A safety protection device for a high-branch saw used for tree pruning
By designing guide rods and spring mechanisms for the left and right protective shells, the safety hazards of the high-branch saw were solved, enabling automatic closing and manual opening of the saw body, thus improving safety and convenience.
Patent Information
- Application Number
- CN202522561264.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-02
- Publication Date
- 2026-11-06
- Estimated Expiration
- 2035-12-02
AI Technical Summary
Existing high-branch saws lack effective safety protection structures. The saw body is easily activated accidentally when not in operation, posing a safety hazard. Furthermore, the simple protective cover cannot prevent damage to the saw body.
Design a safety protection device that includes a left protective shell and a right protective shell. The saw body is automatically closed and manually opened through a guide rod and spring mechanism, ensuring that the saw body is completely covered when not in use and can be easily and quickly opened when in use.
Effective isolation of the saw body prevents accidental activation and safety accidents, improving the safety of using the high branch saw and enhancing its ease of operation.
Smart Images
Figure CN224936203U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of protective device technology, and in particular to a safety protective device for a high-branch saw used for pruning trees. Background Technology
[0002] The high-branch saw, a common tree pruning tool, is widely used in landscaping, forestry management, and other operations. It typically consists of a support rod, a saw body at one end of the support rod, and a drive module at the other end. The operator activates the drive module by holding the handle on the support rod, which then drives the saw body to cut branches at higher elevations.
[0003] However, existing high-pole saws generally have certain safety hazards in their structural design. Since the saw blade is usually directly exposed without an effective protective structure, if the starting device is accidentally activated or improper operation is performed when not in use, the saw blade may start unexpectedly, which can easily cause personal injury or equipment damage. In addition, during the storage, handling, or repositioning of the equipment, the exposed saw blade can easily cause scratches or damage to operators or the surrounding environment, posing a significant safety risk.
[0004] Currently, some high-branch saws on the market achieve safety protection by using simple protective covers. However, these simple covers are not effective; if the saw is accidentally activated, it may cut and damage the cover. Therefore, this paper provides a safety protection device for high-branch saws used for tree pruning to solve the above-mentioned technical problems. Utility Model Content
[0005] The purpose of this utility model is to provide a safety protection device for a high-branch saw used for tree pruning, in order to address the shortcomings of existing technologies and solve the technical problem that existing high-branch saws used for tree pruning do not have safety protection functions.
[0006] To achieve the above objectives, the technical solution of this utility model is as follows: A safety protection device for a high-branch saw used for tree pruning includes a support rod, one end of which is equipped with a saw body similar to that used for tree pruning, and the other end of which is equipped with a drive module for driving the saw body. Its features are: It also includes a left protective shell and a right protective shell for covering the saw body. The left protective shell is equipped with a left connecting part, and the right protective shell is equipped with a right connecting part. A first sliding sleeve is slidably provided on the support rod. The first sliding sleeve is equipped with a left fixed frame and a right fixed frame. A guide rod with a length direction perpendicular to the length direction of the support rod is fixed inside the left fixed frame and the right fixed frame. A left sliding member is installed on the left connecting part and is slidably connected to the guide rod in the left fixed frame. A right sliding member is installed on the right connecting part and is slidably connected to the guide rod in the right fixed frame.
[0007] Furthermore, the left and right protective shells are arranged symmetrically, and the guide rods are arranged laterally.
[0008] Furthermore, springs are wound around the guide rods in both the left and right fixed frames. The spring in the left fixed frame applies a force to the left sliding member toward the support rod, and the spring in the right fixed frame applies a force to the right sliding member toward the support rod.
[0009] Furthermore, a second sliding sleeve is slidably provided on the support rod, spaced apart from the first sliding sleeve. The second sliding sleeve is located on the side of the first sliding sleeve away from the saw body. The second sliding sleeve is provided with a left pushing component and a right pushing component arranged symmetrically on the left and right sides. The left pushing component is used to push the left sliding member to slide away from the support rod, and the right pushing component is used to push the right sliding member to slide away from the support rod.
[0010] Furthermore, both the inner walls of the first and second sliding sleeves are provided with limiting protrusions, and the surface of the support rod is formed with a limiting groove extending linearly along its length direction. The limiting protrusion is slidably disposed in the limiting groove along the length direction of the support rod.
[0011] Furthermore, the left push assembly includes a support frame fixedly mounted on the second sliding sleeve. Inside the support frame, a vertically arranged pivot is rotatably mounted. A lever is fixedly mounted on the pivot. One end of the lever is placed inside the support frame, and the other end of the lever extends to the side of the left fixed frame. A push rod is formed at the end of the lever near the side of the left fixed frame, which is positioned above the left fixed frame. The push rod is formed with a first sliding groove. The top of the left fixed frame is formed with a clearance groove whose length direction is parallel to the sliding direction of the left sliding member. The left sliding member is equipped with a vertically arranged first sliding rod, the top end of which passes through the clearance groove and is placed in the first sliding groove.
[0012] Furthermore, a second groove is formed at one end of the lever inside the support frame, and a push frame is slidably provided on the side of the support frame away from the second sliding sleeve. The push frame can slide laterally in the direction of approaching or moving away from the second sliding sleeve. The push frame is equipped with a second sliding rod that is placed in the second groove and arranged vertically.
[0013] Furthermore, a horizontally arranged limiting rod is installed inside the frame, and the limiting rod is slidably connected to the supporting frame.
[0014] Furthermore, the side of the frame away from the second sliding sleeve is molded with anti-slip texture.
[0015] Furthermore, the left and right protective shells are both formed with semi-circular grooves on the side away from the first sliding sleeve. The semi-circular grooves on the left and right protective shells are arranged symmetrically. The inner sidewalls of the semi-circular grooves on both sides are formed with semi-circular arc-shaped inserts. The end of the support rod with the saw body is formed with a groove for inserts to be inserted. The groove is circular.
[0016] The beneficial effects of this invention are as follows: When the paving saw is not in use, the left and right protective shells are in a closed state, completely enclosing the saw body inside them, and the shells remain in a non-contact state with the saw body. This structure not only effectively isolates the saw body, preventing damage to the protective shells caused by accidental activation of the saw body due to accidental activation of the drive module, but also fundamentally eliminates the safety hazards caused by the exposed saw body, significantly improving the safety of using the paving saw.
[0017] When using a high-branch saw, apply a force that moves the left and right sliding parts away from each other, causing them to slide on different guide rods in opposite directions. This moves the left and right protective shells away from each other, opening them up. Then, pull the first sliding sleeve on the support rod to slide away from the saw body, moving the open left and right protective shells along the length of the support rod, exposing the saw body for easier tree pruning and improving the convenience of use for workers. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in this utility model or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.
[0019] Figure 1 This is a three-dimensional structural diagram of a safety protection device for a high-branch saw used for pruning trees, according to the present invention.
[0020] Figure 2 This is a three-dimensional structural diagram of the safety protection device in this utility model.
[0021] Figure 3 This is a diagram showing the state of the left and right push components after they have been in operation in this utility model.
[0022] Figure 4 This is another state diagram of a safety protection device for a high-branch saw used for pruning trees according to this utility model.
[0023] Figure 5 This is a schematic diagram of the left-pushing component in this utility model.
[0024] Figure 6 This is a schematic diagram of the structure of the left and right protective shells in this utility model.
[0025] The reference numerals in the figures include: 1. Support rod; 2. Saw body; 3. Drive module; 4. Handle; 5. Left protective shell; 6. Right protective shell; 7. First sliding sleeve; 8. Left fixed frame; 81. Clearance groove; 9. Right fixed frame; 10. Left connecting part; 11. Right connecting part; 12. Guide rod; 13. Left sliding component; 14. Right sliding component; 15. Spring; 16. Second sliding sleeve; 17. Left push assembly; 171. Support frame; 172. Rotating shaft; 173. Lever; 174. Push rod; 175. First slide groove; 176. First slide rod; 177. Second slide groove; 178. Push frame; 179. Second slide rod; 1710. Limiting rod; 1711. Anti-slip texture; 18. Right push assembly; 19. Limiting protrusion; 20. Limiting groove; 21. Semicircular groove; 22. Insert; 23. Insert groove. Detailed Implementation
[0026] The following is a detailed description of a safety protection device for a high-branch saw used for pruning trees, in conjunction with the accompanying drawings.
[0027] Existing high-branch saws include a support rod 1, with a saw body 2 (similar to those used for tree pruning) mounted at one end of the support rod 1, and a drive module 3 for driving the saw body 2 at the other end of the support rod 1. A handle 4 is also provided on the support rod 1. As this is existing technology, workers hold the high-branch saw via the handle 4 and activate the drive module 3 to drive the saw body 2, thus enabling tree pruning.
[0028] like Figure 1-4 As shown, an embodiment of the safety protection device for a high-branch saw used for pruning trees according to this utility model includes a left protective shell 5 and a right protective shell 6 arranged symmetrically to cover the saw body 2. The left protective shell 5 is equipped with a left connecting part 10, and the right protective shell 6 is equipped with a right connecting part 11. A first sliding sleeve 7 is slidably provided on the support rod 1. The first sliding sleeve 7 slides along the length of the support rod 1. A left fixed frame 8 and a right fixed frame 9 are respectively provided on the left and right sides of the first sliding sleeve 7. A horizontally arranged guide rod 12 is fixed inside the left fixed frame 8 and the right fixed frame 9. The length direction of the guide rod 12 is perpendicular to the length direction of the support rod 1. A left sliding member 13 is installed on the left connecting part 10. The left sliding member 13 is slidably connected to the guide rod 12 in the left fixed frame 8. A right sliding member 14 is installed on the right connecting part 11. The right sliding member 14 is slidably connected to the guide rod 12 in the right fixed frame 9.
[0029] When the peg saw is not in use, the left protective shell 5 and right protective shell 6 are closed, thus covering the saw body 2. The protective shells 5 and 6 provide safety protection for the saw body 2, preventing accidental activation of the drive module 3 and thus improving the safety of the peg saw. When the peg saw needs to be used, a force is applied to the left sliding member 13 and right sliding member 14 to move them laterally away from each other on different guide rods 12. This causes the left and right protective shells 5 and 6 to move away from each other, opening them up. Then, the first sliding sleeve 7 is pulled along the support rod 1 to slide away from the saw body 2, moving the open left and right protective shells 5 and 6 along the length of the support rod 1, exposing the saw body 2 for pruning. When the peg saw is not in use, the above steps are reversed.
[0030] In addition, springs 15 are wound around the guide rod 12 in both the left fixed frame 8 and the right fixed frame 9. The spring 15 in the left fixed frame 8 applies a force to the left sliding member 13 toward the support rod 1, and the spring 15 in the right fixed frame 9 applies a force to the right sliding member 14 toward the support rod 1. When no force is applied to the left sliding member 13 and the right sliding member 14 to move them away from each other, the springs 15 in the left fixed frame 8 and the right fixed frame 9 apply relative forces to the left sliding member 13 and the right sliding member 14, keeping the left protective shell 5 and the right protective shell 6 in a closed state and preventing them from separating automatically.
[0031] In order to control the movement of the left protective shell 5 and the right protective shell 6 in a direction away from each other, a second sliding sleeve 16 is slidably provided on the support rod 1 at a distance from the first sliding sleeve 7. The second sliding sleeve 16 is located on the side of the first sliding sleeve 7 away from the saw body 2. The second sliding sleeve 16 is equipped with a left pushing assembly 17 and a right pushing assembly 18 arranged symmetrically on the left and right sides. The left pushing assembly 17 is used to push the left sliding member 13 to slide away from the support rod 1, and the right pushing assembly 18 is used to push the right sliding member 14 to slide away from the support rod 1.
[0032] like Figure 3As shown, by applying relative forces to the left pushing assembly 17 and the right pushing assembly 18, the left sliding member 13 and the right sliding member 14 are simultaneously pushed to slide away from the support rod 1. The left protective shell 5 and the right protective shell 6 open, and the springs 15 in the left fixed frame 8 and the right fixed frame 9 are simultaneously compressed. While applying force to the left pushing assembly 17 and the right pushing assembly 18, the second sliding sleeve 16 is pulled to slide away from the saw body 2 on the support rod 1. This allows the first sliding sleeve 7, as well as the open left and right protective shells 5 and 6, to move simultaneously along the length of the support rod 1, exposing the saw body 2. When the relative forces applied to the left pushing assembly 17 and the right pushing assembly 18 are stopped, the left sliding member 13 and the right sliding member 14 are pushed to reset towards each other under the action of the compression spring 15, thereby causing the left and right protective shells 5 and 6 to close again, and also causing the left pushing assembly 17 and the right pushing assembly 18 to reset. By setting up a left push component 17 and a right push component 18, the operator can control the opening of the left protective shell 5 and the right protective shell 6 with only one hand, which improves the convenience of the operator.
[0033] Limiting protrusions 19 are provided on the inner sidewalls of the first sliding sleeve 7 and the second sliding sleeve 16. A limiting groove 20 extending linearly along the length direction is formed on the surface of the support rod 1. The limiting protrusions 19 are slidably disposed within the limiting groove 20 along the length direction of the support rod 1. By providing the limiting protrusions 19 and the limiting groove 20, the first sliding sleeve 7 and the second sliding sleeve 16 always slide in a straight line on the surface of the support rod 1, and neither of them will rotate or shift.
[0034] like Figure 5 As shown, the left pushing assembly 17 and the right pushing assembly 18 have the same structure and operate in the same way. The left pushing assembly 17 includes a support frame 171 fixedly mounted on the second sliding sleeve 16. Inside the support frame 171, a vertically arranged rotating shaft 172 is rotatably mounted. A lever 173 is fixedly mounted on the rotating shaft 172. One end of the lever 173 is placed inside the support frame 171, and the other end of the lever 173 extends to the side of the left fixed frame 8. By setting the rotating shaft 172, the lever 173 can rotate around the vertical axis in the support frame 171, and both ends of the lever 173 can swing around the vertical axis.
[0035] One end of lever 173 near the left fixed frame 8 is formed with a push rod 174 positioned above the left fixed frame 8. The push rod 174 is formed with a first sliding groove 175. The top of the left fixed frame 8 is formed with a clearance groove 81 whose length direction is parallel to the sliding direction of the left sliding member 13. The left sliding member 13 is equipped with a vertically arranged first sliding rod 176. The top end of the first sliding rod 176 passes through the clearance groove 81 and is placed in the first sliding groove 175. After applying a force towards the second sliding sleeve 16 to the end of lever 173 located inside the support frame 171, under the action of the lever principle, the end of lever 173 near the left fixed frame 8 will move away from the first sliding sleeve 7. The push rod 174 pushes the first sliding rod 176 and the left sliding member 13 together to slide away from the first sliding sleeve 7, thereby opening the left protective shell 5 and the right protective shell 6.
[0036] During the pushing process, the first groove 175 is used to buffer the stroke to prevent insufficient stroke and jamming during the swinging of the end of the lever 173.
[0037] In this embodiment, the end of lever 173 near the side of the left fixed frame 8 can also be formed with a pair of push rods 174 respectively positioned above and below the left fixed frame 8. Each of the push rods 174 has a first sliding groove 175. The top and bottom of the left fixed frame 8 both have clearance grooves 81 whose length direction is parallel to the sliding direction of the left sliding member 13. The left sliding member 13 is equipped with a vertically arranged first sliding rod 176. The top end of the first sliding rod 176 passes through the clearance groove 81 at the top of the left fixed frame 8 and is placed in the first sliding groove 175 of the upper push rod 174. The bottom end of the first sliding rod 176 passes through the clearance groove 81 at the bottom of the left fixed frame 8 and is placed in the first sliding groove 175 of the lower push rod 174. By setting a pair of push rods 174 arranged vertically, the first sliding rod 176 and the left sliding member 13 are more evenly and stably subjected to force.
[0038] In order to apply a force toward the second sliding sleeve 16 to one end of the lever 173 placed inside the support frame 171, a second sliding groove 177 is formed on one end of the lever 173 placed inside the support frame 171. A push frame 178 is slidably provided on the side of the support frame 171 away from the second sliding sleeve 16. The push frame 178 can slide laterally toward or away from the second sliding sleeve 16. A second sliding rod 179 is installed in the push frame 178 and is arranged vertically inside the second sliding groove 177.
[0039] After the operator applies a force to the push frame 178 toward the direction of the second sliding sleeve 16, the push frame 178 and the second sliding rod 179 move laterally toward the direction of the second sliding sleeve 16. The second sliding rod 179 can push the end of the lever 173 inside the support frame 171 to move toward the direction of the second sliding sleeve 16. The push rod 174 pushes the first sliding rod 176 and the left sliding member 13 to slide together away from the first sliding sleeve 7. The spring 15 is compressed. When the force applied to the push frame 178 is stopped, under the action of the compressed spring 15, the first sliding rod 176 and the left sliding member 13 are pushed to reset together toward the direction of the first sliding sleeve 7. The push rod 174 moves in the opposite direction to reset, and the lever 173 rotates in the opposite direction, so that the push frame 178 and the second sliding rod 179 move laterally away from the second sliding sleeve 16, achieving the effect of automatic reset.
[0040] A horizontally arranged limiting rod 1710 is installed inside the push frame 178, and the limiting rod 1710 is slidably connected to the support frame 171. The limiting rod 1710 is used to limit the sliding range of the push frame 178, so that the push frame 178 can move laterally within a specified range, that is, after moving laterally away from the second sliding sleeve 16 to reset to the specified position, it automatically stops.
[0041] Anti-slip texture 1711 is formed on the side of the push frame 178 away from the second sliding sleeve 16. With the help of the anti-slip texture 1711, the operator can avoid slipping when applying force to the push frame 178.
[0042] like Figure 6 As shown, both the left protective shell 5 and the right protective shell 6 have semi-circular grooves 21 formed on the side away from the first sliding sleeve 7. The semi-circular grooves 21 on the left protective shell 5 and the right protective shell 6 are arranged symmetrically. The inner walls of the semi-circular grooves 21 on both sides are formed with semi-circular arc-shaped inserts 22. The end of the support rod 1 where the saw body 2 is mounted has a groove 23 for the inserts 22 to be inserted (e.g., Figure 3 As shown), the groove 23 is circular.
[0043] When the limiting protrusion 19 on the inner sidewall of the second sliding sleeve 16 slides to the end of the limiting groove 20, the insert 22 aligns with the groove 23. After the force applied to the pushing frame 178 stops, the left protective shell 5 and the right protective shell 6 close together and the insert 22 is inserted into the groove 23. With the cooperation of the insert 22 and the groove 23, the left protective shell 5 and the right protective shell 6 are limited to prevent the position of the left protective shell 5 and the right protective shell 6 from changing during the use of the high-wire saw, so as to affect the user experience of the high-wire saw.
[0044] In summary, this utility model possesses the aforementioned excellent characteristics, enabling it to achieve unprecedented efficiency in use and thus become a highly practical product.
[0045] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of this utility model. The content of this specification should not be construed as a limitation of this utility model.
Claims
1. A safety protection device for a high-branch saw used for tree pruning, comprising a support rod (1), one end of which is equipped with a saw body (2) similar to that used for tree pruning, and the other end of which is equipped with a drive module (3) for driving the saw body (2) to operate, characterized in that: It also includes a left protective shell (5) and a right protective shell (6) for covering the saw body (2). The left protective shell (5) is equipped with a left connecting part (10), and the right protective shell (6) is equipped with a right connecting part (11). A first sliding sleeve (7) is slidably provided on the support rod (1). The first sliding sleeve (7) is equipped with a left fixed frame (8) and a right fixed frame (9). A guide rod (12) with a length direction perpendicular to the length direction of the support rod (1) is fixedly provided inside the left fixed frame (8) and the right fixed frame (9). A left sliding member (13) is installed on the left connecting part (10). The left sliding member (13) is slidably connected to the guide rod (12) in the left fixed frame (8). A right sliding member (14) is installed on the right connecting part (11). The right sliding member (14) is slidably connected to the guide rod (12) in the right fixed frame (9).
2. A safety guard for a high-lift pruner according to claim 1, characterized in that: The left protective shell (5) and the right protective shell (6) are arranged symmetrically on the left and right sides, and the guide rod (12) is arranged laterally.
3. A safety guard for a high-lift pruner according to claim 2, wherein: Springs (15) are wound around the guide rod (12) in the left fixed frame (8) and the guide rod (12) in the right fixed frame (9). The spring (15) in the left fixed frame (8) is used to apply a force to the left sliding member (13) in the direction of approaching the support rod (1), and the spring (15) in the right fixed frame (9) is used to apply a force to the right sliding member (14) in the direction of approaching the support rod (1).
4. A safety guard for a high-lift pruner according to claim 3, wherein: A second sliding sleeve (16) is slidably provided on the support rod (1) at a distance from the first sliding sleeve (7). The second sliding sleeve (16) is located on the side of the first sliding sleeve (7) away from the saw body (2). The second sliding sleeve (16) is equipped with a left push assembly (17) and a right push assembly (18) arranged symmetrically on the left and right sides. The left push assembly (17) is used to push the left sliding member (13) to slide away from the support rod (1), and the right push assembly (18) is used to push the right sliding member (14) to slide away from the support rod (1).
5. A safety guard for a high-lift pruner according to claim 4, wherein: The inner sidewall of the first sliding sleeve (7) and the inner sidewall of the second sliding sleeve (16) are both provided with limiting protrusions (19). The surface of the support rod (1) is formed with a limiting groove (20) extending in a straight line along its length direction. The limiting protrusions (19) are slidably disposed in the limiting groove (20) along the length direction of the support rod (1).
6. A safety guard for a high limb saw for pruning trees according to claim 4, characterized in that: The left push assembly (17) includes a support frame (171) fixedly mounted on the second sliding sleeve (16). Inside the support frame (171) is a vertically arranged pivot (172) rotatably mounted. A lever (173) is fixedly mounted on the pivot (172). One end of the lever (173) is placed inside the support frame (171), and the other end of the lever (173) extends to the side of the left fixed frame (8). The lever (173) is close to the left fixed frame (8). A push rod (174) is formed on one side and placed above the left fixed frame (8). The push rod (174) is formed with a first sliding groove (175). The top of the left fixed frame (8) is formed with a relief groove (81) whose length direction is parallel to the sliding direction of the left sliding member (13). The left sliding member (13) is equipped with a vertically arranged first sliding rod (176). The top of the first sliding rod (176) passes through the relief groove (81) and is placed in the first sliding groove (175).
7. A safety guard for a high-lift pruner according to claim 6, wherein: The lever (173) is placed inside the support frame (171) with a second groove (177) formed at one end. The support frame (171) is slidably provided with a push frame (178) on the side away from the second sliding sleeve (16). The push frame (178) can slide laterally in the direction of approaching or moving away from the second sliding sleeve (16). The push frame (178) is equipped with a second slide rod (179) placed in the second groove (177) and arranged vertically.
8. A safety guard for a high-lift pruner according to claim 7, wherein: A horizontally arranged limiting rod (1710) is installed inside the push frame (178), and the limiting rod (1710) is slidably connected to the support frame (171).
9. A safety guard for a high limb saw for pruning trees according to claim 7, characterized in that: The side of the push frame (178) away from the second slide sleeve (16) is formed with anti-slip texture (1711).
10. A safety protection device for a high-branch saw used for tree pruning according to claim 1, characterized in that: The left protective shell (5) and the right protective shell (6) are both formed with a semi-circular groove (21) on the side away from the first sliding sleeve (7). The semi-circular groove (21) on the left protective shell (5) and the semi-circular groove (21) on the right protective shell (6) are arranged symmetrically on the left and right sides. The inner sidewall of the semi-circular groove (21) on the left and right sides is formed with a semi-circular arc-shaped insert (22). The end of the support rod (1) equipped with the saw body (2) is formed with a groove (23) for the insert (22) to be inserted. The groove (23) is circular.