Safety device for a leather grinding machine

Abstract

The utility model discloses a safety device of leather grinding machine, including fender, mounting bracket and swing door, and fender both sides are fixed with mounting bracket respectively, and the upper symmetry of swing door both sides is provided with the swing axle, and swing door is through swing axle and is connected with the rotation of mounting bracket, and swing door is located fender bottom, and the rear wall fixed welding of mounting bracket has the support, and the arc slide groove is seted up in the support, and the sliding block is installed in the arc slide groove, and the inside of sliding block and located swing door rear fixed mounting limit rod, and limit rod is used for limiting the rotation angle of swing door. The utility model can through the linkage adjusting mechanism of sleeve, connecting rod, pivot seat and sliding block, realize the quick adjustment of limit rod position, and accurate adaptation different leather processing technology to the demand of swing door opening angle, and with the cooperation of the bolt and multiple groups of around pin hole, realize the reliable locking of swing door opening angle, avoid the limit failure due to vibration.

Description

Technical Field

[0001] This utility model relates to the field of leather processing equipment technology, and in particular to a safety device for a leather grinding machine. Background Technology

[0002] In the leather processing industry, the leather grinding machine is a key piece of equipment, and its safety performance is of paramount importance. Most existing leather grinding machine safety devices adopt a fixed limit structure, which limits the operator's contact with dangerous parts by setting a fixed protective cover and movable door around the operating area of ​​the leather grinding machine.

[0003] However, this type of fixed limiting structure has obvious defects: because different leather processing techniques have different requirements for the opening angle of the movable door when feeding and maintaining the leather grinding machine, the fixed limiting device cannot be flexibly adjusted. It either restricts the operating space and affects work efficiency, or the safety protection fails due to the excessive opening angle, making it difficult to balance safety and ease of operation.

[0004] While some improved safety devices attempt to incorporate adjustable limit components, they often employ single-point positioning or lack precise positioning designs. During use, these devices are prone to limit angle shifts due to factors such as vibration, failing to reliably lock the opening angle of the movable door. This poses a safety hazard of operators accidentally extending their limbs into dangerous areas, making it difficult to guarantee the stability of safety protection. Furthermore, conventional separate limit components lack a linkage design with the movable door, requiring operators to perform multiple steps when adjusting the limit position. This is not only time-consuming and laborious but also prone to incomplete adjustments, severely impacting the smoothness of production operations.

[0005] Therefore, how to design a leather grinding machine safety device that can flexibly adapt to the opening angle requirements of the movable door under different working conditions, accurately lock the angle, and ensure the reliability of safety protection and ease of operation has become a technical problem that urgently needs to be solved in this field. Utility Model Content

[0006] One objective of this invention is to provide a safety device for a leather grinding machine. This invention can achieve rapid adjustment of the position of the limit rod through a linkage adjustment mechanism of sleeve, connecting rod, rotating shaft seat and slider, accurately adapting to the opening angle requirements of different leather processing processes. Furthermore, with the cooperation of the pin and multiple sets of surrounding pin holes, the opening angle of the movable door can be reliably locked, avoiding limit failure due to vibration. This effectively solves the technical problem in the prior art where safety devices cannot balance safety and ease of operation.

[0007] A safety device for a leather grinding machine according to an embodiment of the present invention includes a protective cover, a mounting frame, and a movable door. The mounting frame is fixedly welded to both sides of the protective cover. Movable shafts are symmetrically arranged above both sides of the movable door. The movable door is rotatably connected to the mounting frame through the movable shafts, and the movable door is located at the bottom of the protective cover. A support is fixedly welded to the rear wall of the mounting frame. An arc-shaped groove is formed in the support. A slider is slidably installed in the arc-shaped groove. A limit rod is fixedly installed inside the slider and behind the movable door. The limit rod is used to limit the rotation angle of the movable door.

[0008] Furthermore, a through hole is provided in the mounting bracket, and a sleeve is fitted inside the through hole and on the movable shaft. A connecting rod is fixedly installed at the bottom end of the sleeve, and a rotating shaft seat is fixedly installed at the bottom of the connecting rod. The rotating shaft seat is movably connected to the slider through the rotating shaft, so that when the sleeve rotates, it can drive the slider to slide in the arc-shaped groove.

[0009] Furthermore, a handle is installed on the other side of the sleeve, symmetrical to the connecting rod. A rubber anti-slip sleeve is fitted on the handle, and the outer surface of the rubber anti-slip sleeve is provided with anti-slip texture to increase the friction between the operator's hand and the handle.

[0010] Furthermore, the outer wall of the mounting bracket is provided with a through-hole, and the outer wall of the sleeve is provided with a number of sets of pin holes around the axis of the movable shaft. The sets of pin holes are evenly distributed along the circumference of the sleeve. A pin is inserted into the through-hole, and the end of the pin is inserted into the pin hole to lock the position of the sleeve.

[0011] Furthermore, both sets of mounting brackets have an integrally formed mounting base at the bottom. The mounting base has a plate-like structure and a through hole for fixing the safety device to the leather grinding machine. The mounting hole is a circular through hole.

[0012] Furthermore, the movable door has a rotation angle range of - degrees within the mounting frame via the movable shaft, and the length of the limiting rod is adapted to the rotation angle of the movable door.

[0013] Furthermore, the sleeve has a clearance fit with the movable shaft inside the perforation, and the clearance size ranges from 0.1 to 0.3 mm, which ensures that the sleeve rotates while preventing wobbling.

[0014] Furthermore, the curvature of the arc-shaped groove in the support matches the movement trajectory of the limit rod when the movable door rotates, and the two ends of the arc-shaped groove are provided with limit protrusions to prevent the slider from sliding out.

[0015] Furthermore, the pin includes a head and a rod, and the diameter of the rod is adapted to the inner diameter of the insertion hole and the pin hole.

[0016] Furthermore, the rotation angle range of the rotating shaft seat and the slider being movably connected by the rotating shaft is 0-45 degrees, and this rotation angle is related to the sliding stroke of the slider in the arc-shaped groove caused by the rotation of the sleeve.

[0017] The beneficial effects of this utility model are:

[0018] 1. In this utility model, the linkage structure of sleeve, connecting rod, rotating shaft seat and slider enables the position of limit rod to be adjusted synchronously by rotating the handle. Compared with the traditional fixed limit structure, it can quickly adapt to the opening angle requirements of the movable door under different working conditions and solve the problem that the traditional limit device is difficult to adjust flexibly.

[0019] 2. The pin hole positioning structure between the sleeve and the mounting bracket in this utility model can accurately lock the opening angle of the movable door through the cooperation of the pin and multiple sets of surrounding pin holes. Compared with the design without positioning or single-point positioning, it significantly improves the reliability and stability of safety protection.

[0020] 3. The trajectory matching design of the movable door, the limiting rod and the arc-shaped slide groove in this utility model allows the limiting rod to move flexibly along the rotation trajectory of the movable door. While ensuring the convenience of operation, it avoids the risk of the movable door accidentally opening beyond its limit from the structural source. Compared with conventional separate limiting components, it achieves an innovative balance between safety protection and ease of operation. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0022] Figure 1 This is a schematic diagram of the overall structure of a safety device for a leather grinding machine proposed in this utility model;

[0023] Figure 2 This is a rear view structural diagram of a safety device for a leather grinding machine proposed in this utility model;

[0024] Figure 3 This is a schematic diagram of the structure for removing the protective cover of a safety device for a leather grinding machine proposed in this utility model;

[0025] Figure 4 This is a schematic diagram of the connection structure between the movable door and the sleeve of a safety device for a leather grinding machine proposed in this utility model;

[0026] Figure 5 This is a partially enlarged structural diagram of a safety device for a leather grinding machine proposed in this utility model;

[0027] Figure 6This is a partial enlarged structural diagram of the safety device for a leather grinding machine proposed in this utility model.

[0028] In the diagram: 1. Protective cover; 2. Mounting bracket; 3. Movable door; 4. Support; 5. Handle; 6. Mounting seat; 7. Arc-shaped slide; 8. Slider; 9. Limiting rod; 10. Sleeve; 11. Connecting rod; 12. Rotary shaft seat; 13. Pin; 14. Insertion hole; 15. Movable shaft; 16. Pin hole; 17. Through hole. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0030] To make the technical means and objectives and effects of this utility model easier to understand, the embodiments of this utility model will be described in detail below with reference to specific figures.

[0031] It should be noted that all directional and positional terms used in this utility model, such as "up," "down," "left," and "right," are only used to explain the relative positional relationships and connection arrangements between components in a specific state (as shown in the accompanying drawings). They are merely for the convenience of describing this utility model and do not require that this utility model be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. Furthermore, descriptions involving "first," "second," etc., in this utility model are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0032] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of 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.

[0033] In the description of this specification, references to terms such as "one embodiment," "some embodiments," etc., indicate that a specific feature or structure described in connection with that embodiment is included in at least one embodiment of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment. Furthermore, the specific features and structures described may be combined in any suitable manner in one or more embodiments.

[0034] like Figure 1-6As shown, this utility model discloses a safety device for a leather grinding machine, including a protective cover 1, a mounting frame 2, and a movable door 3. The protective cover 1 has a semi-circular arc-shaped cover structure, and the vertically arranged mounting frame 2 is fixedly connected to both sides by welding. The movable door 3 has a rectangular flat plate structure, and movable shafts 15 are symmetrically welded to the upper sides. The movable shafts 15 pass through through holes 17 opened on the inner side of the mounting frame 2, so that the movable door 3 is rotatably connected to the mounting frame 2 through the movable shafts 15. The movable door 3 is located at the bottom of the protective cover 1 and can be rotated upward around the movable shafts 15 to open.

[0035] A support 4 is welded to the middle of the rear wall of the mounting bracket 2. The support 4 is a U-shaped plate structure with an arc-shaped groove 7 centered on the movable shaft 15 inside. A rectangular slider 8 is slidably installed in the arc-shaped groove 7. A limit rod 9 is fixedly connected to the inner side of the slider 8 by bolts. The limit rod 9 is set horizontally and located behind the movable door 3 to limit the maximum rotation angle of the movable door 3.

[0036] The diameter of the through hole 17 in the mounting bracket 2 is larger than the outer diameter of the movable shaft 15, forming a clearance fit. A sleeve 10 is fitted inside the through hole 17. The sleeve 10 is coaxially arranged with the movable shaft 15. A connecting rod 11 is fixed to the bottom end by welding. A rotating shaft seat 12 is welded to the bottom of the connecting rod 11. The rotating shaft seat 12 is movably connected to the top of the slider 8 through a rotating shaft, forming a rotatable connection node. When the sleeve 10 rotates, the connecting rod 11 can drive the slider 8 to slide in the arc-shaped groove 7, thereby adjusting the position of the limit rod 9.

[0037] A handle 5 is welded to the other side of the sleeve 10 at a position symmetrical to the connecting rod 11. The handle 5 is a round rod structure with a rubber anti-slip sleeve on the outside. The outer surface of the anti-slip sleeve has annular raised anti-slip texture to increase the friction between the operator's hand and the handle 5, making it easier to rotate the sleeve 10.

[0038] The outer wall of the mounting bracket 2 has a through hole 14 corresponding to the position of the sleeve 10. The outer wall of the sleeve 10 has 6 sets of pin holes 16 evenly distributed along the circumference with the axis of the movable shaft 15 as the center. The angular interval between adjacent pin holes 16 is 60 degrees. A pin 13 is inserted into the through hole 14. The end of the pin 13 can be inserted into any set of pin holes 16 to achieve the positioning and locking of the rotation angle of the sleeve 10 and prevent the sleeve 10 from rotating on its own during use.

[0039] Both sets of mounting brackets 2 have a rectangular mounting base 6 integrally formed at the bottom. The mounting base 6 has 4 circular mounting holes with a diameter of 12mm, which are used to fix the safety device on the frame of the leather grinding machine with bolts to ensure a stable installation.

[0040] In actual use, the protective cover 1 protects the dangerous area of ​​the leather grinding machine. The movable door 3 can rotate and open around the movable shaft 15, facilitating loading and unloading operations. By turning the handle 5, the sleeve 10 rotates. The sleeve 10, through the connecting rod 11 and the rotating shaft seat 12, drives the slider 8 to slide within the arc-shaped groove 7, thereby adjusting the position of the limit rod 9 and limiting the rotation angle of the movable door 3. After adjusting to the appropriate position, the pin 13 is inserted to lock the sleeve 10, ensuring that the movable door 3 will not open accidentally during operation. The mounting base 6 is fixed to the leather grinding machine through the mounting holes, ensuring the stability of the entire safety device.

[0041] As an example of this application, the movable door 3 has a rotation angle range of 0-80 degrees inside the mounting bracket 2 via the movable shaft 15. When the movable door 3 rotates upward to 80 degrees, the back of the movable door 3 contacts the limiting rod 9 and is blocked by the limiting rod 9, so it cannot continue to rotate. The length of the limiting rod 9 is designed according to the rotation angle of the movable door 3 to ensure that it plays an effective limiting role at the maximum opening angle.

[0042] As an example of this application, the clearance between the sleeve 10 and the movable shaft 15 in the through hole 17 is 0.2 mm, which is a precision clearance fit. This ensures that the sleeve 10 can rotate flexibly around the movable shaft 15, and also prevents the sleeve 10 from shaking during rotation, which would affect the position adjustment accuracy of the limit rod 9.

[0043] As an example of this application, the curvature of the arc-shaped groove 7 in the support 4 is perfectly matched with the movement trajectory of the limit rod 9 when the movable door 3 rotates. Limiting protrusions are provided on the inner sides of both ends of the arc-shaped groove 7, with a protrusion height of 5mm, to prevent the slider 8 from sliding out of the arc-shaped groove 7 and to ensure that the slider 8 slides stably in the groove.

[0044] As an example of this application, the pin 13 includes a circular head and a cylindrical rod with a diameter of 8 mm, which is adapted to the inner diameter of the socket 14 and the pin hole 16. The head has a diameter of 15 mm, which is used to facilitate the operator to insert and remove the pin 13, while preventing the pin 13 from completely disengaging from the socket 14.

[0045] As an example of this application, the rotation angle range of the pivot seat 12 and the slider 8 connected by the pivot is 0-45 degrees. This rotation angle is related to the sliding stroke of the slider 8 in the arc-shaped groove 7 when the sleeve 10 rotates, ensuring that the rotation between the pivot seat 12 and the slider 8 is flexible and there is no motion interference during the rotation of the sleeve 10.

[0046] Working principle: When the movable door 3 needs to be opened for loading or maintenance, first pull out the pin 13 to release the locking state of the sleeve 10. Then, hold the handle 5 and rotate the sleeve 10. The sleeve 10 drives the slider 8 to slide in the arc-shaped groove 7 through the connecting rod 11 and the rotating shaft seat 12. Adjust the limit rod 9 to a suitable position, such as completely avoiding the rotation path of the movable door 3. At this time, the movable door 3 can be rotated upward. The movable door 3 rotates around the movable shaft 15 to open. When it is opened to the required angle, stop rotating the movable door 3 and rotate the sleeve 10 in the opposite direction to move the limit rod 9 to the rear of the movable door 3. Insert the pin 13 to lock the sleeve 10. The limit rod 9 can limit the rotation angle of the movable door 3 and prevent it from being over-opened. When closing the movable door 3, rotate the movable door 3 downward until it is in contact with the bottom of the protective cover 1 to complete the closing operation. By adjusting the position of the limit rod 9, the opening angle requirements of the movable door 3 of different leather grinding machines can be adapted, improving the versatility and flexibility of the safety device.

[0047] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

[0048] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A safety device for a leather grinding machine, characterized in that, The device includes a protective cover (1), a mounting frame (2), and a movable door (3). The mounting frame (2) is fixedly welded to both sides of the protective cover (1). Movable shafts (15) are symmetrically arranged above both sides of the movable door (3). The movable door (3) is rotatably connected to the mounting frame (2) through the movable shafts (15). The movable door (3) is located at the bottom of the protective cover (1). A support (4) is fixedly welded to the rear wall of the mounting frame (2). An arc-shaped groove (7) is opened in the support (4). A slider (8) is slidably installed in the arc-shaped groove (7). A limit rod (9) is fixedly installed inside the slider (8) and behind the movable door (3). The limit rod (9) is used to limit the rotation angle of the movable door (3).

2. The safety device for a leather grinding machine according to claim 1, characterized in that, The mounting bracket (2) has a through hole (17) inside. A sleeve (10) is fitted inside the through hole (17) and on the movable shaft (15). A connecting rod (11) is fixedly installed at the bottom of the sleeve (10). A rotating shaft seat (12) is fixedly installed at the bottom of the connecting rod (11). The rotating shaft seat (12) is movably connected to the slider (8) through a rotating shaft, so that when the sleeve (10) rotates, it can drive the slider (8) to slide in the arc-shaped groove (7).

3. The safety device for a leather grinding machine according to claim 2, characterized in that, A handle (5) is installed on the other side of the sleeve (10) and at a position symmetrical to the connecting rod (11). A rubber anti-slip sleeve is fitted on the handle (5), and the outer surface of the rubber anti-slip sleeve is provided with anti-slip texture to increase the friction between the operator's hand and the handle (5).

4. The safety device for a leather grinding machine according to claim 2, characterized in that, The mounting bracket (2) has a through-hole (14) on its outer wall. The sleeve (10) has a number of pin holes (16) around the axis of the movable shaft (15) on its outer wall. The pin holes (16) are evenly distributed along the circumference of the sleeve (10). A pin (13) is inserted into the through-hole (14), and the end of the pin (13) is inserted into the pin hole (16) to lock the position of the sleeve (10).

5. The safety device for a leather grinding machine according to claim 1, characterized in that, Both sets of mounting brackets (2) have an integrally formed mounting base (6) at the bottom. The mounting base (6) has a plate-like structure and a through hole for fixing the safety device on the leather grinding machine. The mounting hole is a circular through hole.

6. The safety device for a leather grinding machine according to claim 1, characterized in that, The movable door (3) has a rotation angle range of 0-80 degrees inside the mounting frame (2) via the movable shaft (15), and the length of the limiting rod (9) is adapted to the rotation angle of the movable door (3).

7. A safety device for a leather grinding machine according to claim 2, characterized in that, The sleeve (10) is in clearance fit with the movable shaft (15) in the through hole (17), and the clearance size ranges from 0.1 to 0.3 mm, which ensures that the sleeve (10) rotates while preventing shaking.

8. A safety device for a leather grinding machine according to claim 1, characterized in that, The arc of the arc-shaped groove (7) in the support (4) matches the movement trajectory of the limit rod (9) when the movable door (3) rotates. The arc-shaped groove (7) has limit protrusions at both ends to prevent the slider (8) from sliding out.

9. A safety device for a leather grinding machine according to claim 4, characterized in that, The pin (13) includes a head and a rod, and the diameter of the rod is adapted to the inner diameter of the insertion hole (14) and the pin hole (16).

10. A safety device for a leather grinding machine according to claim 2, characterized in that, The rotation angle range of the rotating shaft seat (12) and the slider (8) is 0-45 degrees, and the rotation angle is related to the sliding stroke of the slider (8) in the arc-shaped groove (7) driven by the rotation of the sleeve (10).

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