M355740 八、新型說明： 【新型所屬之技術領域】 本創作與差速n有關’特別是有關於—種應帛於模型 車之限滑差速器。 ' 5【先前技術】 當杈型車於車道上轉彎時，若是内、外兩側驅動輪的 轉速不同，將會讓模型車的轉彎相當困難。因此，通常會 在模型車之動力傳動系統中裝設一差速器，使模型車之外 側驅動輪的轉速大於_軸輪的轉速，讓模型車能順 10 過彎。 然而’當模型車之其中一個驅動輪陷於濕滑的地面而 嚴重打滑時，或者當模型車於劇烈過彎時因離心力的作用 而造成内側驅動輪離開地面並空轉時，傳統的差速器 全部的動力傳送到空轉的驅動輪，使另一個驅動輪失 15力’導致車輛容易翻覆或速度減低。 若傳統的差速ϋ安裝於競赛用之模型車，模型八 秒必爭的情訂高速過彎時，操作者通常都會持續給予ς 型車動力，以冀望其所操作的模型車能夠快速地過彎 =好成績。但是如前所述’操作者所料的動力很容易^ 20傳統的差速器傳送到空轉的驅動輪，因此，持續給予模型 車動力的結果反而將造成模型車過彎速度降低。 W有鑑於此，本案之創作人乃經詳思細索，並累積多年 從事相關行業之開發與製造經驗，終而開發出—種限滑差 連盗，讓其中一個驅動輪在另一個驅動輪空轉時，仍能獲 4 M355740 得動力，藉以有欵解決上述問題。 【新型内容】 …。本創作之主要目的在於提供—種用於模型車之限滑 5速器，可將兩個驅動輪之轉速差限制在—定的程度内，使 其^-個驅動輪在另一個驅動輪空轉時，仍能獲得動 動車輛前進。 士為達成上述目的，本創作所提供之限滑差速器包含有 一殼體、一主齒輪、一對壓板、一差速單元與一對傳動軸。 10該殼體的内部具有一容室，用以供該等壓板與該差速單元 容設；該主齒輪連接於該殼體，用以封閉該容室；該差速 單元可相對該等壓板活動地設於該等壓板之間，並具有— 十字轴、複數斜齒輪、一對齒輪架與複數彈性件，其中該 十字軸具有四端部，用以供該等斜齒輪套設，該等齒輪架 I5設於該十字軸的兩相對側’ ϋ分別具有複數凹槽，該等凹 槽兩兩相對地抵接各該第一斜齒輪之轴部’各該彈性件以 其兩端頂抵該等齒輪架，用以將該等齒輪架往相反的方向 推動；該等傳動軸穿設於該主齒輪及該殼體，並分別具有 一傳動齒輪，該等傳動齒輪嚙合該等斜齒輪。 20 該差速單元會在其中一個驅動輪的轉速過快時產生扭 矩而相對該等壓板活動，該等齒輪架於此時將會朝著該十 字轴靠近，使該等齒輪架之該等凹槽緊抵各該钭齒輪之軸 部而降低該等斜齒輪之轉速，藉以透過該等傳動齒輪的嚙 合降低轉速過快之驅動輪的轉速，並同時提升另一個驅動 M355740 輪的轉速，將兩個驅動輪之轉速差限制在一定的程度内。 【實施方式】 為了詳細說明本創作之結構、特徵及功效所在，茲舉 5以下較佳實施例並配合圖式說明如後。 請參閱第一圖至第三圖，為本創作一較佳實施例所提 供之用於模型車之限滑差速器（10)，包含有一殼體(2〇)、一 主齒輪(30)、一對壓板(4〇)、一差速單元(50)與一對傳動軸 (60 ， 70) 〇 1〇 殼體(20)内部具有一容室(22)，如第四圖所示，用以供 該等壓板(40)與差速單元(50)容設。 主齒輪(30)連接殼體(20)，可將容室(22)加以封閉。 該等壓板(40)間隔地容設於殼體(2〇)之容室(22)中，並 於内側面分別具有呈十字狀排列之四個滑槽(42)，各滑槽 I5 (42)之兩槽壁之間具有一 90度的夾角（<9)，如第二圖所示。 差速單元(50)容設於殼體(20)之容室(22)中，並位於該 等壓板(40)之間。差速單元(5〇)具有一十字軸(52)、複數斜 齒輪(54)、一對齒輪架（56)與複數彈性件(58)。十字軸(52) 具有四個端部(522) ’用以供該等斜齒輪(54)套設；該等齒 2〇輪架（56)5又於十子軸(52)的兩相對側，並於内侧面分別具有 複數凹槽(562) ’該等凹槽(562)兩兩相對地抵接各斜齒輪(54) 之一軸部(542) ’而於外側面分別具有複數個凸柱(564)，各 凸柱(564)嵌設於各壓板(40)之各滑槽(42)中，並可藉由該等 齒輪架(56)相對該等壓板(40)的活動而滑出各滑槽(S42);各 6 M355740 彈性件(58)係以其兩端了員抵該等齒輪架(56)，用㈣ 輪架(56)往相反的方向推動。 μ 鱗傳_(6G ’ 7G)相㈣-鱗(62，72声一連接 • 抽桿(62 ’ 72)之傳動齒輪(64，74)。該等傳動軸(6〇，7〇)之 、5軸桿(62，72)分別穿過殼體⑽、主齒輪⑽、該等壓板⑽） 與該等齒輪架(56)，並藉由料傳動齒輪㈣，％與該等 叙 齒輪(54)响合。當引擎的動力傳遞至主齒輪(30)而錢主齒 • 輪(3〇)與殼體(2〇)轉動時，-部分的動力將經由傳動軸(60) 而傳遞至其中-個驅動輪，另一部分的動力則經由傳動轴 10 (70)而傳遞至另一個驅動輪。 當應用本創作之模型車於直線行驶時，因左右兩側之 驅動輪所受到轉動阻力相同，本創作之限滑差速器⑽不會 產生任何作用。 f模型車以高速進行轉料，_之驅動輪因側傾作 5用而導致轉動阻力變小，轉速也就會變快，外側之驅動輪 • 1轉相會㈣。當内、外兩歉崎輪_速差距過大 =，連接關驅動輪之傳練(6嗔受到扭力作用而透過傳 〃齒輪(64)與该等斜齒輪(54)的嚙合及該等凸柱(564)與該 扣等/月槽⑷)的配合迫使差速單元⑽產生相對該等壓板(4〇) =偏擺。在差速單元(50)偏擺的同時，請參閱第五圖與第六 二’該等錄架(56)將會朝著十字軸(η)靠近並_該等彈 件(58)，使該等齒輪架(56)之凹槽(562)緊抵該等斜齒輪 4)之軸部(542)，以降低該等斜齒輪(54)的轉速，使得連接 内側驅動輪之傳動軸(6 〇)的傳動齒輪(6 4 )會受到該等斜齒 7 M355740 =1之：，=影響而降低轉速，用以降低内側驅動輪 5 10 15 力，使模型車如騎過ir卜伽減之轉速與轉動扭 齒輪等彈性件(58)會再推頂該等 之間_狀態， 驅動創，限滑差速器可有效地將兩個 此’右將本創作之限滑差速器應用競赛用之模型車時，操 == ㈣仍可持續給予模型車動力而不會降低 外提的是，各壓板之各滑槽的夾錢不限於上述 貝她例所述，而是以90度與12〇度為最佳角度。若為9〇 度’差迷單元會較容易受到驅動而相對該等壓板活動、、，若 為=度，差速單元就比較不容易受到驅動而相對該等壓 板活動。 本創作於前揭實施例中所揭露的構成元件，僅為 說明，並非用來限制本案之範圍，其他等效元件的替代或 變化，亦應為本案之申請專利範圍所涵蓋。 8 20 M355740 【圖式簡單說明】 第一圖為本創作一較佳實施例之立體圖。 第二圖為本創作一較佳實施例之立體分解圖。 第三圖為本創作一較佳實施例之側視圖。 5 第四圖為本創作一較佳實施例之側視剖視圖。 第五圖為本創作一較佳實施例於作動時之立體圖。 第六圖為第五圖之側視圖。 【主要元件符號說明】 10 限滑差速器（10) 殼體(20) 容室(22) 主齒輪(30) 壓板(40) 滑槽(42) 夾角（0) 差速單元(50) 十字軸(52) 端部(522) 15 斜齒輪(54) 軸部(542) 齒輪架(56) 凹槽（562) 凸柱(564) 彈性件(5 8) 傳動軸(60，70) 傳動齒輪(64，74) 軸桿(62，72) 9M355740 VIII. New description: [New technical field] This creation is related to the differential n. In particular, there is a limited slip differential that should be applied to the model car. ' 5 [Prior Art] When the squat type car turns in the lane, if the driving speeds of the inner and outer driving wheels are different, it will make the turning of the model car difficult. Therefore, a differential is usually installed in the powertrain of the model car, so that the rotational speed of the drive wheel on the outside of the model car is greater than the rotational speed of the _ axle, so that the model car can pass through the bend. However, when one of the model cars is heavily slipped on the slippery ground, or when the model car is subjected to severe bending, the inner drive wheel leaves the ground and idling due to the centrifugal force, the conventional differential is all The power is transmitted to the idling drive wheel, causing the other drive wheel to lose 15 forces' resulting in a vehicle that is easily overturned or slowed down. If the traditional differential ϋ is installed in the model car for competition, the model will continue to give the 动力 model power to the model car that is operated by the model. Crossing = good grades. However, as mentioned above, the power that the operator expects is easy. 20 The conventional differential is transmitted to the idling drive wheel. Therefore, the result of continuously giving the model vehicle power will cause the model car to reduce the cornering speed. In view of this, the creators of this case have carefully studied and accumulated years of experience in the development and manufacturing of related industries, and finally developed a limited slippery thief, one of which is driven by another driving wheel. When idling, you can still get 4 M355740 power, so that you can solve the above problems. [New content] .... The main purpose of this creation is to provide a limited-slip five-speed device for a model car, which can limit the difference between the two driving wheels to a certain extent, so that one driving wheel is idling on the other driving wheel. At the same time, the moving vehicle can still be obtained. In order to achieve the above objectives, the limited slip differential provided by the present invention comprises a casing, a main gear, a pair of pressure plates, a differential unit and a pair of transmission shafts. The interior of the housing has a chamber for receiving the pressure plate and the differential unit; the main gear is coupled to the housing for closing the chamber; the differential unit is opposite to the pressure plate Actively disposed between the pressure plates, and having a cross shaft, a plurality of helical gears, a pair of carrieres and a plurality of elastic members, wherein the cross shaft has four ends for the helical gears to be sleeved, The carrier I5 is disposed on opposite sides of the cross shaft, and has a plurality of grooves respectively. The grooves are oppositely abutted against the shaft portions of the first helical gears. The gear carriers are configured to push the gear carriers in opposite directions; the transmission shafts are disposed through the main gear and the housing, and each has a transmission gear that meshes with the helical gears. 20 The differential unit generates torque relative to the platen when the rotational speed of one of the drive wheels is too fast, and the gear carriers will approach the cross shaft at this time to make the concave of the carrier The groove abuts against the shaft portion of each of the spur gears to reduce the rotation speed of the spur gears, thereby reducing the rotation speed of the driving wheel which is excessively fast through the engagement of the transmission gears, and simultaneously raising the rotation speed of the other driving M355740 wheel, The difference in the rotational speed of the drive wheels is limited to a certain extent. [Embodiment] In order to explain in detail the structure, features and functions of the present invention, the following preferred embodiments are described below with reference to the drawings. Referring to the first to third figures, a limited slip differential (10) for a model vehicle according to a preferred embodiment of the present invention includes a housing (2〇) and a main gear (30). a pair of pressure plates (4 〇), a differential unit (50) and a pair of transmission shafts (60, 70) 〇 1 〇 housing (20) has a chamber (22) inside, as shown in the fourth figure, It is used for the pressure plate (40) and the differential unit (50). The main gear (30) is coupled to the housing (20) to close the chamber (22). The pressure plates (40) are respectively disposed in the chamber (22) of the casing (2), and have four sliding grooves (42) arranged in a cross shape on the inner side, and each of the sliding grooves I5 (42) There is an angle of 90 degrees (<9) between the two groove walls, as shown in the second figure. The differential unit (50) is received in the chamber (22) of the casing (20) and located between the pressure plates (40). The differential unit (5 〇) has a cross shaft (52), a plurality of helical gears (54), a pair of carrier (56) and a plurality of elastic members (58). The cross shaft (52) has four end portions (522) for arranging the helical gears (54); the two-wheel brackets (56) 5 are on opposite sides of the ten-axis (52) And having a plurality of grooves (562) on the inner side, respectively, 'the grooves (562) are oppositely abutting one of the shaft portions (542)' of each of the helical gears (54) and having a plurality of protrusions on the outer side (564), each of the protrusions (564) is embedded in each of the sliding grooves (42) of the pressure plates (40), and can be slid out by the movement of the gear carriers (56) relative to the pressure plates (40) Each chute (S42); each of the 6 M355740 elastic members (58) is urged against the carrier (56) at both ends thereof and pushed in the opposite direction by the (4) wheel carrier (56). μ 鳞传_(6G ' 7G) phase (four)-scale (62,72 sound one connection • pumping rod (62 '72) transmission gear (64, 74). These transmission shafts (6〇, 7〇), 5 shafts (62, 72) respectively pass through the casing (10), the main gear (10), the pressure plate (10) and the gear carrier (56), and by the material transmission gear (four), % and the gears (54) Ringing. When the power of the engine is transmitted to the main gear (30) and the main tooth wheel (3〇) and the casing (2〇) rotate, the power of the part will be transmitted to the drive wheel via the transmission shaft (60). The other part of the power is transmitted to the other drive wheel via the drive shaft 10 (70). When the model car of the present application is used in a straight line, the limited slip differential (10) of the present creation does not have any effect because the driving wheels on the left and right sides are subjected to the same rotational resistance. The f model car is rotated at a high speed, and the driving wheel of the _ is used for the roll to reduce the rotational resistance, and the rotational speed is also faster. The outer driving wheel • 1 phase shift (4). When the inside and outside of the two apologizes the wheel _ speed gap is too large =, the connection of the driving wheel of the transmission (6 嗔 by the torsion force through the transmission gear (64) and the helical gear (54) and the protrusion (564) Cooperating with the buckle/month tank (4) forces the differential unit (10) to produce a yaw relative to the pressure plate (4 〇). While the differential unit (50) is yawed, please refer to the fifth and sixth sections. 'The recorders (56) will approach the cross shaft (η) and _ the bullets (58) so that The grooves (562) of the carrier (56) abut against the shaft portion (542) of the helical gear 4) to reduce the rotational speed of the helical gears (54) so that the drive shaft connecting the inner drive wheels (6)传动) The transmission gear (6 4 ) will be affected by the helical gear 7 M355740 =1:, = and reduce the speed to reduce the inner drive wheel 5 10 15 force, so that the model car rides over the ir The elastic member (58) such as the rotational speed and the rotating torsion gear will push the top between the _ state, the drive, and the limited slip differential can effectively apply the two limited-slip differential applications of the right When using the model car for racing, the operation == (4) can still continue to give the model car power without reducing the external mention, the clamping of each chute of each plate is not limited to the above mentioned, but 90 degrees The best angle with 12 degrees. If it is 9 degrees, the difference unit will be more easily driven and move relative to the pressure plate. If it is = degree, the differential unit is less susceptible to driving and moves relative to the pressure plate. The constituting elements disclosed in the foregoing embodiments are merely illustrative and are not intended to limit the scope of the present invention. The alternatives or variations of other equivalent elements are also covered by the scope of the patent application. 8 20 M355740 BRIEF DESCRIPTION OF THE DRAWINGS The first figure is a perspective view of a preferred embodiment of the present invention. The second figure is an exploded perspective view of a preferred embodiment of the present invention. The third figure is a side view of a preferred embodiment of the present invention. 5 is a side cross-sectional view of a preferred embodiment of the present invention. The fifth figure is a perspective view of a preferred embodiment of the present invention when it is actuated. The sixth picture is a side view of the fifth figure. [Main component symbol description] 10 Limited slip differential (10) Housing (20) Housing (22) Main gear (30) Pressure plate (40) Chute (42) Angle (0) Differential unit (50) Cross Shaft (52) End (522) 15 Bevel gear (54) Shaft (542) Carrier (56) Groove (562) Post (564) Elastic (5 8) Drive shaft (60, 70) Drive gear (64,74) Shaft (62,72) 9