Locking mechanism and high pruner
By designing a closed structure with limiting and locking components in the locking mechanism of the high-pole shears, the problem of abnormal operation caused by foreign matter adhesion in the self-locking structure is solved, thus improving the reliability and stability of the high-pole shears.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG SUNSEEKER IND CO LTD
- Filing Date
- 2025-04-25
- Publication Date
- 2026-07-10
AI Technical Summary
The existing high-branch pruning shears' self-locking structure has a problem where foreign objects easily adhere to the exposed control unit, causing it to malfunction.
Design a locking mechanism including a handle housing, a limiting member, a locking member, and a moving member. The inner end faces of the limiting member and the handle housing are sealed inside to prevent foreign objects from adhering. The self-locking or unlocking function is achieved through the cooperation of the limiting member and the moving member.
This improves the reliability of high-pole shears, avoids unexpected malfunctions caused by foreign object adhesion, and ensures the stability and reliability of high-pole shears during use.
Smart Images
Figure CN224473751U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of garden tool technology, specifically to a locking mechanism and high-branch shears. Background Technology
[0002] High-branch shears are a type of gardening tool specifically designed for pruning branches at higher elevations. They typically consist of shear heads, a high-branch tube, and a power unit, helping users easily prune hard-to-reach branches and avoid the risks associated with climbing ladders.
[0003] The long-limb pruning shears are relatively long, and for easy storage, they can be folded. To ensure they are securely locked when folded, a self-locking mechanism is incorporated. In existing technologies, the self-locking mechanism of high-limb pruning shears typically consists of a control unit on the limb tube. This control unit comprises several sequentially connected fan-shaped control sections of varying thicknesses. By rotating the control unit, the operator engages one end of a moving component within the self-locking assembly with each of the different thicknesses, causing the moving component to extend or retract, engaging or disengaging from the teeth of a large gear, thus achieving the self-locking or unlocking function.
[0004] However, since the control unit is exposed to the external environment, foreign objects are easily adhered to its outer surface, and even a layer may form. During the process of rotating the control unit to control the self-locking component, the thinner fan-shaped control unit may experience a phenomenon where the pushing moving part gets stuck in the teeth of the large gear due to foreign objects adhering to its outer surface, causing the high-branch shears to be unable to cut normally. Utility Model Content
[0005] The purpose of at least one specific embodiment of this utility model is to overcome the defects of the prior art and provide a locking mechanism and high-branch shears.
[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0007] A locking mechanism includes a handle housing and a gear for driving the reciprocating movement of a shearing blade, and further includes:
[0008] A limiting component fixedly installed on the end face of the inner part of the handle housing;
[0009] A locking element that is slidably mounted on one side of the tooth groove of the gear;
[0010] The two opposite ends of the moving part abut against the limiting part and the locking part respectively. The limiting part can control the moving part to move closer to or away from the gear.
[0011] When the moving part moves, it can trigger the locking part to engage or disengage from the tooth groove of the gear.
[0012] Furthermore, a portion of the outer peripheral surface of the handle housing is configured as a positioning part, and multiple positioning holes are spaced apart along the circumferential direction on the positioning part. The handle housing is provided with a pin shaft for insertion into the positioning holes for positioning.
[0013] Furthermore, the limiting component is located on the inner end face of the positioning part.
[0014] Furthermore, the arc angle formed by the limiting member is greater than or equal to the arc angle formed by the positioning part.
[0015] Furthermore, the inner end face of the positioning part is provided with multiple limiting grooves along the circumferential direction, and the limiting component is clamped and installed in the multiple limiting grooves along the circumferential direction.
[0016] Furthermore, limiting holes are provided in the limiting grooves located at the outermost two ends. The opposite ends of the limiting member are respectively fixed in a pair of limiting holes, one of which is connected to the outside of the handle housing.
[0017] Furthermore, the limiting component is made of steel wire.
[0018] Furthermore, the moving part has an abutting part and a guiding part arranged opposite to each other. The abutting part abuts tightly with the limiting part. The locking part has a receiving groove with an opening size that gradually decreases from the outside to the inside. The guiding part has a shape structure that matches the receiving groove. The guiding part slides and extends in the receiving groove.
[0019] Furthermore, the outer peripheral surface of the locking member has longitudinally arranged guide ribs along the circumferential direction, and the cavity for installing the locking member has a guide groove, in which the guide ribs are vertically slidably installed.
[0020] Furthermore, the handle housing has a slot, into which a pin can be inserted to prevent the handle housing from rotating freely when it is in the stored state.
[0021] The advantages of the motor mounting structure provided in this application compared to the prior art are as follows: By adopting the above-mentioned locking mechanism, a limiting component is installed on the inner end face of the handle housing. In this way, during the rotation of the handle housing, the component in contact with the moving part is either the limiting component or the inner end face of the handle housing (the inner end face portion of the handle housing located outside the limiting component). Since the limiting component and the inner end face of the handle housing are inside the handle housing, they are in a relatively enclosed internal environment. This effectively avoids the phenomenon that the high-pole shears may fail to work normally due to foreign objects adhering to them in the external environment during the extension and retraction of the moving part, thus improving reliability.
[0022] Another technical solution adopted in this application is to provide a high-branch pruner, including the above-mentioned locking mechanism.
[0023] As can be seen from the above technical solution, the high-pole shears provided in this application, due to the configuration of the above-mentioned locking mechanism, have the corresponding technical effects of the locking mechanism. During use, since the limiting member and the inner end face of the handle housing are inside the handle housing, they are in a relatively closed internal environment. In this way, during the process of pushing the moving member to extend and retract, the phenomenon that the high-pole shears may not be able to work normally due to foreign objects adhering to them in the external environment can be effectively avoided, thus improving reliability. Attached Figure Description
[0024] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0025] Figure 1 This is a three-dimensional structural diagram of the locking mechanism in operation in one embodiment of this application.
[0026] Figure 2 This is a top view of the structure of the locking mechanism in operation in one embodiment of this application.
[0027] Figure 3 for Figure 2 A schematic diagram of the AA-direction cross-section structure.
[0028] Figure 4 This is a schematic diagram of the structural state of the moving part and the locking part cooperating when the locking mechanism is in working state in a certain embodiment of this application.
[0029] Figure 5 This is a schematic diagram of the structural state of the moving part and the limiting part cooperating when the locking mechanism is in working state in a certain embodiment of this application.
[0030] Figure 6 This is a three-dimensional structural diagram of the locking mechanism in a folded state according to a certain embodiment of this application.
[0031] Figure 7 This is a schematic diagram of the structural state of the moving part and the locking part cooperating when the locking mechanism is in a folded state in one embodiment of this application.
[0032] Figure 8 This is a schematic diagram of the structural state in which the moving part and the inner end face of the handle housing cooperate when the locking mechanism is in a folded state according to a certain embodiment of this application.
[0033] Figure 9This is a top view of the structure of the locking mechanism in a folded state according to one embodiment of this application.
[0034] Figure 10 for Figure 9 A schematic diagram of the HH-direction cross-sectional structure.
[0035] Figure 11 This is a three-dimensional structural diagram of the locking element in one embodiment of this application.
[0036] Figure 12 This is a schematic diagram of the structure of the movable component in one embodiment of this application.
[0037] Figure 13 This is a schematic diagram of the structure of the limiting member installed on the inner end face of the handle housing in one embodiment of this application.
[0038] Figure 14 This is a schematic diagram of the internal end face of the handle housing in one embodiment of this application.
[0039] Figure 15 for Figure 4 A magnified schematic diagram of the structure at point B in the diagram.
[0040] Figure 16 for Figure 5 A magnified schematic diagram of the structure at point C.
[0041] Figure 17 for Figure 6 A magnified schematic diagram of the structure at point D in the diagram.
[0042] Figure 18 for Figure 7 A magnified schematic diagram of the structure at point E in the diagram.
[0043] Figure 19 for Figure 8 A magnified schematic diagram of the structure at point F in the diagram.
[0044] Figure 20 This is a three-dimensional structural diagram of the locking mechanism provided in one embodiment of this application when the high-branch shears are in working condition.
[0045] Figure 21 This is a three-dimensional structural diagram of the locking mechanism provided in one embodiment of this application when the high-branch shears are in a folded state. Detailed Implementation
[0046] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Example 1
[0047] Reference Figure 1 To be continued Figure 10 As shown, a locking mechanism 10 includes a handle housing 100, a gear 400 for driving the shearing blade to reciprocate, a limiting member 300 fixedly installed on the end face of the inner part of the handle housing 100, a locking member 500 slidably disposed above the tooth groove of the gear 400, and a moving member 200 whose opposite ends respectively abut against the limiting member 300 and the locking member 500. The limiting member 300 can control the moving member 200 to move towards or away from the gear 400, and the moving member 200 can engage or disengage the locking member 500 from the tooth groove of the gear 400 when moving.
[0048] By employing the locking mechanism in this embodiment, a limiting member 300 is installed on the inner end face of the handle housing 100. Thus, during the rotation of the handle housing 100, the limiting member 300 or the moving member 200 is in free outward movement (the moving member 200 moves to the area of the handle housing 100 outside the limiting member 300) is in contact with the moving member 200. Since the limiting member 300 and the inner end face of the handle housing 100 are inside the handle housing 100, they are in a relatively enclosed internal environment. This effectively avoids the phenomenon that the high-pole shears may fail to work properly due to foreign objects adhering to them in the external environment during the extension and retraction of the moving member 200, resulting in higher reliability.
[0049] See attached document Figure 1 As shown, a plurality of positioning holes 101 are evenly provided on a portion of the outer peripheral surface of the handle housing 100. The pin shaft 103 provided on the handle housing 100 can be inserted into the positioning hole 101 for angular positioning after the handle housing 100 is rotated.
[0050] See attached document Figure 9 As shown, multiple positioning holes 101 are arranged in a ring along the rotation axis I of the outer casing handle to form a positioning part, which is arranged as part of the outer casing circumferential direction.
[0051] See attached document Figure 13As shown, the limiting member 300 is arranged in an arc shape on the inner end face of the positioning part. The arc angle formed by the limiting member 300 is greater than or equal to the arc angle formed by the positioning part. This allows the limiting member 300 to act on the moving member 200 when the handle housing 100 is rotated into the range of the positioning part, so that the high-branch shears can work normally.
[0052] See attached document Figure 7 Appendix Figure 13 and attached Figure 14 As shown, the inner end face of the positioning portion of the handle housing 100 is provided with a plurality of limiting grooves 102 along the circumferential direction, and the limiting member 300 is clamped and installed in the plurality of limiting grooves 102 along the circumferential direction. Furthermore, limiting holes 106 are also provided in the limiting grooves 102 located at the outermost two ends. The opposite ends of the limiting member 300 are respectively fixed in a pair of limiting holes 106, one of which communicates with the outside of the handle housing 100. That is, one end of the limiting member 300 is clamped to the outside of the handle housing 100 through the limiting hole 106, thus preventing the limiting member 300 from slipping out of the limiting hole 106 and enhancing the firmness of the limiting member 300 installed on the handle housing 100. In some embodiments, the limiting member 300 is a steel wire.
[0053] See attached document Figure 11 and attached Figure 12 As shown, the moving member 200 has an abutting part 201 and a guiding part 202 that are disposed opposite to each other. The abutting part 201 abuts tightly with the limiting member 300. The locking member 500 has a receiving groove 501 with an opening size that gradually decreases from the outside to the inside. The guiding part 202 has a shape structure that matches the receiving groove 501. The guiding part 202 can slide telescopically in the receiving groove 501.
[0054] See attached document Figure 11 As shown, the locking member 500 is also provided with vertically arranged guide ribs 502, which cooperate with the guide groove in the cavity where the locking member 500 is installed, and play a guiding role in the movement of the locking member 500. The number of guide ribs 502 can be flexibly set, and can be set to one or more.
[0055] See attached document Figure 6 and attached Figure 17 As shown, the handle housing is also provided with a slot 104. When the handle is rotated 180° to the attached position... Figure 6 When in the position shown (i.e., in the folded storage state), the pull pin is engaged in the slot 104 provided on the housing to prevent the handle from rotating freely after storage.
[0056] See attached document Figure 2 Appendix Figure 3 Appendix Figure 4 Appendix Figure 5 Appendix Figure 15 and attached Figure 16As shown, when the handle housing 100 rotates to the point where the limiting member 300 contacts the abutment portion 201 of the moving member 200 (i.e., when the rotation angle of the handle is within the range of the positioning portion), the surfaces of the limiting member 300 and the abutment portion 201 of the moving member 200 are tightly abutted. The limiting member 300 squeezes and pushes the moving member 200 to move closer to the gear 400. At this time, the guide portion 202 of the moving member 200 slides into the receiving groove 501 of the locking member 500. Since the receiving groove 501 has a shape structure with the opening size gradually decreasing from the outside to the inside, as the guide portion 202 of the moving member 200 gradually goes deeper, the spring on the outer peripheral surface of the moving member 200 is gradually compressed. The guide portion 202 will drive the locking member 500 to move upward. The locking member 500 will compress the spring installed on its upper end. At the same time, the lower end of the locking member 500 disengages from the tooth groove in the gear 400. The gear 400 is in an unlocked and rotatable state. At this time, the high-branch shears can work normally.
[0057] See attached document Figure 6 To be continued Figure 10 and appendix Figure 18 and attached Figure 19 As shown, when the rotation angle of the handle exceeds the range of the positioning part, the abutment part 201 of the moving part 200 loses the abutment of the limiting part 300. Under the action of the spring force on the outer peripheral surface of the moving part 200, the moving part 200 moves away from the gear 400. At this time, the guide part 202 of the moving part 200 slides out of the receiving cavity, and the contact amount between the inclined surface of the guide part 202 and the receiving cavity reaches a minimum. Under the action of the spring force with its top in a compressed state, the locking part 500 moves downward, and the lower end of the locking part 500 is engaged in the tooth groove, thereby restricting the rotational movement of the gear 400, and the high-branch shears cannot work normally. Example 2
[0058] Based on the same technical concept, refer to Appendix Figure 20 and attached Figure 21 As shown, this application embodiment provides a high-pole shearing, including the locking mechanism 10 in the above embodiment, and correspondingly has the technical effects of the locking mechanism. During use, since the limiting member 300 and the inner end face of the handle housing 100 are inside the handle housing 100, they are in a relatively closed internal environment. In this way, during the process of pushing the moving member 200 to extend and retract, the phenomenon that the high-pole shearing will not be able to work normally due to foreign objects adhering to it in the external environment can be effectively avoided, thus improving reliability.
[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.
Claims
1. A locking mechanism, comprising a handle housing and a gear for driving a shearing blade to reciprocate, characterized in that, Also includes: A limiting member fixedly installed on the end face of the inner part of the handle housing; A locking element that is slidably disposed on one side of the tooth groove of the gear; The two opposite ends abut against the limiting member and the locking member respectively. The limiting member can control the moving member to move towards or away from the gear. When the moving part moves, it can engage or disengage the locking part from the tooth groove of the gear.
2. The locking mechanism according to claim 1, characterized in that, A portion of the outer peripheral surface of the handle housing is configured as a positioning part, and a plurality of positioning holes are spaced apart along the circumferential direction on the positioning part. The handle housing is provided with a pin shaft for insertion into the positioning holes for positioning.
3. A locking mechanism according to claim 2, characterized in that, The limiting member is located on the inner end face of the positioning part.
4. A locking mechanism according to claim 3, characterized in that, The arc angle formed by the limiting member is greater than or equal to the arc angle formed by the positioning part.
5. A locking mechanism according to claim 3, characterized in that, The inner end face of the positioning part is provided with multiple limiting grooves along the circumferential direction, and the limiting member is clamped and installed in the multiple limiting grooves along the circumferential direction.
6. A locking mechanism according to claim 5, characterized in that, Limiting holes are also provided in the limiting grooves located at the outermost two ends. The opposite ends of the limiting member are respectively fixed in a pair of limiting holes, one of which communicates with the outside of the handle housing.
7. A locking mechanism according to any one of claims 1 to 6, characterized in that, The limiting component is a steel wire.
8. A locking mechanism according to claim 1, characterized in that, The moving part has an abutting part and a guiding part arranged opposite to each other. The abutting part abuts tightly with the limiting part. The locking part has a receiving groove with an opening size that gradually decreases from the outside to the inside. The guiding part has a shape structure that matches the receiving groove. The guiding part slides telescopically in the receiving groove.
9. A locking mechanism according to claim 1 or 8, characterized in that, The outer peripheral surface of the locking member has longitudinally arranged guide ribs along the circumferential direction, and the cavity for installing the locking member has a guide groove, in which the guide ribs are vertically slidably installed.
10. A locking mechanism according to claim 2, characterized in that, The handle housing has a slot, and the pin shaft can be inserted into the slot to prevent the handle housing from rotating freely when it is in the storage state.
11. A type of high-branch pruning shears, characterized in that, Includes the locking mechanism as described in any one of claims 1 to 10.