Positioning device for positioning gear of gearbox

Abstract

The utility model relates to the technical field of gearbox gear limiting devices, in particular to a positioning device for positioning gearbox gears, which comprises a gearbox body, a connecting rod, a variable speed rotating shaft and a positioning box body, the positioning box body is arranged on the outer side wall of the gearbox body close to the connecting rod, and a first limiting hole and a second limiting hole are formed in the side wall of the positioning box body; clamping grooves are formed in the left side and the right side of the connecting rod, the limiting barrel piece is arranged on the left side and the right side of the connecting rod through the clamping grooves, the limiting barrel piece comprises a sliding protruding plate and a limiting sleeve, a limiting clamping groove is formed in the circumferential side wall of the other end of the limiting sleeve, and the limiting clamping groove comprises a pushing section and a clamping section; and the positioning shaft piece comprises a rotating handle and an inserting shaft, a limiting block is arranged on the outer side of the circumference of the inserting shaft, and the limiting block is matched with the limiting clamping groove. The connecting rod is mechanically fixed, mechanical locking is achieved, gearbox faults and production accidents are avoided, and the labor intensity of workers for maintaining the gearbox is relieved.

Description

Technical Field

[0001] This utility model relates to the technical field of gearbox gear position limiting devices, and in particular to a positioning device for positioning gearbox gears. Background Technology

[0002] Gearboxes are used in a variety of scenarios. In steel smelting, gearboxes are installed in rolling mills to increase the speed of the rolls. Their working principle is to achieve the speed increase function by means of gears arranged in an orderly manner on the gear shaft.

[0003] Users operate the gearbox in the rolling mill unit, such as Figure 1 As shown, the main control mechanism relies on the extension and retraction of the hydraulic cylinder to rotate the connecting rod. When the piston rod of the hydraulic cylinder extends, the piston rod pushes the connecting rod to rotate, and the connecting rod drives the gearbox internal transmission gear shaft, causing the transmission to be in a low gear. When the piston rod of the hydraulic cylinder retracts, the piston rod pulls the connecting rod to rotate, and the connecting rod drives the gearbox internal transmission gear shaft, causing the transmission to switch to a high gear.

[0004] During on-site production, when the product is a large-size steel grade, the gearbox of the rolling mill needs to be adjusted to a low-speed position. This involves the hydraulic cylinder piston rod extending, which pushes the connecting rod to rotate, triggering a low-speed signal at the bottom of the connecting rod. This allows the gearbox to operate stably in a low-speed position. However, during prolonged production, the hydraulic cylinder piston rod often retracts. When the piston rod retracts, it pulls the connecting rod to rotate, preventing the bottom of the connecting rod from triggering the low-speed signal. This causes changes in the electrical control, leading to gearbox failure and potentially causing a production accident. Utility Model Content

[0005] This utility model provides a positioning device for locating gearbox gears. When the gearbox is in different gears, it mechanically fixes the connecting rod driven by the piston of the hydraulic cylinder, achieving mechanical locking, preventing the hydraulic cylinder piston from retracting and controlling the movement of the connecting rod, avoiding gearbox failures and production accidents, and reducing the labor intensity of personnel maintaining the gearbox.

[0006] To achieve the above objectives, this utility model provides a positioning device for locating gearbox gear positions, comprising a gearbox body, a connecting rod, and a gearbox rotating shaft, wherein one end of the connecting rod is connected to one end of the gearbox rotating shaft, and the gearbox rotating shaft passes through the gearbox body, characterized in that it further comprises:

[0007] A positioning box is provided on the outer side wall of the gearbox body near the connecting rod. A hollow cavity is provided inside the positioning box. A first limiting hole and a second limiting hole are provided on the side wall of the positioning box. The first limiting hole and the second limiting hole communicate with the hollow cavity. A fixing plate is provided at the bottom of the positioning box. Bolt holes for mating bolts are provided on the fixing plate.

[0008] A limiting sleeve is provided on both the left and right sides of the connecting rod, and multiple first locking holes are formed on the locking grooves. The limiting sleeve is set on the left and right sides of the connecting rod through the locking grooves. The limiting sleeve includes a sliding convex plate and a limiting sleeve. One end of the sliding convex plate cooperates with the locking groove. The circumferential sidewall of one end of the limiting sleeve is set on the other end of the sliding convex plate. The circumferential sidewall of the other end of the limiting sleeve is provided with a limiting groove. The limiting groove includes a pushing section and a locking section. The pushing section is a straight groove, and the locking section is an annular groove. The locking section is set on one end of the pushing section close to the sliding convex plate. Multiple second locking holes are provided on one end of the sliding convex plate. The diameter of the first locking hole is the same as the diameter of the second locking hole.

[0009] A positioning shaft component includes a rotating handle and an insert shaft. The rotating handle is provided at one end of the insert shaft, and a limiting block is provided on the outer circumference of the insert shaft. The limiting block cooperates with the limiting slot and is close to the rotating handle.

[0010] Furthermore, the positioning device for positioning the gearbox gear also includes a secondary locking shaft. Secondary locking holes are provided on the outer circumferential wall of the limiting sleeve near the sliding convex plate and the outer circumferential wall of the insertion shaft. The secondary locking holes of the limiting sleeve and the insertion shaft are located on the same vertical axis. The secondary locking shaft is inserted into the secondary locking holes of the limiting sleeve and the insertion shaft in sequence.

[0011] Furthermore, the positioning device for positioning the gearbox gear also includes an auxiliary linkage component. The auxiliary linkage component is disposed within the hollow cavity of the positioning housing. The auxiliary linkage component includes a first-gear compression component and a second-gear compression component. The first-gear compression component is located on the same side of the first limiting hole, and the second-gear compression component is located on the same side of the second limiting hole. The structure of the first-gear compression component is the same as that of the second-gear compression component. The first-gear compression component includes multiple guide posts, a compression plate, and a compression spring. The multiple guide posts are disposed within the hollow cavity of the positioning housing and are symmetrically arranged on both sides of the first limiting hole. The compression plate is slidably disposed within the hollow cavity of the positioning housing via the guide posts. The compression spring is sleeved on the guide posts. One end of the compression spring is connected to one end of the compression plate, and the other end of the compression spring is connected to the inner wall of the hollow cavity of the positioning housing away from the first limiting hole.

[0012] Furthermore, the positioning device for locating the gearbox gear position also includes a sensing limiting component, which includes a first contact post, a primary proximity sensor, and a buffer pad. The buffer pad is disposed on the inner wall of the hollow cavity of the positioning housing away from the first limiting hole. The primary proximity sensor is disposed on one side of the buffer pad. The first contact post is disposed on one end of the compression plate, and the first contact post cooperates with the primary proximity sensor.

[0013] Furthermore, the positioning device for positioning the gearbox gear also includes a contact switch, which includes multiple indicator lights, a second contact post, and a secondary proximity sensor. The secondary proximity sensor is located on the other side of the buffer pad, and the second contact post is located at one end of the compression plate. The second contact post cooperates with the secondary proximity sensor. The multiple indicator lights are respectively located on the outer wall of the positioning housing and close to the first limiting hole and the second limiting hole. The indicator lights cooperate with the secondary proximity sensor.

[0014] Preferably, the positioning device for positioning the gearbox gear further includes a chain, one end of which is fixedly mounted on the outer wall of the positioning housing, and the other end of which is fixedly mounted on the rotating handle.

[0015] Compared with the prior art, the positioning device for positioning gearbox gears according to an embodiment of the present invention provides limiting cylinders on both sides of the connecting rod to limit the connecting rod, and a positioning box as a fixed end. The positioning box is provided with a first limiting hole and a second limiting hole for the corresponding gear, so that the limiting cylinders are respectively on the same horizontal axis as the first limiting hole or the second limiting hole, and the coaxiality between the two is guaranteed. This facilitates the sequential insertion of the positioning shaft into the limiting cylinders and the first limiting hole or the second limiting hole, thereby locking the position of the connecting rod, preventing the connecting rod from moving, thus preventing damage to the gearbox and ensuring smooth production. Attached Figure Description

[0016] Figure 1 A schematic diagram of the overall structure of the speed adjustment gears in an existing gearbox;

[0017] Figure 2 This is a schematic diagram of the overall structure of a positioning device for locating gearbox gears according to the present invention;

[0018] Figure 3 This is a schematic diagram of the overall structure of the limiting cylinder in a positioning device for positioning gearbox gears according to the present invention;

[0019] Figure 4 This is a schematic diagram of the overall structure of the positioning box in a positioning device for positioning gearbox gears according to the present invention.

[0020] Figure 5 This is a top view of the positioning housing in a positioning device for locating gearbox gears according to the present invention.

[0021] Figure 6 This is a schematic diagram of the overall structure of the positioning shaft in a positioning device for positioning gearbox gears according to the present invention;

[0022] Figure 7 This is a schematic diagram of the overall structure of a positioning device for locating gearbox gears according to the present invention, showing the gear position in gear shifting mode; and

[0023] Figure 8 for Figure 7 A partial top view of the positioning box structure.

[0024] Figure label:

[0025] 1100. Gearbox body; 1200. Connecting rod; 1210. Locking groove; 1211. First locking hole; 1300. Gearbox rotating shaft;

[0026] 2000. Positioning box; 2100. Hollow cavity; 2200. First limiting hole; 2300. Second limiting hole; 2400. Fixing plate;

[0027] 3000. Limiting sleeve; 3100. Sliding convex plate; 3110. Second locking hole; 3200. Limiting sleeve; 3210. Limiting groove; 3211. Push section; 3212. Blocking section;

[0028] 4000. Positioning shaft; 4100. Rotating handle; 4200. Insert shaft; 4300. Limiting block;

[0029] 5100. Secondary locking shaft; 5200. Secondary locking hole;

[0030] 6300. Guide post; 6400. Compression plate; 6500. Compression spring;

[0031] 7110. Primary proximity sensor; 7120. First contact post; 7130. Buffer pad;

[0032] 7210. Indicator light; 7220. Second contact post; 7230. Secondary proximity sensor. Detailed Implementation

[0033] To provide a better understanding of the purpose, structure, features, and functions of this utility model, detailed descriptions are provided below with reference to specific embodiments.

[0034] like Figures 2-8As shown, a positioning device for positioning gearbox gears according to an embodiment of the present utility model includes a gearbox body, a connecting rod 1200 and a gearbox rotating shaft 1300, and also includes a positioning housing 2000, a limiting cylinder 3000 and a positioning shaft 4000.

[0035] One end of the piston rod of the hydraulic cylinder is rotatably connected to the other end of the connecting rod 1200, and one end of the connecting rod 1200 is connected to one end of the transmission shaft 1300. The transmission shaft 1300 passes through the gearbox body, and one end of the transmission shaft 1300 is located on the outside of the gearbox body.

[0036] The positioning box 2000 is located on the outer wall of the gearbox body near the connecting rod 1200. The positioning box 2000 has a hollow cavity 2100 inside. The outer wall of the positioning box 2000 has a first limiting hole 2200 and a second limiting hole 2300. The first limiting hole 2200 and the second limiting hole 2300 communicate with the hollow cavity 2100. The bottom of the positioning box 2000 is provided with a fixing plate 2400. The fixing plate 2400 has bolt holes for bolts. The user passes multiple bolts through the bolt holes to fix the positioning box 2000 to the gearbox body 1100.

[0037] A locking groove 1210 is provided on both the left and right sides of the connecting rod 1200, and multiple first locking holes 1211 are formed on the locking groove 1210. The limiting cylinder 3000 is set on the left and right sides of the connecting rod 1200 through the locking groove 1210. The limiting cylinder 3000 includes a sliding convex plate 3100 and a limiting sleeve 3200. One end of the sliding convex plate 3100 cooperates with the locking groove 1210. The circumferential sidewall of one end of the limiting sleeve 3200 is set on the other end of the sliding convex plate 3100. The circumferential sidewall of the other end of the limiting sleeve 3200 is provided with a limiting groove 3210. The limiting groove 3210 includes a pushing section 3211 and a locking section 3212. The advancing section 3211 is a straight groove, and the blocking section 3212 is an annular groove. The blocking section 3212 is located at one end of the advancing section 3211 near the sliding convex plate 3100. The sliding convex plate 3100 is provided with multiple second locking holes 3110 at one end. The diameter of the first locking hole 1211 is the same as the diameter of the second locking hole 3110. When the sliding convex plate 3100 slides into the blocking groove 1210, the first locking hole 1211 and the second locking hole 3110 are located on the same axis. The user knocks the fixing pin into the first locking hole 1211 and the second locking hole 3110, thereby fixing the limiting cylinder 3000 to the connecting rod 1200.

[0038] The positioning shaft 4000 includes a rotating handle 4100 and an insert shaft 4200. The rotating handle 4100 is provided at one end of the insert shaft 4200. A limiting block 4300 is provided on the outer circumferential wall of the insert shaft 4200. The limiting block 4300 cooperates with the limiting slot 3210 and is close to the rotating handle 4100.

[0039] In this invention, the user uses the positioning device for locating the gearbox gear position to position the already displaced connecting rod 1200, such as... Figure 7 As shown, the piston rod of the hydraulic cylinder is in the extended state, causing the piston rod to push the connecting rod 1200 to rotate towards the first limiting hole 2200, making the connecting rod 1200 approach the first limiting hole 2200. When the piston rod of the hydraulic cylinder has completed its extension and the connecting rod 1200 reaches its final position, the limiting sleeve 3200 on the limiting cylinder 3000 on the right side of the connecting rod 1200 is at the same horizontal axis position as the first limiting hole 2200. At this time, the user takes the rotating handle 4100 of the positioning shaft 4000 and inserts it into the limiting sleeve 3200. As the other end of the insertion shaft 4200 enters the limiting sleeve 3200, the upper limit block 4300 of the insertion shaft 4200 first enters the pushing section 3211 of the limiting slot 3210. When the limiting block 4300 is at the end of one end of the pushing section 3211, the insertion... The other end of shaft 4200 has been inserted into the first limiting hole 2200. At this time, the user rotates the rotating handle 4100, causing the limiting block 4300 to rotate and enter the blocking section 3212, thereby locking the positioning shaft 4000 into the limiting cylinder 3000. After the other end of the insertion shaft 4200 is inserted into the first limiting hole 2200 of the positioning box 2000, it helps to limit the position of the positioning shaft 4000. The position of the connecting rod 1200 is further locked by the above two positioning methods to prevent the piston of the hydraulic cylinder from suddenly retracting and causing the connecting rod 1200 to rotate until the production process is completed. When changing the gearbox gear again, the positioning shaft 4000 needs to be pulled out of the first limiting hole 2200 and the limiting cylinder 3000 in sequence to unlock the position of the connecting rod 1200, so that the user can switch to the next gear again.

[0040] Furthermore, such as Figure 7As shown, the positioning device for positioning the gearbox gear also includes a secondary locking shaft 5100. Secondary locking holes 5200 are provided on the outer circumferential wall of the limiting sleeve 3200 near the sliding convex plate 3100 and the outer circumferential wall of the insert shaft 4200. The secondary locking holes 5200 of the limiting sleeve 3200 and the insert shaft 4200 are located on the same vertical axis. The secondary locking shaft 5100 is sequentially inserted into the secondary locking holes 5200 of the limiting sleeve 3200 and the insert shaft 4200. After the positioning shaft 4000 has locked the connecting rod 1200, the secondary locking shaft 5100 is inserted into the secondary locking holes 5200 of the limiting sleeve 3200 and the insert shaft 4200 to achieve secondary locking of the positioning shaft 4000.

[0041] Furthermore, such as Figure 4 , Figure 5 and Figure 8 As shown, the positioning device for positioning the gearbox gear also includes an auxiliary linkage component. The auxiliary linkage component is disposed within the hollow cavity 2100 of the positioning housing 2000. The auxiliary linkage component includes a first-gear compression component and a second-gear compression component. The first-gear compression component is located on the same side of the first limiting hole 2200, and the second-gear compression component is located on the same side of the second limiting hole 2300. The structure of the first-gear compression component is the same as that of the second-gear compression component. The first-gear compression component includes multiple guide posts 6300, a compression plate 6400, and a compression spring 6500. The multiple guide posts 6300 are disposed within the... The positioning box 2000 is located inside the hollow cavity 2100, and multiple guide posts 6300 are symmetrically arranged on both sides of the first limiting hole 2200. The compression plate 6400 is slidably disposed inside the hollow cavity 2100 of the positioning box 2000 through the guide posts 6300. The compression spring 6500 is sleeved on the guide posts 6300. One end of the compression spring 6500 is connected to one end of the compression plate 6400, and the other end of the compression spring 6500 is connected to the inner wall of the hollow cavity 2100 of the positioning box 2000 away from the first limiting hole 2200. When the other end of the insertion shaft 4200 extends into the first limiting hole 2200 or the second limiting hole 2300, the insertion shaft 4200 will push the compression plate 6400 in the first or second compression component to move away from the first limiting hole 2200 or the second limiting hole 2300. The compression plate 6400 moves with the assistance of the guide post 6300, and at the same time, the compression plate 6400 compresses the compression spring 6500.

[0042] Furthermore, such as Figure 5 and Figure 8As shown, the positioning device for positioning the gearbox gear also includes a sensing limiter, which includes a first contact post 7120, a primary proximity sensor 7110, and a buffer pad 7130. The buffer pad 7130 is disposed on the inner wall of the hollow cavity 2100 of the positioning housing 2000 away from the first limiting hole 2200. The primary proximity sensor 7110 is disposed on one side of the buffer pad 7130. The first contact post 7120 is disposed on one end of the compression plate 6400, and the first contact post 7120 cooperates with the primary proximity sensor 7110. The other end of the insert shaft 4200 pushes the compression plate 6400 until the compression plate 6400 contacts the buffer pad 7130. At this time, the first contact post 7120 on the compression plate 6400 triggers the first-level proximity sensor 7110. The first-level proximity sensor 7110 is connected to the electrical control system of the gearbox and the electrical control program is modified. Only when the first-level proximity sensor 7110 and the single position sensors on both sides of the connecting rod 1200 are in the open state can the electrical system start the corresponding control operation.

[0043] Furthermore, such as Figure 5 and Figure 8 As shown, the positioning device for locating the gearbox gear also includes a contact switch, which includes multiple indicator lights 7210, a second contact post 7220, and a secondary proximity sensor 7230. The secondary proximity sensor 7230 is located on the other side of the buffer pad 7130, and the second contact post 7220 is located at one end of the compression plate 6400. The second contact post 7220 cooperates with the secondary proximity sensor 7230. The multiple indicator lights 7210 are respectively located on the outer wall of the positioning housing 2000 and near the first limiting hole 2200 and the second limiting hole 2300. The indicator lights 7210 are connected to the circuit control system where the secondary proximity sensor 7230 is located. When the first contact post 7120 triggers the primary proximity sensor 7110, the second contact post 7220 will also trigger the secondary proximity sensor 7230. The secondary proximity sensor 7230 receives the signal and transmits it to the circuit control system, illuminating the indicator lights 7210, thereby displaying the current gear information and the triggering status of the primary proximity sensor 7110, which is convenient for on-site personnel to understand intuitively.

[0044] In actual production, on-site personnel may forget to insert the positioning shaft 4000 into the limiting cylinder 3000 and the positioning housing 2000. In this case, the connecting rod 1200 will still rotate to the designated gear position, and the bottom of the connecting rod 1200 will still trigger the proximity sensor at the corresponding gear position, allowing the gearbox to operate normally. However, after the gearbox has been running for a period of time, the hydraulic cylinder will retract, resulting in damage to the entire gearbox and delaying production. Therefore, by setting auxiliary linkages, sensor limiters, and contact switches, on-site personnel can understand the gearbox status and assist in the electrical operation of the gearbox, ensuring its normal use and preventing damage.

[0045] Preferably, the positioning device for positioning the gearbox gear further includes a chain, one end of which is fixedly mounted on the outer wall of the positioning housing 2000, and the other end of which is fixedly mounted on the rotating handle 4100. The chain secures the positioning shaft 4000, preventing its loss and ensuring the positioning of the subsequent connecting rod 1200.

[0046] In the description of this utility model, it should be understood that the terms "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" and their orientation or positional relationships are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0047] This utility model has been described by the above-described embodiments; however, these embodiments are merely examples for implementing this utility model. It must be noted that the disclosed embodiments do not limit the scope of this utility model. Conversely, any modifications and refinements made without departing from the spirit and scope of this utility model are within the scope of patent protection of this utility model.

Claims

1. A positioning device for locating gear positions in a transmission, comprising a transmission body, a connecting rod, and a transmission rotating shaft, wherein one end of the connecting rod is connected to one end of the transmission rotating shaft, and the transmission rotating shaft passes through the transmission body, characterized in that, Also includes: A positioning box is provided on the outer side wall of the gearbox body near the connecting rod. A hollow cavity is provided inside the positioning box. A first limiting hole and a second limiting hole are provided on the side wall of the positioning box. The first limiting hole and the second limiting hole communicate with the hollow cavity. A fixing plate is provided at the bottom of the positioning box. Bolt holes for mating bolts are provided on the fixing plate. A limiting sleeve is provided on both the left and right sides of the connecting rod, and multiple first locking holes are formed on the locking grooves. The limiting sleeve is set on the left and right sides of the connecting rod through the locking grooves. The limiting sleeve includes a sliding convex plate and a limiting sleeve. One end of the sliding convex plate cooperates with the locking groove. The circumferential sidewall of one end of the limiting sleeve is set on the other end of the sliding convex plate. The circumferential sidewall of the other end of the limiting sleeve is provided with a limiting groove. The limiting groove includes a pushing section and a locking section. The pushing section is a straight groove, and the locking section is an annular groove. The locking section is set on one end of the pushing section close to the sliding convex plate. Multiple second locking holes are provided on one end of the sliding convex plate. The diameter of the first locking hole is the same as the diameter of the second locking hole. A positioning shaft component includes a rotating handle and an insert shaft. The rotating handle is provided at one end of the insert shaft, and a limiting block is provided on the outer circumference of the insert shaft. The limiting block cooperates with the limiting slot and is close to the rotating handle.

2. The positioning device for positioning gearbox gears according to claim 1, characterized in that, It also includes a secondary locking shaft. The outer circumferential wall of the limiting sleeve near the sliding protrusion and the outer circumferential wall of the insertion shaft are both provided with secondary locking holes. The secondary locking holes of the limiting sleeve and the insertion shaft are located on the same vertical axis. The secondary locking shaft is inserted into the secondary locking holes of the limiting sleeve and the insertion shaft in sequence.

3. The positioning device for positioning gearbox gears according to claim 1, characterized in that, It also includes auxiliary linkage components, which are disposed within the hollow cavity of the positioning box. The auxiliary linkage components include a first-stage compression component and a second-stage compression component. The first-stage compression component is located on the same side of the first limiting hole, and the second-stage compression component is located on the same side of the second limiting hole. The structure of the first-stage compression component is the same as that of the second-stage compression component. The first-stage compression component includes multiple guide posts, a compression plate, and a compression spring. The multiple guide posts are disposed within the hollow cavity of the positioning box and are symmetrically arranged on both sides of the first limiting hole. The compression plate is slidably disposed within the hollow cavity of the positioning box through the guide posts. The compression spring is sleeved on the guide posts, with one end of the compression spring connected to one end of the compression plate and the other end of the compression spring connected to the inner wall of the hollow cavity of the positioning box away from the first limiting hole.

4. The positioning device for positioning gearbox gears according to claim 3, characterized in that, It also includes a sensing and limiting component, which includes a first contact post, a primary proximity sensor, and a buffer pad. The buffer pad is disposed on the inner wall of the hollow cavity of the positioning box away from the first limiting hole. The primary proximity sensor is disposed on one side of the buffer pad. The first contact post is disposed on one end of the compression plate and cooperates with the primary proximity sensor.

5. The positioning device for positioning gearbox gears according to claim 4, characterized in that, It also includes a contact switch, which includes multiple indicator lights, a second contact post, and a secondary proximity sensor. The secondary proximity sensor is located on the other side of the buffer pad, and the second contact post is located at one end of the compression plate. The second contact post cooperates with the secondary proximity sensor. The multiple indicator lights are respectively located on the outer wall of the positioning box and close to the first limiting hole and the second limiting hole. The indicator lights cooperate with the secondary proximity sensor.

6. The positioning device for positioning gearbox gears according to claim 1, characterized in that, It also includes a chain, one end of which is fixedly mounted on the outer wall of the positioning box, and the other end of which is fixedly mounted on the rotating handle.

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