Damage-prevention quick clamping and lifting tool

Abstract

The invention belongs to the technical field of machinery, and particularly relates to a lifting appliance, in particular to an anti-damage rapid clamping lifting tool which comprises a lifting shaft, a pressing plate is fixedly mounted on the front end face of the lifting shaft, a pressing ring is slidably mounted on the front portion of the lifting shaft, and two first spring mounting holes are symmetrically formed in the pressing plate; a first spring is assembled in the first spring mounting hole, a pull rod penetrates through the first spring mounting hole, the front end of the pull rod compresses the first spring, and the rear end of the pull rod is fixedly connected with the hold-down ring; a lifting locking rod is installed on the lifting shaft and located between the pressing plate and the pressing ring in a penetrating mode, a lifting ring is arranged at the end of the lifting locking rod, an upper oval ring and a lower oval ring are fixedly arranged on the upper portion and the lower portion of the lifting locking rod respectively, and a locking clamping groove is formed in the lower oval ring. A locking pin is installed on the pressing plate through a reserved hole, the inner end of the locking pin is located in the locking clamping groove in the locking state, and the locking pin is driven by a dismounting handle. A bottom plate is fixed at the rear end of the lifting shaft; and a positioning and locking device is arranged on the bottom plate. The method is reasonable in design and has good practical application value.

Description

Technical Field

[0001] The invention belongs to the field of mechanical technology, and in particular relates to a sling, in particular to a damage-proof quick-clamping lifting tool. Background Art

[0002] In mechanical processing, fixtures are usually used for auxiliary processing to improve processing efficiency and consistency of product dimensions. The positioning surfaces of the fixtures are all finish-machined surfaces, which are used as precise references for positioning. Wear of the positioning surfaces will affect the accuracy and pass rate of part processing.

[0003] For parts that require machining on multiple surfaces, the fixture needs to be flipped over during machining to perform different process steps. Multiple surfaces on the fixture require lifting tools, and machining lifting holes and installing eyebolts on the fixture are common lifting methods. The lifting holes on the fixture require direct contact with the hook during each lift. Prolonged contact and lifting will cause bumps and local deformation, and prolonged use will reduce the accuracy of the fixture. While eyebolts avoid bumps and local deformation, they must be removed when the finely machined surface of the fixture is used as a positioning surface. Removing and installing the eyebolts takes a considerable amount of time, increasing the workload and reducing production efficiency.

[0004] It is now necessary to design a lifting device installed on the fine-machined surface of the tooling fixture, which can protect the fine-machined surface of the tooling fixture and achieve rapid disassembly and assembly. Summary of the Invention

[0005] In order to overcome the technical problems that the commonly used lifting methods of existing tooling fixtures are prone to bumps, which will cause deformation or even scrapping due to long-term bumps, and the disassembly and assembly process will delay time and reduce production efficiency, the present invention provides a damage-proof quick clamping and lifting tool installed on the finished surface of the tooling fixture.

[0006] The present invention is achieved by adopting the following technical solutions: A damage-proof quick-clamping lifting tool comprises a lifting shaft, the front end face of the lifting shaft is fixedly installed with a pressure plate, and the front end of the lifting shaft is slidably installed with a clamping ring, and two first spring mounting holes are symmetrically opened on the pressure plate, and the first spring mounting hole is equipped with a first spring and a pull rod is passed through the first spring, the front end of the pull rod compresses the first spring, and the rear end thereof is fixedly connected to the clamping ring; a lifting locking rod is installed through the lifting shaft between the pressure plate and the clamping ring, and a lifting ring is provided at the end of the lifting locking rod, and an upper elliptical ring and a lower elliptical ring are fixedly provided at the upper and lower parts of the lifting locking rod respectively, and a locking slot is provided on the lower elliptical ring; a locking pin is installed on the pressure plate through a reserved hole, and the inner end of the locking pin is located in the locking slot in the locked state, and the locking pin is driven by a disassembly handle; a base plate is fixed on the rear end of the lifting shaft, and a positioning locking device is provided on the base plate.

[0007] During use, an opening is machined on the fixture to allow the upper base plate of the lifting tool of the present invention to pass through. In the initial position, the long axes of the upper and lower elliptical rings of the lifting locking rod and the end faces of the clamping ring are radially parallel. That is, under the action of the first spring, the pull rod causes the end faces of the clamping ring to contact the short axes of the upper and lower elliptical rings. In this initial position, the lifting tool is placed into the opening on the fixture. At this time, the lifting shaft is located in the opening, the clamping ring is located on the finely machined side of the fixture, and the base plate is located on the other side of the fixture. The lifting tool as a whole and the two sides of the fixture are not clamped, making it impossible to lift.

[0008] After the lifting tool is inserted into the opening of the fixture, rotate the lifting tool 90 degrees. Then rotate the lifting locking rod. During the rotation, the upper and lower elliptical ring structures of the lifting locking rod will push the clamping ring toward the fixture until they touch. At the same time, in the process of rotating the lifting locking rod, the lower elliptical ring will gradually contact the locking pin until the locking pin is completely stuck in the locking groove of the lower elliptical ring. At this time, the lifting locking rod will be locked in position and cannot rotate. At the same time, in the process of the clamping ring pressing the finishing surface of the lifting tool, the positioning locking device realizes the positioning locking of the side of the fixture, realizing the positioning locking function. After locking, the entire lifting tool will not be able to rotate.

[0009] To remove the lifting tool, move the locking pin outward until it disengages the locking slot. Continue rotating the lifting locking lever. Under the action of the first spring, the clamping ring gradually disengages from the finished surface of the fixture. Simultaneously, the positioning locking device also disengages from the side of the fixture. Continue rotating the entire lifting tool 90 degrees before completely removing it from the fixture opening.

[0010] Therefore, a plurality of openings are processed in advance on each fixture, and after the lifting tool of the present invention is passed through each opening, clamping is achieved, and then the lifting operation is performed using the lifting ring of the lifting tool.

[0011] Further preferably, a positioning and locking device is installed in the threaded hole reserved in the pressure plate. The positioning and locking device includes a locking cylinder installed in the threaded hole. A locking positioning block is installed at the bottom of the locking cylinder. The end of the locking positioning block extends out of the bottom of the locking cylinder. A second spring is installed above the locking positioning block in the locking cylinder and is then compressed by a locking gland. During use, as the lifting locking rod is rotated, the clamping ring gradually approaches the finished side surface of the fixture, and at the same time, the positioning and locking block on the positioning and locking device gradually enters the positioning groove on the other side surface of the fixture, thereby realizing the positioning and locking function.

[0012] Furthermore, the middle portion of the disassembly handle is hingedly connected to the fixed seat on the pressure plate via a pin, one end of the disassembly handle is hingedly connected to the outer end of the locking pin, and the other end of the disassembly handle presses a third spring, which is located in the third spring mounting hole of the pressure plate. When removing the lifting tool, pressing the disassembly handle will drive the locking pin 204 outward until it disengages the locking slot on the lower elliptical ring.

[0013] Further preferably, two locking slots are provided on the lower elliptical ring at 180 degrees, so that the locking pin can move inwards into the corresponding locking slot no matter which direction the lifting locking rod is rotated 90 degrees.

[0014] Further preferably, the pressure plate is fixedly mounted on the front end surface of the lifting shaft after a screw is passed through the screw mounting hole on the pressure plate.

[0015] Further preferably, the front portion of the lifting shaft is symmetrically provided with sliding planes and then formed with stop edges. The clamping ring is adapted to fit onto the sliding planes at the front of the lifting shaft, and the distance between the stop edges and the base plate is equal to the thickness of the fixture to be hoisted. This allows the clamping ring to slide stably on the lifting shaft, and when the clamping ring slides to the stop edge position, it precisely contacts and presses against the finely machined side surface of the fixture. Furthermore, the two are in surface contact, reducing wear on the finely machined surface and preventing degradation of the fixture's accuracy after multiple lifting operations.

[0016] Further preferably, the upper elliptical ring and the lower elliptical ring have the same shape and size; under normal conditions, the clamping ring contacts the upper and lower elliptical rings in the short axis direction under the action of the first spring; when the lifting locking rod rotates 90 degrees, the clamping ring is driven to slide until it is exactly located at the stop edge, and the inner end of the locking pin is exactly located in the locking slot of the lower elliptical ring.

[0017] Further preferably, the fixture is provided with an opening for the lifting shaft and the bottom plate to pass through, and a positioning groove is provided on the side of the fixture to cooperate with the positioning locking block. Two positioning locking devices are symmetrically installed on the pressure plate.

[0018] The technical solution provided by the present invention has the following advantages compared with the prior art: First, the clamping ring is used to achieve surface contact with the precision-machined side surface of the fixture to protect the positioning reference surface of the fixture.

[0019] Second, after the lifting tool is installed with the fixture, the lifting position is unique, which effectively prevents the hook of a high-rise vehicle from hitting the surface of the fixture.

[0020] Third, the lifting tool adopts a cam structure (upper and lower elliptical rings) to clamp the clamping ring and the finished surface of the tooling fixture. At the same time, a positioning locking device is used to fix the position of the other side of the tooling fixture, thereby achieving stable assembly with the tooling fixture.

[0021] Fourth, the lifting tool is easy to operate, has a reliable structure, and can be quickly assembled and disassembled with tooling fixtures, thereby improving production efficiency.

[0022] The invention has reasonable design and good practical application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0025] Figure 1 A schematic diagram showing the overall structure of the present invention from one perspective.

[0026] Figure 2 Another structural diagram showing the overall perspective of the present invention.

[0027] Figure 3 Shows a side view of the present invention.

[0028] Figure 4 express Figure 3 AA cross-sectional view.

[0029] Figure 5 Shows the left side view of the present invention.

[0030] Figure 6 express Figure 5 BB cross-sectional view.

[0031] Figure 7 It shows the schematic diagram of the lifting shaft structure.

[0032] Figure 8 Schematic diagram of the clamping ring structure.

[0033] Figure 9 It shows the schematic diagram of the lifting locking rod structure.

[0034] Figure 10 It is a schematic diagram of the pressure plate structure.

[0035] Figure 11 It shows the schematic diagram of the positioning and locking structure.

[0036] Figure 12 Represents a cross-sectional view of the positioning and locking structure.

[0037] Figure 13A schematic diagram showing the lifting tool of the present invention being inserted into an opening of a tool fixture without being clamped.

[0038] Figure 14 A schematic diagram showing the lifting tool of the present invention being inserted into an opening of a fixture, rotated 90 degrees, and then clamped.

[0039] In the figure: 1-lifting shaft, 101-sliding plane, 102-stop edge, 103-lifting locking rod, 104-lifting ring, 105-upper elliptical ring, 106-lower elliptical ring, 107-locking slot; 2-pressure plate, 201-pull rod, 202-first spring, 203-first spring mounting hole, 204-locking pin, 205-disassembly handle, 206-fixing seat, 207-pin shaft, 208-third spring, 209-third spring mounting hole, 210-screw mounting hole; 3-pressure ring; 4-base plate; 5-positioning locking device, 501-locking cylinder, 502-locking pressure cover, 503-second spring, 504-positioning locking block; 6-tooling fixture, 601-opening, 60-positioning slot; 7-screw. DETAILED DESCRIPTION

[0040] In order to more clearly understand the above-mentioned objectives, features and advantages of the present invention, the scheme of the present invention will be further described below. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0041] In the description, it should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance. It should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, removable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms based on specific circumstances.

[0042] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present invention, rather than all the embodiments.

[0043] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0044] A damage-proof quick-clamping lifting tool mainly comprises a lifting shaft 1, a pressing plate 2, a clamping ring 3, a positioning locking device 5, etc.

[0045] like Figure 1 、 2 As shown in Figures 5, 7, and 10, a pressure plate 2 is fixedly installed on the front end surface of the lifting shaft 1. In this embodiment, screws 7 are inserted into the two screw mounting holes 210 on the pressure plate 2 and then fixedly installed in the threaded holes on the front end surface of the lifting shaft 1.

[0046] like Figure 1 、 2 As shown in Figures 7 and 8, a clamping ring 3 is slidably installed on the front of the lifting shaft 1. In this embodiment, a sliding plane 101 is symmetrically provided on the front of the lifting shaft 1, and a stop edge 102 is formed. The clamping ring 3 is adapted to be mounted on the sliding plane 101 at the front of the lifting shaft 1, and the distance between the stop edge 102 and the base plate 4 is the thickness of the tooling fixture 6 to be hoisted.

[0047] like Figure 4 、 10 As shown, two first spring mounting holes 203 are symmetrically opened on the pressure plate 2, and the first spring 202 and the pull rod 201 are installed in the first spring mounting hole 203. The front end of the pull rod 201 compresses the first spring 202, and the rear end thereof is fixedly connected to the threaded hole on the clamping ring 3 through a threaded structure.

[0048] like Figure 1 、 2 As shown in Figures 9 and 10, a lifting locking rod 103 is installed through a pre-recorded hole on the lifting shaft 1, between the pressure plate 2 and the clamping ring 3. A lifting ring 104 is provided at the end of the lifting locking rod 103 for hook lifting. An upper elliptical ring 105 and a lower elliptical ring 106 are fixed to the upper and lower portions of the lifting locking rod 103, respectively. During assembly, the lifting locking rod 103 is first passed through the through hole in the lifting shaft 1 (located on the sliding plane 101) and then the lower elliptical ring 106 is secured. In this embodiment, two locking slots 107 are provided on the lower elliptical ring 106 at 180 degrees. The upper elliptical ring 105 and the lower elliptical ring 106 have the same shape and size; under normal conditions, the clamping ring 3 contacts the upper and lower elliptical rings 105 and 106 in the short axis direction under the action of the first spring 202; when the lifting locking rod 103 rotates 90 degrees, the clamping ring 3 is driven to slide and is exactly located at the stop edge 102, and the inner end of the locking pin 204 is exactly located in the locking slot 107 of the lower elliptical ring 106.

[0049] like Figure 1 、 2 As shown in Figures 6 and 7, a locking pin 204 is installed on the pressure plate 2 through a reserved hole. The inner end of the locking pin 204 is located in the locking groove 107 when locked. The locking pin 204 is driven by a disassembly handle 205. In this embodiment, the middle portion of the disassembly handle 205 is hinged to the fixed seat 206 on the pressure plate 2 via a pin shaft 207. One end of the disassembly handle 205 is hinged to the outer end of the locking pin 204. The other end of the disassembly handle 205 presses a third spring 208, which is located in a third spring mounting hole 209 of the pressure plate 2.

[0050] like Figure 11 、 12 As shown, a base plate 4 is fixed to the rear end of the lifting shaft 11, and a positioning and locking device 5 is provided on the base plate 4. In this embodiment, the positioning and locking devices 5 are respectively installed in two reserved threaded holes on the pressure plate 2, and the two positioning and locking devices 5 are symmetrically arranged. The positioning and locking devices 5 include a locking cylinder 501 installed in the threaded holes, and a locking positioning block 504 is installed at the bottom of the locking cylinder 501. The end of the locking positioning block 504 extends out of the bottom of the locking cylinder 501. A second spring 503 is installed above the locking positioning block 504 in the locking cylinder 501, and is then compressed by a locking gland 502.

[0051] During specific application, the clamping ring 2 is installed on the lifting shaft 1 and can be moved axially to perform the clamping operation. The lifting locking rod 103 is installed in the mounting hole of the lifting shaft 1, which plays the role of lifting and controlling the clamping ring 3. The pressure plate 4 is fixed to the front end face of the lifting shaft 1 by screws 7. The pull rod 201 is installed on the clamping ring 3 through a threaded structure, and the first spring 202 is installed in the first spring mounting hole 203 of the pressure plate 2. The pull rod 201 and the clamping ring 3 form an elastic structure through the first spring 202. The locking pin 204 is installed in the hole of the pressure plate 2. The disassembly handle 205 is fixed to the pressure plate 2 by the pin shaft 207, and the disassembly handle 205 and the locking pin 204 are connected by a pin hole structure.

[0052] The positioning locking device 5 consists of a locking gland 502, a locking cylinder 501, a second spring 503, and a positioning locking block 504. The locking gland 502 is threadedly mounted on the locking cylinder 501. The second spring 503 and the positioning locking block 504 are installed within the locking cylinder 501 and compressed by the locking gland 502, forming an integral structure. The positioning locking device 5 is mounted on the base plate 4 via the external threads on the locking cylinder 501.

[0053] The lifting ring 104 on the lifting locking rod 103 plays a lifting role. The lower elliptical ring 106 is welded into an integrated structure after the lifting locking rod 103 is installed as a whole. A locking slot 107 is designed on the lower elliptical ring, and the locking pin 204 is inserted into the locking slot 107 for locking and positioning.

[0054] The fixture 6 is provided with an opening 601 for the lifting shaft 1 and the base plate 4 to pass through, and a positioning groove 602 is provided on the side of the fixture 6 to cooperate with the positioning locking block 504.

[0055] The initial position of the lifting tool is as follows Figure 13As shown. In the initial position, the long axes of the upper and lower elliptical rings 105 and 106 of the lifting and locking rod 103 are radially parallel to the end surface of the clamping ring 3. Under the action of the first spring 202, the pull rod 201 makes the clamping ring 3 and the upper and lower elliptical rings contact in the direction of the short axis. In this initial position, the lifting tool is placed in the oblong hole (opening 601) on the fixture, as shown. Figure 13 As shown, the lifting shaft is located in the opening, the clamping ring is located on the finished side of the fixture, and the base plate is located on the other side of the fixture. The lifting tool as a whole and the two sides of the fixture are not clamped tightly, making lifting impossible.

[0056] After the lifting tool is inserted into the fixture, rotate the lifting tool 90 degrees. Figure 14 In the position shown, the positioning locking block 504 on the positioning locking device 5 corresponds to the positioning slot 602 of the fixture 6. During the rotation of the lifting locking rod 103, the upper and lower elliptical rings 105 and 106 of the lifting locking rod 103 will push the clamping ring 3 toward the finishing side of the fixture until it contacts. During the rotation of the lifting locking rod 103, the lower elliptical ring 106 will gradually contact the locking pin 204 until the locking pin 204 is completely stuck in the locking slot 107 of the lower elliptical ring 106. Under the action of the third spring 208, the lifting locking rod 103 will be locked in position and cannot rotate. Figure 14 During the rotation of the lifting locking rod 103, the positioning locking block 504 on the positioning locking device 5 gradually enters the positioning groove 602 of the fixture 6 to achieve the positioning locking function. After locking, the entire lifting fixture will not be able to rotate.

[0057] When removing the lifting tool, pressing the disassembly handle 205 will drive the locking pin 204 to move outward until it disengages the locking slot 107. The lifting locking rod 103 is then rotated further. Under the action of the first spring 202, the clamping ring 3 and the lifting shaft 1 gradually disengage from the fixture. Simultaneously, the positioning fixture 5 also disengages from the positioning slot 602 of the fixture 3. After rotating the entire lifting fixture 90 degrees, the lifting tool can be completely removed. This makes disassembly faster, overcoming the traditional process of loosening and tightening the lifting bolts and improving efficiency.

[0058] Therefore, a plurality of openings 601 are processed in advance on each fixture 6, and after the lifting tool of the present invention is passed through each opening 601, clamping is achieved, and then the lifting ring 104 of the lifting tool is used for lifting operations.

[0059] The above description is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Although detailed descriptions have been made with reference to the aforementioned embodiments, those skilled in the art should understand that they may still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents; and such modifications or replacements do not deviate from the essence of the corresponding technical solutions within the scope of the technical solutions of the embodiments, and they should all be included in the scope of protection of the claims.

Claims

1. A damage-proof quick-clamping lifting tool, characterized by: The invention comprises a lifting shaft (1), wherein a pressure plate (2) is fixedly installed on the front end surface of the lifting shaft (1), a clamping ring (3) is slidably installed on the front part of the lifting shaft (1), two first spring mounting holes (203) are symmetrically opened on the pressure plate (2), a first spring (202) and a pull rod (201) are installed in the first spring mounting hole (203), the front end of the pull rod (201) compresses the first spring (202), and the rear end thereof is fixedly connected to the clamping ring (3); a spring is installed on the lifting shaft (1) between the pressure plate (2) and the clamping ring (3) A lifting locking rod (103) is provided, and a lifting ring (104) is provided at the end of the lifting locking rod (103); an upper elliptical ring (105) and a lower elliptical ring (106) are fixedly provided on the upper and lower parts of the lifting locking rod (103), respectively, and a locking slot (107) is provided on the lower elliptical ring (106); a locking pin (204) is installed on the pressure plate (2) through a reserved hole, and the inner end of the locking pin (204) is located in the locking slot (107) in a locked state, and the locking pin (204) is driven by a disassembly handle (205); A base plate (4) is fixed to the rear end of the lifting shaft (11), and a positioning locking device (5) is provided on the base plate (4).

2. The damage-resistant quick-clamping lifting tool according to claim 1, characterized in that: A positioning locking device (5) is installed in a threaded hole reserved on the pressure plate (2), and the positioning locking device (5) includes a locking cylinder (501) installed in the threaded hole, a locking positioning block (504) is installed at the bottom of the locking cylinder (501), and the end of the locking positioning block (504) extends out of the bottom of the locking cylinder (501). A second spring (503) is installed above the locking positioning block (504) in the locking cylinder (501) and is then tightened by a locking cover (502).

3. A damage-resistant quick-clamping lifting tool according to claim 1 or 2, characterized in that: The middle portion of the disassembly handle (205) is hinged to the fixed seat (206) on the pressure plate (2) via a pin shaft (207), one end of the disassembly handle (205) is hinged to the outer end of the locking pin (204), and the other end of the disassembly handle (205) is pressed with a third spring (208), and the third spring (208) is located in the third spring mounting hole (209) of the pressure plate (2).

4. The damage-resistant quick-clamping lifting tool according to claim 3, characterized in that: The screw mounting hole (210) on the pressure plate (2) is penetrated by a screw (7) and then fixedly mounted on the front end surface of the lifting shaft (1).

5. The damage-resistant quick-clamping lifting tool according to claim 4, characterized in that: Two locking slots (107) are provided on the lower elliptical ring (106) at 180 degrees.

6. The damage-resistant quick-clamping lifting tool according to claim 5, characterized in that: The front of the lifting shaft (1) is symmetrically provided with a sliding plane (101) and a stop edge (102) is formed thereon. The clamping ring (3) is adapted to be mounted on the sliding plane (101) at the front of the lifting shaft (1). The distance between the stop edge (102) and the bottom plate (4) is the thickness of the fixture (6) to be hoisted.

7. The damage-resistant quick-clamping lifting tool according to claim 6, characterized in that: The upper elliptical ring (105) and the lower elliptical ring (106) have the same shape and size; under normal conditions, the clamping ring (3) contacts the upper and lower elliptical rings (105, 106) in the short axis direction under the action of the first spring 202; when the lifting locking rod (103) rotates 90 degrees, the clamping ring (3) slides to be exactly located at the stop edge (102), and the inner end of the locking pin (204) is exactly located in the locking groove (107) of the lower elliptical ring (106).

8. The damage-resistant quick-clamping lifting tool according to claim 7, characterized in that: The fixture (6) is provided with an opening (601) for the lifting shaft (1) and the base plate (4) to pass through, and a positioning groove (602) is provided on the side of the fixture (6) to cooperate with the positioning locking block (504).

9. The damage-resistant quick-clamping lifting tool according to claim 8, characterized in that: Two positioning and locking devices (5) are symmetrically mounted on the pressure plate (2).

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