Lifting cam with removable stop

Abstract

The invention discloses a lifting inclined wedge with a detachable stopper, comprising a base assembly, a slider assembly and a driving assembly; the base assembly comprises a base and a limiting side plate, a slide groove is arranged on the base, a stopper is detachably arranged at the open end of the slide groove, and a buffer is arranged on the stopper; the slider assembly comprises a slider and a spring; a guide structure is arranged between the top surface of the slider and the bottom surface of the slide groove, and between the two side surfaces and the two side surfaces of the slide groove; the stopper is provided with a stopper boss and a nut seat, and the nut seat is fixed to the base by screws; the stopper boss is arranged on the upper part of the stopper, matched and installed in the groove on the base, and can withstand the component force in the horizontal or vertical direction; the driving assembly comprises a driving block, and the slider and the driving block are guided by a first V-shaped guide plate and a second V-shaped guide plate. The lifting inclined wedge has the advantages of convenient disassembly and assembly, and greater impact and lateral force resistance.

Description

Technical Field

[0001] The invention relates to an inclined wedge, in particular to a lifting inclined wedge with a detachable stop block. Background Art

[0002] The cam mechanism is a mechanical mechanism that changes vertical motion into horizontal motion or tilting motion, and is widely used in the mold industry. As molds become more and more mature in the automotive manufacturing industry, mold costs and quality control requirements are also getting higher and higher, which in turn puts forward higher requirements on the space occupation, load-bearing capacity (including blanking force, lateral force, punching speed and cam material, strength, etc.), working surface size, return force size, and convenience of cam maintenance of the cam.

[0003] like Figure 1 As shown, the existing wedge mechanism currently available on the market generally consists of three parts: a base assembly 100, a slider assembly 200 and a drive assembly 300. The upper part of the slider assembly 200 is installed in the concave slide groove of the base assembly 100, and the slider contacts and guides the bottom surface of the concave slide groove through the guide surface at the top. The concave slide groove is concave along the length direction, and the protruding parts at both ends limit the upper and lower stop points of the slider assembly 200.

[0004] The above structure has the advantages of simple structure, easy processing and strong punching force, but it also has the following disadvantages: 1) Due to the limiting effect of the concave slide groove, the slider cannot be removed from the rear along the sliding direction, which brings inconvenience to the maintenance of the wedge; 2) The slider is only provided with a guide surface on the bottom surface and cannot withstand lateral force; 3) The height of the driving component is large, and the robot cannot pass through, or needs to detour; 4) The mounting surface of the pressing end of the slider is small, which cannot meet the requirements of the mold for installing more tools on the wedge; 5) The slider stroke is designed according to ST (the sliding distance of the slider along the guide surface of the base) as an integer, resulting in the slider working stroke WT (the sliding distance of the slider along the driving block) calculated based on the trigonometric relationship being a decimal, which is inconvenient for customers to use and is prone to error accumulation due to decimal rounding. Summary of the invention

[0005] The object of the present invention is to provide a lifting wedge with a detachable stop block which has a compact structure and is easy to assemble and disassemble.

[0006] To achieve the above-mentioned purpose, the lifting inclined wedge with a detachable stop block designed by the present invention comprises a base assembly, a slider assembly and a driving assembly; the base assembly comprises a base and a limiting side plate, a slide groove is arranged on the base, one end of the slide groove is closed, and the other end is arranged to be open, and a stop block is detachably arranged at the open end; a buffer for buffering the retracted slide block is arranged on the side of the stop block facing the slide groove; the slide block assembly comprises a slide block and a spring for providing a retracting force for the slide block; the upper part of the slide block is installed in the slide groove of the base, one end of the spring is fixed on the slide block, and the other end is against the closed end of the slide groove; between the top surface of the slide block and the bottom surface of the slide groove, and between the two side surfaces and the two sides of the slide groove A guide slide structure is arranged between the side surfaces; the guide slide structure is a guide plate installed on the slide groove or the slider, or a self-lubricating structure arranged on the surface of the slide groove or the slider; the stop block is provided with a stop boss and a nut seat, and the nut seat is fixed to the base by a screw; the stop boss is arranged on the upper part of the stop block and matched to be installed in the groove on the base, and the stop block can withstand the component force in the horizontal or vertical direction through the stop boss; the driving assembly includes a driving block; a first V-shaped guide plate is arranged at the lower part of the slider, and a second V-shaped guide plate matching the concave and convex of the first V-shaped guide plate is arranged at the upper part of the driving block, and the slider and the driving block are guided by the first V-shaped guide plate and the second V-shaped guide plate.

[0007] Optionally, there are two structures of the stop block, one is a hanging table type and the other is a boss type. For the hanging table type stop block, the protruding direction of its stop boss is horizontal, and it is matched and installed in the groove with a horizontal opening on the base, forming a limit in the vertical direction and can withstand the component force in the vertical direction. For the boss type stop block, its protruding direction is vertical, and it is matched and installed in the groove with a vertical opening on the base, forming a limit in the horizontal direction and can withstand the component force in the horizontal direction. In specific applications, the type of stopper can be selected as follows: when the angle between the bottom surface of the slideway and the horizontal plane is above 45 degrees, a hanging table type stopper is used, the impact force is decomposed into a larger vertical force, the vertical force is borne by the stop boss, and the bearing capacity is strong, and the horizontal force is borne by the pin part of the positioning screw, which not only bears the horizontal force but also prevents horizontal displacement; when the angle between the bottom surface of the slideway and the horizontal plane is below 45 degrees, a boss type stopper is used, the impact force is decomposed into a larger horizontal force and a smaller vertical force. When the angle is 0 degrees, the impact force has only a horizontal force component and no vertical force component. The horizontal force component is borne by the stop boss, and the bearing capacity is strong. When the base angle is not 0 degrees, the smaller vertical force component is borne by the positioning screw. When the angle between the bottom surface of the slideway and the horizontal plane is 45 degrees, you can choose a hanging table type stopper or a boss type stopper.

[0008] Preferably, for an inclined wedge with a wider working surface (eg, greater than 130 mm), two of the first V-shaped guide plates and two of the second V-shaped guide plates are respectively installed on the sliding block and the driving block to improve the ability to withstand lateral forces.

[0009] Preferably, for an inclined wedge with a wider working surface (for example, more than 160 mm), two parallel guide plates are used between the top of the slider and the bottom of the slide groove for sliding guidance, and a guide key is provided between the two guide plates to improve the guiding accuracy.

[0010] Preferably, the working surface of the slider adopts a maximum width design, that is, the working surface width is equal to the slider width, the base width and the driving block width. While obtaining the maximum working surface width of the same width inclined wedges, it is also convenient to design inclined wedges with various working surface width specifications.

[0011] Preferably, a base reference hole is provided on the base, and a slider reference hole is provided on the slider. After installing positioning pins in the base reference hole and the slider reference hole, the slider can be locked at the bottom dead point, which can improve the consistency of the base assembly and the slider assembly during assembly, and can also more accurately lock the bottom dead point position of the bevel wedge, thereby improving the accuracy of the bevel wedge follow-up processing.

[0012] Preferably, the spring is a nitrogen spring, and a nitrogen spring with as large a spring force as possible can be selected within the range allowed by the installation size to maximize the rebound force and facilitate the pressing operation.

[0013] Preferably, the working stroke of the slider is set to an integer to avoid error accumulation due to decimal rounding, and also to facilitate customers to design the distance in the blanking direction.

[0014] Preferably, the cross section of the limiting side plate is L-shaped, with its longer side fixedly mounted on the two side surfaces of the base, and its shorter side constituting a limit with the limiting bosses on both sides of the slider to prevent the slider from escaping from the slide groove.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1) The detachable stop block design is adopted. After removing the stop block, the slider assembly can be taken out along the slide groove for follow-up processing and maintenance;

[0017] 2) A buffer is provided on the stop block to buffer the impact force when the slider moves back to avoid damage to the slider or the stop block;

[0018] 3) The stop block decomposes the impact force of the slider when it retreats into vertical and horizontal forces, which can withstand greater impact force. At the same time, a stop boss that can withstand horizontal or vertical forces is provided on the stop block, which further improves the ability to withstand impact;

[0019] 4) The side of the slider participates in the sliding guide, and the sliding guide area is large, which can bear greater lateral force;

[0020] 5) The slider and the driving block are guided by a V-shaped guide plate, which has high guiding accuracy and can withstand a certain lateral force.

[0021] 6) The lifting wedge can be designed into a variety of specifications. For example, the working surface width ranges from 60mm to 400mm, divided into 10 widths, and the angle of each width wedge ranges from 0 degrees to 75 degrees, 5 degrees at a time, divided into 16 angles in total. A total of 160 wedges are designed, which greatly enriches the customer's choices. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the existing lifting wedge.

[0023] Figure 2 This is a schematic diagram of the three-dimensional structure of the lifting wedge designed for Example 1 of the present invention.

[0024] Figure 3 for Figure 2 Exploded view of the lifting wedge.

[0025] Figure 4 for Figure 2 Cross-sectional view of the middle lifting wedge along the symmetry plane.

[0026] Figure 5 , Figure 6 for Figure 2 Schematic diagram of the mid-lift wedge removal stop block and slider assembly.

[0027] Figure 7 A schematic diagram of the three-dimensional structure of the lifting wedge designed for embodiment 2 of the present invention.

[0028] Figure 8 for Figure 7 Exploded view of the lifting wedge.

[0029] Fig. 9 for Figure 7 Cross-sectional view of the middle lifting wedge along the symmetry plane.

[0030] Fig.10 This is a schematic diagram of the three-dimensional structure of the lifting wedge designed for Example 3 of the present invention.

[0031] Fig.11 for Fig.10 Exploded view of the lifting wedge.

[0032] Fig.12 for Fig.10 Schematic diagram of the three-dimensional structure of the middle base.

[0033] Fig.13Schematic diagram of the triangular relationship of the slider working stroke.

[0034] Among them: base assembly 100, base 110, slide groove 120, limiting side plate 130, stop block 140, stopping inclined surface 141, buffer 142, stopping boss 143, nut seat 144, positioning screw 145, base reference hole 150, slider assembly 200, slider 210, slider socket 211, limiting boss 212, spring 220, first V-shaped guide plate 230, slider reference hole 240, forced returner 250, drive assembly 300, drive block 310, second V-shaped guide plate 320, guide structure 400, guide plate 410, self-lubricating structure 420, guide key 430 DETAILED DESCRIPTION

[0035] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] like Figure 1 The figure shows an existing lifting wedge, the structure of which has been described in detail in the background technology and will not be repeated here.

[0037] Example 1

[0038] like Figures 2 to 6 As shown, this embodiment discloses a lifting wedge with a working surface width of 100 mm and a hanging table stop block. The lifting wedge includes a base assembly 100, a slider assembly 200 and a drive assembly 300. Among them:

[0039] The base assembly 100 includes a base 110 and a limiting side plate 130. The base 110 is provided with a slide groove 120. One end of the slide groove 120 is closed and the other end is open. A stopper 140 is detachably provided at the open end. A rubber buffer 142 is provided on the side of the stopper 140 facing the slide groove 120 for buffering the retracted slider 210.

[0040] The slider assembly 200 includes a slider 210, a spring 220 (using a nitrogen spring), a first V-shaped guide plate 230 and a forced returner 250. The upper part of the slider 210 is installed in the slide groove 120 of the base 110. One end of the spring 220 is fixed in the slider socket 211 at the upper end of the slider 210 by screws, and the other end is pressed against the closed end of the slide groove 120. A guide structure 400 is provided between the top surface of the slider 210 and the bottom surface of the slide groove 120, and between the two side surfaces and the two side surfaces of the slide groove 120. The guide structure includes a guide plate 410 and a self-lubricating structure 420. Specifically, the guide plate 410 is installed at the bottom of the slide groove 120 by screws, and graphite-embedded self-lubricating structures 420 are provided on both sides of the slider.

[0041] The driving assembly 300 includes a driving block 310 and a second V-shaped guide plate 320. The first V-shaped guide plate 230 is in a concave V shape and is fixed to the lower part of the slider 210 by screws at an angle of 150 degrees; the second V-shaped guide plate 320 is in a convex V shape that matches the concave and convex of the first V-shaped guide plate 230 and is fixed to the upper part of the driving block 310 by screws at an angle of 150 degrees. The first V-shaped guide plate 230 and the second V-shaped guide plate 320 cooperate with each other to guide the sliding of the slider 210 along the driving block 310.

[0042] The forced returner 250 is installed on the two side surfaces of the slider 210 with screws. When the inclined wedge retreats, the forced returner hooks on the driving block 310 and forces the slider 210 to retreat along the guide surface of the driving block 310.

[0043] As a further implementation scheme, a stop boss 143 and a nut seat 144 are provided at the lower portion of the stop block 140, and the nut seat 144 is fixed to the base 110 by a positioning screw 145 tightened from bottom to top. The stop boss 143 is provided at the upper portion of the stop block 140, and is matched and installed in the groove on the base 110. There are two types of structures of the stop block 140, one is a hanging table type, and the other is a boss type. In this embodiment, the angle between the bottom surface of the slide groove and the horizontal direction is greater than 45 degrees, so a hanging table type stop block is adopted, and the protruding direction of the stop boss 143 is the horizontal direction, and the opening direction of the matching groove on the base 110 is the horizontal direction. After assembly, the stop boss 143 is equivalent to being hung on the base 110, constituting a limit in the vertical direction, and therefore can withstand a larger component of force in the vertical direction. As Figures 5-6 As shown, when the slider assembly 200 needs to be disassembled, first unscrew the positioning screw 145, remove the stop block 140, and then push the slider assembly 200 out along the slide groove 120 to complete the disassembly.

[0044] As a further implementation scheme, the working surface of the slider 210 is designed with the maximum width, that is, the working surface width is equal to the width of the slider 210, the width of the base 110 and the width of the driving block 310. While obtaining the maximum working surface width of the same width wedge, it is also convenient to design a variety of working surface width specifications of the wedge. The working surface is used to install tools such as punches and inserts. The larger the working surface, the more things can be installed. When the customer uses it, if more tools can be installed, it may save a process.

[0045] As a further implementation scheme, the cross-section of the limiting side plate 130 is L-shaped, and its longer side is fixed to the two side surfaces of the base 110 with screws, and the shorter side and the limiting bosses 212 on both sides of the slider 210 form a limit to prevent the slider 210 from detaching from the slide groove 120.

[0046] As a further implementation scheme, a base reference hole 150 is provided on the base 110 (also provided on the limiting side plate 130 and the side of the slide groove), and a slider reference hole 240 is provided on the slider 210. After installing positioning pins in the base reference hole 150 and the slider reference hole 240, the slider 210 can be locked at the bottom dead point, which can improve the consistency of the base assembly 100 and the slider assembly 200 during assembly, and can also more accurately lock the bottom dead point position of the bevel wedge, thereby improving the accuracy of the bevel wedge follow-up processing.

[0047] As a further implementation scheme, the working stroke of the slider 210 is set to an integer to reduce the error accumulation caused by decimal rounding, and also facilitate customers to design the distance in the blanking direction. The working stroke of the wedge refers to the sliding distance of the slider along the specified angle (i.e., the working angle). The working stroke WT and ST (the sliding distance of the slider along the guide surface of the base) and PT (the vertical movement distance of the base) are shown in Fig.13 , α and β are the angles between the driving guide surface and the horizontal direction and between the base guide surface and the horizontal direction, respectively. These form a triangular relationship. If α, β and ST are known, the working stroke WT can be obtained. For existing wedges, the working stroke is calculated by α, β and ST. ST is an integer, so WT is a decimal, which brings troubles to customers. For this reason, this embodiment gives priority to the convenience of customer use, sets WT as an integer, and then calculates ST based on the triangular relationship, avoiding the error accumulation caused by WT being a decimal, and also facilitates customers to design the blanking direction distance.

[0048] The pressure process of the lifting wedge is briefly described as follows: when pressing the material, the guide plate contacts and guides the slider, and the force is transmitted from the base to the guide plate and then to the slider; when there is lateral force on the slider, the lateral force is transmitted to the side of the inner cavity of the base through the slider; after the slider assembly contacts the drive assembly, the slider assembly moves along the guide surface of the drive assembly; when the wedge returns, the nitrogen spring provides a retraction force, and when the slider assembly retracts to a certain position, the stop block prevents it from moving.

[0049] Example 2

[0050] like Figures 7 to 9 As shown, this embodiment discloses a lifting wedge with a working surface width of 100 mm and a boss-type stop block.

[0051] The angle between the bottom surface of the inclined wedge slide groove and the horizontal direction is less than 45 degrees, so a boss-type stop block is adopted. The protruding direction of the stop boss 143 is vertically upward. At the same time, vertical upward bosses are also provided on the upper ends of both sides of the nut seat 144. The upper and lower bosses are respectively in the grooves opening vertically downward on the base 110, forming a horizontal limit, which greatly improves the bearing strength in the horizontal direction.

[0052] The rest is the same as Example 1.

[0053] Example 3

[0054] like Figures 10-12 As shown, this embodiment discloses a lifting wedge with a working surface width of 350 mm and a hanging table stop block.

[0055] Since the working surface is wide, in order to ensure the stability of the lateral sliding, this embodiment has made the following improvements on the basis of embodiment 1:

[0056] 1) The guide structure 400 includes four guide plates 410 and a guide key 430. Two parallel guide plates 410 are used for guide sliding between the top of the slider 210 and the bottom of the slide groove 120. At the same time, a guide key 430 is arranged between the two guide plates 410 to improve the guide accuracy. The guide key 430 is installed on the bottom keyway of the slide groove 120 with screws and is matched with the keyway clearance at the top of the slider 210. The guide key not only increases the guide accuracy, but also increases the ability of the wedge to withstand lateral force; at the same time, guide plates 410 are also arranged on both sides of the slider, and the four guide plates are fixed by screws.

[0057] 2) Two first V-shaped guide plates 230 and two second V-shaped guide plates 320 are respectively installed on the slider 210 and the driving block 310 to improve the ability to withstand lateral forces.

[0058] The rest is the same as Example 1.

[0059] The following is a supplementary description of the design ideas and advantages of the lifting wedge disclosed in Examples 1 to 3 of the present invention:

[0060] 1) Removable stop block design: After removing the stop block, the slider assembly can be taken out along the slide groove for follow-up processing and maintenance.

[0061] 2) The stop block structure has strong bearing capacity: The stop block structure decomposes the sliding block retraction impact force into vertical and horizontal components, and adopts different stop boss designs for different wedge angles to improve the bearing strength.

[0062] 3) The inclined wedge can bear a large lateral force: the bottom and side surfaces of the slider assembly and the base assembly are in contact with the guide sliding, and the guide sliding area is large, which can bear a large lateral force. When the width of the slide groove is large, the guide key on the base can increase the lateral force bearing capacity.

[0063] 4) Maximized mounting surface: Compared with the wedge of the same width, the mounting surface of the slider is maximized, and more and larger tools can be installed, thus saving processes for the mold.

[0064] 5) Compact structure and few parts: This lifting wedge takes up less space, which can save space for the mold. It has fewer small parts and is convenient for the maintenance and replacement of the wedge parts.

[0065] 6) Large bearing capacity: The sliding area of ​​the inclined wedge guide is maximized, the base and drive backrest heights at different angles are optimized, and the slider angle is rationalized to maximize the bearing capacity of the entire inclined wedge.

[0066] 7) High positioning accuracy: The base reference hole and the slider reference hole are in the same position, which can improve the assembly consistency of the base assembly and the slider assembly, and can also more accurately lock the bottom dead point position of the wedge, thereby improving the accuracy of the wedge follow-up processing.

[0067] 8) The closing height of the wedge is minimized to save vertical space for the mold; the highest point of the drive assembly is minimized to avoid the robot being unable to pass through or to avoid wasting time due to a long robot stroke.

[0068] 9) The working stroke is an integer, which reduces the error accumulation caused by rounding off decimals and is also convenient for customers to design the distance in the blanking direction.

[0069] 10) The lifting wedge can be designed into a variety of specifications. For example, the working surface width ranges from 60mm to 400mm, which is divided into 10 widths. The angle of each width wedge ranges from 0 degree to 75 degree, with a 5-degree step, and a total of 16 angles. A total of 160 wedges can be designed, which greatly enriches the customer's choices; among them, the working stroke of the angle of 0 degree to 20 degree is 30mm, the working stroke of the angle of 25 degree to 35 degree is 40mm, and the working stroke of the angle of 40 degree to 75 degree is 50mm.

Claims

1. A lifting wedge with a detachable stop block, comprising a base assembly (100), a slider assembly (200) and a drive assembly (300); characterized in that: The base assembly (100) comprises a base (110) and a limiting side plate (130); a slide groove (120) is arranged on the base (110); one end of the slide groove (120) is closed and the other end is arranged to be open, and a stop block (140) is detachably arranged at the open end; a buffer (142) for buffering the retracted slider (210) is arranged on a side of the stop block (140) facing the slide groove (120); The slider assembly (200) comprises a slider (210) and a spring (220) for providing a retraction force for the slider (210); the upper portion of the slider (210) is mounted in a slide groove (120) of a base (110); one end of the spring (220) is fixed in a slider socket (211) at the upper end of the slider (210), and the other end is pressed against a closed end of the slide groove (120); a guide structure (400) is provided between the top surface of the slider (210) and the bottom surface of the slide groove (120), and between the two side surfaces and the two side surfaces of the slide groove (120); the guide structure (400) is a guide plate (410) mounted on the slide groove (120) or the slider (210), or a self-lubricating structure (420) provided on the surface of the slide groove (120) or the slider (210); The stop block (140) is provided with a stop boss (143) and a nut seat (144), and the nut seat (144) is fixed on the base (110) by a positioning screw (145); the stop boss (143) is arranged on the upper part of the stop block (140) and is matched and installed in a groove on the base (110), and the stop block (140) can withstand a component force in a horizontal or vertical direction through the stop boss (143); The driving assembly (300) comprises a driving block (310); a first V-shaped guide plate (230) is arranged at the lower part of the sliding block (210), a second V-shaped guide plate (320) matching the first V-shaped guide plate (230) is arranged at the upper part of the driving block (310), and the sliding block (210) and the driving block (310) are guided by the first V-shaped guide plate (230) and the second V-shaped guide plate (320); The base (110) is provided with a base reference hole (150), and the slider (210) is provided with a slider reference hole (240). After positioning pins are installed in the base reference hole (150) and the slider reference hole (240), the slider (210) can be locked at the bottom dead point.

2. The lifting wedge with a detachable stop block according to claim 1, characterized in that: The stop boss (143) protrudes in the horizontal direction and is matched and installed in a groove opened in the horizontal direction on the base (110), constituting a limit in the vertical direction and being able to withstand the component force in the vertical direction.

3. The lifting wedge with a detachable stop block according to claim 1, characterized in that: The stop boss (143) protrudes in the vertical direction and is matched and installed in a groove opened in the vertical direction on the base (110) to form a horizontal limit.

4. The lifting wedge with a detachable stop block according to claim 1, characterized in that: For an inclined wedge with a wider working surface, two of the first V-shaped guide plates (230) and two of the second V-shaped guide plates (320) are respectively installed on the sliding block (210) and the driving block (310).

5. The lifting wedge with a detachable stop block according to claim 1, characterized in that: For an inclined wedge with a wider working surface, two parallel guide plates (410) are used to guide the sliding between the top of the slider (210) and the bottom of the slide groove (120), and a guide key (430) is provided between the two guide plates (410).

6. The lifting wedge with a detachable stop block according to any one of claims 1 to 5, characterized in that: The working surface of the slider (210) is designed to have a maximum width, that is, the width of the working surface is equal to the width of the slider (210), the width of the base (110), and the width of the driving block (310).

7. The lifting wedge with a detachable stop block according to any one of claims 1 to 5, characterized in that: The spring (220) is a nitrogen spring.

8. The lifting wedge with a detachable stop block according to any one of claims 1 to 5, characterized in that: The working stroke of the slider (210) is set to an integer.

9. The lifting wedge with a detachable stop block according to any one of claims 1 to 5, characterized in that: The cross section of the limiting side plate (130) is L-shaped, with its longer side fixedly mounted on the two side surfaces of the base (110), and its shorter side and the limiting bosses (212) on both sides of the slider (210) forming a limit to prevent the slider (210) from escaping from the slide groove (120).

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