A device and method for adjusting the pre-load spring force of a saddle-shaped drum

Abstract

The application discloses a device and method for adjusting the pre-spring force of a saddle-shaped elastic drum, which can realize convenient and rapid adjustment. The device comprises a base, a wrench part, a positioning pin and a punch. The base is sleeved on a chamber of a drum body, the top surface of the base is provided with a wrench hole, a base scale groove and six base positioning pin holes, and the bottom surface of the base is provided with a central through hole for allowing a drum screw to be positioned. The wrench part comprises a wrench and a wrench screw. The head of the wrench is in the form of a cylinder, is inserted into the wrench hole and is in sliding fit, one end of the cylinder is provided with a hexagonal hole matched with the outer hexagon of a connecting shaft, the other end of the cylinder is provided with a wrench scale groove and a punch hole, and the handle of the wrench is provided with a wrench positioning pin hole. The positioning pin is inserted into the wrench positioning pin hole and is inserted into the base positioning pin hole. The punch is inserted into the punch hole and presses the top surface of the outer hexagon of the connecting shaft. The wrench screw comprises a nut, a positioning section and a threaded section, the positioning section is in sliding fit in a screw hole and is limited by the nut, and the threaded section is matched with the connecting shaft.

Description

Technical Field

[0001] This invention relates to the field of firearms technology, and in particular to a device and method for adjusting the preload spring force of a saddle-shaped magazine. Background Technology

[0002] A saddle-shaped drum magazine is a high-capacity feeding device consisting of two symmetrical drum-shaped containers. Its working principle is based on the synergy of a spring and a feed wheel, providing a continuous supply of ammunition to the firearm. Each drum-shaped container contains a spiral spring, whose main function is to provide propulsion. When the firearm is fired, the spring's potential energy is released, propelling the ammunition towards the feed port.

[0003] The loading method of a saddle-shaped drum magazine is similar to that of a traditional magazine, with ammunition loaded through a magazine catch. However, to reliably push a full drum of ammunition into the magazine catch, the spring requires a certain preload. Although the spiral spring has some spring force after being preloaded into the spring box, its spring force is relatively small and cannot ensure reliable ammunition delivery to the magazine catch. Therefore, additional preload is required. Currently, this operation cannot be achieved by hand, and while the spring force can be adjusted using simple tools, the operation is difficult and inefficient. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a device and method for adjusting the preload spring force of the saddle-shaped drum, so as to achieve convenient and rapid adjustment of the preload spring force of the saddle-shaped drum.

[0005] The objective of this invention is achieved as follows: A device for adjusting the preload spring force of a saddle-shaped drum includes a base (1), a wrench component, a positioning pin (6), and a punch (7). The base (1) has a U-shaped cross section. The base (1) is used to fit onto one chamber of the drum body (9). The top surface of the base (1) is provided with a wrench hole (101), a base groove (102) and six base positioning pin holes (103). The six base positioning pin holes (103) are evenly arranged around the wrench hole (101). The base groove (102) is arranged radially along the wrench hole (101) and corresponds to one base positioning pin hole (103). The bottom surface of the base (1) is provided with a central through hole (104). The central through hole (104) is used to make way for the drum screw (14). The wrench component includes a wrench (2) and a wrench screw (4); the wrench (2) has a head and a handle. The head of the wrench (2) is a cylinder (201), which is used to insert into the wrench hole (101) on the base to form a sliding fit. One end of the cylinder (201) is provided with a hexagonal hole (204), which is used to fit with the outer hexagon (1201) of the connecting shaft (12). The other end of the cylinder (201) is evenly distributed with six wrench grooves (207). The cylinder (201) is also evenly distributed with six punch holes (203). The wrench grooves (207), punch holes (203) and the tips of the hexagonal holes (204) are correspondingly arranged. The handle of the wrench (2) and the cylinder (201) are connected to the cylinder (201). 1) The adjacent end is provided with a wrench positioning pin hole (202). The positioning pin (6) is used to pass through the wrench positioning pin hole (202) and be inserted into the base positioning pin hole (103) to form a circumferential positioning of the wrench component. The punch (7) is used to pass through the punch hole (203) and press the outer hexagonal top surface (1202) of the connecting shaft (12). The wrench screw (4) includes a nut (401), a positioning section (402) and a threaded section (403). The positioning section (402) of the wrench screw (4) is slidably fitted in the screw hole (206) and is axially limited by the nut (401). The threaded section (403) of the wrench screw (4) is used to cooperate with the screw hole I (1208) of the connecting shaft (12).

[0006] Preferably, the positioning section of the wrench screw (4) is provided with an annular groove (404), and a retaining ring (5) is installed in the annular groove (404). The cylinder (201) of the wrench (2) is provided with a relief hole (205), which is coaxially connected with the hexagonal hole (204). The retaining ring (5) is accommodated in the relief hole (205) and forms an axial limit on the wrench screw (4).

[0007] Preferably, the handle end of the wrench (2) is provided with a handle hole (208), and a handle (3) is connected to the handle hole (208).

[0008] A method for adjusting the preload spring force of a saddle-shaped drum includes the following steps: S1. Align the rectangular groove (1204) of the connecting shaft (12) with the quasi-coil spring head (1002) of the feed wheel component, align the cylindrical section (1203) of the connecting shaft (12) with and pass through the center hole (1001) of the feed wheel until the stepped surface (1205) of the connecting shaft contacts the positioning surface (1003) of the feed wheel. S2. Place the paddle wheel component concentrically in the corresponding chamber of the drum body (9), so that the positioning hexagon (1207) of the connecting shaft (12) matches the hexagonal hole (902) of the drum body (9), and press the connecting shaft (12) down into place; S3. Place the base (1) on the corresponding chamber of the drum body (9), insert the cylinder (201) of the wrench component into the wrench hole (101), and place the hexagonal hole (204) of the wrench component on the outer hexagon (1201) of the connecting shaft (12). S4. Use a tool to engage the wrench screw (4) with the screw hole I (1208) of the connecting shaft (12) and tighten it. The connecting shaft rises, causing the positioning hexagon (1207) of the connecting shaft (12) to disengage from the hexagonal hole (902) of the drum body (9). S5. Rotate the wrench component so that one of the wrench grooves (207) is aligned with the base groove (102) and the spiral spring reaches the required preload spring force value. S6. Insert the positioning pin (6) into the aligned wrench positioning pin hole (202) and base positioning pin hole (103) to achieve circumferential positioning of the wrench component; S7. Use a tool to loosen the wrench screw (4) so ​​that the wrench screw (4) is disengaged from the connecting shaft (12). S8. Pass the working section (701) of the punch (7) through the punch hole (203) and press the outer hexagonal top surface (1202) of the connecting shaft (12) until the positioning hexagonal end face (1210) of the connecting shaft (12) fits against the bottom surface (904) of the hexagonal hole of the drum body (9); S9. Place the washer (13) on the drum screw (14), pass the drum screw (14) through the central through hole (104) of the base (1) and the central hole (903) of the drum body (9), align it with the screw hole II (1209) of the connecting shaft (12) and tighten it. S10. Remove the positioning pin (6), wrench component and base (1) in sequence to complete the assembly of the drum body corresponding to the indoor spiral spring preload and the spring-pulling wheel component.

[0009] Due to the adoption of the above technical solution, the present invention has the following beneficial effects: This invention can precisely adjust the preload spring force of the saddle-shaped drum. It features simple and practical tools, convenient and quick operation, and labor-saving characteristics, which greatly reduces the operation threshold, improves assembly efficiency and product consistency, and has great promotional value and application prospects. It can generate significant economic and social benefits.

[0010] By using the evenly distributed grooves on the base and the wrench, the abstract "spring force" is transformed into an intuitive "rotation angle", thus achieving precise and quantitative control of the preload.

[0011] By utilizing the threaded engagement between the wrench screw and the connecting shaft, the connecting shaft is axially pulled up (disengaged from its positioning) when tightened, and precisely pressed down to reset when loosened with the help of a punch. The action is smooth and self-locking.

[0012] The retaining ring and clearance hole prevent the wrench screw from coming out; the locating pin and locating pin hole achieve locking after pre-compression to prevent the spring from rebounding and causing angle deviation. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the device used in the specific implementation method; Figure 2 This is a schematic diagram of the base structure of the constituent device; Figure 3 This is a schematic diagram of the wrench component of the device; Figure 4 This is a schematic diagram of the wrench structure that makes up the device; Figure 5 This is a schematic diagram of the lever handle structure of the component device; Figure 6 This is a schematic diagram of the wrench screw structure of the component device; Figure 7 This is a schematic diagram of the retaining ring structure of the component device; Figure 8 This is a schematic diagram of the positioning pin structure of the component; Figure 9 This is a schematic diagram of the punch structure of the component device; Figure 10 This is a schematic diagram of the internal hex wrench structure of the component device; Figure 11 This is a schematic diagram of the saddle-shaped drum magazine; Figure 12 This is a structural diagram of the drum unit; Figure 13 This is a structural diagram of the right feed wheel component; Figure 14 This is a structural diagram of the left feed wheel component; Figure 15 This is a structural schematic diagram of the connecting shaft; Figure 16 This is a schematic diagram of the screw structure; Figure 17 This is a structural diagram of a washer; Figures 18a-18l This is a schematic diagram illustrating the steps for adjusting the preload spring force of the saddle-shaped drum.

[0014] Figure Labels In the attached diagram, 1-base, 2-wrench, 3-wrench handle, 4-wrench screw, 5-retaining ring, 6-locating pin, 7-punch, 8-hex wrench, 9-drum body, 10-right feed roller assembly, 11-left feed roller assembly, 12-connecting shaft, 13-washer, 14-(drum) screw; Wrench hole 101, (base) etched groove 102, (base) locating pin holes (6, evenly distributed) 103, center through hole 104, cylinder 201, (wrench) locating pin hole 202, punch hole (6, evenly distributed) 203, hexagonal hole 204, clearance hole 205, screw hole 206, (wrench) etched groove (6, evenly distributed) 207, wrench handle hole 208, cylindrical end face 209, assembly section 301, operating section 302, nut 401, locating section 402, threaded section 403, annular groove 404, positioning Section 601, Operating Section 602, Working Section 701, Operating Section 702, End Face 703, Side Surface 901, Hexagonal Hole 902, Center Hole 903, Bottom Surface of Hexagonal Hole 904, Center Hole 1001, Scroll Spring Head 1002, Positioning Surface 1003, Outer Hexagonal 1201, Outer Hexagonal Top Surface 1202, Cylindrical Section 1203, Rectangular Groove 1204, End Face 1205, Hexagonal Tip 1206, Positioning Hexagonal 1207, Screw Hole I 1208, Screw Hole II 1209, Positioning Hexagonal End Face 1210. Detailed Implementation

[0015] The invention will be further described below with reference to the accompanying drawings. See Figures 11-17 The saddle-shaped drum is a component consisting of a drum body 9, a right paddle wheel component 10, a left paddle wheel component 11, a connecting shaft 12, a washer 13, and a screw 14. The positioning hexagon 1207 of the connecting shaft mates with the hexagonal hole 902 of the drum body, the positioning hexagonal end face 1210 of the connecting shaft mates with the bottom surface 904 of the hexagonal hole of the drum body, and the cylindrical section 1203 of the connecting shaft mates with the center hole 1001 of the paddle wheel.

[0016] See Figures 1-10 An embodiment of a device for adjusting the preload spring force of a saddle-shaped drum.

[0017] In this embodiment, the device comprises a base 1, a wrench 2, a wrench handle 3, a wrench screw 4, a retaining ring 5, a locating pin 6, a punch 7, and an internal hex wrench 8. The base 1 is U-shaped, with a wrench hole 101, a groove 102, and six evenly distributed locating pin holes 103 on its top surface, and a central through hole 104 on its bottom surface. The wrench hole 101 is used to limit the radial displacement of the wrench cylinder 201. The groove 102 serves as a reference for the wrench's rotation angle. When one of the locating pin holes 103 is aligned with the wrench's locating pin hole 202, it cooperates with the locating pin 6 to achieve circumferential positioning of the wrench. The central through hole 104 is used to avoid obstruction during screw 14 installation.

[0018] The wrench 2 has a cylinder 201, a locating pin hole 202, six evenly distributed punch holes 203, a hexagonal hole 204, a clearance hole 205, a screw hole 206, and six evenly distributed scribed grooves 207 at its head, and a handle hole 208 at its tail. The cylinder 201 slides into the wrench hole 101 on the base. The locating pin hole 202 is used to achieve circumferential positioning of the wrench. The punch hole 203 serves as a clearance hole for the punch 7 to press down on the connecting shaft. The hexagonal hole 204 engages with the outer hexagon 1201 of the connecting shaft to drive the connecting shaft 12 to rotate and achieve spring force loading. The clearance hole 205 is used to allow the retaining ring 5 to pass through. The screw hole 206 allows the wrench screw 4 to pass through. The scribed grooves 207 correspond to the scribed grooves 102 on the base to provide a reference for the wrench rotation angle. The handle hole 208 engages with the assembly section 301 of the wrench handle for assembly.

[0019] The handle 3 has a stepped shaft structure, and its outer surface is provided with an assembly section 301 and an operation section 302 from fine to coarse. The assembly section 301 is interference-fitted with the handle hole 208, and the operation section 302 is used for manual operation.

[0020] The wrench screw 4 consists of a nut 401, a positioning section 402, and a threaded section 403. The screw passes through the wrench head, and the positioning section 402 is located in the screw hole 206. An annular groove 404 is provided at one end of the screw positioning section near the threaded section for installing a retaining ring 5. The retaining ring 5 is hooked in the relief hole 205 to prevent the wrench screw 4 from coming off the wrench head.

[0021] The retaining ring 5 is a steel wire retaining ring for shafts.

[0022] The positioning pin 6 is a stepped shaft structure, with a positioning section 601 and an operating section 602 arranged sequentially from thin to coarse on its outer surface; the positioning section 601 passes through one of the positioning pin holes 202 and 103 in sequence to position the wrench circumferentially, and the operating section 602 is used for manual operation.

[0023] The punch 7 has a stepped shaft structure, and its outer surface is provided with a working section 701 and an operating section 702 from fine to coarse. The working section 701 passes through one of the punch holes 203, and its end face 703 contacts the outer hexagonal top surface 1202 of the connecting shaft. The operating section 702 is used for manual operation.

[0024] The internal hex wrench 8 has an L-shaped structure and is used for assembling the wrench screw 4 and the screw 14.

[0025] Figures 18a-18l A method for adjusting the preload spring force of a saddle-shaped spring drum, comprising a device for adjusting the preload spring force of the saddle-shaped spring drum, the method comprising: First, align the cylindrical section 1203 of the connecting shaft with the center hole 1001 of the feed wheel, and align its rectangular groove 1204 with the spiral spring head 1002. Pass through the right feed wheel component until the stepped surface 1205 of the connecting shaft contacts the feed wheel positioning surface 1003. (See...) Figure 18a ; Then, place the right trigger wheel assembly 10 concentrically inside the right chamber, and manually adjust it so that the diagonal line connecting the hexagonal apex 1206 of the connecting shaft is perpendicular to the upper and lower sides 901 of the drum body. Ensure that the positioning hexagon 1207 of the connecting shaft mates with the hexagonal hole 902 of the drum body, then press it down until it is in place. (See...) Figure 18b ; Next, place the base 1 onto the right chamber of the drum body, aligning the wrench hole 101 with the screw hole I1208 of the connecting shaft, see... Figure 18c ; Next, insert the cylinder 201 of the wrench component into the wrench hole 101, ensuring that one of the graduated grooves 207 is aligned with the graduated groove 102, and fit the hexagonal hole 204 onto the outer hexagon 1201 of the connecting shaft, so that the cylindrical end face 209 is in contact with the end face 1003 of the feed wheel. See Figure 18d ; Then, using an Allen wrench 8, engage the wrench screw 4 with the screw hole 1208 of the connecting shaft and tighten it until it is in place. The connecting shaft rises, causing the positioning hexagon 1207 of the connecting shaft to disengage from the positioning hexagon hole 902 in the right chamber of the drum body. See... Figure 18e ; Then, rotating the wrench assembly clockwise by a certain angle causes it to drive the spiral spring head 1002 via the connecting shaft, bringing the preload of the spiral spring to the required value and ensuring that one of the graduated grooves 207 aligns with the graduated groove 102, thus guaranteeing the insertion position of the locating pin 6. (See...) Figure 18f ; Next, the locating pin 6 is inserted sequentially into the locating pin hole 202, and the locating pin hole 103 is aligned with the locating pin hole 202 to achieve circumferential positioning of the wrench component. See Figure 18f ; Then, use the Allen wrench 8 to loosen the wrench screw 4 and disengage it from the screw hole I1208 of the connecting shaft, see... Figure 18g ; Then, the working section 701 of the punch passes through one of the punch holes 203 and presses the outer hexagonal top surface 1202 of the connecting shaft until the positioning hexagonal end face 1210 of the connecting shaft is in contact with the bottom surface 904 of the hexagonal hole of the drum. Next, insert washer 13 onto screw 14, stand the drum body upright, and pass screw 14 sequentially through the central through hole 104 of the base and the central hole 903 of the right chamber of the drum body, aligning it with the screw hole II 1209 of the connecting shaft and tightening it. See Figure 18i ; Finally, remove the locating pin 6, the wrench assembly, and the base 1 in sequence to complete the preload loading of the spiral spring in the right chamber of the drum body and the assembly of the right feed wheel. See [link / description]. Figure 18j , 18k 18l.

[0026] The assembly of the scroll spring preload loading and the left feed wheel in the left chamber of the drum body is the same as that in the right chamber of the drum body, except that the wrench component rotates in the opposite direction.

[0027] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of the present invention.

Claims

1. A device for adjusting the preload spring force of a saddle-shaped drum, characterized in that: Includes base (1), wrench assembly, locating pin (6) and punch (7); The base (1) has a U-shaped cross section. The base (1) is used to fit onto one chamber of the drum body (9). The top surface of the base (1) is provided with a wrench hole (101), a base groove (102) and six base positioning pin holes (103). The six base positioning pin holes (103) are evenly arranged around the wrench hole (101). The base groove (102) is arranged radially along the wrench hole (101) and corresponds to one base positioning pin hole (103). The bottom surface of the base (1) is provided with a central through hole (104). The central through hole (104) is used to make way for the drum screw (14). The wrench component includes a wrench (2) and a wrench screw (4); the wrench (2) has a head and a handle. The head of the wrench (2) is a cylinder (201), which is used to insert into the wrench hole (101) on the base to form a sliding fit. One end of the cylinder (201) is provided with a hexagonal hole (204), which is used to fit with the outer hexagon (1201) of the connecting shaft (12). The other end of the cylinder (201) is evenly distributed with six wrench grooves (207). The cylinder (201) is also evenly distributed with six punch holes (203). The wrench grooves (207), punch holes (203) and the tips of the hexagonal holes (204) are correspondingly arranged. The handle of the wrench (2) and the cylinder (201) are connected to the cylinder (201). 1) The adjacent end is provided with a wrench positioning pin hole (202). The positioning pin (6) is used to pass through the wrench positioning pin hole (202) and be inserted into the base positioning pin hole (103) to form a circumferential positioning of the wrench component. The punch (7) is used to pass through the punch hole (203) and press the outer hexagonal top surface (1202) of the connecting shaft (12). The wrench screw (4) includes a nut (401), a positioning section (402) and a threaded section (403). The positioning section (402) of the wrench screw (4) is slidably fitted in the screw hole (206) and is axially limited by the nut (401). The threaded section (403) of the wrench screw (4) is used to cooperate with the screw hole I (1208) of the connecting shaft (12).

2. The device for adjusting the preload spring force of the saddle-shaped drum according to claim 1, characterized in that: The positioning section of the wrench screw (4) is provided with an annular groove (404), and a retaining ring (5) is installed in the annular groove (404). The cylinder (201) of the wrench (2) is provided with a relief hole (205), which is coaxially connected with the hexagonal hole (204). The retaining ring (5) is accommodated in the relief hole (205) and forms an axial limit on the wrench screw (4).

3. The device for adjusting the preload spring force of the saddle-shaped drum according to claim 1, characterized in that: The handle of the wrench (2) has a handle hole (208) at the end of the handle body, and the handle hole (208) is connected to the handle (3).

4. A method for adjusting the preload spring force of a saddle-shaped drum based on the device described in claim 1, characterized in that, Includes the following steps: S1. Align the rectangular groove (1204) of the connecting shaft (12) with the quasi-coil spring head (1002) of the feed wheel component, align the cylindrical section (1203) of the connecting shaft (12) with and pass through the center hole (1001) of the feed wheel until the stepped surface (1205) of the connecting shaft contacts the positioning surface (1003) of the feed wheel. S2. Place the paddle wheel component concentrically in the corresponding chamber of the drum body (9), so that the positioning hexagon (1207) of the connecting shaft (12) matches the hexagonal hole (902) of the drum body (9), and press the connecting shaft (12) down into place; S3. Place the base (1) on the corresponding chamber of the drum body (9), insert the cylinder (201) of the wrench component into the wrench hole (101), and place the hexagonal hole (204) of the wrench component on the outer hexagon (1201) of the connecting shaft (12). S4. Use a tool to engage the wrench screw (4) with the screw hole I (1208) of the connecting shaft (12) and tighten it. The connecting shaft rises, causing the positioning hexagon (1207) of the connecting shaft (12) to disengage from the hexagonal hole (902) of the drum body (9). S5. Rotate the wrench component so that one of the wrench grooves (207) is aligned with the base groove (102) and the spiral spring reaches the required preload spring force value. S6. Insert the positioning pin (6) into the aligned wrench positioning pin hole (202) and base positioning pin hole (103) to achieve circumferential positioning of the wrench component; S7. Use a tool to loosen the wrench screw (4) so ​​that the wrench screw (4) is disengaged from the connecting shaft (12). S8. Pass the working section (701) of the punch (7) through the punch hole (203) and press the outer hexagonal top surface (1202) of the connecting shaft (12) until the positioning hexagonal end face (1210) of the connecting shaft (12) fits against the bottom surface (904) of the hexagonal hole of the drum body (9); S9. Place the washer (13) on the drum screw (14), pass the drum screw (14) through the central through hole (104) of the base (1) and the central hole (903) of the drum body (9), align it with the screw hole II (1209) of the connecting shaft (12) and tighten it. S10. Remove the positioning pin (6), wrench component and base (1) in sequence to complete the assembly of the drum body corresponding to the indoor spiral spring preload and the spring wheel component.

Images