A spade head snap ring installation device

Abstract

The utility model relates to tool processing technical field, the utility model provides a spade head snap ring mounting device, it includes frame, lower support piece opposite frame lift setting, extrusion piece lift setting is on the lower support piece, the lower support piece is with extrusion piece is located in the same vertical to horizontal direction straight line, the extrusion piece drops and is used for extruding deformation to the diameter reduction of the connecting end of spade head and handle connecting place, is used for installing the snap ring, the connecting end has the gap, when the minimum of gap, the snap ring is connected on the connecting end. The technical problem of inconvenient snap ring installation in the prior art is solved.

Description

Technical Field

[0001] This utility model relates to the field of tool processing technology, specifically to a shovel head retaining ring installation device. Background Technology

[0002] During the use of shovels, the loosening or detachment of the connection between the handle and the shovel head is a core safety hazard. To improve safety, a retaining ring can be added to the outside of the connection between the two to prevent the handle from moving axially or radially. However, traditional retaining ring installation methods suffer from problems such as rough operation, insufficient fixing precision, and poor adaptability, making it difficult for the retaining ring to fully perform its anti-detachment function. On the contrary, improper installation can lead to residual safety hazards and restrict the efficiency of mass production of shovels, becoming a key bottleneck affecting the safety and economic efficiency of shovel use. Utility Model Content

[0003] To overcome the above-mentioned defects, the present invention provides a shovel head retaining ring installation device, which solves the technical problem of inconvenient retaining ring installation in the prior art.

[0004] According to one aspect, at least one embodiment of the present invention provides a shovel head retaining ring mounting device, comprising: frame; A lower support member, which is vertically adjustable relative to the frame; An extrusion member is provided, which is raised and lowered on the lower support member. The lower support member and the extrusion member are located on the same straight line perpendicular to the horizontal direction. After the extrusion member is lowered, it is used to extrude and deform the connecting end of the shovel head and the handle to reduce the diameter for installing a retaining ring. The connecting end has a clearance gap. When the clearance gap is at its minimum, the retaining ring is engaged with the connecting end.

[0005] As a further technical solution, it also includes: Two side supports are rotatably mounted on the frame and symmetrically arranged along the line where the lower support and the extruder are located, to limit the horizontal position of the shovel head when the extruder descends.

[0006] As a further technical solution, the extruder has a V-shaped extrusion section, which is used to extrude the connecting end.

[0007] As a further technical solution, the V-shaped extrusion part has a first pressing part and a second pressing part. The thickness of the first pressing part is greater than the thickness of the second pressing part. After the V-shaped extrusion part is pressed down, the first pressing part first contacts the connecting end on one side of the relief seam, so that the structures on both sides of the relief seam cross and overlap.

[0008] As a further technical solution, it also includes: A linear drive unit, the output end of which is connected to the extruder, is used to drive the extruder to rise and fall.

[0009] As a further technical solution, both ends of the extruder have sliding portions, and the frame also has a slide rail portion, with the sliding portions slidably disposed on the slide rail portion.

[0010] As a further technical solution, it also includes: A lead screw is provided through the lower side of the frame, and a lower support member is rotatably mounted on the upper end of the lead screw. The lead screw is used to drive the lower support member to rise and fall.

[0011] As a further technical solution, the side support is cylindrical, and the outer peripheral surface of the side support is used to abut against the outer peripheral surface of the connecting end.

[0012] As a further technical solution, the linear drive component and the extrusion component are connected by a pin.

[0013] As a further technical solution, the lower support member has a V-shaped support portion.

[0014] The beneficial effects of this utility model are as follows: In this invention, the frame provides an installation reference and stable support for the lower support and the extrusion component, ensuring the rigidity of the entire device during operation. The lower support is adjustable relative to the frame and is used to support the connection end of the shovel head and handle. The lifting mechanism adapts to the positioning requirements of different specifications of connection ends. The extrusion component is raised and lowered directly above the lower support and is coaxial with the lower support (on the same straight line perpendicular to the horizontal direction). It is used to extrude the connection end to deform it. The connection end has a built-in clearance groove to provide space for extrusion deformation, which is the core prerequisite for achieving diameter reduction and snap-fit ​​connection.

[0015] According to the specifications of the connection end between the shovel head and the handle, adjust the lifting height of the lower support component to position the connection end directly below the extrusion component. The extrusion component moves downward, applying axial pressure to the connection end, causing it to shrink and deform along the clearance joint, with the diameter decreasing synchronously. When the clearance joint shrinks to its minimum state, the diameter of the connection end reaches the appropriate size for the snap ring installation, and the snap ring engages with the connection end, completing the fixed installation. This solution has a simple and efficient structure, completing the installation in two steps: "positioning + extrusion." It has no complex transmission mechanism, is easy to operate, and has a low failure rate. The coaxial design of the lower support component and the extrusion component ensures that the extrusion force is transmitted axially, the deformation of the connection end is uniform, and the snap ring engagement position is precise. By adjusting the lifting height of the lower support component, it can adapt to shovel heads and handle connection ends of different diameters and lengths without the need to change special molds. The snap ring is locked by the deformation and shrinkage of the connection end itself, combined with the limiting effect of the clearance joint, making the snap ring less likely to loosen or fall off, resulting in high connection reliability. Suitable for mass production of various shovels (shovels, garden shovels, etc.), it is specially designed for the installation of retaining rings at the connection end of the shovel head and handle. It is especially suitable for connection end structures with clearance gap design, which can greatly improve the installation efficiency and connection quality of retaining rings. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this utility model and these drawings without any creative effort.

[0017] Figure 1 This is a schematic diagram of the structure in one embodiment of the present invention; Figure 2 for Figure 1 Another perspective structural diagram in the embodiment; In the diagram: frame-1, slide rail-101, lower support-2, V-shaped support-201, extrusion part-3, V-shaped extrusion part-301, first pressing part-302, second pressing part-303, sliding part-304, side support-4, linear drive-5, lead screw-6. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit its scope.

[0019] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0020] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0022] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] like Figures 1-2As shown, this invention illustrates a shovel head retaining ring installation device according to one embodiment of the present invention, including a frame 1, a lower support 2 that is raised and lowered relative to the frame 1, and a pressing member 3 that is raised and lowered on the lower support 2. The lower support 2 and the pressing member 3 are located on the same straight line perpendicular to the horizontal direction. After the pressing member 3 descends, it is used to press and deform the connecting end of the shovel head and the handle to reduce its diameter for installing the retaining ring. The connecting end has a clearance gap. When the clearance gap is at its minimum, the retaining ring is engaged with the connecting end.

[0025] In this embodiment, the frame 1 provides an installation reference and stable support for the lower support 2 and the extrusion member 3, ensuring the rigidity of the entire device during operation. The lower support 2 is adjustable relative to the frame 1 and is used to support the connection end of the shovel head and the handle. It can be adjusted by lifting to meet the positioning requirements of different specifications of connection ends. The extrusion member 3 is raised and lowered directly above the lower support 2 and is coaxial with the lower support 2 (on the same straight line perpendicular to the horizontal direction). It is used to extrude the connection end to deform it. The connection end has a clearance gap to provide space for extrusion deformation, which is the core prerequisite for achieving diameter reduction and snap-fit ​​connection.

[0026] According to the specifications of the connection end between the shovel head and the handle, adjust the lifting height of the lower support 2 to position the connection end directly below the extrusion 3. The extrusion 3 moves downward, applying axial pressure to the connection end, causing it to shrink and deform along the clearance joint, with the diameter decreasing synchronously. When the clearance joint shrinks to its minimum state, the diameter of the connection end reaches the appropriate size for the snap ring installation, and the snap ring snaps into the connection end, completing the fixed installation. This solution has a simple and efficient structure, completing the installation in two steps: "positioning + extrusion." It has no complex transmission mechanism, is easy to operate, and has a low failure rate. The coaxial design of the lower support 2 and the extrusion 3 ensures that the extrusion force is transmitted axially, the deformation of the connection end is uniform, and the snap ring snaps into the correct position. By adjusting the lifting height of the lower support 2, it can adapt to shovel heads and handle connection ends of different diameters and lengths without the need to change special molds. The snap ring is locked by the deformation and shrinkage of the connection end itself, combined with the limiting effect of the clearance joint, making the snap ring less likely to loosen or fall off, resulting in high connection reliability. Suitable for mass production of various shovels (shovels, garden shovels, etc.), it is specially designed for the installation of retaining rings at the connection end of the shovel head and handle. It is especially suitable for connection end structures with clearance gap design, which can greatly improve the installation efficiency and connection quality of retaining rings.

[0027] Furthermore, it also includes two side support members 4, which are rotatably mounted on the frame 1 and symmetrically arranged along the line where the lower support member 2 and the extruder 3 are located, to limit the horizontal position of the shovel head when the extruder 3 descends.

[0028] In this embodiment, the two side supports 4 are symmetrically arranged along the extrusion axis and rotate to fit the two sides of the shovel head, forming a horizontal bidirectional limit. This prevents the shovel head from shifting left or right or wobbling when the extrusion component 3 descends. Compared with a fixed limit structure, this reduces scratches. The side supports fit the sides of the shovel head, dispersing the lateral stress during extrusion and preventing the edge of the shovel head from deforming or being damaged due to excessive local stress, thus improving the shovel head's integrity rate.

[0029] The vertical positioning of the lower support component 3, the coaxial pressure of the extrusion component 2, and the horizontal limiting of the double-sided supports form a three-dimensional positioning system of "up and down-left and right". This ensures that the connecting end is always in the center of the extrusion axis, the extrusion force is transmitted without deviation, the deformation uniformity of the connecting end is improved, the position error of the retaining ring is reduced, and the problem of retaining ring loosening due to positioning deviation is avoided. The three-dimensional positioning reduces the time for manual adjustment, and the shovel head does not deviate or get damaged during the extrusion process, thus improving the success rate of single installation. The side support component 4 rotates automatically without additional debugging, improving the efficiency of retaining ring installation at a single station and adapting to the needs of mass production. The scale-type side support distributes the lateral force during extrusion, reduces the stress loss of the lower support component 2 and the extrusion component 3, extends the service life, reduces the overall failure rate of the device, and further reduces maintenance costs.

[0030] Furthermore, the extrusion member 3 has a V-shaped extrusion section 301, which is used to extrude the connecting end.

[0031] In this embodiment, the V-shaped structure of the V-shaped extrusion part 301 focuses the pressure through the inclined surfaces on both sides, concentrating the extrusion force on the circumference of the connecting end, avoiding the pressure dispersion caused by planar extrusion, causing the connecting end to shrink directionally along the relief seam, improving the deformation accuracy. The V-shaped opening has a self-centering characteristic, which can automatically fit connecting ends of different diameters (20-50mm), and can adapt to various specifications without changing the extrusion head. Compared with the fixed diameter extrusion structure, the adaptation range is widened. The V-shaped inclined surface is in line contact with the connecting end, and the pressure transmission is stable, avoiding cracking or uneven deformation of the connecting end caused by local stress concentration, thus improving the integrity rate of the connecting end.

[0032] Furthermore, the V-shaped extrusion part 301 has a first pressing part 302 and a second pressing part 303. The thickness of the first pressing part 302 is greater than the thickness of the second pressing part 303. After the V-shaped extrusion part 301 is pressed down, the first pressing part 302 first contacts the connecting end on one side of the relief seam, so that the structures on both sides of the relief seam cross and overlap.

[0033] In this embodiment, the first pressing part 302 is thicker. When pressed down, it first contacts the connecting end on one side of the relief seam, forcing the structure on that side to deform first, and then guiding the structure on the other side of the relief seam to cross and overlap with it. The overlap alignment accuracy is high, avoiding the inability to install small-diameter retaining rings due to the contact of the two side structures. The thickness difference forms an orderly extrusion logic of "pressing one side first and then the other side", making the shrinkage of the connecting end along the relief seam more regular, avoiding the deformation disorder caused by simultaneous extrusion, improving the consistency of diameter reduction, and reducing the overlap error.

[0034] Furthermore, it also includes a linear drive 5, the output end of which is connected to the extruder 3 and is used to drive the extruder 3 to rise and fall.

[0035] In this embodiment, the linear drive (preferably a cylinder or electric push rod) provides a continuous and uniform axial driving force with a pressure adjustment range of 5-50kN, avoiding pressure fluctuations caused by manual or unstable driving and ensuring consistent deformation of the connection end. Through closed-loop control of the drive stroke, the extrusion stroke adjustment accuracy is improved, which can accurately match the diameter reduction requirements of different connection ends without the need for repeated manual adjustments. The reduced drive response time enables automatic lifting and lowering cycles, replacing manual operation, improving single-station installation efficiency, and eliminating the need for direct manual contact with the extrusion area. Operation can be completed through the control system, avoiding the risk of hand injury during extrusion and significantly improving operational safety.

[0036] Furthermore, both ends of the extruder 3 have sliding portions 304, and the frame 1 also has a slide rail portion 101, with the sliding portions 304 slidably disposed on the slide rail portion 101.

[0037] In this embodiment, the sliding part 304 and the slide rail part 101 are precisely matched to force the extruder 3 to rise and fall in the vertical direction, avoiding skewness or swaying, reducing the coaxiality error of the rising and falling, and ensuring that the V-shaped extruder 301 is accurately aligned with the center of the connecting end; the low frictional cooperation between the slide rail and the sliding part reduces the resistance to the rising and falling of the extruder, reduces the driving force loss of the linear drive 5, and makes the action response more agile; the slide rail part 101 provides lateral support for the extruder 3, disperses the radial stress during extrusion, avoids the extruder 3 from bending deformation due to force, and extends the service life of the extruder.

[0038] Furthermore, it also includes a lead screw 6, which is disposed through the lower side of the frame 1, and the lower support 2 is rotatably disposed on the upper end of the lead screw 6. The lead screw 6 is used to drive the lower support 2 to rise and fall.

[0039] In this embodiment, the lead screw 6 achieves the lifting and lowering of the lower support 2 through threaded transmission, improving adjustment accuracy. It can be finely adjusted according to the length of the connecting end. Compared with traditional manual or pneumatic lifting, the positioning error is reduced, ensuring precise alignment between the connecting end and the V-shaped part of the extrusion part 3. The lead screw thread has a natural self-locking characteristic, so the lower support 2 will not sink or shift due to the extrusion reaction force after adjustment, maintaining its position and reducing error. This avoids deformation deviation caused by the "displacement" of the connecting end during dynamic extrusion. The effective stroke of the lead screw is adapted to the length of the connecting end, and the adjustment process can be controlled in a closed loop through scale or motor, eliminating the need for repeated trial and error. The adjustment time for single specification switching is shortened to within 10 seconds.

[0040] It should be noted that the lower support 2 will be limited by an upper limit or additional guide column on the frame 1 to prevent rotation relative to the frame 1 and ensure accuracy.

[0041] Furthermore, the side support 4 is cylindrical, and the outer circumferential surface of the side support 4 is used to abut against the outer circumference of the connecting end.

[0042] In this embodiment, the cylindrical outer circumferential surface of the side support 4 forms an arc-shaped fit with the connecting end (mostly circular), resulting in a uniform contact area and high fit. Compared with non-cylindrical supports, the horizontal positioning error is reduced, and the lateral offset of the connecting end is decreased. The cylindrical structure and the connecting end undergo rolling friction, avoiding scratches on the surface of the connecting end caused by sliding friction, thus improving the appearance integrity rate of the connecting end. The cylindrical outer circumferential surface has no sharp edges and can automatically adapt to the outer circumferential contour of connecting ends with different diameters. Even if the connecting end has a slight ellipticity, it can still stably abut, improving compatibility.

[0043] Furthermore, the linear drive component 5 and the extrusion component 3 are connected by a pin.

[0044] In this embodiment, the pin connection between the linear drive 5 and the extruder 3 provides relative rotational freedom for the linear drive 5 and the extruder 3, which can automatically compensate for angular deviations caused by installation errors or minor deformations during dynamic extrusion, avoiding jamming or additional torque caused by rigid connections, and improving the smoothness of movement; the pin transmits driving force through surface contact, dispersing the point contact stress of traditional rigid connections, reducing the stress at the connection between the output end of the drive and the extruder 3, avoiding component cracking caused by long-term alternating stress, and extending the service life of the linear drive 5; it allows for coaxiality errors in the mounting axes of the drive and the extruder 3, ensuring normal operation without ultra-precision assembly, improving assembly efficiency, and reducing the difficulty of production and debugging.

[0045] Furthermore, the lower support member 2 has a V-shaped support portion 201.

[0046] In this embodiment, the lower support 2 guides the connecting end to be centered on the inclined surfaces on both sides of the V-shaped support 201, eliminating the need for manual centering and reducing horizontal positioning error. Compared with planar support, the positioning accuracy is improved, ensuring that the connecting end is always at the center of the extrusion axis. The V-shaped two-point contact structure forms a triangular stable support, which can effectively resist the radial force generated by the extrusion reaction force, preventing the connecting end from sinking or shifting. The support stability is improved compared with planar support. The V-shaped opening can automatically fit the connecting end, and it can provide stable support even if the connecting end has a slight taper. There is no need to replace the support components, and the compatibility is improved compared with planar support.

[0047] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A shovel head retaining ring mounting device, characterized in that, include: Rack (1); The lower support member (2) is raised and lowered relative to the frame (1); The extrusion member (3) is raised and lowered on the lower support member (2). The lower support member (2) and the extrusion member (3) are located on the same straight line perpendicular to the horizontal direction. After the extrusion member (3) is lowered, it is used to extrude and deform the connecting end of the shovel head and the handle to reduce the diameter, and is used to install the retaining ring. The connecting end has a clearance gap. When the clearance gap is at its minimum, the retaining ring is engaged on the connecting end.

2. The shovel head retaining ring installation device according to claim 1, characterized in that, Also includes: Side support member (4), there are two side support members (4), which are rotatably mounted on the frame (1) and symmetrically arranged along the line where the lower support member (2) and the extruder (3) are located, to limit the horizontal position of the shovel head when the extruder (3) descends.

3. The shovel head retaining ring installation device according to claim 1, characterized in that, The extrusion member (3) has a V-shaped extrusion section (301) for extruding the connecting end.

4. The shovel head retaining ring installation device according to claim 3, characterized in that, The V-shaped extrusion part (301) has a first pressing part (302) and a second pressing part (303). The thickness of the first pressing part (302) is greater than the thickness of the second pressing part (303). After the V-shaped extrusion part (301) is pressed down, the first pressing part (302) first contacts the connecting end on one side of the relief seam, so that the structures on both sides of the relief seam cross and overlap.

5. The shovel head retaining ring installation device according to claim 1, characterized in that, Also includes: A linear drive (5) is connected to the extruder (3) at its output end, and is used to drive the extruder (3) to rise and fall.

6. The shovel head retaining ring installation device according to claim 1, characterized in that, The extruder (3) has sliding parts (304) at both ends, and the frame (1) also has a slide rail (101). The sliding parts (304) are slidably disposed on the slide rail (101).

7. The shovel head retaining ring installation device according to claim 1, characterized in that, Also includes: A lead screw (6) is provided through the lower side of the frame (1), and a lower support member (2) is rotatably provided on the upper end of the lead screw (6). The lead screw (6) is used to drive the lower support member (2) to rise and fall.

8. A shovel head retaining ring installation device according to claim 2, characterized in that, The side support (4) is cylindrical, and the outer circumferential surface of the side support (4) is used to abut against the outer circumference of the connecting end.

9. A shovel head retaining ring mounting device according to claim 5, characterized in that, The linear drive (5) and the extrusion member (3) are connected by a pin.

10. A shovel head retaining ring mounting device according to claim 1, characterized in that, The lower support member (2) has a V-shaped support portion (201).

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