and front and rear limiting with the rotary drive member, so that the end of the piston rod of the hydraulic cylinder can reliably abut against the inner side of the rotary drive member.
[0020] The ratchet structure includes a slider 6 and at least one first spring 7; first ratchets 31 are circumferentially and spacedly arranged on the outer peripheral wall of the hexagon socket 3, a chute 42 is arranged on the inner wall of the rotary driving member 4, the slider 6 is slidably connected in the chute 42, a plurality of second ratchets 61 are arranged on the outer end portion of the slider 6, the first spring 7 is fitted between the inner end portion of the slider 6 and the inner end portion of the chute 42, and the first spring 7 is used to apply a thrust force to the slider 6 so that the plurality of second ratchets 61 are engaged with some of the first ratchets 31; after adopting this ratchet structure, when the hydraulic cylinder pushes the rotary driving member to rotate the rotary driving member forward, under the thrust of the first spring, the plurality of second ratchets are in a state of being engaged with some of the first ratchets, so that the rotary driving member can drive the hexagon socket to rotate forward through the slider, that is, the hexagon socket can drive the bolt to rotate; when the piston rod of the hydraulic cylinder contracts, the reset structure can drive the rotary driving member to rotate reversely and reset relative to the hexagon socket. At this time, the plurality of second ratchets on the slider can be disengaged from some of the first ratchets that were originally engaged and finally engaged with the next part of the first ratchets.
[0021] The reset structure includes a tension spring 8; a first connecting pin 43 is fixed in the middle of the inner side of the rotary driving member 4, a second connecting pin 11 is fixed on the inner side of the rear part of the housing 1, and the two ends of the tension spring 8 are respectively hooked to the first connecting pin 43 and the second connecting pin 11. The tension spring 8 is used to apply a pulling force to the rotary driving member 4 to drive the rotary driving member 4 to rotate reversely relative to the hexagon socket 3; after adopting this reset structure, when the piston rod of the hydraulic cylinder contracts, that is, when the hydraulic cylinder releases the pushing effect on the rotary driving member, under the action of the tension spring, the tension spring can drive the rotary driving member to rotate reversely and reset relative to the hexagon socket; this reset structure has the advantages of simple structure, low cost and high reliability.
[0022] The locking structure includes a rotating arm 9 and a second spring 10; the middle of the rotating arm 9 is rotatably connected to the front end of the housing 1, and several third ratchet teeth 91 are arranged on the inner side of the lower end of the rotating arm 9. Several third ratchet teeth 91 are engaged with some of the first ratchet teeth 31. A long hole 44 for the lower end of the rotating arm 9 to pass through is arranged on the side wall of the rotary drive member 4. The second spring 10 is installed between the housing 1 and the inner side of the upper end of the rotating arm 9. The second spring 10 is used to apply a rotational thrust to the rotating arm 9 to drive several third ratchet teeth 91 to engage with some of the first ratchet teeth 31. After adopting this locking structure, when the hydraulic cylinder pushes the rotary drive member to rotate forward, under the action of the ratchet structure, the inner hexagon socket can rotate forward with the rotary drive member. When the inner hexagon socket rotates forward, several third ratchet teeth can continuously disengage from some of the first ratchet teeth in the original position and engage with the latter part of the first ratchet teeth under the action of the second spring. When the reset structure drives the rotary drive member to rotate reversely and reset relative to the inner hexagon socket, under the cooperative action of the third ratchet teeth and the first ratchet teeth, the rotating arm can prevent the inner hexagon socket from rotating reversely, that is, it can prevent the inner hexagon socket from rotating reversely with the rotary drive member.
[0023] Convex rings 32 with an outer diameter smaller than that of the inner hexagon socket 3 are arranged at both ends of the inner hexagon socket 3 in the axial direction. Both convex rings 32 are embedded in the housing 1 and rotatably connected to the housing 1. After adopting this structure, under the action of the convex rings, the inner hexagon socket can be reliably rotatably connected to the housing through the two convex rings, and since the outer diameter of the convex ring is smaller than the outer diameter of the inner hexagon socket, axial limitation of the inner hexagon socket can be achieved.
[0024] When the present utility model is in use, during the repeated telescopic movement of the piston rod of the hydraulic cylinder, when the piston rod of the hydraulic cylinder extends and pushes the rotary drive member to rotate forward, the rotary drive member can drive the inner hexagon socket to rotate forward through the ratchet structure. When the piston rod of the hydraulic cylinder contracts, the reset structure can drive the rotary drive member to rotate reversely and reset relative to the inner hexagon socket, and at this time, the inner hexagon socket is locked by the locking structure and cannot rotate reversely. That is, when the piston rod of the hydraulic cylinder repeatedly telescopes, it can intermittently drive the inner hexagon socket to rotate forward, so as to continuously screw the bolt in one direction.
[0025] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. A hydraulic wrench with a self-resetting function, comprising a housing (1), a hydraulic cylinder (2), an internal hexagonal socket (3) and a rotary drive member (4); the internal hexagonal socket (3) is rotatably connected to the inside of the front end of the housing (1), the hydraulic cylinder (2) is arranged at the rear end of the housing (1), the rotary drive member (4) is arranged inside the housing (1), the lower part of the rotary drive member (4) is rotatably sleeved outside the internal hexagonal socket (3), and the rotary drive member (4) is unidirectionally engaged with the internal hexagonal socket (3) through a ratchet structure; characterized in that: The hydraulic wrench further includes a reset structure and a locking structure; the end of the piston rod of the hydraulic cylinder (2) abuts against the inner side of the upper part of the rotary driving member (4), the middle part of the rotary driving member (4) is connected to the housing (1) through the reset structure, and the locking structure is connected inside the housing (1) and is used to prevent the hexagon socket (3) from rotating reversely; when the piston rod of the hydraulic cylinder (2) extends and pushes the rotary driving member (4) to rotate forward, the rotary driving member (4) drives the hexagon socket (3) to rotate forward through the ratchet structure; when the piston rod of the hydraulic cylinder (2) contracts, the reset structure is used to drive the rotary driving member (4) to rotate reversely and reset relative to the hexagon socket (3).
2. The hydraulic wrench with self-resetting function according to claim 1, wherein: A pushing member (5) is fixed to the end of the piston rod of the hydraulic cylinder (2), a limiting block (51) is arranged on the side of the pushing member (5) away from the hydraulic cylinder (2), an arc-shaped groove (41) is arranged on the inner side of the upper part of the rotary driving member (4), the limiting block (51) is slidably connected in the arc-shaped groove (41), and both the front and rear sides of the limiting block (51) abut against the inner side wall of the arc-shaped groove (41).
3. The hydraulic wrench with self-resetting function according to claim 1 or 2, characterized in that: The ratchet structure includes a slider (6) and at least one first spring (7); first ratchets (31) are circumferentially arranged at intervals on the outer peripheral wall of the hexagon socket (3), a sliding groove (42) is arranged on the inner wall of the rotary driving member (4), the slider (6) is slidably connected in the sliding groove (42), a plurality of second ratchets (61) are arranged on the outer end of the slider (6), the first spring (7) is installed between the inner end of the slider (6) and the inner end of the sliding groove (42), and the first spring (7) is used to apply a pushing force to the slider (6) so that a plurality of the second ratchets (61) are engaged with some of the first ratchets (31).
4. The hydraulic wrench with self-resetting function according to claim 3, characterized in that: The reset structure includes a tension spring (8); a first connecting pin (43) is fixed to the middle part of the inner side of the rotary driving member (4), a second connecting pin (11) is fixed to the inner side of the rear part of the housing (1), and both ends of the tension spring (8) are hooked to the first connecting pin (43) and the second connecting pin (11) respectively, and the tension spring (8) is used to apply a pulling force to the rotary driving member (4) to drive the rotary driving member (4) to rotate reversely relative to the hexagon socket (3).
5. The hydraulic wrench with self-resetting function according to claim 3, characterized in that: The locking structure includes a rotating arm (9) and a second spring (10); the middle part of the rotating arm (9) is rotatably connected to the front end of the housing (1), several third ratchet teeth (91) are arranged on the inner side of the lower end of the rotating arm (9), and several of the third ratchet teeth (91) are engaged with some of the first ratchet teeth (31). A long hole (44) for the lower end of the rotating arm (9) to pass through is arranged on the side wall of the rotary drive member (4). The second spring (10) is installed between the housing (1) and the inner side of the upper end of the rotating arm (9), and the second spring (10) is used to apply a rotational thrust to the rotating arm (9) to drive several of the third ratchet teeth (91) to engage with some of the first ratchet teeth (31).
6. The hydraulic wrench with self-resetting function according to claim 1 or 2 or 4 or 5, characterized in that: Convex rings (32) with an outer diameter smaller than that of the hexagon socket (3) are arranged at both ends of the hexagon socket (3) in the axial direction. Both of the convex rings (32) are embedded in the housing (1) and rotatably connected to the housing (1).