Jacquard opening transmission with bevel gear box

Abstract

The utility model discloses a jacquard opening transmission device with bevel gear box, including first longitudinal drive shaft, first longitudinal swing axle, second longitudinal swing axle, second longitudinal drive shaft and the first bevel gear box, horizontal drive shaft and second bevel gear box of downstream arrangement in main reduction bevel gear box in proper order which are supported in the frame in proper order, and main reduction bevel gear box includes main input shaft, main input bevel gear, main output shaft, reduction output bevel gear, and the first bevel gear box includes first axle, the first bevel gear of fixed in first axle one side, first reversing output shaft, first reversing bevel gear, and the second bevel gear box includes second axle, the second bevel gear of fixed in second axle other side, second reversing output shaft, second reversing bevel gear, and main output shaft, first axle, horizontal drive shaft and second axle are connected in proper order, and first reversing output shaft is connected with first longitudinal drive shaft, and second reversing output shaft is connected with second longitudinal drive shaft. The utility model motion transmission is stable, and ensures two longitudinal swing axle reverse synchronous.

Description

Technical Field

[0001] This utility model relates to a jacquard opening transmission device with a bushy tooth box, belonging to the field of transmission technology of jacquard opening machinery. Background Technology

[0002] The applicant's application, number 202321651972.8, entitled "An Improved Linkage Mechanism for Jacquard Machines" (publication number CN220284330U), provides a transmission shaft arranged outside the first and second swing shafts. The first swing shaft mainly transmits motion through a first eccentric wheel, a first horizontal connecting rod, and a first swing arm. The second swing shaft mainly transmits motion through a second eccentric wheel, a second horizontal connecting rod, and a second swing arm. However, because the second horizontal connecting rod is longer than the first, this patented technology has been found to have significant vibration in production practice, resulting in poor motion transmission stability. When this linkage mechanism is applied to high-needle-count jacquard machines, the length of the second horizontal connecting rod needs to be adapted to the corresponding needle-count model. This application scenario can lead to deformation of the second horizontal connecting rod during reciprocating motion. The consequence of deformation is that the second swing shaft, hinged to the second swing arm, has poor synchronization with the first swing shaft due to reverse oscillation. This ultimately leads to needle selection failures caused by the knife not reaching its upper stop point, manifesting as multiple weaving defects. In jacquard shedding devices that use mechanical transmission instead of direct motor drive, typical models such as Staubli CX860, CX870, LXL, and LXM are equipped with a single reduction gearbox. The main drive shaft of the jacquard shedding device extends outside the drive side wall plate, and a transition shaft is arranged at the outer end of the main drive shaft. The reduction gearbox transmits the motion of the input shaft through the input bevel gear meshing with the reduction output bevel gear, driving the reduction output shaft to rotate. The outer end of the transition shaft is connected to the reduction output shaft, while the inner end of the transition shaft is connected to the main drive shaft, thus realizing the motion required by the jacquard shedding device. However, when the structure of the single reduction gearbox transmission linkage mechanism is applied to a jacquard machine with longitudinally parallel double swing shafts, it inevitably leads to the problem of inconsistent lengths of the horizontal connecting rods in the linkage mechanism.

[0003] Therefore, the applicant filed an application with application number 202310539048.9, entitled "Electric Rotary Drive Transmission Device for Swing Mechanism on Jacquard Loom" (publication number CN116590826A). This patent application improves the technology by arranging input shafts on the outer side of each swing shaft in each swing mechanism. One end of each input shaft is driven by a motor through gear reduction, and the other end of each input shaft is connected to the swing shaft through symmetrically arranged eccentric members, cross links, and swing arms, thus forming a transmission structure of a dual-motor, dual-reduction gear, dual-input shaft, and dual-eccentric linkage mechanism, hoping to overcome the aforementioned technical shortcomings. However, the dual-motor drive structure also presents a safety issue: if the two motors lose synchronization, it will lead to electromechanical asynchrony, which can break the warp yarns, causing economic losses to the user.

[0004] Please refer to the existing deceleration bevel gearbox structure. Figures 14-16 As shown, in the factory-assembled deceleration bevel gearbox, the output bevel gear 121' is press-fitted onto the output shaft 12'. The outer end face of the output bevel gear 121' is closely adjacent to the slanted roller bearing F1', and then multiple washers 8A' are loosely fitted onto the output shaft 12', ensuring the washers are tightly against the slanted roller bearing F1'. A retaining ring 9A' mounted on the output shaft provides axial positioning, and an oil seal 82A-1' is used for sealing. The meshing clearance between the output bevel gear 121' and the input bevel gear 111' is ensured by the washers 8A'. However, during use, it was found that the washers were not durable. Dissection of damaged deceleration bevel gearboxes from existing users revealed uneven wear among the multiple washers, resulting in excessive meshing clearance between the output bevel gear 121' and the input bevel gear 111', severe wear at the meshing point, and loud abnormal noise. This necessitated time-consuming and laborious inefficient replacement of the washers. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a jacquard opening transmission device with a bevel gear box, which can not only avoid the safety problem of electromechanical step loss, but also overcome the poor motion transmission stability caused by the different lengths of the two horizontal connecting rods, which makes the longer horizontal connecting rod vibrate greatly or even deform easily.

[0006] Therefore, the present invention adopts the following technical solution:

[0007] A jacquard opening transmission device with a bevel gear box includes a main reduction bevel gear box and two parallel, sequentially supported longitudinal drive shafts, a first longitudinal swing shaft, a second longitudinal swing shaft, and a second longitudinal drive shaft. The first longitudinal drive shaft fixes a first eccentric member, and the second longitudinal drive shaft fixes a second eccentric member. The first longitudinal swing shaft fixes a first swing arm, and the second longitudinal swing shaft fixes a second swing arm. The first eccentric member is connected to the first swing arm via a first transverse connecting rod, and the second eccentric member is connected to the second swing arm via a second transverse connecting rod. The main reduction bevel gear box includes a vertically rotating main input shaft, a main input bevel gear fixed to the main input shaft, a horizontally rotating main output shaft, and a reduction output bevel gear fixed to the main output shaft. The reduction output bevel gear meshes with the main input bevel gear. Its improvement lies in… The system also includes a first bevel gear box, a transverse drive shaft, and a second bevel gear box arranged sequentially downstream of the main reduction bevel gear box. The first bevel gear box includes a first shaft that rotates laterally, a first bevel gear fixed to one end of the first shaft, a first reversing output shaft that rotates longitudinally, and a first reversing bevel gear fixed to the first reversing output shaft and meshing with the first bevel gear. The second bevel gear box includes a second shaft that rotates laterally, a second bevel gear fixed to the other end of the second shaft, a second reversing output shaft that rotates longitudinally, and a second reversing bevel gear fixed to the second reversing output shaft and meshing with the second bevel gear. The main output shaft, the first shaft, the transverse drive shaft, and the second shaft are connected sequentially. The first reversing output shaft is connected to the first longitudinal drive shaft, and the second reversing output shaft is connected to the second longitudinal drive shaft.

[0008] The first and second bevel gear boxes mentioned above are driven at equal speeds.

[0009] The frame has a crossbeam, which is a groove-shaped crossbeam. The main deceleration bevel gear box, the first bevel gear box, and the second bevel gear box are respectively fixed to the bottom of the groove of the same groove-shaped crossbeam.

[0010] This utility model provides a jacquard opening transmission device with a bevel gear box that allows for quick and reliable adjustment of the meshing clearance between the output bevel gear and the input bevel gear.

[0011] Therefore, the aforementioned main bevel gear box includes a bearing, a single pressure sleeve, and an adjusting nut arranged sequentially on the rear side of the reduction output bevel gear. The main bevel gear box has a threaded sleeve portion extending axially along the main output shaft on at least one side of its housing body. A tension groove is formed on the peripheral wall of the threaded sleeve portion. The adjusting nut is screwed onto the threaded sleeve portion, causing the front end face of the pressure sleeve to abut against the bearing. A locking bolt is screwed onto the threaded sleeve portion. The first bevel gear box includes a bearing, a single pressure sleeve, and an adjusting nut arranged sequentially on the rear side of the first bevel gear. The first bevel gear box extends axially along the first output shaft on at least one side of its housing body. The first bevel gear housing includes a threaded sleeve portion extending axially along the second shaft. The peripheral wall of the threaded sleeve portion has a tension groove. An adjusting nut is screwed onto the threaded sleeve portion so that the front end face of the pressure sleeve abuts against the bearing. A locking bolt is screwed onto the threaded sleeve portion. The second bevel gear housing includes a bearing, a single pressure sleeve, and an adjusting nut arranged sequentially on the rear side of the second bevel gear. The second bevel gear housing has a threaded sleeve portion extending axially along the second shaft on at least the other side of its housing body. The peripheral wall of the threaded sleeve portion has a tension groove. An adjusting nut is screwed onto the threaded sleeve portion so that the front end face of the pressure sleeve abuts against the bearing. A locking bolt is screwed onto the threaded sleeve portion.

[0012] The meshing clearance of the main reduction gear box, the first gear box, and the second gear box can be quickly adjusted by hand from the outside. After adjustment, the clearance is securely fastened by tensioning grooves and locking bolts, thus preventing the adjusting nut from loosening. In addition, the pressure sleeve in each of the above gear boxes is a single unit, which increases the contact area with the bearing and ensures uniform contact and wear.

[0013] The aforementioned main input bevel gear is integrally formed with the main input shaft; the first reversing bevel gear is integrally formed with the first reversing output shaft; and the second reversing bevel gear is integrally formed with the second reversing output shaft.

[0014] This utility model has the following advantages and positive effects:

[0015] The above technical solution overcomes the shortcomings of existing first and second horizontal connecting rods of different lengths, which leads to large vibration, easy deformation, and poor motion transmission stability of the long horizontal connecting rod. It ensures the synchronization of the first and second longitudinal swing shafts swinging in opposite directions, thus adapting to jacquard machines with larger needle counts. The use of three umbrella tooth boxes makes up for the shortcomings of the existing single umbrella tooth box configuration on double longitudinal swing shaft jacquard machines. Furthermore, by abandoning direct motor drive and adopting a three-umbrella tooth box transmission structure, the problem of electromechanical asynchrony is avoided. Attached Figure Description

[0016] Figure 1 This is the front view of this utility model;

[0017] Figure 2 This is a rear view of the present invention;

[0018] Figure 3 This is a top view of the present invention;

[0019] Figure 4 This is a perspective view of the present invention;

[0020] Figure 5 This is an external view of the main deceleration bevel gearbox of this utility model, wherein (a) is a front view, (b) is a side view, and (c) is a perspective view;

[0021] Figure 6 yes Figure 5 AA section view;

[0022] Figure 7 This is an exploded view of the main deceleration gearbox of this utility model;

[0023] Figure 8 This is an external view of the first bevel gear box of this utility model, wherein (a) is a front view, (b) is a top view, and (c) is a perspective view;

[0024] Figure 9 yes Figure 8 BB cross-sectional view;

[0025] Figure 10 This is an exploded view of the first bevel gear box of this utility model;

[0026] Figure 11 This is an external view of the second umbrella tooth box of this utility model, wherein (a) is a front view, (b) is a top view, and (c) is a perspective view;

[0027] Figure 12 yes Figure 11 CC section view;

[0028] Figure 13 This is an exploded view of the second bevel gear box of this utility model;

[0029] Figure 14 This is a side view of an existing bevel gear box;

[0030] Figure 15 yes Figure 14 DD sectional view;

[0031] Figure 16 This is an exploded view of an existing bevel gear box. Detailed Implementation

[0032] Please see Figures 1-13This utility model relates to a jacquard opening transmission device with a bevel gear box, including a main reduction bevel gear box 1 and two parallel longitudinal transmission shafts 5R, 6R, 6L, and 5L supported sequentially on a frame. The first longitudinal transmission shaft 5R is fixed with a first eccentric component (shown as a first crank 51R, but could also be an eccentric wheel), while the second longitudinal transmission shaft 5L is fixed with a second eccentric component (shown as a second crank 51L, but could also be an eccentric wheel). The first longitudinal crank fixes the first swing arm 61R, and the second longitudinal crank fixes the second swing arm 61L. The first eccentric component is hinged to the first swing arm 61R via a first horizontal connecting rod 7R, and the second eccentric component is hinged to the second swing arm 61L via a second horizontal connecting rod 7L. The main reduction bevel gear box 1 includes a vertically rotating main input shaft 11, a main input bevel gear 111 fixed to the main input shaft, a horizontally rotating main output shaft 12, and a reduction output bevel gear 121 fixed to the main output shaft. Figure 6 , 7 The reduction output bevel gear (shown as fixed to the right end of the main output shaft 12) meshes with the main input bevel gear. The improvement lies in the following: it also includes a first bevel gear box 2, a transverse drive shaft 4, and a second bevel gear box 3, sequentially arranged downstream of the main reduction bevel gear box 1. The first bevel gear box 2 includes a first shaft 21 that rotates laterally, and a shaft fixed to one end of the first shaft 21 (…). Figure 9 , 10 The first bevel gear 211 (shown as the right end) includes a first reversing output shaft 22 that rotates longitudinally, a first reversing bevel gear 221 fixed to the first reversing output shaft 22 and meshing with the first bevel gear 211, and a second bevel gear box 3 including a second shaft 31 that rotates laterally, and a gear fixed to the other end of the second shaft 31. Figure 12 , 13 The diagram shows a second bevel gear 311 (shown on the left side), a second reversing output shaft 32 rotating longitudinally, a second reversing bevel gear 321 fixed to the second reversing output shaft 32 and meshing with the second bevel gear 311, a main output shaft 12, a first shaft 21, a transverse transmission shaft 4, and a second shaft 31 connected in sequence (specifically using couplings; the diagram shows three elastic diaphragm couplings Q). The first reversing output shaft 22 is connected to the first longitudinal transmission shaft 5R (specifically using a coupling; the diagram shows a clamp coupling q), and the second reversing output shaft 32 is connected to the second longitudinal transmission shaft 5L (specifically using a coupling; the diagram shows a clamp coupling q). When the synchronization of the first longitudinal swing shaft 6R and the lifting arms (known parts) fixed at intervals thereon with the second longitudinal swing shaft 6L and the lifting arms fixed at intervals thereon is ensured in terms of reverse swinging, it ultimately ensures the accuracy of the upper stop point of the two sets of mutually opposing lifting knife movements (known parts not shown), thereby eliminating the occurrence of multiple weaving defects.

[0033] The first bevel gearbox 2 and the second bevel gearbox 3 are bevel gearboxes with constant speed transmission and the transmission speed is equal. Specifically, the number of teeth of the first bevel gear 211, the first reversing bevel gear 221, the second bevel gear 311, and the second reversing bevel gear 321 is equal, and all of them are equal to the number of teeth of the reduction output bevel gear 121.

[0034] The frame has crossbeams, which are channel-shaped crossbeams. In order to effectively utilize the internal space of the channel-shaped crossbeams, such as Figures 1-4 As shown, the main deceleration bevel gear box 1, the first bevel gear box 2, and the second bevel gear box 3 are respectively fixed to the bottom elevation G10 of the groove-shaped front crossbeam G1, while the crank, connecting rod, and swing arm are arranged at the groove-shaped rear crossbeam G2. Alternatively, the main deceleration bevel gear box, the first bevel gear box, and the second bevel gear box can also be fixed to the bottom elevation G20 of the groove-shaped rear crossbeam G2, in which case the eccentric crank, connecting rod, and swing arm are arranged at the groove-shaped front crossbeam G1.

[0035] The main bevel gearbox 1 includes a bearing F1 (shown as a slanted roller bearing), a single pressure sleeve 8A, and an adjusting nut 9A arranged sequentially on the rear side of the reduction output bevel gear 121. The main bevel gearbox is located at least on one side of its housing body 10. Figure 6 , 7 (Shown on the right) Extending axially along the main output shaft 12 is a threaded sleeve 10A. A tension groove 100A is formed on the peripheral wall of the threaded sleeve. An adjusting nut 9A is screwed onto the threaded sleeve 10A, causing the front end face of the pressure sleeve 8A to abut against the bearing F1. A locking bolt K1 is screwed onto the threaded sleeve 10A. Figure 6 , 7 As shown, bearing F1 is installed on the bore wall on one side of housing body 10 or on the smooth bore wall of threaded sleeve to support main output shaft 12, and pressure sleeve 8A is installed on the smooth bore wall of threaded sleeve 10A; in order to provide double-point support for main output shaft 12 and to prevent oil leakage from housing, the other side of housing body 10 ( Figure 6 , 7 The left side of the housing body 10 is also equipped with a bearing F1-1 for supporting the main output shaft 12. A threaded sleeve extends from the other side of the housing body 10 (shown as the left side), forming a symmetrical arrangement. An oil seal and an adjusting nut are also arranged on this other side. The adjusting nut is screwed onto the threaded sleeve. The bearing F1-1 is axially positioned by the shoulder of the main output shaft 12 and the adjusting nut. The pressure sleeve 8A consists of a flange portion 81A and a boss portion 82A. The boss portion 82A contains a skeleton oil seal 82A-1 that seals with the main output shaft 12. The main input shaft 11 is connected to the loom's transmission box via a universal vertical shaft, typically a reduction gear transmission connection.

[0036] The first bevel gear housing 2 includes a bearing F2 (shown as a slanted roller bearing) arranged sequentially on the rear side of the first bevel gear 211, a single pressure sleeve 8B, and an adjusting nut 9B. The first bevel gear housing is located at least on one side of its housing body 20. Figure 9 ,10 (Shown on the right) Extending axially along the first shaft 21 is a threaded sleeve portion 20A. A tension groove 200A is formed on the peripheral wall of the threaded sleeve portion. An adjusting nut 9B is screwed onto the threaded sleeve portion 20A, causing the front end face of the pressure sleeve 8B to abut against the bearing F2. A locking bolt K2 is screwed onto the threaded sleeve portion 20A. (As shown on the right) Figure 9 , 10 As shown, bearing F2 is installed on the hole wall on one side of housing body 20 or on the smooth hole wall of threaded sleeve 20A to support the first shaft 21. Pressure sleeve 8B is installed on the smooth hole wall of threaded sleeve 20A. In order to provide double-point support for the first shaft 21 and to prevent oil leakage of the housing, bearing F2-1 for supporting the first shaft 21 is also installed on the other side of housing body 20 (left side shown in the figure), and threaded sleeve extends from the other side of housing body 20 (left side shown in the figure) to form a symmetrical arrangement. Pressure sleeve and adjusting nut are also symmetrically arranged on the other side. After the oil seal is provided in the pressure sleeve, it is also screwed to the threaded sleeve by adjusting nut. Bearing F2-1 is axially positioned by the shoulder of the first shaft 21 and adjusting nut. Pressure sleeve 8B is composed of flange 81B and boss 82B. Boss 82B is provided with skeleton oil seal 82B-1 that seals with the first shaft 21.

[0037] The second bevel gear housing 3 includes a bearing F3 (shown as a slanted roller bearing) arranged sequentially behind the second bevel gear 311, a single pressure sleeve 8C, and an adjusting nut 9C. The second bevel gear housing is located at least on the other side of its housing body 30. Figure 12 , 13 (Shown on the left) Extending axially along the second shaft 31, a threaded sleeve portion 30A is provided. A tensioning groove 300A is formed on the peripheral wall of the threaded sleeve portion. An adjusting nut 9C is screwed onto the threaded sleeve portion 30A, causing the front end face of the pressure sleeve 8C to abut against the bearing F3. A locking bolt K3 is screwed onto the threaded sleeve portion 30A. (As shown) Figure 12 , 13 As shown, bearing F3 is installed on the hole wall on one side of housing body 30 or on the smooth hole wall of threaded sleeve 30A for supporting second shaft 31. Pressure sleeve 8C is installed on the smooth hole wall of threaded sleeve 30A. In order to provide double-point support for second shaft 31 and to prevent oil leakage of housing, bearing F3-1 for supporting second shaft 31 is also installed on one side of housing body 30 (right side shown in the figure), and threaded sleeve extends from one side of housing body 30 (right side shown in the figure) to form a symmetrical arrangement. Pressure sleeve and adjusting nut are also symmetrically arranged on this side. After the oil seal is provided in the pressure sleeve, it is also screwed to the threaded sleeve by adjusting nut. Bearing F3-1 is axially positioned by the shoulder of second shaft 31 and adjusting nut. Pressure sleeve 8C is composed of flange 81C and boss 82C. Boss 82C is provided with skeleton oil seal 82C-1 that seals with second shaft 31.

[0038] Rotating the adjusting nut 9A allows the bearing F1 to move along the inner wall of the threaded sleeve 10A, thereby driving the reduction output bevel gear 121 and the main output shaft 12 to move axially as a whole, thus adjusting the meshing clearance between the reduction output bevel gear 121 and the main input bevel gear 111. Similarly, rotating the adjusting nut 9B allows the bearing F2 to move along the inner wall of the threaded sleeve 20A, thereby driving the first bevel gear 211 and the first shaft 21 to move axially as a whole, thus adjusting the meshing clearance between the first bevel gear 211 and the first reversing bevel gear 221. Rotating the adjusting nut 9C allows the bearing F3 to move along the inner wall of the threaded sleeve 30A, thereby driving the second bevel gear 311 and the second shaft 31 to move axially as a whole, thus adjusting the meshing clearance between the second bevel gear 311 and the second reversing bevel gear 321.

[0039] The main input bevel gear 111 is integrally formed with the main input shaft 11, and the reduction output bevel gear 121 is tightly fitted to the main output shaft 12 by press fitting; the first bevel gear 211 is tightly fitted to the first shaft 21 by press fitting, and the first reversing bevel gear 221 is integrally formed with the first reversing output shaft 22; the second bevel gear 311 is tightly fitted to the second shaft 31 by press fitting, and the second reversing bevel gear 321 is integrally formed with the second reversing output shaft 32.

Claims

1. A jacquard opening transmission device with a bevel gear box, comprising a main reduction bevel gear box and two parallel longitudinal drive shafts, a first longitudinal swing shaft, a second longitudinal swing shaft, and a second longitudinal drive shaft supported sequentially on a frame. The first longitudinal drive shaft fixes a first eccentric member, and the second longitudinal drive shaft fixes a second eccentric member. The first longitudinal swing shaft fixes a first swing arm, and the second longitudinal swing shaft fixes a second swing arm. The first eccentric member is connected to the first swing arm via a first transverse connecting rod, and the second eccentric member is connected to the second swing arm via a second transverse connecting rod. The main reduction bevel gear box includes a vertically rotating main input shaft, a main input bevel gear fixed to the main input shaft, a horizontally rotating main output shaft, and a reduction output bevel gear fixed to the main output shaft. The reduction output bevel gear meshes with the main input bevel gear. The device is characterized in that: It also includes a first bevel gear box, a transverse drive shaft, and a second bevel gear box arranged sequentially downstream of the main reduction bevel gear box. The first bevel gear box includes a first shaft that rotates laterally, a first bevel gear fixed to one end of the first shaft, a first reversing output shaft that rotates longitudinally, and a first reversing bevel gear fixed to the first reversing output shaft and meshing with the first bevel gear. The second bevel gear box includes a second shaft that rotates laterally, a second bevel gear fixed to the other end of the second shaft, a second reversing output shaft that rotates longitudinally, and a second reversing bevel gear fixed to the second reversing output shaft and meshing with the second bevel gear. The main output shaft, the first shaft, the transverse drive shaft, and the second shaft are connected sequentially. The first reversing output shaft is connected to the first longitudinal drive shaft, and the second reversing output shaft is connected to the second longitudinal drive shaft.

2. The jacquard opening transmission device with a beveled tooth box according to claim 1, characterized in that: The first bevel gear box and the second bevel gear box are driven at equal speeds.

3. The jacquard opening transmission device with a beveled tooth box according to claim 2, characterized in that: The frame has a crossbeam, which is a groove-shaped crossbeam. The main deceleration bevel gear box, the first bevel gear box, and the second bevel gear box are respectively fixed to the bottom of the groove of the same groove-shaped crossbeam.

4. The jacquard opening transmission device with a beveled tooth box according to claim 1, 2, or 3, characterized in that: The main bevel gear box includes a bearing, a single pressure sleeve, and an adjusting nut arranged sequentially on the rear side of the reduction output bevel gear. The main bevel gear box has a threaded sleeve portion extending axially along the main output shaft on at least one side of its housing body. The peripheral wall of the threaded sleeve portion has a tension groove. The adjusting nut is screwed onto the threaded sleeve portion, causing the front end face of the pressure sleeve to abut against the bearing. A locking bolt is screwed onto the threaded sleeve portion. The first bevel gear box includes a bearing, a single pressure sleeve, and an adjusting nut arranged sequentially on the rear side of the first bevel gear. The first bevel gear box has a threaded sleeve portion extending axially along the first shaft on at least one side of its housing body. The first bevel gear box includes a threaded sleeve portion extending axially, with a tension groove formed on the peripheral wall of the threaded sleeve portion. An adjusting nut is screwed onto the threaded sleeve portion so that the front end face of the pressure sleeve abuts against the bearing. A locking bolt is screwed onto the threaded sleeve portion. The second bevel gear box includes a bearing, a single pressure sleeve, and an adjusting nut arranged sequentially on the rear side of the second bevel gear. The second bevel gear box has a threaded sleeve portion extending axially along the second shaft on at least the other side of its housing body. A tension groove is formed on the peripheral wall of the threaded sleeve portion. An adjusting nut is screwed onto the threaded sleeve portion so that the front end face of the pressure sleeve abuts against the bearing. A locking bolt is screwed onto the threaded sleeve portion.

5. The jacquard opening transmission device with a beveled tooth box according to claim 4, characterized in that: The main input bevel gear is integrally formed with the main input shaft; the first reversing bevel gear is integrally formed with the first reversing output shaft; and the second reversing bevel gear is integrally formed with the second reversing output shaft.

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